#include <stdio.h>
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#define IFINDEX 5  //Please adjust me first.

int main(int argc, char argv[])
{
	int sockfds[2];
	struct ipv6_mreq req;
	struct group_filter filter;
	struct sockaddr_in6 *psin6;
	req.ipv6mr_interface = IFINDEX;
	inet_pton(PF_INET6, "FF02::2000", &req.ipv6mr_multiaddr);

	sockfds[0] = socket(PF_INET6, SOCK_DGRAM, 0);
	sockfds[1] = socket(PF_INET6, SOCK_DGRAM, 0);

	filter.gf_interface = IFINDEX;
	filter.gf_fmode = MCAST_INCLUDE;
	filter.gf_numsrc = 1;
	psin6 = (struct sockaddr_in6 *)&filter.gf_group;
	psin6->sin6_family = AF_INET6;
	inet_pton(PF_INET6, "FF02::2000", &psin6->sin6_addr);
	psin6 = (struct sockaddr_in6 *)&filter.gf_slist[0];
	psin6->sin6_family = AF_INET6;
	inet_pton(PF_INET6, "2002:de12:1780::1", &psin6->sin6_addr);

	setsockopt(sockfds[0], SOL_IPV6, IPV6_ADD_MEMBERSHIP, &req, sizeof(req));
	setsockopt(sockfds[0], SOL_IPV6, MCAST_MSFILTER, &filter, sizeof(filter));
	sleep(10); //wait state change reports
	printf("change mode to exclude\n");
	setsockopt(sockfds[1], SOL_IPV6, IPV6_ADD_MEMBERSHIP, &req, sizeof(req));

	pause();
	return 0;
}