new version: 2016.3.0

Since Cygwin has SG_WINDOWS defined but is likely to expose a POSIX or
GNU-like interface, using _WIN32 to decide whether Windows-specific
functions are available seems more appropriate than SG_WINDOWS to me.

3rdparty/CMakeLists.txt

@@ -3,3 +3,7 @@ if (NOT SYSTEM_EXPAT)
 endif()
 
 add_subdirectory(utf8)
+
+if (ENABLE_DNS)
+	add_subdirectory(udns)
+endif()

3rdparty/udns/CMakeLists.txt

@@ -0,0 +1,41 @@
+include (SimGearComponent)
+INCLUDE (CheckFunctionExists)
+INCLUDE (CheckSymbolExists) 
+include (CheckIncludeFile)
+
+
+CHECK_FUNCTION_EXISTS(poll HAVE_POLL)
+CHECK_FUNCTION_EXISTS(getopt HAVE_GETOPT)
+CHECK_FUNCTION_EXISTS(inet_ntop HAVE_INET_PTON_NTOP)
+CHECK_SYMBOL_EXISTS(AF_INET6 "netinet/in.h" HAVE_IPv6) 
+# WINDOWS should be defined by msvc, should it?
+# somehow it is not, if somebody know a better way to define WINDOWS, please fix
+check_include_file(windows.h  WINDOWS)
+
+CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${CMAKE_BINARY_DIR}/config.h)
+include_directories(${CMAKE_BINARY_DIR})
+
+set(HEADERS
+)
+
+set(SOURCES
+    udns_resolver.c
+    udns_dn.c
+    udns_dntosp.c
+    udns_parse.c
+    udns_resolver.c
+    udns_init.c
+    udns_misc.c
+    udns_rr_a.c
+    udns_rr_ptr.c
+    udns_rr_mx.c
+    udns_rr_txt.c
+    udns_bl.c
+    udns_rr_srv.c
+    udns_rr_naptr.c
+    udns_codes.c
+    udns_jran.c
+    udns_XtoX.c
+)
+
+simgear_component(udns 3rdparty/udns "${SOURCES}" "${HEADERS}")

3rdparty/udns/COPYING.LGPL

@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
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+
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+
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3rdparty/udns/Makefile.in

@@ -0,0 +1,197 @@
+#! /usr/bin/make -rf
+# Makefile.in
+# libudns Makefile
+#
+# Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+# This file is part of UDNS library, an async DNS stub resolver.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library, in file named COPYING.LGPL; if not,
+# write to the Free Software Foundation, Inc., 59 Temple Place,
+# Suite 330, Boston, MA  02111-1307  USA
+
+NAME   = udns
+VERS   = 0.4
+SOVER  = 0
+
+SRCS   = udns_dn.c udns_dntosp.c udns_parse.c udns_resolver.c udns_init.c \
+	udns_misc.c udns_XtoX.c \
+	udns_rr_a.c udns_rr_ptr.c udns_rr_mx.c udns_rr_txt.c udns_bl.c \
+	udns_rr_srv.c udns_rr_naptr.c udns_codes.c udns_jran.c
+USRCS  = dnsget.c rblcheck.c ex-rdns.c
+DIST   = COPYING.LGPL udns.h udns.3 dnsget.1 rblcheck.1 $(SRCS) $(USRCS) \
+	 NEWS TODO NOTES Makefile.in configure configure.lib \
+	 inet_XtoX.c getopt.c
+
+OBJS   = $(SRCS:.c=.o) $(GEN:.c=.o)
+LIB    = lib$(NAME).a
+LIBFL  = -L. -l$(NAME)
+
+SOBJS  = $(OBJS:.o=.lo)
+SOLIB  = lib$(NAME)_s.so
+SOLIBV = lib$(NAME).so.$(SOVER)
+SOLIBFL= -L. -l$(NAME)_s
+
+UTILS   = $(USRCS:.c=)
+UOBJS   = $(USRCS:.c=.o)
+SOUTILS = $(USRCS:.c=_s)
+
+NAMEPFX = $(NAME)-$(VERS)
+
+CC = @CC@
+CFLAGS = @CFLAGS@
+CDEFS = @CDEFS@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LIBS = @LIBS@
+LDSHARED = $(LD) -shared
+PICFLAGS = -fPIC
+AWK = awk
+TAR = tar
+
+all: static
+
+.SUFFIXES: .c .o .lo
+
+static: $(LIB) $(UTILS)
+staticlib: $(LIB)
+$(LIB): $(OBJS)
+	-rm -f $@
+	$(AR) rv $@ $(OBJS)
+.c.o:
+	$(CC) $(CFLAGS) $(CDEFS) -c $<
+
+shared: $(SOLIBV) $(SOUTILS)
+sharedlib: $(SOLIBV)
+
+$(SOLIBV): $(SOBJS)
+	$(LDSHARED) -Wl,--soname,$(SOLIBV) -o $@ $(SOBJS) $(LDFLAGS) $(LIBS)
+$(SOLIB): $(SOLIBV)
+	rm -f $@
+	ln -s $(SOLIBV) $@
+.c.lo:
+	$(CC) $(CFLAGS) $(PICFLAGS) $(CDEFS) -o $@ -c $<
+
+# udns_codes.c is generated from udns.h
+udns_codes.c: udns.h
+	@echo Generating $@
+	@set -e; exec >$@.tmp; \
+	set T type C class R rcode; \
+	echo "/* Automatically generated. */"; \
+	echo "#include \"udns.h\""; \
+	while [ "$$1" ]; do \
+	 echo; \
+	 echo "const struct dns_nameval dns_$${2}tab[] = {"; \
+	 $(AWK) "/^  DNS_$${1}_[A-Z0-9_]+[ 	]*=/ \
+	  { printf \" {%s,\\\"%s\\\"},\\n\", \$$1, substr(\$$1,7) }" \
+	  udns.h ; \
+	 echo " {0,0}};"; \
+	 echo "const char *dns_$${2}name(enum dns_$${2} code) {"; \
+	 echo " static char nm[20];"; \
+	 echo " switch(code) {"; \
+	 $(AWK) "BEGIN{i=0} \
+	   /^  DNS_$${1}_[A-Z0-9_]+[ 	]*=/ \
+	   {printf \" case %s: return dns_$${2}tab[%d].name;\\n\",\$$1,i++}\
+	   " udns.h ; \
+	 echo " }"; \
+	 echo " return _dns_format_code(nm,\"$$2\",code);"; \
+	 echo "}"; \
+	 shift 2; \
+	done
+	@mv $@.tmp $@
+
+udns.3.html: udns.3
+	groff -man -Thtml udns.3 > $@.tmp
+	mv $@.tmp $@
+
+dist: $(NAMEPFX).tar.gz
+$(NAMEPFX).tar.gz: $(DIST)
+	$(TAR) -cv -f $@ -z --transform 's|^|$(NAMEPFX)/|' $(DIST)
+
+subdist:
+	cp -p $(DIST) $(TARGET)/
+
+clean:
+	rm -f $(OBJS)
+	rm -f $(SOBJS)
+	rm -f $(UOBJS)
+	rm -f config.log
+distclean: clean
+	rm -f $(LIB) $(SOLIB) $(SOLIBV) udns.3.html
+	rm -f $(UTILS) $(SOUTILS)
+	rm -f config.status config.h Makefile
+
+
+Makefile: configure configure.lib Makefile.in
+	./configure
+	@echo
+	@echo Please rerun make >&2
+	@exit 1
+
+.PHONY: all static staticlib shared sharedlib dist clean distclean subdist \
+  depend dep deps
+
+depend dep deps: $(SRCS) $(USRC)
+	@echo Generating deps for:
+	@echo \ $(SRCS)
+	@echo \ $(USRCS)
+	@sed '/^# depend/q' Makefile.in > Makefile.tmp
+	@set -e; \
+	for f in $(SRCS) $(USRCS); do \
+	 echo $${f%.c}.o $${f%.c}.lo: $$f \
+	  `sed -n 's/^#[ 	]*include[ 	]*"\(.*\)".*/\1/p' $$f`; \
+	done >> Makefile.tmp; \
+	for f in $(USRCS:.c=.o); do \
+	 echo "$${f%.?}: $$f \$$(LIB)"; \
+	 echo "	\$$(LD) \$$(LDLAGS) -o \$$@ $$f \$$(LIBFL) \$$(LIBS)"; \
+	 echo "$${f%.?}_s: $$f \$$(SOLIB)"; \
+	 echo "	\$$(LD) \$$(LDFLAGS) -o \$$@ $$f \$$(SOLIBFL)"; \
+	done >> Makefile.tmp ; \
+	if cmp Makefile.tmp Makefile.in >/dev/null 2>&1 ; then \
+	 echo Makefile.in unchanged; rm -f Makefile.tmp; \
+	else \
+	 echo Updating Makfile.in; mv -f Makefile.tmp Makefile.in ; \
+	fi
+
+# depend
+udns_dn.o udns_dn.lo: udns_dn.c udns.h
+udns_dntosp.o udns_dntosp.lo: udns_dntosp.c udns.h
+udns_parse.o udns_parse.lo: udns_parse.c udns.h
+udns_resolver.o udns_resolver.lo: udns_resolver.c config.h udns.h
+udns_init.o udns_init.lo: udns_init.c config.h udns.h
+udns_misc.o udns_misc.lo: udns_misc.c udns.h
+udns_XtoX.o udns_XtoX.lo: udns_XtoX.c config.h udns.h inet_XtoX.c
+udns_rr_a.o udns_rr_a.lo: udns_rr_a.c udns.h
+udns_rr_ptr.o udns_rr_ptr.lo: udns_rr_ptr.c udns.h
+udns_rr_mx.o udns_rr_mx.lo: udns_rr_mx.c udns.h
+udns_rr_txt.o udns_rr_txt.lo: udns_rr_txt.c udns.h
+udns_bl.o udns_bl.lo: udns_bl.c udns.h
+udns_rr_srv.o udns_rr_srv.lo: udns_rr_srv.c udns.h
+udns_rr_naptr.o udns_rr_naptr.lo: udns_rr_naptr.c udns.h
+udns_codes.o udns_codes.lo: udns_codes.c udns.h
+udns_jran.o udns_jran.lo: udns_jran.c udns.h
+dnsget.o dnsget.lo: dnsget.c config.h udns.h getopt.c
+rblcheck.o rblcheck.lo: rblcheck.c config.h udns.h getopt.c
+ex-rdns.o ex-rdns.lo: ex-rdns.c udns.h
+dnsget: dnsget.o $(LIB)
+	$(LD) $(LDLAGS) -o $@ dnsget.o $(LIBFL) $(LIBS)
+dnsget_s: dnsget.o $(SOLIB)
+	$(LD) $(LDFLAGS) -o $@ dnsget.o $(SOLIBFL)
+rblcheck: rblcheck.o $(LIB)
+	$(LD) $(LDLAGS) -o $@ rblcheck.o $(LIBFL) $(LIBS)
+rblcheck_s: rblcheck.o $(SOLIB)
+	$(LD) $(LDFLAGS) -o $@ rblcheck.o $(SOLIBFL)
+ex-rdns: ex-rdns.o $(LIB)
+	$(LD) $(LDLAGS) -o $@ ex-rdns.o $(LIBFL) $(LIBS)
+ex-rdns_s: ex-rdns.o $(SOLIB)
+	$(LD) $(LDFLAGS) -o $@ ex-rdns.o $(SOLIBFL)

3rdparty/udns/NEWS

@@ -0,0 +1,136 @@
+NEWS
+User-visible changes in udns library.  Recent changes on top.
+
+0.4 (Jan 2014)
+
+ - bugfix: fix a bug in new list code introduced in 0.3
+ - portability: use $(LD)/$(LDFLAGS)/$(LIBS)
+
+0.3 (Jan 2014)
+
+ - bugfix: refactor double-linked list implementation in udns_resolver.c
+   (internal to the library) to be more strict-aliasing-friendly, because
+   old code were miscompiled by gcc.
+
+ - bugfix: forgotten strdup() in rblcheck
+
+0.2 (Dec 2011)
+
+ - bugfix: SRV RR handling: fix domain name parsing and crash in case
+   if no port is specified on input for SRV record query
+
+ - (trivial api) dns_set_opts() now returns number of unrecognized 
+   options instead of always returning 0
+
+ - dnsget: combine -f and -o options in dnsget (and stop documenting -f),
+   and report unknown/invalid -o options (and error out)
+
+ - dnsget: pretty-print SSHFP RRs
+
+ 0.1 (Dec 2010)
+
+ - bugfix: udns_new(old) - when actually cloning another context -
+   makes the new context referencing memory from old, which leads
+   to crashes when old is modified later
+
+ - use random queue IDs (the 16bit qID) in queries instead of sequentional
+   ones, based on simple pseudo-random RNG by Bob Jenkins (udns_jran.[ch]).
+   Some people believe that this improves security (CVE-2008-1447).  I'm
+   still not convinced (see comments in udns_resolver.c), but it isn't
+   difficult to add after all.
+
+ - deprecate dns_random16() function which was declared in udns.h
+   (not anymore) but never documented.  In order to keep ABI compatible
+   it is still exported.
+
+ - library has a way now to set query flags (DNS_SET_DO; DNS_SET_CD).
+
+ - dnsget now prints non-printable chars in all strings in DNS RRs using
+   decimal escape sequences (\%03u) instead of hexadecimal (\%02x) when
+   before - other DNS software does it like this.
+
+ - recognize a few more record types in dnsget, notable some DNSSEC RRs;
+   add -f option for dnsget to set query flags.
+
+ - udns is not a Debian native package anymore (was a wrong idea)
+
+0.0.9 (16 Jan 2007)
+
+ - incompat: minor API changes in dns_init() &friends.  dns_init()
+   now requires extra `struct dns_ctx *' argument.  Not bumped
+   soversion yet - I only expect one "release" with this change.
+
+ - many small bugfixes, here and there
+
+ - more robust FORMERR replies handling - not only such replies are now
+   recognized, but udns retries queries without EDNS0 extensions if tried
+   with, but server reported FORMERR
+
+ - portability changes, udns now includes getopt() implementation fo
+   the systems lacking it (mostly windows), and dns_ntop()&dns_pton(),
+   which are either just wrappers for system functions or reimplementations.
+
+ - build is now based on autoconf-like configuration
+
+ - NAPTR (RFC3403) RR decoding support
+
+ - new file NOTES which complements TODO somewhat, and includes some
+   important shortcomings
+
+ - many internal cleanups, including some preparations for better error
+   recovery, security and robustness (and thus API changes)
+
+ - removed some #defines which are now unused (like DNS_MAXSRCH)
+
+ - changed WIN32 to WINDOWS everywhere in preprocessor tests,
+   to be able to build it on win64 as well
+
+0.0.8 (12 Sep 2005)
+
+ - added SRV records (rfc2782) parsing,
+   thanks to Thadeu Lima de Souza Cascardo for implementation.
+
+ - bugfixes:
+   o use uninitialized value when no reply, library died with assertion:
+     assert((status < 0 && result == 0) || (status >= 0 && result != 0)).
+   o on some OSes, struct sockaddr_in has additional fields, so
+     memcmp'ing two sockaddresses does not work.
+
+ - rblcheck(.1)
+
+0.0.7 (20 Apr 2005)
+
+ - dnsget.1 manpage and several enhancements to dnsget.
+
+ - allow nameserver names for -n option of dnsget.
+
+ - API change: all dns_submit*() routines now does not expect
+   last `now' argument, since requests aren't sent immediately
+   anymore.
+
+ - API change: different application timer callback mechanism.
+   Udns now uses single per-context timer instead of per-query.
+
+ - don't assume DNS replies only contain backward DN pointers,
+   allow forward pointers too.  Change parsing API.
+
+ - debianize
+
+0.0.6 (08 Apr 2005)
+
+ - use double sorted list for requests (sorted by deadline).
+   This should significantly speed up timeout processing for
+   large number of requests.
+
+ - changed debugging interface, so it is finally useable
+   (still not documented).
+
+ - dnsget routine is now Officially Useable, and sometimes
+   even more useable than `host' from BIND distribution
+   (and sometimes not - dnsget does not have -C option
+   and TCP mode)
+
+ - Debian packaging in debian/ -- udns is now maintained as a
+   native Debian package.
+
+ - alot (and I really mean alot) of code cleanups all over.

3rdparty/udns/NOTES

@@ -0,0 +1,226 @@
+Assorted notes about udns (library).
+
+UDP-only mode
+~~~~~~~~~~~~~
+
+First of all, since udns is (currently) UDP-only, there are some
+shortcomings.
+
+It assumes that a reply will fit into a UDP buffer.  With adoption of EDNS0,
+and general robustness of IP stacks, in most cases it's not an issue.  But
+in some cases there may be problems:
+
+ - if an RRset is "very large" so it does not fit even in buffer of size
+   requested by the library (current default is 4096; some servers limits
+   it further), we will not see the reply, or will only see "damaged"
+   reply (depending on the server).
+
+ - many DNS servers ignores EDNS0 option requests.  In this case, no matter
+   which buffer size udns library will request, such servers reply is limited
+   to 512 bytes (standard pre-EDNS0 DNS packet size).  (Udns falls back to
+   non-EDNO0 query if EDNS0-enabled one received FORMERR or NOTIMPL error).
+
+The problem is that with this, udns currently will not consider replies with
+TC (truncation) bit set, and will treat such replies the same way as it
+treats SERVFAIL replies, thus trying next server, or temp-failing the query
+if no more servers to try.  In other words, if the reply is really large, or
+if the servers you're using don't support EDNS0, your application will be
+unable to resolve a given name.
+
+Yet it's not common situation - in practice, it's very rare.
+
+Implementing TCP mode isn't difficult, but it complicates API significantly.
+Currently udns uses only single UDP socket (or - maybe in the future - two,
+see below), but in case of TCP, it will need to open and close sockets for
+TCP connections left and right, and that have to be integrated into an
+application's event loop in an easy and efficient way.  Plus all the
+timeouts - different for connect(), write, and several stages of read.
+
+IPv6 vs IPv4 usage
+~~~~~~~~~~~~~~~~~~
+
+This is only relevant for nameservers reachable over IPv6, NOT for IPv6
+queries.  I.e., if you've IPv6 addresses in 'nameservers' line in your
+/etc/resolv.conf file.  Even more: if you have BOTH IPv6 AND IPv4 addresses
+there.  Or pass them to udns initialization routines.
+
+Since udns uses a single UDP socket to communicate with all nameservers,
+it should support both v4 and v6 communications.  Most current platforms
+supports this mode - using PF_INET6 socket and V4MAPPED addresses, i.e,
+"tunnelling" IPv4 inside IPv6.  But not all systems supports this.  And
+more, it has been said that such mode is deprecated.
+
+So, list only IPv4 or only IPv6 addresses, but don't mix them, in your
+/etc/resolv.conf.
+
+An alternative is to use two sockets instead of 1 - one for IPv6 and one
+for IPv4.  For now I'm not sure if it's worth the complexity - again, of
+the API, not the library itself (but this will not simplify library either).
+
+Single socket for all queries
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Using single UDP socket for sending queries to all nameservers has obvious
+advantages.  First it's, again, trivial, simple to use API.  And simple
+library too.  Also, after sending queries to all nameservers (in case first
+didn't reply in time), we will be able to receive late reply from first
+nameserver and accept it.
+
+But this mode has disadvantages too.  Most important is that it's much easier
+to send fake reply to us, as the UDP port where we expects the reply to come
+to is constant during the whole lifetime of an application.  More secure
+implementations uses random port for every single query.  While port number
+(16 bits integer) can not hold much randomness, it's still of some help.
+Ok, udns is a stub resolver, so it expects sorta friendly environment, but
+on LAN it's usually much easier to fire an attack, due to the speed of local
+network, where a bad guy can generate alot of packets in a short time.
+
+Spoofing of replies (Kaminsky attack, CVE-2008-1447)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+While udns uses random numbers for query IDs, it uses single UDP port for
+all queries (see previous item).  And even if it used random UDP port for
+each query, the attack described in CVE-2008-1447 is still quite trivial.
+This is not specific to udns library unfortunately - it is inherent property
+of the protocol.  Udns is designed to work in a LAN, it needs full recursive
+resolver nearby, and modern LAN usually uses high-bandwidth equipment which
+makes the Kaminsky attack trivial.  The problem is that even with qID (16
+bits) and random UDP port (about 20 bits available to a regular process)
+combined still can not hold enough randomness, so on a fast network it is
+still easy to flood the target with fake replies and hit the "right" reply
+before real reply comes.  So random qIDs don't add much protection anyway,
+even if this feature is implemented in udns, and using all available
+techniques wont solve it either.
+
+See also long comment in udns_resolver.c, udns_newid().
+
+Assumptions about RRs returned
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Currently udns processes records in the reply it received sequentially.
+This means that order of the records is significant.  For example, if
+we asked for foo.bar A, but the server returned that foo.bar is a CNAME
+(alias) for bar.baz, and bar.baz, in turn, has address 1.2.3.4, when
+the CNAME should come first in reply, followed by A.  While DNS specs
+does not say anything about order of records - it's an rrSET - unordered, -
+I think an implementation which returns the records in "wrong" order is
+somewhat insane...
+
+CNAME recursion
+~~~~~~~~~~~~~~~
+
+Another interesting point is the handling of CNAMEs returned as replies
+to non-CNAME queries.  If we asked for foo.bar A, but it's a CNAME, udns
+expects BOTH the CNAME itself and the target DN to be present in the reply.
+In other words, udns DOES NOT RECURSE CNAMES.  If we asked for foo.bar A,
+but only record in reply was that foo.bar is a CNAME for bar.baz, udns will
+return no records to an application (NXDOMAIN).  Strictly speaking, udns
+should repeat the query asking for bar.baz A, and recurse.  But since it's
+stub resolver, recursive resolver should recurse for us instead.
+
+It's not very difficult to implement, however.  Probably with some (global?)
+flag to en/dis-able the feature.  Provided there's some demand for it.
+
+To clarify: udns handles CNAME recursion in a single reply packet just fine.
+
+Note also that standard gethostbyname() routine does not recurse in this
+situation, too.
+
+Error reporting
+~~~~~~~~~~~~~~~
+
+Too many places in the code (various failure paths) sets generic "TEMPFAIL"
+error condition.  For example, if no nameserver replied to our query, an
+application will get generic TEMPFAIL, instead of something like TIMEDOUT.
+This probably should be fixed, but most applications don't care about the
+exact reasons of failure - 4 common cases are already too much:
+  - query returned some valid data
+  - NXDOMAIN
+  - valid domain but no data of requested type - =NXDOMAIN in most cases
+  - temporary error - this one sometimes (incorrectly!) treated as NXDOMAIN
+    by (naive) applications.
+DNS isn't yes/no, it's at least 3 variants, temp err being the 3rd important
+case!  And adding more variations for the temp error case is complicating things
+even more - again, from an application writer standpoint.  For diagnostics,
+such more specific error cases are of good help.
+
+Planned API changes
+~~~~~~~~~~~~~~~~~~~
+
+At least one thing I want to change for some future version is a way how
+queries are submitted and how replies are handled.
+
+I want to made dns_query object to be owned by an application.  So that instead
+of udns library allocating it for the lifetime of query, it will be pre-
+allocated by an application.  This simplifies and enhances query submitting
+interface, and complicates it a bit too, in simplest cases.
+
+Currently, we have:
+
+dns_submit_dn(dn, cls, typ, flags, parse, cbck, data)
+dns_submit_p(name, cls, typ, flags, parse, cbck, data)
+dns_submit_a4(ctx, name, flags, cbck, data)
+
+and so on -- with many parameters missed for type-specific cases, but generic
+cases being too complex for most common usage.
+
+Instead, with dns_query being owned by an app, we will be able to separately
+set up various parts of the query - domain name (various forms), type&class,
+parser, flags, callback...  and even change them at runtime.  And we will also
+be able to reuse query structures, instead of allocating/freeing them every
+time.  So the whole thing will look something like:
+
+ q = dns_alloc_query();
+ dns_submit(dns_q_flags(dns_q_a4(q, name, cbck), DNS_F_NOSRCH), data);
+
+The idea is to have a set of functions accepting struct dns_query* and
+returning it (so the calls can be "nested" like the above), to set up
+relevant parts of the query - specific type of callback, conversion from
+(type-specific) query parameters into a domain name (this is for type-
+specific query initializers), and setting various flags and options and
+type&class things.
+
+One example where this is almost essential - if we want to support
+per-query set of nameservers (which isn't at all useless: imagine a
+high-volume mail server, were we want to direct DNSBL queries to a separate
+set of nameservers, and rDNS queries to their own set and so on).  Adding
+another argument (set of nameservers to use) to EVERY query submitting
+routine is.. insane.  Especially since in 99% cases it will be set to
+default NULL.  But with such "nesting" of query initializers, it becomes
+trivial.
+
+This change (the way how queries gets submitted) will NOT break API/ABI
+compatibility with old versions, since the new submitting API works in
+parallel with current (and current will use the new one as building
+blocks, instead of doing all work at once).
+
+Another way to do the same is to manipulate query object right after a
+query has been submitted, but before any events processing (during this
+time, query object is allocated and initialized, but no actual network
+packets were sent - it will happen on the next event processing).  But
+this way it become impossible to perform syncronous resolver calls, since
+those calls hide query objects they use internally.
+
+Speaking of replies handling - the planned change is to stop using dynamic
+memory (malloc) inside the library.  That is, instead of allocating a buffer
+for a reply dynamically in a parsing routine (or memdup'ing the raw reply
+packet if no parsing routine is specified), I want udns to return the packet
+buffer it uses internally, and change parsing routines to expect a buffer
+for result.  When parsing, a routine will return true amount of memory it
+will need to place the result, regardless of whenever it has enough room
+or not, so that an application can (re)allocate properly sized buffer and
+call a parsing routine again.
+
+This, in theory, also can be done without breaking current API/ABI, but in
+that case we'll again need a parallel set of routines (parsing included),
+which makes the library more complicated with too many ways of doing the
+same thing.  Still, code reuse is at good level.
+
+Another modification I plan to include is to have an ability to work in
+terms of domain names (DNs) as used with on-wire DNS packets, not only
+with asciiz representations of them.  For this to work, the above two
+changes (query submission and result passing) have to be completed first
+(esp. the query submission part), so that it will be possible to specify
+some additional query flags (for example) to request domain names instead
+of the text strings, and to allow easy query submissions with either DNs
+or text strings.

3rdparty/udns/TODO

@@ -0,0 +1,59 @@
+TODO
+
+The following is mostly an internal, not user-visible stuff.
+
+* rearrange an API to make dns_query object owned by application,
+  so that it'll look like this:
+   struct dns_query *q;
+   q = dns_query_alloc(ctx);
+   dns_query_set(q, options, domain_name, flags, ...);
+   dns_query_submit(ctx, q);
+  For more information see NOTES file, section "Planned API changes".
+
+* allow NULL callbacks?  Or provide separate resolver
+  context list of queries which are done but wich did not
+  have callback, and dns_pick() routine to retrieve results
+  from this query, i.e. allow non-callback usage?  The
+  non-callback usage may be handy sometimes (any *good*
+  example?), but it will be difficult to provide type-safe
+  non-callback interface due to various RR-specific types
+  in use.
+
+* DNS_OPT_FLAGS should be DNS_OPT_ADDFLAGS and DNS_OPT_SETFLAGS.
+  Currently one can't add a single flag bit but preserve
+  existing bits... at least not without retrieving all current
+  flags before, which isn't that bad anyway.
+
+* dns_set_opts() may process flags too (such as aaonly etc)
+
+* a way to disable $NSCACHEIP et al processing?
+  (with now separate dns_init() and dns_reset(), it has finer
+  control, but still no way to init from system files but ignore
+  environment variables and the like)
+
+* initialize/open the context automatically, and be more
+  liberal about initialization in general?
+
+* dns_init(ctx, do_open) - make the parameter opposite, aka
+  dns_init(ctx, skip_open) ?
+
+* allow TCP queue?
+
+* more accurate error reporting.  Currently, udns always returns TEMPFAIL,
+  but don't specify why it happened (ENOMEM, timeout, etc).
+
+* check the error value returned by recvfrom() and
+  sendto() and determine which errors to ignore.
+
+* maybe merge dns_timeouts() and dns_ioevent(), to have
+  only one entry point for everything?  For traditional
+  select-loop-based eventloop it may be easier, but for
+  callback-driven event loops the two should be separate.
+  Provide an option, or a single dns_events() entry point
+  for select-loop approach, or just call dns_ioevent()
+  from within dns_timeouts() (probably after renaming
+  it to be dns_events()) ?
+
+* implement /etc/hosts lookup too, ala [c-]ares??
+
+* sortlist support?

3rdparty/udns/config.h.in

@@ -0,0 +1,5 @@
+#cmakedefine HAVE_POLL
+#cmakedefine HAVE_GETOPT
+#cmakedefine HAVE_INET_PTON_NTOP
+#cmakedefine HAVE_IPv6
+#cmakedefine WINDOWS

3rdparty/udns/configure

@@ -0,0 +1,165 @@
+#! /bin/sh
+# autoconf-style configuration script
+#
+
+set -e
+
+name=udns
+
+if [ -f udns.h -a -f udns_resolver.c ] ; then :
+else
+  echo "configure: error: sources not found at `pwd`" >&2
+  exit 1
+fi
+
+options="ipv6"
+
+for opt in $options; do
+  eval enable_$opt=
+done
+
+if [ -f config.status ]; then
+  . ./config.status
+fi
+
+enable() {
+  opt=`echo "$1" | sed 's/^--[^-]*-//'`
+  case "$opt" in
+    ipv6) ;;
+    *) echo "configure: unrecognized option \`$1'" >&2; exit 1;;
+  esac
+  eval enable_$opt=$2
+}
+
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --disable-*|--without-*|--no-*) enable "$1" n;;
+    --enable-*|--with-*) enable "$1" y;;
+    --help | --hel | --he | --h | -help | -hel | -he | -h )
+      cat <<EOF
+configure: configure $name package.
+Usage: ./configure [options]
+where options are:
+ --enable-option, --with-option --
+   enable the named option/feature
+ --disable-option, --without-option, --no-option --
+   disable the named option/feature
+ --help - print this help and exit
+Optional features (all enabled by default if system supports a feature):
+  ipv6 - enable/disable IP version 6 (IPv6) support
+EOF
+      exit 0
+      ;;
+    *) echo "configure: unknown option \`$1'" >&2; exit 1 ;;
+  esac
+  shift
+done
+
+. ./configure.lib
+
+ac_msg "configure"
+ac_result "$name package"
+
+ac_prog_c_compiler_v
+ac_prog_ranlib_v
+
+ac_ign ac_yesno "for getopt()" ac_have GETOPT ac_link <<EOF
+#include <stdio.h>
+extern int optind;
+extern char *optarg;
+extern int getopt(int, char **, char *);
+int main(int argc, char **argv) {
+  getopt(argc, argv, "abc");
+  return optarg ? optind : 0;
+}
+EOF
+
+if ac_library_find_v 'socket and connect' "" "-lsocket -lnsl" <<EOF
+int main() { socket(); connect(); return 0; }
+EOF
+then :
+else
+  ac_fatal "cannot find libraries needed for sockets"
+fi
+
+ac_ign \
+ ac_yesno "for inet_pton() && inet_ntop()" \
+ ac_have INET_PTON_NTOP \
+ ac_link <<EOF
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+int main() {
+  char buf[64];
+  long x = 0;
+  inet_pton(AF_INET, &x, buf);
+  return inet_ntop(AF_INET, &x, buf, sizeof(buf));
+} 
+EOF
+
+if ac_yesno "for socklen_t" ac_compile <<EOF
+#include <sys/types.h>
+#include <sys/socket.h>
+int foo() { socklen_t len; len = 0; return len; }
+EOF
+then :
+else
+  ac_define socklen_t int
+fi
+
+if [ n != "$enable_ipv6" ]; then
+if ac_yesno "for IPv6" ac_have IPv6 ac_compile <<EOF
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+int main() {
+  struct sockaddr_in6 sa;
+  sa.sin6_family = AF_INET6;
+  return 0;
+}
+EOF
+then :
+elif [ "$enable_ipv6" ]; then
+  ac_fatal "IPv6 is requested but not available"
+fi
+fi # !disable_ipv6?
+
+if ac_yesno "for poll()" ac_have POLL ac_link <<EOF
+#include <sys/types.h>
+#include <sys/poll.h>
+int main() {
+  struct pollfd pfd[2];
+  return poll(pfd, 2, 10);
+}
+EOF
+then :
+else
+  ac_ign ac_yesno "for sys/select.h" ac_have SYS_SELECT_H ac_cpp <<EOF
+#include <sys/types.h>
+#include <sys/select.h>
+EOF
+fi
+
+ac_config_h
+ac_output Makefile
+ac_msg "creating config.status"
+rm -f config.status
+{
+echo "# automatically generated by configure to hold command-line options"
+echo
+found=
+for opt in $options; do
+  eval val=\$enable_$opt
+  if [ -n "$val" ]; then
+    echo enable_$opt=$val
+    found=y
+  fi
+done
+if [ ! "$found" ]; then
+  echo "# (no options encountered)"
+fi
+} > config.status
+ac_result ok
+
+ac_result "all done."
+exit 0

3rdparty/udns/configure.lib

@@ -0,0 +1,268 @@
+# configure.lib
+# a library of shell routines for simple autoconf system
+#
+
+set -e
+ac_substitutes=
+rm -f conftest* config.log
+exec 5>config.log
+cat <<EOF >&5
+This file contains any messages produced by compilers etc while
+running configure, to aid debugging if configure script makes a mistake.
+
+EOF
+
+case `echo "a\c"` in
+  *c*) ac_en=-n ac_ec= ;;
+  *)   ac_en= ac_ec='\c' ;;
+esac
+
+##### Messages
+ac_msg() {
+  echo $ac_en "$*... $ac_ec"
+  echo ">>> $*" >&5
+}
+ac_checking() {
+  echo $ac_en "checking $*... $ac_ec"
+  echo ">>> checking $*" >&5
+}
+ac_result() {
+  echo "$1"
+  echo "=== $1" >&5
+}
+ac_fatal() {
+  echo "configure: fatal: $*" >&2
+  echo "=== FATAL: $*" >&5
+  exit 1
+}
+ac_warning() {
+  echo "configure: warning: $*" >&2
+  echo "=== WARNING: $*" >&5
+}
+ac_ign() {
+  "$@" || :
+}
+
+# ac_run command...
+# captures output in conftest.out
+ac_run() {
+  # apparently UnixWare (for one) /bin/sh optimizes the following "if"
+  # "away", by checking if there's such a command BEFORE redirecting
+  # output.  So error message (like "gcc: command not found") goes
+  # to stderr instead of to conftest.out, and `cat conftest.out' below
+  # fails.
+  if "$@" >conftest.out 2>&1; then
+    return 0
+  else
+    echo "==== Command invocation failed. Command line was:" >&5
+    echo "$*" >&5
+    echo "==== compiler input was:" >&5
+    cat conftest.c >&5
+    echo "==== output was:" >&5
+    cat conftest.out >&5
+    echo "====" >&5
+    return 1
+  fi
+}
+
+# common case for ac_verbose: yes/no result
+ac_yesno() {
+  ac_checking "$1"
+  shift
+  if "$@"; then
+    ac_result yes
+    return 0
+  else
+    ac_result no
+    return 1
+  fi
+}
+
+ac_subst() {
+  ac_substitutes="$ac_substitutes $*"
+}
+
+ac_define() {
+  CDEFS="$CDEFS -D$1=${2:-1}"
+}
+
+ac_have() {
+  ac_what=$1; shift
+  if "$@"; then
+    ac_define HAVE_$ac_what
+    eval ac_have_$ac_what=yes
+    return 0
+  else
+    eval ac_have_$ac_what=no
+    return 1
+  fi
+}
+
+##### Compiling, linking
+
+# run a compiler
+ac_run_compiler() {
+  rm -f conftest*; cat >conftest.c
+  ac_run $CC $CFLAGS $CDEFS "$@" conftest.c
+}
+
+ac_compile() {
+  ac_run_compiler -c
+}
+
+ac_link() {
+  ac_run_compiler -o conftest $LIBS "$@"
+}
+
+ac_cpp() {
+  ac_run_compiler -E "$@"
+}
+
+### check for C compiler.  Set $CC, $CFLAGS etc
+ac_prog_c_compiler_v() {
+  ac_checking "for C compiler"
+  rm -f conftest*
+  echo 'int main(int argc, char **argv) { return 0; }' >conftest.c
+
+  if [ -n "$CC" ]; then
+    if ac_run $CC -o conftest conftest.c && ac_run ./conftest; then
+      ac_result "\$CC ($CC)"
+    else
+      ac_result no
+      ac_fatal "\$CC ($CC) is not a working compiler"
+    fi
+  else
+    for cc in gcc cc ; do
+      if ac_run $cc -o conftest conftest.c && ac_run ./conftest; then
+        ac_result "$cc"
+        CC=$cc
+        break
+      fi
+    done
+    if [ -z "$CC" ]; then
+      ac_result no
+      ac_fatal "no working C compiler found in \$PATH. please set \$CC variable"
+    fi
+  fi
+  if [ -z "$CFLAGS" ]; then
+    if ac_yesno "whenever C compiler ($CC) is GNU CC" \
+        ac_grep_cpp yEs_mAsTeR <<EOF
+#ifdef __GNUC__
+  yEs_mAsTeR;
+#endif
+EOF
+    then
+      CFLAGS="-Wall -W -O2 -pipe"
+    else
+      CFLAGS=-O
+    fi
+  fi
+  cc="$CC $CFLAGS"
+  ccld="$cc"
+  if [ -n "$LDFLAGS" ]; then ccld="$ccld $LDFLAGS"; fi
+  if [ -n "$LIBS" ]; then ccld="$ccld $LIBS"; fi
+  if ac_yesno "whenever the C compiler ($ccld)
+           can produce executables" \
+     ac_compile_run <<EOF
+int main() { return 0; }
+EOF
+  then :
+  else
+    ac_fatal "no working C compiler found"
+  fi
+  LD='$(CC)'
+  [ -n "$AR" ] || AR=ar
+  [ -n "$ARFLAGS" ] || ARFLAGS=rv
+  [ -n "$AWK" ] || AWK=awk
+  ac_substitutes="$ac_substitutes CC CFLAGS CDEFS LD LDFLAGS LIBS AR ARFLAGS AWK"
+}
+
+
+ac_prog_ranlib_v() {
+  ac_checking "for ranlib"
+  if [ -n "$RANLIB" ]; then
+    ac_result "\$RANLIB ($RANLIB)"
+  else
+    ifs="$IFS"
+    IFS=:
+    for dir in $PATH; do
+      [ -n "$dir" ] || dir=.
+      if [ -f $dir/ranlib ]; then
+        RANLIB=ranlib
+        break
+      fi
+    done
+    IFS="$ifs"
+    if [ -z "$RANLIB" ]; then ac_result no; RANLIB=:
+    else ac_result "$RANLIB"
+    fi
+  fi
+  ac_substitutes="$ac_substitutes RANLIB"
+}
+
+ac_library_find_v() {
+  ac_checking "for libraries needed for $1"
+  shift
+  fond=
+  rm -f conftest*; cat >conftest.c
+  for lib in "$@"; do
+    if ac_run $CC $CFLAGS $LDFLAGS conftest.c -o conftest $LIBS $lib; then
+      found=y
+      break
+    fi
+  done
+  if [ ! "$found" ]; then
+    ac_result "not found"
+    return 1
+  fi
+  if [ -z "$lib" ]; then
+    ac_result "ok (none needed)"
+  else
+    ac_result "ok ($lib)"
+    LIBS="$LIBS $lib"
+  fi
+}
+
+ac_compile_run() {
+  ac_link "$@" && ac_run ./conftest
+}
+
+ac_grep_cpp() {
+  pattern="$1"; shift
+  ac_cpp "$@" && grep "$pattern" conftest.out >/dev/null
+}
+
+ac_output() {
+  for var in $ac_substitutes; do
+    eval echo "\"s|@$var@|\$$var|\""
+  done >conftest.sed
+  for file in "$@"; do
+    ac_msg "creating $file"
+    if [ -f $file.in ]; then
+      sed -f conftest.sed $file.in > $file.tmp
+      mv -f $file.tmp $file
+      ac_result ok
+    else
+      ac_result failed
+      ac_fatal "$file.in not found"
+    fi
+  done
+  rm -f conftest*
+}
+
+ac_config_h() {
+  h=${1:-config.h}
+  ac_msg "creating $h"
+  rm -f $1.tmp
+  echo "/* automatically generated by configure. */" > $h.tmp
+  echo "$CDEFS" | tr ' ' '
+' | sed -e 's/^-D/#define /' -e 's/=/ /' >> $h.tmp
+  if [ -f $h ] && cmp -s $h.tmp $h ; then
+    rm -f $h.tmp
+    ac_result unchanged
+  else
+    mv -f $h.tmp $h
+    ac_result ok
+  fi
+  CDEFS=-DHAVE_CONFIG_H
+}

3rdparty/udns/dnsget.1

@@ -0,0 +1,195 @@
+.\" dnsget.1: dnsget manpage
+.\"
+.\" Copyright (C) 2005-2014  Michael Tokarev <mjt+udns@tls.msk.ru>
+.\" This file is part of UDNS library, an async DNS stub resolver.
+.\"
+.\" This library is free software; you can redistribute it and/or
+.\" modify it under the terms of the GNU Lesser General Public
+.\" License as published by the Free Software Foundation; either
+.\" version 2.1 of the License, or (at your option) any later version.
+.\"
+.\" This library is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+.\" Lesser General Public License for more details.
+.\"
+.\" You should have received a copy of the GNU Lesser General Public
+.\" License along with this library, in file named COPYING.LGPL; if not,
+.\" write to the Free Software Foundation, Inc., 59 Temple Place,
+.\" Suite 330, Boston, MA  02111-1307  USA
+
+.TH dnsget 1 "Jan 2014" "User Utilities"
+
+.SH NAME
+dnsget \- DNS lookup utility
+
+.SH SYNOPSYS
+.B dnsget
+.RB [\| \-v \||\| \-q \|]
+.RB [\| \-c
+.IR class \|]
+.RB [\| \-t
+.IR type \|]
+.RB [\| \-o
+.IR opt , opt ,...]
+.IR name \|.\|.\|.
+
+.SH DESCRIPTION
+.B dnsget
+is a simple command-line to perform DNS lookups, similar to
+.BR host (1)
+and
+.BR dig (1).
+It is useable for both interactive/debugging scenarious and
+in scripts.
+The program is implemented using
+.BR udns (3)
+library.
+
+.PP
+By default,
+.B dnsget
+produces a human-readable output, similar to
+.RS
+.nf
+alias.example.com. CNAME www.example.com.
+www.example.com. A 192.168.1.1
+www.example.com. MX 10 mx.example.com.
+.fi
+.RE
+which is just sufficient to see how a given name resolves.
+Output format is controllable with
+.B \-v
+and
+.B \-q
+options -- the former increases verbosity level up to printing
+the whole DNS contents of all packets sent and received, which
+is suitable for debugging DNS problems, while the latter reduces
+the level, making output more quiet, up to bare result with no
+error messages, which is good for scripts.
+
+.SH OPTIONS
+
+The following options are recognized by
+.BR dnsget :
+
+.TP
+.B \-v
+produce more detailed output.  More
+.BR \-v 's
+means more details will be produced.  With single
+.BR \-v , dnsget
+will print contents of all received DNS packets (in a readable format),
+while with
+.BR \-vv ,
+it will output all outgoing DNS packets too.
+
+.TP
+.B \-q
+the opposite for \fB\-v\fR -- produce less detailed output.
+With single
+.BR \-q , dnsget
+will only show (decoded) data from final DNS resource records (RR),
+while
+.B \-qq
+also suppresses error messages.
+
+.TP
+\fB\-t \fItype\fR
+request record(s) of the given type \fItype\fR.  By default,
+.B dnsget
+will ask for IPv4 address (A) record, or for PTR record if the
+argument in question is an IPv4 or IPv6 address.  Recognized
+types include A, AAAA, MX, TXT, CNAME, PTR, NS, SOA, ANY and
+others.
+
+.TP
+\fB\-c \fIclass\fR
+request DNS record(s) of the given class \fIclass\fR.  By
+default
+.B dnsget
+uses IN class.  Valid classes include IN, CH, HS, ANY.
+
+.TP
+.B \-a
+(compatibility option).  Equivalent to setting query type to
+.B ANY
+and increasing verbosity level
+.RB ( \-v ).
+
+.TP
+.B \-C
+(planned)
+
+.TP
+.B \-x
+(planned)
+
+.TP
+\fB\-o \fIopt\fR,\fIopt\fR,...
+(may be specified several times).
+Set resolver options (in a form \fIoption\fR:\fIvalue\fR) as if they
+were set in
+.RB $ RES_OPTIONS
+environment variable, or set query flags:
+.RS
+.TP
+\fBtimeout\fR:\fIsec\fR
+Set initial query timeout to \fIsec\fR.
+.TP
+\fBattempts\fR:\fInum\fR
+(re)try every query \fInum\fR times before failing.
+.TP
+\fBudpbuf\fR:\fIbytes\fR
+set DNS UDP buffer size to \fIbytes\fR bytes.  Valid values
+are from 512 to 65535.  If \fIbytes\fR is greather than 512,
+EDNS0 (RFC 2671) extensions will be used.
+.TP
+\fBport\fR:\fInum\fR
+Use given UDP port number \fInum\fR instead of the default port 53 (domain).
+.TP
+\fBaa\fR
+set AA (auth only) query bit.
+.TP
+\fBnord\fR
+do not set RD (recursion desired) query bit (set by default).
+.TP
+\fBdnssec\fR or \fBdo\fR
+set DNSSEC OK (DO) query flag (\fBdnsget\fR does not verify DNSSEC signatures,
+only displays them; this is set in EDNS RR).
+.TP
+\fBcd\fR
+set CD (checking disabled) query bit.
+.RE
+
+.TP
+\fB\-n \fInameserver\fR
+Use the given nameserver(s) (may be specified more than once)
+instead of the default.  Using this option has the same same effect as 
+.RB $ NSCACHEIP
+or
+.RB $ NAMESERVERS
+environment variables, with the only difference that only IPv4 addresses
+are recognized for now, and it is possible to specify names (which will
+be resolved using default settings) instead of IP addresses.
+
+.TP
+.B \-h
+print short help and exit.
+
+.SH "RETURN VALUE"
+When all names where resovled successefully,
+.B dnsget
+exits with zero exit status.  If at least one name was not found,
+.B dnsget
+will exit with return code 100.  If some other error occured during
+name resolution, it will exit with code 99.  In case of usage or
+initialization error,
+.B dnsget
+will return 1.
+
+.SH "SEE ALSO"
+.BR host (1)
+.BR dig (1)
+.BR resolv.conf (5)
+.BR udns (3).

