842 lines
22 KiB
C
842 lines
22 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)route.c 8.3.1.1 (Berkeley) 2/23/95
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* $FreeBSD$
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*/
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/************************************************************************
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* Note: In this file a 'fib' is a "forwarding information base" *
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* Which is the new name for an in kernel routing (next hop) table. *
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***********************************************************************/
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_mrouting.h"
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#include "opt_route.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/sysproto.h>
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#include <sys/proc.h>
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#include <sys/devctl.h>
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#include <sys/domain.h>
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#include <sys/eventhandler.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/rmlock.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_dl.h>
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#include <net/route.h>
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#include <net/route/route_ctl.h>
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#include <net/route/route_var.h>
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#include <net/route/nhop.h>
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#include <net/vnet.h>
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#include <netinet/in.h>
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#include <netinet/ip_mroute.h>
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#include <netinet6/in6_var.h>
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VNET_PCPUSTAT_DEFINE(struct rtstat, rtstat);
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VNET_PCPUSTAT_SYSINIT(rtstat);
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#ifdef VIMAGE
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VNET_PCPUSTAT_SYSUNINIT(rtstat);
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#endif
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EVENTHANDLER_LIST_DEFINE(rt_addrmsg);
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static int rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *,
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void *arg);
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static int rt_exportinfo(struct rtentry *rt, struct nhop_object *nh,
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struct rt_addrinfo *info, int flags);
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/*
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* route initialization must occur before ip6_init2(), which happenas at
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* SI_ORDER_MIDDLE.
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*/
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static void
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route_init(void)
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{
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nhops_init();
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}
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SYSINIT(route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, route_init, NULL);
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struct rib_head *
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rt_table_init(int offset, int family, u_int fibnum)
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{
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struct rib_head *rh;
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rh = malloc(sizeof(struct rib_head), M_RTABLE, M_WAITOK | M_ZERO);
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/* TODO: These details should be hidded inside radix.c */
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/* Init masks tree */
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rn_inithead_internal(&rh->head, rh->rnh_nodes, offset);
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rn_inithead_internal(&rh->rmhead.head, rh->rmhead.mask_nodes, 0);
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rh->head.rnh_masks = &rh->rmhead;
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/* Save metadata associated with this routing table. */
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rh->rib_family = family;
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rh->rib_fibnum = fibnum;
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#ifdef VIMAGE
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rh->rib_vnet = curvnet;
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#endif
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tmproutes_init(rh);
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/* Init locks */
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RIB_LOCK_INIT(rh);
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nhops_init_rib(rh);
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/* Init subscription system */
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rib_init_subscriptions(rh);
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/* Finally, set base callbacks */
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rh->rnh_addaddr = rn_addroute;
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rh->rnh_deladdr = rn_delete;
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rh->rnh_matchaddr = rn_match;
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rh->rnh_lookup = rn_lookup;
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rh->rnh_walktree = rn_walktree;
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rh->rnh_walktree_from = rn_walktree_from;
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return (rh);
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}
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static int
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rt_freeentry(struct radix_node *rn, void *arg)
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{
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struct radix_head * const rnh = arg;
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struct radix_node *x;
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x = (struct radix_node *)rn_delete(rn + 2, NULL, rnh);
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if (x != NULL)
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R_Free(x);
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return (0);
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}
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void
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rt_table_destroy(struct rib_head *rh)
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{
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RIB_WLOCK(rh);
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rh->rib_dying = true;
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RIB_WUNLOCK(rh);
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#ifdef FIB_ALGO
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fib_destroy_rib(rh);
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#endif
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tmproutes_destroy(rh);
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rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head);
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nhops_destroy_rib(rh);
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rib_destroy_subscriptions(rh);
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/* Assume table is already empty */
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RIB_LOCK_DESTROY(rh);
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free(rh, M_RTABLE);
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}
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/*
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* Adds a temporal redirect entry to the routing table.
