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/* $NetBSD: rtbl.c,v 1.7 2017/06/01 02:45:14 chs Exp $ */
/*-
* Copyright (c) 1998, 2008, 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Kevin M. Lahey of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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.
*/
/*
* Copyright (c) 1980, 1986, 1991, 1993
* The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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.
*
* @(#)route.c 8.3 (Berkeley) 1/9/95
*/
#if defined(_KERNEL) && defined(_KERNEL_OPT)
#include "opt_route.h"
#endif /* _KERNEL && _KERNEL_OPT */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rtbl.c,v 1.7 2017/06/01 02:45:14 chs Exp $");
#include <sys/param.h>
#include <sys/kmem.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/domain.h>
#include <sys/kernel.h>
#include <sys/ioctl.h>
#include <sys/pool.h>
#include <sys/kauth.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/raw_cb.h>
static rtbl_t *rt_tables[AF_MAX+1];
int
rt_inithead(rtbl_t **tp, int off)
{
rtbl_t *t;
if (*tp != NULL)
return 1;
t = kmem_alloc(sizeof(*t), KM_SLEEP);
*tp = t;
return rn_inithead0(&t->t_rnh, off);
}
struct rtentry *
rt_matchaddr(rtbl_t *t, const struct sockaddr *dst)
{
struct radix_node_head *rnh = &t->t_rnh;
struct radix_node *rn;
rn = rnh->rnh_matchaddr(dst, rnh);
if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0)
return NULL;
return (struct rtentry *)rn;
}
int
rt_addaddr(rtbl_t *t, struct rtentry *rt, const struct sockaddr *netmask)
{
struct radix_node_head *rnh = &t->t_rnh;
struct radix_node *rn;
rn = rnh->rnh_addaddr(rt_getkey(rt), netmask, rnh, rt->rt_nodes);
return (rn == NULL) ? EEXIST : 0;
}
struct rtentry *
rt_lookup(rtbl_t *t, const struct sockaddr *dst, const struct sockaddr *netmask)
{
struct radix_node_head *rnh = &t->t_rnh;
struct radix_node *rn;
rn = rnh->rnh_lookup(dst, netmask, rnh);
if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0)
return NULL;
return (struct rtentry *)rn;
}
struct rtentry *
rt_deladdr(rtbl_t *t, const struct sockaddr *dst,
const struct sockaddr *netmask)
{
struct radix_node_head *rnh = &t->t_rnh;
struct radix_node *rn;
if ((rn = rnh->rnh_deladdr(dst, netmask, rnh)) == NULL)
return NULL;
if (rn->rn_flags & (RNF_ACTIVE | RNF_ROOT))
panic("%s", __func__);
return (struct rtentry *)rn;
}
static int
rt_walktree_visitor(struct radix_node *rn, void *v)
{
struct rtwalk *rw = (struct rtwalk *)v;
return (*rw->rw_f)((struct rtentry *)rn, rw->rw_v);
}
int
rtbl_walktree(sa_family_t family, int (*f)(struct rtentry *, void *), void *v)
{
rtbl_t *t = rt_tables[family];
struct rtwalk rw;
if (t == NULL)
return 0;
rw.rw_f = f;
rw.rw_v = v;
return rn_walktree(&t->t_rnh, rt_walktree_visitor, &rw);
}
struct rtentry *
rtbl_search_matched_entry(sa_family_t family,
int (*f)(struct rtentry *, void *), void *v)
{
rtbl_t *t = rt_tables[family];
struct rtwalk rw;
if (t == NULL)
return 0;
rw.rw_f = f;
rw.rw_v = v;
return (struct rtentry *)
rn_search_matched(&t->t_rnh, rt_walktree_visitor, &rw);
}
rtbl_t *
rt_gettable(sa_family_t af)
{
if (af >= __arraycount(rt_tables))
return NULL;
return rt_tables[af];
}
void
rtbl_init(void)
{
struct domain *dom;
DOMAIN_FOREACH(dom)
if (dom->dom_rtattach)
dom->dom_rtattach(&rt_tables[dom->dom_family],
dom->dom_rtoffset);
}
void
rt_assert_inactive(const struct rtentry *rt)
{
if (rt->rt_nodes->rn_flags & (RNF_ACTIVE | RNF_ROOT))
panic ("rtfree 2");
}
int
rt_refines(const struct sockaddr *m_sa, const struct sockaddr *n_sa)
{
return rn_refines(m_sa, n_sa);
}
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