3rdparty/udns/dnsget.c

@@ -0,0 +1,759 @@
+/* dnsget.c
+   simple host/dig-like application using UDNS library
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#ifdef WINDOWS
+#include <windows.h>
+#include <winsock2.h>
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/time.h>
+#include <unistd.h>
+#endif
+#include <time.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "udns.h"
+
+#ifndef HAVE_GETOPT
+# include "getopt.c"
+#endif
+
+#ifndef AF_INET6
+# define AF_INET6 10
+#endif
+
+static char *progname;
+static int verbose = 1;
+static int errors;
+static int notfound;
+
+/* verbosity level:
+ * <0 - bare result
+ *  0 - bare result and error messages
+ *  1 - readable result
+ *  2 - received packet contents and `trying ...' stuff
+ *  3 - sent and received packet contents
+ */
+
+static void die(int errnum, const char *fmt, ...) {
+  va_list ap;
+  fprintf(stderr, "%s: ", progname);
+  va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap);
+  if (errnum) fprintf(stderr, ": %s\n", strerror(errnum));
+  else putc('\n', stderr);
+  fflush(stderr);
+  exit(1);
+}
+
+static const char *dns_xntop(int af, const void *src) {
+  static char buf[6*5+4*4];
+  return dns_ntop(af, src, buf, sizeof(buf));
+}
+
+struct query {
+  const char *name;		/* original query string */
+  unsigned char *dn;		/* the DN being looked up */
+  enum dns_type qtyp;		/* type of the query */
+};
+
+static void query_free(struct query *q) {
+  free(q->dn);
+  free(q);
+}
+
+static struct query *
+query_new(const char *name, const unsigned char *dn, enum dns_type qtyp) {
+  struct query *q = malloc(sizeof(*q));
+  unsigned l = dns_dnlen(dn);
+  unsigned char *cdn = malloc(l);
+  if (!q || !cdn) die(0, "out of memory");
+  memcpy(cdn, dn, l);
+  q->name = name;
+  q->dn = cdn;
+  q->qtyp = qtyp;
+  return q;
+}
+
+static enum dns_class qcls = DNS_C_IN;
+
+static void
+dnserror(struct query *q, int errnum) {
+  if (verbose >= 0)
+    fprintf(stderr, "%s: unable to lookup %s record for %s: %s\n", progname,
+            dns_typename(q->qtyp), dns_dntosp(q->dn), dns_strerror(errnum));
+  if (errnum == DNS_E_NXDOMAIN || errnum == DNS_E_NODATA)
+    ++notfound;
+  else
+    ++errors;
+  query_free(q);
+}
+
+static const unsigned char *
+printtxt(const unsigned char *c) {
+  unsigned n = *c++;
+  const unsigned char *e = c + n;
+  if (verbose > 0) while(c < e) {
+    if (*c < ' ' || *c >= 127) printf("\\%03u", *c);
+    else if (*c == '\\' || *c == '"') printf("\\%c", *c);
+    else putchar(*c);
+    ++c;
+  }
+  else
+   fwrite(c, n, 1, stdout);
+  return e;
+}
+
+static void
+printhex(const unsigned char *c, const unsigned char *e) {
+  while(c < e)
+    printf("%02x", *c++);
+}
+
+static unsigned char to_b64[] =
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static void
+printb64(const unsigned char *c, const unsigned char *e) {
+  while(c < e) {
+    putchar(to_b64[c[0] >> 2]);
+    if (c+1 < e) {
+      putchar(to_b64[(c[0] & 0x3) << 4 | c[1] >> 4]);
+      if (c+2 < e) {
+        putchar(to_b64[(c[1] & 0xf) << 2 | c[2] >> 6]);
+        putchar(to_b64[c[2] & 0x3f]);
+      }
+      else {
+        putchar(to_b64[(c[1] & 0xf) << 2]);
+	putchar('=');
+	break;
+      }
+    }
+    else {
+      putchar(to_b64[(c[0] & 0x3) << 4]);
+      putchar('=');
+      putchar('=');
+      break;
+    }
+    c += 3;
+  }
+}
+
+static void
+printdate(time_t time) {
+  struct tm *tm = gmtime(&time);
+  printf("%04d%02d%02d%02d%02d%02d",
+    tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+    tm->tm_hour, tm->tm_min, tm->tm_sec);
+}
+
+static void
+printrr(const struct dns_parse *p, struct dns_rr *rr) {
+  const unsigned char *pkt = p->dnsp_pkt;
+  const unsigned char *end = p->dnsp_end;
+  const unsigned char *dptr = rr->dnsrr_dptr;
+  const unsigned char *dend = rr->dnsrr_dend;
+  unsigned char *dn = rr->dnsrr_dn;
+  const unsigned char *c;
+  unsigned n;
+
+  if (verbose > 0) {
+    if (verbose > 1) {
+      if (!p->dnsp_rrl && !rr->dnsrr_dn[0] && rr->dnsrr_typ == DNS_T_OPT) {
+        printf(";EDNS%d OPT record (UDPsize: %d, ERcode: %d, Flags: 0x%02x): %d bytes\n",
+               (rr->dnsrr_ttl>>16) & 0xff,	/* version */
+               rr->dnsrr_cls,			/* udp size */
+               (rr->dnsrr_ttl>>24) & 0xff,	/* extended rcode */
+               rr->dnsrr_ttl & 0xffff,		/* flags */
+               rr->dnsrr_dsz);
+        return;
+      }
+      n = printf("%s.", dns_dntosp(rr->dnsrr_dn));
+      printf("%s%u\t%s\t%s\t",
+             n > 15 ? "\t" : n > 7 ? "\t\t" : "\t\t\t",
+             rr->dnsrr_ttl,
+             dns_classname(rr->dnsrr_cls),
+             dns_typename(rr->dnsrr_typ));
+    }
+    else
+      printf("%s. %s ", dns_dntosp(rr->dnsrr_dn), dns_typename(rr->dnsrr_typ));
+  }
+
+  switch(rr->dnsrr_typ) {
+
+  case DNS_T_CNAME:
+  case DNS_T_PTR:
+  case DNS_T_NS:
+  case DNS_T_MB:
+  case DNS_T_MD:
+  case DNS_T_MF:
+  case DNS_T_MG:
+  case DNS_T_MR:
+    if (dns_getdn(pkt, &dptr, end, dn, DNS_MAXDN) <= 0) goto xperr;
+    printf("%s.", dns_dntosp(dn));
+    break;
+
+  case DNS_T_A:
+    if (rr->dnsrr_dsz != 4) goto xperr;
+    printf("%d.%d.%d.%d", dptr[0], dptr[1], dptr[2], dptr[3]);
+    break;
+
+  case DNS_T_AAAA:
+    if (rr->dnsrr_dsz != 16) goto xperr;
+    printf("%s", dns_xntop(AF_INET6, dptr));
+    break;
+
+  case DNS_T_MX:
+    c = dptr + 2;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 || c != dend) goto xperr;
+    printf("%d %s.", dns_get16(dptr), dns_dntosp(dn));
+    break;
+
+  case DNS_T_TXT:
+    /* first verify it */
+    for(c = dptr; c < dend; c += n) {
+      n = *c++;
+      if (c + n > dend) goto xperr;
+    }
+    c = dptr; n = 0;
+    while (c < dend) {
+      if (verbose > 0) printf(n++ ? "\" \"":"\"");
+      c = printtxt(c);
+    }
+    if (verbose > 0) putchar('"');
+    break;
+
+  case DNS_T_HINFO:	/* CPU, OS */
+    c = dptr;
+    n = *c++; if ((c += n) >= dend) goto xperr;
+    n = *c++; if ((c += n) != dend) goto xperr;
+    c = dptr;
+    if (verbose > 0) putchar('"');
+    c = printtxt(c);
+    if (verbose > 0) printf("\" \""); else putchar(' ');
+    printtxt(c);
+    if (verbose > 0) putchar('"');
+    break;
+
+  case DNS_T_WKS:
+    c = dptr;
+    if (dptr + 4 + 2 >= end) goto xperr;
+    printf("%s %d", dns_xntop(AF_INET, dptr), dptr[4]);
+    c = dptr + 5;
+    for (n = 0; c < dend; ++c, n += 8) {
+      if (*c) {
+        unsigned b;
+        for (b = 0; b < 8; ++b)
+          if (*c & (1 << (7-b))) printf(" %d", n + b);
+      }
+    }
+    break;
+
+  case DNS_T_SRV:	/* prio weight port targetDN */
+    c = dptr;
+    c += 2 + 2 + 2;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 || c != dend) goto xperr;
+    c = dptr;
+    printf("%d %d %d %s.",
+           dns_get16(c+0), dns_get16(c+2), dns_get16(c+4),
+           dns_dntosp(dn));
+    break;
+
+  case DNS_T_NAPTR:	/* order pref flags serv regexp repl */
+    c = dptr;
+    c += 4;	/* order, pref */
+    for (n = 0; n < 3; ++n)
+      if (c >= dend) goto xperr;
+      else c += *c + 1;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 || c != dend) goto xperr;
+    c = dptr;
+    printf("%u %u", dns_get16(c+0), dns_get16(c+2));
+    c += 4;
+    for(n = 0; n < 3; ++n) {
+      putchar(' ');
+      if (verbose > 0) putchar('"');
+      c = printtxt(c);
+      if (verbose > 0) putchar('"');
+    } 
+    printf(" %s.", dns_dntosp(dn));
+    break;
+
+  case DNS_T_KEY:
+  case DNS_T_DNSKEY:
+    /* flags(2) proto(1) algo(1) pubkey */
+  case DNS_T_DS:
+  case DNS_T_DLV:
+    /* ktag(2) proto(1) algo(1) pubkey */
+    c = dptr;
+    if (c + 2 + 1 + 1 > dend) goto xperr;
+    printf("%d %d %d", dns_get16(c), c[2], c[3]);
+    c += 2 + 1 + 1;
+    if (c < dend) {
+      putchar(' ');
+      printb64(c, dend);
+    }
+    break;
+
+  case DNS_T_SIG:
+  case DNS_T_RRSIG:
+    /* type(2) algo(1) labels(1) ottl(4) sexp(4) sinc(4) tag(2) sdn sig */
+    c = dptr;
+    c += 2 + 1 + 1 + 4 + 4 + 4 + 2;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0) goto xperr;
+    printf("%s %u %u %u ",
+           dns_typename(dns_get16(dptr)), dptr[2], dptr[3], dns_get32(dptr+4));
+    printdate(dns_get32(dptr+8));
+    putchar(' ');
+    printdate(dns_get32(dptr+12));
+    printf(" %d %s. ", dns_get16(dptr+10), dns_dntosp(dn));
+    printb64(c, dend);
+    break;
+
+  case DNS_T_SSHFP: /* algo(1), fp type(1), fp... */
+    if (dend < dptr + 3) goto xperr;
+    printf("%u %u ", dptr[0], dptr[1]); /* algo, fp type */
+    printhex(dptr + 2, dend);
+    break;
+
+#if 0	/* unused RR types? */
+  case DNS_T_NSEC: /* nextDN bitmaps */
+    c = dptr;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0) goto xperr;
+    printf("%s.", dns_dntosp(dn));
+    unfinished.
+    break;
+#endif
+
+
+  case DNS_T_SOA:
+    c = dptr;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 ||
+        dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 ||
+        c + 4*5 != dend)
+      goto xperr;
+    dns_getdn(pkt, &dptr, end, dn, DNS_MAXDN);
+    printf("%s. ", dns_dntosp(dn));
+    dns_getdn(pkt, &dptr, end, dn, DNS_MAXDN);
+    printf("%s. ", dns_dntosp(dn));
+    printf("%u %u %u %u %u",
+           dns_get32(dptr), dns_get32(dptr+4), dns_get32(dptr+8),
+           dns_get32(dptr+12), dns_get32(dptr+16));
+    break;
+
+  case DNS_T_MINFO:
+    c = dptr;
+    if (dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 ||
+        dns_getdn(pkt, &c, end, dn, DNS_MAXDN) <= 0 ||
+	c != dend)
+      goto xperr;
+    dns_getdn(pkt, &dptr, end, dn, DNS_MAXDN);
+    printf("%s. ", dns_dntosp(dn));
+    dns_getdn(pkt, &dptr, end, dn, DNS_MAXDN);
+    printf("%s.", dns_dntosp(dn));
+    break;
+
+  case DNS_T_NULL:
+  default:
+    printhex(dptr, dend);
+    break;
+  }
+  putchar('\n');
+  return;
+
+xperr:
+  printf("<parse error>\n");
+  ++errors;
+}
+
+static int
+printsection(struct dns_parse *p, int nrr, const char *sname) {
+  struct dns_rr rr;
+  int r;
+  if (!nrr) return 0;
+  if (verbose > 1) printf("\n;; %s section (%d):\n", sname, nrr);
+
+  p->dnsp_rrl = nrr;
+  while((r = dns_nextrr(p, &rr)) > 0)
+    printrr(p, &rr);
+  if (r < 0) printf("<<ERROR>>\n");
+  return r;
+}
+
+/* dbgcb will only be called if verbose > 1 */
+static void
+dbgcb(int code, const struct sockaddr *sa, unsigned slen,
+      const unsigned char *pkt, int r,
+      const struct dns_query *unused_q, void *unused_data) {
+  struct dns_parse p;
+  const unsigned char *cur, *end;
+  int numqd;
+
+  if (code > 0)	{
+    printf(";; trying %s.\n", dns_dntosp(dns_payload(pkt)));
+    printf(";; sending %d bytes query to ", r);
+  }
+  else
+    printf(";; received %d bytes response from ", r);
+  if (sa->sa_family == AF_INET && slen >= sizeof(struct sockaddr_in))
+    printf("%s port %d\n",
+           dns_xntop(AF_INET, &((struct sockaddr_in*)sa)->sin_addr),
+           htons(((struct sockaddr_in*)sa)->sin_port));
+#ifdef HAVE_IPv6
+  else if (sa->sa_family == AF_INET6 && slen >= sizeof(struct sockaddr_in6))
+    printf("%s port %d\n",
+           dns_xntop(AF_INET6, &((struct sockaddr_in6*)sa)->sin6_addr),
+           htons(((struct sockaddr_in6*)sa)->sin6_port));
+#endif
+  else
+    printf("<<unknown socket type %d>>\n", sa->sa_family);
+  if (code > 0 && verbose < 3) {
+    putchar('\n');
+    return;
+  }
+
+  if (code == -2) printf(";; reply from unexpected source\n");
+  if (code == -5) printf(";; reply to a query we didn't sent (or old)\n");
+  if (r < DNS_HSIZE) {
+    printf(";; short packet (%d bytes)\n", r);
+    return;
+  }
+  if (dns_opcode(pkt) != 0)
+    printf(";; unexpected opcode %d\n", dns_opcode(pkt));
+  if (dns_tc(pkt) != 0)
+    printf(";; warning: TC bit set, probably incomplete reply\n");
+
+  printf(";; ->>HEADER<<- opcode: ");
+  switch(dns_opcode(pkt)) {
+  case 0: printf("QUERY"); break;
+  case 1: printf("IQUERY"); break;
+  case 2: printf("STATUS"); break;
+  default: printf("UNKNOWN(%u)", dns_opcode(pkt)); break;
+  }
+  printf(", status: %s, id: %d, size: %d\n;; flags:",
+         dns_rcodename(dns_rcode(pkt)), dns_qid(pkt), r);
+  if (dns_qr(pkt)) printf(" qr");
+  if (dns_aa(pkt)) printf(" aa");
+  if (dns_tc(pkt)) printf(" tc");
+  if (dns_rd(pkt)) printf(" rd");
+  if (dns_ra(pkt)) printf(" ra");
+  /* if (dns_z(pkt))  printf(" z"); only one reserved bit left */
+  if (dns_ad(pkt)) printf(" ad");
+  if (dns_cd(pkt)) printf(" cd");
+  numqd = dns_numqd(pkt);
+  printf("; QUERY: %d, ANSWER: %d, AUTHORITY: %d, ADDITIONAL: %d\n",
+         numqd, dns_numan(pkt), dns_numns(pkt), dns_numar(pkt));
+  if (numqd != 1)
+    printf(";; unexpected number of entries in QUERY section: %d\n",
+           numqd);
+  printf("\n;; QUERY SECTION (%d):\n", numqd);
+  cur = dns_payload(pkt);
+  end = pkt + r;
+  while(numqd--) {
+    if (dns_getdn(pkt, &cur, end, p.dnsp_dnbuf, DNS_MAXDN) <= 0 ||
+        cur + 4 > end) {
+      printf("; invalid query section\n");
+      return;
+    }
+    r = printf(";%s.", dns_dntosp(p.dnsp_dnbuf));
+    printf("%s%s\t%s\n",
+           r > 23 ? "\t" : r > 15 ? "\t\t" : r > 7 ? "\t\t\t" : "\t\t\t\t",
+           dns_classname(dns_get16(cur+2)), dns_typename(dns_get16(cur)));
+    cur += 4;
+  }
+
+  p.dnsp_pkt = pkt;
+  p.dnsp_cur = p.dnsp_ans = cur;
+  p.dnsp_end = end;
+  p.dnsp_qdn = NULL;
+  p.dnsp_qcls = p.dnsp_qtyp = 0;
+  p.dnsp_ttl = 0xffffffffu;
+  p.dnsp_nrr = 0;
+
+  r = printsection(&p, dns_numan(pkt), "ANSWER");
+  if (r == 0)
+    r = printsection(&p, dns_numns(pkt), "AUTHORITY");
+  if (r == 0)
+    r = printsection(&p, dns_numar(pkt), "ADDITIONAL");
+  putchar('\n');
+}
+
+static void dnscb(struct dns_ctx *ctx, void *result, void *data) {
+  int r = dns_status(ctx);
+  struct query *q = data;
+  struct dns_parse p;
+  struct dns_rr rr;
+  unsigned nrr;
+  unsigned char dn[DNS_MAXDN];
+  const unsigned char *pkt, *cur, *end;
+  if (!result) {
+    dnserror(q, r);
+    return;
+  }
+  pkt = result; end = pkt + r; cur = dns_payload(pkt);
+  dns_getdn(pkt, &cur, end, dn, sizeof(dn));
+  dns_initparse(&p, NULL, pkt, cur, end);
+  p.dnsp_qcls = p.dnsp_qtyp = 0;
+  nrr = 0;
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    if (!dns_dnequal(dn, rr.dnsrr_dn)) continue;
+    if ((qcls == DNS_C_ANY || qcls == rr.dnsrr_cls) &&
+        (q->qtyp == DNS_T_ANY || q->qtyp == rr.dnsrr_typ))
+      ++nrr;
+    else if (rr.dnsrr_typ == DNS_T_CNAME && !nrr) {
+      if (dns_getdn(pkt, &rr.dnsrr_dptr, end,
+                    p.dnsp_dnbuf, sizeof(p.dnsp_dnbuf)) <= 0 ||
+          rr.dnsrr_dptr != rr.dnsrr_dend) {
+        r = DNS_E_PROTOCOL;
+        break;
+      }
+      else {
+        if (verbose == 1) {
+          printf("%s.", dns_dntosp(dn));
+          printf(" CNAME %s.\n", dns_dntosp(p.dnsp_dnbuf));
+        }
+        dns_dntodn(p.dnsp_dnbuf, dn, sizeof(dn));
+      }
+    }
+  }
+  if (!r && !nrr)
+    r = DNS_E_NODATA;
+  if (r < 0) {
+    dnserror(q, r);
+    free(result);
+    return;
+  }
+  if (verbose < 2) {	/* else it is already printed by dbgfn */
+    dns_rewind(&p, NULL);
+    p.dnsp_qtyp = q->qtyp == DNS_T_ANY ? 0 : q->qtyp;
+    p.dnsp_qcls = qcls == DNS_C_ANY ? 0 : qcls;
+    while(dns_nextrr(&p, &rr))
+      printrr(&p, &rr);
+  }
+  free(result);
+  query_free(q);
+}
+
+int main(int argc, char **argv) {
+  int i;
+  int fd;
+  fd_set fds;
+  struct timeval tv;
+  time_t now;
+  char *ns[DNS_MAXSERV];
+  int nns = 0;
+  struct query *q;
+  enum dns_type qtyp = 0;
+  struct dns_ctx *nctx = NULL;
+  int flags = 0;
+
+  if (!(progname = strrchr(argv[0], '/'))) progname = argv[0];
+  else argv[0] = ++progname;
+
+  if (argc <= 1)
+    die(0, "try `%s -h' for help", progname);
+
+  if (dns_init(NULL, 0) < 0 || !(nctx = dns_new(NULL)))
+    die(errno, "unable to initialize dns library");
+  /* we keep two dns contexts: one may be needed to resolve
+   * nameservers if given as names, using default options.
+   */
+
+  while((i = getopt(argc, argv, "vqt:c:an:o:f:h")) != EOF) switch(i) {
+  case 'v': ++verbose; break;
+  case 'q': --verbose; break;
+  case 't':
+    if (optarg[0] == '*' && !optarg[1])
+      i = DNS_T_ANY;
+    else if ((i = dns_findtypename(optarg)) <= 0)
+      die(0, "unrecognized query type `%s'", optarg);
+    qtyp = i;
+    break;
+  case 'c':
+    if (optarg[0] == '*' && !optarg[1])
+      i = DNS_C_ANY;
+    else if ((i = dns_findclassname(optarg)) < 0)
+      die(0, "unrecognized query class `%s'", optarg);
+    qcls = i;
+    break;
+  case 'a':
+    qtyp = DNS_T_ANY;
+    ++verbose;
+    break;
+  case 'n':
+    if (nns >= DNS_MAXSERV)
+      die(0, "too many nameservers, %d max", DNS_MAXSERV);
+    ns[nns++] = optarg;
+    break;
+  case 'o':
+  case 'f': {
+    char *opt;
+    const char *const delim = " \t,;";
+    for(opt = strtok(optarg, delim); opt != NULL; opt = strtok(NULL, delim)) {
+      if (dns_set_opts(NULL, optarg) == 0)
+        ;
+      else if (strcmp(opt, "aa") == 0) flags |= DNS_AAONLY;
+      else if (strcmp(optarg, "nord") == 0) flags |= DNS_NORD;
+      else if (strcmp(optarg, "dnssec") == 0) flags |= DNS_SET_DO;
+      else if (strcmp(optarg, "do")     == 0) flags |= DNS_SET_DO;
+      else if (strcmp(optarg, "cd") == 0) flags |= DNS_SET_CD;
+      else
+        die(0, "invalid option: `%s'", opt);
+    }
+    break;
+  }
+  case 'h':
+    printf(
+"%s: simple DNS query tool (using udns version %s)\n"
+"Usage: %s [options] domain-name...\n"
+"where options are:\n"
+" -h - print this help and exit\n"
+" -v - be more verbose\n"
+" -q - be less verbose\n"
+" -t type - set query type (A, AAA, PTR etc)\n"
+" -c class - set query class (IN (default), CH, HS, *)\n"
+" -a - equivalent to -t ANY -v\n"
+" -n ns - use given nameserver(s) instead of default\n"
+"  (may be specified multiple times)\n"
+" -o opt,opt,... (comma- or space-separated list,\n"
+"                 may be specified more than once):\n"
+"  set resovler options (the same as setting $RES_OPTIONS):\n"
+"   timeout:sec  - initial query timeout\n"
+"   attempts:num - number of attempt to resovle a query\n"
+"   ndots:num    - if name has more than num dots, lookup it before search\n"
+"   port:num     - port number for queries instead of default 53\n"
+"   udpbuf:num   - size of UDP buffer (use EDNS0 if >512)\n"
+"  or query flags:\n"
+"   aa,nord,dnssec,do,cd - set query flag (auth-only, no recursion,\n"
+"     enable DNSSEC (DNSSEC Ok), check disabled)\n"
+      , progname, dns_version(), progname);
+    return 0;
+  default:
+    die(0, "try `%s -h' for help", progname);
+  }
+
+  argc -= optind; argv += optind;
+  if (!argc)
+    die(0, "no name(s) to query specified");
+
+  if (nns) {
+    /* if nameservers given as names, resolve them.
+     * We only allow IPv4 nameservers as names for now.
+     * Ok, it is easy enouth to try both AAAA and A,
+     * but the question is what to do by default.
+     */
+    struct sockaddr_in sin;
+    int j, r = 0, opened = 0;
+    memset(&sin, 0, sizeof(sin));
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons(dns_set_opt(NULL, DNS_OPT_PORT, -1));
+    dns_add_serv(NULL, NULL);
+    for(i = 0; i < nns; ++i) {
+      if (dns_pton(AF_INET, ns[i], &sin.sin_addr) <= 0) {
+        struct dns_rr_a4 *rr;
+        if (!opened) {
+          if (dns_open(nctx) < 0)
+            die(errno, "unable to initialize dns context");
+          opened = 1;
+        }
+        rr = dns_resolve_a4(nctx, ns[i], 0);
+        if (!rr)
+          die(0, "unable to resolve nameserver %s: %s",
+              ns[i], dns_strerror(dns_status(nctx)));
+        for(j = 0; j < rr->dnsa4_nrr; ++j) {
+          sin.sin_addr = rr->dnsa4_addr[j];
+          if ((r = dns_add_serv_s(NULL, (struct sockaddr *)&sin)) < 0)
+            break;
+        }
+        free(rr);
+      }
+      else
+        r = dns_add_serv_s(NULL, (struct sockaddr *)&sin);
+      if (r < 0)
+        die(errno, "unable to add nameserver %s",
+             dns_xntop(AF_INET, &sin.sin_addr));
+    }
+  }
+  dns_free(nctx);
+
+  fd = dns_open(NULL);
+  if (fd < 0)
+    die(errno, "unable to initialize dns context");
+
+  if (verbose > 1)
+    dns_set_dbgfn(NULL, dbgcb);
+
+  if (flags)
+    dns_set_opt(NULL, DNS_OPT_FLAGS, flags);
+
+  for (i = 0; i < argc; ++i) {
+    char *name = argv[i];
+    union {
+      struct in_addr addr;
+      struct in6_addr addr6;
+    } a;
+    unsigned char dn[DNS_MAXDN];
+    enum dns_type l_qtyp = 0;
+    int abs;
+    if (dns_pton(AF_INET, name, &a.addr) > 0) {
+      dns_a4todn(&a.addr, 0, dn, sizeof(dn));
+      l_qtyp = DNS_T_PTR;
+      abs = 1;
+    }
+#ifdef HAVE_IPv6
+    else if (dns_pton(AF_INET6, name, &a.addr6) > 0) {
+      dns_a6todn(&a.addr6, 0, dn, sizeof(dn));
+      l_qtyp = DNS_T_PTR;
+      abs = 1;
+    }
+#endif
+    else if (!dns_ptodn(name, strlen(name), dn, sizeof(dn), &abs))
+      die(0, "invalid name `%s'\n", name);
+    else
+      l_qtyp = DNS_T_A;
+    if (qtyp) l_qtyp = qtyp;
+    q = query_new(name, dn, l_qtyp);
+    if (abs) abs = DNS_NOSRCH;
+    if (!dns_submit_dn(NULL, dn, qcls, l_qtyp, abs, 0, dnscb, q))
+      dnserror(q, dns_status(NULL));
+  }
+
+  FD_ZERO(&fds);
+  now = 0;
+  while((i = dns_timeouts(NULL, -1, now)) > 0) {
+    FD_SET(fd, &fds);
+    tv.tv_sec = i;
+    tv.tv_usec = 0;
+    i = select(fd+1, &fds, 0, 0, &tv);
+    now = time(NULL);
+    if (i > 0) dns_ioevent(NULL, now);
+  }
+
+  return errors ? 1 : notfound ? 100 : 0;
+}

3rdparty/udns/ex-rdns.c

@@ -0,0 +1,114 @@
+/* ex-rdns.c
+   parallel rDNS resolver example - read IP addresses from stdin,
+   write domain names to stdout
+ 
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/poll.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <string.h>
+#include "udns.h"
+
+static int curq;
+
+static const char *n2ip(const unsigned char *c) {
+  static char b[sizeof("255.255.255.255")];
+  sprintf(b, "%u.%u.%u.%u", c[0], c[1], c[2], c[3]);
+  return b;
+}
+static void dnscb(struct dns_ctx *ctx, struct dns_rr_ptr *rr, void *data) {
+  const char *ip = n2ip((unsigned char *)&data);
+  int i;
+  --curq;
+  if (rr) {
+    printf("%s", ip);
+    for(i = 0; i < rr->dnsptr_nrr; ++i)
+      printf(" %s", rr->dnsptr_ptr[i]);
+    putchar('\n');
+    free(rr);
+  }
+  else
+    fprintf(stderr, "%s: %s\n", ip, dns_strerror(dns_status(ctx)));
+}
+
+int main(int argc, char **argv) {
+  int c;
+  time_t now;
+  int maxq = 10;
+  struct pollfd pfd;
+  char linebuf[1024];
+  char *eol;
+  int eof;
+
+  if (dns_init(NULL, 1) < 0) {
+    fprintf(stderr, "unable to initialize dns library\n");
+    return 1;
+  }
+  while((c = getopt(argc, argv, "m:r")) != EOF) switch(c) {
+  case 'm': maxq = atoi(optarg); break;
+  case 'r':
+     dns_set_opt(0, DNS_OPT_FLAGS,
+                 dns_set_opt(0, DNS_OPT_FLAGS, -1) | DNS_NORD);
+     break;
+  default: return 1;
+  }
+  if (argc != optind) return 1;
+
+  pfd.fd = dns_sock(0);
+  pfd.events = POLLIN;
+  now = time(NULL);
+  c = optind;
+  eof = 0;
+  while(curq || !eof) {
+    if (!eof && curq < maxq) {
+      union { struct in_addr a; void *p; } pa;
+      if (!fgets(linebuf, sizeof(linebuf), stdin)) {
+        eof = 1;
+        continue;
+      }
+      eol = strchr(linebuf, '\n');
+      if (eol) *eol = '\0';
+      if (!linebuf[0]) continue;
+      if (dns_pton(AF_INET, linebuf, &pa.a) <= 0)
+        fprintf(stderr, "%s: invalid address\n", linebuf);
+      else if (dns_submit_a4ptr(0, &pa.a, dnscb, pa.p) == 0)
+        fprintf(stderr, "%s: unable to submit query: %s\n",
+                linebuf, dns_strerror(dns_status(0)));
+      else
+        ++curq;
+      continue;
+    }
+    if (curq) {
+      c = dns_timeouts(0, -1, now);
+      c = poll(&pfd, 1, c < 0 ? -1 : c * 1000);
+      now = time(NULL);
+      if (c)
+        dns_ioevent(0, now);
+    }
+  }
+  return 0;
+}

3rdparty/udns/getopt.c

@@ -0,0 +1,165 @@
+/* getopt.c
+ * Simple getopt() implementation.
+ *
+ * Standard interface:
+ *  extern int getopt(int argc, char *const *argv, const char *opts);
+ *  extern int optind;    current index in argv[]
+ *  extern char *optarg;  argument for the current option
+ *  extern int optopt;    the current option
+ *  extern int opterr;    to control error printing
+ *
+ * Some minor extensions:
+ *  ignores leading `+' sign in opts[] (unemplemented GNU extension)
+ *  handles optional arguments, in form "x::" in opts[]
+ *  if opts[] starts with `:', will return `:' in case of missing required
+ *    argument, instead of '?'.
+ *
+ * Compile with -DGETOPT_NO_OPTERR to never print errors internally.
+ * Compile with -DGETOPT_NO_STDIO to use write() calls instead of fprintf() for
+ *  error reporting (ignored with -DGETOPT_NO_OPTERR).
+ * Compile with -DGETOPT_CLASS=static to get static linkage.
+ * Compile with -DGETOPT_MY to redefine all visible symbols to be prefixed
+ *  with "my_", like my_getopt instead of getopt.
+ * Compile with -DTEST to get a test executable.
+ *
+ * Written by Michael Tokarev.  Public domain.
+ */
+
+#include <string.h>
+
+#ifndef GETOPT_CLASS
+# define GETOPT_CLASS
+#endif
+#ifdef GETOPT_MY
+# define optarg my_optarg
+# define optind my_optind
+# define opterr my_opterr
+# define optopt my_optopt
+# define getopt my_getopt
+#endif
+
+GETOPT_CLASS char *optarg /* = NULL */;
+GETOPT_CLASS int optind = 1;
+GETOPT_CLASS int opterr = 1;
+GETOPT_CLASS int optopt;
+
+static char *nextc /* = NULL */;
+
+#if defined(GETOPT_NO_OPTERR)
+
+#define printerr(argv, msg)
+
+#elif defined(GETOPT_NO_STDIO)
+
+extern int write(int, void *, int);
+
+static void printerr(char *const *argv, const char *msg) {
+  if (opterr) {
+    char buf[64];
+    unsigned pl = strlen(argv[0]);
+    unsigned ml = strlen(msg);
+    char *p;
+    if (pl + /*": "*/2 + ml + /*" -- c\n"*/6 > sizeof(buf)) {
+      write(2, argv[0], pl);
+      p = buf;
+    }
+    else {
+      memcpy(buf, argv[0], ml);
+      p = buf + pl;
+    }
+    *p++ = ':'; *p++ = ' ';
+    memcpy(p, msg, ml); p += ml;
+    *p++ = ' '; *p++ = '-'; *p++ = '-'; *p++ = ' ';
+    *p++ = optopt;
+    *p++ = '\n';
+    write(2, buf, p - buf);
+  }
+}
+
+#else
+
+#include <stdio.h>
+static void printerr(char *const *argv, const char *msg) {
+  if (opterr)
+     fprintf(stderr, "%s: %s -- %c\n", argv[0], msg, optopt);
+}
+
+#endif
+
+GETOPT_CLASS int getopt(int argc, char *const *argv, const char *opts) {
+  char *p;
+
+  optarg = 0;
+  if (*opts == '+') /* GNU extension (permutation) - isn't supported */
+    ++opts;
+
+  if (!optind) {  /* a way to reset things */
+    nextc = 0;
+    optind = 1;
+  }
+
+  if (!nextc || !*nextc) {   /* advance to the next argv element */
+    /* done scanning? */
+    if (optind >= argc)
+      return -1;
+    /* not an optional argument */
+    if (argv[optind][0] != '-')
+      return -1;
+    /* bare `-' */
+    if (argv[optind][1] == '\0')
+      return -1;
+    /* special case `--' argument */
+    if (argv[optind][1] == '-' && argv[optind][2] == '\0') {
+      ++optind;
+      return -1;
+    }
+    nextc = argv[optind] + 1;
+  }
+
+  optopt = *nextc++;
+  if (!*nextc)
+    ++optind;
+  p = strchr(opts, optopt);
+  if (!p || optopt == ':') {
+    printerr(argv, "illegal option");
+    return '?';
+  }
+  if (p[1] == ':') {
+    if (*nextc) {
+      optarg = nextc;
+      nextc = NULL;
+      ++optind;
+    }
+    else if (p[2] != ':') {	/* required argument */
+      if (optind >= argc) {
+        printerr(argv, "option requires an argument");
+        return *opts == ':' ? ':' : '?';
+      }
+      else
+        optarg = argv[optind++];
+    }
+  }
+  return optopt;
+}
+
+#ifdef TEST
+
+#include <stdio.h>
+
+int main(int argc, char **argv) {
+  int c;
+  while((c = getopt(argc, argv, "ab:c::")) != -1) switch(c) {
+  case 'a':
+  case 'b':
+  case 'c':
+    printf("option %c %s\n", c, optarg ? optarg : "(none)");
+    break;
+  default:
+    return -1;
+  }
+  for(c = optind; c < argc; ++c)
+    printf("non-opt: %s\n", argv[c]);
+  return 0;
+}
+
+#endif

