Subscriptions are planned to be used by modules such as route lookup engines. In that case that's the module task to properly unsibscribe before detach. However, the in-kernel customer - inet6 wants to track default route changes. To avoid having inet6 store per-fib subscriptions, handle automatic destruction internally. Differential Revision: https://reviews.freebsd.org/D25614
1539 lines
37 KiB
C
1539 lines
37 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/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/route/shared.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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/*
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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_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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VNET_DEFINE(struct rib_head *, rt_tables);
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#define V_rt_tables VNET(rt_tables)
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|
|
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VNET_DEFINE(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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|
|
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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 void destroy_rtentry_epoch(epoch_context_t ctx);
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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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|
|
/*
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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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|
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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,
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CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
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&sysctl_my_fibnum, "I",
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"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,
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("%s: table out of bounds (0 <= %d < %d)", __func__, table,
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rt_numfibs));
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KASSERT(fam >= 0 && fam < (AF_MAX + 1),
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("%s: fam out of bounds (0 <= %d < %d)", __func__, fam, AF_MAX+1));
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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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|
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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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|
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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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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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|
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_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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}
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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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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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|
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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, table);
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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;
|
|
struct domain *dom;
|
|
struct rib_head **rnh;
|
|
|
|
for (dom = domains; dom; dom = dom->dom_next) {
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if (dom->dom_rtdetach == NULL)
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continue;
|
|
|
|
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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|
* dom_rtdetach calls rt_table_destroy(), which
|
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* schedules deletion for all rtentries, nexthops and control
|
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* structures. Wait for the destruction callbacks to fire.
|
|
* Note that this should result in freeing all rtentries, but
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* nexthops deletions will be scheduled for the next epoch run
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* and will be completed after vnet teardown.
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*/
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epoch_drain_callbacks(net_epoch_preempt);
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|
|
|
free(V_rt_tables, M_RTABLE);
|
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uma_zdestroy(V_rtzone);
|
|
}
|
|
VNET_SYSUNINIT(vnet_route_uninit, SI_SUB_PROTO_DOMAIN, SI_ORDER_FIRST,
|
|
vnet_route_uninit, 0);
|
|
#endif
|
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|
|
struct rib_head *
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rt_table_init(int offset, int family, u_int fibnum)
|
|
{
|
|
struct rib_head *rh;
|
|
|
|
rh = malloc(sizeof(struct rib_head), M_RTABLE, M_WAITOK | M_ZERO);
|
|
|
|
/* 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;
|
|
|
|
/* Save metadata associated with this routing table. */
|
|
rh->rib_family = family;
|
|
rh->rib_fibnum = fibnum;
|
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#ifdef VIMAGE
|
|
rh->rib_vnet = curvnet;
|
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#endif
|
|
|
|
tmproutes_init(rh);
|
|
|
|
/* Init locks */
|
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RIB_LOCK_INIT(rh);
|
|
|
|
nhops_init_rib(rh);
|
|
|
|
/* Init subscription system */
|
|
rib_init_subscriptions(rh);
|
|
|
|
/* Finally, set base callbacks */
|
|
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;
|
|
rh->rnh_walktree_from = rn_walktree_from;
|
|
|
|
return (rh);
|
|
}
|
|
|
|
static int
|
|
rt_freeentry(struct radix_node *rn, void *arg)
|
|
{
|
|
struct radix_head * const rnh = arg;
|
|
struct radix_node *x;
|
|
|
|
x = (struct radix_node *)rn_delete(rn + 2, NULL, rnh);
|
|
if (x != NULL)
|
|
R_Free(x);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
rt_table_destroy(struct rib_head *rh)
|
|
{
|
|
|
|
tmproutes_destroy(rh);
|
|
|
|
rn_walktree(&rh->rmhead.head, rt_freeentry, &rh->rmhead.head);
|
|
|
|
nhops_destroy_rib(rh);
|
|
|
|
rib_destroy_subscriptions(rh);
|
|
|
|
/* Assume table is already empty */
|
|
RIB_LOCK_DESTROY(rh);
|
|
free(rh, M_RTABLE);
|
|
}
|
|
|
|
|
|
#ifndef _SYS_SYSPROTO_H_
|
|
struct setfib_args {
|
|
int fibnum;
|
|
};
|
|
#endif
|
|
int
|
|
sys_setfib(struct thread *td, struct setfib_args *uap)
|
|
{
|
|
if (uap->fibnum < 0 || uap->fibnum >= rt_numfibs)
|
|
return EINVAL;
|
|
td->td_proc->p_fibnum = uap->fibnum;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Remove a reference count from an rtentry.
