bsd/netinet6/nd6_rtr.c

479 			ndi->reachable = ND_COMPUTE_RTIME(ndi->basereachable);
1183  * 1) Routers that are reachable or probably reachable should be preferred.
1184  *    If we have more than one (probably) reachable router, prefer ones
1186  * 2) When no routers on the list are known to be reachable or
1187  *    probably reachable, routers SHOULD be selected in a round-robin
1195  *    router will be set to the reachable router on that link (if any) with
1200  *    the one installed will be the static or the first encountered reachable
1202  * c) When no routers on the list are known to be reachable, or probably
1203  *    reachable, no round-robin selection will take place when the default
1258 	 * Search for a (probably) reachable router from the list.
1259 	 * We just pick up the first reachable one (if any), assuming that
1268 		boolean_t reachable, advrouter;
1274 		reachable = FALSE;
1289 				reachable = TRUE;
1322 			 * reachable, try to install it later on below.
1325 			if (!advrouter && (reachable ||
1427 	 * If none of the default routers was found to be reachable,
1432 	 * (reachable) router should really be preferred to the installed one.
1433 	 * We only prefer the new router when the old one is not reachable
1493 		 * If the installed router is no longe reachable, remove
2880  * detect if a given prefix has a (probably) reachable advertising router.
2924  * entry is reachable or probably reachable).
2956 	 * Check if there is a prefix that has a reachable advertising
3014 		 * There is at least one prefix that has a reachable router,
3019 		 * Detach prefixes which have no reachable advertising
3058 		/* there is no prefix that has a reachable router */