Example #1
0
/*
 * On last reference drop, mark the route as belong to us so that it can be
 * timed out.
 */
static void
in6_clsroute(struct radix_node *rn, struct radix_node_head *head)
{
	struct rtentry *rt = (struct rtentry *)rn;

	RT_LOCK_ASSERT(rt);

	if (!(rt->rt_flags & RTF_UP))
		return;		/* prophylactic measures */

	if ((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST)
		return;

	if ((rt->rt_flags & (RTF_WASCLONED | RTPRF_OURS)) != RTF_WASCLONED)
		return;

	/*
	 * As requested by David Greenman:
	 * If rtq_reallyold is 0, just delete the route without
	 * waiting for a timeout cycle to kill it.
	 */
	if (rtq_reallyold != 0) {
		rt->rt_flags |= RTPRF_OURS;
		rt->rt_rmx.rmx_expire = time_second + rtq_reallyold;
	} else {
		rtexpunge(rt);
	}
}
Example #2
0
/*
 * On last reference drop, mark the route as belong to us so that it can be
 * timed out.
 */
static void
in_clsroute(struct radix_node *rn, struct radix_node_head *head)
{
	struct rtentry *rt = (struct rtentry *)rn;

	RT_LOCK_ASSERT(rt);

	if (!(rt->rt_flags & RTF_UP))
		return;			/* prophylactic measures */

	if (rt->rt_flags & RTPRF_OURS)
		return;

	if (!(rt->rt_flags & RTF_DYNAMIC))
		return;

	/*
	 * If rtq_reallyold is 0, just delete the route without
	 * waiting for a timeout cycle to kill it.
	 */
	if (V_rtq_reallyold != 0) {
		rt->rt_flags |= RTPRF_OURS;
		rt->rt_rmx.rmx_expire = time_uptime + V_rtq_reallyold;
	} else {
		rtexpunge(rt);
	}
}
Example #3
0
/*
 * Remove incoming-label map (ilm).
 */
static void	
mpls_rn_clsroute(struct radix_node *rn, struct radix_node_head *rnh)
{
	struct rtentry *rt = (struct rtentry *)rn;
	
	KASSERT((rnh != NULL), ("radix_node_head{} not defined"));
	KASSERT((rt != NULL), ("ilm not defined"));
	
	RT_LOCK_ASSERT(rt);

	if ((rt->rt_flags & RTF_UP) 
		&& (rt->rt_refcnt < 1)) 
			rtexpunge(rt);
}
Example #4
0
/*
 * On last reference drop, mark the route as belong to us so that it can be
 * timed out.
 */
static void
in6_clsroute(struct radix_node *rn, struct radix_node_head *head)
{
	struct rtentry *rt = (struct rtentry *)rn;

	if (!(rt->rt_flags & RTF_UP))
		return;		/* prophylactic measures */

	if ((rt->rt_flags & (RTF_LLINFO | RTF_HOST)) != RTF_HOST)
		return;

	if ((rt->rt_flags & (RTF_WASCLONED | RTPRF_OURS))
	   != RTF_WASCLONED)
		return;

	/*
	 * As requested by David Greenman:
	 * If rtq_reallyold is 0, just delete the route without
	 * waiting for a timeout cycle to kill it.
	 */
	if (rtq_reallyold != 0) {
		rt->rt_flags |= RTPRF_OURS;
		rt->rt_rmx.rmx_expire = time_second + rtq_reallyold;
	} else {
#ifdef __FreeBSD__
		rtexpunge(rt);
#else
		struct rtentry *dummy;

		/*
		 * rtrequest() would recursively call rtfree() without the
		 * dummy entry argument, causing duplicated free.
		 */
		rtrequest(RTM_DELETE,
			  (struct sockaddr *)rt_key(rt),
			  rt->rt_gateway, rt_mask(rt),
			  rt->rt_flags, &dummy);
#endif
	}
}
Example #5
0
static int
in_ifadownkill(struct radix_node *rn, void *xap)
{
	struct in_ifadown_arg *ap = xap;
	struct rtentry *rt = (struct rtentry *)rn;

