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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $FreeBSD: src/usr.sbin/IPXrouted/af.c,v 1.6 1999/08/28 01:15:01 peter Exp $
36 * @(#)af.c 8.1 (Berkeley) 6/5/93
42 * Address family support routines
45 af_netmatch_t null_netmatch;
46 af_output_t null_output;
47 af_portmatch_t null_portmatch;
48 af_portcheck_t null_portcheck;
49 af_checkhost_t null_checkhost;
50 af_ishost_t null_ishost;
51 af_canon_t null_canon;
53 void ipxnet_hash(struct sockaddr_ipx *, struct afhash *);
54 int ipxnet_netmatch(struct sockaddr_ipx *, struct sockaddr_ipx *);
55 void ipxnet_output(int, int, struct sockaddr_ipx *, int);
56 int ipxnet_portmatch(struct sockaddr_ipx *);
57 int ipxnet_checkhost(struct sockaddr_ipx *);
58 int ipxnet_ishost(struct sockaddr_ipx *);
59 void ipxnet_canon(struct sockaddr_ipx *);
62 { null_hash, null_netmatch, null_output, \
63 null_portmatch, null_portcheck, null_checkhost, \
64 null_ishost, null_canon }
66 { (af_hash_t *)ipxnet_hash, \
67 (af_netmatch_t *)ipxnet_netmatch, \
68 (af_output_t *)ipxnet_output, \
69 (af_portmatch_t *)ipxnet_portmatch, \
70 (af_portcheck_t *)ipxnet_portmatch, \
71 (af_checkhost_t *)ipxnet_checkhost, \
72 (af_ishost_t *)ipxnet_ishost, \
73 (af_canon_t *)ipxnet_canon }
75 struct afswitch afswitch[AF_MAX] =
76 { NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
77 NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
78 NIL, NIL, NIL, IPXNET, NIL, NIL };
80 struct sockaddr_ipx ipxnet_default = {
81 .sipx_len = sizeof(struct sockaddr_ipx),
85 union ipx_net ipx_anynet;
86 union ipx_net ipx_zeronet;
89 ipxnet_hash(struct sockaddr_ipx *sipx, struct afhash *hp)
93 u_short *s = sipx->sipx_addr.x_host.s_host;
97 c = sipx->sipx_addr.x_net.c_net;
101 hash = hash * IMVAL + *c++;
102 hash = hash * IMVAL + *c++;
103 hash = hash * IMVAL + *c++;
104 hash = hash * IMVAL + *c++;
107 hp->afh_nethash = hash;
108 hp->afh_nethash ^= (hash >> 8);
109 hp->afh_nethash ^= (hash >> 16);
110 hp->afh_nethash ^= (hash >> 24);
114 hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
115 hp->afh_hosthash = hash;
120 ipxnet_netmatch(struct sockaddr_ipx *sxn1, struct sockaddr_ipx *sxn2)
122 return (ipx_neteq(sxn1->sipx_addr, sxn2->sipx_addr));
126 * Verify the message is from the right port.
129 ipxnet_portmatch(struct sockaddr_ipx *sipx)
132 return (ntohs(sipx->sipx_addr.x_port) == IPXPORT_RIP );
137 * ipx output routine.
143 ipxnet_output(int s, int flags, struct sockaddr_ipx *sipx, int size)
145 struct sockaddr_ipx dst;
149 if (sipx->sipx_addr.x_port == 0)
150 sipx->sipx_addr.x_port = htons(IPXPORT_RIP);
152 if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST)
155 * Kludge to allow us to get routes out to machines that
156 * don't know their addresses yet; send to that address on
159 if (ipx_neteqnn(sipx->sipx_addr.x_net, ipx_zeronet)) {
160 extern struct interface *ifnet;
161 struct interface *ifp;
163 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
164 sipx->sipx_addr.x_net =
165 satoipx_addr(ifp->int_addr).x_net;
166 sendto(s, msg, size, flags,
167 (struct sockaddr *)sipx, sizeof (*sipx));
172 sendto(s, msg, size, flags,
173 (struct sockaddr *)sipx, sizeof (*sipx));
177 * Return 1 if we want this route.
178 * We use this to disallow route net G entries for one for multiple
179 * point to point links.
182 ipxnet_checkhost(struct sockaddr_ipx *sipx)
184 struct interface *ifp = if_ifwithnet((struct sockaddr *)sipx);
186 * We want this route if there is no more than one
187 * point to point interface with this network.
189 if (ifp == NULL || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1);
190 return (ifp->int_sq.n == ifp->int_sq.p);
194 * Return 1 if the address is
195 * for a host, 0 for a network.
198 ipxnet_ishost(struct sockaddr_ipx *sipx)
200 u_short *s = sipx->sipx_addr.x_host.s_host;
202 if ((s[0]==0x0000) && (s[1]==0x0000) && (s[2]==0x0000))
204 if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff))
211 ipxnet_canon(struct sockaddr_ipx *sipx)
214 sipx->sipx_addr.x_port = 0;
218 null_hash(struct sockaddr *addr, struct afhash *hp)
221 hp->afh_nethash = hp->afh_hosthash = 0;
225 null_netmatch(struct sockaddr *a1, struct sockaddr *a2)
232 null_output(int s, int f, struct sockaddr *a1, int n)
239 null_portmatch(struct sockaddr *a1)
246 null_portcheck(struct sockaddr *a1)
253 null_ishost(struct sockaddr *a1)
260 null_checkhost(struct sockaddr *a1)
267 null_canon(struct sockaddr *a1)