2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2020 Alexander V. Chernikov
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include "opt_inet6.h"
32 #include "opt_route.h"
34 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
39 #include <sys/socket.h>
40 #include <sys/sysctl.h>
41 #include <sys/syslog.h>
42 #include <sys/sysproto.h>
44 #include <sys/domain.h>
45 #include <sys/kernel.h>
47 #include <sys/rmlock.h>
50 #include <net/if_var.h>
51 #include <net/if_dl.h>
52 #include <net/route.h>
53 #include <net/route/route_ctl.h>
54 #include <net/route/route_var.h>
55 #include <net/route/nhop_utils.h>
56 #include <net/route/nhop.h>
57 #include <net/route/nhop_var.h>
58 #include <net/route/shared.h>
60 #include <netinet/in_fib.h>
63 #include <netinet6/in6_fib.h>
68 * RIB helper functions.
72 * Calls @wa_f with @arg for each entry in the table specified by
75 * Table is traversed under read lock.
78 rib_walk(int af, u_int fibnum, rt_walktree_f_t *wa_f, void *arg)
83 if ((rnh = rt_tables_get_rnh(fibnum, af)) == NULL)
87 rnh->rnh_walktree(&rnh->head, (walktree_f_t *)wa_f, arg);
92 * Wrapper for the control plane functions for performing af-agnostic
94 * @fibnum: fib to perform the lookup.
95 * @dst: sockaddr with family and addr filled in. IPv6 addresses needs to be in
97 * @flags: fib(9) flags.
98 * @flowid: flow id for path selection in multipath use case.
100 * Returns nhop_object or NULL.
102 * Requires NET_EPOCH.
106 rib_lookup(uint32_t fibnum, const struct sockaddr *dst, uint32_t flags,
109 struct nhop_object *nh;
113 switch (dst->sa_family) {
117 const struct sockaddr_in *a = (const struct sockaddr_in *)dst;
118 nh = fib4_lookup(fibnum, a->sin_addr, 0, flags, flowid);
125 const struct sockaddr_in6 *a = (const struct sockaddr_in6*)dst;
126 nh = fib6_lookup(fibnum, &a->sin6_addr, a->sin6_scope_id,