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udp: Enable address reuse by default for multicast

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Keep the original corner case behaviour, where reuse is enabled
for the case where no argument is given to the reuse url option.

Signed-off-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 00952be424)
This commit is contained in:
David Fries 2011-02-07 23:14:43 +02:00 committed by Michael Niedermayer
parent c3052f1dcc
commit 9087a46d55
1 changed files with 15 additions and 2 deletions
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17
libavformat/udp.c
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@ -313,6 +313,7 @@ static int udp_open(URLContext *h, const char *uri, int flags)
char buf[256];
struct sockaddr_storage my_addr;
int len;
int reuse_specified = 0;
h->is_streamed = 1;
h->max_packet_size = 1472;
@ -329,7 +330,14 @@ static int udp_open(URLContext *h, const char *uri, int flags)
p = strchr(uri, '?');
if (p) {
s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
if (find_info_tag(buf, sizeof(buf), "reuse", p)) {
const char *endptr=NULL;
s->reuse_socket = strtol(buf, &endptr, 10);
/* assume if no digits were found it is a request to enable it */
if (buf == endptr)
s->reuse_socket = 1;
reuse_specified = 1;
}
if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
s->ttl = strtol(buf, NULL, 10);
}
@ -366,9 +374,14 @@ static int udp_open(URLContext *h, const char *uri, int flags)
if (udp_fd < 0)
goto fail;
if (s->reuse_socket)
/* Follow the requested reuse option, unless it's multicast in which
* case enable reuse unless explicitely disabled.
*/
if (s->reuse_socket || (s->is_multicast && !reuse_specified)) {
s->reuse_socket = 1;
if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
goto fail;
}
/* the bind is needed to give a port to the socket now */
/* if multicast, try the multicast address bind first */