3rdparty/udns/inet_XtoX.c

@@ -0,0 +1,327 @@
+/* inet_XtoX.c
+ * Simple implementation of the following functions:
+ *  inet_ntop(), inet_ntoa(), inet_pton(), inet_aton().
+ *
+ * Differences from traditional implementaitons:
+ *  o modifies destination buffers even on error return.
+ *  o no fancy (hex, or 1.2) input support in inet_aton()
+ *  o inet_aton() does not accept junk after an IP address.
+ *  o inet_ntop(AF_INET) requires at least 16 bytes in dest,
+ *    and inet_ntop(AF_INET6) at least 40 bytes
+ *    (traditional inet_ntop() will try to fit anyway)
+ *
+ * Compile with -Dinet_XtoX_prefix=pfx_ to have pfx_*() instead of inet_*()
+ * Compile with -Dinet_XtoX_no_ntop or -Dinet_XtoX_no_pton
+ *  to disable net2str or str2net conversions.
+ *
+ * #define inet_XtoX_prototypes and #include "this_file.c"
+ * to get function prototypes only (but not for inet_ntoa()).
+ * #define inet_XtoX_decl to be `static' for static visibility,
+ * or use __declspec(dllexport) or somesuch...
+ *
+ * Compile with -DTEST to test against stock implementation.
+ *
+ * Written by Michael Tokarev.  Public domain.
+ */
+
+#ifdef inet_XtoX_prototypes
+
+struct in_addr;
+
+#else
+
+#include <errno.h>
+
+#ifdef TEST
+
+# include <netinet/in.h>
+# include <sys/socket.h>
+# include <arpa/inet.h>
+# include <stdio.h>
+# include <stdlib.h>
+# include <unistd.h>
+# include <string.h>
+# undef inet_XtoX_prefix
+# define inet_XtoX_prefix mjt_inet_
+# undef inet_XtoX_no_ntop
+# undef inet_XtoX_no_pton
+
+#else /* !TEST */
+
+struct in_addr {	/* declare it here to avoid messing with headers */
+  unsigned char x[4];
+};
+
+#endif /* TEST */
+
+#endif /* inet_XtoX_prototypes */
+
+#ifndef inet_XtoX_prefix
+# define inet_XtoX_prefix inet_
+#endif
+#ifndef inet_XtoX_decl
+# define inet_XtoX_decl /*empty*/
+#endif
+
+#define cc2_(x,y) cc2__(x,y)
+#define cc2__(x,y) x##y
+#define fn(x) cc2_(inet_XtoX_prefix,x)
+
+#ifndef inet_XtoX_no_ntop
+
+inet_XtoX_decl const char *
+fn(ntop)(int af, const void *src, char *dst, unsigned size);
+
+#ifndef inet_XtoX_prototypes
+
+static int mjt_ntop4(const void *_src, char *dst, int size) {
+  unsigned i, x, r;
+  char *p;
+  const unsigned char *s = _src;
+  if (size < 4*4)	/* for simplicity, disallow non-max-size buffer */
+    return 0;
+  for (i = 0, p = dst; i < 4; ++i) {
+    if (i) *p++ = '.';
+    x = r = s[i];
+    if (x > 99) { *p++ = (char)(r / 100 + '0'); r %= 100; }
+    if (x > 9) { *p++ = (char)(r / 10 + '0'); r %= 10; }
+    *p++ = (char)(r + '0');
+  }
+  *p = '\0';
+  return 1;
+}
+
+static char *hexc(char *p, unsigned x) {
+  static char hex[16] = "0123456789abcdef";
+  if (x > 0x0fff) *p++ = hex[(x >>12) & 15];
+  if (x > 0x00ff) *p++ = hex[(x >> 8) & 15];
+  if (x > 0x000f) *p++ = hex[(x >> 4) & 15];
+  *p++ = hex[x & 15];
+  return p;
+}
+
+static int mjt_ntop6(const void *_src, char *dst, int size) {
+  unsigned i;
+  unsigned short w[8];
+  unsigned bs = 0, cs = 0;
+  unsigned bl = 0, cl = 0;
+  char *p;
+  const unsigned char *s = _src;
+
+  if (size < 40)	/* for simplicity, disallow non-max-size buffer */
+    return 0;
+
+  for(i = 0; i < 8; ++i, s += 2) {
+    w[i] = (((unsigned short)(s[0])) << 8) | s[1];
+    if (!w[i]) {
+      if (!cl++) cs = i;
+    }
+    else {
+      if (cl > bl) bl = cl, bs = cs;
+    }
+  }
+  if (cl > bl) bl = cl, bs = cs;
+  p = dst;
+  if (bl == 1)
+    bl = 0;
+  if (bl) {
+    for(i = 0; i < bs; ++i) {
+      if (i) *p++ = ':';
+      p = hexc(p, w[i]);
+    }
+    *p++ = ':';
+    i += bl;
+    if (i == 8)
+      *p++ = ':';
+  }
+  else
+    i = 0;
+  for(; i < 8; ++i) {
+    if (i) *p++ = ':';
+    if (i == 6 && !bs && (bl == 6 || (bl == 5 && w[5] == 0xffff)))
+      return mjt_ntop4(s - 4, p, size - (p - dst));
+    p = hexc(p, w[i]);
+  }
+  *p = '\0';
+  return 1;
+}
+
+inet_XtoX_decl const char *
+fn(ntop)(int af, const void *src, char *dst, unsigned size) {
+  switch(af) {
+  /* don't use AF_*: don't mess with headers */
+  case 2:  /* AF_INET */  if (mjt_ntop4(src, dst, size)) return dst; break;
+  case 10: /* AF_INET6 */ if (mjt_ntop6(src, dst, size)) return dst; break;
+  default: errno = EAFNOSUPPORT; return (char*)0;
+  }
+  errno = ENOSPC;
+  return (char*)0;
+}
+
+inet_XtoX_decl const char *
+fn(ntoa)(struct in_addr addr) {
+  static char buf[4*4];
+  mjt_ntop4(&addr, buf, sizeof(buf));
+  return buf;
+}
+
+#endif /* inet_XtoX_prototypes */
+#endif /* inet_XtoX_no_ntop */
+
+#ifndef inet_XtoX_no_pton
+
+inet_XtoX_decl int fn(pton)(int af, const char *src, void *dst);
+inet_XtoX_decl int fn(aton)(const char *src, struct in_addr *addr);
+
+#ifndef inet_XtoX_prototypes
+
+static int mjt_pton4(const char *c, void *dst) {
+  unsigned char *a = dst;
+  unsigned n, o;
+  for (n = 0; n < 4; ++n) {
+    if (*c < '0' || *c > '9')
+      return 0;
+    o = *c++ - '0';
+    while(*c >= '0' && *c <= '9')
+      if ((o = o * 10 + (*c++ - '0')) > 255)
+        return 0;
+    if (*c++ != (n == 3 ? '\0' : '.'))
+      return 0;
+    *a++ = (unsigned char)o;
+  }
+  return 1;
+}
+
+static int mjt_pton6(const char *c, void *dst) {
+  unsigned short w[8], *a = w, *z, *i;
+  unsigned v, o;
+  const char *sc;
+  unsigned char *d = dst;
+  if (*c != ':') z = (unsigned short*)0;
+  else if (*++c != ':') return 0;
+  else ++c, z = a;
+  i = 0;
+  for(;;) {
+    v = 0;
+    sc = c;
+    for(;;) {
+      if (*c >= '0' && *c <= '9') o = *c - '0';
+      else if (*c >= 'a' && *c <= 'f') o = *c - 'a' + 10;
+      else if (*c >= 'A' && *c <= 'F') o = *c - 'A' + 10;
+      else break;
+      v = (v << 4) | o;
+      if (v > 0xffff) return 0;
+      ++c;
+    }
+    if (sc == c) {
+      if (z == a && !*c)
+        break;
+      else
+        return 0;
+    }
+    if (*c == ':') {
+      if (a >= w + 8)
+        return 0;
+      *a++ = v;
+      if (*++c == ':') {
+        if (z)
+          return 0;
+        z = a;
+        if (!*++c)
+          break;
+      }
+    }
+    else if (!*c) {
+      if (a >= w + 8)
+        return 0;
+      *a++ = v;
+      break;
+    }
+    else if (*c == '.') {
+      if (a > w + 6)
+        return 0;
+      if (!mjt_pton4(sc, d))
+        return 0;
+      *a++ = ((unsigned)(d[0]) << 8) | d[1];
+      *a++ = ((unsigned)(d[2]) << 8) | d[3];
+      break;
+    }
+    else
+      return 0;
+  }
+  v = w + 8 - a;
+  if ((v && !z) || (!v && z))
+    return 0;
+  for(i = w; ; ++i) {
+    if (i == z)
+      while(v--) { *d++ = '\0'; *d++ = '\0'; }
+    if (i >= a)
+      break;
+    *d++ = (unsigned char)((*i >> 8) & 255);
+    *d++ = (unsigned char)(*i & 255);
+  }
+  return 1;
+}
+
+inet_XtoX_decl int fn(pton)(int af, const char *src, void *dst) {
+  switch(af) {
+  /* don't use AF_*: don't mess with headers */
+  case 2  /* AF_INET  */: return mjt_pton4(src, dst);
+  case 10 /* AF_INET6 */: return mjt_pton6(src, dst);
+  default: errno = EAFNOSUPPORT; return -1;
+  }
+}
+
+inet_XtoX_decl int fn(aton)(const char *src, struct in_addr *addr) {
+  return mjt_pton4(src, addr);
+}
+
+#endif /* inet_XtoX_prototypes */
+
+#endif /* inet_XtoX_no_pton */
+
+#ifdef TEST
+
+int main(int argc, char **argv) {
+  int i;
+  char n0[16], n1[16];
+  char p0[64], p1[64];
+  int af = AF_INET;
+  int pl = sizeof(p0);
+  int r0, r1;
+  const char *s0, *s1;
+
+  while((i = getopt(argc, argv, "46a:p:")) != EOF) switch(i) {
+  case '4': af = AF_INET;  break;
+  case '6': af = AF_INET6; break;
+  case 'a': case 'p': pl = atoi(optarg); break;
+  default: return 1;
+  }
+  for(i = optind; i < argc; ++i) {
+    char *a = argv[i];
+
+    printf("%s:\n", a);
+    r0 = inet_pton(af, a, n0);
+    printf(" p2n stock: %s\n",
+     (r0 < 0 ? "(notsupp)" : !r0 ? "(inval)" : fn(ntop)(af,n0,p0,sizeof(p0))));
+    r1 = fn(pton)(af, a, n1);
+    printf(" p2n this : %s\n",
+     (r1 < 0 ? "(notsupp)" : !r1 ? "(inval)" : fn(ntop)(af,n1,p1,sizeof(p1))));
+
+    if ((r0 > 0) != (r1 > 0) ||
+        (r0 > 0 && r1 > 0 && memcmp(n0, n1, af == AF_INET ? 4 : 16) != 0))
+      printf(" DIFFER!\n");
+
+    s0 = inet_ntop(af, n1, p0, pl);
+    printf(" n2p stock: %s\n", s0 ? s0 : "(inval)");
+    s1 = fn(ntop)(af, n1, p1, pl);
+    printf(" n2p this : %s\n", s1 ? s1 : "(inval)");
+    if ((s0 != 0) != (s1 != 0) ||
+        (s0 && s1 && strcmp(s0, s1) != 0))
+      printf(" DIFFER!\n");
+
+  }
+  return 0;
+}
+
+#endif /* TEST */

3rdparty/udns/rblcheck.1

@@ -0,0 +1,151 @@
+.\" rblcheck.1
+.\" rblckeck manpage
+.\"
+.\" Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+.\" This file is part of UDNS library, an async DNS stub resolver.
+.\"
+.\" This library is free software; you can redistribute it and/or
+.\" modify it under the terms of the GNU Lesser General Public
+.\" License as published by the Free Software Foundation; either
+.\" version 2.1 of the License, or (at your option) any later version.
+.\"
+.\" This library is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+.\" Lesser General Public License for more details.
+.\"
+.\" You should have received a copy of the GNU Lesser General Public
+.\" License along with this library, in file named COPYING.LGPL; if not,
+.\" write to the Free Software Foundation, Inc., 59 Temple Place,
+.\" Suite 330, Boston, MA  02111-1307  USA
+
+.TH rblckeck 1 "Apr 2005" "User Utilities"
+
+.SH NAME
+rblckeck \- DNSBL lookup utility
+
+.SH SYNOPSYS
+.B rblcheck
+.RB [\| \-s
+.IR zone \|]
+.RB [\| \-S
+.IR zone\-file \|]
+.RB [\| \-c \|]
+.RB [\| \-tmvq \|]
+.RB [\| \-n
+.IR nsaddr \|]
+.IR address \|.\|.\|.
+
+.SH DESCRIPTION
+.B rblcheck
+is a simple command-line to perform DNSBL (DNS-based blocklists) lookups.
+For every IP address (or a name, in which case it will be resolved to an
+address first), the utility verifies whenever it is listed in a (list of)
+DNS blocklists specified with
+.B \-s
+or
+.B \-S
+options, optionally obtains text assotiated with the listing (usually it
+is either some description about the reason of the listing or an URL
+referring to such a description), and displays results on standard output.
+.PP
+The program is implemented on top of
+.BR udns (3)
+library.
+
+.SH OPTIONS
+
+The following options are recognized by
+.BR rblcheck :
+
+.TP
+.B \-s \fIzone\fR
+add the given \fIzone\fR DNSBL name to the list of active zones.
+.TP
+.B \-S \fIzone-file\fR
+add list of zones from the named \fIzone-file\fR to the list of
+active zones (the file specifies one zone as the first word on a
+line, empty lines and lines starting with `#' character are ignored).
+.TP
+.B \-c
+reset active zone list.
+.TP
+.B \-v
+be more verbose, produce more detailed output.
+.TP
+.B \-q
+the opposite for \fB\-v\fR -- produce less detailed output.
+.TP
+.B \-t
+obtain text for listed addresses.
+.TP
+.B \-n \fInsaddr\fR
+Use the given nameserver (given as IPv4 or IPv6 address) instead of the
+default.  The same effect may be achieved by setting $NSCACHEIP environment
+variable.
+.TP
+.B \-m
+stop after first hit, ie after the first address which is found to be
+listed.
+
+.TP
+.B \-h
+print short help and exit.
+
+.PP
+If no
+.BR \-s ,
+.BR \-S
+and
+.B \-c
+options are given,
+.B rblcheck
+will try to obtain list of zones using $RBLCHECK_ZONES environment variable,
+or ~/.rblcheckrc, or /etc/rblckechrc files, in that order.  If no zones are
+found, it will exit unsuccessefully.
+
+.SH "RETURN VALUE"
+When no addresses given are listed and no errors occured,
+.B rblcheck
+exits with code 0.  If at least one address is listed,
+.B rblcheck
+returns 100.  In case of DNS errors,
+.B rblcheck
+returns 2.
+
+.SH ENVIRONMENT
+
+.TP
+.B $RBLCHECK_ZONES
+if no
+.BR \-s ,
+.B \-S
+or
+.B \-c
+option is given,
+.B rblcheck
+tries this variable to obtain list of DNSBL zones to check against.
+
+.SH FILES
+
+.TP
+$HOME/.rblcheckrc and /etc/rblcheckrc
+if no
+.BR \-s ,
+.B \-S
+or
+.B \-c
+option is given, and no $RBLCHECK_ZONES environment variable is set,
+.B rblcheck
+will try the two files (the first one that exists) to obtain list of
+DNSBL zones to check against.
+Each line specifies one zone (only first word in each line is used).
+Empty lines and lines starting with `#' character are ignored.
+
+.SH "SEE ALSO"
+.BR dnsget (1)
+.BR resolv.conf (5)
+.BR udns (3).
+
+.SH AUTHOR
+This program and manual pages are written by Michael Tokarev.

3rdparty/udns/rblcheck.c

@@ -0,0 +1,378 @@
+/* rblcheck.c
+   dnsbl (rbl) checker application
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef WINDOWS
+# include <winsock2.h>
+#else
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/socket.h>
+# include <netinet/in.h>
+#endif
+#include <time.h>
+#include <errno.h>
+#include <stdarg.h>
+#include "udns.h"
+
+#ifndef HAVE_GETOPT
+# include "getopt.c"
+#endif
+
+static const char *version = "udns-rblcheck 0.4";
+static char *progname;
+
+static void error(int die, const char *fmt, ...) {
+  va_list ap;
+  fprintf(stderr, "%s: ", progname);
+  va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap);
+  putc('\n', stderr);
+  fflush(stderr);
+  if (die)
+    exit(1);
+}
+
+struct rblookup {
+  struct ipcheck *parent;
+  struct in_addr key;
+  const char *zone;
+  struct dns_rr_a4  *addr;
+  struct dns_rr_txt *txt;
+};
+
+struct ipcheck {
+  const char *name;
+  int naddr;
+  int listed;
+  struct rblookup *lookup;
+};
+
+#define notlisted ((void*)1)
+
+static int nzones, nzalloc;
+static const char **zones;
+
+static int do_txt;
+static int stopfirst;
+static int verbose = 1;
+/* verbosity level:
+ * <0 - only bare As/TXTs
+ * 0 - what RBL result
+ * 1(default) - what is listed by RBL: result
+ * 2          - what is[not ]listed by RBL: result, name lookups
+ */
+
+static int listed;
+static int failures;
+
+static void *ecalloc(int size, int cnt) {
+  void *t = calloc(size, cnt);
+  if (!t)
+    error(1, "out of memory");
+  return t;
+}
+
+static void addzone(const char *zone) {
+  if (nzones >= nzalloc) {
+    const char **zs = (const char**)ecalloc(sizeof(char*), (nzalloc += 16));
+    if (zones) {
+      memcpy(zs, zones, nzones * sizeof(char*));
+      free(zones);
+    }
+    zones = zs;
+  }
+  zones[nzones++] = zone;
+}
+
+static int addzonefile(const char *fname) {
+  FILE *f = fopen(fname, "r");
+  char linebuf[2048];
+  if (!f)
+    return 0;
+  while(fgets(linebuf, sizeof(linebuf), f)) {
+    char *p = linebuf, *e;
+    while(*p == ' ' || *p == '\t') ++p;
+    if (*p == '#' || *p == '\n') continue;
+    e = p;
+    while(*e && *e != ' ' && *e != '\t' && *e != '\n')
+      ++e;
+    *e++ = '\0';
+    p = memcpy(ecalloc(e - p, 1), p, e - p); // strdup
+    addzone(p);
+  }
+  fclose(f);
+  return 1;
+}
+
+static void dnserror(struct rblookup *ipl, const char *what) {
+  char buf[4*4];
+  error(0, "unable to %s for %s (%s): %s",
+          what, dns_ntop(AF_INET, &ipl->key, buf, sizeof(buf)),
+          ipl->zone, dns_strerror(dns_status(0)));
+  ++failures;
+}
+
+static void display_result(struct ipcheck *ipc) {
+  int j;
+  struct rblookup *l, *le;
+  char buf[4*4];
+  if (!ipc->naddr) return;
+  for (l = ipc->lookup, le = l + nzones * ipc->naddr; l < le; ++l) {
+    if (!l->addr) continue;
+    if (verbose < 2 && l->addr == notlisted) continue;
+    if (verbose >= 0) {
+      dns_ntop(AF_INET, &l->key, buf, sizeof(buf));
+      if (ipc->name) printf("%s[%s]", ipc->name, buf);
+      else printf("%s", buf);
+    }
+    if (l->addr == notlisted) {
+      printf(" is NOT listed by %s\n", l->zone);
+      continue;
+    }
+    else if (verbose >= 1)
+      printf(" is listed by %s: ", l->zone);
+    else if (verbose >= 0)
+      printf(" %s ", l->zone);
+    if (verbose >= 1 || !do_txt)
+      for (j = 0; j < l->addr->dnsa4_nrr; ++j)
+        printf("%s%s", j ? " " : "",
+               dns_ntop(AF_INET, &l->addr->dnsa4_addr[j], buf, sizeof(buf)));
+    if (!do_txt) ;
+    else if (l->txt) {
+      for(j = 0; j < l->txt->dnstxt_nrr; ++j) {
+        unsigned char *t = l->txt->dnstxt_txt[j].txt;
+        unsigned char *e = t + l->txt->dnstxt_txt[j].len;
+        printf("%s\"", verbose > 0 ? "\n\t" : j ? " " : "");
+        while(t < e) {
+          if (*t < ' ' || *t >= 127) printf("\\x%02x", *t);
+          else if (*t == '\\' || *t == '"') printf("\\%c", *t);
+          else putchar(*t);
+          ++t;
+        }
+        putchar('"');
+      }
+      free(l->txt);
+    }
+    else
+      printf("%s<no text available>", verbose > 0 ? "\n\t" : "");
+    free(l->addr);
+    putchar('\n');
+  }
+  free(ipc->lookup);
+}
+
+static void txtcb(struct dns_ctx *ctx, struct dns_rr_txt *r, void *data) {
+  struct rblookup *ipl = data;
+  if (r) {
+    ipl->txt = r;
+    ++ipl->parent->listed;
+  }
+  else if (dns_status(ctx) != DNS_E_NXDOMAIN)
+    dnserror(ipl, "lookup DNSBL TXT record");
+}
+
+static void a4cb(struct dns_ctx *ctx, struct dns_rr_a4 *r, void *data) {
+  struct rblookup *ipl = data;
+  if (r) {
+    ipl->addr = r;
+    ++listed;
+    if (do_txt) {
+      if (dns_submit_a4dnsbl_txt(0, &ipl->key, ipl->zone, txtcb, ipl))
+        return;
+      dnserror(ipl, "submit DNSBL TXT record");
+    }
+    ++ipl->parent->listed;
+  }
+  else if (dns_status(ctx) != DNS_E_NXDOMAIN)
+    dnserror(ipl, "lookup DNSBL A record");
+  else
+    ipl->addr = notlisted;
+}
+
+static int
+submit_a_queries(struct ipcheck *ipc,
+                 int naddr, const struct in_addr *addr) {
+  int z, a;
+  struct rblookup *rl = ecalloc(sizeof(*rl), nzones * naddr);
+  ipc->lookup = rl;
+  ipc->naddr = naddr;
+  for(a = 0; a < naddr; ++a) {
+    for(z = 0; z < nzones; ++z) {
+      rl->key = addr[a];
+      rl->zone = zones[z];
+      rl->parent = ipc;
+      if (!dns_submit_a4dnsbl(0, &rl->key, rl->zone, a4cb, rl))
+        dnserror(rl, "submit DNSBL A query");
+      ++rl;
+    }
+  }
+  return 0;
+}
+
+static void namecb(struct dns_ctx *ctx, struct dns_rr_a4 *rr, void *data) {
+  struct ipcheck *ipc = data;
+  if (rr) {
+    submit_a_queries(ipc, rr->dnsa4_nrr, rr->dnsa4_addr);
+    free(rr);
+  }
+  else {
+    error(0, "unable to lookup `%s': %s",
+          ipc->name, dns_strerror(dns_status(ctx)));
+    ++failures;
+  }
+}
+
+static int submit(struct ipcheck *ipc) {
+  struct in_addr addr;
+  if (dns_pton(AF_INET, ipc->name, &addr) > 0) {
+    submit_a_queries(ipc, 1, &addr);
+    ipc->name = NULL;
+  }
+  else if (!dns_submit_a4(0, ipc->name, 0, namecb, ipc)) {
+    error(0, "unable to submit name query for %s: %s\n",
+          ipc->name, dns_strerror(dns_status(0)));
+    ++failures;
+  }
+  return 0;
+}
+
+static void waitdns(struct ipcheck *ipc) {
+  struct timeval tv;
+  fd_set fds;
+  int c;
+  int fd = dns_sock(NULL);
+  time_t now = 0;
+  FD_ZERO(&fds);
+  while((c = dns_timeouts(NULL, -1, now)) > 0) {
+    FD_SET(fd, &fds);
+    tv.tv_sec = c;
+    tv.tv_usec = 0;
+    c = select(fd+1, &fds, NULL, NULL, &tv);
+    now = time(NULL);
+    if (c > 0)
+      dns_ioevent(NULL, now);
+    if (stopfirst && ipc->listed)
+      break;
+  }
+}
+
+int main(int argc, char **argv) {
+  int c;
+  struct ipcheck ipc;
+  char *nameserver = NULL;
+  int zgiven = 0;
+
+  if (!(progname = strrchr(argv[0], '/'))) progname = argv[0];
+  else argv[0] = ++progname;
+
+  while((c = getopt(argc, argv, "hqtvms:S:cn:")) != EOF) switch(c) {
+  case 's': ++zgiven; addzone(optarg); break;
+  case 'S':
+    ++zgiven;
+    if (addzonefile(optarg)) break;
+    error(1, "unable to read zonefile `%s'", optarg);
+  case 'c': ++zgiven; nzones = 0; break;
+  case 'q': --verbose; break;
+  case 'v': ++verbose; break;
+  case 't': do_txt = 1; break;
+  case 'n': nameserver = optarg; break;
+  case 'm': ++stopfirst; break;
+  case 'h':
+    printf("%s: %s (udns library version %s).\n",
+           progname, version, dns_version());
+    printf("Usage is: %s [options] address..\n", progname);
+    printf(
+"Where options are:\n"
+" -h - print this help and exit\n"
+" -s service - add the service (DNSBL zone) to the serice list\n"
+" -S service-file - add the DNSBL zone(s) read from the given file\n"
+" -c - clear service list\n"
+" -v - increase verbosity level (more -vs => more verbose)\n"
+" -q - decrease verbosity level (opposite of -v)\n"
+" -t - obtain and print TXT records if any\n"
+" -m - stop checking after first address match in any list\n"
+" -n ipaddr - use the given nameserver instead of the default\n"
+"(if no -s or -S option is given, use $RBLCHECK_ZONES, ~/.rblcheckrc\n"
+"or /etc/rblcheckrc in that order)\n"
+    );
+    return 0;
+  default:
+    error(1, "use `%s -h' for help", progname);
+  }
+
+  if (!zgiven) {
+    char *s = getenv("RBLCHECK_ZONES");
+    if (s) {
+      char *k;
+      s = strdup(s);
+      for(k = strtok(s, " \t"); k; k = strtok(NULL, " \t"))
+        addzone(k);
+      free(s);
+    }
+    else {	/* probably worthless on windows? */
+      char *path;
+      char *home = getenv("HOME");
+      if (!home) home = ".";
+      path = malloc(strlen(home) + 1 + sizeof(".rblcheckrc"));
+      sprintf(path, "%s/.rblcheckrc", home);
+      if (!addzonefile(path))
+        addzonefile("/etc/rblcheckrc");
+      free(path);
+    }
+  }
+  if (!nzones)
+    error(1, "no service (zone) list specified (-s or -S option)");
+
+  argv += optind;
+  argc -= optind;
+
+  if (!argc)
+    return 0;
+
+  if (dns_init(NULL, 0) < 0)
+    error(1, "unable to initialize DNS library: %s", strerror(errno));
+  if (nameserver) {
+    dns_add_serv(NULL, NULL);
+    if (dns_add_serv(NULL, nameserver) < 0)
+      error(1, "wrong IP address for a nameserver: `%s'", nameserver);
+  }
+  if (dns_open(NULL) < 0)
+    error(1, "unable to initialize DNS library: %s", strerror(errno));
+
+  for (c = 0; c < argc; ++c) {
+    if (c && (verbose > 1 || (verbose == 1 && do_txt))) putchar('\n');
+    memset(&ipc, 0, sizeof(ipc));
+    ipc.name = argv[c];
+    submit(&ipc);
+    waitdns(&ipc);
+    display_result(&ipc);
+    if (stopfirst > 1 && listed) break;
+  }
+
+  return listed ? 100 : failures ? 2 : 0;
+}

