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Date: Tue, 13 May 2014 16:19:46 +0200
From: Moritz Warning <moritzwarning AT web DOT de>
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To: cygwin AT cygwin DOT com
Subject: bind to multicast address fails
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Hi,

I try to bind a socket to a multicast address (239.192.202.5). But it fails with an error:
"Cannot assign requested address"

Is this not supported using Cygwin? I've added a simple test program in case someone wants
to verify.

Thanks,
mwarning
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#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/socket.h>

int main( int argc, char **argv ) {
	struct sockaddr_in sockaddr;
	if( inet_pton(AF_INET, "239.192.202.5", &sockaddr.sin_addr) != 1 ) {
		printf("parse errorr\n");
		return 1;
	}
	sockaddr.sin_family = AF_INET;
	sockaddr.sin_port = htons(6771);

	int sock = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );

	socklen_t addrlen= sizeof(struct sockaddr_in);
	if( bind( sock, (struct sockaddr*) &sockaddr, addrlen ) < 0 ) {
		//close( sock );
		printf( "Failed to bind socket to address: %s\n", strerror( errno ) );
		return 1;
	}

	printf("It works.\n");
	//close( sock );
	return 0;
}

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