69104ebe0f
The bug was introduced by me in r353480. Reported by: Michael Butler MFC after: 3 days
2287 lines
55 KiB
C
2287 lines
55 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_mpath.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/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_var.h>
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#include <net/vnet.h>
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#ifdef RADIX_MPATH
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#include <net/radix_mpath.h>
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#endif
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#include <netinet/in.h>
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#include <netinet/ip_mroute.h>
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#include <vm/uma.h>
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#define RT_MAXFIBS UINT16_MAX
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/* Kernel config default option. */
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#ifdef ROUTETABLES
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#if ROUTETABLES <= 0
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#error "ROUTETABLES defined too low"
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#endif
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#if ROUTETABLES > RT_MAXFIBS
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#error "ROUTETABLES defined too big"
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#endif
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#define RT_NUMFIBS ROUTETABLES
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#endif /* ROUTETABLES */
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/* Initialize to default if not otherwise set. */
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#ifndef RT_NUMFIBS
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#define RT_NUMFIBS 1
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#endif
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/* This is read-only.. */
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u_int rt_numfibs = RT_NUMFIBS;
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SYSCTL_UINT(_net, OID_AUTO, fibs, CTLFLAG_RDTUN, &rt_numfibs, 0, "");
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/*
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* By default add routes to all fibs for new interfaces.
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* Once this is set to 0 then only allocate routes on interface
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* changes for the FIB of the caller when adding a new set of addresses
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* to an interface. XXX this is a shotgun aproach to a problem that needs
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* a more fine grained solution.. that will come.
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* XXX also has the problems getting the FIB from curthread which will not
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* always work given the fib can be overridden and prefixes can be added
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* from the network stack context.
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*/
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VNET_DEFINE(u_int, rt_add_addr_allfibs) = 1;
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SYSCTL_UINT(_net, OID_AUTO, add_addr_allfibs, CTLFLAG_RWTUN | CTLFLAG_VNET,
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&VNET_NAME(rt_add_addr_allfibs), 0, "");
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VNET_DEFINE(struct rtstat, rtstat);
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#define V_rtstat VNET(rtstat)
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VNET_DEFINE(struct rib_head *, rt_tables);
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#define V_rt_tables VNET(rt_tables)
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VNET_DEFINE(int, rttrash); /* routes not in table but not freed */
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#define V_rttrash VNET(rttrash)
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/*
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* Convert a 'struct radix_node *' to a 'struct rtentry *'.
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* The operation can be done safely (in this code) because a
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* 'struct rtentry' starts with two 'struct radix_node''s, the first
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* one representing leaf nodes in the routing tree, which is
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* what the code in radix.c passes us as a 'struct radix_node'.
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*
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* But because there are a lot of assumptions in this conversion,
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* do not cast explicitly, but always use the macro below.
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*/
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#define RNTORT(p) ((struct rtentry *)(p))
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VNET_DEFINE_STATIC(uma_zone_t, rtzone); /* Routing table UMA zone. */
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#define V_rtzone VNET(rtzone)
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EVENTHANDLER_LIST_DEFINE(rt_addrmsg);
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static int rtrequest1_fib_change(struct rib_head *, struct rt_addrinfo *,
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struct rtentry **, u_int);
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static void rt_setmetrics(const struct rt_addrinfo *, struct rtentry *);
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static int rt_ifdelroute(const struct rtentry *rt, void *arg);
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static struct rtentry *rt_unlinkrte(struct rib_head *rnh,
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struct rt_addrinfo *info, int *perror);
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static void rt_notifydelete(struct rtentry *rt, struct rt_addrinfo *info);
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#ifdef RADIX_MPATH
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static struct radix_node *rt_mpath_unlink(struct rib_head *rnh,
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struct rt_addrinfo *info, struct rtentry *rto, int *perror);
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#endif
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static int rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info,
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int flags);
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struct if_mtuinfo
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{
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struct ifnet *ifp;
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int mtu;
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};
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static int if_updatemtu_cb(struct radix_node *, void *);
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/*
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* handler for net.my_fibnum
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*/
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static int
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sysctl_my_fibnum(SYSCTL_HANDLER_ARGS)
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{
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int fibnum;
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int error;
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fibnum = curthread->td_proc->p_fibnum;
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error = sysctl_handle_int(oidp, &fibnum, 0, req);
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return (error);
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}
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SYSCTL_PROC(_net, OID_AUTO, my_fibnum, CTLTYPE_INT|CTLFLAG_RD,
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NULL, 0, &sysctl_my_fibnum, "I", "default FIB of caller");
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static __inline struct rib_head **
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rt_tables_get_rnh_ptr(int table, int fam)
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{
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struct rib_head **rnh;
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KASSERT(table >= 0 && table < rt_numfibs, ("%s: table out of bounds.",
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__func__));
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KASSERT(fam >= 0 && fam < (AF_MAX+1), ("%s: fam out of bounds.",
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__func__));
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/* rnh is [fib=0][af=0]. */
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rnh = (struct rib_head **)V_rt_tables;
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/* Get the offset to the requested table and fam. */
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rnh += table * (AF_MAX+1) + fam;
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return (rnh);
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}
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struct rib_head *
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rt_tables_get_rnh(int table, int fam)
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{
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return (*rt_tables_get_rnh_ptr(table, fam));
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}
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u_int
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rt_tables_get_gen(int table, int fam)
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{
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struct rib_head *rnh;
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rnh = *rt_tables_get_rnh_ptr(table, fam);
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KASSERT(rnh != NULL, ("%s: NULL rib_head pointer table %d fam %d",
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__func__, table, fam));
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return (rnh->rnh_gen);
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}
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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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/* whack the tunable ints into line. */
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if (rt_numfibs > RT_MAXFIBS)
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rt_numfibs = RT_MAXFIBS;
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if (rt_numfibs == 0)
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rt_numfibs = 1;
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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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static int
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rtentry_zinit(void *mem, int size, int how)
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{
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struct rtentry *rt = mem;
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rt->rt_pksent = counter_u64_alloc(how);
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if (rt->rt_pksent == NULL)
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return (ENOMEM);
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RT_LOCK_INIT(rt);
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return (0);
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}
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static void
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rtentry_zfini(void *mem, int size)
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{
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struct rtentry *rt = mem;
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RT_LOCK_DESTROY(rt);
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counter_u64_free(rt->rt_pksent);
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}
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static int
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rtentry_ctor(void *mem, int size, void *arg, int how)
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{
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struct rtentry *rt = mem;
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bzero(rt, offsetof(struct rtentry, rt_endzero));
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counter_u64_zero(rt->rt_pksent);
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rt->rt_chain = NULL;
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return (0);
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}
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static void
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rtentry_dtor(void *mem, int size, void *arg)
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{
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struct rtentry *rt = mem;
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RT_UNLOCK_COND(rt);
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}
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static void
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vnet_route_init(const void *unused __unused)
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{
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struct domain *dom;
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struct rib_head **rnh;
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int table;
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int fam;
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V_rt_tables = malloc(rt_numfibs * (AF_MAX+1) *
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sizeof(struct rib_head *), M_RTABLE, M_WAITOK|M_ZERO);
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V_rtzone = uma_zcreate("rtentry", sizeof(struct rtentry),
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rtentry_ctor, rtentry_dtor,
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rtentry_zinit, rtentry_zfini, UMA_ALIGN_PTR, 0);
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for (dom = domains; dom; dom = dom->dom_next) {
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if (dom->dom_rtattach == NULL)
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continue;
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for (table = 0; table < rt_numfibs; table++) {
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fam = dom->dom_family;
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if (table != 0 && fam != AF_INET6 && fam != AF_INET)
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break;
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rnh = rt_tables_get_rnh_ptr(table, fam);
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if (rnh == NULL)
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panic("%s: rnh NULL", __func__);
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dom->dom_rtattach((void **)rnh, 0);
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}
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}
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}
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VNET_SYSINIT(vnet_route_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_FOURTH,
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vnet_route_init, 0);
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#ifdef VIMAGE
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static void
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vnet_route_uninit(const void *unused __unused)
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{
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int table;
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int fam;
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struct domain *dom;
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struct rib_head **rnh;
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for (dom = domains; dom; dom = dom->dom_next) {
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if (dom->dom_rtdetach == NULL)
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continue;
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for (table = 0; table < rt_numfibs; table++) {
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fam = dom->dom_family;
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if (table != 0 && fam != AF_INET6 && fam != AF_INET)
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break;
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rnh = rt_tables_get_rnh_ptr(table, fam);
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if (rnh == NULL)
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panic("%s: rnh NULL", __func__);
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dom->dom_rtdetach((void **)rnh, 0);
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}
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}
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free(V_rt_tables, M_RTABLE);
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uma_zdestroy(V_rtzone);
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}
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VNET_SYSUNINIT(vnet_route_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST,
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vnet_route_uninit, 0);
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#endif
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struct rib_head *
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rt_table_init(int offset)
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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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/* Init locks */
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RIB_LOCK_INIT(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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rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head);
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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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#ifndef _SYS_SYSPROTO_H_
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struct setfib_args {
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int fibnum;
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};
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#endif
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int
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sys_setfib(struct thread *td, struct setfib_args *uap)
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{
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if (uap->fibnum < 0 || uap->fibnum >= rt_numfibs)
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return EINVAL;
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td->td_proc->p_fibnum = uap->fibnum;
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return (0);
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}
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|
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/*
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* Packet routing routines.