3rdparty/udns/udns.h

@@ -0,0 +1,778 @@
+/* udns.h
+   header file for the UDNS library.
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#ifndef UDNS_VERSION	/* include guard */
+
+#define UDNS_VERSION "0.4"
+
+#ifdef WINDOWS
+# ifdef UDNS_DYNAMIC_LIBRARY
+#  ifdef DNS_LIBRARY_BUILD
+#   define UDNS_API __declspec(dllexport)
+#   define UDNS_DATA_API __declspec(dllexport)
+#  else
+#   define UDNS_API __declspec(dllimport)
+#   define UDNS_DATA_API __declspec(dllimport)
+#  endif
+# endif
+#endif
+
+#ifndef UDNS_API
+# define UDNS_API
+#endif
+#ifndef UDNS_DATA_API
+# define UDNS_DATA_API
+#endif
+
+#include <sys/types.h>		/* for time_t */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* forward declarations if sockets stuff isn't #include'd */
+struct in_addr;
+struct in6_addr;
+struct sockaddr;
+
+/**************************************************************************/
+/**************** Common definitions **************************************/
+
+UDNS_API const char *
+dns_version(void);
+
+struct dns_ctx;
+struct dns_query;
+
+/* shorthand for [const] unsigned char */
+typedef unsigned char dnsc_t;
+typedef const unsigned char dnscc_t;
+
+#define DNS_MAXDN	255	/* max DN length */
+#define DNS_DNPAD	1	/* padding for DN buffers */
+#define DNS_MAXLABEL	63	/* max DN label length */
+#define DNS_MAXNAME	1024	/* max asciiz domain name length */
+#define DNS_HSIZE	12	/* DNS packet header size */
+#define DNS_PORT	53	/* default domain port */
+#define DNS_MAXSERV	6	/* max servers to consult */
+#define DNS_MAXPACKET	512	/* max traditional-DNS UDP packet size */
+#define DNS_EDNS0PACKET	4096	/* EDNS0 packet size to use */
+
+enum dns_class {	/* DNS RR Classes */
+  DNS_C_INVALID	= 0,	/* invalid class */
+  DNS_C_IN	= 1,	/* Internet */
+  DNS_C_CH	= 3,	/* CHAOS */
+  DNS_C_HS	= 4,	/* HESIOD */
+  DNS_C_ANY	= 255	/* wildcard */
+};
+
+enum dns_type {		/* DNS RR Types */
+  DNS_T_INVALID		= 0,	/* Cookie. */
+  DNS_T_A		= 1,	/* Host address. */
+  DNS_T_NS		= 2,	/* Authoritative server. */
+  DNS_T_MD		= 3,	/* Mail destination. */
+  DNS_T_MF		= 4,	/* Mail forwarder. */
+  DNS_T_CNAME		= 5,	/* Canonical name. */
+  DNS_T_SOA		= 6,	/* Start of authority zone. */
+  DNS_T_MB		= 7,	/* Mailbox domain name. */
+  DNS_T_MG		= 8,	/* Mail group member. */
+  DNS_T_MR		= 9,	/* Mail rename name. */
+  DNS_T_NULL		= 10,	/* Null resource record. */
+  DNS_T_WKS		= 11,	/* Well known service. */
+  DNS_T_PTR		= 12,	/* Domain name pointer. */
+  DNS_T_HINFO		= 13,	/* Host information. */
+  DNS_T_MINFO		= 14,	/* Mailbox information. */
+  DNS_T_MX		= 15,	/* Mail routing information. */
+  DNS_T_TXT		= 16,	/* Text strings. */
+  DNS_T_RP		= 17,	/* Responsible person. */
+  DNS_T_AFSDB		= 18,	/* AFS cell database. */
+  DNS_T_X25		= 19,	/* X_25 calling address. */
+  DNS_T_ISDN		= 20,	/* ISDN calling address. */
+  DNS_T_RT		= 21,	/* Router. */
+  DNS_T_NSAP		= 22,	/* NSAP address. */
+  DNS_T_NSAP_PTR	= 23,	/* Reverse NSAP lookup (deprecated). */
+  DNS_T_SIG		= 24,	/* Security signature. */
+  DNS_T_KEY		= 25,	/* Security key. */
+  DNS_T_PX		= 26,	/* X.400 mail mapping. */
+  DNS_T_GPOS		= 27,	/* Geographical position (withdrawn). */
+  DNS_T_AAAA		= 28,	/* Ip6 Address. */
+  DNS_T_LOC		= 29,	/* Location Information. */
+  DNS_T_NXT		= 30,	/* Next domain (security). */
+  DNS_T_EID		= 31,	/* Endpoint identifier. */
+  DNS_T_NIMLOC		= 32,	/* Nimrod Locator. */
+  DNS_T_SRV		= 33,	/* Server Selection. */
+  DNS_T_ATMA		= 34,	/* ATM Address */
+  DNS_T_NAPTR		= 35,	/* Naming Authority PoinTeR */
+  DNS_T_KX		= 36,	/* Key Exchange */
+  DNS_T_CERT		= 37,	/* Certification record */
+  DNS_T_A6		= 38,	/* IPv6 address (deprecates AAAA) */
+  DNS_T_DNAME		= 39,	/* Non-terminal DNAME (for IPv6) */
+  DNS_T_SINK		= 40,	/* Kitchen sink (experimentatl) */
+  DNS_T_OPT		= 41,	/* EDNS0 option (meta-RR) */
+  DNS_T_DS		= 43,	/* DNSSEC */
+  DNS_T_SSHFP		= 44,
+  DNS_T_IPSECKEY	= 45,
+  DNS_T_RRSIG		= 46,	/* DNSSEC */
+  DNS_T_NSEC		= 47,	/* DNSSEC */
+  DNS_T_DNSKEY		= 48,
+  DNS_T_DHCID		= 49,
+  DNS_T_NSEC3		= 50,
+  DNS_T_NSEC3PARAMS	= 51,
+  DNS_T_TALINK		= 58, /* draft-ietf-dnsop-trust-history */
+  DNS_T_SPF		= 99,
+  DNS_T_UINFO		= 100,
+  DNS_T_UID		= 101,
+  DNS_T_GID		= 102,
+  DNS_T_UNSPEC		= 103,
+  DNS_T_TSIG		= 250,	/* Transaction signature. */
+  DNS_T_IXFR		= 251,	/* Incremental zone transfer. */
+  DNS_T_AXFR		= 252,	/* Transfer zone of authority. */
+  DNS_T_MAILB		= 253,	/* Transfer mailbox records. */
+  DNS_T_MAILA		= 254,	/* Transfer mail agent records. */
+  DNS_T_ANY		= 255,	/* Wildcard match. */
+  DNS_T_ZXFR		= 256,	/* BIND-specific, nonstandard. */
+  DNS_T_DLV		= 32769, /* RFC 4431, 5074, DNSSEC Lookaside Validation */
+  DNS_T_MAX		= 65536
+};
+
+/**************************************************************************/
+/**************** Domain Names (DNs) **************************************/
+
+/* return length of the DN */
+UDNS_API unsigned
+dns_dnlen(dnscc_t *dn);
+
+/* return #of labels in a DN */
+UDNS_API unsigned
+dns_dnlabels(dnscc_t *dn);
+
+/* lower- and uppercase single DN char */
+#define DNS_DNLC(c) ((c) >= 'A' && (c) <= 'Z' ? (c) - 'A' + 'a' : (c))
+#define DNS_DNUC(c) ((c) >= 'a' && (c) <= 'z' ? (c) - 'a' + 'A' : (c))
+
+/* compare the DNs, return dnlen of equal or 0 if not */
+UDNS_API unsigned
+dns_dnequal(dnscc_t *dn1, dnscc_t *dn2);
+
+/* copy one DN to another, size checking */
+UDNS_API unsigned
+dns_dntodn(dnscc_t *sdn, dnsc_t *ddn, unsigned ddnsiz);
+
+/* convert asciiz string of length namelen (0 to use strlen) to DN */
+UDNS_API int
+dns_ptodn(const char *name, unsigned namelen,
+          dnsc_t *dn, unsigned dnsiz, int *isabs);
+
+/* simpler form of dns_ptodn() */
+#define dns_sptodn(name,dn,dnsiz) dns_ptodn((name),0,(dn),(dnsiz),0)
+
+UDNS_DATA_API extern dnscc_t dns_inaddr_arpa_dn[14];
+#define DNS_A4RSIZE	30
+UDNS_API int
+dns_a4todn(const struct in_addr *addr, dnscc_t *tdn,
+           dnsc_t *dn, unsigned dnsiz);
+UDNS_API int
+dns_a4ptodn(const struct in_addr *addr, const char *tname,
+            dnsc_t *dn, unsigned dnsiz);
+UDNS_API dnsc_t *
+dns_a4todn_(const struct in_addr *addr, dnsc_t *dn, dnsc_t *dne);
+
+UDNS_DATA_API extern dnscc_t dns_ip6_arpa_dn[10];
+#define DNS_A6RSIZE	74
+UDNS_API int
+dns_a6todn(const struct in6_addr *addr, dnscc_t *tdn,
+           dnsc_t *dn, unsigned dnsiz);
+UDNS_API int
+dns_a6ptodn(const struct in6_addr *addr, const char *tname,
+            dnsc_t *dn, unsigned dnsiz);
+UDNS_API dnsc_t *
+dns_a6todn_(const struct in6_addr *addr, dnsc_t *dn, dnsc_t *dne);
+
+/* convert DN into asciiz string */
+UDNS_API int
+dns_dntop(dnscc_t *dn, char *name, unsigned namesiz);
+
+/* convert DN into asciiz string, using static buffer (NOT thread-safe!) */
+UDNS_API const char *
+dns_dntosp(dnscc_t *dn);
+
+/* return buffer size (incl. null byte) required for asciiz form of a DN */
+UDNS_API unsigned
+dns_dntop_size(dnscc_t *dn);
+
+/* either wrappers or reimplementations for inet_ntop() and inet_pton() */
+UDNS_API const char *dns_ntop(int af, const void *src, char *dst, int size);
+UDNS_API int dns_pton(int af, const char *src, void *dst);
+
+/**************************************************************************/
+/**************** DNS raw packet layout ***********************************/
+
+enum dns_rcode {	/* reply codes */
+  DNS_R_NOERROR		= 0,	/* ok, no error */
+  DNS_R_FORMERR		= 1,	/* format error */
+  DNS_R_SERVFAIL	= 2,	/* server failed */
+  DNS_R_NXDOMAIN	= 3,	/* domain does not exists */
+  DNS_R_NOTIMPL		= 4,	/* not implemented */
+  DNS_R_REFUSED		= 5,	/* query refused */
+  /* these are for BIND_UPDATE */
+  DNS_R_YXDOMAIN	= 6,	/* Name exists */
+  DNS_R_YXRRSET		= 7,	/* RRset exists */
+  DNS_R_NXRRSET		= 8,	/* RRset does not exist */
+  DNS_R_NOTAUTH		= 9,	/* Not authoritative for zone */
+  DNS_R_NOTZONE		= 10,	/* Zone of record different from zone section */
+  /*ns_r_max = 11,*/
+  /* The following are TSIG extended errors */
+  DNS_R_BADSIG		= 16,
+  DNS_R_BADKEY		= 17,
+  DNS_R_BADTIME		= 18
+};
+
+static __inline unsigned dns_get16(dnscc_t *s) {
+  return ((unsigned)s[0]<<8) | s[1];
+}
+static __inline unsigned dns_get32(dnscc_t *s) {
+  return ((unsigned)s[0]<<24) | ((unsigned)s[1]<<16)
+        | ((unsigned)s[2]<<8) | s[3];
+}
+static __inline dnsc_t *dns_put16(dnsc_t *d, unsigned n) {
+  *d++ = (dnsc_t)((n >> 8) & 255); *d++ = (dnsc_t)(n & 255); return d;
+}
+static __inline dnsc_t *dns_put32(dnsc_t *d, unsigned n) {
+  *d++ = (dnsc_t)((n >> 24) & 255); *d++ = (dnsc_t)((n >> 16) & 255);
+  *d++ = (dnsc_t)((n >>  8) & 255); *d++ = (dnsc_t)(n & 255);
+  return d;
+}
+
+/* DNS Header layout */
+enum {
+ /* bytes 0:1 - query ID */
+  DNS_H_QID1	= 0,
+  DNS_H_QID2	= 1,
+  DNS_H_QID	= DNS_H_QID1,
+#define dns_qid(pkt)	dns_get16((pkt)+DNS_H_QID)
+ /* byte 2: flags1 */
+  DNS_H_F1	= 2,
+  DNS_HF1_QR	= 0x80,	/* query response flag */
+#define dns_qr(pkt)	((pkt)[DNS_H_F1]&DNS_HF1_QR)
+  DNS_HF1_OPCODE = 0x78, /* opcode, 0 = query */
+#define dns_opcode(pkt)	(((pkt)[DNS_H_F1]&DNS_HF1_OPCODE)>>3)
+  DNS_HF1_AA	= 0x04,	/* auth answer */
+#define dns_aa(pkt)	((pkt)[DNS_H_F1]&DNS_HF1_AA)
+  DNS_HF1_TC	= 0x02,	/* truncation flag */
+#define dns_tc(pkt)	((pkt)[DNS_H_F1]&DNS_HF1_TC)
+  DNS_HF1_RD	= 0x01,	/* recursion desired (may be set in query) */
+#define dns_rd(pkt)	((pkt)[DNS_H_F1]&DNS_HF1_RD)
+ /* byte 3: flags2 */
+  DNS_H_F2	= 3,
+  DNS_HF2_RA	= 0x80,	/* recursion available */
+#define dns_ra(pkt)	((pkt)[DNS_H_F2]&DNS_HF2_RA)
+  DNS_HF2_Z	= 0x40,	/* reserved */
+  DNS_HF2_AD	= 0x20, /* DNSSEC: authentic data */
+#define dns_ad(pkt)	((pkt)[DNS_H_F2]&DNS_HF2_AD)
+  DNS_HF2_CD	= 0x10, /* DNSSEC: checking disabled */
+#define dns_cd(pkt)	((pkt)[DNS_H_F2]&DNS_HF2_CD)
+  DNS_HF2_RCODE	= 0x0f,	/* response code, DNS_R_XXX above */
+#define dns_rcode(pkt)	((pkt)[DNS_H_F2]&DNS_HF2_RCODE)
+ /* bytes 4:5: qdcount, numqueries */
+  DNS_H_QDCNT1	= 4,
+  DNS_H_QDCNT2	= 5,
+  DNS_H_QDCNT	= DNS_H_QDCNT1,
+#define dns_numqd(pkt)	dns_get16((pkt)+4)
+ /* bytes 6:7: ancount, numanswers */
+  DNS_H_ANCNT1	= 6,
+  DNS_H_ANCNT2	= 7,
+  DNS_H_ANCNT	= DNS_H_ANCNT1,
+#define dns_numan(pkt)	dns_get16((pkt)+6)
+ /* bytes 8:9: nscount, numauthority */
+  DNS_H_NSCNT1	= 8,
+  DNS_H_NSCNT2	= 9,
+  DNS_H_NSCNT	= DNS_H_NSCNT1,
+#define dns_numns(pkt)	dns_get16((pkt)+8)
+ /* bytes 10:11: arcount, numadditional */
+  DNS_H_ARCNT1	= 10,
+  DNS_H_ARCNT2	= 11,
+  DNS_H_ARCNT	= DNS_H_ARCNT1,
+#define dns_numar(pkt)	dns_get16((pkt)+10)
+#define dns_payload(pkt) ((pkt)+DNS_HSIZE)
+  /* EDNS0 (OPT RR) flags (Ext. Flags) */
+  DNS_EF1_DO	= 0x80, /* DNSSEC OK */
+};
+
+/* packet buffer: start at pkt, end before pkte, current pos *curp.
+ * extract a DN and set *curp to the next byte after DN in packet.
+ * return -1 on error, 0 if dnsiz is too small, or dnlen on ok.
+ */
+UDNS_API int
+dns_getdn(dnscc_t *pkt, dnscc_t **curp, dnscc_t *end,
+          dnsc_t *dn, unsigned dnsiz);
+
+/* skip the DN at position cur in packet ending before pkte,
+ * return pointer to the next byte after the DN or NULL on error */
+UDNS_API dnscc_t *
+dns_skipdn(dnscc_t *end, dnscc_t *cur);
+
+struct dns_rr {		/* DNS Resource Record */
+  dnsc_t dnsrr_dn[DNS_MAXDN];	/* the DN of the RR */
+  enum dns_class dnsrr_cls;	/* Class */
+  enum dns_type  dnsrr_typ;	/* Type */
+  unsigned dnsrr_ttl;		/* Time-To-Live (TTL) */
+  unsigned dnsrr_dsz;		/* data size */
+  dnscc_t *dnsrr_dptr;		/* pointer to start of data */
+  dnscc_t *dnsrr_dend;		/* past end of data */
+};
+
+struct dns_parse {	/* RR/packet parsing state */
+  dnscc_t *dnsp_pkt;		/* start of the packet */
+  dnscc_t *dnsp_end;		/* end of the packet */
+  dnscc_t *dnsp_cur;		/* current packet position */
+  dnscc_t *dnsp_ans;		/* start of answer section */
+  int dnsp_rrl;			/* number of RRs left to go */
+  int dnsp_nrr;			/* RR count so far */
+  unsigned dnsp_ttl;		/* TTL value so far */
+  dnscc_t *dnsp_qdn;		/* the RR DN we're looking for */
+  enum dns_class dnsp_qcls;	/* RR class we're looking for or 0 */
+  enum dns_type  dnsp_qtyp;	/* RR type we're looking for or 0 */
+  dnsc_t dnsp_dnbuf[DNS_MAXDN];	/* domain buffer */
+};
+
+/* initialize the parse structure */
+UDNS_API void
+dns_initparse(struct dns_parse *p, dnscc_t *qdn,
+              dnscc_t *pkt, dnscc_t *cur, dnscc_t *end);
+
+/* search next RR, <0=error, 0=no more RRs, >0 = found. */
+UDNS_API int
+dns_nextrr(struct dns_parse *p, struct dns_rr *rr);
+
+UDNS_API void
+dns_rewind(struct dns_parse *p, dnscc_t *qdn);
+
+
+/**************************************************************************/
+/**************** Resolver Context ****************************************/
+
+/* default resolver context */
+UDNS_DATA_API extern struct dns_ctx dns_defctx;
+
+/* reset resolver context to default state, close it if open, drop queries */
+UDNS_API void
+dns_reset(struct dns_ctx *ctx);
+
+/* reset resolver context and read in system configuration */
+UDNS_API int
+dns_init(struct dns_ctx *ctx, int do_open);
+
+/* return new resolver context with the same settings as copy */
+UDNS_API struct dns_ctx *
+dns_new(const struct dns_ctx *copy);
+
+/* free resolver context returned by dns_new(); all queries are dropped */
+UDNS_API void
+dns_free(struct dns_ctx *ctx);
+
+/* add nameserver for a resolver context (or reset nslist if serv==NULL) */
+UDNS_API int
+dns_add_serv(struct dns_ctx *ctx, const char *serv);
+
+/* add nameserver using struct sockaddr structure (with ports) */
+UDNS_API int
+dns_add_serv_s(struct dns_ctx *ctx, const struct sockaddr *sa);
+
+/* add search list element for a resolver context (or reset it if srch==NULL) */
+UDNS_API int
+dns_add_srch(struct dns_ctx *ctx, const char *srch);
+
+/* set options for a resolver context */
+UDNS_API int
+dns_set_opts(struct dns_ctx *ctx, const char *opts);
+
+enum dns_opt {		/* options */
+  DNS_OPT_FLAGS,	/* flags, DNS_F_XXX */
+  DNS_OPT_TIMEOUT,	/* timeout in secounds */
+  DNS_OPT_NTRIES,	/* number of retries */
+  DNS_OPT_NDOTS,	/* ndots */
+  DNS_OPT_UDPSIZE,	/* EDNS0 UDP size */
+  DNS_OPT_PORT,		/* port to use */
+};
+
+/* set or get (if val<0) an option */
+UDNS_API int
+dns_set_opt(struct dns_ctx *ctx, enum dns_opt opt, int val);
+
+enum dns_flags {
+  DNS_NOSRCH	= 0x00010000,	/* do not perform search */
+  DNS_NORD	= 0x00020000,	/* request no recursion */
+  DNS_AAONLY	= 0x00040000,	/* set AA flag in queries */
+  DNS_SET_DO	= 0x00080000,	/* set EDNS0 "DO" bit (DNSSEC OK) */
+  DNS_SET_CD	= 0x00100000,	/* set CD bit (DNSSEC: checking disabled) */
+};
+
+/* set the debug function pointer */
+typedef void
+(dns_dbgfn)(int code, const struct sockaddr *sa, unsigned salen,
+            dnscc_t *pkt, int plen,
+            const struct dns_query *q, void *data);
+UDNS_API void
+dns_set_dbgfn(struct dns_ctx *ctx, dns_dbgfn *dbgfn);
+
+/* open and return UDP socket */
+UDNS_API int
+dns_open(struct dns_ctx *ctx);
+
+/* return UDP socket or -1 if not open */
+UDNS_API int
+dns_sock(const struct dns_ctx *ctx);
+
+/* close the UDP socket */
+UDNS_API void
+dns_close(struct dns_ctx *ctx);
+
+/* return number of requests queued */
+UDNS_API int
+dns_active(const struct dns_ctx *ctx);
+
+/* return status of the last operation */
+UDNS_API int
+dns_status(const struct dns_ctx *ctx);
+UDNS_API void
+dns_setstatus(struct dns_ctx *ctx, int status);
+
+/* handle I/O event on UDP socket */
+UDNS_API void
+dns_ioevent(struct dns_ctx *ctx, time_t now);
+
+/* process any timeouts, return time in secounds to the
+ * next timeout (or -1 if none) but not greather than maxwait */
+UDNS_API int
+dns_timeouts(struct dns_ctx *ctx, int maxwait, time_t now);
+
+/* define timer requesting routine to use */
+typedef void dns_utm_fn(struct dns_ctx *ctx, int timeout, void *data);
+UDNS_API void
+dns_set_tmcbck(struct dns_ctx *ctx, dns_utm_fn *fn, void *data);
+
+/**************************************************************************/
+/**************** Making Queries ******************************************/
+
+/* query callback routine */
+typedef void dns_query_fn(struct dns_ctx *ctx, void *result, void *data);
+
+/* query parse routine: raw DNS => application structure */
+typedef int
+dns_parse_fn(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+             void **res);
+
+enum dns_status {
+  DNS_E_NOERROR		= 0,	/* ok, not an error */
+  DNS_E_TEMPFAIL	= -1,	/* timeout, SERVFAIL or similar */
+  DNS_E_PROTOCOL	= -2,	/* got garbled reply */
+  DNS_E_NXDOMAIN	= -3,	/* domain does not exists */
+  DNS_E_NODATA		= -4,	/* domain exists but no data of reqd type */
+  DNS_E_NOMEM		= -5,	/* out of memory while processing */
+  DNS_E_BADQUERY	= -6	/* the query is malformed */
+};
+
+/* submit generic DN query */
+UDNS_API struct dns_query *
+dns_submit_dn(struct dns_ctx *ctx,
+              dnscc_t *dn, int qcls, int qtyp, int flags,
+              dns_parse_fn *parse, dns_query_fn *cbck, void *data);
+/* submit generic name query */
+UDNS_API struct dns_query *
+dns_submit_p(struct dns_ctx *ctx,
+             const char *name, int qcls, int qtyp, int flags,
+             dns_parse_fn *parse, dns_query_fn *cbck, void *data);
+
+/* cancel the given async query in progress */
+UDNS_API int
+dns_cancel(struct dns_ctx *ctx, struct dns_query *q);
+
+/* resolve a generic query, return the answer */
+UDNS_API void *
+dns_resolve_dn(struct dns_ctx *ctx,
+               dnscc_t *qdn, int qcls, int qtyp, int flags,
+               dns_parse_fn *parse);
+UDNS_API void *
+dns_resolve_p(struct dns_ctx *ctx,
+              const char *qname, int qcls, int qtyp, int flags,
+              dns_parse_fn *parse);
+UDNS_API void *
+dns_resolve(struct dns_ctx *ctx, struct dns_query *q);
+
+
+/* Specific RR handlers */
+
+#define dns_rr_common(prefix)						\
+  char *prefix##_cname;		/* canonical name */			\
+  char *prefix##_qname;		/* original query name */		\
+  unsigned prefix##_ttl;	/* TTL value */				\
+  int prefix##_nrr		/* number of records */
+
+struct dns_rr_null {		/* NULL RRset, aka RRset template */
+  dns_rr_common(dnsn);
+};
+
+UDNS_API int
+dns_stdrr_size(const struct dns_parse *p);
+UDNS_API void *
+dns_stdrr_finish(struct dns_rr_null *ret, char *cp, const struct dns_parse *p);
+
+struct dns_rr_a4 {		/* the A RRset */
+  dns_rr_common(dnsa4);
+  struct in_addr *dnsa4_addr;	/* array of addresses, naddr elements */
+};
+
+UDNS_API dns_parse_fn dns_parse_a4;	/* A RR parsing routine */
+typedef void				/* A query callback routine */
+dns_query_a4_fn(struct dns_ctx *ctx, struct dns_rr_a4 *result, void *data);
+
+/* submit A IN query */
+UDNS_API struct dns_query *
+dns_submit_a4(struct dns_ctx *ctx, const char *name, int flags,
+              dns_query_a4_fn *cbck, void *data);
+
+/* resolve A IN query */
+UDNS_API struct dns_rr_a4 *
+dns_resolve_a4(struct dns_ctx *ctx, const char *name, int flags);
+
+
+struct dns_rr_a6 {		/* the AAAA RRset */
+  dns_rr_common(dnsa6);
+  struct in6_addr *dnsa6_addr;	/* array of addresses, naddr elements */
+};
+
+UDNS_API dns_parse_fn dns_parse_a6;	/* A RR parsing routine */
+typedef void				/* A query callback routine */
+dns_query_a6_fn(struct dns_ctx *ctx, struct dns_rr_a6 *result, void *data);
+
+/* submit AAAA IN query */
+UDNS_API struct dns_query *
+dns_submit_a6(struct dns_ctx *ctx, const char *name, int flags,
+              dns_query_a6_fn *cbck, void *data);
+
+/* resolve AAAA IN query */
+UDNS_API struct dns_rr_a6 *
+dns_resolve_a6(struct dns_ctx *ctx, const char *name, int flags);
+
+
+struct dns_rr_ptr {		/* the PTR RRset */
+  dns_rr_common(dnsptr);
+  char **dnsptr_ptr;		/* array of PTRs */
+};
+
+UDNS_API dns_parse_fn dns_parse_ptr;	/* PTR RR parsing routine */
+typedef void				/* PTR query callback */
+dns_query_ptr_fn(struct dns_ctx *ctx, struct dns_rr_ptr *result, void *data);
+/* submit PTR IN in-addr.arpa query */
+UDNS_API struct dns_query *
+dns_submit_a4ptr(struct dns_ctx *ctx, const struct in_addr *addr,
+                 dns_query_ptr_fn *cbck, void *data);
+/* resolve PTR IN in-addr.arpa query */
+UDNS_API struct dns_rr_ptr *
+dns_resolve_a4ptr(struct dns_ctx *ctx, const struct in_addr *addr);
+
+/* the same as above, but for ip6.arpa */
+UDNS_API struct dns_query *
+dns_submit_a6ptr(struct dns_ctx *ctx, const struct in6_addr *addr,
+                 dns_query_ptr_fn *cbck, void *data);
+UDNS_API struct dns_rr_ptr *
+dns_resolve_a6ptr(struct dns_ctx *ctx, const struct in6_addr *addr);
+
+
+struct dns_mx {		/* single MX RR */
+  int priority;		/* MX priority */
+  char *name;		/* MX name */
+};
+struct dns_rr_mx {		/* the MX RRset */
+  dns_rr_common(dnsmx);
+  struct dns_mx *dnsmx_mx;	/* array of MXes */
+};
+UDNS_API dns_parse_fn dns_parse_mx;	/* MX RR parsing routine */
+typedef void				/* MX RR callback */
+dns_query_mx_fn(struct dns_ctx *ctx, struct dns_rr_mx *result, void *data);
+/* submit MX IN query */
+UDNS_API struct dns_query *
+dns_submit_mx(struct dns_ctx *ctx, const char *name, int flags,
+              dns_query_mx_fn *cbck, void *data);
+/* resolve MX IN query */
+UDNS_API struct dns_rr_mx *
+dns_resolve_mx(struct dns_ctx *ctx, const char *name, int flags);
+
+
+struct dns_txt {	/* single TXT record */
+  int len;		/* length of the text */
+  dnsc_t *txt;	/* pointer to text buffer. May contain nulls. */
+};
+struct dns_rr_txt {		/* the TXT RRset */
+  dns_rr_common(dnstxt);
+  struct dns_txt *dnstxt_txt;	/* array of TXT records */
+};
+UDNS_API dns_parse_fn dns_parse_txt;	/* TXT RR parsing routine */
+typedef void				/* TXT RR callback */
+dns_query_txt_fn(struct dns_ctx *ctx, struct dns_rr_txt *result, void *data);
+/* submit TXT query */
+UDNS_API struct dns_query *
+dns_submit_txt(struct dns_ctx *ctx, const char *name, int qcls, int flags,
+               dns_query_txt_fn *cbck, void *data);
+/* resolve TXT query */
+UDNS_API struct dns_rr_txt *
+dns_resolve_txt(struct dns_ctx *ctx, const char *name, int qcls, int flags);
+
+
+struct dns_srv {	/* single SRV RR */
+  int priority;		/* SRV priority */
+  int weight;		/* SRV weight */
+  int port;		/* SRV port */
+  char *name;		/* SRV name */
+};
+struct dns_rr_srv {		/* the SRV RRset */
+  dns_rr_common(dnssrv);
+  struct dns_srv *dnssrv_srv;	/* array of SRVes */
+};
+UDNS_API dns_parse_fn dns_parse_srv;	/* SRV RR parsing routine */
+typedef void				/* SRV RR callback */
+dns_query_srv_fn(struct dns_ctx *ctx, struct dns_rr_srv *result, void *data);
+/* submit SRV IN query */
+UDNS_API struct dns_query *
+dns_submit_srv(struct dns_ctx *ctx,
+               const char *name, const char *srv, const char *proto,
+               int flags, dns_query_srv_fn *cbck, void *data);
+/* resolve SRV IN query */
+UDNS_API struct dns_rr_srv *
+dns_resolve_srv(struct dns_ctx *ctx,
+                const char *name, const char *srv, const char *proto,
+                int flags);
+
+/* NAPTR (RFC3403) RR type */
+struct dns_naptr {	/* single NAPTR RR */
+  int order;		/* NAPTR order */
+  int preference;	/* NAPTR preference */
+  char *flags;		/* NAPTR flags */
+  char *service;	/* NAPTR service */
+  char *regexp;		/* NAPTR regexp */
+  char *replacement;	/* NAPTR replacement */
+};
+
+struct dns_rr_naptr {		/* the NAPTR RRset */
+  dns_rr_common(dnsnaptr);
+  struct dns_naptr *dnsnaptr_naptr;	/* array of NAPTRes */
+};
+UDNS_API dns_parse_fn dns_parse_naptr;	/* NAPTR RR parsing routine */
+typedef void				/* NAPTR RR callback */
+dns_query_naptr_fn(struct dns_ctx *ctx,
+                   struct dns_rr_naptr *result, void *data);
+/* submit NAPTR IN query */
+UDNS_API struct dns_query *
+dns_submit_naptr(struct dns_ctx *ctx, const char *name, int flags,
+                 dns_query_naptr_fn *cbck, void *data);
+/* resolve NAPTR IN query */
+UDNS_API struct dns_rr_naptr *
+dns_resolve_naptr(struct dns_ctx *ctx, const char *name, int flags);
+
+
+UDNS_API struct dns_query *
+dns_submit_a4dnsbl(struct dns_ctx *ctx,
+                   const struct in_addr *addr, const char *dnsbl,
+                   dns_query_a4_fn *cbck, void *data);
+UDNS_API struct dns_query *
+dns_submit_a4dnsbl_txt(struct dns_ctx *ctx,
+                       const struct in_addr *addr, const char *dnsbl,
+                       dns_query_txt_fn *cbck, void *data);
+UDNS_API struct dns_rr_a4 *
+dns_resolve_a4dnsbl(struct dns_ctx *ctx,
+                    const struct in_addr *addr, const char *dnsbl);
+UDNS_API struct dns_rr_txt *
+dns_resolve_a4dnsbl_txt(struct dns_ctx *ctx,
+                        const struct in_addr *addr, const char *dnsbl);
+
+UDNS_API struct dns_query *
+dns_submit_a6dnsbl(struct dns_ctx *ctx,
+                   const struct in6_addr *addr, const char *dnsbl,
+                   dns_query_a4_fn *cbck, void *data);
+UDNS_API struct dns_query *
+dns_submit_a6dnsbl_txt(struct dns_ctx *ctx,
+                       const struct in6_addr *addr, const char *dnsbl,
+                       dns_query_txt_fn *cbck, void *data);
+UDNS_API struct dns_rr_a4 *
+dns_resolve_a6dnsbl(struct dns_ctx *ctx,
+                    const struct in6_addr *addr, const char *dnsbl);
+UDNS_API struct dns_rr_txt *
+dns_resolve_a6dnsbl_txt(struct dns_ctx *ctx,
+                        const struct in6_addr *addr, const char *dnsbl);
+
+UDNS_API struct dns_query *
+dns_submit_rhsbl(struct dns_ctx *ctx,
+                 const char *name, const char *rhsbl,
+                 dns_query_a4_fn *cbck, void *data);
+UDNS_API struct dns_query *
+dns_submit_rhsbl_txt(struct dns_ctx *ctx,
+                     const char *name, const char *rhsbl,
+                     dns_query_txt_fn *cbck, void *data);
+UDNS_API struct dns_rr_a4 *
+dns_resolve_rhsbl(struct dns_ctx *ctx, const char *name, const char *rhsbl);
+UDNS_API struct dns_rr_txt *
+dns_resolve_rhsbl_txt(struct dns_ctx *ctx, const char *name, const char *rhsbl);
+
+/**************************************************************************/
+/**************** Names, Names ********************************************/
+
+struct dns_nameval {
+  int val;
+  const char *name;
+};
+
+UDNS_DATA_API extern const struct dns_nameval dns_classtab[];
+UDNS_DATA_API extern const struct dns_nameval dns_typetab[];
+UDNS_DATA_API extern const struct dns_nameval dns_rcodetab[];
+UDNS_API int
+dns_findname(const struct dns_nameval *nv, const char *name);
+#define dns_findclassname(cls) dns_findname(dns_classtab, (cls))
+#define dns_findtypename(type) dns_findname(dns_typetab, (type))
+#define dns_findrcodename(rcode) dns_findname(dns_rcodetab, (rcode))
+
+UDNS_API const char *dns_classname(enum dns_class cls);
+UDNS_API const char *dns_typename(enum dns_type type);
+UDNS_API const char *dns_rcodename(enum dns_rcode rcode);
+const char *_dns_format_code(char *buf, const char *prefix, int code);
+
+UDNS_API const char *dns_strerror(int errnum);
+
+/* simple pseudo-random number generator, code by Bob Jenkins */
+
+struct udns_jranctx {	/* the context */
+  unsigned a, b, c, d;
+};
+
+/* initialize the RNG with a given seed */
+UDNS_API void
+udns_jraninit(struct udns_jranctx *x, unsigned seed);
+
+/* return next random number.  32bits on most platforms so far. */
+UDNS_API unsigned
+udns_jranval(struct udns_jranctx *x);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif	/* include guard */

3rdparty/udns/udns_XtoX.c

@@ -0,0 +1,50 @@
+/* udns_XtoX.c
+   udns_ntop() and udns_pton() routines, which are either
+     - wrappers for inet_ntop() and inet_pton() or
+     - reimplementations of those routines.
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include "udns.h"
+
+#ifdef HAVE_INET_PTON_NTOP
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+const char *dns_ntop(int af, const void *src, char *dst, int size) {
+  return inet_ntop(af, src, dst, size);
+}
+
+int dns_pton(int af, const char *src, void *dst) {
+  return inet_pton(af, src, dst);
+}
+
+#else
+#define inet_XtoX_no_ntop
+#define inet_XtoX_prefix dns_
+#include "inet_XtoX.c"
+
+#endif

3rdparty/udns/udns_bl.c

@@ -0,0 +1,160 @@
+/* udns_bl.c
+   DNSBL stuff
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include "udns.h"
+#ifndef NULL
+# define NULL 0
+#endif
+
+struct dns_query *
+dns_submit_a4dnsbl(struct dns_ctx *ctx,
+                   const struct in_addr *addr, const char *dnsbl,
+                   dns_query_a4_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  if (dns_a4ptodn(addr, dnsbl, dn, sizeof(dn)) <= 0) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_A, DNS_NOSRCH,
+                  dns_parse_a4, (dns_query_fn*)cbck, data);
+}
+
+struct dns_query *
+dns_submit_a4dnsbl_txt(struct dns_ctx *ctx,
+                       const struct in_addr *addr, const char *dnsbl,
+                       dns_query_txt_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  if (dns_a4ptodn(addr, dnsbl, dn, sizeof(dn)) <= 0) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_TXT, DNS_NOSRCH,
+                  dns_parse_txt, (dns_query_fn*)cbck, data);
+}
+
+struct dns_rr_a4 *
+dns_resolve_a4dnsbl(struct dns_ctx *ctx,
+                    const struct in_addr *addr, const char *dnsbl) {
+  return (struct dns_rr_a4 *)
+    dns_resolve(ctx, dns_submit_a4dnsbl(ctx, addr, dnsbl, 0, 0));
+}
+
+struct dns_rr_txt *
+dns_resolve_a4dnsbl_txt(struct dns_ctx *ctx,
+                        const struct in_addr *addr, const char *dnsbl) {
+  return (struct dns_rr_txt *)
+    dns_resolve(ctx, dns_submit_a4dnsbl_txt(ctx, addr, dnsbl, 0, 0));
+}
+
+
+struct dns_query *
+dns_submit_a6dnsbl(struct dns_ctx *ctx,
+                   const struct in6_addr *addr, const char *dnsbl,
+                   dns_query_a4_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  if (dns_a6ptodn(addr, dnsbl, dn, sizeof(dn)) <= 0) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_A, DNS_NOSRCH,
+                  dns_parse_a4, (dns_query_fn*)cbck, data);
+}
+
+struct dns_query *
+dns_submit_a6dnsbl_txt(struct dns_ctx *ctx,
+                       const struct in6_addr *addr, const char *dnsbl,
+                       dns_query_txt_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  if (dns_a6ptodn(addr, dnsbl, dn, sizeof(dn)) <= 0) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_TXT, DNS_NOSRCH,
+                  dns_parse_txt, (dns_query_fn*)cbck, data);
+}
+
+struct dns_rr_a4 *
+dns_resolve_a6dnsbl(struct dns_ctx *ctx,
+                    const struct in6_addr *addr, const char *dnsbl) {
+  return (struct dns_rr_a4 *)
+    dns_resolve(ctx, dns_submit_a6dnsbl(ctx, addr, dnsbl, 0, 0));
+}
+
+struct dns_rr_txt *
+dns_resolve_a6dnsbl_txt(struct dns_ctx *ctx,
+                        const struct in6_addr *addr, const char *dnsbl) {
+  return (struct dns_rr_txt *)
+    dns_resolve(ctx, dns_submit_a6dnsbl_txt(ctx, addr, dnsbl, 0, 0));
+}
+
+static int
+dns_rhsbltodn(const char *name, const char *rhsbl, dnsc_t dn[DNS_MAXDN])
+{
+  int l = dns_sptodn(name, dn, DNS_MAXDN);
+  if (l <= 0) return 0;
+  l = dns_sptodn(rhsbl, dn+l-1, DNS_MAXDN-l+1);
+  if (l <= 0) return 0;
+  return 1;
+}
+
+struct dns_query *
+dns_submit_rhsbl(struct dns_ctx *ctx, const char *name, const char *rhsbl,
+                 dns_query_a4_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  if (!dns_rhsbltodn(name, rhsbl, dn)) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_A, DNS_NOSRCH,
+                  dns_parse_a4, (dns_query_fn*)cbck, data);
+}
+struct dns_query *
+dns_submit_rhsbl_txt(struct dns_ctx *ctx, const char *name, const char *rhsbl,
+                     dns_query_txt_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  if (!dns_rhsbltodn(name, rhsbl, dn)) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_TXT, DNS_NOSRCH,
+                  dns_parse_txt, (dns_query_fn*)cbck, data);
+}
+
+struct dns_rr_a4 *
+dns_resolve_rhsbl(struct dns_ctx *ctx, const char *name, const char *rhsbl) {
+  return (struct dns_rr_a4*)
+    dns_resolve(ctx, dns_submit_rhsbl(ctx, name, rhsbl, 0, 0));
+}
+
+struct dns_rr_txt *
+dns_resolve_rhsbl_txt(struct dns_ctx *ctx, const char *name, const char *rhsbl)
+{
+  return (struct dns_rr_txt*)
+    dns_resolve(ctx, dns_submit_rhsbl_txt(ctx, name, rhsbl, 0, 0));
+}

3rdparty/udns/udns_codes.c

@@ -0,0 +1,199 @@
+/* Automatically generated. */
+#include "udns.h"
+
+const struct dns_nameval dns_typetab[] = {
+ {DNS_T_INVALID,"INVALID"},
+ {DNS_T_A,"A"},
+ {DNS_T_NS,"NS"},
+ {DNS_T_MD,"MD"},
+ {DNS_T_MF,"MF"},
+ {DNS_T_CNAME,"CNAME"},
+ {DNS_T_SOA,"SOA"},
+ {DNS_T_MB,"MB"},
+ {DNS_T_MG,"MG"},
+ {DNS_T_MR,"MR"},
+ {DNS_T_NULL,"NULL"},
+ {DNS_T_WKS,"WKS"},
+ {DNS_T_PTR,"PTR"},
+ {DNS_T_HINFO,"HINFO"},
+ {DNS_T_MINFO,"MINFO"},
+ {DNS_T_MX,"MX"},
+ {DNS_T_TXT,"TXT"},
+ {DNS_T_RP,"RP"},
+ {DNS_T_AFSDB,"AFSDB"},
+ {DNS_T_X25,"X25"},
+ {DNS_T_ISDN,"ISDN"},
+ {DNS_T_RT,"RT"},
+ {DNS_T_NSAP,"NSAP"},
+ {DNS_T_NSAP_PTR,"NSAP_PTR"},
+ {DNS_T_SIG,"SIG"},
+ {DNS_T_KEY,"KEY"},
+ {DNS_T_PX,"PX"},
+ {DNS_T_GPOS,"GPOS"},
+ {DNS_T_AAAA,"AAAA"},
+ {DNS_T_LOC,"LOC"},
+ {DNS_T_NXT,"NXT"},
+ {DNS_T_EID,"EID"},
+ {DNS_T_NIMLOC,"NIMLOC"},
+ {DNS_T_SRV,"SRV"},
+ {DNS_T_ATMA,"ATMA"},
+ {DNS_T_NAPTR,"NAPTR"},
+ {DNS_T_KX,"KX"},
+ {DNS_T_CERT,"CERT"},
+ {DNS_T_A6,"A6"},
+ {DNS_T_DNAME,"DNAME"},
+ {DNS_T_SINK,"SINK"},
+ {DNS_T_OPT,"OPT"},
+ {DNS_T_DS,"DS"},
+ {DNS_T_SSHFP,"SSHFP"},
+ {DNS_T_IPSECKEY,"IPSECKEY"},
+ {DNS_T_RRSIG,"RRSIG"},
+ {DNS_T_NSEC,"NSEC"},
+ {DNS_T_DNSKEY,"DNSKEY"},
+ {DNS_T_DHCID,"DHCID"},
+ {DNS_T_NSEC3,"NSEC3"},
+ {DNS_T_NSEC3PARAMS,"NSEC3PARAMS"},
+ {DNS_T_TALINK,"TALINK"},
+ {DNS_T_SPF,"SPF"},
+ {DNS_T_UINFO,"UINFO"},
+ {DNS_T_UID,"UID"},
+ {DNS_T_GID,"GID"},
+ {DNS_T_UNSPEC,"UNSPEC"},
+ {DNS_T_TSIG,"TSIG"},
+ {DNS_T_IXFR,"IXFR"},
+ {DNS_T_AXFR,"AXFR"},
+ {DNS_T_MAILB,"MAILB"},
+ {DNS_T_MAILA,"MAILA"},
+ {DNS_T_ANY,"ANY"},
+ {DNS_T_ZXFR,"ZXFR"},
+ {DNS_T_DLV,"DLV"},
+ {DNS_T_MAX,"MAX"},
+ {0,0}};
+const char *dns_typename(enum dns_type code) {
+ static char nm[20];
+ switch(code) {
+ case DNS_T_INVALID: return dns_typetab[0].name;
+ case DNS_T_A: return dns_typetab[1].name;
+ case DNS_T_NS: return dns_typetab[2].name;
+ case DNS_T_MD: return dns_typetab[3].name;
+ case DNS_T_MF: return dns_typetab[4].name;
+ case DNS_T_CNAME: return dns_typetab[5].name;
+ case DNS_T_SOA: return dns_typetab[6].name;
+ case DNS_T_MB: return dns_typetab[7].name;
+ case DNS_T_MG: return dns_typetab[8].name;
+ case DNS_T_MR: return dns_typetab[9].name;
+ case DNS_T_NULL: return dns_typetab[10].name;
+ case DNS_T_WKS: return dns_typetab[11].name;
+ case DNS_T_PTR: return dns_typetab[12].name;
+ case DNS_T_HINFO: return dns_typetab[13].name;
+ case DNS_T_MINFO: return dns_typetab[14].name;
+ case DNS_T_MX: return dns_typetab[15].name;
+ case DNS_T_TXT: return dns_typetab[16].name;
+ case DNS_T_RP: return dns_typetab[17].name;
+ case DNS_T_AFSDB: return dns_typetab[18].name;
+ case DNS_T_X25: return dns_typetab[19].name;
+ case DNS_T_ISDN: return dns_typetab[20].name;
+ case DNS_T_RT: return dns_typetab[21].name;
+ case DNS_T_NSAP: return dns_typetab[22].name;
+ case DNS_T_NSAP_PTR: return dns_typetab[23].name;
+ case DNS_T_SIG: return dns_typetab[24].name;
+ case DNS_T_KEY: return dns_typetab[25].name;
+ case DNS_T_PX: return dns_typetab[26].name;
+ case DNS_T_GPOS: return dns_typetab[27].name;
+ case DNS_T_AAAA: return dns_typetab[28].name;
+ case DNS_T_LOC: return dns_typetab[29].name;
+ case DNS_T_NXT: return dns_typetab[30].name;
+ case DNS_T_EID: return dns_typetab[31].name;
+ case DNS_T_NIMLOC: return dns_typetab[32].name;
+ case DNS_T_SRV: return dns_typetab[33].name;
+ case DNS_T_ATMA: return dns_typetab[34].name;
+ case DNS_T_NAPTR: return dns_typetab[35].name;
+ case DNS_T_KX: return dns_typetab[36].name;
+ case DNS_T_CERT: return dns_typetab[37].name;
+ case DNS_T_A6: return dns_typetab[38].name;
+ case DNS_T_DNAME: return dns_typetab[39].name;
+ case DNS_T_SINK: return dns_typetab[40].name;
+ case DNS_T_OPT: return dns_typetab[41].name;
+ case DNS_T_DS: return dns_typetab[42].name;
+ case DNS_T_SSHFP: return dns_typetab[43].name;
+ case DNS_T_IPSECKEY: return dns_typetab[44].name;
+ case DNS_T_RRSIG: return dns_typetab[45].name;
+ case DNS_T_NSEC: return dns_typetab[46].name;
+ case DNS_T_DNSKEY: return dns_typetab[47].name;
+ case DNS_T_DHCID: return dns_typetab[48].name;
+ case DNS_T_NSEC3: return dns_typetab[49].name;
+ case DNS_T_NSEC3PARAMS: return dns_typetab[50].name;
+ case DNS_T_TALINK: return dns_typetab[51].name;
+ case DNS_T_SPF: return dns_typetab[52].name;
+ case DNS_T_UINFO: return dns_typetab[53].name;
+ case DNS_T_UID: return dns_typetab[54].name;
+ case DNS_T_GID: return dns_typetab[55].name;
+ case DNS_T_UNSPEC: return dns_typetab[56].name;
+ case DNS_T_TSIG: return dns_typetab[57].name;
+ case DNS_T_IXFR: return dns_typetab[58].name;
+ case DNS_T_AXFR: return dns_typetab[59].name;
+ case DNS_T_MAILB: return dns_typetab[60].name;
+ case DNS_T_MAILA: return dns_typetab[61].name;
+ case DNS_T_ANY: return dns_typetab[62].name;
+ case DNS_T_ZXFR: return dns_typetab[63].name;
+ case DNS_T_DLV: return dns_typetab[64].name;
+ case DNS_T_MAX: return dns_typetab[65].name;
+ }
+ return _dns_format_code(nm,"type",code);
+}
+
+const struct dns_nameval dns_classtab[] = {
+ {DNS_C_INVALID,"INVALID"},
+ {DNS_C_IN,"IN"},
+ {DNS_C_CH,"CH"},
+ {DNS_C_HS,"HS"},
+ {DNS_C_ANY,"ANY"},
+ {0,0}};
+const char *dns_classname(enum dns_class code) {
+ static char nm[20];
+ switch(code) {
+ case DNS_C_INVALID: return dns_classtab[0].name;
+ case DNS_C_IN: return dns_classtab[1].name;
+ case DNS_C_CH: return dns_classtab[2].name;
+ case DNS_C_HS: return dns_classtab[3].name;
+ case DNS_C_ANY: return dns_classtab[4].name;
+ }
+ return _dns_format_code(nm,"class",code);
+}
+
+const struct dns_nameval dns_rcodetab[] = {
+ {DNS_R_NOERROR,"NOERROR"},
+ {DNS_R_FORMERR,"FORMERR"},
+ {DNS_R_SERVFAIL,"SERVFAIL"},
+ {DNS_R_NXDOMAIN,"NXDOMAIN"},
+ {DNS_R_NOTIMPL,"NOTIMPL"},
+ {DNS_R_REFUSED,"REFUSED"},
+ {DNS_R_YXDOMAIN,"YXDOMAIN"},
+ {DNS_R_YXRRSET,"YXRRSET"},
+ {DNS_R_NXRRSET,"NXRRSET"},
+ {DNS_R_NOTAUTH,"NOTAUTH"},
+ {DNS_R_NOTZONE,"NOTZONE"},
+ {DNS_R_BADSIG,"BADSIG"},
+ {DNS_R_BADKEY,"BADKEY"},
+ {DNS_R_BADTIME,"BADTIME"},
+ {0,0}};
+const char *dns_rcodename(enum dns_rcode code) {
+ static char nm[20];
+ switch(code) {
+ case DNS_R_NOERROR: return dns_rcodetab[0].name;
+ case DNS_R_FORMERR: return dns_rcodetab[1].name;
+ case DNS_R_SERVFAIL: return dns_rcodetab[2].name;
+ case DNS_R_NXDOMAIN: return dns_rcodetab[3].name;
+ case DNS_R_NOTIMPL: return dns_rcodetab[4].name;
+ case DNS_R_REFUSED: return dns_rcodetab[5].name;
+ case DNS_R_YXDOMAIN: return dns_rcodetab[6].name;
+ case DNS_R_YXRRSET: return dns_rcodetab[7].name;
+ case DNS_R_NXRRSET: return dns_rcodetab[8].name;
+ case DNS_R_NOTAUTH: return dns_rcodetab[9].name;
+ case DNS_R_NOTZONE: return dns_rcodetab[10].name;
+ case DNS_R_BADSIG: return dns_rcodetab[11].name;
+ case DNS_R_BADKEY: return dns_rcodetab[12].name;
+ case DNS_R_BADTIME: return dns_rcodetab[13].name;
+ }
+ return _dns_format_code(nm,"rcode",code);
+}

