On Sat, 5 Feb 2022, lance.lmw...@gmail.com wrote:
From: Limin Wang <lance.lmw...@gmail.com>
Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
---
libavformat/udp.c | 31 ++++++++++++++++++++-----------
1 file changed, 20 insertions(+), 11 deletions(-)
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 83c042d..3dc79eb 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -162,22 +162,31 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
struct sockaddr *addr,
void *logctx)
{
+ int protocol, cmd;
+
+ switch (addr->sa_family) {
#ifdef IP_MULTICAST_TTL
- if (addr->sa_family == AF_INET) {
- if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL,
sizeof(mcastTTL)) < 0) {
- ff_log_net_error(logctx, AV_LOG_ERROR,
"setsockopt(IP_MULTICAST_TTL)");
- return ff_neterrno();
- }
- }
+ case AF_INET:
+ protocol = IPPROTO_IP;
+ cmd = IP_MULTICAST_TTL;
+ break;
#endif
#if defined(IPPROTO_IPV6) && defined(IPV6_MULTICAST_HOPS)
- if (addr->sa_family == AF_INET6) {
- if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL,
sizeof(mcastTTL)) < 0) {
- ff_log_net_error(logctx, AV_LOG_ERROR,
"setsockopt(IPV6_MULTICAST_HOPS)");
+ case AF_INET6:
+ protocol = IPPROTO_IPV6;
+ cmd = IPV6_MULTICAST_HOPS;
+ break;
+#endif
+ default:
+ errno = EAFNOSUPPORT;
This is not portable, ff_neterrno is different for winsock. Maybe you
should simply remove the default case, to make it work like the old code,
and not mix behaviour changes with factorization.
return ff_neterrno();
- }
}
-#endif
+
+ if (setsockopt(sockfd, protocol, cmd, &mcastTTL, sizeof(mcastTTL)) < 0) {
+ ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt");
"setsockopt(IPV4/IPV6 MULTICAST TTL)", so we know that the issue was with
TTL setting?
Thanks,
Marton
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