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*/
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void
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rtalloc_ign_fib(struct route *ro, u_long ignore, u_int fibnum)
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{
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struct rtentry *rt;
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if ((rt = ro->ro_rt) != NULL) {
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if (rt->rt_ifp != NULL && rt->rt_flags & RTF_UP)
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return;
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RTFREE(rt);
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ro->ro_rt = NULL;
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}
|
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ro->ro_rt = rtalloc1_fib(&ro->ro_dst, 1, ignore, fibnum);
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if (ro->ro_rt)
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RT_UNLOCK(ro->ro_rt);
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}
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|
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/*
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* Look up the route that matches the address given
|
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* Or, at least try.. Create a cloned route if needed.
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*
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* The returned route, if any, is locked.
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*/
|
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struct rtentry *
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rtalloc1(struct sockaddr *dst, int report, u_long ignflags)
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{
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|
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return (rtalloc1_fib(dst, report, ignflags, RT_DEFAULT_FIB));
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}
|
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|
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struct rtentry *
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rtalloc1_fib(struct sockaddr *dst, int report, u_long ignflags,
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u_int fibnum)
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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 *newrt;
|
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struct rt_addrinfo info;
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int err = 0, msgtype = RTM_MISS;
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|
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KASSERT((fibnum < rt_numfibs), ("rtalloc1_fib: bad fibnum"));
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rh = rt_tables_get_rnh(fibnum, dst->sa_family);
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newrt = NULL;
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if (rh == NULL)
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goto miss;
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|
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/*
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* Look up the address in the table for that Address Family
|
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*/
|
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if ((ignflags & RTF_RNH_LOCKED) == 0)
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RIB_RLOCK(rh);
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#ifdef INVARIANTS
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else
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RIB_LOCK_ASSERT(rh);
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#endif
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rn = rh->rnh_matchaddr(dst, &rh->head);
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if (rn && ((rn->rn_flags & RNF_ROOT) == 0)) {
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newrt = RNTORT(rn);
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RT_LOCK(newrt);
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RT_ADDREF(newrt);
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if ((ignflags & RTF_RNH_LOCKED) == 0)
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RIB_RUNLOCK(rh);
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return (newrt);
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} else if ((ignflags & RTF_RNH_LOCKED) == 0)
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RIB_RUNLOCK(rh);
|
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/*
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* Either we hit the root or could not find any match,
|
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* which basically means: "cannot get there from here".
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*/
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miss:
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V_rtstat.rts_unreach++;
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|
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if (report) {
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/*
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|
* If required, report the failure to the supervising
|
|
* Authorities.
|
|
* For a delete, this is not an error. (report == 0)
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*/
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|
bzero(&info, sizeof(info));
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info.rti_info[RTAX_DST] = dst;
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rt_missmsg_fib(msgtype, &info, 0, err, fibnum);
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}
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return (newrt);
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}
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|
|
|
/*
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|
* Remove a reference count from an rtentry.
|
|
* If the count gets low enough, take it out of the routing table
|
|
*/
|
|
void
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|
rtfree(struct rtentry *rt)
|
|
{
|
|
struct rib_head *rnh;
|
|
|
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KASSERT(rt != NULL,("%s: NULL rt", __func__));
|
|
rnh = rt_tables_get_rnh(rt->rt_fibnum, rt_key(rt)->sa_family);
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KASSERT(rnh != NULL,("%s: NULL rnh", __func__));
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|
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RT_LOCK_ASSERT(rt);
|
|
|
|
/*
|
|
* The callers should use RTFREE_LOCKED() or RTFREE(), so
|
|
* we should come here exactly with the last reference.
|
|
*/
|
|
RT_REMREF(rt);
|
|
if (rt->rt_refcnt > 0) {
|
|
log(LOG_DEBUG, "%s: %p has %d refs\n", __func__, rt, rt->rt_refcnt);
|
|
goto done;
|
|
}
|
|
|
|
/*
|
|
* On last reference give the "close method" a chance
|
|
* to cleanup private state. This also permits (for
|
|
* IPv4 and IPv6) a chance to decide if the routing table
|
|
* entry should be purged immediately or at a later time.
|
|
* When an immediate purge is to happen the close routine
|
|
* typically calls rtexpunge which clears the RTF_UP flag
|
|
* on the entry so that the code below reclaims the storage.
|
|
*/
|
|
if (rt->rt_refcnt == 0 && rnh->rnh_close)
|
|
rnh->rnh_close((struct radix_node *)rt, &rnh->head);
|
|
|
|
/*
|
|
* If we are no longer "up" (and ref == 0)
|
|
* then we can free the resources associated
|
|
* with the route.
|
|
*/
|
|
if ((rt->rt_flags & RTF_UP) == 0) {
|
|
if (rt->rt_nodes->rn_flags & (RNF_ACTIVE | RNF_ROOT))
|
|
panic("rtfree 2");
|
|
/*
|
|
* the rtentry must have been removed from the routing table
|
|
* so it is represented in rttrash.. remove that now.
|
|
*/
|
|
V_rttrash--;
|
|
#ifdef DIAGNOSTIC
|
|
if (rt->rt_refcnt < 0) {
|
|
printf("rtfree: %p not freed (neg refs)\n", rt);
|
|
goto done;
|
|
}
|
|
#endif
|
|
/*
|
|
* release references on items we hold them on..
|
|
* e.g other routes and ifaddrs.
|
|
*/
|
|
if (rt->rt_ifa)
|
|
ifa_free(rt->rt_ifa);
|
|
/*
|
|
* The key is separatly alloc'd so free it (see rt_setgate()).
|
|
* This also frees the gateway, as they are always malloc'd
|
|
* together.
|
|
*/
|
|
R_Free(rt_key(rt));
|
|
|
|
/*
|
|
* and the rtentry itself of course
|
|
*/
|
|
uma_zfree(V_rtzone, rt);
|
|
return;
|
|
}
|
|
done:
|
|
RT_UNLOCK(rt);
|
|
}
|
|
|
|
|
|
/*
|
|
* Force a routing table entry to the specified
|
|
* destination to go through the given gateway.
|
|
* Normally called as a result of a routing redirect
|
|
* message from the network layer.
|
|
*/
|
|
void
|
|
rtredirect_fib(struct sockaddr *dst,
|
|
struct sockaddr *gateway,
|
|
struct sockaddr *netmask,
|
|
int flags,
|
|
struct sockaddr *src,
|
|
u_int fibnum)
|
|
{
|
|
struct rtentry *rt;
|
|
int error = 0;
|
|
short *stat = NULL;
|
|
struct rt_addrinfo info;
|
|
struct ifaddr *ifa;
|
|
struct rib_head *rnh;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
ifa = NULL;
|
|
rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
|
|
if (rnh == NULL) {
|
|
error = EAFNOSUPPORT;
|
|
goto out;
|
|
}
|
|
/* verify the gateway is directly reachable */
|
|
if ((ifa = ifa_ifwithnet(gateway, 0, fibnum)) == NULL) {
|
|
error = ENETUNREACH;
|
|
goto out;
|
|
}
|
|
rt = rtalloc1_fib(dst, 0, 0UL, fibnum); /* NB: rt is locked */
|
|
/*
|
|
* If the redirect isn't from our current router for this dst,
|
|
* it's either old or wrong. If it redirects us to ourselves,
|
|
* we have a routing loop, perhaps as a result of an interface
|
|
* going down recently.
|
|
*/
|
|
if (!(flags & RTF_DONE) && rt) {
|
|
if (!sa_equal(src, rt->rt_gateway)) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
if (rt->rt_ifa != ifa && ifa->ifa_addr->sa_family != AF_LINK) {
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
}
|
|
if ((flags & RTF_GATEWAY) && ifa_ifwithaddr_check(gateway)) {
|
|
error = EHOSTUNREACH;
|
|
goto done;
|
|
}
|
|
/*
|
|
* Create a new entry if we just got back a wildcard entry
|
|
* or the lookup failed. This is necessary for hosts
|
|
* which use routing redirects generated by smart gateways
|
|
* to dynamically build the routing tables.
|
|
*/
|
|
if (rt == NULL || (rt_mask(rt) && rt_mask(rt)->sa_len < 2))
|
|
goto create;
|
|
/*
|
|
* Don't listen to the redirect if it's
|
|
* for a route to an interface.
|
|
*/
|
|
if (rt->rt_flags & RTF_GATEWAY) {
|
|
if (((rt->rt_flags & RTF_HOST) == 0) && (flags & RTF_HOST)) {
|
|
/*
|
|
* Changing from route to net => route to host.
|
|
* Create new route, rather than smashing route to net.
|
|
*/
|
|
create:
|
|
if (rt != NULL)
|
|
RTFREE_LOCKED(rt);
|
|
|
|
flags |= RTF_DYNAMIC;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = dst;
|
|
info.rti_info[RTAX_GATEWAY] = gateway;
|
|
info.rti_info[RTAX_NETMASK] = netmask;
|
|
ifa_ref(ifa);
|
|
info.rti_ifa = ifa;
|
|
info.rti_flags = flags;
|
|
error = rtrequest1_fib(RTM_ADD, &info, &rt, fibnum);
|
|
if (rt != NULL) {
|
|
RT_LOCK(rt);
|
|
flags = rt->rt_flags;
|
|
}
|
|
|
|
stat = &V_rtstat.rts_dynamic;
|
|
} else {
|
|
|
|
/*
|
|
* Smash the current notion of the gateway to
|
|
* this destination. Should check about netmask!!!
