From: Limin Wang <lance.lmw...@gmail.com>
Suggested by zhilizhao, vlc project has solved the compatibility by
the same way, so I borrowed the comments from vlc project.
Fix #ticket9449
Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
---
libavformat/udp.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/libavformat/udp.c b/libavformat/udp.c
index 3dc79eb..34488d6 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -164,6 +164,10 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
{
int protocol, cmd;
+ /* There is some confusion in the world whether IP_MULTICAST_TTL
+ * takes a byte or an int as an argument.
+ * BSD seems to indicate byte so we are going with that and use
+ * int as a fallback to be safe */
switch (addr->sa_family) {
#ifdef IP_MULTICAST_TTL
case AF_INET:
@@ -183,8 +187,15 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
}
if (setsockopt(sockfd, protocol, cmd, &mcastTTL, sizeof(mcastTTL)) < 0) {
- ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt");
- return ff_neterrno();
+ /* BSD compatibility */
+ unsigned char ttl;
+
+ ff_log_net_error(logctx, AV_LOG_DEBUG, "setsockopt");
+ ttl = (unsigned char)(( mcastTTL > 255 ) ? 255 : mcastTTL);
+ if (setsockopt(sockfd, protocol, cmd, &ttl, sizeof(ttl)) < 0) {
+ ff_log_net_error(logctx, AV_LOG_ERROR, "setsockopt");
+ return ff_neterrno();
+ }
}
return 0;
--
1.8.3.1
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
