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udp: Use the IP_ADD_MEMBERSHIP socket option. 

For some reason, MCAST_JOIN_GROUP is not working under uClinux. We can
just stick with the more traditional method.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
master
Richard Cochran 2011-12-30 10:19:21 +01:00
parent 447d4d442c
commit 5555a2f029
1 changed files with 8 additions and 8 deletions
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16
udp.c
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@ -143,15 +143,15 @@ static int mcast_join(int fd, int index, const struct sockaddr *grp,
socklen_t grplen)
{
int err;
struct group_req req;
req.gr_interface = index;
if (grplen > sizeof(req.gr_group)) {
return -1;
}
memcpy(&req.gr_group, grp, grplen);
err = setsockopt(fd, IPPROTO_IP, MCAST_JOIN_GROUP, &req, sizeof(req));
struct ip_mreqn req;
struct sockaddr_in *sa = (struct sockaddr_in *) grp;
memset(&req, 0, sizeof(req));
memcpy(&req.imr_multiaddr, &sa->sin_addr, sizeof(struct in_addr));
req.imr_ifindex = index;
err = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &req, sizeof(req));
if (err) {
pr_err("setsockopt MCAST_JOIN_GROUP failed: %m");
pr_err("setsockopt IP_ADD_MEMBERSHIP failed: %m");
return -1;
}
return 0;