|
|
*/
|
|
if ((flags & RTF_GATEWAY) == 0)
|
|
rt->rt_flags &= ~RTF_GATEWAY;
|
|
rt->rt_flags |= RTF_MODIFIED;
|
|
flags |= RTF_MODIFIED;
|
|
stat = &V_rtstat.rts_newgateway;
|
|
/*
|
|
* add the key and gateway (in one malloc'd chunk).
|
|
*/
|
|
RT_UNLOCK(rt);
|
|
RIB_WLOCK(rnh);
|
|
RT_LOCK(rt);
|
|
rt_setgate(rt, rt_key(rt), gateway);
|
|
RIB_WUNLOCK(rnh);
|
|
}
|
|
} else
|
|
error = EHOSTUNREACH;
|
|
done:
|
|
if (rt)
|
|
RTFREE_LOCKED(rt);
|
|
out:
|
|
if (error)
|
|
V_rtstat.rts_badredirect++;
|
|
else if (stat != NULL)
|
|
(*stat)++;
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = dst;
|
|
info.rti_info[RTAX_GATEWAY] = gateway;
|
|
info.rti_info[RTAX_NETMASK] = netmask;
|
|
info.rti_info[RTAX_AUTHOR] = src;
|
|
rt_missmsg_fib(RTM_REDIRECT, &info, flags, error, fibnum);
|
|
}
|
|
|
|
/*
|
|
* Routing table ioctl interface.
|
|
*/
|
|
int
|
|
rtioctl_fib(u_long req, caddr_t data, u_int fibnum)
|
|
{
|
|
|
|
/*
|
|
* If more ioctl commands are added here, make sure the proper
|
|
* super-user checks are being performed because it is possible for
|
|
* prison-root to make it this far if raw sockets have been enabled
|
|
* in jails.
|
|
*/
|
|
#ifdef INET
|
|
/* Multicast goop, grrr... */
|
|
return mrt_ioctl ? mrt_ioctl(req, data, fibnum) : EOPNOTSUPP;
|
|
#else /* INET */
|
|
return ENXIO;
|
|
#endif /* INET */
|
|
}
|
|
|
|
struct ifaddr *
|
|
ifa_ifwithroute(int flags, const struct sockaddr *dst, struct sockaddr *gateway,
|
|
u_int fibnum)
|
|
{
|
|
struct ifaddr *ifa;
|
|
int not_found = 0;
|
|
|
|
MPASS(in_epoch(net_epoch_preempt));
|
|
if ((flags & RTF_GATEWAY) == 0) {
|
|
/*
|
|
* If we are adding a route to an interface,
|
|
* and the interface is a pt to pt link
|
|
* we should search for the destination
|
|
* as our clue to the interface. Otherwise
|
|
* we can use the local address.
|
|
*/
|
|
ifa = NULL;
|
|
if (flags & RTF_HOST)
|
|
ifa = ifa_ifwithdstaddr(dst, fibnum);
|
|
if (ifa == NULL)
|
|
ifa = ifa_ifwithaddr(gateway);
|
|
} else {
|
|
/*
|
|
* If we are adding a route to a remote net
|
|
* or host, the gateway may still be on the
|
|
* other end of a pt to pt link.
|
|
*/
|
|
ifa = ifa_ifwithdstaddr(gateway, fibnum);
|
|
}
|
|
if (ifa == NULL)
|
|
ifa = ifa_ifwithnet(gateway, 0, fibnum);
|
|
if (ifa == NULL) {
|
|
struct rtentry *rt;
|
|
|
|
rt = rtalloc1_fib(gateway, 0, flags, fibnum);
|
|
if (rt == NULL)
|
|
goto out;
|
|
/*
|
|
* dismiss a gateway that is reachable only
|
|
* through the default router
|
|
*/
|
|
switch (gateway->sa_family) {
|
|
case AF_INET:
|
|
if (satosin(rt_key(rt))->sin_addr.s_addr == INADDR_ANY)
|
|
not_found = 1;
|
|
break;
|
|
case AF_INET6:
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&satosin6(rt_key(rt))->sin6_addr))
|
|
not_found = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (!not_found && rt->rt_ifa != NULL) {
|
|
ifa = rt->rt_ifa;
|
|
}
|
|
RT_REMREF(rt);
|
|
RT_UNLOCK(rt);
|
|
if (not_found || ifa == NULL)
|
|
goto out;
|
|
}
|
|
if (ifa->ifa_addr->sa_family != dst->sa_family) {
|
|
struct ifaddr *oifa = ifa;
|
|
ifa = ifaof_ifpforaddr(dst, ifa->ifa_ifp);
|
|
if (ifa == NULL)
|
|
ifa = oifa;
|
|
}
|
|
out:
|
|
return (ifa);
|
|
}
|
|
|
|
/*
|
|
* Do appropriate manipulations of a routing tree given
|
|
* all the bits of info needed
|
|
*/
|
|
int
|
|
rtrequest_fib(int req,
|
|
struct sockaddr *dst,
|
|
struct sockaddr *gateway,
|
|
struct sockaddr *netmask,
|
|
int flags,
|
|
struct rtentry **ret_nrt,
|
|
u_int fibnum)
|
|
{
|
|
struct rt_addrinfo info;
|
|
|
|
if (dst->sa_len == 0)
|
|
return(EINVAL);
|
|
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
info.rti_flags = flags;
|
|
info.rti_info[RTAX_DST] = dst;
|
|
info.rti_info[RTAX_GATEWAY] = gateway;
|
|
info.rti_info[RTAX_NETMASK] = netmask;
|
|
return rtrequest1_fib(req, &info, ret_nrt, fibnum);
|
|
}
|
|
|
|
|
|
/*
|
|
* Copy most of @rt data into @info.
|
|
*
|
|
* If @flags contains NHR_COPY, copies dst,netmask and gw to the
|
|
* pointers specified by @info structure. Assume such pointers
|
|
* are zeroed sockaddr-like structures with sa_len field initialized
|
|
* to reflect size of the provided buffer. if no NHR_COPY is specified,
|
|
* point dst,netmask and gw @info fields to appropriate @rt values.
|
|
*
|
|
* if @flags contains NHR_REF, do refcouting on rt_ifp.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info, int flags)
|
|
{
|
|
struct rt_metrics *rmx;
|
|
struct sockaddr *src, *dst;
|
|
int sa_len;
|
|
|
|
if (flags & NHR_COPY) {
|
|
/* Copy destination if dst is non-zero */
|
|
src = rt_key(rt);
|
|
dst = info->rti_info[RTAX_DST];
|
|
sa_len = src->sa_len;
|
|
if (dst != NULL) {
|
|
if (src->sa_len > dst->sa_len)
|
|
return (ENOMEM);
|
|
memcpy(dst, src, src->sa_len);
|
|
info->rti_addrs |= RTA_DST;
|
|
}
|
|
|
|
/* Copy mask if set && dst is non-zero */
|
|
src = rt_mask(rt);
|
|
dst = info->rti_info[RTAX_NETMASK];
|
|
if (src != NULL && dst != NULL) {
|
|
|
|
/*
|
|
* Radix stores different value in sa_len,
|
|
* assume rt_mask() to have the same length
|
|
* as rt_key()
|
|
*/
|
|
if (sa_len > dst->sa_len)
|
|
return (ENOMEM);
|
|
memcpy(dst, src, src->sa_len);
|
|
info->rti_addrs |= RTA_NETMASK;
|
|
}
|
|
|
|
/* Copy gateway is set && dst is non-zero */
|
|
src = rt->rt_gateway;
|
|
dst = info->rti_info[RTAX_GATEWAY];
|
|
if ((rt->rt_flags & RTF_GATEWAY) && src != NULL && dst != NULL){
|
|
if (src->sa_len > dst->sa_len)
|
|
return (ENOMEM);
|
|
memcpy(dst, src, src->sa_len);
|
|
info->rti_addrs |= RTA_GATEWAY;
|
|
}
|
|
} else {
|
|
info->rti_info[RTAX_DST] = rt_key(rt);
|
|
info->rti_addrs |= RTA_DST;
|
|
if (rt_mask(rt) != NULL) {
|
|
info->rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
info->rti_addrs |= RTA_NETMASK;
|
|
}
|
|
if (rt->rt_flags & RTF_GATEWAY) {
|
|
info->rti_info[RTAX_GATEWAY] = rt->rt_gateway;
|
|
info->rti_addrs |= RTA_GATEWAY;
|
|
}
|
|
}
|
|
|
|
rmx = info->rti_rmx;
|
|
if (rmx != NULL) {
|
|
info->rti_mflags |= RTV_MTU;
|
|
rmx->rmx_mtu = rt->rt_mtu;
|
|
}
|
|
|
|
info->rti_flags = rt->rt_flags;
|
|
info->rti_ifp = rt->rt_ifp;
|
|
info->rti_ifa = rt->rt_ifa;
|
|
ifa_ref(info->rti_ifa);
|
|
if (flags & NHR_REF) {
|
|
/* Do 'traditional' refcouting */
|
|
if_ref(info->rti_ifp);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Lookups up route entry for @dst in RIB database for fib @fibnum.