	RT_LOCK(rt);
	if (rt->rt_ifa == ap->ifa &&
	    (ap->del || !(rt->rt_flags & RTF_STATIC))) {
		/*
		 * We need to disable the automatic prune that happens
		 * in this case in rtrequest() because it will blow
		 * away the pointers that rn_walktree() needs in order
		 * continue our descent.  We will end up deleting all
		 * the routes that rtrequest() would have in any case,
		 * so that behavior is not needed there.
		 */
		rt->rt_flags &= ~RTF_CLONING;
		rtexpunge(rt);
	}
	RT_UNLOCK(rt);
	return 0;
}
Example #6
0
static int
in_ifadownkill(struct radix_node *rn, void *xap)
{
	struct in_ifadown_arg *ap = xap;
	struct rtentry *rt = (struct rtentry *)rn;

	RT_LOCK(rt);
	if (rt->rt_ifa == ap->ifa &&
	    (ap->del || !(rt->rt_flags & RTF_STATIC))) {
		/*
		 * Aquire a reference so that it can later be freed
		 * as the refcount would be 0 here in case of at least
		 * ap->del.
		 */
		RT_ADDREF(rt);
		/*
		 * Disconnect it from the tree and permit protocols
		 * to cleanup.
		 */
		rtexpunge(rt);
		/*
		 * At this point it is an rttrash node, and in case
		 * the above is the only reference we must free it.
		 * If we do not noone will have a pointer and the
		 * rtentry will be leaked forever.
		 * In case someone else holds a reference, we are
		 * fine as we only decrement the refcount. In that
		 * case if the other entity calls RT_REMREF, we
		 * will still be leaking but at least we tried.
		 */
		RTFREE_LOCKED(rt);
		return (0);
	}
	RT_UNLOCK(rt);
	return 0;
}
Example #7
0
/*
 * Do what we need to do when inserting a route.
 */
static struct radix_node *
in6_addroute(void *v_arg, void *n_arg, struct radix_node_head *head,
	    struct radix_node *treenodes)
{
	struct rtentry *rt = (struct rtentry *)treenodes;
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt);
	struct radix_node *ret;

	if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
		rt->rt_flags |= RTF_MULTICAST;

	/*
	 * A little bit of help for both IPv6 output and input:
	 *   For local addresses, we make sure that RTF_LOCAL is set,
	 *   with the thought that this might one day be used to speed up
	 *   ip_input().
	 *
	 * We also mark routes to multicast addresses as such, because
	 * it's easy to do and might be useful (but this is much more
	 * dubious since it's so easy to inspect the address).  (This
	 * is done above.)
	 *
	 * XXX
	 * should elaborate the code.
	 */
	if (rt->rt_flags & RTF_HOST) {
		if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr)
					->sin6_addr,
				       &sin6->sin6_addr)) {
			rt->rt_flags |= RTF_LOCAL;
		}
	}

	if (!rt->rt_rmx.rmx_mtu && rt->rt_ifp)
		rt->rt_rmx.rmx_mtu = IN6_LINKMTU(rt->rt_ifp);

