2 * Copyright (c) 1985, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1995 John Hay. All rights reserved.
7 * This file includes significant work done at Cornell University by
8 * Bill Nesheim. That work included by permission.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * $FreeBSD: src/usr.sbin/IPXrouted/af.c,v 1.6 1999/08/28 01:15:01 peter Exp $
42 static char sccsid[] = "@(#)af.c 8.1 (Berkeley) 6/5/93";
48 * Address family support routines
51 af_netmatch_t null_netmatch;
52 af_output_t null_output;
53 af_portmatch_t null_portmatch;
54 af_portcheck_t null_portcheck;
55 af_checkhost_t null_checkhost;
56 af_ishost_t null_ishost;
57 af_canon_t null_canon;
59 void ipxnet_hash(struct sockaddr_ipx *, struct afhash *);
60 int ipxnet_netmatch(struct sockaddr_ipx *, struct sockaddr_ipx *);
61 void ipxnet_output(int, int, struct sockaddr_ipx *, int);
62 int ipxnet_portmatch(struct sockaddr_ipx *);
63 int ipxnet_checkhost(struct sockaddr_ipx *);
64 int ipxnet_ishost(struct sockaddr_ipx *);
65 void ipxnet_canon(struct sockaddr_ipx *);
68 { null_hash, null_netmatch, null_output, \
69 null_portmatch, null_portcheck, null_checkhost, \
70 null_ishost, null_canon }
72 { (af_hash_t *)ipxnet_hash, \
73 (af_netmatch_t *)ipxnet_netmatch, \
74 (af_output_t *)ipxnet_output, \
75 (af_portmatch_t *)ipxnet_portmatch, \
76 (af_portcheck_t *)ipxnet_portmatch, \
77 (af_checkhost_t *)ipxnet_checkhost, \
78 (af_ishost_t *)ipxnet_ishost, \
79 (af_canon_t *)ipxnet_canon }
81 struct afswitch afswitch[AF_MAX] =
82 { NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
83 NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
84 NIL, NIL, NIL, IPXNET, NIL, NIL };
86 struct sockaddr_ipx ipxnet_default = { sizeof(struct sockaddr_ipx), AF_IPX };
88 union ipx_net ipx_anynet;
89 union ipx_net ipx_zeronet;
93 register struct sockaddr_ipx *sipx;
98 u_short *s = sipx->sipx_addr.x_host.s_host;
102 c = sipx->sipx_addr.x_net.c_net;
106 hash = hash * IMVAL + *c++;
107 hash = hash * IMVAL + *c++;
108 hash = hash * IMVAL + *c++;
109 hash = hash * IMVAL + *c++;
112 hp->afh_nethash = hash;
113 hp->afh_nethash ^= (hash >> 8);
114 hp->afh_nethash ^= (hash >> 16);
115 hp->afh_nethash ^= (hash >> 24);
119 hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
120 hp->afh_hosthash = hash;
125 ipxnet_netmatch(sxn1, sxn2)
126 struct sockaddr_ipx *sxn1, *sxn2;
128 return (ipx_neteq(sxn1->sipx_addr, sxn2->sipx_addr));
132 * Verify the message is from the right port.
135 ipxnet_portmatch(sipx)
136 register struct sockaddr_ipx *sipx;
139 return (ntohs(sipx->sipx_addr.x_port) == IPXPORT_RIP );
144 * ipx output routine.
150 ipxnet_output(s, flags, sipx, size)
153 struct sockaddr_ipx *sipx;
156 struct sockaddr_ipx dst;
160 if (sipx->sipx_addr.x_port == 0)
161 sipx->sipx_addr.x_port = htons(IPXPORT_RIP);
163 if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST)
166 * Kludge to allow us to get routes out to machines that
167 * don't know their addresses yet; send to that address on
170 if (ipx_neteqnn(sipx->sipx_addr.x_net, ipx_zeronet)) {
171 extern struct interface *ifnet;
172 register struct interface *ifp;
174 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
175 sipx->sipx_addr.x_net =
176 satoipx_addr(ifp->int_addr).x_net;
177 (void) sendto(s, msg, size, flags,
178 (struct sockaddr *)sipx, sizeof (*sipx));
183 (void) sendto(s, msg, size, flags,
184 (struct sockaddr *)sipx, sizeof (*sipx));
188 * Return 1 if we want this route.
189 * We use this to disallow route net G entries for one for multiple
190 * point to point links.
193 ipxnet_checkhost(sipx)
194 struct sockaddr_ipx *sipx;
196 register struct interface *ifp = if_ifwithnet((struct sockaddr *)sipx);
198 * We want this route if there is no more than one
199 * point to point interface with this network.
201 if (ifp == 0 || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1);
202 return (ifp->int_sq.n == ifp->int_sq.p);
206 * Return 1 if the address is
207 * for a host, 0 for a network.
211 struct sockaddr_ipx *sipx;
213 register u_short *s = sipx->sipx_addr.x_host.s_host;
215 if ((s[0]==0x0000) && (s[1]==0x0000) && (s[2]==0x0000))
217 if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff))
225 struct sockaddr_ipx *sipx;
228 sipx->sipx_addr.x_port = 0;
233 struct sockaddr *addr;
237 hp->afh_nethash = hp->afh_hosthash = 0;
241 null_netmatch(a1, a2)
242 struct sockaddr *a1, *a2;
249 null_output(s, f, a1, n)