|
|
* If the count gets low enough, take it out of the routing table
|
|
*/
|
|
void
|
|
rtfree(struct rtentry *rt)
|
|
{
|
|
|
|
KASSERT(rt != NULL,("%s: NULL rt", __func__));
|
|
|
|
RT_LOCK_ASSERT(rt);
|
|
|
|
RT_UNLOCK(rt);
|
|
epoch_call(net_epoch_preempt, destroy_rtentry_epoch,
|
|
&rt->rt_epoch_ctx);
|
|
}
|
|
|
|
static void
|
|
destroy_rtentry(struct rtentry *rt)
|
|
{
|
|
|
|
/*
|
|
* At this moment rnh, nh_control may be already freed.
|
|
* nhop interface may have been migrated to a different vnet.
|
|
* Use vnet stored in the nexthop to delete the entry.
|
|
*/
|
|
CURVNET_SET(nhop_get_vnet(rt->rt_nhop));
|
|
|
|
/* Unreference nexthop */
|
|
nhop_free(rt->rt_nhop);
|
|
|
|
uma_zfree(V_rtzone, rt);
|
|
|
|
CURVNET_RESTORE();
|
|
}
|
|
|
|
/*
|
|
* Epoch callback indicating rtentry is safe to destroy
|
|
*/
|
|
static void
|
|
destroy_rtentry_epoch(epoch_context_t ctx)
|
|
{
|
|
struct rtentry *rt;
|
|
|
|
rt = __containerof(ctx, struct rtentry, rt_epoch_ctx);
|
|
|
|
destroy_rtentry(rt);
|
|
}
|
|
|
|
/*
|
|
* Adds a temporal redirect entry to the routing table.
|
|
* @fibnum: fib number
|
|
* @dst: destination to install redirect to
|
|
* @gateway: gateway to go via
|
|
* @author: sockaddr of originating router, can be NULL
|
|
* @ifp: interface to use for the redirected route
|
|
* @flags: set of flags to add. Allowed: RTF_GATEWAY
|
|
* @lifetime_sec: time in seconds to expire this redirect.
|
|
*
|
|
* Retuns 0 on success, errno otherwise.
|
|
*/
|
|
int
|
|
rib_add_redirect(u_int fibnum, struct sockaddr *dst, struct sockaddr *gateway,
|
|
struct sockaddr *author, struct ifnet *ifp, int flags, int lifetime_sec)
|
|
{
|
|
struct rtentry *rt;
|
|
int error;
|
|
struct rt_addrinfo info;
|
|
struct rt_metrics rti_rmx;
|
|
struct ifaddr *ifa;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
|
|
if (rt_tables_get_rnh(fibnum, dst->sa_family) == NULL)
|
|
return (EAFNOSUPPORT);
|
|
|
|
/* Verify the allowed flag mask. */
|
|
KASSERT(((flags & ~(RTF_GATEWAY)) == 0),
|
|
("invalid redirect flags: %x", flags));
|
|
|
|
/* Get the best ifa for the given interface and gateway. */
|
|
if ((ifa = ifaof_ifpforaddr(gateway, ifp)) == NULL)
|
|
return (ENETUNREACH);
|
|
ifa_ref(ifa);
|
|
|
|
bzero(&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = dst;
|
|
info.rti_info[RTAX_GATEWAY] = gateway;
|
|
info.rti_ifa = ifa;
|
|
info.rti_ifp = ifp;
|
|
info.rti_flags = flags | RTF_HOST | RTF_DYNAMIC;
|
|
|
|
/* Setup route metrics to define expire time. */
|
|
bzero(&rti_rmx, sizeof(rti_rmx));
|
|
/* Set expire time as absolute. */
|
|
rti_rmx.rmx_expire = lifetime_sec + time_second;
|
|
info.rti_mflags |= RTV_EXPIRE;
|
|
info.rti_rmx = &rti_rmx;
|
|
|
|
error = rtrequest1_fib(RTM_ADD, &info, &rt, fibnum);
|
|
ifa_free(ifa);
|
|
|
|
if (error != 0) {
|
|
/* TODO: add per-fib redirect stats. */
|
|
return (error);
|
|
}
|
|
|
|
RT_LOCK(rt);
|
|
flags = rt->rt_flags;
|
|
RT_UNLOCK(rt);
|
|
|
|
RTSTAT_INC(rts_dynamic);
|
|
|
|
/* Send notification of a route addition to userland. */
|
|
bzero(&info, sizeof(info));
|
|
info.rti_info[RTAX_DST] = dst;
|
|
info.rti_info[RTAX_GATEWAY] = gateway;
|
|
info.rti_info[RTAX_AUTHOR] = author;
|
|
rt_missmsg_fib(RTM_REDIRECT, &info, flags, error, fibnum);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
const struct sockaddr *gateway, u_int fibnum)
|
|
{
|
|
struct ifaddr *ifa;
|
|
|
|
NET_EPOCH_ASSERT();
|
|