	ret = rn_addroute(v_arg, n_arg, head, treenodes);
	if (ret == NULL && rt->rt_flags & RTF_HOST) {
		struct rtentry *rt2;
		/*
		 * We are trying to add a host route, but can't.
		 * Find out if it is because of an
		 * ARP entry and delete it if so.
		 */
		rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_CLONING);
		if (rt2) {
			if (rt2->rt_flags & RTF_LLINFO &&
				rt2->rt_flags & RTF_HOST &&
				rt2->rt_gateway &&
				rt2->rt_gateway->sa_family == AF_LINK) {
				rtexpunge(rt2);
				RTFREE_LOCKED(rt2);
				ret = rn_addroute(v_arg, n_arg, head,
					treenodes);
			} else
				RTFREE_LOCKED(rt2);
		}
	} else if (ret == NULL && rt->rt_flags & RTF_CLONING) {
		struct rtentry *rt2;
		/*
		 * We are trying to add a net route, but can't.
		 * The following case should be allowed, so we'll make a
		 * special check for this:
		 *	Two IPv6 addresses with the same prefix is assigned
		 *	to a single interrface.
		 *	# ifconfig if0 inet6 3ffe:0501::1 prefix 64 alias (*1)
		 *	# ifconfig if0 inet6 3ffe:0501::2 prefix 64 alias (*2)
		 *	In this case, (*1) and (*2) want to add the same
		 *	net route entry, 3ffe:0501:: -> if0.
		 *	This case should not raise an error.
		 */
		rt2 = rtalloc1((struct sockaddr *)sin6, 0, RTF_CLONING);
		if (rt2) {
			if ((rt2->rt_flags & (RTF_CLONING|RTF_HOST|RTF_GATEWAY))
					== RTF_CLONING
			 && rt2->rt_gateway
			 && rt2->rt_gateway->sa_family == AF_LINK
			 && rt2->rt_ifp == rt->rt_ifp) {
				ret = rt2->rt_nodes;
			}
			RTFREE_LOCKED(rt2);
		}
	}
	return ret;
}
Example #8
0
/*
 * Do what we need to do when inserting a route.
 */
static struct radix_node *
in_addroute(void *v_arg, void *n_arg, struct radix_node_head *head,
	    struct radix_node *treenodes)
{
	struct rtentry *rt = (struct rtentry *)treenodes;
	struct sockaddr_in *sin = (struct sockaddr_in *)rt_key(rt);
	struct radix_node *ret;

	/*
	 * A little bit of help for both IP output and input:
	 *   For host routes, we make sure that RTF_BROADCAST
	 *   is set for anything that looks like a broadcast address.
	 *   This way, we can avoid an expensive call to in_broadcast()
	 *   in ip_output() most of the time (because the route passed
	 *   to ip_output() is almost always a host route).
	 *
	 *   We also do the same for local addresses, with the thought
	 *   that this might one day be used to speed up ip_input().
	 *
	 * We also mark routes to multicast addresses as such, because
	 * it's easy to do and might be useful (but this is much more
	 * dubious since it's so easy to inspect the address).
	 */
	if (rt->rt_flags & RTF_HOST) {
		if (in_broadcast(sin->sin_addr, rt->rt_ifp)) {
			rt->rt_flags |= RTF_BROADCAST;
		} else if (satosin(rt->rt_ifa->ifa_addr)->sin_addr.s_addr ==
		    sin->sin_addr.s_addr) {
			rt->rt_flags |= RTF_LOCAL;
		}
	}
	if (IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
		rt->rt_flags |= RTF_MULTICAST;

	if (!rt->rt_rmx.rmx_mtu && rt->rt_ifp)
		rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu;

	ret = rn_addroute(v_arg, n_arg, head, treenodes);
	if (ret == NULL && rt->rt_flags & RTF_HOST) {
		struct rtentry *rt2;
		/*
		 * We are trying to add a host route, but can't.
		 * Find out if it is because of an
		 * ARP entry and delete it if so.
		 */
		rt2 = rtalloc1((struct sockaddr *)sin, 0, RTF_CLONING);
		if (rt2) {
			if (rt2->rt_flags & RTF_LLINFO &&
			    rt2->rt_flags & RTF_HOST &&
			    rt2->rt_gateway &&
			    rt2->rt_gateway->sa_family == AF_LINK) {
				rtexpunge(rt2);
				RTFREE_LOCKED(rt2);
				ret = rn_addroute(v_arg, n_arg, head,
						  treenodes);
			} else
				RTFREE_LOCKED(rt2);
			}
	}

	return ret;
}