RFC4191 route information option.

src/radv-protocol.h

@@ -50,6 +50,7 @@ struct prefix_opt {
 #define ICMP6_OPT_PREFIX       3
 #define ICMP6_OPT_MTU          5
 #define ICMP6_OPT_ADV_INTERVAL 7
+#define ICMP6_OPT_RT_INFO     24
 #define ICMP6_OPT_RDNSS       25
 #define ICMP6_OPT_DNSSL       31