#include <machine/rtems-bsd-kernel-space.h>
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $KAME: in6_rmx.c,v 1.11 2001/07/26 06:53:16 jinmei Exp $
*/
/*-
* Copyright 1994, 1995 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/mbuf.h>
#include <sys/rwlock.h>
#include <sys/syslog.h>
#include <sys/callout.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/route.h>
#include <net/route_var.h>
#include <netinet/in.h>
#include <netinet/ip_var.h>
#include <netinet/in_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#include <netinet/icmp6.h>
#include <netinet6/nd6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_seq.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
extern int in6_inithead(void **head, int off);
#ifdef VIMAGE
extern int in6_detachhead(void **head, int off);
#endif
/*
* Do what we need to do when inserting a route.
*/
static struct radix_node *
in6_addroute(void *v_arg, void *n_arg, struct radix_head *head,
struct radix_node *treenodes)
{
struct rtentry *rt = (struct rtentry *)treenodes;
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)rt_key(rt);
if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
rt->rt_flags |= RTF_MULTICAST;
/*
* A little bit of help for both IPv6 output and input:
* For local addresses, we make sure that RTF_LOCAL is set,
* with the thought that this might one day be used to speed up
* ip_input().
*
* We also mark routes to multicast addresses as such, because
* it's easy to do and might be useful (but this is much more
* dubious since it's so easy to inspect the address). (This
* is done above.)
*
* XXX
* should elaborate the code.
*/
if (rt->rt_flags & RTF_HOST) {
if (IN6_ARE_ADDR_EQUAL(&satosin6(rt->rt_ifa->ifa_addr)
->sin6_addr,
&sin6->sin6_addr)) {
rt->rt_flags |= RTF_LOCAL;
}
}
if (rt->rt_ifp != NULL) {
/*
* Check route MTU:
* inherit interface MTU if not set or
* check if MTU is too large.
*/
if (rt->rt_mtu == 0) {
rt->rt_mtu = IN6_LINKMTU(rt->rt_ifp);
} else if (rt->rt_mtu > IN6_LINKMTU(rt->rt_ifp))
rt->rt_mtu = IN6_LINKMTU(rt->rt_ifp);
}
return (rn_addroute(v_arg, n_arg, head, treenodes));
}
/*
* Age old PMTUs.
*/
struct mtuex_arg {
struct rib_head *rnh;
time_t nextstop;
};
VNET_DEFINE_STATIC(struct callout, rtq_mtutimer);
#define V_rtq_mtutimer VNET(rtq_mtutimer)
static int
in6_mtuexpire(struct rtentry *rt, void *rock)
{
struct mtuex_arg *ap = rock;
if (rt->rt_expire && !(rt->rt_flags & RTF_PROBEMTU)) {
if (rt->rt_expire <= time_uptime) {
rt->rt_flags |= RTF_PROBEMTU;
} else {
ap->nextstop = lmin(ap->nextstop, rt->rt_expire);
}
}
return (0);
}
#define MTUTIMO_DEFAULT (60*1)
static void
in6_mtutimo_setwa(struct rib_head *rnh, uint32_t fibum, int af,
void *_arg)
{
struct mtuex_arg *arg;
arg = (struct mtuex_arg *)_arg;
arg->rnh = rnh;
}
static void
in6_mtutimo(void *rock)
{
CURVNET_SET_QUIET((struct vnet *) rock);
struct timeval atv;
struct mtuex_arg arg;
rt_foreach_fib_walk(AF_INET6, in6_mtutimo_setwa, in6_mtuexpire, &arg);
atv.tv_sec = MTUTIMO_DEFAULT;
atv.tv_usec = 0;
callout_reset(&V_rtq_mtutimer, tvtohz(&atv), in6_mtutimo, rock);
CURVNET_RESTORE();
}
/*
* Initialize our routing tree.
*/
VNET_DEFINE_STATIC(int, _in6_rt_was_here);
#define V__in6_rt_was_here VNET(_in6_rt_was_here)
int
in6_inithead(void **head, int off)
{
struct rib_head *rh;
rh = rt_table_init(offsetof(struct sockaddr_in6, sin6_addr) << 3);
if (rh == NULL)
return (0);
rh->rnh_addaddr = in6_addroute;
*head = (void *)rh;
if (V__in6_rt_was_here == 0) {
callout_init(&V_rtq_mtutimer, 1);
in6_mtutimo(curvnet); /* kick off timeout first time */
V__in6_rt_was_here = 1;
}
return (1);
}
#ifdef VIMAGE
int
in6_detachhead(void **head, int off)
{
callout_drain(&V_rtq_mtutimer);
rt_table_destroy((struct rib_head *)(*head));
return (1);
}
#endif
/*
* Extended API for IPv6 FIB support.
*/
void
in6_rtredirect(struct sockaddr *dst, struct sockaddr *gw, struct sockaddr *nm,
int flags, struct sockaddr *src, u_int fibnum)
{
rtredirect_fib(dst, gw, nm, flags, src, fibnum);
}
int
in6_rtrequest(int req, struct sockaddr *dst, struct sockaddr *gw,
struct sockaddr *mask, int flags, struct rtentry **ret_nrt, u_int fibnum)
{
return (rtrequest_fib(req, dst, gw, mask, flags, ret_nrt, fibnum));
}
void
in6_rtalloc(struct route_in6 *ro, u_int fibnum)
{
rtalloc_ign_fib((struct route *)ro, 0ul, fibnum);
}
void
in6_rtalloc_ign(struct route_in6 *ro, u_long ignflags, u_int fibnum)
{
rtalloc_ign_fib((struct route *)ro, ignflags, fibnum);
}
struct rtentry *
in6_rtalloc1(struct sockaddr *dst, int report, u_long ignflags, u_int fibnum)
{
return (rtalloc1_fib(dst, report, ignflags, fibnum));
}
