172 lines
5.3 KiB
C
172 lines
5.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* 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 project 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 PROJECT 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 PROJECT 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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* $KAME: in6_rmx.c,v 1.11 2001/07/26 06:53:16 jinmei Exp $
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*/
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/*-
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* Copyright 1994, 1995 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/mbuf.h>
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#include <sys/rwlock.h>
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#include <sys/syslog.h>
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#include <sys/callout.h>
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#include <net/if.h>
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#include <net/if_var.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 <netinet/in.h>
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#include <netinet/ip_var.h>
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#include <netinet/in_var.h>
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#include <netinet/ip6.h>
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#include <netinet6/ip6_var.h>
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#include <netinet/icmp6.h>
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#include <netinet6/nd6.h>
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static int
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rib6_set_nh_pfxflags(u_int fibnum, const struct sockaddr *addr, const struct sockaddr *mask,
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struct nhop_object *nh)
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{
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const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *)mask;
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if (mask6 == NULL)
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nhop_set_pxtype_flag(nh, NHF_HOST);
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else if (IN6_IS_ADDR_UNSPECIFIED(&mask6->sin6_addr))
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nhop_set_pxtype_flag(nh, NHF_DEFAULT);
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else
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nhop_set_pxtype_flag(nh, 0);
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return (0);
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}
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static int
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rib6_augment_nh(u_int fibnum, struct nhop_object *nh)
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{
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/*
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* Check route MTU:
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* inherit interface MTU if not set or
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* check if MTU is too large.
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*/
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if (nh->nh_mtu == 0) {
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nh->nh_mtu = IN6_LINKMTU(nh->nh_ifp);
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} else if (nh->nh_mtu > IN6_LINKMTU(nh->nh_ifp))
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nh->nh_mtu = IN6_LINKMTU(nh->nh_ifp);
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/* Set nexthop type */
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if (nhop_get_type(nh) == 0) {
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uint16_t nh_type;
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if (nh->nh_flags & NHF_GATEWAY)
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nh_type = NH_TYPE_IPV6_ETHER_NHOP;
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else
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nh_type = NH_TYPE_IPV6_ETHER_RSLV;
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nhop_set_type(nh, nh_type);
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}
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return (0);
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}
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/*
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* Initialize our routing tree.
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*/
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struct rib_head *
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in6_inithead(uint32_t fibnum)
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{
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struct rib_head *rh;
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struct rib_subscription *rs __diagused;
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rh = rt_table_init(offsetof(struct sockaddr_in6, sin6_addr) << 3,
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AF_INET6, fibnum);
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if (rh == NULL)
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return (NULL);
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rh->rnh_set_nh_pfxflags = rib6_set_nh_pfxflags;
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rh->rnh_augment_nh = rib6_augment_nh;
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rs = rib_subscribe_internal(rh, nd6_subscription_cb, NULL,
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RIB_NOTIFY_IMMEDIATE, true);
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KASSERT(rs != NULL, ("Unable to subscribe to fib %u\n", fibnum));
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return (rh);
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}
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#ifdef VIMAGE
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void
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in6_detachhead(struct rib_head *rh)
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{
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rt_table_destroy(rh);
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}
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#endif
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