3rdparty/udns/udns_dn.c

@@ -0,0 +1,379 @@
+/* udns_dn.c
+   domain names manipulation routines
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <string.h>
+#include "udns.h"
+
+unsigned dns_dnlen(dnscc_t *dn) {
+  register dnscc_t *d = dn;
+  while(*d)
+    d += 1 + *d;
+  return (unsigned)(d - dn) + 1;
+}
+
+unsigned dns_dnlabels(register dnscc_t *dn) {
+  register unsigned l = 0;
+  while(*dn)
+    ++l, dn += 1 + *dn;
+  return l;
+}
+
+unsigned dns_dnequal(register dnscc_t *dn1, register dnscc_t *dn2) {
+  register unsigned c;
+  dnscc_t *dn = dn1;
+  for(;;) {
+    if ((c = *dn1++) != *dn2++)
+      return 0;
+    if (!c)
+      return (unsigned)(dn1 - dn);
+    while(c--) {
+      if (DNS_DNLC(*dn1) != DNS_DNLC(*dn2))
+        return 0;
+      ++dn1; ++dn2;
+    }
+  }
+}
+
+unsigned
+dns_dntodn(dnscc_t *sdn, dnsc_t *ddn, unsigned ddnsiz) {
+  unsigned sdnlen = dns_dnlen(sdn);
+  if (ddnsiz < sdnlen)
+    return 0;
+  memcpy(ddn, sdn, sdnlen);
+  return sdnlen;
+}
+
+int
+dns_ptodn(const char *name, unsigned namelen,
+          dnsc_t *dn, unsigned dnsiz, int *isabs)
+{
+  dnsc_t *dp;		/* current position in dn (len byte first) */
+  dnsc_t *const de	/* end of dn: last byte that can be filled up */
+      = dn + (dnsiz >= DNS_MAXDN ? DNS_MAXDN : dnsiz) - 1;
+  dnscc_t *np = (dnscc_t *)name;
+  dnscc_t *ne = np + (namelen ? namelen : strlen((char*)np));
+  dnsc_t *llab;		/* start of last label (llab[-1] will be length) */
+  unsigned c;		/* next input character, or length of last label */
+
+  if (!dnsiz)
+    return 0;
+  dp = llab = dn + 1;
+
+  while(np < ne) {
+
+    if (*np == '.') {	/* label delimiter */
+      c = dp - llab;		/* length of the label */
+      if (!c) {			/* empty label */
+        if (np == (dnscc_t *)name && np + 1 == ne) {
+          /* special case for root dn, aka `.' */
+          ++np;
+          break;
+        }
+        return -1;		/* zero label */
+      }
+      if (c > DNS_MAXLABEL)
+        return -1;		/* label too long */
+      llab[-1] = (dnsc_t)c;	/* update len of last label */
+      llab = ++dp; /* start new label, llab[-1] will be len of it */
+      ++np;
+      continue;
+    }
+
+    /* check whenever we may put out one more byte */
+    if (dp >= de) /* too long? */
+      return dnsiz >= DNS_MAXDN ? -1 : 0;
+    if (*np != '\\') { /* non-escape, simple case */
+      *dp++ = *np++;
+      continue;
+    }
+    /* handle \-style escape */
+    /* note that traditionally, domain names (gethostbyname etc)
+     * used decimal \dd notation, not octal \ooo (RFC1035), so
+     * we're following this tradition here.
+     */
+    if (++np == ne)
+      return -1;			/* bad escape */
+    else if (*np >= '0' && *np <= '9') { /* decimal number */
+      /* we allow not only exactly 3 digits as per RFC1035,
+       * but also 2 or 1, for better usability. */
+      c = *np++ - '0';
+      if (np < ne && *np >= '0' && *np <= '9') { /* 2digits */
+        c = c * 10 + *np++ - '0';
+        if (np < ne && *np >= '0' && *np <= '9') {
+          c = c * 10 + *np++ - '0';
+          if (c > 255)
+            return -1;			/* bad escape */
+        }
+      }
+    }
+    else
+      c = *np++;
+    *dp++ = (dnsc_t)c;	/* place next out byte */
+  }
+
+  if ((c = dp - llab) > DNS_MAXLABEL)
+    return -1;				/* label too long */
+  if ((llab[-1] = (dnsc_t)c) != 0) {
+    *dp++ = 0;
+    if (isabs)
+      *isabs = 0;
+  }
+  else if (isabs)
+    *isabs = 1;
+
+  return dp - dn;
+}
+
+dnscc_t dns_inaddr_arpa_dn[14] = "\07in-addr\04arpa";
+
+dnsc_t *
+dns_a4todn_(const struct in_addr *addr, dnsc_t *dn, dnsc_t *dne) {
+  const unsigned char *s = ((const unsigned char *)addr) + 4;
+  while(s > (const unsigned char *)addr) {
+    unsigned n = *--s;
+    dnsc_t *p = dn + 1;
+    if (n > 99) {
+      if (p + 2 > dne) return 0;
+      *p++ = n / 100 + '0';
+      *p++ = (n % 100 / 10) + '0';
+      *p = n % 10 + '0';
+    }
+    else if (n > 9) {
+      if (p + 1 > dne) return 0;
+      *p++ = n / 10 + '0';
+      *p = n % 10 + '0';
+    }
+    else {
+      if (p > dne) return 0;
+      *p = n + '0';
+    }
+    *dn = p - dn;
+    dn = p + 1;
+  }
+  return dn;
+}
+
+int dns_a4todn(const struct in_addr *addr, dnscc_t *tdn,
+               dnsc_t *dn, unsigned dnsiz) {
+  dnsc_t *dne = dn + (dnsiz > DNS_MAXDN ? DNS_MAXDN : dnsiz);
+  dnsc_t *p;
+  unsigned l;
+  p = dns_a4todn_(addr, dn, dne);
+  if (!p) return 0;
+  if (!tdn)
+    tdn = dns_inaddr_arpa_dn;
+  l = dns_dnlen(tdn);
+  if (p + l > dne) return dnsiz >= DNS_MAXDN ? -1 : 0;
+  memcpy(p, tdn, l);
+  return (p + l) - dn;
+}
+
+int dns_a4ptodn(const struct in_addr *addr, const char *tname,
+                dnsc_t *dn, unsigned dnsiz) {
+  dnsc_t *p;
+  int r;
+  if (!tname)
+    return dns_a4todn(addr, NULL, dn, dnsiz);
+  p = dns_a4todn_(addr, dn, dn + dnsiz);
+  if (!p) return 0;
+  r = dns_sptodn(tname, p, dnsiz - (p - dn));
+  return r != 0 ? r : dnsiz >= DNS_MAXDN ? -1 : 0;
+}
+
+dnscc_t dns_ip6_arpa_dn[10] = "\03ip6\04arpa";
+
+dnsc_t *
+dns_a6todn_(const struct in6_addr *addr, dnsc_t *dn, dnsc_t *dne) {
+  const unsigned char *s = ((const unsigned char *)addr) + 16;
+  if (dn + 64 > dne) return 0;
+  while(s > (const unsigned char *)addr) {
+    unsigned n = *--s & 0x0f;
+    *dn++ = 1;
+    *dn++ = n > 9 ? n + 'a' - 10 : n + '0';
+    *dn++ = 1;
+    n = *s >> 4;
+    *dn++ = n > 9 ? n + 'a' - 10 : n + '0';
+  }
+  return dn;
+}
+
+int dns_a6todn(const struct in6_addr *addr, dnscc_t *tdn,
+               dnsc_t *dn, unsigned dnsiz) {
+  dnsc_t *dne = dn + (dnsiz > DNS_MAXDN ? DNS_MAXDN : dnsiz);
+  dnsc_t *p;
+  unsigned l;
+  p = dns_a6todn_(addr, dn, dne);
+  if (!p) return 0;
+  if (!tdn)
+    tdn = dns_ip6_arpa_dn;
+  l = dns_dnlen(tdn);
+  if (p + l > dne) return dnsiz >= DNS_MAXDN ? -1 : 0;
+  memcpy(p, tdn, l);
+  return (p + l) - dn;
+}
+
+int dns_a6ptodn(const struct in6_addr *addr, const char *tname,
+                dnsc_t *dn, unsigned dnsiz) {
+  dnsc_t *p;
+  int r;
+  if (!tname)
+    return dns_a6todn(addr, NULL, dn, dnsiz);
+  p = dns_a6todn_(addr, dn, dn + dnsiz);
+  if (!p) return 0;
+  r = dns_sptodn(tname, p, dnsiz - (p - dn));
+  return r != 0 ? r : dnsiz >= DNS_MAXDN ? -1 : 0;
+}
+
+/* return size of buffer required to convert the dn into asciiz string.
+ * Keep in sync with dns_dntop() below.
+ */
+unsigned dns_dntop_size(dnscc_t *dn) {
+  unsigned size = 0;		/* the size reqd */
+  dnscc_t *le;			/* label end */
+
+  while(*dn) {
+    /* *dn is the length of the next label, non-zero */
+    if (size)
+      ++size;		/* for the dot */
+    le = dn + *dn + 1;
+    ++dn;
+    do {
+      switch(*dn) {
+      case '.':
+      case '\\':
+      /* Special modifiers in zone files. */
+      case '"':
+      case ';':
+      case '@':
+      case '$':
+        size += 2;
+        break;
+      default:
+        if (*dn <= 0x20 || *dn >= 0x7f)
+          /* \ddd decimal notation */
+          size += 4;
+        else
+          size += 1;
+      }
+    } while(++dn < le);
+  }
+  size += 1;	/* zero byte at the end - string terminator */
+  return size > DNS_MAXNAME ? 0 : size;
+}
+
+/* Convert the dn into asciiz string.
+ * Keep in sync with dns_dntop_size() above.
+ */
+int dns_dntop(dnscc_t *dn, char *name, unsigned namesiz) {
+  char *np = name;			/* current name ptr */
+  char *const ne = name + namesiz;	/* end of name */
+  dnscc_t *le;		/* label end */
+
+  while(*dn) {
+    /* *dn is the length of the next label, non-zero */
+    if (np != name) {
+      if (np >= ne) goto toolong;
+      *np++ = '.';
+    }
+    le = dn + *dn + 1;
+    ++dn;
+    do {
+      switch(*dn) {
+      case '.':
+      case '\\':
+      /* Special modifiers in zone files. */
+      case '"':
+      case ';':
+      case '@':
+      case '$':
+        if (np + 2 > ne) goto toolong;
+        *np++ = '\\';
+        *np++ = *dn;
+        break;
+      default:
+        if (*dn <= 0x20 || *dn >= 0x7f) {
+          /* \ddd decimal notation */
+          if (np + 4 >= ne) goto toolong;
+          *np++ = '\\';
+          *np++ = '0' + (*dn / 100);
+          *np++ = '0' + ((*dn % 100) / 10);
+          *np++ = '0' + (*dn % 10);
+        }
+        else {
+          if (np >= ne) goto toolong;
+          *np++ = *dn;
+        }
+      }
+    } while(++dn < le);
+  }
+  if (np >= ne) goto toolong;
+  *np++ = '\0';
+  return np - name;
+toolong:
+  return namesiz >= DNS_MAXNAME ? -1 : 0;
+}
+
+#ifdef TEST
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+  int i;
+  int sz;
+  dnsc_t dn[DNS_MAXDN+10];
+  dnsc_t *dl, *dp;
+  int isabs;
+
+  sz = (argc > 1) ? atoi(argv[1]) : 0;
+
+  for(i = 2; i < argc; ++i) {
+    int r = dns_ptodn(argv[i], 0, dn, sz, &isabs);
+    printf("%s: ", argv[i]);
+    if (r < 0) printf("error\n");
+    else if (!r) printf("buffer too small\n");
+    else {
+      printf("len=%d dnlen=%d size=%d name:",
+             r, dns_dnlen(dn), dns_dntop_size(dn));
+      dl = dn;
+      while(*dl) {
+        printf(" %d=", *dl);
+        dp = dl + 1;
+        dl = dp + *dl;
+        while(dp < dl) {
+          if (*dp <= ' ' || *dp >= 0x7f)
+            printf("\\%03d", *dp);
+          else if (*dp == '.' || *dp == '\\')
+            printf("\\%c", *dp);
+          else
+            putchar(*dp);
+          ++dp;
+        }
+      }
+      if (isabs) putchar('.');
+      putchar('\n');
+    }
+  }
+  return 0;
+}
+
+#endif /* TEST */

3rdparty/udns/udns_dntosp.c

@@ -0,0 +1,30 @@
+/* udns_dntosp.c
+   dns_dntosp() = convert DN to asciiz string using static buffer
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include "udns.h"
+
+static char name[DNS_MAXNAME];
+
+const char *dns_dntosp(dnscc_t *dn) {
+  return dns_dntop(dn, name, sizeof(name)) > 0 ? name : 0;
+}

3rdparty/udns/udns_init.c

@@ -0,0 +1,231 @@
+/* udns_init.c
+   resolver initialisation stuff
+
+   Copyright (C) 2006  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#ifdef WINDOWS
+# include <winsock2.h>          /* includes <windows.h> */
+# include <iphlpapi.h>		/* for dns server addresses etc */
+#else
+# include <sys/types.h>
+# include <unistd.h>
+# include <fcntl.h>
+#endif	/* !WINDOWS */
+
+#include <stdlib.h>
+#include <string.h>
+#include "udns.h"
+
+#define ISSPACE(x) (x == ' ' || x == '\t' || x == '\r' || x == '\n')
+
+static const char space[] = " \t\r\n";
+
+static void dns_set_serv_internal(struct dns_ctx *ctx, char *serv) {
+  dns_add_serv(ctx, NULL);
+  for(serv = strtok(serv, space); serv; serv = strtok(NULL, space))
+    dns_add_serv(ctx, serv);
+}
+
+static void dns_set_srch_internal(struct dns_ctx *ctx, char *srch) {
+  dns_add_srch(ctx, NULL);
+  for(srch = strtok(srch, space); srch; srch = strtok(NULL, space))
+    dns_add_srch(ctx, srch);
+}
+
+#ifdef WINDOWS
+
+#ifndef NO_IPHLPAPI
+/* Apparently, some systems does not have proper headers for IPHLPAIP to work.
+ * The best is to upgrade headers, but here's another, ugly workaround for
+ * this: compile with -DNO_IPHLPAPI.
+ */
+
+typedef DWORD (WINAPI *GetAdaptersAddressesFunc)(
+  ULONG Family, DWORD Flags, PVOID Reserved,
+  PIP_ADAPTER_ADDRESSES pAdapterAddresses,
+  PULONG pOutBufLen);
+
+static int dns_initns_iphlpapi(struct dns_ctx *ctx) {
+  HANDLE h_iphlpapi;
+  GetAdaptersAddressesFunc pfnGetAdAddrs;
+  PIP_ADAPTER_ADDRESSES pAddr, pAddrBuf;
+  PIP_ADAPTER_DNS_SERVER_ADDRESS pDnsAddr;
+  ULONG ulOutBufLen;
+  DWORD dwRetVal;
+  int ret = -1;
+
+  h_iphlpapi = LoadLibrary("iphlpapi.dll");
+  if (!h_iphlpapi)
+    return -1;
+  pfnGetAdAddrs = (GetAdaptersAddressesFunc)
+    GetProcAddress(h_iphlpapi, "GetAdaptersAddresses");
+  if (!pfnGetAdAddrs) goto freelib;
+  ulOutBufLen = 0;
+  dwRetVal = pfnGetAdAddrs(AF_UNSPEC, 0, NULL, NULL, &ulOutBufLen);
+  if (dwRetVal != ERROR_BUFFER_OVERFLOW) goto freelib;
+  pAddrBuf = malloc(ulOutBufLen);
+  if (!pAddrBuf) goto freelib;
+  dwRetVal = pfnGetAdAddrs(AF_UNSPEC, 0, NULL, pAddrBuf, &ulOutBufLen);
+  if (dwRetVal != ERROR_SUCCESS) goto freemem;
+  for (pAddr = pAddrBuf; pAddr; pAddr = pAddr->Next)
+    for (pDnsAddr = pAddr->FirstDnsServerAddress;
+	 pDnsAddr;
+	 pDnsAddr = pDnsAddr->Next)
+      dns_add_serv_s(ctx, pDnsAddr->Address.lpSockaddr);
+  ret = 0;
+freemem:
+  free(pAddrBuf);
+freelib:
+  FreeLibrary(h_iphlpapi);
+  return ret;
+}
+
+#else /* NO_IPHLPAPI */
+
+#define dns_initns_iphlpapi(ctx) (-1)
+
+#endif /* NO_IPHLPAPI */
+
+static int dns_initns_registry(struct dns_ctx *ctx) {
+  LONG res;
+  HKEY hk;
+  DWORD type = REG_EXPAND_SZ | REG_SZ;
+  DWORD len;
+  char valBuf[1024];
+
+#define REGKEY_WINNT "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"
+#define REGKEY_WIN9x "SYSTEM\\CurrentControlSet\\Services\\VxD\\MSTCP"
+  res = RegOpenKeyEx(HKEY_LOCAL_MACHINE, REGKEY_WINNT, 0, KEY_QUERY_VALUE, &hk);
+  if (res != ERROR_SUCCESS)
+    res = RegOpenKeyEx(HKEY_LOCAL_MACHINE, REGKEY_WIN9x,
+                       0, KEY_QUERY_VALUE, &hk);
+  if (res != ERROR_SUCCESS)
+    return -1;
+  len = sizeof(valBuf) - 1;
+  res = RegQueryValueEx(hk, "NameServer", NULL, &type, (BYTE*)valBuf, &len);
+  if (res != ERROR_SUCCESS || !len || !valBuf[0]) {
+    len = sizeof(valBuf) - 1;
+    res = RegQueryValueEx(hk, "DhcpNameServer", NULL, &type,
+                          (BYTE*)valBuf, &len);
+  }
+  RegCloseKey(hk);
+  if (res != ERROR_SUCCESS || !len || !valBuf[0])
+    return -1;
+  valBuf[len] = '\0';
+  /* nameservers are stored as a whitespace-seperate list:
+   * "192.168.1.1 123.21.32.12" */
+  dns_set_serv_internal(ctx, valBuf);
+  return 0;
+}
+
+#else /* !WINDOWS */
+
+static int dns_init_resolvconf(struct dns_ctx *ctx) {
+  char *v;
+  char buf[2049];	/* this buffer is used to hold /etc/resolv.conf */
+  int has_srch = 0;
+
+  /* read resolv.conf... */
+  { int fd = open("/etc/resolv.conf", O_RDONLY);
+    if (fd >= 0) {
+      int l = read(fd, buf, sizeof(buf) - 1);
+      close(fd);
+      buf[l < 0 ? 0 : l] = '\0';
+    }
+    else
+      buf[0] = '\0';
+  }
+  if (buf[0]) {	/* ...and parse it */
+    char *line, *nextline;
+    line = buf;
+    do {
+      nextline = strchr(line, '\n');
+      if (nextline) *nextline++ = '\0';
+      v = line;
+      while(*v && !ISSPACE(*v)) ++v;
+      if (!*v) continue;
+      *v++ = '\0';
+      while(ISSPACE(*v)) ++v;
+      if (!*v) continue;
+      if (strcmp(line, "domain") == 0) {
+        dns_set_srch_internal(ctx, strtok(v, space));
+	has_srch = 1;
+      }
+      else if (strcmp(line, "search") == 0) {
+        dns_set_srch_internal(ctx, v);
+	has_srch = 1;
+      }
+      else if (strcmp(line, "nameserver") == 0)
+        dns_add_serv(ctx, strtok(v, space));
+      else if (strcmp(line, "options") == 0)
+        dns_set_opts(ctx, v);
+    } while((line = nextline) != NULL);
+  }
+
+  buf[sizeof(buf)-1] = '\0';
+
+  /* get list of nameservers from env. vars. */
+  if ((v = getenv("NSCACHEIP")) != NULL ||
+      (v = getenv("NAMESERVERS")) != NULL) {
+    strncpy(buf, v, sizeof(buf) - 1);
+    dns_set_serv_internal(ctx, buf);
+  }
+  /* if $LOCALDOMAIN is set, use it for search list */
+  if ((v = getenv("LOCALDOMAIN")) != NULL) {
+    strncpy(buf, v, sizeof(buf) - 1);
+    dns_set_srch_internal(ctx, buf);
+    has_srch = 1;
+  }
+  if ((v = getenv("RES_OPTIONS")) != NULL)
+    dns_set_opts(ctx, v);
+
+  /* if still no search list, use local domain name */
+  if (has_srch &&
+      gethostname(buf, sizeof(buf) - 1) == 0 &&
+      (v = strchr(buf, '.')) != NULL &&
+      *++v != '\0')
+    dns_add_srch(ctx, v);
+
+  return 0;
+}
+
+#endif /* !WINDOWS */
+
+int dns_init(struct dns_ctx *ctx, int do_open) {
+  if (!ctx)
+    ctx = &dns_defctx;
+  dns_reset(ctx);
+
+#ifdef WINDOWS
+  if (dns_initns_iphlpapi(ctx) != 0)
+    dns_initns_registry(ctx);
+  /*XXX WINDOWS: probably good to get default domain and search list too...
+   * And options.  Something is in registry. */
+  /*XXX WINDOWS: maybe environment variables are also useful? */
+#else
+  dns_init_resolvconf(ctx);
+#endif
+
+  return do_open ? dns_open(ctx) : 0;
+}

3rdparty/udns/udns_jran.c

@@ -0,0 +1,52 @@
+/* udns_jran.c: small non-cryptographic random number generator
+ * taken from http://burtleburtle.net/bob/rand/smallprng.html
+ * by Bob Jenkins, Public domain.
+ */
+
+#include "udns.h"
+
+#define rot32(x,k) (((x) << (k)) | ((x) >> (32-(k))))
+#define rot64(x,k) (((x) << (k)) | ((x) >> (64-(k))))
+#define tr32(x) ((x)&0xffffffffu)
+
+unsigned udns_jranval(struct udns_jranctx *x) {
+  /* This routine can be made to work with either 32 or 64bit words -
+   * if JRAN_32_64 is defined when compiling the file.
+   * We use if() instead of #if since there's no good
+   * portable way to check sizeof() in preprocessor without
+   * introducing some ugly configure-time checks.
+   * Most compilers will optimize the wrong branches away anyway.
+   * By default it assumes 32bit integers
+   */
+#ifdef JRAN_32_64
+  if (sizeof(unsigned) == 4) {
+#endif
+    unsigned e = tr32(x->a - rot32(x->b, 27));
+    x->a = tr32(x->b ^ rot32(x->c, 17));
+    x->b = tr32(x->c + x->d);
+    x->c = tr32(x->d + e);
+    x->d = tr32(e + x->a);
+#ifdef JRAN_32_64
+  }
+  else if (sizeof(unsigned) == 8) { /* assuming it's 64bits */
+    unsigned e = x->a - rot64(x->b, 7);
+    x->a = x->b ^ rot64(x->c, 13);
+    x->b = x->c + rot64(x->d, 37);
+    x->c = x->d + e;
+    x->d = e + x->a;
+  }
+  else {
+    unsigned e = 0;
+    x->d = 1/e; /* bail */
+  }
+#endif
+  return x->d;
+}
+
+void udns_jraninit(struct udns_jranctx *x, unsigned seed) {
+  unsigned i;
+  x->a = 0xf1ea5eed;
+  x->b = x->c = x->d = seed;
+  for (i = 0; i < 20; ++i)
+     (void)udns_jranval(x);
+}

3rdparty/udns/udns_misc.c

@@ -0,0 +1,67 @@
+/* udns_misc.c
+   miscellaneous routines
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include "udns.h"
+
+int dns_findname(const struct dns_nameval *nv, const char *name) {
+  register const char *a, *b;
+  for(; nv->name; ++nv)
+    for(a = name, b = nv->name; ; ++a, ++b)
+      if (DNS_DNUC(*a) != *b) break;
+      else if (!*a) return nv->val;
+  return -1;
+}
+
+const char *_dns_format_code(char *buf, const char *prefix, int code) {
+  char *bp = buf;
+  unsigned c, n;
+  do *bp++ = DNS_DNUC(*prefix);
+  while(*++prefix);
+  *bp++ = '#';
+  if (code < 0) code = -code, *bp++ = '-';
+  n = 0; c = code;
+  do ++n;
+  while((c /= 10));
+  c = code;
+  bp[n--] = '\0';
+  do bp[n--] = c % 10 + '0';
+  while((c /= 10));
+  return buf;
+}
+
+const char *dns_strerror(int err) {
+  if (err >= 0) return "successeful completion";
+  switch(err) {
+  case DNS_E_TEMPFAIL:	return "temporary failure in name resolution";
+  case DNS_E_PROTOCOL:	return "protocol error";
+  case DNS_E_NXDOMAIN:	return "domain name does not exist";
+  case DNS_E_NODATA:	return "valid domain but no data of requested type";
+  case DNS_E_NOMEM:	return "out of memory";
+  case DNS_E_BADQUERY:	return "malformed query";
+  default:		return "unknown error";
+  }
+}
+
+const char *dns_version(void) {
+  return UDNS_VERSION;
+}

3rdparty/udns/udns_parse.c

@@ -0,0 +1,169 @@
+/* udns_parse.c
+   raw DNS packet parsing routines
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <string.h>
+#include <assert.h>
+#include "udns.h"
+
+dnscc_t *dns_skipdn(dnscc_t *cur, dnscc_t *end) {
+  unsigned c;
+  for(;;) {
+    if (cur >= end)
+      return NULL;
+    c = *cur++;
+    if (!c)
+      return cur;
+    if (c & 192)		/* jump */
+      return cur + 1 >= end ? NULL : cur + 1;
+    cur += c;
+  }
+}
+
+int
+dns_getdn(dnscc_t *pkt, dnscc_t **cur, dnscc_t *end,
+          register dnsc_t *dn, unsigned dnsiz) {
+  unsigned c;
+  dnscc_t *pp = *cur;		/* current packet pointer */
+  dnsc_t *dp = dn;		/* current dn pointer */
+  dnsc_t *const de		/* end of the DN dest */
+       = dn + (dnsiz < DNS_MAXDN ? dnsiz : DNS_MAXDN);
+  dnscc_t *jump = NULL;		/* ptr after first jump if any */
+  unsigned loop = 100;		/* jump loop counter */
+
+  for(;;) {		/* loop by labels */
+    if (pp >= end)		/* reached end of packet? */
+      return -1;
+    c = *pp++;			/* length of the label */
+    if (!c) {			/* empty label: terminate */
+      if (dn >= de)		/* can't fit terminator */
+        goto noroom;
+      *dp++ = 0;
+      /* return next pos: either after the first jump or current */
+      *cur = jump ? jump : pp;
+      return dp - dn;
+    }
+    if (c & 192) {		/* jump */
+      if (pp >= end)		/* eop instead of jump pos */
+        return -1;
+      if (!jump) jump = pp + 1;	/* remember first jump */
+      else if (!--loop) return -1; /* too many jumps */
+      c = ((c & ~192) << 8) | *pp; /* new pos */
+      if (c < DNS_HSIZE)	/* don't allow jump into the header */
+        return -1;
+      pp = pkt + c;
+      continue;
+    }
+    if (c > DNS_MAXLABEL)	/* too long label? */
+      return -1;
+    if (pp + c > end)		/* label does not fit in packet? */
+      return -1;
+    if (dp + c + 1 > de)	/* if enouth room for the label */
+      goto noroom;
+    *dp++ = c;			/* label length */
+    memcpy(dp, pp, c);		/* and the label itself */
+    dp += c;
+    pp += c;			/* advance to the next label */
+  }
+noroom:
+  return dnsiz < DNS_MAXDN ? 0 : -1;
+}
+
+void dns_rewind(struct dns_parse *p, dnscc_t *qdn) {
+  p->dnsp_qdn = qdn;
+  p->dnsp_cur = p->dnsp_ans;
+  p->dnsp_rrl = dns_numan(p->dnsp_pkt);
+  p->dnsp_ttl = 0xffffffffu;
+  p->dnsp_nrr = 0;
+}
+
+void
+dns_initparse(struct dns_parse *p, dnscc_t *qdn,
+              dnscc_t *pkt, dnscc_t *cur, dnscc_t *end) {
+  p->dnsp_pkt = pkt;
+  p->dnsp_end = end;
+  p->dnsp_rrl = dns_numan(pkt);
+  p->dnsp_qdn = qdn;
+  assert(cur + 4 <= end);
+  if ((p->dnsp_qtyp = dns_get16(cur+0)) == DNS_T_ANY) p->dnsp_qtyp = 0;
+  if ((p->dnsp_qcls = dns_get16(cur+2)) == DNS_C_ANY) p->dnsp_qcls = 0;
+  p->dnsp_cur = p->dnsp_ans = cur + 4;
+  p->dnsp_ttl = 0xffffffffu;
+  p->dnsp_nrr = 0;
+}
+
+int dns_nextrr(struct dns_parse *p, struct dns_rr *rr) {
+  dnscc_t *cur = p->dnsp_cur;
+  while(p->dnsp_rrl > 0) {
+    --p->dnsp_rrl;
+    if (dns_getdn(p->dnsp_pkt, &cur, p->dnsp_end,
+                  rr->dnsrr_dn, sizeof(rr->dnsrr_dn)) <= 0)
+      return -1;
+    if (cur + 10 > p->dnsp_end)
+      return -1;
+    rr->dnsrr_typ = dns_get16(cur);
+    rr->dnsrr_cls = dns_get16(cur+2);
+    rr->dnsrr_ttl = dns_get32(cur+4);
+    rr->dnsrr_dsz = dns_get16(cur+8);
+    rr->dnsrr_dptr = cur = cur + 10;
+    rr->dnsrr_dend = cur = cur + rr->dnsrr_dsz;
+    if (cur > p->dnsp_end)
+      return -1;
+    if (p->dnsp_qdn && !dns_dnequal(p->dnsp_qdn, rr->dnsrr_dn))
+      continue;
+    if ((!p->dnsp_qcls || p->dnsp_qcls == rr->dnsrr_cls) &&
+        (!p->dnsp_qtyp || p->dnsp_qtyp == rr->dnsrr_typ)) {
+      p->dnsp_cur = cur;
+      ++p->dnsp_nrr;
+      if (p->dnsp_ttl > rr->dnsrr_ttl) p->dnsp_ttl = rr->dnsrr_ttl;
+      return 1;
+    }
+    if (p->dnsp_qdn && rr->dnsrr_typ == DNS_T_CNAME && !p->dnsp_nrr) {
+      if (dns_getdn(p->dnsp_pkt, &rr->dnsrr_dptr, p->dnsp_end,
+                    p->dnsp_dnbuf, sizeof(p->dnsp_dnbuf)) <= 0 ||
+          rr->dnsrr_dptr != rr->dnsrr_dend)
+        return -1;
+      p->dnsp_qdn = p->dnsp_dnbuf;
+      if (p->dnsp_ttl > rr->dnsrr_ttl) p->dnsp_ttl = rr->dnsrr_ttl;
+    }
+  }
+  p->dnsp_cur = cur;
+  return 0;
+}
+
+int dns_stdrr_size(const struct dns_parse *p) {
+  return
+    dns_dntop_size(p->dnsp_qdn) +
+    (p->dnsp_qdn == dns_payload(p->dnsp_pkt) ? 0 :
+     dns_dntop_size(dns_payload(p->dnsp_pkt)));
+}
+
+void *dns_stdrr_finish(struct dns_rr_null *ret, char *cp,
+                       const struct dns_parse *p) {
+  cp += dns_dntop(p->dnsp_qdn, (ret->dnsn_cname = cp), DNS_MAXNAME);
+  if (p->dnsp_qdn == dns_payload(p->dnsp_pkt))
+    ret->dnsn_qname = ret->dnsn_cname;
+  else
+    dns_dntop(dns_payload(p->dnsp_pkt), (ret->dnsn_qname = cp), DNS_MAXNAME);
+  ret->dnsn_ttl = p->dnsp_ttl;
+  return ret;
+}

3rdparty/udns/udns_rr_a.c

@@ -0,0 +1,126 @@
+/* udns_rr_a.c
+   parse/query A/AAAA IN records
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#ifndef WINDOWS
+# include <sys/types.h>
+# include <netinet/in.h>
+#endif
+#include "udns.h"
+
+/* here, we use common routine to parse both IPv4 and IPv6 addresses.
+ */
+
+/* this structure should match dns_rr_a[46] */
+struct dns_rr_a {
+  dns_rr_common(dnsa);
+  unsigned char *dnsa_addr;
+};
+
+static int
+dns_parse_a(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+            void **result, unsigned dsize) {
+  struct dns_rr_a *ret;
+  struct dns_parse p;
+  struct dns_rr rr;
+  int r;
+
+  /* first, validate and count number of addresses */
+  dns_initparse(&p, qdn, pkt, cur, end);
+  while((r = dns_nextrr(&p, &rr)) > 0)
+    if (rr.dnsrr_dsz != dsize)
+      return DNS_E_PROTOCOL;
+  if (r < 0)
+    return DNS_E_PROTOCOL;
+  else if (!p.dnsp_nrr)
+    return DNS_E_NODATA;
+
+  ret = malloc(sizeof(*ret) + dsize * p.dnsp_nrr + dns_stdrr_size(&p));
+  if (!ret)
+    return DNS_E_NOMEM;
+
+  ret->dnsa_nrr = p.dnsp_nrr;
+  ret->dnsa_addr = (unsigned char*)(ret+1);
+
+  /* copy the RRs */
+  for (dns_rewind(&p, qdn), r = 0; dns_nextrr(&p, &rr); ++r)
+    memcpy(ret->dnsa_addr + dsize * r, rr.dnsrr_dptr, dsize);
+
+  dns_stdrr_finish((struct dns_rr_null *)ret,
+                   (char *)(ret->dnsa_addr + dsize * p.dnsp_nrr), &p);
+  *result = ret;
+  return 0;
+}
+
+int
+dns_parse_a4(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+             void **result) {
+#ifdef AF_INET
+  assert(sizeof(struct in_addr) == 4);
+#endif
+  assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_A);
+  return dns_parse_a(qdn, pkt, cur, end, result, 4);
+}
+
+struct dns_query *
+dns_submit_a4(struct dns_ctx *ctx, const char *name, int flags,
+              dns_query_a4_fn *cbck, void *data) {
+  return
+    dns_submit_p(ctx, name, DNS_C_IN, DNS_T_A, flags,
+                 dns_parse_a4, (dns_query_fn*)cbck, data);
+}
+
+struct dns_rr_a4 *
+dns_resolve_a4(struct dns_ctx *ctx, const char *name, int flags) {
+  return (struct dns_rr_a4 *)
+    dns_resolve_p(ctx, name, DNS_C_IN, DNS_T_A, flags, dns_parse_a4);
+}
+
+int
+dns_parse_a6(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+             void **result) {
+#ifdef AF_INET6
+  assert(sizeof(struct in6_addr) == 16);
+#endif
+  assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_AAAA);
+  return dns_parse_a(qdn, pkt, cur, end, result, 16);
+}
+
+struct dns_query *
+dns_submit_a6(struct dns_ctx *ctx, const char *name, int flags,
+              dns_query_a6_fn *cbck, void *data) {
+  return
+    dns_submit_p(ctx, name, DNS_C_IN, DNS_T_AAAA, flags,
+                 dns_parse_a6, (dns_query_fn*)cbck, data);
+}
+
+struct dns_rr_a6 *
+dns_resolve_a6(struct dns_ctx *ctx, const char *name, int flags) {
+  return (struct dns_rr_a6 *)
+    dns_resolve_p(ctx, name, DNS_C_IN, DNS_T_AAAA, flags, dns_parse_a6);
+}

3rdparty/udns/udns_rr_mx.c

@@ -0,0 +1,91 @@
+/* udns_rr_mx.c
+   parse/query MX IN records
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "udns.h"
+
+int
+dns_parse_mx(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+             void **result) {
+  struct dns_rr_mx *ret;
+  struct dns_parse p;
+  struct dns_rr rr;
+  int r, l;
+  char *sp;
+  dnsc_t mx[DNS_MAXDN];
+
+  assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_MX);
+
+  /* first, validate the answer and count size of the result */
+  l = 0;
+  dns_initparse(&p, qdn, pkt, cur, end);
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    cur = rr.dnsrr_dptr + 2;
+    r = dns_getdn(pkt, &cur, end, mx, sizeof(mx));
+    if (r <= 0 || cur != rr.dnsrr_dend)
+      return DNS_E_PROTOCOL;
+    l += dns_dntop_size(mx);
+  }
+  if (r < 0)
+    return DNS_E_PROTOCOL;
+  if (!p.dnsp_nrr)
+    return DNS_E_NODATA;
+
+  /* next, allocate and set up result */
+  l += dns_stdrr_size(&p);
+  ret = malloc(sizeof(*ret) + sizeof(struct dns_mx) * p.dnsp_nrr + l);
+  if (!ret)
+    return DNS_E_NOMEM;
+  ret->dnsmx_nrr = p.dnsp_nrr;
+  ret->dnsmx_mx = (struct dns_mx *)(ret+1);
+
+  /* and 3rd, fill in result, finally */
+  sp = (char*)(ret->dnsmx_mx + p.dnsp_nrr);
+  for (dns_rewind(&p, qdn), r = 0; dns_nextrr(&p, &rr); ++r) {
+    ret->dnsmx_mx[r].name = sp;
+    cur = rr.dnsrr_dptr;
+    ret->dnsmx_mx[r].priority = dns_get16(cur);
+    cur += 2;
+    dns_getdn(pkt, &cur, end, mx, sizeof(mx));
+    sp += dns_dntop(mx, sp, DNS_MAXNAME);
+  }
+  dns_stdrr_finish((struct dns_rr_null *)ret, sp, &p);
+  *result = ret;
+  return 0;
+}
+
+struct dns_query *
+dns_submit_mx(struct dns_ctx *ctx, const char *name, int flags,
+              dns_query_mx_fn *cbck, void *data) {
+  return
+    dns_submit_p(ctx, name, DNS_C_IN, DNS_T_MX, flags,
+                 dns_parse_mx, (dns_query_fn *)cbck, data);
+}
+
+struct dns_rr_mx *
+dns_resolve_mx(struct dns_ctx *ctx, const char *name, int flags) {
+  return (struct dns_rr_mx *)
+    dns_resolve_p(ctx, name, DNS_C_IN, DNS_T_MX, flags, dns_parse_mx);
+}

3rdparty/udns/udns_rr_naptr.c

@@ -0,0 +1,128 @@
+/* udns_rr_naptr.c
+   parse/query NAPTR IN records
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   Copyright (C) 2006  Mikael Magnusson <mikma@users.sourceforge.net>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "udns.h"
+
+/* Get a single string for NAPTR record, pretty much like a DN label.
+ * String length is in first byte in *cur, so it can't be >255.
+ */
+static int dns_getstr(dnscc_t **cur, dnscc_t *ep, char *buf)
+{
+  unsigned l;
+  dnscc_t *cp = *cur;
+
+  l = *cp++;
+  if (cp + l > ep)
+    return DNS_E_PROTOCOL;
+  if (buf) {
+    memcpy(buf, cp, l);
+    buf[l] = '\0';
+  }
+  cp += l;
+
+  *cur = cp;
+  return l + 1;
+}
+
+int
+dns_parse_naptr(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+                void **result) {
+  struct dns_rr_naptr *ret;
+  struct dns_parse p;
+  struct dns_rr rr;
+  int r, l;
+  char *sp;
+  dnsc_t dn[DNS_MAXDN];
+
+  assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_NAPTR);
+
+  /* first, validate the answer and count size of the result */
+  l = 0;
+  dns_initparse(&p, qdn, pkt, cur, end);
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    int i;
+    dnscc_t *ep = rr.dnsrr_dend;
+
+    /* first 4 bytes: order & preference */
+    cur = rr.dnsrr_dptr + 4;
+
+    /* flags, services and regexp */
+    for (i = 0; i < 3; i++) {
+      r = dns_getstr(&cur, ep, NULL);
+      if (r < 0)
+        return r;
+      l += r;
+    }
+    /* replacement */
+    r = dns_getdn(pkt, &cur, end, dn, sizeof(dn));
+    if (r <= 0 || cur != rr.dnsrr_dend)
+      return DNS_E_PROTOCOL;
+    l += dns_dntop_size(dn);
+  }
+  if (r < 0)
+    return DNS_E_PROTOCOL;
+  if (!p.dnsp_nrr)
+    return DNS_E_NODATA;
+
+  /* next, allocate and set up result */
+  l += dns_stdrr_size(&p);
+  ret = malloc(sizeof(*ret) + sizeof(struct dns_naptr) * p.dnsp_nrr + l);
+  if (!ret)
+    return DNS_E_NOMEM;
+  ret->dnsnaptr_nrr = p.dnsp_nrr;
+  ret->dnsnaptr_naptr = (struct dns_naptr *)(ret+1);
+
+  /* and 3rd, fill in result, finally */
+  sp = (char*)(&ret->dnsnaptr_naptr[p.dnsp_nrr]);
+  for (dns_rewind(&p, qdn), r = 0; dns_nextrr(&p, &rr); ++r) {
+    cur = rr.dnsrr_dptr;
+    ret->dnsnaptr_naptr[r].order = dns_get16(cur); cur += 2;
+    ret->dnsnaptr_naptr[r].preference = dns_get16(cur); cur += 2;
+    sp += dns_getstr(&cur, end, (ret->dnsnaptr_naptr[r].flags = sp));
+    sp += dns_getstr(&cur, end, (ret->dnsnaptr_naptr[r].service = sp));
+    sp += dns_getstr(&cur, end, (ret->dnsnaptr_naptr[r].regexp = sp));
+    dns_getdn(pkt, &cur, end, dn, sizeof(dn));
+    sp += dns_dntop(dn, (ret->dnsnaptr_naptr[r].replacement = sp), DNS_MAXNAME);
+  }
+  dns_stdrr_finish((struct dns_rr_null *)ret, sp, &p);
+  *result = ret;
+  return 0;
+}
+
+struct dns_query *
+dns_submit_naptr(struct dns_ctx *ctx, const char *name, int flags,
+                 dns_query_naptr_fn *cbck, void *data) {
+  return
+    dns_submit_p(ctx, name, DNS_C_IN, DNS_T_NAPTR, flags,
+                 dns_parse_naptr, (dns_query_fn *)cbck, data);
+}
+
+struct dns_rr_naptr *
+dns_resolve_naptr(struct dns_ctx *ctx, const char *name, int flags) {
+  return (struct dns_rr_naptr *)
+    dns_resolve_p(ctx, name, DNS_C_IN, DNS_T_NAPTR, flags, dns_parse_naptr);
+}

3rdparty/udns/udns_rr_ptr.c

@@ -0,0 +1,109 @@
+/* udns_rr_ptr.c
+   parse/query PTR records
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+#include "udns.h"
+
+int
+dns_parse_ptr(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+              void **result) {
+  struct dns_rr_ptr *ret;
+  struct dns_parse p;
+  struct dns_rr rr;
+  int r, l, c;
+  char *sp;
+  dnsc_t ptr[DNS_MAXDN];
+
+  assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_PTR);
+
+  /* first, validate the answer and count size of the result */
+  l = c = 0;
+  dns_initparse(&p, qdn, pkt, cur, end);
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    cur = rr.dnsrr_dptr;
+    r = dns_getdn(pkt, &cur, end, ptr, sizeof(ptr));
+    if (r <= 0 || cur != rr.dnsrr_dend)
+      return DNS_E_PROTOCOL;
+    l += dns_dntop_size(ptr);
+    ++c;
+  }
+  if (r < 0)
+    return DNS_E_PROTOCOL;
+  if (!c)
+    return DNS_E_NODATA;
+
+  /* next, allocate and set up result */
+  ret = malloc(sizeof(*ret) + sizeof(char **) * c + l + dns_stdrr_size(&p));
+  if (!ret)
+    return DNS_E_NOMEM;
+  ret->dnsptr_nrr = c;
+  ret->dnsptr_ptr = (char **)(ret+1);
+
+  /* and 3rd, fill in result, finally */
+  sp = (char*)(ret->dnsptr_ptr + c);
+  c = 0;
+  dns_rewind(&p, qdn);
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    ret->dnsptr_ptr[c] = sp;
+    cur = rr.dnsrr_dptr;
+    dns_getdn(pkt, &cur, end, ptr, sizeof(ptr));
+    sp += dns_dntop(ptr, sp, DNS_MAXNAME);
+    ++c;
+  }
+  dns_stdrr_finish((struct dns_rr_null *)ret, sp, &p);
+  *result = ret;
+  return 0;
+}
+
+struct dns_query *
+dns_submit_a4ptr(struct dns_ctx *ctx, const struct in_addr *addr,
+                 dns_query_ptr_fn *cbck, void *data) {
+  dnsc_t dn[DNS_A4RSIZE];
+  dns_a4todn(addr, 0, dn, sizeof(dn));
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_PTR, DNS_NOSRCH,
+                  dns_parse_ptr, (dns_query_fn *)cbck, data);
+}
+
+struct dns_rr_ptr *
+dns_resolve_a4ptr(struct dns_ctx *ctx, const struct in_addr *addr) {
+  return (struct dns_rr_ptr *)
+    dns_resolve(ctx, dns_submit_a4ptr(ctx, addr, NULL, NULL));
+}
+
+struct dns_query *
+dns_submit_a6ptr(struct dns_ctx *ctx, const struct in6_addr *addr,
+                 dns_query_ptr_fn *cbck, void *data) {
+  dnsc_t dn[DNS_A6RSIZE];
+  dns_a6todn(addr, 0, dn, sizeof(dn));
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_PTR, DNS_NOSRCH,
+                  dns_parse_ptr, (dns_query_fn *)cbck, data);
+}
+
+struct dns_rr_ptr *
+dns_resolve_a6ptr(struct dns_ctx *ctx, const struct in6_addr *addr) {
+  return (struct dns_rr_ptr *)
+    dns_resolve(ctx, dns_submit_a6ptr(ctx, addr, NULL, NULL));
+}