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* @fibnum: fib number
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* @dst: destination to install redirect to
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* @gateway: gateway to go via
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* @author: sockaddr of originating router, can be NULL
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* @ifp: interface to use for the redirected route
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* @flags: set of flags to add. Allowed: RTF_GATEWAY
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* @lifetime_sec: time in seconds to expire this redirect.
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*
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* Retuns 0 on success, errno otherwise.
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*/
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int
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rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway,
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struct sockaddr *author, struct ifnet *ifp, int flags, int lifetime_sec)
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{
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struct rib_cmd_info rc;
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int error;
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struct rt_addrinfo info;
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struct rt_metrics rti_rmx;
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struct ifaddr *ifa;
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NET_EPOCH_ASSERT();
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if (rt_tables_get_rnh(fibnum, dst->sa_family) == NULL)
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return (EAFNOSUPPORT);
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/* Verify the allowed flag mask. */
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KASSERT(((flags & ~(RTF_GATEWAY)) == 0),
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("invalid redirect flags: %x", flags));
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flags |= RTF_HOST | RTF_DYNAMIC;
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/* Get the best ifa for the given interface and gateway. */
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if ((ifa = ifaof_ifpforaddr(gateway, ifp)) == NULL)
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return (ENETUNREACH);
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bzero(&info, sizeof(info));
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info.rti_info[RTAX_DST] = dst;
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info.rti_info[RTAX_GATEWAY] = gateway;
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info.rti_ifa = ifa;
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info.rti_ifp = ifp;
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info.rti_flags = flags;
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/* Setup route metrics to define expire time. */
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bzero(&rti_rmx, sizeof(rti_rmx));
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/* Set expire time as absolute. */
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rti_rmx.rmx_expire = lifetime_sec + time_second;
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info.rti_mflags |= RTV_EXPIRE;
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info.rti_rmx = &rti_rmx;
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error = rib_action(fibnum, RTM_ADD, &info, &rc);
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if (error != 0) {
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/* TODO: add per-fib redirect stats. */
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return (error);
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}
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RTSTAT_INC(rts_dynamic);
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/* Send notification of a route addition to userland. */
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bzero(&info, sizeof(info));
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info.rti_info[RTAX_DST] = dst;
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info.rti_info[RTAX_GATEWAY] = gateway;
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info.rti_info[RTAX_AUTHOR] = author;
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rt_missmsg_fib(RTM_REDIRECT, &info, flags | RTF_UP, error, fibnum);
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return (0);
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}
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/*
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* Routing table ioctl interface.
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*/
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int
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rtioctl_fib(u_long req, caddr_t data, u_int fibnum)
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{
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/*
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* If more ioctl commands are added here, make sure the proper
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* super-user checks are being performed because it is possible for
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* prison-root to make it this far if raw sockets have been enabled
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* in jails.
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*/
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#ifdef INET
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/* Multicast goop, grrr... */
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return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP;
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#else /* INET */
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return ENXIO;
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#endif /* INET */
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}
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struct ifaddr *
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ifa_ifwithroute(int flags, const struct sockaddr *dst,
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const struct sockaddr *gateway, u_int fibnum)
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{
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struct ifaddr *ifa;
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NET_EPOCH_ASSERT();
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if ((flags & RTF_GATEWAY) == 0) {
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/*
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* If we are adding a route to an interface,
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* and the interface is a pt to pt link
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* we should search for the destination
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* as our clue to the interface. Otherwise
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* we can use the local address.
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*/
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ifa = NULL;
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if (flags & RTF_HOST)
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ifa = ifa_ifwithdstaddr(dst, fibnum);
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if (ifa == NULL)
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ifa = ifa_ifwithaddr(gateway);
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} else {
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/*
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* If we are adding a route to a remote net
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* or host, the gateway may still be on the
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* other end of a pt to pt link.
