130 lines
2.6 KiB
C++
130 lines
2.6 KiB
C++
#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <sys/time.h>
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#include <net/if.h>
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#include <netdb.h>
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#include <string.h>
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#if defined(__linux)
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# include <linux/sockios.h>
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#elif defined(__FreeBSD__)
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# include <sys/sockio.h>
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#elif defined(__sgi)
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# include <net/soioctl.h>
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#else
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# error Teach me how to build on this system
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#endif
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#include "broadcaster.h"
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#define _VERBOSE 1
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Broadcaster::Broadcaster( void )
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{
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_port = 0;
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_initialized = false;
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_buffer = 0L;
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_address = 0;
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}
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Broadcaster::~Broadcaster( void )
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{
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close( _so );
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}
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bool Broadcaster::init( void )
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{
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if( _port == 0 )
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{
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fprintf( stderr, "Broadcaster::init() - port not defined\n" );
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return false;
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}
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if( (_so = socket( AF_INET, SOCK_DGRAM, 0 )) < 0 )
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{
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perror( "socket" );
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return false;
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}
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int on = 1;
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setsockopt( _so, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
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saddr.sin_family = AF_INET;
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saddr.sin_port = htons( _port );
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if( _address == 0 )
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{
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struct ifreq ifr;
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setsockopt( _so, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on));
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#ifdef __linux
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strcpy( ifr.ifr_name, "eth0" );
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#else
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strcpy( ifr.ifr_name, "ef0" );
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#endif
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if( (ioctl( _so, SIOCGIFBRDADDR, &ifr)) < 0 )
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{
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perror( "Broadcaster::init() Cannot get Broadcast Address" );
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return false;
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}
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saddr.sin_addr.s_addr = (
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((sockaddr_in *)&ifr.ifr_broadaddr)->sin_addr.s_addr);
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}
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else
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{
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saddr.sin_addr.s_addr = _address;
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}
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#ifdef _VERBOSE
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unsigned char *ptr = (unsigned char *)&saddr.sin_addr.s_addr;
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printf( "Broadcast address : %u.%u.%u.%u\n", ptr[0], ptr[1], ptr[2], ptr[3] );
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#endif
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_initialized = true;
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return _initialized;
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}
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void Broadcaster::setHost( const char *hostname )
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{
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struct hostent *h;
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if( (h = gethostbyname( hostname )) == 0L )
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{
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fprintf( stderr, "Broadcaster::setHost() - Cannot resolv an address for \"%s\".\n", hostname );
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_address = 0;
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}
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else
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_address = *(( unsigned long *)h->h_addr);
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}
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void Broadcaster::setPort( const short port )
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{
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_port = port;
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}
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void Broadcaster::setBuffer( void *buffer, const unsigned int size )
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{
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_buffer = buffer;
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_buffer_size = size;
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}
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void Broadcaster::sync( void )
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{
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_initialized || init();
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if( _buffer == 0L )
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{
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fprintf( stderr, "Broadcaster::sync() - No buffer\n" );
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return;
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}
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unsigned int size = sizeof( struct sockaddr_in );
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sendto( _so, (const void *)_buffer, _buffer_size,
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0, (struct sockaddr *)&saddr, size );
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}
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