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-rw-r--r--lib/socket.h12
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/socket.h b/lib/socket.h
index 2c5ab4f8..bb9c1c3d 100644
--- a/lib/socket.h
+++ b/lib/socket.h
@@ -55,8 +55,16 @@ void sk_dump_all(void);
#define SK_TCP 2
#define SK_UDP 3 /* ? ? - - - ? ? */
#define SK_UDP_MC 4 /* ? ? * * * * - */
-#define SK_IP 5 /* ? ? - * - ? ? */
-#define SK_IP_MC 6 /* ? ? * * * * - */
+#define SK_IP 5 /* ? - - * - ? ? */
+#define SK_IP_MC 6 /* ? - * * * * - */
#define SK_MAGIC 7 /* Internal use by sysdep code */
+/*
+ * Multicast sockets are slightly different from the other ones:
+ * If you want to send packets only, just set the destination
+ * address to the corresponding multicast group and iface to
+ * the interface to be used. If you also want receiving, set
+ * source address to the same multicast group as well.
+ */
+
#endif