[FFmpeg-devel] [PATCH] Fix setsockopt IP_MULTICAST_TTL on OpenBSD

[Brad Smith]

Fix setsockopt() usage on OpenBSD with IP_MULTICAST_TTL. The field
type should be an unsigned char on anything but Linux.


diff --git a/libavformat/udp.c b/libavformat/udp.c
index 180d96a988..29aa865fff 100644
--- a/libavformat/udp.c
+++ b/libavformat/udp.c
@@ -163,7 +163,13 @@ static int udp_set_multicast_ttl(int sockfd, int mcastTTL,
 {
 #ifdef IP_MULTICAST_TTL
     if (addr->sa_family == AF_INET) {
-        if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
+#ifdef __linux__
+        int ttl = mcastTTL;
+#else
+        unsigned char ttl = mcastTTL;
+#endif
+
+        if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)) < 0) {
             ff_log_net_error(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL)");
             return ff_neterrno();
         }