|
|
* Exports entry data to @info using rt_exportinfo().
|
|
*
|
|
* if @flags contains NHR_REF, refcouting is performed on rt_ifp.
|
|
* All references can be released later by calling rib_free_info()
|
|
*
|
|
* Returns 0 on success.
|
|
* Returns ENOENT for lookup failure, ENOMEM for export failure.
|
|
*/
|
|
int
|
|
rib_lookup_info(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags,
|
|
uint32_t flowid, struct rt_addrinfo *info)
|
|
{
|
|
RIB_RLOCK_TRACKER;
|
|
struct rib_head *rh;
|
|
struct radix_node *rn;
|
|
struct rtentry *rt;
|
|
int error;
|
|
|
|
KASSERT((fibnum < rt_numfibs), ("rib_lookup_rte: bad fibnum"));
|
|
rh = rt_tables_get_rnh(fibnum, dst->sa_family);
|
|
if (rh == NULL)
|
|
return (ENOENT);
|
|
|
|
RIB_RLOCK(rh);
|
|
rn = rh->rnh_matchaddr(__DECONST(void *, dst), &rh->head);
|
|
if (rn != NULL && ((rn->rn_flags & RNF_ROOT) == 0)) {
|
|
rt = RNTORT(rn);
|
|
/* Ensure route & ifp is UP */
|
|
if (RT_LINK_IS_UP(rt->rt_ifp)) {
|
|
flags = (flags & NHR_REF) | NHR_COPY;
|
|
error = rt_exportinfo(rt, info, flags);
|
|
RIB_RUNLOCK(rh);
|
|
|
|
return (error);
|
|
}
|
|
}
|
|
RIB_RUNLOCK(rh);
|
|
|
|
return (ENOENT);
|
|
}
|
|
|
|
/*
|
|
* Releases all references acquired by rib_lookup_info() when
|
|
* called with NHR_REF flags.
|
|
*/
|
|
void
|
|
rib_free_info(struct rt_addrinfo *info)
|
|
{
|
|
|
|
if_rele(info->rti_ifp);
|
|
}
|
|
|
|
/*
|
|
* Iterates over all existing fibs in system calling
|
|
* @setwa_f function prior to traversing each fib.
|
|
* Calls @wa_f function for each element in current fib.
|
|
* If af is not AF_UNSPEC, iterates over fibs in particular
|
|
* address family.
|
|
*/
|
|
void
|
|
rt_foreach_fib_walk(int af, rt_setwarg_t *setwa_f, rt_walktree_f_t *wa_f,
|
|
void *arg)
|
|
{
|
|
struct rib_head *rnh;
|
|
uint32_t fibnum;
|
|
int i;
|
|
|
|
for (fibnum = 0; fibnum < rt_numfibs; fibnum++) {
|
|
/* Do we want some specific family? */
|
|
if (af != AF_UNSPEC) {
|
|
rnh = rt_tables_get_rnh(fibnum, af);
|
|
if (rnh == NULL)
|
|
continue;
|
|
if (setwa_f != NULL)
|
|
setwa_f(rnh, fibnum, af, arg);
|
|
|
|
RIB_WLOCK(rnh);
|
|
rnh->rnh_walktree(&rnh->head, (walktree_f_t *)wa_f,arg);
|
|
RIB_WUNLOCK(rnh);
|
|
continue;
|
|
}
|
|
|
|
for (i = 1; i <= AF_MAX; i++) {
|
|
rnh = rt_tables_get_rnh(fibnum, i);
|
|
if (rnh == NULL)
|
|
continue;
|
|
if (setwa_f != NULL)
|
|
setwa_f(rnh, fibnum, i, arg);
|
|
|
|
RIB_WLOCK(rnh);
|
|
rnh->rnh_walktree(&rnh->head, (walktree_f_t *)wa_f,arg);
|
|
RIB_WUNLOCK(rnh);
|
|
}
|
|
}
|
|
}
|
|
|
|
struct rt_delinfo
|
|
{
|
|
struct rt_addrinfo info;
|
|
struct rib_head *rnh;
|
|
struct rtentry *head;
|
|
};
|
|
|
|
/*
|
|
* Conditionally unlinks @rn from radix tree based
|
|
* on info data passed in @arg.
|
|
*/
|
|
static int
|
|
rt_checkdelroute(struct radix_node *rn, void *arg)
|
|
{
|
|
struct rt_delinfo *di;
|
|
struct rt_addrinfo *info;
|
|
struct rtentry *rt;
|
|
int error;
|
|
|
|
di = (struct rt_delinfo *)arg;
|
|
rt = (struct rtentry *)rn;
|
|
info = &di->info;
|
|
error = 0;
|
|
|
|
info->rti_info[RTAX_DST] = rt_key(rt);
|
|
info->rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
info->rti_info[RTAX_GATEWAY] = rt->rt_gateway;
|
|
|
|
rt = rt_unlinkrte(di->rnh, info, &error);
|
|
if (rt == NULL) {
|
|
/* Either not allowed or not matched. Skip entry */
|
|
return (0);
|
|
}
|
|
|
|
/* Entry was unlinked. Add to the list and return */
|
|
rt->rt_chain = di->head;
|
|
di->head = rt;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Iterates over all existing fibs in system.
|
|
* Deletes each element for which @filter_f function returned
|
|
* non-zero value.
|
|
* If @af is not AF_UNSPEC, iterates over fibs in particular
|
|
* address family.
|
|
*/
|
|
void
|
|
rt_foreach_fib_walk_del(int af, rt_filter_f_t *filter_f, void *arg)
|
|
{
|
|
struct rib_head *rnh;
|
|
struct rt_delinfo di;
|
|
struct rtentry *rt;
|
|
uint32_t fibnum;
|
|
int i, start, end;
|
|
|
|
bzero(&di, sizeof(di));
|
|
di.info.rti_filter = filter_f;
|
|
di.info.rti_filterdata = arg;
|
|
|
|
for (fibnum = 0; fibnum < rt_numfibs; fibnum++) {
|
|
/* Do we want some specific family? */
|
|
if (af != AF_UNSPEC) {
|
|
start = af;
|
|
end = af;
|
|
} else {
|
|
start = 1;
|
|
end = AF_MAX;
|
|
}
|
|
|
|
for (i = start; i <= end; i++) {
|
|
rnh = rt_tables_get_rnh(fibnum, i);
|
|
if (rnh == NULL)
|
|
continue;
|
|
di.rnh = rnh;
|
|
|
|
RIB_WLOCK(rnh);
|
|
rnh->rnh_walktree(&rnh->head, rt_checkdelroute, &di);
|
|
RIB_WUNLOCK(rnh);
|
|
|
|
if (di.head == NULL)
|
|
continue;
|
|
|
|
/* We might have something to reclaim */
|
|
while (di.head != NULL) {
|
|
rt = di.head;
|
|
di.head = rt->rt_chain;
|
|
rt->rt_chain = NULL;
|
|
|
|
/* TODO std rt -> rt_addrinfo export */
|
|
di.info.rti_info[RTAX_DST] = rt_key(rt);
|
|
di.info.rti_info[RTAX_NETMASK] = rt_mask(rt);
|
|
|
|
rt_notifydelete(rt, &di.info);
|
|
RTFREE_LOCKED(rt);
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete Routes for a Network Interface
|
|
*
|
|
* Called for each routing entry via the rnh->rnh_walktree() call above
|
|
* to delete all route entries referencing a detaching network interface.
|
|
*
|
|
* Arguments:
|
|
* rt pointer to rtentry
|
|
* arg argument passed to rnh->rnh_walktree() - detaching interface
|
|
*
|
|
* Returns:
|
|
* 0 successful
|
|
* errno failed - reason indicated
|
|
*/
|
|
static int
|
|
rt_ifdelroute(const struct rtentry *rt, void *arg)
|
|
{
|
|
struct ifnet *ifp = arg;
|
|
|
|
if (rt->rt_ifp != ifp)
|
|
return (0);
|
|
|
|
/*
|
|
* Protect (sorta) against walktree recursion problems
|
|
* with cloned routes
|
|
*/
|
|
if ((rt->rt_flags & RTF_UP) == 0)
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Delete all remaining routes using this interface
|
|
* Unfortuneatly the only way to do this is to slog through
|
|
* the entire routing table looking for routes which point
|
|
* to this interface...oh well...
|
|
*/
|
|
void
|
|
rt_flushifroutes_af(struct ifnet *ifp, int af)
|
|
{
|
|
KASSERT((af >= 1 && af <= AF_MAX), ("%s: af %d not >= 1 and <= %d",
|
|
__func__, af, AF_MAX));
|
|
|
|
rt_foreach_fib_walk_del(af, rt_ifdelroute, ifp);
|
|
}
|
|
|
|
void
|
|
rt_flushifroutes(struct ifnet *ifp)
|
|
{
|
|
|
|
rt_foreach_fib_walk_del(AF_UNSPEC, rt_ifdelroute, ifp);
|
|
}
|
|
|
|
/*
|
|
* Conditionally unlinks rtentry matching data inside @info from @rnh.
