231 lines
7.5 KiB
C
231 lines
7.5 KiB
C
/* $NetBSD: rtbl.c,v 1.1 2011/03/31 19:40:52 dyoung Exp $ */
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/*-
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* Copyright (c) 1998, 2008, 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Kevin M. Lahey of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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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/*
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* Copyright (c) 1980, 1986, 1991, 1993
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* The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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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* @(#)route.c 8.3 (Berkeley) 1/9/95
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*/
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#ifdef _KERNEL
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#include "opt_route.h"
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#endif /* _KERNEL */
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rtbl.c,v 1.1 2011/03/31 19:40:52 dyoung Exp $");
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#include <sys/param.h>
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#include <sys/kmem.h>
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#include <sys/sysctl.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/proc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/domain.h>
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#include <sys/protosw.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <sys/pool.h>
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#include <sys/kauth.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/route.h>
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#include <net/raw_cb.h>
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static rtbl_t *rt_tables[AF_MAX+1];
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int
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rt_inithead(rtbl_t **tp, int off)
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{
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rtbl_t *t;
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if (*tp != NULL)
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return 1;
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if ((t = kmem_alloc(sizeof(*t), KM_SLEEP)) == NULL)
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return 0;
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*tp = t;
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return rn_inithead0(&t->t_rnh, off);
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}
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struct rtentry *
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rt_matchaddr(rtbl_t *t, const struct sockaddr *dst)
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{
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struct radix_node_head *rnh = &t->t_rnh;
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struct radix_node *rn;
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rn = rnh->rnh_matchaddr(dst, rnh);
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if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0)
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return NULL;
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return (struct rtentry *)rn;
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}
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int
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rt_addaddr(rtbl_t *t, struct rtentry *rt, const struct sockaddr *netmask)
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{
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struct radix_node_head *rnh = &t->t_rnh;
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struct radix_node *rn;
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rn = rnh->rnh_addaddr(rt_getkey(rt), netmask, rnh, rt->rt_nodes);
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return (rn == NULL) ? EEXIST : 0;
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}
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struct rtentry *
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rt_lookup(rtbl_t *t, const struct sockaddr *dst, const struct sockaddr *netmask)
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{
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struct radix_node_head *rnh = &t->t_rnh;
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struct radix_node *rn;
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rn = rnh->rnh_lookup(dst, netmask, rnh);
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if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0)
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return NULL;
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return (struct rtentry *)rn;
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}
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struct rtentry *
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rt_deladdr(rtbl_t *t, const struct sockaddr *dst,
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const struct sockaddr *netmask)
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{
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struct radix_node_head *rnh = &t->t_rnh;
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struct radix_node *rn;
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if ((rn = rnh->rnh_deladdr(dst, netmask, rnh)) == NULL)
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return NULL;
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if (rn->rn_flags & (RNF_ACTIVE | RNF_ROOT))
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panic("%s", __func__);
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return (struct rtentry *)rn;
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}
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static int
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rt_walktree_visitor(struct radix_node *rn, void *v)
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{
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struct rtwalk *rw = (struct rtwalk *)v;
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return (*rw->rw_f)((struct rtentry *)rn, rw->rw_v);
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}
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int
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rt_walktree(sa_family_t family, int (*f)(struct rtentry *, void *), void *v)
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{
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rtbl_t *t = rt_tables[family];
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struct rtwalk rw;
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if (t == NULL)
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return 0;
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rw.rw_f = f;
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rw.rw_v = v;
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return rn_walktree(&t->t_rnh, rt_walktree_visitor, &rw);
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}
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rtbl_t *
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rt_gettable(sa_family_t af)
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{
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if (af >= __arraycount(rt_tables))
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return NULL;
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return rt_tables[af];
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}
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void
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rtbl_init(void)
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{
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struct domain *dom;
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DOMAIN_FOREACH(dom)
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if (dom->dom_rtattach)
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dom->dom_rtattach(&rt_tables[dom->dom_family],
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dom->dom_rtoffset);
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}
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void
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rt_assert_inactive(const struct rtentry *rt)
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{
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if (rt->rt_nodes->rn_flags & (RNF_ACTIVE | RNF_ROOT))
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panic ("rtfree 2");
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}
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