3rdparty/udns/udns_rr_srv.c

@@ -0,0 +1,155 @@
+/* udns_rr_srv.c
+   parse/query SRV IN (rfc2782) records
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+   Copyright 2005 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+
+   2005-09-11:
+   Changed MX parser file into a SRV parser file
+
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "udns.h"
+
+int
+dns_parse_srv(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+              void **result) {
+  struct dns_rr_srv *ret;
+  struct dns_parse p;
+  struct dns_rr rr;
+  int r, l;
+  char *sp;
+  dnsc_t srv[DNS_MAXDN];
+
+  assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_SRV);
+
+  /* first, validate the answer and count size of the result */
+  l = 0;
+  dns_initparse(&p, qdn, pkt, cur, end);
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    cur = rr.dnsrr_dptr + 6;
+    r = dns_getdn(pkt, &cur, end, srv, sizeof(srv));
+    if (r <= 0 || cur != rr.dnsrr_dend)
+      return DNS_E_PROTOCOL;
+    l += dns_dntop_size(srv);
+  }
+  if (r < 0)
+    return DNS_E_PROTOCOL;
+  if (!p.dnsp_nrr)
+    return DNS_E_NODATA;
+
+  /* next, allocate and set up result */
+  l += dns_stdrr_size(&p);
+  ret = malloc(sizeof(*ret) + sizeof(struct dns_srv) * p.dnsp_nrr + l);
+  if (!ret)
+    return DNS_E_NOMEM;
+  ret->dnssrv_nrr = p.dnsp_nrr;
+  ret->dnssrv_srv = (struct dns_srv *)(ret+1);
+
+  /* and 3rd, fill in result, finally */
+  sp = (char*)(ret->dnssrv_srv + p.dnsp_nrr);
+  for (dns_rewind(&p, qdn), r = 0; dns_nextrr(&p, &rr); ++r) {
+    ret->dnssrv_srv[r].name = sp;
+    cur = rr.dnsrr_dptr;
+    ret->dnssrv_srv[r].priority = dns_get16(cur);
+    ret->dnssrv_srv[r].weight = dns_get16(cur+2);
+    ret->dnssrv_srv[r].port = dns_get16(cur+4);
+    cur += 6;
+    dns_getdn(pkt, &cur, end, srv, sizeof(srv));
+    sp += dns_dntop(srv, sp, DNS_MAXNAME);
+  }
+  dns_stdrr_finish((struct dns_rr_null *)ret, sp, &p);
+  *result = ret;
+  return 0;
+}
+
+/* Add a single service or proto name prepending an undescore (_),
+ * according to rfc2782 rules.
+ * Return 0 or the label length.
+ * Routing assumes dn holds enouth space for a single DN label. */
+static int add_sname(dnsc_t *dn, const char *sn) {
+  int l = dns_ptodn(sn, 0, dn + 1, DNS_MAXLABEL-1, NULL);
+  if (l <= 1 || l - 2 != dn[1])
+    /* Should we really check if sn is exactly one label?  Do we care? */
+    return 0;
+  dn[0] = l - 1;
+  dn[1] = '_';
+  return l;
+}
+
+/* Construct a domain name for SRV query from the given name, service and proto.
+ * The code allows any combinations of srv and proto (both are non-NULL,
+ * both NULL, or either one is non-NULL).  Whenever it makes any sense or not
+ * is left as an exercise to programmer.
+ * Return negative value on error (malformed query) or addition query flag(s).
+ */
+static int
+build_srv_dn(dnsc_t *dn, const char *name, const char *srv, const char *proto)
+{
+  int p = 0, l, isabs;
+  if (srv) {
+    l = add_sname(dn + p, srv);
+    if (!l)
+      return -1;
+    p += l;
+  }
+  if (proto) {
+    l = add_sname(dn + p, proto);
+    if (!l)
+      return -1;
+    p += l;
+  }
+  l = dns_ptodn(name, 0, dn + p, DNS_MAXDN - p, &isabs);
+  if (l < 0)
+    return -1;
+  return isabs ? DNS_NOSRCH : 0;
+}
+
+struct dns_query *
+dns_submit_srv(struct dns_ctx *ctx,
+               const char *name, const char *srv, const char *proto,
+               int flags, dns_query_srv_fn *cbck, void *data) {
+  dnsc_t dn[DNS_MAXDN];
+  int r = build_srv_dn(dn, name, srv, proto);
+  if (r < 0) {
+    dns_setstatus (ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return
+    dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_SRV, flags | r,
+                  dns_parse_srv, (dns_query_fn *)cbck, data);
+}
+
+struct dns_rr_srv *
+dns_resolve_srv(struct dns_ctx *ctx,
+                const char *name, const char *srv, const char *proto, int flags)
+{
+  dnsc_t dn[DNS_MAXDN];
+  int r = build_srv_dn(dn, name, srv, proto);
+  if (r < 0) {
+    dns_setstatus(ctx, DNS_E_BADQUERY);
+    return NULL;
+  }
+  return (struct dns_rr_srv *)
+    dns_resolve_dn(ctx, dn, DNS_C_IN, DNS_T_SRV, flags | r, dns_parse_srv);
+}

3rdparty/udns/udns_rr_txt.c

@@ -0,0 +1,98 @@
+/* udns_rr_txt.c
+   parse/query TXT records
+
+   Copyright (C) 2005  Michael Tokarev <mjt@corpit.ru>
+   This file is part of UDNS library, an async DNS stub resolver.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library, in file named COPYING.LGPL; if not,
+   write to the Free Software Foundation, Inc., 59 Temple Place,
+   Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include "udns.h"
+
+int
+dns_parse_txt(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
+              void **result) {
+  struct dns_rr_txt *ret;
+  struct dns_parse p;
+  struct dns_rr rr;
+  int r, l;
+  dnsc_t *sp;
+  dnscc_t *cp, *ep;
+
+  assert(dns_get16(cur+0) == DNS_T_TXT);
+
+  /* first, validate the answer and count size of the result */
+  l = 0;
+  dns_initparse(&p, qdn, pkt, cur, end);
+  while((r = dns_nextrr(&p, &rr)) > 0) {
+    cp = rr.dnsrr_dptr; ep = rr.dnsrr_dend;
+    while(cp < ep) {
+      r = *cp++;
+      if (cp + r > ep)
+        return DNS_E_PROTOCOL;
+      l += r;
+      cp += r;
+    }
+  }
+  if (r < 0)
+    return DNS_E_PROTOCOL;
+  if (!p.dnsp_nrr)
+    return DNS_E_NODATA;
+
+  /* next, allocate and set up result */
+  l +=  (sizeof(struct dns_txt) + 1) * p.dnsp_nrr + dns_stdrr_size(&p);
+  ret = malloc(sizeof(*ret) + l);
+  if (!ret)
+    return DNS_E_NOMEM;
+  ret->dnstxt_nrr = p.dnsp_nrr;
+  ret->dnstxt_txt = (struct dns_txt *)(ret+1);
+
+  /* and 3rd, fill in result, finally */
+  sp = (dnsc_t*)(ret->dnstxt_txt + p.dnsp_nrr);
+  for(dns_rewind(&p, qdn), r = 0; dns_nextrr(&p, &rr) > 0; ++r) {
+    ret->dnstxt_txt[r].txt = sp;
+    cp = rr.dnsrr_dptr; ep = rr.dnsrr_dend;
+    while(cp < ep) {
+      l = *cp++;
+      memcpy(sp, cp, l);
+      sp += l;
+      cp += l;
+    }
+    ret->dnstxt_txt[r].len = sp - ret->dnstxt_txt[r].txt;
+    *sp++ = '\0';
+  }
+  dns_stdrr_finish((struct dns_rr_null *)ret, (char*)sp, &p);
+  *result = ret;
+  return 0;
+}
+
+struct dns_query *
+dns_submit_txt(struct dns_ctx *ctx, const char *name, int qcls, int flags,
+               dns_query_txt_fn *cbck, void *data) {
+  return
+    dns_submit_p(ctx, name, qcls, DNS_T_TXT, flags,
+                 dns_parse_txt, (dns_query_fn *)cbck, data);
+}
+
+struct dns_rr_txt *
+dns_resolve_txt(struct dns_ctx *ctx, const char *name, int qcls, int flags) {
+  return (struct dns_rr_txt *)
+    dns_resolve_p(ctx, name, qcls, DNS_T_TXT, flags, dns_parse_txt);
+}

CMakeLists.txt

@@ -1,8 +1,26 @@
-cmake_minimum_required (VERSION 2.6.4)
+cmake_minimum_required (VERSION 2.8.11)
+
+if(COMMAND cmake_policy)
+   if(POLICY CMP0054)
+       cmake_policy(SET CMP0054 NEW)
+   endif()
+   if(POLICY CMP0042)
+       cmake_policy(SET CMP0042 NEW)
+   endif()
+endif()
+
 include (CheckFunctionExists)
 include (CheckIncludeFile)
+include (CheckLibraryExists)
 include (CheckCXXSourceCompiles)
 include (CheckCXXCompilerFlag)
+include (GenerateExportHeader)
+
+# using 10.7 because boost requires libc++ and 10.6 doesn't include it
+set(CMAKE_OSX_DEPLOYMENT_TARGET 10.7)
+
+# only relevant for building shared libs but let's set it regardless
+set(CMAKE_OSX_RPATH 1)
 
 project(SimGear)
 
@@ -34,7 +52,7 @@ SET(CPACK_INSTALL_CMAKE_PROJECTS  ${CMAKE_CURRENT_BINARY_DIR};SimGear;ALL;/)
 
 # split version string into components, note CMAKE_MATCH_0 is the entire regexp match
 string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)" CPACK_PACKAGE_VERSION ${SIMGEAR_VERSION} )
-set(CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1}) 
+set(CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
 set(CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
 set(CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
 
@@ -62,12 +80,7 @@ endif(NOT CMAKE_BUILD_TYPE)
 # Determine name of library installation directory, i.e. "lib" vs "lib64", which
 # differs between all Debian-based vs all other Linux distros.
 # See cmake bug #11964, http://cmake.org/gitweb?p=cmake.git;a=commit;h=126c993d
-# GNUInstallDirs requires CMake >= 2.8.5, use own file for older cmake
-if(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
-  include(GNUInstallDirs)
-else(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
-  include(OldGNUInstallDirs)
-endif(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
+include(GNUInstallDirs)
 message(STATUS "Library installation directory: ${CMAKE_INSTALL_LIBDIR}")
 
 #####################################################################################
@@ -104,6 +117,7 @@ option(ENABLE_RTI       "Set to ON to build SimGear with RTI support" OFF)
 option(ENABLE_TESTS     "Set to OFF to disable building SimGear's test applications" ON)
 option(ENABLE_SOUND     "Set to OFF to disable building SimGear's sound support" ON)
 option(ENABLE_PKGUTIL   "Set to ON to build the sg_pkgutil application (default)" ON)
+option(ENABLE_DNS       "Set to ON to use udns library and DNS service resolver" ON)
 
 if (MSVC)
   GET_FILENAME_COMPONENT(PARENT_DIR ${PROJECT_BINARY_DIR} PATH)
@@ -161,13 +175,23 @@ endif (MSVC AND MSVC_3RDPARTY_ROOT)
 
 if(APPLE)
   find_library(COCOA_LIBRARY Cocoa)
+
+# this should be handled by setting CMAKE_OSX_DEPLOYMENT_TARGET
+# but it's not working reliably, so forcing it for now
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmacosx-version-min=10.7")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.7")
+endif()
+
+if(${CMAKE_SYSTEM_NAME} MATCHES "Linux" OR
+	${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+    find_package(Threads REQUIRED)
 endif()
 
 # Somehow this only works if included before searching for Boost...
 include(BoostTestTargets)
 
 find_package(Boost REQUIRED)
-set (BOOST_CXX_FLAGS "-DBOOST_MULTI_INDEX_DISABLE_SERIALIZATION -DBOOST_BIMAP_DISABLE_SERIALIZATION")
+set (BOOST_CXX_FLAGS "-DBOOST_BIMAP_DISABLE_SERIALIZATION")
 
 if(SIMGEAR_HEADLESS)
     message(STATUS "SimGear mode: HEADLESS")
@@ -175,17 +199,17 @@ if(SIMGEAR_HEADLESS)
 else()
     message(STATUS "SimGear mode: NORMAL")
     find_package(OpenGL REQUIRED)
-    
+
     if (ENABLE_SOUND)
         find_package(OpenAL REQUIRED)
         message(STATUS "Sound support: ENABLED")
     endif(ENABLE_SOUND)
-    
+
     find_package(OpenSceneGraph 3.2.0 REQUIRED osgText osgSim osgDB osgParticle osgGA osgViewer osgUtil)
 endif(SIMGEAR_HEADLESS)
 
 find_package(ZLIB REQUIRED)
-find_package(Threads REQUIRED)
+find_package(CURL REQUIRED)
 
 if (SYSTEM_EXPAT)
     message(STATUS "Requested to use system Expat library, forcing SIMGEAR_SHARED to true")
@@ -197,8 +221,8 @@ else()
     # XML_STATIC is important to avoid sg_expat_external.h
     # declaring symbols as declspec(import)
     add_definitions(-DHAVE_EXPAT_CONFIG_H -DXML_STATIC)
-    set(EXPAT_INCLUDE_DIRS 
-	    ${PROJECT_SOURCE_DIR}/3rdparty/expat 
+    set(EXPAT_INCLUDE_DIRS
+	    ${PROJECT_SOURCE_DIR}/3rdparty/expat
 	    ${PROJECT_BINARY_DIR}/3rdparty/expat)
 endif(SYSTEM_EXPAT)
 
@@ -275,12 +299,12 @@ SET(CMAKE_MINSIZEREL_POSTFIX "" CACHE STRING "add a postfix, usually empty on wi
 
 # isnan might not be real symbol, so can't check using function_exists
 check_cxx_source_compiles(
-    "#include <cmath> 
+    "#include <cmath>
     int main() { return isnan(0.0);} "
     HAVE_ISNAN)
 
 check_cxx_source_compiles(
-    "#include <cmath> 
+    "#include <cmath>
     int main() { return std::isnan(0.0);} "
     HAVE_STD_ISNAN)
 
@@ -297,8 +321,12 @@ if(CMAKE_COMPILER_IS_GNUCXX)
 endif(CMAKE_COMPILER_IS_GNUCXX)
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-   set(WARNING_FLAGS_CXX "-Wall -Wno-overloaded-virtual")
-   set(WARNING_FLAGS_C   "-Wall")
+    # Boost redeclares class members
+    set(WARNING_FLAGS_CXX "-Wall -Wno-overloaded-virtual -Wno-redeclared-class-member")
+    set(WARNING_FLAGS_C   "-Wall")
+    set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY "libc++")
+    set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LANGUAGE_STANDARD "c++11")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -stdlib=libc++")
 endif()
 
 if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
@@ -320,16 +348,16 @@ if(WIN32)
         # foreach(warning 4244 4251 4267 4275 4290 4786 4305 4996)
         #     SET(WARNING_FLAGS "${WARNING_FLAGS} /wd${warning}")
         # endforeach(warning)
-        
+
         set(MSVC_FLAGS "-DWIN32 -DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS /wd4996 /wd4250 -Dstrdup=_strdup")
         if (${MSVC_VERSION} GREATER 1599)
             set( MSVC_LD_FLAGS "/FORCE:MULTIPLE" )
         endif (${MSVC_VERSION} GREATER 1599)
     endif(MSVC)
-    
+
     # assumed on Windows
     set(HAVE_GETLOCALTIME 1)
-    
+
     set( WINSOCK_LIBRARY "ws2_32.lib" )
     set( RT_LIBRARY "winmm" )
 endif(WIN32)
@@ -338,16 +366,17 @@ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS_C} ${MSVC_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS_CXX} ${MSVC_FLAGS} ${BOOST_CXX_FLAGS}")
 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${MSVC_LD_FLAGS}")
 
-# use BEFORE to ensure local directories are used first, 
+# use BEFORE to ensure local directories are used first,
 # ahead of system-installed libs
 include_directories(BEFORE ${PROJECT_SOURCE_DIR})
 include_directories(BEFORE ${PROJECT_SOURCE_DIR}/simgear/canvas/ShivaVG/include)
 include_directories(BEFORE ${PROJECT_BINARY_DIR}/simgear)
 
-include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS} 
-    ${Boost_INCLUDE_DIRS} 
-    ${ZLIB_INCLUDE_DIR} 
+include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS}
+    ${Boost_INCLUDE_DIRS}
+    ${ZLIB_INCLUDE_DIR}
     ${OPENAL_INCLUDE_DIR}
+    ${CURL_INCLUDE_DIRS}
 )
 
 add_definitions(-DHAVE_CONFIG_H)
@@ -376,7 +405,8 @@ set(TEST_LIBS_INTERNAL_CORE
     ${WINSOCK_LIBRARY}
     ${RT_LIBRARY}
     ${DL_LIBRARY}
-    ${COCOA_LIBRARY})
+    ${COCOA_LIBRARY}
+    ${CURL_LIBRARIES})
 set(TEST_LIBS SimGearCore ${TEST_LIBS_INTERNAL_CORE})
 
 if(NOT SIMGEAR_HEADLESS)
@@ -386,10 +416,51 @@ endif()
 install (FILES ${PROJECT_BINARY_DIR}/simgear/simgear_config.h  DESTINATION include/simgear/)
 
 include_directories(3rdparty/utf8/source)
+if (ENABLE_DNS)
+    message(STATUS "DNS resolver: ENABLED")
+    include_directories(3rdparty/udns)
+else()
+    message(STATUS "DNS resolver: DISABLED")
+endif()
+
 
 add_subdirectory(3rdparty)
 add_subdirectory(simgear)
 
+#-----------------------------------------------------------------------------
+### Export stuff, see https://cmake.org/cmake/help/v3.2/manual/cmake-packages.7.html#creating-packages
+#-----------------------------------------------------------------------------
+
+generate_export_header(SimGearCore)
+if(NOT SIMGEAR_HEADLESS)
+  generate_export_header(SimGearScene)
+endif()
+
+include(CMakePackageConfigHelpers)
+
+write_basic_package_version_file(
+  "${CMAKE_CURRENT_BINARY_DIR}/SimGear/SimGearConfigVersion.cmake"
+  VERSION ${SIMGEAR_VERSION}
+  COMPATIBILITY AnyNewerVersion
+)
+
+configure_file(SimGearConfig.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/SimGear/SimGearConfig.cmake"
+  @ONLY
+)
+
+set(ConfigPackageLocation lib/cmake/SimGear)
+install(EXPORT SimGearTargets
+  DESTINATION ${ConfigPackageLocation}
+)
+install(
+  FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/SimGear/SimGearConfig.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/SimGear/SimGearConfigVersion.cmake"
+  DESTINATION ${ConfigPackageLocation}
+  COMPONENT Devel
+)
+
 #-----------------------------------------------------------------------------
 ### uninstall target
 #-----------------------------------------------------------------------------
@@ -399,5 +470,3 @@ CONFIGURE_FILE(
   IMMEDIATE @ONLY)
 ADD_CUSTOM_TARGET(uninstall
   "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")
-  
-

CMakeModules/OldGNUInstallDirs.cmake

@@ -1,182 +0,0 @@
-# - Define GNU standard installation directories
-# Provides install directory variables as defined for GNU software:
-#  http://www.gnu.org/prep/standards/html_node/Directory-Variables.html
-# Inclusion of this module defines the following variables:
-#  CMAKE_INSTALL_<dir>      - destination for files of a given type
-#  CMAKE_INSTALL_FULL_<dir> - corresponding absolute path
-# where <dir> is one of:
-#  BINDIR           - user executables (bin)
-#  SBINDIR          - system admin executables (sbin)
-#  LIBEXECDIR       - program executables (libexec)
-#  SYSCONFDIR       - read-only single-machine data (etc)
-#  SHAREDSTATEDIR   - modifiable architecture-independent data (com)
-#  LOCALSTATEDIR    - modifiable single-machine data (var)
-#  LIBDIR           - object code libraries (lib or lib64)
-#  INCLUDEDIR       - C header files (include)
-#  OLDINCLUDEDIR    - C header files for non-gcc (/usr/include)
-#  DATAROOTDIR      - read-only architecture-independent data root (share)
-#  DATADIR          - read-only architecture-independent data (DATAROOTDIR)
-#  INFODIR          - info documentation (DATAROOTDIR/info)
-#  LOCALEDIR        - locale-dependent data (DATAROOTDIR/locale)
-#  MANDIR           - man documentation (DATAROOTDIR/man)
-#  DOCDIR           - documentation root (DATAROOTDIR/doc/PROJECT_NAME)
-# Each CMAKE_INSTALL_<dir> value may be passed to the DESTINATION options of
-# install() commands for the corresponding file type.  If the includer does
-# not define a value the above-shown default will be used and the value will
-# appear in the cache for editing by the user.
-# Each CMAKE_INSTALL_FULL_<dir> value contains an absolute path constructed
-# from the corresponding destination by prepending (if necessary) the value
-# of CMAKE_INSTALL_PREFIX.
-
-#=============================================================================
-# Copyright 2011 Nikita Krupen'ko <krnekit@gmail.com>
-# Copyright 2011 Kitware, Inc.
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-# (To distribute this file outside of CMake, substitute the full
-#  License text for the above reference.)
-
-# Installation directories
-#
-if(NOT DEFINED CMAKE_INSTALL_BINDIR)
-  set(CMAKE_INSTALL_BINDIR "bin" CACHE PATH "user executables (bin)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_SBINDIR)
-  set(CMAKE_INSTALL_SBINDIR "sbin" CACHE PATH "system admin executables (sbin)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_LIBEXECDIR)
-  set(CMAKE_INSTALL_LIBEXECDIR "libexec" CACHE PATH "program executables (libexec)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_SYSCONFDIR)
-  set(CMAKE_INSTALL_SYSCONFDIR "etc" CACHE PATH "read-only single-machine data (etc)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_SHAREDSTATEDIR)
-  set(CMAKE_INSTALL_SHAREDSTATEDIR "com" CACHE PATH "modifiable architecture-independent data (com)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_LOCALSTATEDIR)
-  set(CMAKE_INSTALL_LOCALSTATEDIR "var" CACHE PATH "modifiable single-machine data (var)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
-  set(_LIBDIR_DEFAULT "lib")
-  # Override this default 'lib' with 'lib64' iff:
-  #  - we are on Linux system but NOT cross-compiling
-  #  - we are NOT on debian
-  #  - we are on a 64 bits system
-  # reason is: amd64 ABI: http://www.x86-64.org/documentation/abi.pdf
-  # Note that the future of multi-arch handling may be even
-  # more complicated than that: http://wiki.debian.org/Multiarch
-  if(CMAKE_SYSTEM_NAME MATCHES "Linux"
-      AND NOT CMAKE_CROSSCOMPILING
-      AND NOT EXISTS "/etc/debian_version")
-    if(NOT DEFINED CMAKE_SIZEOF_VOID_P)
-      message(AUTHOR_WARNING
-        "Unable to determine default CMAKE_INSTALL_LIBDIR directory because no target architecture is known. "
-        "Please enable at least one language before including GNUInstallDirs.")
-    else()
-      if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
-        set(_LIBDIR_DEFAULT "lib64")
-      endif()
-    endif()
-  endif()
-  set(CMAKE_INSTALL_LIBDIR "${_LIBDIR_DEFAULT}" CACHE PATH "object code libraries (${_LIBDIR_DEFAULT})")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_INCLUDEDIR)
-  set(CMAKE_INSTALL_INCLUDEDIR "include" CACHE PATH "C header files (include)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_OLDINCLUDEDIR)
-  set(CMAKE_INSTALL_OLDINCLUDEDIR "/usr/include" CACHE PATH "C header files for non-gcc (/usr/include)")
-endif()
-
-if(NOT DEFINED CMAKE_INSTALL_DATAROOTDIR)
-  set(CMAKE_INSTALL_DATAROOTDIR "share" CACHE PATH "read-only architecture-independent data root (share)")
-endif()
-
-#-----------------------------------------------------------------------------
-# Values whose defaults are relative to DATAROOTDIR.  Store empty values in
-# the cache and store the defaults in local variables if the cache values are
-# not set explicitly.  This auto-updates the defaults as DATAROOTDIR changes.
-
-if(NOT CMAKE_INSTALL_DATADIR)
-  set(CMAKE_INSTALL_DATADIR "" CACHE PATH "read-only architecture-independent data (DATAROOTDIR)")
-  set(CMAKE_INSTALL_DATADIR "${CMAKE_INSTALL_DATAROOTDIR}")
-endif()
-
-if(NOT CMAKE_INSTALL_INFODIR)
-  set(CMAKE_INSTALL_INFODIR "" CACHE PATH "info documentation (DATAROOTDIR/info)")
-  set(CMAKE_INSTALL_INFODIR "${CMAKE_INSTALL_DATAROOTDIR}/info")
-endif()
-
-if(NOT CMAKE_INSTALL_LOCALEDIR)
-  set(CMAKE_INSTALL_LOCALEDIR "" CACHE PATH "locale-dependent data (DATAROOTDIR/locale)")
-  set(CMAKE_INSTALL_LOCALEDIR "${CMAKE_INSTALL_DATAROOTDIR}/locale")
-endif()
-
-if(NOT CMAKE_INSTALL_MANDIR)
-  set(CMAKE_INSTALL_MANDIR "" CACHE PATH "man documentation (DATAROOTDIR/man)")
-  set(CMAKE_INSTALL_MANDIR "${CMAKE_INSTALL_DATAROOTDIR}/man")
-endif()
-
-if(NOT CMAKE_INSTALL_DOCDIR)
-  set(CMAKE_INSTALL_DOCDIR "" CACHE PATH "documentation root (DATAROOTDIR/doc/PROJECT_NAME)")
-  set(CMAKE_INSTALL_DOCDIR "${CMAKE_INSTALL_DATAROOTDIR}/doc/${PROJECT_NAME}")
-endif()
-
-#-----------------------------------------------------------------------------
-
-mark_as_advanced(
-  CMAKE_INSTALL_BINDIR
-  CMAKE_INSTALL_SBINDIR
-  CMAKE_INSTALL_LIBEXECDIR
-  CMAKE_INSTALL_SYSCONFDIR
-  CMAKE_INSTALL_SHAREDSTATEDIR
-  CMAKE_INSTALL_LOCALSTATEDIR
-  CMAKE_INSTALL_LIBDIR
-  CMAKE_INSTALL_INCLUDEDIR
-  CMAKE_INSTALL_OLDINCLUDEDIR
-  CMAKE_INSTALL_DATAROOTDIR
-  CMAKE_INSTALL_DATADIR
-  CMAKE_INSTALL_INFODIR
-  CMAKE_INSTALL_LOCALEDIR
-  CMAKE_INSTALL_MANDIR
-  CMAKE_INSTALL_DOCDIR
-  )
-
-# Result directories
-#
-foreach(dir
-    BINDIR
-    SBINDIR
-    LIBEXECDIR
-    SYSCONFDIR
-    SHAREDSTATEDIR
-    LOCALSTATEDIR
-    LIBDIR
-    INCLUDEDIR
-    OLDINCLUDEDIR
-    DATAROOTDIR
-    DATADIR
-    INFODIR
-    LOCALEDIR
-    MANDIR
-    DOCDIR
-    )
-  if(NOT IS_ABSOLUTE ${CMAKE_INSTALL_${dir}})
-    set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_${dir}}")
-  else()
-    set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_${dir}}")
-  endif()
-endforeach()

SimGearConfig.cmake.in

@@ -0,0 +1,16 @@
+include(CMakeFindDependencyMacro)
+
+find_dependency(ZLIB)
+find_dependency(Threads)
+
+# OSG
+
+set(SIMGEAR_HEADLESS @SIMGEAR_HEADLESS@)
+set(SIMGEAR_SOUND @ENABLE_SOUND@)
+
+# OpenAL isn't a public dependency, so maybe not needed
+#if (SIMGEAR_SOUND)
+#  find_dependency(OpenAL)
+#endif()
+
+include("${CMAKE_CURRENT_LIST_DIR}/SimGearTargets.cmake")

simgear/CMakeLists.txt

@@ -1,7 +1,7 @@
 
 file(WRITE ${PROJECT_BINARY_DIR}/simgear/version.h "#define SIMGEAR_VERSION ${SIMGEAR_VERSION}")
 
-foreach( mylibfolder 
+foreach( mylibfolder
         bucket
         bvh
         debug
@@ -54,9 +54,11 @@ if(SIMGEAR_SHARED)
     set_property(TARGET SimGearCore PROPERTY LINKER_LANGUAGE CXX)
     set_property(TARGET SimGearCore PROPERTY VERSION   ${SIMGEAR_VERSION})
     set_property(TARGET SimGearCore PROPERTY SOVERSION ${SIMGEAR_SOVERSION})
-    install(TARGETS SimGearCore EXPORT SimGearCoreConfig LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
-    install(EXPORT SimGearCoreConfig DESTINATION share/SimGearCore)
-    
+    install(TARGETS SimGearCore
+            EXPORT SimGearTargets
+            LIBRARY DESTINATION
+            ${CMAKE_INSTALL_LIBDIR})
+
     if(NOT SIMGEAR_HEADLESS)
         add_library(SimGearScene SHARED ${sceneSources})
         set_property(TARGET SimGearScene PROPERTY LINKER_LANGUAGE CXX)
@@ -64,10 +66,12 @@ if(SIMGEAR_SHARED)
         set_property(TARGET SimGearScene PROPERTY SOVERSION ${SIMGEAR_SOVERSION})
 
         # EXPORT SimGearSceneConfig
-        install(TARGETS SimGearScene LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR} )
-    #    install(EXPORT SimGearSceneConfig DESTINATION share/SimGearScene)
+        install(TARGETS SimGearScene
+                EXPORT SimGearTargets
+                LIBRARY
+                DESTINATION ${CMAKE_INSTALL_LIBDIR} )
     endif()
-    
+
 else()
     message(STATUS "Library building mode: STATIC LIBRARIES")
 
@@ -90,8 +94,10 @@ else()
 	endforeach()
 
     add_library(SimGearCore STATIC ${coreSources} ${localExpatSources})
-    install(TARGETS SimGearCore ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-    
+    install(TARGETS SimGearCore
+            EXPORT SimGearTargets
+            ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
     if(NOT SIMGEAR_HEADLESS)
 		get_property(FG_GROUPS_SCENE_SOURCES_C GLOBAL PROPERTY FG_GROUPS_SCENE_SOURCES_C)
 		string(REPLACE "@" ";" groups ${FG_GROUPS_SCENE_SOURCES_C} )
@@ -112,7 +118,9 @@ else()
 		endforeach()
 
         add_library(SimGearScene STATIC ${sceneSources})
-        install(TARGETS SimGearScene ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+        install(TARGETS SimGearScene
+                EXPORT SimGearTargets
+                ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
     endif(NOT SIMGEAR_HEADLESS)
 endif(SIMGEAR_SHARED)
 
@@ -122,7 +130,8 @@ target_link_libraries(SimGearCore
     ${DL_LIBRARY}
     ${EXPAT_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT}
-    ${COCOA_LIBRARY})
+    ${COCOA_LIBRARY}
+    ${CURL_LIBRARIES})
 
 if(NOT SIMGEAR_HEADLESS)
     target_link_libraries(SimGearScene

simgear/bucket/newbucket.cxx

@@ -286,6 +286,54 @@ double SGBucket::get_height_m() const {
     return SG_BUCKET_SPAN * degree_height;
 }
 
+unsigned int SGBucket::siblings( int dx, int dy, std::vector<SGBucket>& buckets ) const 
+{
+    if (!isValid()) {
+        SG_LOG(SG_TERRAIN, SG_WARN, "SGBucket::sibling: requesting sibling of invalid bucket");
+        return 0;
+    }
+    
+    double src_span = sg_bucket_span( get_center_lat() );
+   
+    double clat = get_center_lat() + dy * SG_BUCKET_SPAN;
+    // return invalid here instead of clipping, so callers can discard
+    // invalid buckets without having to check if it's an existing one
+    if ((clat < -90.0) || (clat > 90.0)) {
+        return 0;
+    }
+    
+    // find the lon span for the new latitude
+    double trg_span = sg_bucket_span( clat );
+    
+    // if target span < src_span, return multiple buckets...
+    if ( trg_span < src_span ) {
+        // calc center longitude of westernmost sibling
+        double start_lon = get_center_lat() - src_span/2 + trg_span/2;
+        
+        unsigned int num_buckets = src_span/trg_span;
+        for ( unsigned int x = 0; x < num_buckets; x++ ) {
+            double tmp = start_lon + x * trg_span;
+            tmp = SGMiscd::normalizePeriodic(-180.0, 180.0, tmp);
+            
+            SGBucket b;
+            b.innerSet(tmp, clat);
+            
+            buckets.push_back( b );
+        }
+    } else {
+        // just return the single sibling
+        double tmp = get_center_lon() + dx * trg_span;
+        tmp = SGMiscd::normalizePeriodic(-180.0, 180.0, tmp);
+    
+        SGBucket b;
+        b.innerSet(tmp, clat);
+        
+        buckets.push_back( b );
+    }
+    
+    return buckets.size();
+}
+
 SGBucket SGBucket::sibling(int dx, int dy) const
 {
     if (!isValid()) {

simgear/bucket/newbucket.hxx

@@ -288,6 +288,11 @@ public:
      */
     SGBucket sibling(int dx, int dy) const;
     
+    /**
+     * @return multiple buckets offset from this by dx,dy
+     */
+    unsigned int siblings(int dz, int dy, std::vector<SGBucket>& buckets) const;
+    
     // friends
 
     friend std::ostream& operator<< ( std::ostream&, const SGBucket& );

simgear/bvh/BVHGroup.hxx

@@ -43,7 +43,7 @@ public:
     void removeChild(BVHNode* child);
     
     unsigned getNumChildren() const
-    { return _children.size(); }
+    { return static_cast<unsigned>(_children.size()); }
     const BVHNode* getChild(unsigned i) const
     { if (_children.size() <= i) return 0; return _children[i]; }
     BVHNode* getChild(unsigned i)

simgear/bvh/BVHStaticData.hxx

@@ -31,13 +31,13 @@ public:
     virtual ~BVHStaticData() {}
     
     unsigned addVertex(const SGVec3f& vertex)
-    { _vertices.push_back(vertex); return _vertices.size() - 1; }
+    { _vertices.push_back(vertex); return static_cast<unsigned>(_vertices.size() - 1); }
     const SGVec3f& getVertex(unsigned i) const
     { return _vertices[i]; }
     
     
     unsigned addMaterial(const BVHMaterial* material)
-    { _materials.push_back(material); return _materials.size() - 1; }
+    { _materials.push_back(material); return static_cast<unsigned>(_materials.size() - 1); }
     const BVHMaterial* getMaterial(unsigned i) const
     { if (_materials.size() <= i) return 0; return _materials[i]; }
 

simgear/canvas/CanvasSystemAdapter.hxx

@@ -37,7 +37,7 @@ namespace canvas
       virtual FontPtr getFont(const std::string& name) const = 0;
       virtual void addCamera(osg::Camera* camera) const = 0;
       virtual void removeCamera(osg::Camera* camera) const = 0;
-      virtual osg::Image* getImage(const std::string& path) const = 0;
+      virtual osg::ref_ptr<osg::Image> getImage(const std::string& path) const = 0;
       virtual SGSubsystem* getSubsystem(const std::string& name) const = 0;
       virtual HTTP::Client* getHTTPClient() const = 0;
   };

simgear/canvas/elements/CanvasElement.cxx

@@ -207,19 +207,6 @@ namespace canvas
   //----------------------------------------------------------------------------
   Element::~Element()
   {
-    if( !_transform.valid() )
-      return;
-
-    for(unsigned int i = 0; i < _transform->getNumChildren(); ++i)
-    {
-      OSGUserData* ud =
-        static_cast<OSGUserData*>(_transform->getChild(i)->getUserData());
-
-      if( ud )
-        // Ensure parent is cleared to prevent accessing released memory if an
-        // element somehow survives longer than his parent.
-        ud->element->_parent = 0;
-    }
   }
 
   //----------------------------------------------------------------------------
@@ -246,7 +233,7 @@ namespace canvas
   //----------------------------------------------------------------------------
   ElementPtr Element::getParent() const
   {
-    return _parent;
+    return _parent.lock();
   }
 
   //----------------------------------------------------------------------------
@@ -324,8 +311,9 @@ namespace canvas
   //----------------------------------------------------------------------------
   bool Element::ascend(EventVisitor& visitor)
   {
-    if( _parent )
-      return _parent->accept(visitor);
+    ElementPtr parent = getParent();
+    if( parent )
+      return parent->accept(visitor);
     return true;
   }
 
@@ -374,9 +362,9 @@ namespace canvas
     EventPropagationPath path;
     path.push_back( EventTarget(this) );
 
-    for( Element* parent = _parent;
-                  parent != NULL;
-                  parent = parent->_parent )
+    for( ElementPtr parent = getParent();
+                    parent.valid();
+                    parent = parent->getParent() )
       path.push_front( EventTarget(parent) );
 
     CanvasPtr canvas = _canvas.lock();
@@ -772,7 +760,7 @@ namespace canvas
   Element::Element( const CanvasWeakPtr& canvas,
                     const SGPropertyNode_ptr& node,
                     const Style& parent_style,
-                    Element* parent ):
+                    ElementWeakPtr parent ):
     PropertyBasedElement(node),
     _canvas( canvas ),
     _parent( parent ),
@@ -871,11 +859,12 @@ namespace canvas
   Element::getParentStyle(const SGPropertyNode* child) const
   {
     // Try to get value from parent...
-    if( _parent )
+    ElementPtr parent = getParent();
+    if( parent )
     {
       Style::const_iterator style =
-        _parent->_style.find(child->getNameString());
-      if( style != _parent->_style.end() )
+        parent->_style.find(child->getNameString());
+      if( style != parent->_style.end() )
         return style->second;
     }
 

simgear/canvas/elements/CanvasElement.hxx

@@ -232,8 +232,8 @@ namespace canvas
 
       class RelativeScissor;
 
-      CanvasWeakPtr _canvas;
-      Element      *_parent;
+      CanvasWeakPtr   _canvas;
+      ElementWeakPtr  _parent;
 
       mutable uint32_t _attributes_dirty;
 
@@ -256,7 +256,7 @@ namespace canvas
       Element( const CanvasWeakPtr& canvas,
                const SGPropertyNode_ptr& node,
                const Style& parent_style,
-               Element* parent );
+               ElementWeakPtr parent );
 
       /**
        * Returns false on first call and true on any successive call. Use to

simgear/canvas/elements/CanvasGroup.cxx

@@ -70,7 +70,7 @@ namespace canvas
   Group::Group( const CanvasWeakPtr& canvas,
                 const SGPropertyNode_ptr& node,
                 const Style& parent_style,
-                Element* parent ):
+                ElementWeakPtr parent ):
     Element(canvas, node, parent_style, parent)
   {
     staticInit();

simgear/canvas/elements/CanvasGroup.hxx

@@ -45,7 +45,7 @@ namespace canvas
       Group( const CanvasWeakPtr& canvas,
              const SGPropertyNode_ptr& node,
              const Style& parent_style = Style(),
-             Element* parent = 0 );
+             ElementWeakPtr parent = 0 );
       virtual ~Group();
 
       ElementPtr createChild( const std::string& type,

simgear/canvas/elements/CanvasImage.cxx

@@ -112,7 +112,7 @@ namespace canvas
   Image::Image( const CanvasWeakPtr& canvas,
                 const SGPropertyNode_ptr& node,
                 const Style& parent_style,
-                Element* parent ):
+                ElementWeakPtr parent ):
     Element(canvas, node, parent_style, parent),
     _texture(new osg::Texture2D),
     _node_src_rect( node->getNode("source", 0, true) ),
@@ -155,8 +155,9 @@ namespace canvas
   //----------------------------------------------------------------------------
   Image::~Image()
   {
-    if( _http_request )
-      _http_request->abort("image destroyed");
+      if( _http_request ) {
+          Canvas::getSystemAdapter()->getHTTPClient()->cancelRequest(_http_request, "image destroyed");
+      }
   }
 
   //----------------------------------------------------------------------------
@@ -463,7 +464,7 @@ namespace canvas
   }
 
   //----------------------------------------------------------------------------
-  void Image::setImage(osg::Image *img)
+  void Image::setImage(osg::ref_ptr<osg::Image> img)
   {
     // remove canvas...
     setSrcCanvas( CanvasPtr() );
@@ -618,7 +619,7 @@ namespace canvas
       // Abort pending request
       if( _http_request )
       {
-        _http_request->abort("setting new image");
+          Canvas::getSystemAdapter()->getHTTPClient()->cancelRequest(_http_request, "setting new image");
         _http_request.reset();
       }
 

simgear/canvas/elements/CanvasImage.hxx

@@ -50,7 +50,7 @@ namespace canvas
       Image( const CanvasWeakPtr& canvas,
              const SGPropertyNode_ptr& node,
              const Style& parent_style = Style(),
-             Element* parent = 0 );
+             ElementWeakPtr parent = 0 );
       virtual ~Image();
 
       virtual void update(double dt);
@@ -59,7 +59,7 @@ namespace canvas
       void setSrcCanvas(CanvasPtr canvas);
       CanvasWeakPtr getSrcCanvas() const;
 
-      void setImage(osg::Image *img);
+      void setImage(osg::ref_ptr<osg::Image> img);
       void setFill(const std::string& fill);
 
       /**

simgear/canvas/elements/CanvasMap.cxx

@@ -44,6 +44,7 @@ namespace canvas
 
   //----------------------------------------------------------------------------
   const std::string GEO = "-geo";
+  const std::string HDG = "hdg";
   const std::string Map::TYPE_NAME = "map";
 
   //----------------------------------------------------------------------------
@@ -61,7 +62,7 @@ namespace canvas
   Map::Map( const CanvasWeakPtr& canvas,
             const SGPropertyNode_ptr& node,
             const Style& parent_style,
-            Element* parent ):
+            ElementWeakPtr parent ):
     Group(canvas, node, parent_style, parent),
     // TODO make projection configurable
     _projection(new SansonFlamsteedProjection),
@@ -112,87 +113,50 @@ namespace canvas
   //----------------------------------------------------------------------------
   void Map::childAdded(SGPropertyNode* parent, SGPropertyNode* child)
   {
-    if( !boost::ends_with(child->getNameString(), GEO) )
+    if( boost::ends_with(child->getNameString(), GEO) )
+      _geo_nodes[child].reset(new GeoNodePair());
+    else if( parent != _node && child->getNameString() == HDG )
+      _hdg_nodes.insert(child);
+    else
       return Element::childAdded(parent, child);
-
-    _geo_nodes[child].reset(new GeoNodePair());
   }
 