|
|
* Returns unlinked, locked and referenced @rtentry on success,
|
|
* Returns NULL and sets @perror to:
|
|
* ESRCH - if prefix was not found,
|
|
* EADDRINUSE - if trying to delete PINNED route without appropriate flag.
|
|
* ENOENT - if supplied filter function returned 0 (not matched).
|
|
*/
|
|
static struct rtentry *
|
|
rt_unlinkrte(struct rib_head *rnh, struct rt_addrinfo *info, int *perror)
|
|
{
|
|
struct sockaddr *dst, *netmask;
|
|
struct rtentry *rt;
|
|
struct radix_node *rn;
|
|
|
|
dst = info->rti_info[RTAX_DST];
|
|
netmask = info->rti_info[RTAX_NETMASK];
|
|
|
|
rt = (struct rtentry *)rnh->rnh_lookup(dst, netmask, &rnh->head);
|
|
if (rt == NULL) {
|
|
*perror = ESRCH;
|
|
return (NULL);
|
|
}
|
|
|
|
if ((info->rti_flags & RTF_PINNED) == 0) {
|
|
/* Check if target route can be deleted */
|
|
if (rt->rt_flags & RTF_PINNED) {
|
|
*perror = EADDRINUSE;
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
if (info->rti_filter != NULL) {
|
|
if (info->rti_filter(rt, info->rti_filterdata) == 0) {
|
|
/* Not matched */
|
|
*perror = ENOENT;
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Filter function requested rte deletion.
|
|
* Ease the caller work by filling in remaining info
|
|
* from that particular entry.
|
|
*/
|
|
info->rti_info[RTAX_GATEWAY] = rt->rt_gateway;
|
|
}
|
|
|
|
/*
|
|
* Remove the item from the tree and return it.
|
|
* Complain if it is not there and do no more processing.
|
|
*/
|
|
*perror = ESRCH;
|
|
#ifdef RADIX_MPATH
|
|
if (rt_mpath_capable(rnh))
|
|
rn = rt_mpath_unlink(rnh, info, rt, perror);
|
|
else
|
|
#endif
|
|
rn = rnh->rnh_deladdr(dst, netmask, &rnh->head);
|
|
if (rn == NULL)
|
|
return (NULL);
|
|
|
|
if (rn->rn_flags & (RNF_ACTIVE | RNF_ROOT))
|
|
panic ("rtrequest delete");
|
|
|
|
rt = RNTORT(rn);
|
|
RT_LOCK(rt);
|
|
RT_ADDREF(rt);
|
|
rt->rt_flags &= ~RTF_UP;
|
|
|
|
*perror = 0;
|
|
|
|
return (rt);
|
|
}
|
|
|
|
static void
|
|
rt_notifydelete(struct rtentry *rt, struct rt_addrinfo *info)
|
|
{
|
|
struct ifaddr *ifa;
|
|
|
|
/*
|
|
* give the protocol a chance to keep things in sync.
|
|
*/
|
|
ifa = rt->rt_ifa;
|
|
if (ifa != NULL && ifa->ifa_rtrequest != NULL)
|
|
ifa->ifa_rtrequest(RTM_DELETE, rt, info);
|
|
|
|
/*
|
|
* One more rtentry floating around that is not
|
|
* linked to the routing table. rttrash will be decremented
|
|
* when RTFREE(rt) is eventually called.
|
|
*/
|
|
V_rttrash++;
|
|
}
|
|
|
|
|
|
/*
|
|
* These (questionable) definitions of apparent local variables apply
|
|
* to the next two functions. XXXXXX!!!
|
|
*/
|
|
#define dst info->rti_info[RTAX_DST]
|
|
#define gateway info->rti_info[RTAX_GATEWAY]
|
|
#define netmask info->rti_info[RTAX_NETMASK]
|
|
#define ifaaddr info->rti_info[RTAX_IFA]
|
|
#define ifpaddr info->rti_info[RTAX_IFP]
|
|
#define flags info->rti_flags
|
|
|
|
/*
|
|
* Look up rt_addrinfo for a specific fib. Note that if rti_ifa is defined,
|
|
* it will be referenced so the caller must free it.
|
|
*
|
|
* 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)
|
|
{
|
|
struct epoch_tracker et;
|
|
int needref, error;
|
|
|
|
/*
|
|
* ifp may be specified by sockaddr_dl
|
|
* when protocol address is ambiguous.
|
|
*/
|
|
error = 0;
|
|
needref = (info->rti_ifa == NULL);
|
|
NET_EPOCH_ENTER(et);
|
|
|
|
/* If we have interface specified by the ifindex in the address, use it */
|
|
if (info->rti_ifp == NULL && ifpaddr != NULL &&
|
|
ifpaddr->sa_family == AF_LINK) {
|
|
const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)ifpaddr;
|
|
if (sdl->sdl_index != 0)
|
|
info->rti_ifp = ifnet_byindex_locked(sdl->sdl_index);
|
|
}
|
|
/*
|
|
* 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) {
|
|
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 (needref && info->rti_ifa != NULL) {
|
|
if (info->rti_ifp == NULL)
|
|
info->rti_ifp = info->rti_ifa->ifa_ifp;
|
|
ifa_ref(info->rti_ifa);
|
|
} else
|
|
error = ENETUNREACH;
|
|
NET_EPOCH_EXIT(et);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
if_updatemtu_cb(struct radix_node *rn, void *arg)
|
|
{
|
|
struct rtentry *rt;
|
|
struct if_mtuinfo *ifmtu;
|
|
|
|
rt = (struct rtentry *)rn;
|
|
ifmtu = (struct if_mtuinfo *)arg;
|
|
|
|
if (rt->rt_ifp != ifmtu->ifp)
|
|
return (0);
|
|
|
|
if (rt->rt_mtu >= ifmtu->mtu) {
|
|
/* We have to decrease mtu regardless of flags */
|
|
rt->rt_mtu = ifmtu->mtu;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* New MTU is bigger. Check if are allowed to alter it
|
|
*/
|
|
if ((rt->rt_flags & (RTF_FIXEDMTU | RTF_GATEWAY | RTF_HOST)) != 0) {
|
|
|
|
/*
|
|
* Skip routes with user-supplied MTU and
|
|
* non-interface routes
|
|
*/
|
|
return (0);
|
|
}
|
|
|
|
/* We are safe to update route MTU */
|
|
rt->rt_mtu = ifmtu->mtu;
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
rt_updatemtu(struct ifnet *ifp)
|
|
{
|
|
struct if_mtuinfo ifmtu;
|
|
struct rib_head *rnh;
|
|
int i, j;
|
|
|
|
ifmtu.ifp = ifp;
|
|
|
|
/*
|
|
* 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++) {
|
|
ifmtu.mtu = if_getmtu_family(ifp, i);
|
|
for (j = 0; j < rt_numfibs; j++) {
|
|
rnh = rt_tables_get_rnh(j, i);
|
|
if (rnh == NULL)
|
|
continue;
|
|
RIB_WLOCK(rnh);
|
|
rnh->rnh_walktree(&rnh->head, if_updatemtu_cb, &ifmtu);
|
|
RIB_WUNLOCK(rnh);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#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_gateway);
|
|
}
|
|
|
|
return (i);
|
|
}
|
|
#endif
|
|
|
|
#ifdef RADIX_MPATH
|
|
/*
|
|
* Deletes key for single-path routes, unlinks rtentry with
|
|
* gateway specified in @info from multi-path routes.
|
|
*
|
|
* Returnes unlinked entry. In case of failure, returns NULL
|
|
* and sets @perror to ESRCH.
|
|
*/
|
|
static struct radix_node *
|
|
rt_mpath_unlink(struct rib_head *rnh, struct rt_addrinfo *info,
|
|
struct rtentry *rto, int *perror)
|
|
{
|
|
/*
|
|
* if we got multipath routes, we require users to specify
|
|
* a matching RTAX_GATEWAY.
|
|
*/
|
|
struct rtentry *rt; // *rto = NULL;
|
|
struct radix_node *rn;
|
|
struct sockaddr *gw;
|
|
|
|
gw = info->rti_info[RTAX_GATEWAY];
|
|
rt = rt_mpath_matchgate(rto, gw);
|
|
if (rt == NULL) {
|
|
*perror = ESRCH;
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* this is the first entry in the chain
|
|
*/
|
|
if (rto == rt) {
|
|
rn = rn_mpath_next((struct radix_node *)rt);
|
|
/*
|
|
* there is another entry, now it's active
|
|
*/
|
|
if (rn) {
|
|
rto = RNTORT(rn);
|
|
RT_LOCK(rto);
|
|
rto->rt_flags |= RTF_UP;
|
|
RT_UNLOCK(rto);
|
|
} else if (rt->rt_flags & RTF_GATEWAY) {
|
|
/*
|
|
* For gateway routes, we need to
|
|
* make sure that we we are deleting
|
|
* the correct gateway.
|
|
* rt_mpath_matchgate() does not
|
|
* check the case when there is only
|
|
* one route in the chain.
