udp: turn off multicast loop back.
This option is on by default, but we don't want or need it. Signed-off-by: Richard Cochran <richardcochran@gmail.com>master
parent
5555a2f029
commit
95d5c36c0f
7
udp.c
7
udp.c
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@ -142,7 +142,7 @@ static int mcast_bind(int fd, int index)
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static int mcast_join(int fd, int index, const struct sockaddr *grp,
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socklen_t grplen)
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{
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int err;
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int err, off = 0;
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struct ip_mreqn req;
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struct sockaddr_in *sa = (struct sockaddr_in *) grp;
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@ -154,6 +154,11 @@ static int mcast_join(int fd, int index, const struct sockaddr *grp,
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pr_err("setsockopt IP_ADD_MEMBERSHIP failed: %m");
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return -1;
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}
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err = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, &off, sizeof(off));
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if (err) {
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pr_err("setsockopt IP_MULTICAST_LOOP failed: %m");
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return -1;
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}
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return 0;
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}
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