bsd/netinet6/nd6_rtr.c

366  * TODO: on-link bit on prefix information
496 	 * prefix
514 				    "len %d for prefix information option, "
521 				    "nd6_ra_input: invalid prefix "
522 				    "len %d for prefix information option, "
530 				    "nd6_ra_input: invalid prefix "
555 			 * + nd6_accept_6to4 == 0 && address has 6to4 prefix
562 				    "nd6_ra_input: no SLAAC on prefix %s "
570 				    "nd6_ra_input: no SLAAC on prefix %s "
579 				continue; /* prefix lifetime init failed */
597 				log(LOG_DEBUG, "%s: unable to MALLOC RA prefix "
1066 	 * Also delete all the pointers to the router in each prefix lists.
1224 	 * We no longer install (default) interface route; only prefix routes
2126 	/* make prefix in the canonical form */
2146 			    "the prefix %s/%d on-link %s on %s (errno=%d)\n",
2190 	/* make sure to invalidate the prefix until it is really freed. */
2224 	/* free list of routers that adversed the prefix */
2286 		 * prefix on a same interface.
2290 		 * Update prefix information.  Note that the on-link (L) bit
2315 				    "the prefix %s/%d on-link on %s "
2355 		 * XXX: from the ND point of view, we can ignore a prefix
2357 		 * prefix structure for references from autoconfigured
2358 		 * addresses.  Thus, we explicitly make sure that the prefix
2377 	/* 5.5.3 (a). Ignore the prefix without the A bit set. */
2382 	 * 5.5.3 (b). the link-local prefix should have been ignored in
2393 	 * 5.5.3 (d).  If the prefix advertised is not equal to the prefix of
2397 	 * a matching prefix.
2435 		 * Ignore the address if it is not associated with a prefix
2436 		 * or is associated with a prefix that is different from this
2555 		 * If the sum of the prefix length and interface identifier
2880  * detect if a given prefix has a (probably) reachable advertising router.
2922  * Check if each prefix in the prefix list has at least one available router
2923  * that advertised the prefix (a router is "available" if its neighbor cache
2925  * If the check fails, the prefix may be off-link, because, for example,
2926  * we have moved from the network but the lifetime of the prefix has not
2927  * expired yet.  So we should not use the prefix if there is another prefix
2929  * But, if there is no prefix that has an available router, we still regards
2956 	 * Check if there is a prefix that has a reachable advertising
2980 		 * us from checking the same prefix twice.
2991 	 * If we have no such prefix, check whether we still have a router
3014 		 * There is at least one prefix that has a reachable router,
3053 			 * the same prefix twice.
3058 		/* there is no prefix that has a reachable router */
3085 	 * prefix, and reinstall the interface route for a (just) attached
3086 	 * prefix.  Note that all attempt of reinstallation does not
3087 	 * necessarily success, when a same prefix is shared among multiple
3135 	 * Changes on the prefix status might affect address status as well.
3136 	 * Make sure that all addresses derived from an attached prefix are
3137 	 * attached, and that all addresses derived from a detached prefix are
3164 			 * (i.e. the address exists, but the prefix does not).
3320 		    "%s: scoped %s/%d on %s has no matching unscoped prefix\n",
3379 	struct sockaddr_in6 mask6, prefix;
3401 	 * Add the interface route associated with the prefix.  Before
3402 	 * installing the route, check if there's the same prefix on another
3403 	 * interface, and the prefix has already installed the interface route.
3448 		 * containing a prefix with the L bit set and the A bit clear,
3454 		    " to add route for a prefix(%s/%d) on %s\n",
3468 	prefix = pr->ndpr_prefix;
3494 	error = rtrequest_scoped(RTM_ADD, (struct sockaddr *)&prefix,
3511 		    " prefix (%s/%d) on %s, gw=%s, mask=%s, flags=%lx,"
3525 	 * TODO: If the prefix route exists, we should really find it and
3526 	 * refer the prefix to it; otherwise ndpr_rt is NULL.
3547 			 * At present, in order for the prefix to be eligible
3548 			 * as a proxying/proxied prefix, we require that the
3549 			 * prefix route entry be marked as a cloning route with
3568 	 * If this is an upstream prefix, find the downstream ones (if any)
3569 	 * and re-configure their prefix routes accordingly.  Otherwise,
3570 	 * this could be potentially be a downstream prefix, and so find the
3571 	 * upstream prefix, if any.
3601 	struct sockaddr_in6 sa6, mask6, prefix;
3628 	prefix = pr->ndpr_prefix;
3650 		 * is not enabled.  There might be the same prefix on another
3651 		 * interface, the prefix which could not be on-link just
3653 		 * nd6_prefix_onlink).  If there's one, try to make the prefix
3684 			    in6_are_prefix_equal(&prefix.sin6_addr,
3693 					    "recover a prefix %s/%d from %s "
3733 	 * If this was an upstream prefix, find the downstream ones and do
3734 	 * some cleanups.  If this was a downstream prefix, the prefix route
3791 		    "(prefix=%d ifid=%d)\n",
3809 	/* prefix */
3827 	/* new prefix mask. */
3921 	/* copy prefix mask */