|
|
*/
|
|
if (gw &&
|
|
(rt->rt_gateway->sa_len != gw->sa_len ||
|
|
memcmp(rt->rt_gateway, gw, gw->sa_len))) {
|
|
*perror = ESRCH;
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* use the normal delete code to remove
|
|
* the first entry
|
|
*/
|
|
rn = rnh->rnh_deladdr(dst, netmask, &rnh->head);
|
|
*perror = 0;
|
|
return (rn);
|
|
}
|
|
|
|
/*
|
|
* if the entry is 2nd and on up
|
|
*/
|
|
if (rt_mpath_deldup(rto, rt) == 0)
|
|
panic ("rtrequest1: rt_mpath_deldup");
|
|
*perror = 0;
|
|
rn = (struct radix_node *)rt;
|
|
return (rn);
|
|
}
|
|
#endif
|
|
|
|
int
|
|
rtrequest1_fib(int req, struct rt_addrinfo *info, struct rtentry **ret_nrt,
|
|
u_int fibnum)
|
|
{
|
|
int error = 0;
|
|
struct rtentry *rt, *rt_old;
|
|
struct radix_node *rn;
|
|
struct rib_head *rnh;
|
|
struct ifaddr *ifa;
|
|
struct sockaddr *ndst;
|
|
struct sockaddr_storage mdst;
|
|
|
|
KASSERT((fibnum < rt_numfibs), ("rtrequest1_fib: bad fibnum"));
|
|
KASSERT((flags & RTF_RNH_LOCKED) == 0, ("rtrequest1_fib: locked"));
|
|
switch (dst->sa_family) {
|
|
case AF_INET6:
|
|
case AF_INET:
|
|
/* We support multiple FIBs. */
|
|
break;
|
|
default:
|
|
fibnum = RT_DEFAULT_FIB;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Find the correct routing tree to use for this Address Family
|
|
*/
|
|
rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
|
|
if (rnh == NULL)
|
|
return (EAFNOSUPPORT);
|
|
|
|
/*
|
|
* If we are adding a host route then we don't want to put
|
|
* a netmask in the tree, nor do we want to clone it.
|
|
*/
|
|
if (flags & RTF_HOST)
|
|
netmask = NULL;
|
|
|
|
switch (req) {
|
|
case RTM_DELETE:
|
|
if (netmask) {
|
|
if (dst->sa_len > sizeof(mdst))
|
|
return (EINVAL);
|
|
rt_maskedcopy(dst, (struct sockaddr *)&mdst, netmask);
|
|
dst = (struct sockaddr *)&mdst;
|
|
}
|
|
|
|
RIB_WLOCK(rnh);
|
|
rt = rt_unlinkrte(rnh, info, &error);
|
|
RIB_WUNLOCK(rnh);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
rt_notifydelete(rt, info);
|
|
|
|
/*
|
|
* If the caller wants it, then it can have it,
|
|
* but it's up to it to free the rtentry as we won't be
|
|
* doing it.
|
|
*/
|
|
if (ret_nrt) {
|
|
*ret_nrt = rt;
|
|
RT_UNLOCK(rt);
|
|
} else
|
|
RTFREE_LOCKED(rt);
|
|
break;
|
|
case RTM_RESOLVE:
|
|
/*
|
|
* resolve was only used for route cloning
|
|
* here for compat
|
|
*/
|
|
break;
|
|
case RTM_ADD:
|
|
if ((flags & RTF_GATEWAY) && !gateway)
|
|
return (EINVAL);
|
|
if (dst && gateway && (dst->sa_family != gateway->sa_family) &&
|
|
(gateway->sa_family != AF_UNSPEC) && (gateway->sa_family != AF_LINK))
|
|
return (EINVAL);
|
|
|
|
if (info->rti_ifa == NULL) {
|
|
error = rt_getifa_fib(info, fibnum);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
rt = uma_zalloc(V_rtzone, M_NOWAIT);
|
|
if (rt == NULL) {
|
|
return (ENOBUFS);
|
|
}
|
|
rt->rt_flags = RTF_UP | flags;
|
|
rt->rt_fibnum = fibnum;
|
|
/*
|
|
* Add the gateway. Possibly re-malloc-ing the storage for it.
|
|
*/
|
|
if ((error = rt_setgate(rt, dst, gateway)) != 0) {
|
|
uma_zfree(V_rtzone, rt);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* point to the (possibly newly malloc'd) dest address.
|
|
*/
|
|
ndst = (struct sockaddr *)rt_key(rt);
|
|
|
|
/*
|
|
* make sure it contains the value we want (masked if needed).
|
|
*/
|
|
if (netmask) {
|
|
rt_maskedcopy(dst, ndst, netmask);
|
|
} else
|
|
bcopy(dst, ndst, dst->sa_len);
|
|
|
|
/*
|
|
* We use the ifa reference returned by rt_getifa_fib().
|
|
* This moved from below so that rnh->rnh_addaddr() can
|
|
* examine the ifa and ifa->ifa_ifp if it so desires.
|
|
*/
|
|
ifa = info->rti_ifa;
|
|
ifa_ref(ifa);
|
|
rt->rt_ifa = ifa;
|
|
rt->rt_ifp = ifa->ifa_ifp;
|
|
rt->rt_weight = 1;
|
|
|
|
rt_setmetrics(info, rt);
|
|
|
|
RIB_WLOCK(rnh);
|
|
RT_LOCK(rt);
|
|
#ifdef RADIX_MPATH
|
|
/* do not permit exactly the same dst/mask/gw pair */
|
|
if (rt_mpath_capable(rnh) &&
|
|
rt_mpath_conflict(rnh, rt, netmask)) {
|
|
RIB_WUNLOCK(rnh);
|
|
|
|
ifa_free(rt->rt_ifa);
|
|
R_Free(rt_key(rt));
|
|
uma_zfree(V_rtzone, rt);
|
|
return (EEXIST);
|
|
}
|
|
#endif
|
|
|
|
/* XXX mtu manipulation will be done in rnh_addaddr -- itojun */
|
|
rn = rnh->rnh_addaddr(ndst, netmask, &rnh->head, rt->rt_nodes);
|
|
|
|
rt_old = NULL;
|
|
if (rn == NULL && (info->rti_flags & RTF_PINNED) != 0) {
|
|
|
|
/*
|
|
* Force removal and re-try addition
|
|
* TODO: better multipath&pinned support
|
|
*/
|
|
struct sockaddr *info_dst = info->rti_info[RTAX_DST];
|
|
info->rti_info[RTAX_DST] = ndst;
|
|
/* Do not delete existing PINNED(interface) routes */
|
|
info->rti_flags &= ~RTF_PINNED;
|
|
rt_old = rt_unlinkrte(rnh, info, &error);
|
|
info->rti_flags |= RTF_PINNED;
|
|
info->rti_info[RTAX_DST] = info_dst;
|
|
if (rt_old != NULL)
|
|
rn = rnh->rnh_addaddr(ndst, netmask, &rnh->head,
|
|
rt->rt_nodes);
|
|
}
|
|
RIB_WUNLOCK(rnh);
|
|
|
|
if (rt_old != NULL)
|
|
RT_UNLOCK(rt_old);
|
|
|
|
/*
|
|
* If it still failed to go into the tree,
|
|
* then un-make it (this should be a function)
|
|
*/
|
|
if (rn == NULL) {
|
|
ifa_free(rt->rt_ifa);
|
|
R_Free(rt_key(rt));
|
|
uma_zfree(V_rtzone, rt);
|
|
return (EEXIST);
|
|
}
|
|
|
|
if (rt_old != NULL) {
|
|
rt_notifydelete(rt_old, info);
|
|
RTFREE(rt_old);
|
|
}
|
|
|
|
/*
|
|
* If this protocol has something to add to this then
|
|
* allow it to do that as well.
|
|
*/
|
|
if (ifa->ifa_rtrequest)
|
|
ifa->ifa_rtrequest(req, rt, info);
|
|
|
|
/*
|
|
* actually return a resultant rtentry and
|
|
* give the caller a single reference.
|
|
*/
|
|
if (ret_nrt) {
|
|
*ret_nrt = rt;
|
|
RT_ADDREF(rt);
|
|
}
|
|
rnh->rnh_gen++; /* Routing table updated */
|
|
RT_UNLOCK(rt);
|
|
break;
|
|
case RTM_CHANGE:
|
|
RIB_WLOCK(rnh);
|
|
error = rtrequest1_fib_change(rnh, info, ret_nrt, fibnum);
|
|
RIB_WUNLOCK(rnh);
|
|
break;
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
#undef dst
|
|
#undef gateway
|
|
#undef netmask
|
|
#undef ifaaddr
|
|
#undef ifpaddr
|
|
#undef flags
|
|
|
|
static int
|
|
rtrequest1_fib_change(struct rib_head *rnh, struct rt_addrinfo *info,
|
|
struct rtentry **ret_nrt, u_int fibnum)
|
|
{
|
|
struct rtentry *rt = NULL;
|
|
int error = 0;
|
|
int free_ifa = 0;
|
|
int family, mtu;
|
|
struct if_mtuinfo ifmtu;
|
|
|
|
RIB_WLOCK_ASSERT(rnh);
|
|
|
|
rt = (struct rtentry *)rnh->rnh_lookup(info->rti_info[RTAX_DST],
|
|
info->rti_info[RTAX_NETMASK], &rnh->head);
|
|
|
|
if (rt == NULL)
|
|
return (ESRCH);
|
|
|
|
#ifdef RADIX_MPATH
|
|
/*
|
|
* If we got multipath routes,
|
|
* we require users to specify a matching RTAX_GATEWAY.