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*/
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ifa = ifa_ifwithdstaddr(gateway, fibnum);
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}
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if (ifa == NULL)
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ifa = ifa_ifwithnet(gateway, 0, fibnum);
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if (ifa == NULL) {
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struct nhop_object *nh;
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nh = rib_lookup(fibnum, gateway, NHR_NONE, 0);
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/*
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* dismiss a gateway that is reachable only
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* through the default router
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*/
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if ((nh == NULL) || (nh->nh_flags & NHF_DEFAULT))
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return (NULL);
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ifa = nh->nh_ifa;
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}
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if (ifa->ifa_addr->sa_family != dst->sa_family) {
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struct ifaddr *oifa = ifa;
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ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp);
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if (ifa == NULL)
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ifa = oifa;
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}
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return (ifa);
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}
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/*
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* Copy most of @rt data into @info.
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*
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* If @flags contains NHR_COPY, copies dst,netmask and gw to the
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* pointers specified by @info structure. Assume such pointers
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* are zeroed sockaddr-like structures with sa_len field initialized
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* to reflect size of the provided buffer. if no NHR_COPY is specified,
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* point dst,netmask and gw @info fields to appropriate @rt values.
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*
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* if @flags contains NHR_REF, do refcouting on rt_ifp and rt_ifa.
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*
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* Returns 0 on success.
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*/
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static int
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rt_exportinfo(struct rtentry *rt, struct nhop_object *nh,
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struct rt_addrinfo *info, int flags)
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{
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struct rt_metrics *rmx;
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struct sockaddr *src, *dst;
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int sa_len;
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if (flags & NHR_COPY) {
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/* Copy destination if dst is non-zero */
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src = rt_key(rt);
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dst = info->rti_info[RTAX_DST];
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sa_len = src->sa_len;
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if (dst != NULL) {
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if (src->sa_len > dst->sa_len)
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return (ENOMEM);
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memcpy(dst, src, src->sa_len);
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info->rti_addrs |= RTA_DST;
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}
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/* Copy mask if set && dst is non-zero */
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src = rt_mask(rt);
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dst = info->rti_info[RTAX_NETMASK];
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if (src != NULL && dst != NULL) {
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/*
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* Radix stores different value in sa_len,
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* assume rt_mask() to have the same length
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* as rt_key()
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*/
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if (sa_len > dst->sa_len)
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return (ENOMEM);
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memcpy(dst, src, src->sa_len);
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info->rti_addrs |= RTA_NETMASK;
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}
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/* Copy gateway is set && dst is non-zero */
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src = &nh->gw_sa;
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dst = info->rti_info[RTAX_GATEWAY];
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if ((nhop_get_rtflags(nh) & RTF_GATEWAY) &&
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src != NULL && dst != NULL) {
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if (src->sa_len > dst->sa_len)
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return (ENOMEM);
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memcpy(dst, src, src->sa_len);
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info->rti_addrs |= RTA_GATEWAY;
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}
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} else {
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info->rti_info[RTAX_DST] = rt_key(rt);
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info->rti_addrs |= RTA_DST;
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if (rt_mask(rt) != NULL) {
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info->rti_info[RTAX_NETMASK] = rt_mask(rt);
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info->rti_addrs |= RTA_NETMASK;
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}
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if (nhop_get_rtflags(nh) & RTF_GATEWAY) {
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info->rti_info[RTAX_GATEWAY] = &nh->gw_sa;
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info->rti_addrs |= RTA_GATEWAY;
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}
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}
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rmx = info->rti_rmx;
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if (rmx != NULL) {
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info->rti_mflags |= RTV_MTU;
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rmx->rmx_mtu = nh->nh_mtu;
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}
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info->rti_flags = rt->rte_flags | nhop_get_rtflags(nh);
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info->rti_ifp = nh->nh_ifp;
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info->rti_ifa = nh->nh_ifa;
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if (flags & NHR_REF) {
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if_ref(info->rti_ifp);
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ifa_ref(info->rti_ifa);
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}
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return (0);
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}
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/*
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* Lookups up route entry for @dst in RIB database for fib @fibnum.
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* Exports entry data to @info using rt_exportinfo().
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*
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* If @flags contains NHR_REF, refcouting is performed on rt_ifp and rt_ifa.
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* All references can be released later by calling rib_free_info().
