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udp: Clarify the comment about binding the multicast address

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Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-03-08 15:15:11 +02:00
parent 113d3e106d
commit 1b89bcdd7f
1 changed files with 3 additions and 1 deletions
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4
libavformat/udp.c
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@ -380,7 +380,9 @@ static int udp_open(URLContext *h, const char *uri, int flags)
goto fail;
}
/* if multicast, try the multicast address bind first */
/* If multicast, try binding the multicast address first, to avoid
* receiving UDP packets from other sources aimed at the same UDP
* port. This fails on windows. */
if (s->is_multicast && (h->flags & AVIO_FLAG_READ)) {
bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len);
}