|
|
*/
|
|
if (rt_mpath_capable(rnh)) {
|
|
rt = rt_mpath_matchgate(rt, info->rti_info[RTAX_GATEWAY]);
|
|
if (rt == NULL)
|
|
return (ESRCH);
|
|
}
|
|
#endif
|
|
|
|
RT_LOCK(rt);
|
|
|
|
rt_setmetrics(info, rt);
|
|
|
|
/*
|
|
* New gateway could require new ifaddr, ifp;
|
|
* flags may also be different; ifp may be specified
|
|
* by ll sockaddr when protocol address is ambiguous
|
|
*/
|
|
if (((rt->rt_flags & RTF_GATEWAY) &&
|
|
info->rti_info[RTAX_GATEWAY] != NULL) ||
|
|
info->rti_info[RTAX_IFP] != NULL ||
|
|
(info->rti_info[RTAX_IFA] != NULL &&
|
|
!sa_equal(info->rti_info[RTAX_IFA], rt->rt_ifa->ifa_addr))) {
|
|
/*
|
|
* XXX: Temporarily set RTF_RNH_LOCKED flag in the rti_flags
|
|
* to avoid rlock in the ifa_ifwithroute().
|
|
*/
|
|
info->rti_flags |= RTF_RNH_LOCKED;
|
|
error = rt_getifa_fib(info, fibnum);
|
|
info->rti_flags &= ~RTF_RNH_LOCKED;
|
|
if (info->rti_ifa != NULL)
|
|
free_ifa = 1;
|
|
|
|
if (error != 0)
|
|
goto bad;
|
|
}
|
|
|
|
/* Check if outgoing interface has changed */
|
|
if (info->rti_ifa != NULL && info->rti_ifa != rt->rt_ifa &&
|
|
rt->rt_ifa != NULL) {
|
|
if (rt->rt_ifa->ifa_rtrequest != NULL)
|
|
rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, info);
|
|
ifa_free(rt->rt_ifa);
|
|
rt->rt_ifa = NULL;
|
|
}
|
|
/* Update gateway address */
|
|
if (info->rti_info[RTAX_GATEWAY] != NULL) {
|
|
error = rt_setgate(rt, rt_key(rt), info->rti_info[RTAX_GATEWAY]);
|
|
if (error != 0)
|
|
goto bad;
|
|
|
|
rt->rt_flags &= ~RTF_GATEWAY;
|
|
rt->rt_flags |= (RTF_GATEWAY & info->rti_flags);
|
|
}
|
|
|
|
if (info->rti_ifa != NULL && info->rti_ifa != rt->rt_ifa) {
|
|
ifa_ref(info->rti_ifa);
|
|
rt->rt_ifa = info->rti_ifa;
|
|
rt->rt_ifp = info->rti_ifp;
|
|
}
|
|
/* Allow some flags to be toggled on change. */
|
|
rt->rt_flags &= ~RTF_FMASK;
|
|
rt->rt_flags |= info->rti_flags & RTF_FMASK;
|
|
|
|
if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest != NULL)
|
|
rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info);
|
|
|
|
/* Alter route MTU if necessary */
|
|
if (rt->rt_ifp != NULL) {
|
|
family = info->rti_info[RTAX_DST]->sa_family;
|
|
mtu = if_getmtu_family(rt->rt_ifp, family);
|
|
/* Set default MTU */
|
|
if (rt->rt_mtu == 0)
|
|
rt->rt_mtu = mtu;
|
|
if (rt->rt_mtu != mtu) {
|
|
/* Check if we really need to update */
|
|
ifmtu.ifp = rt->rt_ifp;
|
|
ifmtu.mtu = mtu;
|
|
if_updatemtu_cb(rt->rt_nodes, &ifmtu);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This route change may have modified the route's gateway. In that
|
|
* case, any inpcbs that have cached this route need to invalidate their
|
|
* llentry cache.
|
|
*/
|
|
rnh->rnh_gen++;
|
|
|
|
if (ret_nrt) {
|
|
*ret_nrt = rt;
|
|
RT_ADDREF(rt);
|
|
}
|
|
bad:
|
|
RT_UNLOCK(rt);
|
|
if (free_ifa != 0) {
|
|
ifa_free(info->rti_ifa);
|
|
info->rti_ifa = NULL;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
rt_setmetrics(const struct rt_addrinfo *info, struct rtentry *rt)
|
|
{
|
|
|
|
if (info->rti_mflags & RTV_MTU) {
|
|
if (info->rti_rmx->rmx_mtu != 0) {
|
|
|
|
/*
|
|
* MTU was explicitly provided by user.
|
|
* Keep it.
|
|
*/
|
|
rt->rt_flags |= RTF_FIXEDMTU;
|
|
} else {
|
|
|
|
/*
|
|
* User explicitly sets MTU to 0.
|
|
* Assume rollback to default.
|
|
*/
|
|
rt->rt_flags &= ~RTF_FIXEDMTU;
|
|
}
|
|
rt->rt_mtu = info->rti_rmx->rmx_mtu;
|
|
}
|
|
if (info->rti_mflags & RTV_WEIGHT)
|
|
rt->rt_weight = info->rti_rmx->rmx_weight;
|
|
/* Kernel -> userland timebase conversion. */
|
|
if (info->rti_mflags & RTV_EXPIRE)
|
|
rt->rt_expire = info->rti_rmx->rmx_expire ?
|
|
info->rti_rmx->rmx_expire - time_second + time_uptime : 0;
|
|
}
|
|
|
|
int
|
|
rt_setgate(struct rtentry *rt, struct sockaddr *dst, struct sockaddr *gate)
|
|
{
|
|
/* XXX dst may be overwritten, can we move this to below */
|
|
int dlen = SA_SIZE(dst), glen = SA_SIZE(gate);
|
|
|
|
/*
|
|
* Prepare to store the gateway in rt->rt_gateway.
|
|
* Both dst and gateway are stored one after the other in the same
|
|
* malloc'd chunk. If we have room, we can reuse the old buffer,
|
|
* rt_gateway already points to the right place.
|
|
* Otherwise, malloc a new block and update the 'dst' address.
|
|
*/
|
|
if (rt->rt_gateway == NULL || glen > SA_SIZE(rt->rt_gateway)) {
|
|
caddr_t new;
|
|
|
|
R_Malloc(new, caddr_t, dlen + glen);
|
|
if (new == NULL)
|
|
return ENOBUFS;
|
|
/*
|
|
* XXX note, we copy from *dst and not *rt_key(rt) because
|
|
* rt_setgate() can be called to initialize a newly
|
|
* allocated route entry, in which case rt_key(rt) == NULL
|
|
* (and also rt->rt_gateway == NULL).
|
|
* Free()/free() handle a NULL argument just fine.
|
|
*/
|
|
bcopy(dst, new, dlen);
|
|
R_Free(rt_key(rt)); /* free old block, if any */
|
|
rt_key(rt) = (struct sockaddr *)new;
|
|
rt->rt_gateway = (struct sockaddr *)(new + dlen);
|
|
}
|
|
|
|
/*
|
|
* Copy the new gateway value into the memory chunk.
|
|
*/
|
|
bcopy(gate, rt->rt_gateway, glen);
|
|
|
|
return (0);
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
/*
|
|
* Set up a routing table entry, normally
|
|
* for an interface.
|
|
*/
|
|
#define _SOCKADDR_TMPSIZE 128 /* Not too big.. kernel stack size is limited */
|
|
static inline int
|
|
rtinit1(struct ifaddr *ifa, int cmd, int flags, int fibnum)
|
|
{
|
|
RIB_RLOCK_TRACKER;
|
|
struct sockaddr *dst;
|
|
struct sockaddr *netmask;
|
|
struct rtentry *rt = NULL;
|
|
struct rt_addrinfo info;
|
|
int error = 0;
|
|
int startfib, endfib;
|
|
char tempbuf[_SOCKADDR_TMPSIZE];
|
|
int didwork = 0;
|
|
int a_failure = 0;
|
|
struct sockaddr_dl *sdl = NULL;
|
|
struct rib_head *rnh;
|
|
|
|
if (flags & RTF_HOST) {
|
|
dst = ifa->ifa_dstaddr;
|
|
netmask = NULL;
|
|
} else {
|
|
dst = ifa->ifa_addr;
|
|
netmask = ifa->ifa_netmask;
|
|
}
|
|
if (dst->sa_len == 0)
|
|
return(EINVAL);
|
|
switch (dst->sa_family) {
|
|
case AF_INET6:
|
|
case AF_INET:
|
|
/* We support multiple FIBs. */
|
|
break;
|
|
default:
|
|
fibnum = RT_DEFAULT_FIB;
|
|
break;
|
|
}
|
|
if (fibnum == RT_ALL_FIBS) {
|
|
if (V_rt_add_addr_allfibs == 0 && cmd == (int)RTM_ADD)
|
|
startfib = endfib = ifa->ifa_ifp->if_fib;
|
|
else {
|
|
startfib = 0;
|
|
endfib = rt_numfibs - 1;
|
|
}
|
|
} else {
|
|
KASSERT((fibnum < rt_numfibs), ("rtinit1: bad fibnum"));
|
|
startfib = fibnum;
|
|
endfib = fibnum;
|
|
}
|
|
|
|
/*
|
|
* If it's a delete, check that if it exists,
|
|
* it's on the correct interface or we might scrub
|
|
* a route to another ifa which would
|
|
* be confusing at best and possibly worse.
