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295 lines
6.5 KiB
C
295 lines
6.5 KiB
C
/*
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* Copyright (c) 1985, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Copyright (c) 1995 John Hay. All rights reserved.
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*
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* This file includes significant work done at Cornell University by
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* Bill Nesheim. That work included by permission.
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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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* 4. 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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* $FreeBSD$
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*/
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#ifndef lint
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static const char sccsid[] = "@(#)af.c 8.1 (Berkeley) 6/5/93";
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#endif /* not lint */
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#include "defs.h"
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/*
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* Address family support routines
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*/
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af_hash_t null_hash;
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af_netmatch_t null_netmatch;
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af_output_t null_output;
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af_portmatch_t null_portmatch;
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af_portcheck_t null_portcheck;
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af_checkhost_t null_checkhost;
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af_ishost_t null_ishost;
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af_canon_t null_canon;
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void ipxnet_hash(struct sockaddr_ipx *, struct afhash *);
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int ipxnet_netmatch(struct sockaddr_ipx *, struct sockaddr_ipx *);
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void ipxnet_output(int, int, struct sockaddr_ipx *, int);
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int ipxnet_portmatch(struct sockaddr_ipx *);
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int ipxnet_checkhost(struct sockaddr_ipx *);
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int ipxnet_ishost(struct sockaddr_ipx *);
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void ipxnet_canon(struct sockaddr_ipx *);
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#define NIL \
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{ null_hash, null_netmatch, null_output, \
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null_portmatch, null_portcheck, null_checkhost, \
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null_ishost, null_canon }
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#define IPXNET \
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{ (af_hash_t *)ipxnet_hash, \
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(af_netmatch_t *)ipxnet_netmatch, \
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(af_output_t *)ipxnet_output, \
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(af_portmatch_t *)ipxnet_portmatch, \
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(af_portcheck_t *)ipxnet_portmatch, \
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(af_checkhost_t *)ipxnet_checkhost, \
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(af_ishost_t *)ipxnet_ishost, \
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(af_canon_t *)ipxnet_canon }
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struct afswitch afswitch[AF_MAX] =
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{ NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
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NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
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NIL, NIL, NIL, IPXNET, NIL, NIL };
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struct sockaddr_ipx ipxnet_default = { sizeof(struct sockaddr_ipx), AF_IPX };
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union ipx_net ipx_anynet;
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union ipx_net ipx_zeronet;
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void
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ipxnet_hash(sipx, hp)
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register struct sockaddr_ipx *sipx;
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struct afhash *hp;
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{
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long hash;
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#if 0
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u_short *s = sipx->sipx_addr.x_host.s_host;
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#endif
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u_char *c;
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c = sipx->sipx_addr.x_net.c_net;
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#define IMVAL 33
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hash = 0;
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hash = hash * IMVAL + *c++;
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hash = hash * IMVAL + *c++;
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hash = hash * IMVAL + *c++;
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hash = hash * IMVAL + *c++;
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#undef IMVAL
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hp->afh_nethash = hash;
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hp->afh_nethash ^= (hash >> 8);
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hp->afh_nethash ^= (hash >> 16);
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hp->afh_nethash ^= (hash >> 24);
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#if 0
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hash = 0;
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hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
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hp->afh_hosthash = hash;
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#endif
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}
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int
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ipxnet_netmatch(sxn1, sxn2)
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struct sockaddr_ipx *sxn1, *sxn2;
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{
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return (ipx_neteq(sxn1->sipx_addr, sxn2->sipx_addr));
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}
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/*
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* Verify the message is from the right port.
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*/
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int
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ipxnet_portmatch(sipx)
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register struct sockaddr_ipx *sipx;
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{
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return (ntohs(sipx->sipx_addr.x_port) == IPXPORT_RIP );
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}
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/*
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* ipx output routine.
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*/
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#ifdef DEBUG
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int do_output = 0;
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#endif
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void
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ipxnet_output(s, flags, sipx, size)
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int s;
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int flags;
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struct sockaddr_ipx *sipx;
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int size;
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{
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struct sockaddr_ipx dst;
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dst = *sipx;
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sipx = &dst;
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if (sipx->sipx_addr.x_port == 0)
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sipx->sipx_addr.x_port = htons(IPXPORT_RIP);
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#ifdef DEBUG
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if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST)
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#endif
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/*
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* Kludge to allow us to get routes out to machines that
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* don't know their addresses yet; send to that address on
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* ALL connected nets
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*/
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if (ipx_neteqnn(sipx->sipx_addr.x_net, ipx_zeronet)) {
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extern struct interface *ifnet;
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register struct interface *ifp;
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for (ifp = ifnet; ifp; ifp = ifp->int_next) {
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sipx->sipx_addr.x_net =
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satoipx_addr(ifp->int_addr).x_net;
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(void) sendto(s, msg, size, flags,
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(struct sockaddr *)sipx, sizeof (*sipx));
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}
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return;
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}
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(void) sendto(s, msg, size, flags,
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(struct sockaddr *)sipx, sizeof (*sipx));
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}
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/*
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* Return 1 if we want this route.
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* We use this to disallow route net G entries for one for multiple
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* point to point links.
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*/
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int
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ipxnet_checkhost(sipx)
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struct sockaddr_ipx *sipx;
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{
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register struct interface *ifp = if_ifwithnet((struct sockaddr *)sipx);
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/*
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* We want this route if there is no more than one
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* point to point interface with this network.
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*/
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if (ifp == 0 || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1);
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return (ifp->int_sq.n == ifp->int_sq.p);
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}
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/*
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* Return 1 if the address is
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* for a host, 0 for a network.
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*/
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int
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ipxnet_ishost(sipx)
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struct sockaddr_ipx *sipx;
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{
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register u_short *s = sipx->sipx_addr.x_host.s_host;
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if ((s[0]==0x0000) && (s[1]==0x0000) && (s[2]==0x0000))
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return (0);
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if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff))
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return (0);
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return (1);
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}
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void
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ipxnet_canon(sipx)
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struct sockaddr_ipx *sipx;
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{
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sipx->sipx_addr.x_port = 0;
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}
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void
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null_hash(addr, hp)
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struct sockaddr *addr;
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struct afhash *hp;
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{
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hp->afh_nethash = hp->afh_hosthash = 0;
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}
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int
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null_netmatch(a1, a2)
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struct sockaddr *a1, *a2;
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{
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return (0);
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}
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void
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null_output(s, f, a1, n)
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int s;
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int f;
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struct sockaddr *a1;
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int n;
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{
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;
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}
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int
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null_portmatch(a1)
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struct sockaddr *a1;
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{
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return (0);
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}
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int
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null_portcheck(a1)
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struct sockaddr *a1;
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{
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return (0);
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}
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int
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null_ishost(a1)
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struct sockaddr *a1;
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{
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return (0);
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}
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int
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null_checkhost(a1)
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struct sockaddr *a1;
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{
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return (0);
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}
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void
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null_canon(a1)
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struct sockaddr *a1;
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{
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;
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}
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