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 nhop_object *nh;
|
|
|
|
nh = rib_lookup(fibnum, gateway, NHR_NONE, 0);
|
|
|
|
/*
|
|
* dismiss a gateway that is reachable only
|
|
* through the default router
|
|
*/
|
|
if ((nh == NULL) || (nh->nh_flags & NHF_DEFAULT))
|
|
return (NULL);
|
|
ifa = nh->nh_ifa;
|
|
}
|
|
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;
|
|
}
|
|
|
|
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 and rt_ifa.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_exportinfo(struct rtentry *rt, struct rt_addrinfo *info, int flags)
|
|
{
|
|
struct rt_metrics *rmx;
|
|
struct sockaddr *src, *dst;
|
|
struct nhop_object *nh;
|
|
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_nhop->gw_sa;
|
|
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_nhop->gw_sa;
|
|
info->rti_addrs |= RTA_GATEWAY;
|
|
}
|
|
}
|
|
|
|
nh = rt->rt_nhop;
|
|
rmx = info->rti_rmx;
|
|
if (rmx != NULL) {
|
|
info->rti_mflags |= RTV_MTU;
|
|
rmx->rmx_mtu = nh->nh_mtu;
|
|
}
|
|
|
|
info->rti_flags = rt->rt_flags | nhop_get_rtflags(nh);
|
|
info->rti_ifp = nh->nh_ifp;
|
|
info->rti_ifa = nh->nh_ifa;
|
|
if (flags & NHR_REF) {
|
|
if_ref(info->rti_ifp);
|
|
ifa_ref(info->rti_ifa);
|
|
}
|
|
|
|
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 and rt_ifa.
|
|
* 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_nhop->nh_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)
|
|
{
|
|
|
|
ifa_free(info->rti_ifa);
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Iterates over all existing fibs in system and deletes each element
|
|
* for which @filter_f function returns non-zero value.
|
|
* If @family is not AF_UNSPEC, iterates over fibs in particular
|
|
* address family.
|
|
*/
|
|
void
|
|
rt_foreach_fib_walk_del(int family, rt_filter_f_t *filter_f, void *arg)
|
|
{
|
|
u_int fibnum;
|
|
int i, start, end;
|
|
|
|
for (fibnum = 0; fibnum < rt_numfibs; fibnum++) {
|
|
/* Do we want some specific family? */
|
|
if (family != AF_UNSPEC) {
|
|
start = family;
|
|
end = family;
|
|
} else {
|
|
start = 1;
|
|
end = AF_MAX;
|
|
}
|
|
|
|
for (i = start; i <= end; i++) {
|
|
if (rt_tables_get_rnh(fibnum, i) == NULL)
|
|
continue;
|
|
|
|
rib_walk_del(fibnum, i, filter_f, arg, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
* nh pointer to nhop
|
|
* arg argument passed to rnh->rnh_walktree() - detaching interface
|
|
*
|
|
* Returns:
|
|
* 0 successful
|
|
* errno failed - reason indicated
|
|
*/
|
|
static int
|
|
rt_ifdelroute(const struct rtentry *rt, const struct nhop_object *nh, void *arg)
|
|
{
|
|
struct ifnet *ifp = arg;
|
|
|
|
if (nh->nh_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);
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
const struct sockaddr *dst, *gateway, *ifpaddr, *ifaaddr;
|
|
struct epoch_tracker et;
|
|
int needref, error, flags;
|
|
|
|
dst = info->rti_info[RTAX_DST];
|
|
gateway = info->rti_info[RTAX_GATEWAY];
|
|
ifpaddr = info->rti_info[RTAX_IFP];
|
|
ifaaddr = info->rti_info[RTAX_IFA];
|
|
flags = info->rti_flags;
|
|
|
|
/*
|
|
* 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(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) {
|
|
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 (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);
|
|
}
|
|
|
|
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
|
|
|
|
#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.