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*
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* Returns 0 on success.
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* Returns ENOENT for lookup failure, ENOMEM for export failure.
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*/
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int
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rib_lookup_info(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags,
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uint32_t flowid, struct rt_addrinfo *info)
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{
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RIB_RLOCK_TRACKER;
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struct rib_head *rh;
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struct radix_node *rn;
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struct rtentry *rt;
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struct nhop_object *nh;
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int error;
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KASSERT((fibnum < rt_numfibs), ("rib_lookup_rte: bad fibnum"));
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rh = rt_tables_get_rnh(fibnum, dst->sa_family);
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if (rh == NULL)
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return (ENOENT);
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RIB_RLOCK(rh);
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rn = rh->rnh_matchaddr(__DECONST(void *, dst), &rh->head);
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if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
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rt = RNTORT(rn);
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nh = nhop_select(rt->rt_nhop, flowid);
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/* Ensure route & ifp is UP */
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if (RT_LINK_IS_UP(nh->nh_ifp)) {
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flags = (flags & NHR_REF) | NHR_COPY;
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error = rt_exportinfo(rt, nh, info, flags);
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RIB_RUNLOCK(rh);
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return (error);
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}
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}
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RIB_RUNLOCK(rh);
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return (ENOENT);
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}
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/*
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* Releases all references acquired by rib_lookup_info() when
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* called with NHR_REF flags.
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*/
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void
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rib_free_info(struct rt_addrinfo *info)
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{
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ifa_free(info->rti_ifa);
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if_rele(info->rti_ifp);
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}
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/*
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* Delete Routes for a Network Interface
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*
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* Called for each routing entry via the rnh->rnh_walktree() call above
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* to delete all route entries referencing a detaching network interface.
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*
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* Arguments:
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* rt pointer to rtentry
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* nh pointer to nhop
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* arg argument passed to rnh->rnh_walktree() - detaching interface
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*
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* Returns:
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* 0 successful
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* errno failed - reason indicated
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*/
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static int
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rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg)
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{
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struct ifnet *ifp = arg;
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if (nh->nh_ifp != ifp)
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return (0);
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/*
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* Protect (sorta) against walktree recursion problems
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* with cloned routes
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*/
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if ((rt->rte_flags & RTF_UP) == 0)
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return (0);
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return (1);
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}
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void
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rt_flushifroutes(struct ifnet *ifp)
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{
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rib_foreach_table_walk_del(AF_UNSPEC, rt_ifdelroute, ifp);
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}
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/*
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* Tries to extract interface from RTAX_IFP passed in rt_addrinfo.
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* Interface can be specified ether as interface index (sdl_index) or
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* the interface name (sdl_data).
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*
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* Returns found ifp or NULL
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*/
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static struct ifnet *
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info_get_ifp(struct rt_addrinfo *info)
|
|
{
|
|
const struct sockaddr_dl *sdl;
|
|
|
|
sdl = (const struct sockaddr_dl *)info->rti_info[RTAX_IFP];
|
|
if (sdl->sdl_family != AF_LINK)
|
|
return (NULL);
|
|
|
|
if (sdl->sdl_index != 0)
|
|
return (ifnet_byindex(sdl->sdl_index));
|
|
if (sdl->sdl_nlen > 0) {
|
|
char if_name[IF_NAMESIZE];
|
|
if (sdl->sdl_nlen + offsetof(struct sockaddr_dl, sdl_data) > sdl->sdl_len)
|
|
return (NULL);
|
|
if (sdl->sdl_nlen >= IF_NAMESIZE)
|
|
return (NULL);
|
|
bzero(if_name, sizeof(if_name));
|
|
memcpy(if_name, sdl->sdl_data, sdl->sdl_nlen);
|
|
return (ifunit(if_name));
|
|
}
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Calculates proper ifa/ifp for the cases when gateway AF is different
|
|
* from dst AF.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
__noinline static int
|
|
rt_getifa_family(struct rt_addrinfo *info, uint32_t fibnum)
|
|
{
|
|
if (info->rti_ifp == NULL) {
|
|
struct ifaddr *ifa = NULL;
|
|
/*
|
|
* No transmit interface specified. Guess it by checking gw sa.
