In mxf muxer, check the return value of gmtime, fix #2494

[ffmpeg] / libavformat / network.h

diff --git a/libavformat/network.h b/libavformat/network.h
index 0fbcbbb22787252b5fabda7e796c9ebe67153b79..d6aee931217d419b2a4718d328bf046a197b9413 100644 (file)
--- a/libavformat/network.h
+++ b/libavformat/network.h
@@ -151,4 +151,29 @@ const char *ff_gai_strerror(int ecode);
 #define gai_strerror ff_gai_strerror
 #endif
 
+#ifndef INET6_ADDRSTRLEN
+#define INET6_ADDRSTRLEN INET_ADDRSTRLEN
+#endif
+
+#ifndef IN_MULTICAST
+#define IN_MULTICAST(a) ((((uint32_t)(a)) & 0xf0000000) == 0xe0000000)
+#endif
+#ifndef IN6_IS_ADDR_MULTICAST
+#define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff)
+#endif
+
+static inline int ff_is_multicast_address(struct sockaddr *addr)
+{
+    if (addr->sa_family == AF_INET) {
+        return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
+    }
+#if HAVE_STRUCT_SOCKADDR_IN6
+    if (addr->sa_family == AF_INET6) {
+        return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
+    }
+#endif
+
+    return 0;
+}
+
 #endif /* AVFORMAT_NETWORK_H */