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 $
40 * @(#)af.c 8.1 (Berkeley) 6/5/93
46 * Address family support routines
49 af_netmatch_t null_netmatch;
50 af_output_t null_output;
51 af_portmatch_t null_portmatch;
52 af_portcheck_t null_portcheck;
53 af_checkhost_t null_checkhost;
54 af_ishost_t null_ishost;
55 af_canon_t null_canon;
57 void ipxnet_hash(struct sockaddr_ipx *, struct afhash *);
58 int ipxnet_netmatch(struct sockaddr_ipx *, struct sockaddr_ipx *);
59 void ipxnet_output(int, int, struct sockaddr_ipx *, int);
60 int ipxnet_portmatch(struct sockaddr_ipx *);
61 int ipxnet_checkhost(struct sockaddr_ipx *);
62 int ipxnet_ishost(struct sockaddr_ipx *);
63 void ipxnet_canon(struct sockaddr_ipx *);
66 { null_hash, null_netmatch, null_output, \
67 null_portmatch, null_portcheck, null_checkhost, \
68 null_ishost, null_canon }
70 { (af_hash_t *)ipxnet_hash, \
71 (af_netmatch_t *)ipxnet_netmatch, \
72 (af_output_t *)ipxnet_output, \
73 (af_portmatch_t *)ipxnet_portmatch, \
74 (af_portcheck_t *)ipxnet_portmatch, \
75 (af_checkhost_t *)ipxnet_checkhost, \
76 (af_ishost_t *)ipxnet_ishost, \
77 (af_canon_t *)ipxnet_canon }
79 struct afswitch afswitch[AF_MAX] =
80 { NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
81 NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
82 NIL, NIL, NIL, IPXNET, NIL, NIL };
84 struct sockaddr_ipx ipxnet_default = {
85 .sipx_len = sizeof(struct sockaddr_ipx),
89 union ipx_net ipx_anynet;
90 union ipx_net ipx_zeronet;
93 ipxnet_hash(struct sockaddr_ipx *sipx, struct afhash *hp)
97 u_short *s = sipx->sipx_addr.x_host.s_host;
101 c = sipx->sipx_addr.x_net.c_net;
105 hash = hash * IMVAL + *c++;
106 hash = hash * IMVAL + *c++;
107 hash = hash * IMVAL + *c++;
108 hash = hash * IMVAL + *c++;
111 hp->afh_nethash = hash;
112 hp->afh_nethash ^= (hash >> 8);
113 hp->afh_nethash ^= (hash >> 16);
114 hp->afh_nethash ^= (hash >> 24);
118 hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
119 hp->afh_hosthash = hash;
124 ipxnet_netmatch(struct sockaddr_ipx *sxn1, struct sockaddr_ipx *sxn2)
126 return (ipx_neteq(sxn1->sipx_addr, sxn2->sipx_addr));
130 * Verify the message is from the right port.
133 ipxnet_portmatch(struct sockaddr_ipx *sipx)
136 return (ntohs(sipx->sipx_addr.x_port) == IPXPORT_RIP );
141 * ipx output routine.
147 ipxnet_output(int s, int flags, struct sockaddr_ipx *sipx, int size)
149 struct sockaddr_ipx dst;
153 if (sipx->sipx_addr.x_port == 0)
154 sipx->sipx_addr.x_port = htons(IPXPORT_RIP);
156 if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST)
159 * Kludge to allow us to get routes out to machines that
160 * don't know their addresses yet; send to that address on
163 if (ipx_neteqnn(sipx->sipx_addr.x_net, ipx_zeronet)) {
164 extern struct interface *ifnet;
165 struct interface *ifp;
167 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
168 sipx->sipx_addr.x_net =
169 satoipx_addr(ifp->int_addr).x_net;
170 sendto(s, msg, size, flags,
171 (struct sockaddr *)sipx, sizeof (*sipx));
176 sendto(s, msg, size, flags,
177 (struct sockaddr *)sipx, sizeof (*sipx));
181 * Return 1 if we want this route.
182 * We use this to disallow route net G entries for one for multiple
183 * point to point links.
186 ipxnet_checkhost(struct sockaddr_ipx *sipx)
188 struct interface *ifp = if_ifwithnet((struct sockaddr *)sipx);
190 * We want this route if there is no more than one
191 * point to point interface with this network.
193 if (ifp == NULL || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1);
194 return (ifp->int_sq.n == ifp->int_sq.p);
198 * Return 1 if the address is
199 * for a host, 0 for a network.
202 ipxnet_ishost(struct sockaddr_ipx *sipx)
204 u_short *s = sipx->sipx_addr.x_host.s_host;
206 if ((s[0]==0x0000) && (s[1]==0x0000) && (s[2]==0x0000))
208 if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff))
215 ipxnet_canon(struct sockaddr_ipx *sipx)
218 sipx->sipx_addr.x_port = 0;
222 null_hash(struct sockaddr *addr, struct afhash *hp)
225 hp->afh_nethash = hp->afh_hosthash = 0;
229 null_netmatch(struct sockaddr *a1, struct sockaddr *a2)
236 null_output(int s, int f, struct sockaddr *a1, int n)
243 null_portmatch(struct sockaddr *a1)
250 null_portcheck(struct sockaddr *a1)
257 null_ishost(struct sockaddr *a1)
264 null_checkhost(struct sockaddr *a1)
271 null_canon(struct sockaddr *a1)