|
|
*/
|
|
const struct sockaddr *gw = info->rti_info[RTAX_GATEWAY];
|
|
ifa = ifa_ifwithroute(RTF_GATEWAY, gw, gw, fibnum);
|
|
if (ifa == NULL)
|
|
return (ENETUNREACH);
|
|
info->rti_ifp = ifa->ifa_ifp;
|
|
}
|
|
|
|
/* Prefer address from outgoing interface */
|
|
info->rti_ifa = ifaof_ifpforaddr(info->rti_info[RTAX_DST], info->rti_ifp);
|
|
#ifdef INET
|
|
if (info->rti_ifa == NULL) {
|
|
/* Use first found IPv4 address */
|
|
bool loopback_ok = info->rti_ifp->if_flags & IFF_LOOPBACK;
|
|
info->rti_ifa = (struct ifaddr *)in_findlocal(fibnum, loopback_ok);
|
|
}
|
|
#endif
|
|
if (info->rti_ifa == NULL)
|
|
return (ENETUNREACH);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Fills in rti_ifp and rti_ifa for the provided fib.
|
|
*
|
|
* Assume basic consistency checks are executed by callers:
|
|
* RTAX_DST exists, if RTF_GATEWAY is set, RTAX_GATEWAY exists as well.
|
|
*/
|
|
int
|
|
rt_getifa_fib(struct rt_addrinfo *info, u_int fibnum)
|
|
{
|
|
const struct sockaddr *dst, *gateway, *ifaaddr;
|
|
int error, flags;
|
|
|
|
dst = info->rti_info[RTAX_DST];
|
|
gateway = info->rti_info[RTAX_GATEWAY];
|
|
ifaaddr = info->rti_info[RTAX_IFA];
|
|
flags = info->rti_flags;
|
|
|
|
/*
|
|
* ifp may be specified by sockaddr_dl
|
|
* when protocol address is ambiguous.
|
|
*/
|
|
error = 0;
|
|
|
|
/* If we have interface specified by RTAX_IFP address, try to use it */
|
|
if ((info->rti_ifp == NULL) && (info->rti_info[RTAX_IFP] != NULL))
|
|
info->rti_ifp = info_get_ifp(info);
|
|
/*
|
|
* If we have source address specified, try to find it
|
|
* TODO: avoid enumerating all ifas on all interfaces.
|
|
*/
|
|
if (info->rti_ifa == NULL && ifaaddr != NULL)
|
|
info->rti_ifa = ifa_ifwithaddr(ifaaddr);
|
|
if ((info->rti_ifa == NULL) && ((info->rti_flags & RTF_GATEWAY) != 0) &&
|
|
(gateway->sa_family != dst->sa_family))
|
|
return (rt_getifa_family(info, fibnum));
|
|
if (info->rti_ifa == NULL) {
|
|
const struct sockaddr *sa;
|
|
|
|
/*
|
|
* Most common use case for the userland-supplied routes.
|
|
*
|
|
* Choose sockaddr to select ifa.
|
|
* -- if ifp is set --
|
|
* Order of preference:
|
|
* 1) IFA address
|
|
* 2) gateway address
|
|
* Note: for interface routes link-level gateway address
|
|
* is specified to indicate the interface index without
|
|
* specifying RTF_GATEWAY. In this case, ignore gateway
|
|
* Note: gateway AF may be different from dst AF. In this case,
|
|
* ignore gateway
|
|
* 3) final destination.
|
|
* 4) if all of these fails, try to get at least link-level ifa.
