1 files changed, 6 insertions, 0 deletions
diff --git a/socket.h b/socket.h
index cd24011..eef98d1 100644
--- a/socket.h
+++ b/socket.h
@@ -509,6 +509,12 @@ legal_ipv4_port (int port)
   return port > 0 && port < 65536;
 }
 
+static inline int
+is_proto_tcp(const int p)
+{
+  return p > 0; /* depends on the definition of PROTO_x */
+}
+
 static inline bool
 link_socket_proto_connection_oriented (int proto)
 {