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udp: Fix crashes after adding AVOptions

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Add a missing AVClass member, check whether localaddr is null.
(Previously, localaddr was always a local stack buffer, while it
now also can be an avoption string which can be null.)

This fixes crashes when not passing any localaddr parameter, since
66028b7ba.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2015-03-19 09:28:25 +02:00
parent 8692d74b73
commit 8dc72eeaf6
1 changed files with 2 additions and 1 deletions
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3
libavformat/udp.c
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@ -42,6 +42,7 @@
#endif
typedef struct UDPContext {
const AVClass *class;
int udp_fd;
int ttl;
int buffer_size;
@ -293,7 +294,7 @@ static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr,
if (((struct sockaddr *) &s->dest_addr)->sa_family)
family = ((struct sockaddr *) &s->dest_addr)->sa_family;
res0 = udp_resolve_host(localaddr[0] ? localaddr : NULL, s->local_port,
res0 = udp_resolve_host((localaddr && localaddr[0]) ? localaddr : NULL, s->local_port,
SOCK_DGRAM, family, AI_PASSIVE);
if (res0 == 0)
goto fail;