|
|
*/
|
|
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_nhop->gw_sa.sa_len != gw->sa_len ||
|
|
memcmp(&rt->rt_nhop->gw_sa, gw, gw->sa_len))) {
|
|
*perror = ESRCH;
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* use the normal delete code to remove
|
|
* the first entry
|
|
*/
|
|
rn = rnh->rnh_deladdr(info->rti_info[RTAX_DST],
|
|
info->rti_info[RTAX_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)
|
|
{
|
|
const struct sockaddr *dst;
|
|
struct rib_head *rnh;
|
|
struct rib_cmd_info rc;
|
|
int error;
|
|
|
|
KASSERT((fibnum < rt_numfibs), ("rtrequest1_fib: bad fibnum"));
|
|
KASSERT((info->rti_flags & RTF_RNH_LOCKED) == 0, ("rtrequest1_fib: locked"));
|
|
NET_EPOCH_ASSERT();
|
|
|
|
dst = info->rti_info[RTAX_DST];
|
|
|
|
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 (info->rti_flags & RTF_HOST)
|
|
info->rti_info[RTAX_NETMASK] = NULL;
|
|
|
|
bzero(&rc, sizeof(struct rib_cmd_info));
|
|
error = 0;
|
|
switch (req) {
|
|
case RTM_DELETE:
|
|
error = del_route(rnh, info, &rc);
|
|
break;
|
|
case RTM_RESOLVE:
|
|
/*
|
|
* resolve was only used for route cloning
|
|
* here for compat
|
|
*/
|
|
break;
|
|
case RTM_ADD:
|
|
error = add_route(rnh, info, &rc);
|
|
break;
|
|
case RTM_CHANGE:
|
|
error = change_route(rnh, info, &rc);
|
|
break;
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
}
|
|
|
|
if (ret_nrt != NULL)
|
|
*ret_nrt = rc.rc_rt;
|
|
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
rt_setmetrics(const struct rt_addrinfo *info, struct rtentry *rt)
|
|
{
|
|
|
|
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;
|
|
}
|
|
|
|
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 epoch_tracker et;
|
|
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_short *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_short *)tempbuf;
|
|
bzero(sdl, sizeof(struct sockaddr_dl_short));
|
|
sdl->sdl_family = AF_LINK;
|
|
sdl->sdl_len = sizeof(struct sockaddr_dl_short);
|
|
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 gateway
|
|
* gateway is sockaddr_dl, 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_nhop->nh_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));
|
|
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;
|
|
NET_EPOCH_ENTER(et);
|
|
error = rtrequest1_fib(cmd, &info, &rt, fibnum);
|
|
if (error == 0 && rt != NULL) {
|
|
/*
|
|
* notify any listening routing agents of the change
|
|
*/
|
|
|
|
/* TODO: interface routes/aliases */
|
|
rt_newaddrmsg_fib(cmd, ifa, rt, fibnum);
|
|
didwork = 1;
|
|
}
|
|
NET_EPOCH_EXIT(et);
|
|
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 kernel-originated route addition/removal to rtsock based on @rt data.
|
|
* cmd: RTM_ cmd
|
|
* @rt: valid rtentry
|
|
* @ifp: target route interface
|
|
* @fibnum: fib id or RT_ALL_FIBS
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
int
|
|
rt_routemsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int rti_addrs,
|
|
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, ifp, 0, 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));
|
|
}
|
|
|
|
|
|
/*
|
|
* 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, 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, rt, ifa->ifa_ifp, 0, fibnum);
|
|
} else {
|
|
if (rt != NULL)
|
|
rt_routemsg(cmd, rt, ifa->ifa_ifp, 0, fibnum);
|
|
rt_addrmsg(cmd, ifa, fibnum);
|
|
}
|
|
}
|
|
|