|
|
* -- else --
|
|
* try to lookup gateway or dst in the routing table to get ifa
|
|
*/
|
|
if (info->rti_info[RTAX_IFA] != NULL)
|
|
sa = info->rti_info[RTAX_IFA];
|
|
else if ((info->rti_flags & RTF_GATEWAY) != 0 &&
|
|
gateway->sa_family == dst->sa_family)
|
|
sa = gateway;
|
|
else
|
|
sa = dst;
|
|
if (info->rti_ifp != NULL) {
|
|
info->rti_ifa = ifaof_ifpforaddr(sa, info->rti_ifp);
|
|
/* Case 4 */
|
|
if (info->rti_ifa == NULL && gateway != NULL)
|
|
info->rti_ifa = ifaof_ifpforaddr(gateway, info->rti_ifp);
|
|
} else if (dst != NULL && gateway != NULL)
|
|
info->rti_ifa = ifa_ifwithroute(flags, dst, gateway,
|
|
fibnum);
|
|
else if (sa != NULL)
|
|
info->rti_ifa = ifa_ifwithroute(flags, sa, sa,
|
|
fibnum);
|
|
}
|
|
if (info->rti_ifa != NULL) {
|
|
if (info->rti_ifp == NULL)
|
|
info->rti_ifp = info->rti_ifa->ifa_ifp;
|
|
} else
|
|
error = ENETUNREACH;
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
rt_updatemtu(struct ifnet *ifp)
|
|
{
|
|
struct rib_head *rnh;
|
|
int mtu;
|
|
int i, j;
|
|
|
|
/*
|
|
* Try to update rt_mtu for all routes using this interface
|
|
* Unfortunately the only way to do this is to traverse all
|
|
* routing tables in all fibs/domains.
|
|
*/
|
|
for (i = 1; i <= AF_MAX; i++) {
|
|
mtu = if_getmtu_family(ifp, i);
|
|
for (j = 0; j < rt_numfibs; j++) {
|
|
rnh = rt_tables_get_rnh(j, i);
|
|
if (rnh == NULL)
|
|
continue;
|
|
nhops_update_ifmtu(rnh, ifp, mtu);
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
int p_sockaddr(char *buf, int buflen, struct sockaddr *s);
|
|
int rt_print(char *buf, int buflen, struct rtentry *rt);
|
|
|
|
int
|
|
p_sockaddr(char *buf, int buflen, struct sockaddr *s)
|
|
{
|
|
void *paddr = NULL;
|
|
|
|
switch (s->sa_family) {
|
|
case AF_INET:
|
|
paddr = &((struct sockaddr_in *)s)->sin_addr;
|
|
break;
|
|
case AF_INET6:
|
|
paddr = &((struct sockaddr_in6 *)s)->sin6_addr;
|
|
break;
|
|
}
|
|
|
|
if (paddr == NULL)
|
|
return (0);
|
|
|
|
if (inet_ntop(s->sa_family, paddr, buf, buflen) == NULL)
|
|
return (0);
|
|
|
|
return (strlen(buf));
|
|
}
|
|
|
|
int
|
|
rt_print(char *buf, int buflen, struct rtentry *rt)
|
|
{
|
|
struct sockaddr *addr, *mask;
|
|
int i = 0;
|
|
|
|
addr = rt_key(rt);
|
|
mask = rt_mask(rt);
|
|
|
|
i = p_sockaddr(buf, buflen, addr);
|
|
if (!(rt->rt_flags & RTF_HOST)) {
|
|
buf[i++] = '/';
|
|
i += p_sockaddr(buf + i, buflen - i, mask);
|
|
}
|
|
|
|
if (rt->rt_flags & RTF_GATEWAY) {
|
|
buf[i++] = '>';
|
|
i += p_sockaddr(buf + i, buflen - i, &rt->rt_nhop->gw_sa);
|
|
}
|
|
|
|
return (i);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
rt_maskedcopy(struct sockaddr *src, struct sockaddr *dst, struct sockaddr *netmask)
|
|
{
|
|
u_char *cp1 = (u_char *)src;
|
|
u_char *cp2 = (u_char *)dst;
|
|
u_char *cp3 = (u_char *)netmask;
|
|
u_char *cplim = cp2 + *cp3;
|
|
u_char *cplim2 = cp2 + *cp1;
|
|
|
|
*cp2++ = *cp1++; *cp2++ = *cp1++; /* copies sa_len & sa_family */
|
|
cp3 += 2;
|
|
if (cplim > cplim2)
|
|
cplim = cplim2;
|
|
