diff --git a/src/cw/sock_setport.c b/src/cw/sock_setport.c
index bcd38bba..8ec25d39 100644
--- a/src/cw/sock_setport.c
+++ b/src/cw/sock_setport.c
@@ -1,21 +1,59 @@
+/*
+    This file is part of actube.
+
+    actube is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libcapwap is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
 #include "sock.h"
 
 #include <sys/socket.h>
 #include <netinet/in.h>
 
+/**
+ * @file 
+ * @brief implements sock_setport
+ */
+
+/**
+ * @addtogroup SOCK
+ * @{
+ */
+
+/**
+ * Set the port number of a sockaddr
+ * @param addr sockaddr where the port will be set
+ * @param port number
+ * @return 1 if successful, otherwise 0
+ * Ports can only be set for sockaddrs of type AF_INET and AF_INET6
+ */
 int sock_setport(struct sockaddr *addr, int port)
 {
 	switch (addr->sa_family){
 		case AF_INET:
 			((struct sockaddr_in*)addr)->sin_port=htons(port);
 			break;
-#ifdef WITH_IPV6
 		case AF_INET6:
 			((struct sockaddr_in6*)addr)->sin6_port=htonl(port);
 			break;
-#endif
 		default:
 			return 0;
 	}
 	return 1;
 }
+
+/**
+ * @}
+ */
+