   //----------------------------------------------------------------------------
   void Map::childRemoved(SGPropertyNode* parent, SGPropertyNode* child)
   {
-    if( !boost::ends_with(child->getNameString(), GEO) )
-      return Element::childRemoved(parent, child);
-
-    // TODO remove from other node
-    _geo_nodes.erase(child);
-  }
-
-  //----------------------------------------------------------------------------
-  void Map::valueChanged(SGPropertyNode * child)
-  {
-    const std::string& name = child->getNameString();
-
-    if( !boost::ends_with(name, GEO) )
-      return Group::valueChanged(child);
-
-    GeoNodes::iterator it_geo_node = _geo_nodes.find(child);
-    if( it_geo_node == _geo_nodes.end() )
-      LOG_GEO_RET("geo node not found!")
-    GeoNodePair* geo_node = it_geo_node->second.get();
-
-    geo_node->setDirty();
-
-    if( geo_node->getStatus() & GeoNodePair::INCOMPLETE )
+    if( boost::ends_with(child->getNameString(), GEO) )
+      // TODO remove from other node
+      _geo_nodes.erase(child);
+    else if( parent != _node && child->getName() == HDG )
     {
-      // Detect lat, lon tuples...
-      GeoCoord coord = parseGeoCoord(child->getStringValue());
-      int index_other = -1;
+      _hdg_nodes.erase(child);
 
-      switch( coord.type )
-      {
-        case GeoCoord::LATITUDE:
-          index_other = child->getIndex() + 1;
-          geo_node->setNodeLat(child);
-          break;
-        case GeoCoord::LONGITUDE:
-          index_other = child->getIndex() - 1;
-          geo_node->setNodeLon(child);
-          break;
-        default:
-          LOG_GEO_RET("Invalid geo coord")
-      }
-
-      SGPropertyNode *other = child->getParent()->getChild(name, index_other);
-      if( !other )
-        return;
-
-      GeoCoord coord_other = parseGeoCoord(other->getStringValue());
-      if(    coord_other.type == GeoCoord::INVALID
-          || coord_other.type == coord.type )
-        return;
-
-      GeoNodes::iterator it_geo_node_other = _geo_nodes.find(other);
-      if( it_geo_node_other == _geo_nodes.end() )
-        LOG_GEO_RET("other geo node not found!")
-      GeoNodePair* geo_node_other = it_geo_node_other->second.get();
-
-      // Let use both nodes use the same GeoNodePair instance
-      if( geo_node_other != geo_node )
-        it_geo_node_other->second = it_geo_node->second;
-
-      if( coord_other.type == GeoCoord::LATITUDE )
-        geo_node->setNodeLat(other);
-      else
-        geo_node->setNodeLon(other);
-
-      // Set name for resulting screen coordinate nodes
-      geo_node->setTargetName( name.substr(0, name.length() - GEO.length()) );
+      // Remove rotation matrix (tf[0]) and return to element always being
+      // oriented upwards (or any orientation inside other matrices).
+      child->getParent()->removeChild("tf", 0);
     }
+    else
+      return Element::childRemoved(parent, child);
   }
 
   //----------------------------------------------------------------------------
-  void Map::childChanged(SGPropertyNode * child)
+  void Map::valueChanged(SGPropertyNode* child)
+  {
+    if( child->getParent() != _node )
+    {
+      const std::string& name = child->getNameString();
+
+      if( boost::ends_with(name, GEO) )
+        return geoNodeChanged(child);
+      else if( name == HDG )
+        return hdgNodeChanged(child);
+    }
+
+    return Group::valueChanged(child);
+  }
+
+  //----------------------------------------------------------------------------
+  void Map::childChanged(SGPropertyNode* child)
   {
     if( child->getParent() != _node )
       return Group::childChanged(child);
@@ -201,8 +165,14 @@ namespace canvas
         || child->getNameString() == "ref-lon" )
       _projection->setWorldPosition( _node->getDoubleValue("ref-lat"),
                                      _node->getDoubleValue("ref-lon") );
-    else if( child->getNameString() == "hdg" )
+    else if( child->getNameString() == HDG )
+    {
       _projection->setOrientation(child->getFloatValue());
+      for( NodeSet::iterator it = _hdg_nodes.begin();
+                             it != _hdg_nodes.end();
+                           ++it )
+        hdgNodeChanged(*it);
+    }
     else if( child->getNameString() == "range" )
       _projection->setRange(child->getDoubleValue());
     else if( child->getNameString() == "screen-range" )
@@ -213,6 +183,74 @@ namespace canvas
     _projection_dirty = true;
   }
 
+  //----------------------------------------------------------------------------
+  void Map::geoNodeChanged(SGPropertyNode* child)
+  {
+    GeoNodes::iterator it_geo_node = _geo_nodes.find(child);
+    if( it_geo_node == _geo_nodes.end() )
+      LOG_GEO_RET("GeoNode not found!")
+    GeoNodePair* geo_node = it_geo_node->second.get();
+
+    geo_node->setDirty();
+
+    if( !(geo_node->getStatus() & GeoNodePair::INCOMPLETE) )
+      return;
+
+    // Detect lat, lon tuples...
+    GeoCoord coord = parseGeoCoord(child->getStringValue());
+    int index_other = -1;
+
+    switch( coord.type )
+    {
+      case GeoCoord::LATITUDE:
+        index_other = child->getIndex() + 1;
+        geo_node->setNodeLat(child);
+        break;
+      case GeoCoord::LONGITUDE:
+        index_other = child->getIndex() - 1;
+        geo_node->setNodeLon(child);
+        break;
+      default:
+        LOG_GEO_RET("Invalid geo coord")
+    }
+
+    const std::string& name = child->getNameString();
+    SGPropertyNode *other = child->getParent()->getChild(name, index_other);
+    if( !other )
+      return;
+
+    GeoCoord coord_other = parseGeoCoord(other->getStringValue());
+    if(    coord_other.type == GeoCoord::INVALID
+        || coord_other.type == coord.type )
+      return;
+
+    GeoNodes::iterator it_geo_node_other = _geo_nodes.find(other);
+    if( it_geo_node_other == _geo_nodes.end() )
+      LOG_GEO_RET("other geo node not found!")
+    GeoNodePair* geo_node_other = it_geo_node_other->second.get();
+
+    // Let use both nodes use the same GeoNodePair instance
+    if( geo_node_other != geo_node )
+      it_geo_node_other->second = it_geo_node->second;
+
+    if( coord_other.type == GeoCoord::LATITUDE )
+      geo_node->setNodeLat(other);
+    else
+      geo_node->setNodeLon(other);
+
+    // Set name for resulting screen coordinate nodes
+    geo_node->setTargetName( name.substr(0, name.length() - GEO.length()) );
+  }
+
+  //----------------------------------------------------------------------------
+  void Map::hdgNodeChanged(SGPropertyNode* child)
+  {
+    child->getParent()->setFloatValue(
+      "tf[0]/rot",
+      SGMiscf::deg2rad(child->getFloatValue() - _projection->orientation())
+    );
+  }
+
   //----------------------------------------------------------------------------
   Map::GeoCoord Map::parseGeoCoord(const std::string& val) const
   {

simgear/canvas/elements/CanvasMap.hxx

@@ -24,6 +24,7 @@
 
 #include <boost/shared_ptr.hpp>
 #include <boost/unordered_map.hpp>
+#include <boost/unordered_set.hpp>
 
 namespace simgear
 {
@@ -41,7 +42,7 @@ namespace canvas
       Map( const CanvasWeakPtr& canvas,
            const SGPropertyNode_ptr& node,
            const Style& parent_style,
-           Element* parent = 0 );
+           ElementWeakPtr parent = 0 );
       virtual ~Map();
 
       virtual void update(double dt);
@@ -59,14 +60,18 @@ namespace canvas
       typedef boost::unordered_map< SGPropertyNode*,
                                     boost::shared_ptr<GeoNodePair>
                                   > GeoNodes;
+      typedef boost::unordered_set<SGPropertyNode*> NodeSet;
+
       GeoNodes _geo_nodes;
+      NodeSet  _hdg_nodes;
       boost::shared_ptr<HorizontalProjection> _projection;
       bool _projection_dirty;
 
       struct GeoCoord
       {
         GeoCoord():
-          type(INVALID)
+          type(INVALID),
+          value(0)
         {}
         enum
         {
@@ -77,6 +82,9 @@ namespace canvas
         double value;
       };
 
+      void geoNodeChanged(SGPropertyNode * child);
+      void hdgNodeChanged(SGPropertyNode * child);
+
       GeoCoord parseGeoCoord(const std::string& val) const;
   };
 

simgear/canvas/elements/CanvasPath.cxx

@@ -531,7 +531,7 @@ namespace canvas
   Path::Path( const CanvasWeakPtr& canvas,
               const SGPropertyNode_ptr& node,
               const Style& parent_style,
-              Element* parent ):
+              ElementWeakPtr parent ):
     Element(canvas, node, parent_style, parent),
     _path( new PathDrawable(this) )
   {

simgear/canvas/elements/CanvasPath.hxx

@@ -36,7 +36,7 @@ namespace canvas
       Path( const CanvasWeakPtr& canvas,
             const SGPropertyNode_ptr& node,
             const Style& parent_style,
-            Element* parent = 0 );
+            ElementWeakPtr parent = 0 );
       virtual ~Path();
 
       virtual void update(double dt);

simgear/canvas/elements/CanvasText.cxx

@@ -159,8 +159,12 @@ namespace canvas
 
     if( empty() )
       return pos;
-
+#if OSG_VERSION_LESS_THAN(3,3,5)
     GlyphQuads::Coords2 const& coords = _quads->_coords;
+#else
+    GlyphQuads::Coords2 refCoords = _quads->_coords;
+    GlyphQuads::Coords2::element_type &coords = *refCoords.get();
+#endif
     size_t global_i = _begin + i;
 
     if( global_i == _begin )
@@ -194,7 +198,12 @@ namespace canvas
       return cursorPos(0);
 
     GlyphQuads::Glyphs const& glyphs = _quads->_glyphs;
+    #if OSG_VERSION_LESS_THAN(3,3,5)
     GlyphQuads::Coords2 const& coords = _quads->_coords;
+#else
+    GlyphQuads::Coords2 refCoords = _quads->_coords;
+    GlyphQuads::Coords2::element_type &coords = *refCoords.get();
+#endif
 
     float const HIT_FRACTION = 0.6;
     float const character_width = _text->getCharacterHeight()
@@ -627,7 +636,13 @@ namespace canvas
 
     const GlyphQuads& quads = _textureGlyphQuadMap.begin()->second;
     const GlyphQuads::Glyphs& glyphs = quads._glyphs;
-    const GlyphQuads::Coords2& coords = quads._coords;
+#if OSG_VERSION_LESS_THAN(3,3,5)
+    GlyphQuads::Coords2 const& coords = quads._coords;
+#else
+    GlyphQuads::Coords2 refCoords = quads._coords;
+    GlyphQuads::Coords2::element_type &coords = *refCoords.get();
+#endif
+
     const GlyphQuads::LineNumbers& line_numbers = quads._lineNumbers;
 
     float wr = _characterHeight / getCharacterAspectRatio();
@@ -725,7 +740,7 @@ namespace canvas
   Text::Text( const CanvasWeakPtr& canvas,
               const SGPropertyNode_ptr& node,
               const Style& parent_style,
-              Element* parent ):
+              ElementWeakPtr parent ):
     Element(canvas, node, parent_style, parent),
     _text( new Text::TextOSG(this) )
   {

simgear/canvas/elements/CanvasText.hxx

@@ -40,7 +40,7 @@ namespace canvas
       Text( const CanvasWeakPtr& canvas,
             const SGPropertyNode_ptr& node,
             const Style& parent_style,
-            Element* parent = 0 );
+            ElementWeakPtr parent = 0 );
       ~Text();
 
       void setText(const char* text);

simgear/canvas/elements/map/projection.hxx

@@ -34,7 +34,10 @@ namespace canvas
     public:
       struct ScreenPosition
       {
-        ScreenPosition() {}
+        ScreenPosition():
+          x(0),
+          y(0)
+        {}
 
         ScreenPosition(double x, double y):
           x(x),
@@ -67,8 +70,11 @@ namespace canvas
     public:
 
       HorizontalProjection():
-        _cos_rot(1),
-        _sin_rot(0),
+        _ref_lat(0),
+        _ref_lon(0),
+        _angle(0),
+        _cos_angle(1),
+        _sin_angle(0),
         _range(5)
       {
         setScreenRange(200);
@@ -88,9 +94,19 @@ namespace canvas
        */
       void setOrientation(float hdg)
       {
+        _angle = hdg;
+
         hdg = SGMiscf::deg2rad(hdg);
-        _sin_rot = sin(hdg);
-        _cos_rot = cos(hdg);
+        _sin_angle = sin(hdg);
+        _cos_angle = cos(hdg);
+      }
+
+      /**
+       * Get orientation/heading of the projection (in degree)
+       */
+      float orientation() const
+      {
+        return _angle;
       }
 
       void setRange(double range)
@@ -114,8 +130,8 @@ namespace canvas
         pos.y *= scale;
         return ScreenPosition
         (
-          _cos_rot * pos.x - _sin_rot * pos.y,
-         -_sin_rot * pos.x - _cos_rot * pos.y
+          _cos_angle * pos.x - _sin_angle * pos.y,
+         -_sin_angle * pos.x - _cos_angle * pos.y
         );
       }
 
@@ -129,10 +145,11 @@ namespace canvas
        */
       virtual ScreenPosition project(double lat, double lon) const = 0;
 
-      double  _ref_lat,
-              _ref_lon,
-              _cos_rot,
-              _sin_rot,
+      double  _ref_lat,   ///<! Reference latitude (radian)
+              _ref_lon,   ///<! Reference latitude (radian)
+              _angle,     ///<! Map rotation angle (degree)
+              _cos_angle,
+              _sin_angle,
               _range;
   };
 

simgear/compiler.h

@@ -190,6 +190,12 @@ inline int (isnan)(double r) { return !(r <= 0 || r >= 0); }
 #  define DEPRECATED
 #endif
 
+#if defined(__clang__)
+#  define SG_NO_RETURN [[noreturn]]
+#else
+#  define SG_NO_RETURN
+#endif
+
 //
 // No user modifiable definitions beyond here.
 //

simgear/constants.h

@@ -211,5 +211,10 @@ const float SG_RADIANS_TO_DEGREES = 180.0f / SG_PI;
 /** for backwards compatibility */
 #define SG_SCENERY_FILE_FORMAT "0.4"
 
+/** Default range in m at which all objects are displayed.  Overridden by /sim/rendering/static-lod/rough **/
+#define SG_OBJECT_RANGE     9000.0
+
+/** Radius of scenery tiles in m **/
+#define SG_TILE_RADIUS      14000.0
 
 #endif // _SG_CONSTANTS_H

simgear/debug/debug_types.h

@@ -32,7 +32,9 @@ typedef enum {
     SG_SOUND       = 0x00200000,
     SG_NAVAID      = 0x00400000,
     SG_GUI         = 0x00800000,
-    SG_UNDEFD      = 0x01000000, // For range checking
+    SG_TERRASYNC   = 0x01000000,
+    SG_PARTICLES   = 0x02000000,
+    SG_UNDEFD      = 0x04000000, // For range checking
 
     SG_ALL         = 0xFFFFFFFF
 } sgDebugClass;

simgear/debug/logstream.cxx

@@ -71,6 +71,8 @@ const char* debugClassToString(sgDebugClass c)
     case SG_SOUND:      return "sound";
     case SG_NAVAID:     return "navaid";
     case SG_GUI:        return "gui";
+    case SG_TERRASYNC:  return "terrasync";
+    case SG_PARTICLES:  return "particles";
     default:            return "unknown";
     }
 }

simgear/environment/metar.cxx

@@ -23,6 +23,16 @@
 /**
  * @file metar.cxx
  * Interface for encoded Meteorological Aerodrome Reports (METAR).
+ *
+ * @see WMO-49
+ * Technical Regulations, Basic Documents No. 2 (WMO No. 49)
+ * Volume II - Meteorological Service for International Air Navigation
+ * http://library.wmo.int/pmb_ged/wmo_49-v2_2013_en.pdf
+ *
+ * Refer to Table A3-2 (Template for METAR and SPECI) following page 78.
+ *
+ * For general information:
+ * World Meteorological Organization http://library.wmo.int
  */
 #ifdef HAVE_CONFIG_H
 #  include <simgear_config.h>
@@ -465,6 +475,7 @@ bool SGMetar::scanRwyVisRange()
 	char *m = _m;
 	int i;
 	SGMetarRunway r;
+
 	if (*m++ != 'R')
 		return false;
 	if (!scanNumber(&m, &i, 2))
@@ -582,6 +593,14 @@ bool SGMetar::scanWeather()
 	string weather;
 	const struct Token *a;
 
+	// @see WMO-49 Section 4.4.2.9
+	// Denotes a temporary failure of the sensor
+	if (!strncmp(m, "// ", 3)) {
+		_m += 3;
+		_grpcount++;
+		return false;
+	}
+
 	if ((a = scanToken(&m, special))) {
 		if (!scanBoundary(&m))
 			return false;
@@ -591,7 +610,7 @@ bool SGMetar::scanWeather()
 	}
 
 	string pre, post;
-    struct Weather w;
+	struct Weather w;
 	if (*m == '-')
 		m++, pre = "light ", w.intensity = LIGHT;
 	else if (*m == '+')
@@ -685,7 +704,7 @@ bool SGMetar::scanSkyCondition()
 			return false;
 
 		if (i == 3) {
-            cl._coverage = SGMetarCloud::COVERAGE_CLEAR;
+			cl._coverage = SGMetarCloud::COVERAGE_CLEAR;
 			_clouds.push_back(cl);
 		} else {
 			_cavok = true;
@@ -716,7 +735,7 @@ bool SGMetar::scanSkyCondition()
 	} else if (!scanNumber(&m, &i, 3))
 		i = -1;
 
-    if (cl._coverage == SGMetarCloud::COVERAGE_NIL) {
+	if (cl._coverage == SGMetarCloud::COVERAGE_NIL) {
 		if (!scanBoundary(&m))
 			return false;
 		if (i == -1)			// 'VV///'
@@ -735,9 +754,15 @@ bool SGMetar::scanSkyCondition()
 		cl._type = a->id;
 		cl._type_long = a->text;
 	}
+
+	// @see WMO-49 Section 4.5.4.5
+	// Denotes temporary failure of sensor and covers cases like FEW045///
+	if (!strncmp(m, "///", 3))
+		m += 3;
 	if (!scanBoundary(&m))
 		return false;
 	_clouds.push_back(cl);
+
 	_m = m;
 	_grpcount++;
 	return true;

simgear/environment/test_metar.cxx

@@ -58,6 +58,37 @@ void test_basic()
     COMPARE(m1.getWindDir(), 270);
     FUZZY_COMPARE(m1.getWindSpeed_kt(), 12, TEST_EPSILON);
     
+    COMPARE(m1.getWeather().size(), 1);
+    COMPARE(m1.getClouds().size(), 2);
+
+    FUZZY_COMPARE(m1.getTemperature_C(), 10, TEST_EPSILON);
+    FUZZY_COMPARE(m1.getDewpoint_C(), 5, TEST_EPSILON);
+    FUZZY_COMPARE(m1.getPressure_hPa(), 1025, TEST_EPSILON);
+}
+
+void test_sensor_failure_weather()
+{
+    SGMetar m1("2011/10/20 11:25 EHAM 201125Z 27012KT 240V300 9999 // FEW025CB SCT048 10/05 Q1025");
+    COMPARE(m1.getWindDir(), 270);
+    FUZZY_COMPARE(m1.getWindSpeed_kt(), 12, TEST_EPSILON);
+
+    COMPARE(m1.getWeather().size(), 0);
+    COMPARE(m1.getClouds().size(), 2);
+
+    FUZZY_COMPARE(m1.getTemperature_C(), 10, TEST_EPSILON);
+    FUZZY_COMPARE(m1.getDewpoint_C(), 5, TEST_EPSILON);
+    FUZZY_COMPARE(m1.getPressure_hPa(), 1025, TEST_EPSILON);
+}
+
+void test_sensor_failure_cloud()
+{
+    SGMetar m1("2011/10/20 11:25 EHAM 201125Z 27012KT 240V300 9999 FEW025CB/// SCT048/// 10/05 Q1025");
+    COMPARE(m1.getWindDir(), 270);
+    FUZZY_COMPARE(m1.getWindSpeed_kt(), 12, TEST_EPSILON);
+
+    COMPARE(m1.getWeather().size(), 0);
+    COMPARE(m1.getClouds().size(), 2);
+
     FUZZY_COMPARE(m1.getTemperature_C(), 10, TEST_EPSILON);
     FUZZY_COMPARE(m1.getDewpoint_C(), 5, TEST_EPSILON);
     FUZZY_COMPARE(m1.getPressure_hPa(), 1025, TEST_EPSILON);
@@ -66,7 +97,9 @@ void test_basic()
 int main(int argc, char* argv[])
 {
     try {
-    test_basic();
+        test_basic();
+        test_sensor_failure_weather();
+        test_sensor_failure_cloud();
     } catch (sg_exception& e) {
         cerr << "got exception:" << e.getMessage() << endl;
         return -1;

simgear/ephemeris/jupiter.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include "jupiter.hxx"
 

simgear/ephemeris/mars.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include "mars.hxx"
 

simgear/ephemeris/mercury.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include "mercury.hxx"
 

simgear/ephemeris/neptune.cxx

@@ -25,7 +25,7 @@
 #ifdef __BORLANDC__
 #  define exception c_exception
 #endif
-#include <math.h>
+#include <cmath>
 
 #include "neptune.hxx"
 

simgear/ephemeris/saturn.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include "saturn.hxx"
 

simgear/ephemeris/star.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include <simgear/debug/logstream.hxx>
 

simgear/ephemeris/stardata.hxx

@@ -41,7 +41,7 @@ public:
     bool load( const SGPath& path );
 
     // stars
-    inline int getNumStars() const { return _stars.size(); }
+    inline int getNumStars() const { return static_cast<int>(_stars.size()); }
     inline SGVec3d *getStars() { return &(_stars[0]); }
 
 private:

simgear/ephemeris/uranus.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include "uranus.hxx"
 

simgear/ephemeris/venus.cxx

@@ -22,7 +22,7 @@
  * $Id$
  **************************************************************************/
 
-#include <math.h>
+#include <cmath>
 
 #include "venus.hxx"
 

simgear/io/AbstractRepository.cxx

@@ -0,0 +1,34 @@
+// AbstractRepository.cxx -- abstract API for TerraSync remote
+//
+// Copyright (C) 2016  James Turner <zakalawe@mac.com>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+#include "AbstractRepository.hxx"
+
+namespace simgear
+{
+
+AbstractRepository::~AbstractRepository()
+{
+
+}
+
+size_t AbstractRepository::bytesStillToDownload() const
+{
+    return 0;
+}
+
+} // of namespace simgear

simgear/io/AbstractRepository.hxx

@@ -0,0 +1,72 @@
+// AbstractRepository.hxx - API for terrasyc to access remote server
+//
+// Copyright (C) 2016  James Turner <zakalawe@mac.com>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+
+#ifndef SG_IO_ABSTRACT_REPOSITORY_HXX
+#define SG_IO_ABSTRACT_REPOSITORY_HXX
+
+#include <string>
+
+#include <simgear/misc/sg_path.hxx>
+
+namespace simgear  {
+
+  namespace HTTP {
+    class Client;
+  }
+
+class AbstractRepository
+{
+public:
+
+    virtual ~AbstractRepository();
+
+    virtual SGPath fsBase() const = 0;
+
+    virtual void setBaseUrl(const std::string& url) =0;
+    virtual std::string baseUrl() const = 0;;
+
+    virtual HTTP::Client* http() const = 0;
+
+    virtual void update() = 0;
+
+    virtual bool isDoingSync() const = 0;
+
+    virtual size_t bytesStillToDownload() const;
+
+    enum ResultCode {
+        REPO_NO_ERROR = 0,
+        REPO_ERROR_NOT_FOUND,
+        REPO_ERROR_SOCKET,
+        SVN_ERROR_XML,
+        SVN_ERROR_TXDELTA,
+        REPO_ERROR_IO,
+        REPO_ERROR_CHECKSUM,
+        REPO_ERROR_FILE_NOT_FOUND,
+        REPO_ERROR_HTTP,
+        REPO_PARTIAL_UPDATE
+    };
+
+    virtual ResultCode failure() const = 0;
+  protected:
+
+};
+
+} // of namespace simgear
+
+#endif // of SG_IO_ABSTRACT_REPOSITORY_HXX

simgear/io/CMakeLists.txt

@@ -18,11 +18,12 @@ set(HEADERS
     HTTPFileRequest.hxx
     HTTPMemoryRequest.hxx
     HTTPRequest.hxx
-    HTTPContentDecode.hxx
+    AbstractRepository.hxx
     DAVMultiStatus.hxx
     SVNRepository.hxx
     SVNDirectory.hxx
     SVNReportParser.hxx
+    HTTPRepository.hxx
     )
 
 set(SOURCES
@@ -41,13 +42,19 @@ set(SOURCES
     HTTPFileRequest.cxx
     HTTPMemoryRequest.cxx
     HTTPRequest.cxx
-    HTTPContentDecode.cxx
+    AbstractRepository.cxx
     DAVMultiStatus.cxx
     SVNRepository.cxx
     SVNDirectory.cxx
     SVNReportParser.cxx
+    HTTPRepository.cxx
     )
 
+if(ENABLE_DNS)
+  list(APPEND SOURCES DNSClient.cxx)
+  list(APPEND HEADERS DNSClient.hxx)
+endif()
+
 simgear_component(io io "${SOURCES}" "${HEADERS}")
 
 if(ENABLE_TESTS)
@@ -63,15 +70,28 @@ target_link_libraries(test_http ${TEST_LIBS})
 
 add_test(http ${EXECUTABLE_OUTPUT_PATH}/test_http)
 
+if(ENABLE_DNS)
+	add_executable(test_dns test_DNS.cxx)
+	target_link_libraries(test_dns ${TEST_LIBS})
+	add_test(dns ${EXECUTABLE_OUTPUT_PATH}/test_dns)
+endif()
+
 add_executable(httpget httpget.cxx)
 target_link_libraries(httpget ${TEST_LIBS})
 
+add_executable(http_repo_sync http_repo_sync.cxx)
+target_link_libraries(http_repo_sync ${TEST_LIBS})
+
 add_executable(decode_binobj decode_binobj.cxx)
 target_link_libraries(decode_binobj ${TEST_LIBS})
 
 add_executable(test_binobj test_binobj.cxx)
-target_link_libraries(test_binobj ${TEST_LIBS}) 
-    
+target_link_libraries(test_binobj ${TEST_LIBS})
+
 add_test(binobj ${EXECUTABLE_OUTPUT_PATH}/test_binobj)
 
+add_executable(test_repository test_repository.cxx)
+target_link_libraries(test_repository ${TEST_LIBS})
+add_test(http_repository ${EXECUTABLE_OUTPUT_PATH}/test_repository)
+
 endif(ENABLE_TESTS)

simgear/io/DAVMultiStatus.cxx

@@ -193,7 +193,7 @@ public:
   {
     if (tagStack.empty()) {
       if (strcmp(name, DAV_MULTISTATUS_TAG)) {
-        SG_LOG(SG_IO, SG_WARN, "root element is not " <<
+        SG_LOG(SG_TERRASYNC, SG_WARN, "root element is not " <<
                DAV_MULTISTATUS_TAG << ", got:" << name);
       } else {
         
@@ -202,7 +202,7 @@ public:
       // not at the root element
       if (tagStack.back() == DAV_MULTISTATUS_TAG) {
         if (strcmp(name, DAV_RESPONSE_TAG)) {
-          SG_LOG(SG_IO, SG_WARN, "multistatus child is not response: saw:"
+          SG_LOG(SG_TERRASYNC, SG_WARN, "multistatus child is not response: saw:"
                  << name);
         }
       }
@@ -362,7 +362,7 @@ void DAVMultiStatus::parseXML(const char* data, int size)
   }
   
   if (!XML_Parse(_d->xmlParser, data, size, false)) {
-    SG_LOG(SG_IO, SG_WARN, "DAV parse error:" << XML_ErrorString(XML_GetErrorCode(_d->xmlParser))
+    SG_LOG(SG_TERRASYNC, SG_WARN, "DAV parse error:" << XML_ErrorString(XML_GetErrorCode(_d->xmlParser))
            << " at line:" << XML_GetCurrentLineNumber(_d->xmlParser)
            << " column " << XML_GetCurrentColumnNumber(_d->xmlParser));
     
@@ -376,7 +376,7 @@ void DAVMultiStatus::finishParse()
 {
   if (_d->parserInited) {
     if (!XML_Parse(_d->xmlParser, NULL, 0, true)) {
-        SG_LOG(SG_IO, SG_WARN, "DAV parse error:" << XML_ErrorString(XML_GetErrorCode(_d->xmlParser))
+        SG_LOG(SG_TERRASYNC, SG_WARN, "DAV parse error:" << XML_ErrorString(XML_GetErrorCode(_d->xmlParser))
                << " at line:" << XML_GetCurrentLineNumber(_d->xmlParser)
                << " column " << XML_GetCurrentColumnNumber(_d->xmlParser));
         _d->valid = false;

simgear/io/DNSClient.cxx

@@ -0,0 +1,144 @@
+/**
+ * \file DNSClient.cxx - simple DNS resolver client engine for SimGear
+ */
+
+// Written by James Turner
+//
+// Copyright (C) 2016 Torsten Dreyer - torsten (at) t3r (dot) de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "DNSClient.hxx"
+#include "udns.h"
+#include <time.h>
+#include <simgear/debug/logstream.hxx>
+
+namespace simgear {
+
+namespace DNS {
+
+class Client::ClientPrivate {
+public:
+    ClientPrivate() {
+        if (dns_init(NULL, 0) < 0)
+            SG_LOG(SG_IO, SG_ALERT, "Can't init udns library" );
+
+        if( dns_open(NULL) < 0 )
+            SG_LOG(SG_IO, SG_ALERT, "Can't open udns context" );
+    }
+
+    ~ClientPrivate() {
+        dns_close(NULL);
+    }
+};
+
+Request::Request( const std::string & dn ) :
+        _dn(dn),
+        _type(DNS_T_ANY),
+        _complete(false),
+        _timeout_secs(5),
+        _start(0)
+{
+}
+
+Request::~Request()
+{
+}
+
+bool Request::isTimeout() const
+{
+    return (time(NULL) - _start) > _timeout_secs;
+}
+
+NAPTRRequest::NAPTRRequest( const std::string & dn ) :
+        Request(dn)
+{
+    _type = DNS_T_NAPTR;
+}
+
+static bool sortNAPTR( const NAPTRRequest::NAPTR_ptr a, const NAPTRRequest::NAPTR_ptr b )
+{
+    if( a->order > b->order ) return false;
+    if( a->order < b->order ) return true;
+    return a->preference < b->preference;
+}
+
+static void dnscbNAPTR(struct dns_ctx *ctx, struct dns_rr_naptr *result, void *data)
+{
+    NAPTRRequest * r = static_cast<NAPTRRequest*>(data);
+    if (result) {
+        r->cname = result->dnsnaptr_cname;
+        r->qname = result->dnsnaptr_qname;
+        r->ttl = result->dnsnaptr_ttl;
+        for (int i = 0; i < result->dnsnaptr_nrr; i++) {
+            if( !r->qservice.empty() && r->qservice != result->dnsnaptr_naptr[i].service )
+                return;
+
+            //TODO: case ignore and result flags may have more than one flag
+            if( !r->qflags.empty() && r->qflags != result->dnsnaptr_naptr[i].flags )
+                return;
+
+            NAPTRRequest::NAPTR_ptr naptr(new NAPTRRequest::NAPTR);
+            r->entries.push_back(naptr);
+            naptr->order = result->dnsnaptr_naptr[i].order;
+            naptr->preference = result->dnsnaptr_naptr[i].preference;
+            naptr->flags = result->dnsnaptr_naptr[i].flags;
+            naptr->service = result->dnsnaptr_naptr[i].service;
+            naptr->regexp = result->dnsnaptr_naptr[i].regexp;
+            naptr->replacement = result->dnsnaptr_naptr[i].replacement;
+        }
+        std::sort( r->entries.begin(), r->entries.end(), sortNAPTR );
+        free(result);
+    }
+    r->setComplete();
+}
+
+void NAPTRRequest::submit()
+{
+    if (!dns_submit_naptr(NULL, getDn().c_str(), 0, dnscbNAPTR, this )) {
+        SG_LOG(SG_IO, SG_ALERT, "Can't submit dns request for " << getDn());
+        return;
+    }
+    _start = time(NULL);
+}
+
+
+Client::~Client()
+{
+}
+
+Client::Client() :
+    d(new ClientPrivate)
+{
+}
+
+void Client::makeRequest(const Request_ptr& r)
+{
+    r->submit();
+}
+
+
+void Client::update(int waitTimeout)
+{
+    time_t now = time(NULL);
+    if( dns_timeouts( NULL, waitTimeout, now ) < 0 )
+        return;
+    dns_ioevent(NULL, now);
+}
+
+} // of namespace DNS
+
+} // of namespace simgear

simgear/io/DNSClient.hxx

@@ -0,0 +1,109 @@
+/**
+ * \file DNSClient.hxx - simple DNS resolver client for SimGear
+ */
+
+// Written by Torsten Dreyer
+//
+// Copyright (C) 2016 Torsten Dreyer - torsten (at) t3r (dot) de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef SG_DNS_CLIENT_HXX
+#define SG_DNS_CLIENT_HXX
+
+#include <memory> // for std::auto_ptr
+#include <string>
+#include <vector>
+#include <simgear/structure/SGReferenced.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+
+namespace simgear
+{
+
+namespace DNS
+{
+
+class Request : public SGReferenced
+{
+public:
+    Request( const std::string & dn );
+    virtual ~Request();
+    std::string getDn() const { return _dn; }
+    int getType() const { return _type; }
+    bool isComplete() const { return _complete; }
+    bool isTimeout() const;
+    void setComplete( bool b = true ) { _complete = b; }
+
+    virtual void submit() = 0;
+
+    std::string cname;
+    std::string qname;
+    unsigned ttl;
+protected:
+    std::string _dn;
+    int _type;
+    bool _complete;
+    time_t _timeout_secs;
+    time_t _start;
+};
+
+class NAPTRRequest : public Request
+{
+public:
+    NAPTRRequest( const std::string & dn );
+    virtual void submit();
+
+    struct NAPTR : SGReferenced {
+        int order;
+        int preference;
+        std::string flags;
+        std::string service;
+        std::string regexp;
+        std::string replacement;
+    };
+    typedef SGSharedPtr<NAPTR> NAPTR_ptr;
+    typedef std::vector<NAPTR_ptr> NAPTR_list;
+    NAPTR_list entries;
+
+    std::string qflags;
+    std::string qservice;
+};
+
+typedef SGSharedPtr<Request> Request_ptr;
+
+class Client
+{
+public:
+    Client();
+    ~Client();
+
+    void update(int waitTimeout = 0);
+
+    void makeRequest(const Request_ptr& r);
+
+//    void cancelRequest(const Request_ptr& r, std::string reason = std::string());
+
+private:
+
+    class ClientPrivate;
+    std::auto_ptr<ClientPrivate> d;
+};
+
+} // of namespace DNS
+
+} // of namespace simgear
+
+#endif // of SG_DNS_CLIENT_HXX

simgear/io/HTTPClient.hxx

@@ -38,17 +38,19 @@ namespace HTTP
 
 // forward decls
 class Connection;
-    
+
 class Client
 {
 public:
     Client();
     ~Client();
-    
+
     void update(int waitTimeout = 0);
-    
+
     void makeRequest(const Request_ptr& r);
 