while (cp2 < cplim)
|
|
*cp2++ = *cp1++ & *cp3++;
|
|
if (cp2 < cplim2)
|
|
bzero((caddr_t)cp2, (unsigned)(cplim2 - cp2));
|
|
}
|
|
|
|
/*
|
|
* Announce interface address arrival/withdraw
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_addrmsg(int cmd, struct ifaddr *ifa, int fibnum)
|
|
{
|
|
#if defined(INET) || defined(INET6)
|
|
struct sockaddr *sa = ifa->ifa_addr;
|
|
struct ifnet *ifp = ifa->ifa_ifp;
|
|
#endif
|
|
|
|
KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
|
|
("unexpected cmd %d", cmd));
|
|
KASSERT((fibnum >= 0 && fibnum < rt_numfibs),
|
|
("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
|
|
|
|
EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd);
|
|
|
|
#ifdef INET
|
|
if (sa->sa_family == AF_INET) {
|
|
char addrstr[INET_ADDRSTRLEN];
|
|
char strbuf[INET_ADDRSTRLEN + 12];
|
|
|
|
inet_ntoa_r(((struct sockaddr_in *)sa)->sin_addr, addrstr);
|
|
snprintf(strbuf, sizeof(strbuf), "address=%s", addrstr);
|
|
devctl_notify("IFNET", ifp->if_xname,
|
|
(cmd == RTM_ADD) ? "ADDR_ADD" : "ADDR_DEL", strbuf);
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (sa->sa_family == AF_INET6) {
|
|
char addrstr[INET6_ADDRSTRLEN];
|
|
char strbuf[INET6_ADDRSTRLEN + 12];
|
|
|
|
ip6_sprintf(addrstr, IFA_IN6(ifa));
|
|
snprintf(strbuf, sizeof(strbuf), "address=%s", addrstr);
|
|
devctl_notify("IFNET", ifp->if_xname,
|
|
(cmd == RTM_ADD) ? "ADDR_ADD" : "ADDR_DEL", strbuf);
|
|
}
|
|
#endif
|
|
|
|
if (V_rt_add_addr_allfibs)
|
|
fibnum = RT_ALL_FIBS;
|
|
return (rtsock_addrmsg(cmd, ifa, fibnum));
|
|
}
|
|
|
|
/*
|
|
* Announce kernel-originated route addition/removal to rtsock based on @rt data.
|
|
* cmd: RTM_ cmd
|
|
* @rt: valid rtentry
|
|
* @nh: nhop object to announce
|
|
* @fibnum: fib id or RT_ALL_FIBS
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_routemsg(int cmd, struct rtentry *rt, struct nhop_object *nh,
|
|
int fibnum)
|
|
{
|
|
|
|
KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
|
|
("unexpected cmd %d", cmd));
|
|
|
|
KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
|
|
("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
|
|
|
|
KASSERT(rt_key(rt) != NULL, (":%s: rt_key must be supplied", __func__));
|
|
|
|
return (rtsock_routemsg(cmd, rt, nh, fibnum));
|
|
}
|
|
|
|
/*
|
|
* Announce kernel-originated route addition/removal to rtsock based on @rt data.
|
|
* cmd: RTM_ cmd
|
|
* @info: addrinfo structure with valid data.
|
|
* @fibnum: fib id or RT_ALL_FIBS
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_routemsg_info(int cmd, struct rt_addrinfo *info, int fibnum)
|
|
{
|
|
|
|
KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE || cmd == RTM_CHANGE,
|
|
("unexpected cmd %d", cmd));
|
|
|
|
KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
|
|
("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
|
|
|
|
KASSERT(info->rti_info[RTAX_DST] != NULL, (":%s: RTAX_DST must be supplied", __func__));
|
|
|
|
return (rtsock_routemsg_info(cmd, info, fibnum));
|
|
}
|