|
|
*/
|
|
if (cmd == RTM_DELETE) {
|
|
/*
|
|
* It's a delete, so it should already exist..
|
|
* If it's a net, mask off the host bits
|
|
* (Assuming we have a mask)
|
|
* XXX this is kinda inet specific..
|
|
*/
|
|
if (netmask != NULL) {
|
|
rt_maskedcopy(dst, (struct sockaddr *)tempbuf, netmask);
|
|
dst = (struct sockaddr *)tempbuf;
|
|
}
|
|
} else if (cmd == RTM_ADD) {
|
|
sdl = (struct sockaddr_dl *)tempbuf;
|
|
bzero(sdl, sizeof(struct sockaddr_dl));
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_len = sizeof(struct sockaddr_dl);
|
|
sdl->sdl_type = ifa->ifa_ifp->if_type;
|
|
sdl->sdl_index = ifa->ifa_ifp->if_index;
|
|
}
|
|
/*
|
|
* Now go through all the requested tables (fibs) and do the
|
|
* requested action. Realistically, this will either be fib 0
|
|
* for protocols that don't do multiple tables or all the
|
|
* tables for those that do.
|
|
*/
|
|
for ( fibnum = startfib; fibnum <= endfib; fibnum++) {
|
|
if (cmd == RTM_DELETE) {
|
|
struct radix_node *rn;
|
|
/*
|
|
* Look up an rtentry that is in the routing tree and
|
|
* contains the correct info.
|
|
*/
|
|
rnh = rt_tables_get_rnh(fibnum, dst->sa_family);
|
|
if (rnh == NULL)
|
|
/* this table doesn't exist but others might */
|
|
continue;
|
|
RIB_RLOCK(rnh);
|
|
rn = rnh->rnh_lookup(dst, netmask, &rnh->head);
|
|
#ifdef RADIX_MPATH
|
|
if (rt_mpath_capable(rnh)) {
|
|
|
|
if (rn == NULL)
|
|
error = ESRCH;
|
|
else {
|
|
rt = RNTORT(rn);
|
|
/*
|
|
* for interface route the
|
|
* rt->rt_gateway is sockaddr_intf
|
|
* for cloning ARP entries, so
|
|
* rt_mpath_matchgate must use the
|
|
* interface address
|
|
*/
|
|
rt = rt_mpath_matchgate(rt,
|
|
ifa->ifa_addr);
|
|
if (rt == NULL)
|
|
error = ESRCH;
|
|
}
|
|
}
|
|
#endif
|
|
error = (rn == NULL ||
|
|
(rn->rn_flags & RNF_ROOT) ||
|
|
RNTORT(rn)->rt_ifa != ifa);
|
|
RIB_RUNLOCK(rnh);
|
|
if (error) {
|
|
/* this is only an error if bad on ALL tables */
|
|
continue;
|
|
}
|
|
}
|
|
/*
|
|
* Do the actual request
|
|
*/
|
|
bzero((caddr_t)&info, sizeof(info));
|
|
ifa_ref(ifa);
|
|
info.rti_ifa = ifa;
|
|
info.rti_flags = flags |
|
|
(ifa->ifa_flags & ~IFA_RTSELF) | RTF_PINNED;
|
|
info.rti_info[RTAX_DST] = dst;
|
|
/*
|
|
* doing this for compatibility reasons
|
|
*/
|
|
if (cmd == RTM_ADD)
|
|
info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)sdl;
|
|
else
|
|
info.rti_info[RTAX_GATEWAY] = ifa->ifa_addr;
|
|
info.rti_info[RTAX_NETMASK] = netmask;
|
|
error = rtrequest1_fib(cmd, &info, &rt, fibnum);
|
|
|
|
if (error == 0 && rt != NULL) {
|
|
/*
|
|
* notify any listening routing agents of the change
|
|
*/
|
|
RT_LOCK(rt);
|
|
#ifdef RADIX_MPATH
|
|
/*
|
|
* in case address alias finds the first address
|
|
* e.g. ifconfig bge0 192.0.2.246/24
|
|
* e.g. ifconfig bge0 192.0.2.247/24
|
|
* the address set in the route is 192.0.2.246
|
|
* so we need to replace it with 192.0.2.247
|
|
*/
|
|
if (memcmp(rt->rt_ifa->ifa_addr,
|
|
ifa->ifa_addr, ifa->ifa_addr->sa_len)) {
|
|
ifa_free(rt->rt_ifa);
|
|
ifa_ref(ifa);
|
|
rt->rt_ifp = ifa->ifa_ifp;
|
|
rt->rt_ifa = ifa;
|
|
}
|
|
#endif
|
|
RT_ADDREF(rt);
|
|
RT_UNLOCK(rt);
|
|
rt_newaddrmsg_fib(cmd, ifa, error, rt, fibnum);
|
|
RT_LOCK(rt);
|
|
RT_REMREF(rt);
|
|
if (cmd == RTM_DELETE) {
|
|
/*
|
|
* If we are deleting, and we found an entry,
|
|
* then it's been removed from the tree..
|
|
* now throw it away.
|
|
*/
|
|
RTFREE_LOCKED(rt);
|
|
} else {
|
|
if (cmd == RTM_ADD) {
|
|
/*
|
|
* We just wanted to add it..
|
|
* we don't actually need a reference.
|
|
*/
|
|
RT_REMREF(rt);
|
|
}
|
|
RT_UNLOCK(rt);
|
|
}
|
|
didwork = 1;
|
|
}
|
|
if (error)
|
|
a_failure = error;
|
|
}
|
|
if (cmd == RTM_DELETE) {
|
|
if (didwork) {
|
|
error = 0;
|
|
} else {
|
|
/* we only give an error if it wasn't in any table */
|
|
error = ((flags & RTF_HOST) ?
|
|
EHOSTUNREACH : ENETUNREACH);
|
|
}
|
|
} else {
|
|
if (a_failure) {
|
|
/* return an error if any of them failed */
|
|
error = a_failure;
|
|
}
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Set up a routing table entry, normally
|
|
* for an interface.
|
|
*/
|
|
int
|
|
rtinit(struct ifaddr *ifa, int cmd, int flags)
|
|
{
|
|
struct sockaddr *dst;
|
|
int fib = RT_DEFAULT_FIB;
|
|
|
|
if (flags & RTF_HOST) {
|
|
dst = ifa->ifa_dstaddr;
|
|
} else {
|
|
dst = ifa->ifa_addr;
|
|
}
|
|
|
|
switch (dst->sa_family) {
|
|
case AF_INET6:
|
|
case AF_INET:
|
|
/* We do support multiple FIBs. */
|
|
fib = RT_ALL_FIBS;
|
|
break;
|
|
}
|
|
return (rtinit1(ifa, cmd, flags, fib));
|
|
}
|
|
|
|
/*
|
|
* Announce interface address arrival/withdraw
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_addrmsg(int cmd, struct ifaddr *ifa, 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));
|
|
|
|
EVENTHANDLER_DIRECT_INVOKE(rt_addrmsg, ifa, cmd);
|
|
return (rtsock_addrmsg(cmd, ifa, fibnum));
|
|
}
|
|
|
|
/*
|
|
* Announce route addition/removal.
|
|
* Users of this function MUST validate input data BEFORE calling.
|
|
* However we have to be able to handle invalid data:
|
|
* if some userland app sends us "invalid" route message (invalid mask,
|
|
* no dst, wrong address families, etc...) we need to pass it back
|
|
* to app (and any other rtsock consumers) with rtm_errno field set to
|
|
* non-zero value.
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_routemsg(int cmd, struct ifnet *ifp, int error, struct rtentry *rt,
|
|
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, ifp, error, rt, fibnum));
|
|
}
|
|
|
|
void
|
|
rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt)
|
|
{
|
|
|
|
rt_newaddrmsg_fib(cmd, ifa, error, rt, RT_ALL_FIBS);
|
|
}
|
|
|
|
/*
|
|
* This is called to generate messages from the routing socket
|
|
* indicating a network interface has had addresses associated with it.
|
|
*/
|
|
void
|
|
rt_newaddrmsg_fib(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt,
|
|
int fibnum)
|
|
{
|
|
|
|
KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE,
|
|
("unexpected cmd %u", cmd));
|
|
KASSERT(fibnum == RT_ALL_FIBS || (fibnum >= 0 && fibnum < rt_numfibs),
|
|
("%s: fib out of range 0 <=%d<%d", __func__, fibnum, rt_numfibs));
|
|
|
|
if (cmd == RTM_ADD) {
|
|
rt_addrmsg(cmd, ifa, fibnum);
|
|
if (rt != NULL)
|
|
rt_routemsg(cmd, ifa->ifa_ifp, error, rt, fibnum);
|
|
} else {
|
|
if (rt != NULL)
|
|
rt_routemsg(cmd, ifa->ifa_ifp, error, rt, fibnum);
|
|
rt_addrmsg(cmd, ifa, fibnum);
|
|
}
|
|
}
|
|
|