2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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31 * $KAME: in6_rmx.c,v 1.11 2001/07/26 06:53:16 jinmei Exp $
35 * Copyright 1994, 1995 Massachusetts Institute of Technology
37 * Permission to use, copy, modify, and distribute this software and
38 * its documentation for any purpose and without fee is hereby
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51 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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57 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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59 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
64 #include <sys/cdefs.h>
65 __FBSDID("$FreeBSD$");
67 #include <sys/param.h>
68 #include <sys/systm.h>
69 #include <sys/kernel.h>
71 #include <sys/queue.h>
72 #include <sys/socket.h>
73 #include <sys/socketvar.h>
75 #include <sys/rwlock.h>
76 #include <sys/syslog.h>
77 #include <sys/callout.h>
80 #include <net/if_var.h>
81 #include <net/route.h>
82 #include <net/route/route_ctl.h>
83 #include <net/route/route_var.h>
84 #include <net/route/nhop.h>
86 #include <netinet/in.h>
87 #include <netinet/ip_var.h>
88 #include <netinet/in_var.h>
90 #include <netinet/ip6.h>
91 #include <netinet6/ip6_var.h>
93 #include <netinet/icmp6.h>
94 #include <netinet6/nd6.h>
97 rib6_preadd(u_int fibnum, const struct sockaddr *addr, const struct sockaddr *mask,
98 struct nhop_object *nh)
106 * inherit interface MTU if not set or
107 * check if MTU is too large.
109 if (nh->nh_mtu == 0) {
110 nh->nh_mtu = IN6_LINKMTU(nh->nh_ifp);
111 } else if (nh->nh_mtu > IN6_LINKMTU(nh->nh_ifp))
112 nh->nh_mtu = IN6_LINKMTU(nh->nh_ifp);
114 /* Ensure that default route nhop has special flag */
115 const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask;
116 if ((nhop_get_rtflags(nh) & RTF_HOST) == 0 && mask6 != NULL &&
117 IN6_IS_ADDR_UNSPECIFIED(&mask6->sin6_addr))
118 nh->nh_flags |= NHF_DEFAULT;
120 /* Set nexthop type */
121 if (nhop_get_type(nh) == 0) {
122 if (nh->nh_flags & NHF_GATEWAY)
123 nh_type = NH_TYPE_IPV6_ETHER_NHOP;
125 nh_type = NH_TYPE_IPV6_ETHER_RSLV;
127 nhop_set_type(nh, nh_type);
134 * Initialize our routing tree.
138 in6_inithead(uint32_t fibnum)
141 struct rib_subscription *rs;
143 rh = rt_table_init(offsetof(struct sockaddr_in6, sin6_addr) << 3,
148 rh->rnh_preadd = rib6_preadd;
150 rs = rib_subscribe_internal(rh, nd6_subscription_cb, NULL,
151 RIB_NOTIFY_IMMEDIATE, true);
152 KASSERT(rs != NULL, ("Unable to subscribe to fib %u\n", fibnum));
159 in6_detachhead(struct rib_head *rh)
162 rt_table_destroy(rh);