Index: uspace/lib/c/include/net/socket_codes.h
===================================================================
--- uspace/lib/c/include/net/socket_codes.h	(revision 257feec9d30b7aa8ced34c0ef045309a9cc98d3c)
+++ uspace/lib/c/include/net/socket_codes.h	(revision 6749febbf14fcee65590d678af2d7f90b8921903)
@@ -75,4 +75,13 @@
 typedef int32_t socklen_t;
 
+/* Socket options */
+
+enum {
+	SOL_SOCKET = 1,
+
+	/* IP link to transmit on */
+	SO_IPLINK
+};
+
 #endif