+    void cancelRequest(const Request_ptr& r, std::string reason = std::string());
+
     /**
      * Download a resource and save it to a file.
      *
@@ -68,44 +70,60 @@ public:
 
     void setUserAgent(const std::string& ua);
     void setProxy(const std::string& proxy, int port, const std::string& auth = "");
-    
+
     /**
      * Specify the maximum permitted simultaneous connections
      * (default value is 1)
      */
     void setMaxConnections(unsigned int maxCons);
-    
+
+    void setMaxHostConnections(unsigned int maxHostConns);
+
+    /**
+     * maximum depth to pipeline requests - set to 0 to disable pipelining
+     */
+    void setMaxPipelineDepth(unsigned int depth);
+
     const std::string& userAgent() const;
-        
+
     const std::string& proxyHost() const;
-        
+
     const std::string& proxyAuth() const;
-    
+
     /**
      * predicate, check if at least one connection is active, with at
      * least one request active or queued.
      */
     bool hasActiveRequests() const;
-    
+
     /**
      * crude tracking of bytes-per-second transferred over the socket.
      * suitable for user feedback and rough profiling, nothing more.
      */
     unsigned int transferRateBytesPerSec() const;
-    
+
     /**
      * total bytes downloaded by this HTTP client, for bandwidth usage
      * monitoring
      */
     uint64_t totalBytesDownloaded() const;
+
+    void debugDumpRequests();
+
+    void clearAllConnections();
 private:
+    // libCurl callbacks
+    static size_t requestWriteCallback(char *ptr, size_t size, size_t nmemb, void *userdata);
+    static size_t requestReadCallback(char *ptr, size_t size, size_t nmemb, void *userdata);
+    static size_t requestHeaderCallback(char *buffer, size_t size, size_t nitems, void *userdata);
+
     void requestFinished(Connection* con);
-    
+
     void receivedBytes(unsigned int count);
-    
+
     friend class Connection;
     friend class Request;
-    
+
     class ClientPrivate;
     std::auto_ptr<ClientPrivate> d;
 };

simgear/io/HTTPContentDecode.cxx

@@ -1,269 +0,0 @@
-// Written by James Turner
-//
-// Copyright (C) 2013  James Turner  <zakalawe@mac.com>
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Library General Public
-// License as published by the Free Software Foundation; either
-// version 2 of the License, or (at your option) any later version.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-// Library General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-//
-
-#include "HTTPContentDecode.hxx"
-
-#include <cassert>
-#include <cstdlib> // rand()
-#include <cstring> // for memset, memcpy
-
-#include <simgear/debug/logstream.hxx>
-#include <simgear/structure/exception.hxx>
-#include <simgear/io/lowlevel.hxx> // for sgEndian stuff
-
-namespace simgear
-{
-
-namespace HTTP
-{
-
-    const int ZLIB_DECOMPRESS_BUFFER_SIZE = 32 * 1024;
-    const int ZLIB_INFLATE_WINDOW_BITS = -MAX_WBITS;
-  
-    // see http://www.ietf.org/rfc/rfc1952.txt for these values and
-    // detailed description of the logic 
-    const int GZIP_HEADER_ID1 = 31;
-    const int GZIP_HEADER_ID2 = 139;
-    const int GZIP_HEADER_METHOD_DEFLATE = 8;
-    const unsigned int GZIP_HEADER_SIZE = 10;
-    const int GZIP_HEADER_FEXTRA = 1 << 2;
-    const int GZIP_HEADER_FNAME = 1 << 3;
-    const int GZIP_HEADER_COMMENT = 1 << 4;
-    const int GZIP_HEADER_CRC = 1 << 1;
-    
-ContentDecoder::ContentDecoder() :
-    _output(NULL),
-    _zlib(NULL),
-    _input(NULL),
-    _inputAllocated(0),
-    _inputSize(0)
-{
-}
-
-ContentDecoder::~ContentDecoder()
-{
-    free(_output);
-    free(_input);
-    free(_zlib);
-}
-
-void ContentDecoder::setEncoding(const std::string& encoding)
-{
-    if (encoding == "gzip") {
-      _contentDeflate = true;
-      _needGZipHeader = true;
-    } else if (encoding == "deflate") {
-      _contentDeflate = true;
-      _needGZipHeader = false;
-    } else if (encoding != "identity") {
-      SG_LOG(SG_IO, SG_WARN, "unsupported content encoding:" << encoding);
-    }
-}
-
-void ContentDecoder::reset()
-{
-    _request = NULL;
-    _contentDeflate = false;
-    _needGZipHeader = false;
-    _inputSize = 0;
-}
-
-void ContentDecoder::initWithRequest(Request_ptr req)
-{
-    _request = req;
-    if (!_contentDeflate) {
-        return;
-    }
-
-    if (!_zlib) {
-        _zlib = (z_stream*) malloc(sizeof(z_stream));
-    }
-    
-    memset(_zlib, 0, sizeof(z_stream));
-    if (!_output) {
-         _output = (unsigned char*) malloc(ZLIB_DECOMPRESS_BUFFER_SIZE);
-    }
-    
-    _inputSize = 0;
-    // NULLs means we'll get default alloc+free methods
-    // which is absolutely fine
-    _zlib->avail_out = ZLIB_DECOMPRESS_BUFFER_SIZE;
-    _zlib->next_out = _output;
-    if (inflateInit2(_zlib, ZLIB_INFLATE_WINDOW_BITS) != Z_OK) {
-      SG_LOG(SG_IO, SG_WARN, "inflateInit2 failed");
-    }
-}
-
-void ContentDecoder::finish()
-{    
-    if (_contentDeflate) {
-        runDecoder();
-      inflateEnd(_zlib);
-    }
-}
-
-void ContentDecoder::receivedBytes(const char* n, size_t s)
-{
-    if (!_contentDeflate) {
-        _request->processBodyBytes(n, s);
-        return;
-    }    
-    
-// allocate more space if needed (this will only happen rarely once the
-// buffer has hit something proportionate to the server's compression
-// window size)
-    size_t requiredSize = _inputSize + s;
-    if (requiredSize > _inputAllocated) {
-        reallocateInputBuffer(requiredSize);
-    }
-    
-// copy newly recieved bytes into the buffer
-    memcpy(_input + _inputSize, n, s);
-    _inputSize += s;
-    
-    if (_needGZipHeader && !consumeGZipHeader()) {
-        // still waiting on the full GZIP header, so done
-        return;
-    }
-    
-    runDecoder();
-}
-
-void ContentDecoder::consumeBytes(size_t consumed)
-{    
-    assert(_inputSize >= consumed);
-// move existing (consumed) bytes down
-    if (consumed > 0) {
-        size_t newSize = _inputSize - consumed;
-        memmove(_input, _input + consumed, newSize);
-        _inputSize = newSize;
-    }
-}
-
-void ContentDecoder::reallocateInputBuffer(size_t newSize)
-{    
-    _input = (unsigned char*) realloc(_input, newSize);
-    _inputAllocated = newSize;
-}
-
-void ContentDecoder::runDecoder()
-{
-    _zlib->next_in = (unsigned char*) _input;
-    _zlib->avail_in = _inputSize;
-    int writtenSize;
-    
-    // loop, running zlib() inflate and sending output bytes to
-    // our request body handler. Keep calling inflate until no bytes are
-    // written, and ZLIB has consumed all available input
-    do {
-        _zlib->next_out = _output;
-        _zlib->avail_out = ZLIB_DECOMPRESS_BUFFER_SIZE;
-      int result = inflate(_zlib, Z_NO_FLUSH);
-      if (result == Z_OK || result == Z_STREAM_END) {
-          // nothing to do
-      } else if (result == Z_BUF_ERROR) {
-          // transient error, fall through
-      } else {
-        //  _error = result;          
-        return;
-      }
-          
-      writtenSize = ZLIB_DECOMPRESS_BUFFER_SIZE - _zlib->avail_out;      
-      if (writtenSize > 0) {
-          _request->processBodyBytes((char*) _output, writtenSize);
-      }
-      
-      if (result == Z_STREAM_END) {
-          break;
-      }
-    } while ((_zlib->avail_in > 0) || (writtenSize > 0));
-    
-    // update input buffers based on what we consumed
-    consumeBytes(_inputSize - _zlib->avail_in);
-}
-
-bool ContentDecoder::consumeGZipHeader()
-{    
-    size_t avail = _inputSize;
-    if (avail < GZIP_HEADER_SIZE) {
-      return false; // need more header bytes
-    }
-    
-    if ((_input[0] != GZIP_HEADER_ID1) ||
-        (_input[1] != GZIP_HEADER_ID2) ||
-        (_input[2] != GZIP_HEADER_METHOD_DEFLATE))
-    {
-      return false; // invalid GZip header
-    }
-    
-    char flags = _input[3];
-    unsigned int gzipHeaderSize =  GZIP_HEADER_SIZE;
-    if (flags & GZIP_HEADER_FEXTRA) {
-      gzipHeaderSize += 2;
-      if (avail < gzipHeaderSize) {
-        return false; // need more header bytes
-      }
-      
-      unsigned short extraHeaderBytes = *(reinterpret_cast<unsigned short*>(_input + GZIP_HEADER_FEXTRA));
-      if ( sgIsBigEndian() ) {
-          sgEndianSwap( &extraHeaderBytes );
-      }
-      
-      gzipHeaderSize += extraHeaderBytes;
-      if (avail < gzipHeaderSize) {
-        return false; // need more header bytes
-      }
-    }
-
-#if 0
-    if (flags & GZIP_HEADER_FNAME) {
-      gzipHeaderSize++;
-      while (gzipHeaderSize <= avail) {
-        if (_input[gzipHeaderSize-1] == 0) {
-          break; // found terminating NULL character
-        }
-      }
-    }
-    
-    if (flags & GZIP_HEADER_COMMENT) {
-      gzipHeaderSize++;
-      while (gzipHeaderSize <= avail) {
-        if (_input[gzipHeaderSize-1] == 0) {
-          break; // found terminating NULL character
-        }
-      }
-    }
-#endif
-        
-    if (flags & GZIP_HEADER_CRC) {
-      gzipHeaderSize += 2;
-    }
-    
-    if (avail < gzipHeaderSize) {
-      return false; // need more header bytes
-    }
-    
-    consumeBytes(gzipHeaderSize);
-    _needGZipHeader = false;
-    return true;
-}
-
-} // of namespace HTTP
-
-} // of namespace simgear

simgear/io/HTTPContentDecode.hxx

@@ -1,72 +0,0 @@
-// Written by James Turner
-//
-// Copyright (C) 2013  James Turner  <zakalawe@mac.com>
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Library General Public
-// License as published by the Free Software Foundation; either
-// version 2 of the License, or (at your option) any later version.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-// Library General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
-//
-
-#ifndef SG_HTTP_CONTENT_DECODER_HXX
-#define SG_HTTP_CONTENT_DECODER_HXX
-
-#include <string>
-
-#include <zlib.h>
-
-#include <simgear/io/HTTPRequest.hxx>
-
-
-namespace simgear
-{
-
-namespace HTTP
-{
-
-class ContentDecoder
-{
-public:
-    ContentDecoder();
-    ~ContentDecoder();
-    
-    void reset();
-    
-    void initWithRequest(Request_ptr req);
-    
-    void finish();
-    
-    void setEncoding(const std::string& encoding);
-    
-    void receivedBytes(const char* n, size_t s);
-
-private:
-    bool consumeGZipHeader();
-    void runDecoder();
-    
-    void consumeBytes(size_t consumed);
-    void reallocateInputBuffer(size_t newSize);
-    
-    Request_ptr _request;
-    unsigned char* _output;
-    
-    z_stream* _zlib;
-    unsigned char* _input;
-    size_t _inputAllocated, _inputSize;
-    bool _contentDeflate, _needGZipHeader;
-};
-
-} // of namespace HTTP
-
-} // of namespace simgear
-
-#endif // of SG_HTTP_CONTENT_DECODER_HXX

simgear/io/HTTPFileRequest.cxx

@@ -59,8 +59,6 @@ namespace HTTP
         SG_WARN,
         "HTTP::FileRequest: failed to open file '" << _filename << "'"
       );
-
-      abort("Failed to open file.");
     }
   }
 

simgear/io/HTTPRepository.hxx

@@ -0,0 +1,61 @@
+// HTTPRepository.hxx - plain HTTP TerraSync remote server client
+//
+// Copyright (C) 2016  James Turner <zakalawe@mac.com>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+
+#ifndef SG_IO_HTTP_REPOSITORY_HXX
+#define SG_IO_HTTP_REPOSITORY_HXX
+
+#include <simgear/io/AbstractRepository.hxx>
+#include <memory>
+
+namespace simgear  {
+
+class HTTPRepoPrivate;
+
+class HTTPRepository : public AbstractRepository
+{
+public:
+
+    HTTPRepository(const SGPath& root, HTTP::Client* cl);
+    virtual ~HTTPRepository();
+
+    virtual SGPath fsBase() const;
+
+    virtual void setBaseUrl(const std::string& url);
+    virtual std::string baseUrl() const;
+
+    virtual HTTP::Client* http() const;
+
+    virtual void update();
+
+    virtual bool isDoingSync() const;
+
+    virtual ResultCode failure() const;
+
+    virtual size_t bytesToDownload() const;
+
+    virtual size_t bytesDownloaded() const;
+private:
+    bool isBare() const;
+
+    std::auto_ptr<HTTPRepoPrivate> _d;
+};
+
+} // of namespace simgear
+
+#endif // of HTTPRepository

simgear/io/HTTPRequest.cxx

@@ -32,6 +32,7 @@ extern const int DEFAULT_HTTP_PORT;
 
 //------------------------------------------------------------------------------
 Request::Request(const std::string& url, const std::string method):
+  _client(0),
   _method(method),
   _url(url),
   _responseVersion(HTTP_VERSION_UNKNOWN),
@@ -39,7 +40,8 @@ Request::Request(const std::string& url, const std::string method):
   _responseLength(0),
   _receivedBodyBytes(0),
   _ready_state(UNSENT),
-  _willClose(false)
+  _willClose(false),
+  _connectionCloseHeader(false)
 {
 
 }
@@ -133,19 +135,28 @@ void Request::responseStart(const std::string& r)
     const int maxSplit = 2; // HTTP/1.1 nnn reason-string
     string_list parts = strutils::split(r, NULL, maxSplit);
     if (parts.size() != 3) {
-        throw sg_io_exception("bad HTTP response");
+        throw sg_io_exception("bad HTTP response:" + r);
     }
-    
+
     _responseVersion = decodeHTTPVersion(parts[0]);
     _responseStatus = strutils::to_int(parts[1]);
     _responseReason = parts[2];
+
+    setReadyState(STATUS_RECEIVED);
 }
 
 //------------------------------------------------------------------------------
 void Request::responseHeader(const std::string& key, const std::string& value)
 {
-  if( key == "connection" )
-    _willClose = (value.find("close") != std::string::npos);
+  if( key == "connection" ) {
+    _connectionCloseHeader = (value.find("close") != std::string::npos);
+      // track willClose seperately because other conditions (abort, for
+      // example) can also set it
+    _willClose = _connectionCloseHeader;
+  } else if (key == "content-length") {
+    int sz = strutils::to_int(value);
+    setResponseLength(sz);
+  }
 
   _responseHeaders[key] = value;
 }
@@ -207,7 +218,7 @@ std::string Request::scheme() const
     if (firstColon > 0) {
         return url().substr(0, firstColon);
     }
-    
+
     return ""; // couldn't parse scheme
 }
 
@@ -219,20 +230,20 @@ std::string Request::path() const
     if (schemeEnd < 0) {
         return ""; // couldn't parse scheme
     }
-    
+
     int hostEnd = u.find('/', schemeEnd + 3);
     if (hostEnd < 0) {
-// couldn't parse host, or URL looks like 'http://foo.com' (no trailing '/') 
-// fixup to root resource path: '/' 
-        return "/"; 
+// couldn't parse host, or URL looks like 'http://foo.com' (no trailing '/')
+// fixup to root resource path: '/'
+        return "/";
     }
-    
+
     int query = u.find('?', hostEnd + 1);
     if (query < 0) {
         // all remainder of URL is path
         return u.substr(hostEnd);
     }
-    
+
     return u.substr(hostEnd, query - hostEnd);
 }
 
@@ -244,7 +255,7 @@ std::string Request::query() const
   if (query < 0) {
     return "";  //no query string found
   }
-  
+
   return u.substr(query);   //includes question mark
 }
 
@@ -319,6 +330,7 @@ unsigned int Request::responseLength() const
 //------------------------------------------------------------------------------
 void Request::setFailure(int code, const std::string& reason)
 {
+    SG_LOG(SG_IO, SG_WARN, "HTTP request: set failure:" << code << " reason " << reason);
   _responseStatus = code;
   _responseReason = reason;
 
@@ -353,19 +365,6 @@ void Request::setReadyState(ReadyState state)
   _cb_always(this);
 }
 
-//------------------------------------------------------------------------------
-void Request::abort()
-{
-  abort("Request aborted.");
-}
-
-//----------------------------------------------------------------------------
-void Request::abort(const std::string& reason)
-{
-  setFailure(-1, reason);
-  _willClose = true;
-}
-
 //------------------------------------------------------------------------------
 bool Request::closeAfterComplete() const
 {
@@ -373,6 +372,19 @@ bool Request::closeAfterComplete() const
   return _willClose || (_responseVersion != HTTP_1_1);
 }
 
+//------------------------------------------------------------------------------
+
+void Request::setCloseAfterComplete()
+{
+    _willClose = true;
+}
+
+//------------------------------------------------------------------------------
+bool Request::serverSupportsPipelining() const
+{
+    return (_responseVersion == HTTP_1_1) && !_connectionCloseHeader;
+}
+
 //------------------------------------------------------------------------------
 bool Request::isComplete() const
 {

simgear/io/HTTPRequest.hxx

@@ -37,6 +37,8 @@ namespace simgear
 namespace HTTP
 {
 
+class Client;
+
 /**
  * Base class for HTTP request (and answer).
  */
@@ -50,6 +52,7 @@ public:
     {
       UNSENT = 0,
       OPENED,
+      STATUS_RECEIVED,
       HEADERS_RECEIVED,
       LOADING,
       DONE,
@@ -124,19 +127,22 @@ public:
     void setBodyData( const SGPropertyNode* data );
 
     virtual void setUrl(const std::string& url);
-    
+
     virtual std::string method() const
         { return _method; }
     virtual std::string url() const
         { return _url; }
-    
+
+    Client* http() const
+    { return _client; }
+
     virtual std::string scheme() const;
     virtual std::string path() const;
     virtual std::string host() const;
     virtual std::string hostAndPort() const;
     virtual unsigned short port() const;
     virtual std::string query() const;
-    
+
     StringMap const& responseHeaders() const
         { return _responseHeaders; }
 
@@ -144,13 +150,13 @@ public:
 
     virtual int responseCode() const
         { return _responseStatus; }
-        
+
     virtual std::string responseReason() const
         { return _responseReason; }
-        
+
     void setResponseLength(unsigned int l);
     virtual unsigned int responseLength() const;
-  
+
     /**
      * Check if request contains body data.
      */
@@ -165,47 +171,44 @@ public:
      * Retrieve the size of the request body.
      */
     virtual size_t bodyLength() const;
-    
+
     /**
      * Retrieve the body data bytes. Will be passed the maximum body bytes
      * to return in the buffer, and must return the actual number
-     * of bytes written. 
+     * of bytes written.
      */
     virtual size_t getBodyData(char* s, size_t offset, size_t max_count) const;
-  
+
     /**
      * running total of body bytes received so far. Can be used
      * to generate a completion percentage, if the response length is
-     * known. 
+     * known.
      */
     unsigned int responseBytesReceived() const
         { return _receivedBodyBytes; }
-        
+
     enum HTTPVersion {
         HTTP_VERSION_UNKNOWN = 0,
         HTTP_0_x, // 0.9 or similar
         HTTP_1_0,
         HTTP_1_1
     };
-    
+
     HTTPVersion responseVersion() const
         { return _responseVersion; }
-    
+
     ReadyState readyState() const { return _ready_state; }
 
-    /**
-     * Request aborting this request.
-     */
-    void abort();
-
-    /**
-     * Request aborting this request and specify the reported reaseon for it.
-     */
-    void abort(const std::string& reason);
-
     bool closeAfterComplete() const;
     bool isComplete() const;
 
+    /**
+     * Check if the server response indicates pipelining should be continued.
+     * Currently tests that HTTP_1_1 is explicitly supported, and that the
+     * server/proxy did not request Connection: close
+     */
+    bool serverSupportsPipelining() const;
+
 protected:
     Request(const std::string& url, const std::string method = "GET");
 
@@ -226,13 +229,17 @@ private:
     friend class Client;
     friend class Connection;
     friend class ContentDecoder;
-    
+
     Request(const Request&); // = delete;
     Request& operator=(const Request&); // = delete;
 
     void processBodyBytes(const char* s, int n);
     void setReadyState(ReadyState state);
 
+    void setCloseAfterComplete();
+
+    Client*       _client; // HTTP client we're active on
+
     std::string   _method;
     std::string   _url;
     StringMap     _request_headers;
@@ -252,6 +259,7 @@ private:
 
     ReadyState    _ready_state;
     bool          _willClose;
+    bool          _connectionCloseHeader;
 };
 
 typedef SGSharedPtr<Request> Request_ptr;

simgear/io/SVNDirectory.cxx

@@ -96,14 +96,14 @@ void SVNDirectory::parseCache()
   LineState lineState = LINESTATE_HREF;
   std::ifstream file(p.c_str());
     if (!file.is_open()) {
-        SG_LOG(SG_IO, SG_WARN, "unable to open cache file for reading:" << p);
+        SG_LOG(SG_TERRASYNC, SG_WARN, "unable to open cache file for reading:" << p);
         return;
     }
   bool doneSelf = false;
     
   file.getline(href, 1024);
   if (strcmp(CACHE_VERSION_4_TOKEN, href)) {
-    SG_LOG(SG_IO, SG_WARN, "invalid cache file [missing header token]:" << p << " '" << href << "'");
+    SG_LOG(SG_TERRASYNC, SG_WARN, "invalid cache file [missing header token]:" << p << " '" << href << "'");
     return;
   }
     
@@ -136,7 +136,7 @@ void SVNDirectory::parseCache()
         _cachedRevision = versionName;
         doneSelf = true;
       } else {
-        DAVResource* child = addChildDirectory(hrefPtr)->collection();
+        DAVResource* child = parseChildDirectory(hrefPtr)->collection();
           string s = strutils::strip(versionName);
           if (!s.empty()) {
               child->setVersionName(versionName);
@@ -183,7 +183,7 @@ void SVNDirectory::writeCache()
 void SVNDirectory::setBaseUrl(const string& url)
 {
     if (_parent) {
-        SG_LOG(SG_IO, SG_ALERT, "setting base URL on non-root directory " << url);
+        SG_LOG(SG_TERRASYNC, SG_ALERT, "setting base URL on non-root directory " << url);
         return;
     }
     
@@ -235,11 +235,21 @@ SVNDirectory::addChildDirectory(const std::string& dirName)
     return child;
 }
 
+SVNDirectory*
+SVNDirectory::parseChildDirectory(const std::string& dirName)
+{
+    assert(!dav->childWithName(dirName));
+    DAVCollection* childCol = dav->createChildCollection(dirName);
+    SVNDirectory* child = new SVNDirectory(this, childCol);
+    childCol->setVersionName(child->cachedRevision());
+    _children.push_back(child);
+    return child;
+}
+
 void SVNDirectory::deleteChildByName(const std::string& nm)
 {
     DAVResource* child = dav->childWithName(nm);
     if (!child) {
-//        std::cerr << "ZZZ: deleteChildByName: unknown:" << nm << std::endl;
         return;
     }
 
@@ -247,17 +257,24 @@ void SVNDirectory::deleteChildByName(const std::string& nm)
     
     if (child->isCollection()) {
         Dir d(path);
-        d.remove(true);
-    
+        bool ok = d.remove(true);
+        if (!ok) {
+            SG_LOG(SG_TERRASYNC, SG_ALERT, "SVNDirectory::deleteChildByName: failed to remove dir:"
+                   << nm << " at path:\n\t" << path);
+        }
+
         DirectoryList::iterator it = findChildDir(nm);
         if (it != _children.end()) {
             SVNDirectory* c = *it;
-    //        std::cout << "YYY: deleting SVNDirectory for:" << nm << std::endl;
             delete c;
             _children.erase(it);
         }
     } else {
-        path.remove();
+        bool ok = path.remove();
+        if (!ok) {
+            SG_LOG(SG_TERRASYNC, SG_ALERT, "SVNDirectory::deleteChildByName: failed to remove path:" << nm
+                   << " at path:\n\t" << path);
+        }
     }
 
     dav->removeChild(child);

simgear/io/SVNDirectory.hxx

@@ -91,7 +91,8 @@ private:
   void writeCache();
   
   DirectoryList::iterator findChildDir(const std::string& dirName);
-      
+  SVNDirectory* parseChildDirectory(const std::string& dirName);
+
   SGPath localPath;
   DAVCollection* dav;
   SVNRepository* repo;

simgear/io/SVNReportParser.cxx

@@ -244,7 +244,7 @@ class SVNReportParser::SVNReportParserPrivate
 public:
   SVNReportParserPrivate(SVNRepository* repo) :
     tree(repo),
-    status(SVNRepository::SVN_NO_ERROR),
+    status(AbstractRepository::REPO_NO_ERROR),
     parserInited(false),
     currentPath(repo->fsBase())
   {
@@ -258,7 +258,7 @@ public:
   
   void startElement (const char * name, const char** attributes)
   {    
-      if (status != SVNRepository::SVN_NO_ERROR) {
+      if (status != AbstractRepository::REPO_NO_ERROR) {
           return;
       }
       
@@ -277,7 +277,7 @@ public:
       currentPath = filePath;
        
       if (!filePath.exists()) {
-          fail(SVNRepository::SVN_ERROR_FILE_NOT_FOUND);
+          fail(AbstractRepository::REPO_ERROR_FILE_NOT_FOUND);
           return;
       }
 
@@ -386,7 +386,7 @@ public:
   
   void endElement (const char * name)
   {
-      if (status != SVNRepository::SVN_NO_ERROR) {
+      if (status != SVNRepository::REPO_NO_ERROR) {
           return;
       }
       
@@ -420,7 +420,7 @@ public:
     } else if (!strcmp(name, SVN_DAV_MD5_CHECKSUM)) {
       // validate against (presumably) just written file
       if (decodedFileMd5 != md5Sum) {
-        fail(SVNRepository::SVN_ERROR_CHECKSUM);
+        fail(SVNRepository::REPO_ERROR_CHECKSUM);
       }
     } else if (!strcmp(name, SVN_OPEN_DIRECTORY_TAG)) {
         currentDir->updateReportComplete();
@@ -443,7 +443,7 @@ public:
   
   void data (const char * s, int length)
   {
-      if (status != SVNRepository::SVN_NO_ERROR) {
+      if (status != SVNRepository::REPO_NO_ERROR) {
           return;
       }
       
@@ -544,7 +544,7 @@ SVNReportParser::~SVNReportParser()
 SVNRepository::ResultCode
 SVNReportParser::innerParseXML(const char* data, int size)
 {
-    if (_d->status != SVNRepository::SVN_NO_ERROR) {
+    if (_d->status != SVNRepository::REPO_NO_ERROR) {
         return _d->status;
     }
     
@@ -568,7 +568,7 @@ SVNReportParser::innerParseXML(const char* data, int size)
 SVNRepository::ResultCode
 SVNReportParser::parseXML(const char* data, int size)
 {
-    if (_d->status != SVNRepository::SVN_NO_ERROR) {
+    if (_d->status != SVNRepository::REPO_NO_ERROR) {
         return _d->status;
     }
     
@@ -586,7 +586,7 @@ SVNReportParser::parseXML(const char* data, int size)
 
 SVNRepository::ResultCode SVNReportParser::finishParse()
 {
-    if (_d->status != SVNRepository::SVN_NO_ERROR) {
+    if (_d->status != SVNRepository::REPO_NO_ERROR) {
         return _d->status;
     }
     

simgear/io/SVNRepository.cxx

@@ -26,6 +26,7 @@
 #include <map>
 #include <set>
 #include <fstream>
+#include <memory>
 
 #include <boost/foreach.hpp>
 
@@ -51,12 +52,12 @@ typedef std::vector<HTTP::Request_ptr> RequestVector;
 class SVNRepoPrivate
 {
 public:
-    SVNRepoPrivate(SVNRepository* parent) : 
-        p(parent), 
+    SVNRepoPrivate(SVNRepository* parent) :
+        p(parent),
         isUpdating(false),
-        status(SVNRepository::SVN_NO_ERROR)
+        status(SVNRepository::REPO_NO_ERROR)
     { ; }
-    
+
     SVNRepository* p; // link back to outer
     SVNDirectory* rootCollection;
     HTTP::Client* http;
@@ -65,42 +66,42 @@ public:
     std::string targetRevision;
     bool isUpdating;
     SVNRepository::ResultCode status;
-    
+
     void svnUpdateDone()
     {
         isUpdating = false;
     }
-    
+
     void updateFailed(HTTP::Request* req, SVNRepository::ResultCode err)
     {
-        SG_LOG(SG_IO, SG_WARN, "SVN: failed to update from:" << req->url()
+        SG_LOG(SG_TERRASYNC, SG_WARN, "SVN: failed to update from:" << req->url()
             << "\n(repository:" << p->baseUrl() << ")");
         isUpdating = false;
         status = err;
     }
-      
+
     void propFindComplete(HTTP::Request* req, DAVCollection* col);
     void propFindFailed(HTTP::Request* req, SVNRepository::ResultCode err);
 };
 
 
 namespace { // anonmouse
-    
+
     string makeAbsoluteUrl(const string& url, const string& base)
     {
       if (strutils::starts_with(url, "http://"))
         return url; // already absolute
-  
+
       assert(strutils::starts_with(base, "http://"));
       int schemeEnd = base.find("://");
       int hostEnd = base.find('/', schemeEnd + 3);
       if (hostEnd < 0) {
         return url;
       }
-  
+
       return base.substr(0, hostEnd) + url;
     }
-    
+
     // keep the responses small by only requesting the properties we actually
     // care about; the ETag, length and MD5-sum
     const char* PROPFIND_REQUEST_BODY =
@@ -120,6 +121,7 @@ namespace { // anonmouse
         Request(repo->baseUrl, "PROPFIND"),
         _repo(repo)
       {
+        assert(repo);
         requestHeader("Depth") = "0";
         setBodyData( PROPFIND_REQUEST_BODY,
                      "application/xml; charset=\"utf-8\"" );
@@ -131,15 +133,17 @@ namespace { // anonmouse
         if (responseCode() == 207) {
             // fine
         } else if (responseCode() == 404) {
-            _repo->propFindFailed(this, SVNRepository::SVN_ERROR_NOT_FOUND);
+            _repo->propFindFailed(this, SVNRepository::REPO_ERROR_NOT_FOUND);
         } else {
-            SG_LOG(SG_IO, SG_WARN, "request for:" << url() << 
+            SG_LOG(SG_TERRASYNC, SG_WARN, "request for:" << url() <<
                 " return code " << responseCode());
-            _repo->propFindFailed(this, SVNRepository::SVN_ERROR_SOCKET);
+            _repo->propFindFailed(this, SVNRepository::REPO_ERROR_SOCKET);
             _repo = NULL;
         }
+
+        Request::responseHeadersComplete();
       }
-  
+
       virtual void onDone()
       {
         if (responseCode() == 207) {
@@ -147,11 +151,11 @@ namespace { // anonmouse
           if (_davStatus.isValid()) {
               _repo->propFindComplete(this, (DAVCollection*) _davStatus.resource());
           } else {
-              _repo->propFindFailed(this, SVNRepository::SVN_ERROR_SOCKET);
+              _repo->propFindFailed(this, SVNRepository::REPO_ERROR_SOCKET);
           }
         }
       }
-  
+
       virtual void gotBodyData(const char* s, int n)
       {
         if (responseCode() != 207) {
@@ -159,16 +163,16 @@ namespace { // anonmouse
         }
         _davStatus.parseXML(s, n);
       }
-        
+
         virtual void onFail()
         {
             HTTP::Request::onFail();
 			if (_repo) {
-				_repo->propFindFailed(this, SVNRepository::SVN_ERROR_SOCKET);
+				_repo->propFindFailed(this, SVNRepository::REPO_ERROR_SOCKET);
 				_repo = NULL;
 			}
         }
-        
+
     private:
       SVNRepoPrivate* _repo;
       DAVMultiStatus _davStatus;
@@ -178,14 +182,14 @@ class UpdateReportRequest:
   public HTTP::Request
 {
 public:
-  UpdateReportRequest(SVNRepoPrivate* repo, 
+  UpdateReportRequest(SVNRepoPrivate* repo,
       const std::string& aVersionName,
       bool startEmpty) :
     HTTP::Request("", "REPORT"),
     _parser(repo->p),
     _repo(repo),
     _failed(false)
-  {       
+  {
     setUrl(repo->vccUrl);
     std::string request =
     "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n"
@@ -215,7 +219,7 @@ protected:
       if (_failed) {
           return;
       }
-      
+
     if (responseCode() == 200) {
           SVNRepository::ResultCode err = _parser.finishParse();
           if (err) {
@@ -225,26 +229,26 @@ protected:
               _repo->svnUpdateDone();
           }
     } else if (responseCode() == 404) {
-        _repo->updateFailed(this, SVNRepository::SVN_ERROR_NOT_FOUND);
+        _repo->updateFailed(this, SVNRepository::REPO_ERROR_NOT_FOUND);
         _failed = true;
     } else {
-        SG_LOG(SG_IO, SG_WARN, "SVN: request for:" << url() <<
+        SG_LOG(SG_TERRASYNC, SG_WARN, "SVN: request for:" << url() <<
         " got HTTP status " << responseCode());
-        _repo->updateFailed(this, SVNRepository::SVN_ERROR_HTTP);
+        _repo->updateFailed(this, SVNRepository::REPO_ERROR_HTTP);
         _failed = true;
     }
   }
 
   virtual void gotBodyData(const char* s, int n)
-  {    
+  {
       if (_failed) {
           return;
       }
-      
+
     if (responseCode() != 200) {
         return;
     }
-    
+
     SVNRepository::ResultCode err = _parser.parseXML(s, n);
     if (err) {
         _failed = true;
@@ -258,7 +262,7 @@ protected:
     {
         HTTP::Request::onFail();
         if (_repo) {
-            _repo->updateFailed(this, SVNRepository::SVN_ERROR_SOCKET);
+            _repo->updateFailed(this, SVNRepository::REPO_ERROR_SOCKET);
             _repo = NULL;
         }
     }
@@ -267,15 +271,15 @@ private:
   SVNRepoPrivate* _repo;
   bool _failed;
 };
-        
-} // anonymous 
+
+} // anonymous
 
 SVNRepository::SVNRepository(const SGPath& base, HTTP::Client *cl) :
-  _d(new SVNRepoPrivate(this))
+    _d(new SVNRepoPrivate(this))
 {
   _d->http = cl;
   _d->rootCollection = new SVNDirectory(this, base);
-  _d->baseUrl = _d->rootCollection->url();  
+  _d->baseUrl = _d->rootCollection->url();
 }
 
 SVNRepository::~SVNRepository()
@@ -309,42 +313,42 @@ bool SVNRepository::isBare() const
     if (!fsBase().exists() || Dir(fsBase()).isEmpty()) {
         return true;
     }
-    
+
     if (_d->vccUrl.empty()) {
         return true;
     }
-    
+
     return false;
 }
 
 void SVNRepository::update()
-{  
-    _d->status = SVN_NO_ERROR;
-    if (_d->targetRevision.empty() || _d->vccUrl.empty()) {        
-        _d->isUpdating = true;        
+{
+    _d->status = REPO_NO_ERROR;
+    if (_d->targetRevision.empty() || _d->vccUrl.empty()) {
+        _d->isUpdating = true;
         PropFindRequest* pfr = new PropFindRequest(_d.get());
         http()->makeRequest(pfr);
         return;
     }
-        
+
     if (_d->targetRevision == rootDir()->cachedRevision()) {
-        SG_LOG(SG_IO, SG_DEBUG, baseUrl() << " in sync at version " << _d->targetRevision);
+        SG_LOG(SG_TERRASYNC, SG_DEBUG, baseUrl() << " in sync at version " << _d->targetRevision);
         _d->isUpdating = false;
         return;
     }
-    
+
     _d->isUpdating = true;
-    UpdateReportRequest* urr = new UpdateReportRequest(_d.get(), 
+    UpdateReportRequest* urr = new UpdateReportRequest(_d.get(),
         _d->targetRevision, isBare());
     http()->makeRequest(urr);
 }
-  
+
 bool SVNRepository::isDoingSync() const
 {
-    if (_d->status != SVN_NO_ERROR) {
+    if (_d->status != REPO_NO_ERROR) {
         return false;
     }
-    
+
     return _d->isUpdating || _d->rootCollection->isDoingSync();
 }
 
@@ -365,16 +369,16 @@ void SVNRepoPrivate::propFindComplete(HTTP::Request* req, DAVCollection* c)
 {
     targetRevision = c->versionName();
     vccUrl = makeAbsoluteUrl(c->versionControlledConfiguration(), baseUrl);
-    rootCollection->collection()->setVersionControlledConfiguration(vccUrl);    
+    rootCollection->collection()->setVersionControlledConfiguration(vccUrl);
     p->update();
 }
-  
+
 void SVNRepoPrivate::propFindFailed(HTTP::Request *req, SVNRepository::ResultCode err)
 {
-    if (err != SVNRepository::SVN_ERROR_NOT_FOUND) {
-        SG_LOG(SG_IO, SG_WARN, "PropFind failed for:" << req->url());
+    if (err != SVNRepository::REPO_ERROR_NOT_FOUND) {
+        SG_LOG(SG_TERRASYNC, SG_WARN, "PropFind failed for:" << req->url());
     }
-    
+
     isUpdating = false;
     status = err;
 }

simgear/io/SVNRepository.hxx

@@ -17,62 +17,43 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 
-#ifndef SG_IO_DAVMIRRORTREE_HXX
-#define SG_IO_DAVMIRRORTREE_HXX
+#ifndef SG_IO_SVN_REPOSITORY_HXX
+#define SG_IO_SVN_REPOSITORY_HXX
 
-#include <string>
-#include <vector>
+#include <simgear/io/AbstractRepository.hxx>
 #include <memory>
 
-#include <simgear/misc/sg_path.hxx>
-
 namespace simgear  {
-  
-  namespace HTTP {
-    class Client;
-  }
-  
-class SVNDirectory;  
+
+class SVNDirectory;
 class SVNRepoPrivate;
 
-class SVNRepository
+class SVNRepository : public AbstractRepository
 {
 public:
-  
+
     SVNRepository(const SGPath& root, HTTP::Client* cl);
-    ~SVNRepository();
+    virtual ~SVNRepository();
 
     SVNDirectory* rootDir() const;
-    SGPath fsBase() const;
+    virtual SGPath fsBase() const;
 
-    void setBaseUrl(const std::string& url);
-    std::string baseUrl() const;
+    virtual void setBaseUrl(const std::string& url);
+    virtual std::string baseUrl() const;
 
-    HTTP::Client* http() const;
+    virtual HTTP::Client* http() const;
 
-    void update();
+    virtual void update();
 
-    bool isDoingSync() const;
-    
-    enum ResultCode {
-        SVN_NO_ERROR = 0,
-        SVN_ERROR_NOT_FOUND,
-        SVN_ERROR_SOCKET,
-        SVN_ERROR_XML,
-        SVN_ERROR_TXDELTA,
-        SVN_ERROR_IO,
-        SVN_ERROR_CHECKSUM,
-        SVN_ERROR_FILE_NOT_FOUND,
-        SVN_ERROR_HTTP
-    };
-    
-    ResultCode failure() const;
+    virtual bool isDoingSync() const;
+
+    virtual ResultCode failure() const;
 private:
     bool isBare() const;
-    
+
     std::auto_ptr<SVNRepoPrivate> _d;
 };
 
 } // of namespace simgear
 
-#endif // of SG_IO_DAVMIRRORTREE_HXX
+#endif // of SG_IO_SVN_REPOSITORY_HXX

simgear/io/http_repo_sync.cxx

@@ -0,0 +1,82 @@
+
+#include <cstdio>
+#include <cstring>
+#include <signal.h>
+
+#include <iostream>
+#include <boost/foreach.hpp>
+
+
+#include <simgear/io/sg_file.hxx>
+#include <simgear/io/HTTPClient.hxx>
+#include <simgear/io/HTTPRepository.hxx>
+#include <simgear/misc/strutils.hxx>
+#include <simgear/timing/timestamp.hxx>
+#include <simgear/misc/sg_dir.hxx>
+#include <simgear/debug/logstream.hxx>
+
+using namespace simgear;
+using std::cout;
+using std::endl;
+using std::cerr;
+using std::string;
+
+int main(int argc, char* argv[])
+{
+    HTTP::Client cl;
+    string proxy, proxyAuth;
+    string_list headers;
+    string url;
+
+    sglog().setLogLevels( SG_ALL, SG_INFO );
+
+    for (int a=0; a<argc;++a) {
+        if (argv[a][0] == '-') {
+            if (!strcmp(argv[a], "--proxy")) {
+                proxy = argv[++a];
+            } else if (!strcmp(argv[a], "--auth")) {
+                proxyAuth = argv[++a];
+            }
+        } else { // of argument starts with a hyphen
+            url = argv[a];
+        }
+    } // of arguments iteration
+
+    if (!proxy.empty()) {
+        int colonPos = proxy.find(':');
+        string proxyHost = proxy;
+        int proxyPort = 8800;
+        if (colonPos >= 0) {
+            proxyHost = proxy.substr(0, colonPos);
+            proxyPort = strutils::to_int(proxy.substr(colonPos + 1));
+        }
+
+        cl.setProxy(proxyHost, proxyPort, proxyAuth);
+    }
+
+#ifndef WIN32
+    signal(SIGPIPE, SIG_IGN);
+#endif
+
+    if (url.empty()) {
+        cerr << "no URL argument specificed" << endl;
+        return EXIT_FAILURE;
+    }
+
+    SGPath rootPath = simgear::Dir::current().path();
+    HTTPRepository* repo = new HTTPRepository(rootPath, &cl);
+    repo->setBaseUrl(url);
+    repo->update();
+
+    while (repo->isDoingSync()) {
+        cl.update();
+        SGTimeStamp::sleepForMSec(100);
+    }
+
+    if (repo->failure() != AbstractRepository::REPO_NO_ERROR) {
+        cerr << "got response:" << repo->failure() << endl;
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}

simgear/io/raw_socket.cxx

@@ -684,6 +684,15 @@ bool Socket::isNonBlockingError ()
 #endif
 }
 
+int Socket::errorNumber()
+{
+#if defined(WINSOCK)
+    return WSAGetLastError();
+#else
+    return errno;
+#endif
+}
+
 
 //////////////////////////////////////////////////////////////////////
 //

simgear/io/raw_socket.hxx

@@ -101,7 +101,8 @@ public:
   void setBroadcast ( bool broadcast ) ;
 
   static bool isNonBlockingError () ;
-  
+  static int errorNumber();
+
   static int select ( Socket** reads, Socket** writes, int timeout ) ;
 } ;
 

simgear/io/sg_file.cxx

@@ -45,8 +45,9 @@
 #include "sg_file.hxx"
 
 
-SGFile::SGFile(const std::string &file, int repeat_)
-    : file_name(file), fp(-1), eof_flag(true), repeat(repeat_), iteration(0)
+SGFile::SGFile(const std::string &file, int repeat_, int extraoflags_ )
+    : file_name(file), fp(-1), eof_flag(true), repeat(repeat_), iteration(0),
+      extraoflags(extraoflags_)
 {
     set_type( sgFileType );
 }
@@ -70,13 +71,13 @@ bool SGFile::open( const SGProtocolDir d ) {
 
     if ( get_dir() == SG_IO_OUT ) {
 #ifdef _WIN32
-        int mode = 00666;
+        int mode = _S_IREAD | _S_IWRITE;
 #else
         mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
 #endif
-	fp = ::open( file_name.c_str(), O_WRONLY | O_CREAT | O_TRUNC, mode );
+	fp = ::open( file_name.c_str(), O_WRONLY | O_CREAT | O_TRUNC | extraoflags, mode );
     } else if ( get_dir() == SG_IO_IN ) {
-	fp = ::open( file_name.c_str(), O_RDONLY );
+	fp = ::open( file_name.c_str(), O_RDONLY | extraoflags );
     } else {
 	SG_LOG( SG_IO, SG_ALERT, 
 		"Error:  bidirection mode not available for files." );
@@ -178,3 +179,12 @@ bool SGFile::close() {
     eof_flag = true;
     return true;
 }
+
+SGBinaryFile::SGBinaryFile( const std::string& file, int repeat_ ) :
+#ifdef _WIN32
+    SGFile(file,repeat_, _O_BINARY)
+#else
+    SGFile(file,repeat_, 0)
+#endif
+{
+}

simgear/io/sg_file.hxx

@@ -39,6 +39,7 @@ class SGFile : public SGIOChannel {
     const int repeat;
     int iteration;              // number of current repetition,
                                 // starting at 0
+    int extraoflags;
 
 public:
 
@@ -50,7 +51,7 @@ public:
      * @param file name of file to open
      * @param repeat On eof restart at the beginning of the file
      */
-    SGFile( const std::string& file, int repeat_ = 1 );
+    SGFile( const std::string& file, int repeat_ = 1, int extraoflags = 0);
 
     /**
      * Create an SGFile from an existing, open file-descriptor
@@ -85,4 +86,9 @@ public:
     virtual bool eof() const { return eof_flag; };
 };
 
+class SGBinaryFile : public SGFile {
+public:
+    SGBinaryFile( const std::string& file, int repeat_ = 1 );
+};
+
 #endif // _SG_FILE_HXX

simgear/io/sg_netChannel.cxx

@@ -114,7 +114,7 @@ NetChannel::send (const void * buffer, int size, int flags)
     write_blocked = true ;
     return 0;
   } else {
-    this->handleError (result);
+    this->handleError (errorNumber());
     close();
     return -1;
   }
@@ -134,7 +134,7 @@ NetChannel::recv (void * buffer, int size, int flags)
   } else if (isNonBlockingError ()) {
     return 0;
   } else {
-    this->handleError (result);
+    this->handleError (errorNumber());
     close();
     return -1;
   }
@@ -207,7 +207,7 @@ NetChannel::handleResolve()
         return 0;
     } else {
         // some other error condition
-        handleError (result);
+        handleError (errorNumber());
         close();
         return -1;
     }
@@ -227,6 +227,13 @@ void NetChannel::handleAccept (void) {
 
 void NetChannel::handleError (int error)
 {
+    if (error == EINPROGRESS) {
+        // this shoudl never happen, because we should use isNonBlocking to check
+        // such error codes.
+        SG_LOG(SG_IO, SG_WARN, "Got EINPROGRESS at NetChannel::handleError: suggests broken logic somewhere else");
+        return; // not an actual error, don't warn
+    }
+
     // warn about address lookup failures seperately, don't warn again.
     // (and we (ab-)use ENOENT to mean 'name not found'.
     if (error != ENOENT) {
@@ -251,6 +258,11 @@ NetChannelPoller::removeChannel(NetChannel* channel)
     assert(channel->poller == this);
     channel->poller = NULL;
     
+    // portability: MSVC throws assertion failure when empty
+    if (channels.empty()) {
+        return;
+    }
+
     ChannelList::iterator it = channels.begin();
     for (; it != channels.end(); ++it) {
         if (*it == channel) {

simgear/io/sg_netChat.cxx

@@ -27,6 +27,7 @@
 
 #include <cstring>
 #include <cstdlib>
+#include <algorithm>
 
 namespace  simgear {
 

simgear/io/sg_socket_udp.cxx

@@ -32,6 +32,7 @@
 
 #include <cstring>
 #include <cstdlib> // for atoi
+#include <algorithm>
 
 using std::string;