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@krgn
Created Dec 13, 2015
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Multicast Sender
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <time.h>
#include <string.h>
#include <stdio.h>
#define HELLO_PORT 12345
#define HELLO_GROUP "225.0.0.37"
int
main(int argc, char *argv[])
{
struct sockaddr_in addr;
int fd, cnt;
struct ip_mreq mreq;
char *message=argv[1];
/* create what looks like an ordinary UDP socket */
if ((fd=socket(AF_INET,SOCK_DGRAM,0)) < 0) {
perror("socket");
exit(1);
}
/* set up destination address */
memset(&addr,0,sizeof(addr));
addr.sin_family=AF_INET;
addr.sin_addr.s_addr=inet_addr(HELLO_GROUP);
addr.sin_port=htons(HELLO_PORT);
/* now just sendto() our destination! */
while (1) {
if (sendto(fd,message,sizeof(message),0,(struct sockaddr *) &addr,
sizeof(addr)) < 0) {
perror("sendto");
exit(1);
}
sleep(1);
}
}
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