bsd/netinet6/in6_src.c

114 #include <net/route.h>
555  * Given a source IPv6 address (and route, if available), determine the best
557  * ROF_SRCIF_SELECTED flag in the pcb-supplied route placeholder is done
578 	struct route_in6 *route = NULL;
652 			 * We do not have to check or get the route for
654 			 * the route and we have no interface to use,
673 			goto done; /* we do not need a route for multicast. */
689 	 * by the route.  For performance reasons, do this only if
690 	 * there is no route, or if the routing table has changed,
692 	 * route (for this PCB instance) before.
719 		 * If no scope is specified and the route is stale (pointing
723 		 * information from the route; the ULP may have looked up a
724 		 * correct route and we just need to verify it here and mark
770 	 *   1) There currently isn't any route, or,
771 	 *   2) The interface used by the route does not own that source
772 	 *	IPv6 address; in this case, the route will get blown away
828 			rtalloc_scoped((struct route *)ron, ifscope);
844 		route = ron;
848 		 * When cloning is required, try to allocate a route to the
854 				/* Keep the route locked */
864 	 * Use a cached route if it exists and is valid, else try to allocate
887 		/* No route yet, so try to acquire one */
895 			    &((struct route *)ro)->ro_dst, 0, 0, ifscope);
897 			rtalloc_scoped((struct route *)ro, ifscope);
919 	route = ro;
923 		boolean_t has_route = (route != NULL && route->ro_rt != NULL);
927 			RT_LOCK_ASSERT_HELD(route->ro_rt);
929 		 * If there is a non-loopback route with the wrong interface,
936 		    !(route->ro_rt->rt_flags & RTF_UP))) {
944 			    (route->ro_rt->rt_flags & (RTF_UP|RTF_PROXY)) ==
952 						    "(cached route cleared)\n",
963 				RT_UNLOCK(route->ro_rt);
964 				rtfree(route->ro_rt);
965 				route->ro_rt = NULL;
966 				route->ro_flags &= ~ROF_SRCIF_SELECTED;
969 				route = NULL;
979 			route->ro_flags |= ROF_SRCIF_SELECTED;
980 			route->ro_rt->generation_id = route_generation;
981 			RT_UNLOCK(route->ro_rt);
1008 		    (route != NULL && route->ro_rt != NULL &&
1009 		    route->ro_rt->rt_ifp->if_type == IFT_CELLULAR))) {
1010 			if (route != NULL && route->ro_rt != NULL) {
1011 				rtfree(route->ro_rt);
1012 				route->ro_rt = NULL;
1013 				route->ro_flags &= ~ROF_SRCIF_SELECTED;
1014 				route = NULL;
1021 	if (ifp == NULL && (route == NULL || route->ro_rt == NULL)) {
1023 		 * This can happen if the caller did not pass a cached route
1044 		if (retrt != NULL && route != NULL)
1045 			*retrt = route->ro_rt;	/* ro_rt may be NULL */
1083 	 * do not use a rejected or black hole route.
1087 	 * - install a rejected route for a scoped address prefix
1091 	 * - pick the outgoing interface from the route, and disambiguate the
1093 	 * - ip6_output() would try to get another route with the "new"