aboutsummaryrefslogtreecommitdiff
path: root/usr.sbin/IPXrouted/af.c
blob: 74455dfe39e93a2da73173629f02f3562572e953 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
/*
 * Copyright (c) 1985, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Copyright (c) 1995 John Hay.  All rights reserved.
 *
 * This file includes significant work done at Cornell University by
 * Bill Nesheim.  That work included by permission.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef lint
static char sccsid[] = "@(#)af.c	8.1 (Berkeley) 6/5/93";
#endif /* not lint */

#include "defs.h"

/*
 * Address family support routines
 */
af_hash_t	null_hash;
af_netmatch_t	null_netmatch;
af_output_t	null_output;
af_portmatch_t	null_portmatch;
af_portcheck_t	null_portcheck;
af_checkhost_t	null_checkhost;
af_ishost_t	null_ishost;
af_canon_t	null_canon;

void	ipxnet_hash(struct sockaddr_ipx *, struct afhash *);
int	ipxnet_netmatch(struct sockaddr_ipx *, struct sockaddr_ipx *);
void	ipxnet_output(int, int, struct sockaddr_ipx *, int);
int	ipxnet_portmatch(struct sockaddr_ipx *);
int	ipxnet_checkhost(struct sockaddr_ipx *);
int	ipxnet_ishost(struct sockaddr_ipx *);
void	ipxnet_canon(struct sockaddr_ipx *);

#define NIL \
	{ null_hash,		null_netmatch,		null_output, \
	  null_portmatch,	null_portcheck,		null_checkhost, \
	  null_ishost,		null_canon }
#define	IPXNET \
	{ (af_hash_t *)ipxnet_hash, \
	  (af_netmatch_t *)ipxnet_netmatch, \
	  (af_output_t *)ipxnet_output, \
	  (af_portmatch_t *)ipxnet_portmatch, \
	  (af_portcheck_t *)ipxnet_portmatch, \
	  (af_checkhost_t *)ipxnet_checkhost, \
	  (af_ishost_t *)ipxnet_ishost, \
	  (af_canon_t *)ipxnet_canon }

struct afswitch afswitch[AF_MAX] =
	{ NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
	  NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL, NIL,
	  NIL, NIL, NIL, IPXNET, NIL, NIL };

struct sockaddr_ipx ipxnet_default = { sizeof(struct sockaddr_ipx), AF_IPX };

union ipx_net ipx_anynet;
union ipx_net ipx_zeronet;

void
ipxnet_hash(sipx, hp)
	register struct sockaddr_ipx *sipx;
	struct afhash *hp;
{
	long hash;
#if 0
	u_short *s = sipx->sipx_addr.x_host.s_host;
#endif
	u_char *c;

	c = sipx->sipx_addr.x_net.c_net;

#define IMVAL	33
	hash = 0;
	hash = hash * IMVAL + *c++;
	hash = hash * IMVAL + *c++;
	hash = hash * IMVAL + *c++;
	hash = hash * IMVAL + *c++;
#undef IMVAL

	hp->afh_nethash = hash;
	hp->afh_nethash ^= (hash >> 8);
	hp->afh_nethash ^= (hash >> 16);
	hp->afh_nethash ^= (hash >> 24);

#if 0
	hash = 0;
	hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
	hp->afh_hosthash = hash;
#endif
}

int
ipxnet_netmatch(sxn1, sxn2)
	struct sockaddr_ipx *sxn1, *sxn2;
{
	return (ipx_neteq(sxn1->sipx_addr, sxn2->sipx_addr));
}

/*
 * Verify the message is from the right port.
 */
int
ipxnet_portmatch(sipx)
	register struct sockaddr_ipx *sipx;
{
	
	return (ntohs(sipx->sipx_addr.x_port) == IPXPORT_RIP );
}


/*
 * ipx output routine.
 */
#ifdef DEBUG
int do_output = 0;
#endif
void
ipxnet_output(s, flags, sipx, size)
	int s;
	int flags;
	struct sockaddr_ipx *sipx;
	int size;
{
	struct sockaddr_ipx dst;

	dst = *sipx;
	sipx = &dst;
	if (sipx->sipx_addr.x_port == 0)
		sipx->sipx_addr.x_port = htons(IPXPORT_RIP);
#ifdef DEBUG
	if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST)
#endif	
	/*
	 * Kludge to allow us to get routes out to machines that
	 * don't know their addresses yet; send to that address on
	 * ALL connected nets
	 */
	 if (ipx_neteqnn(sipx->sipx_addr.x_net, ipx_zeronet)) {
	 	extern  struct interface *ifnet;
	 	register struct interface *ifp;
		
		for (ifp = ifnet; ifp; ifp = ifp->int_next) {
			sipx->sipx_addr.x_net = 
				satoipx_addr(ifp->int_addr).x_net;
			(void) sendto(s, msg, size, flags,
			    (struct sockaddr *)sipx, sizeof (*sipx));
		}
		return;
	}
	
	(void) sendto(s, msg, size, flags,
	    (struct sockaddr *)sipx, sizeof (*sipx));
}

/*
 * Return 1 if we want this route.
 * We use this to disallow route net G entries for one for multiple
 * point to point links.
 */
int
ipxnet_checkhost(sipx)
	struct sockaddr_ipx *sipx;
{
	register struct interface *ifp = if_ifwithnet((struct sockaddr *)sipx);
	/*
	 * We want this route if there is no more than one 
	 * point to point interface with this network.
	 */
	if (ifp == 0 || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1);
	return (ifp->int_sq.n == ifp->int_sq.p);
}

/*
 * Return 1 if the address is
 * for a host, 0 for a network.
 */
int
ipxnet_ishost(sipx)
struct sockaddr_ipx *sipx;
{
	register u_short *s = sipx->sipx_addr.x_host.s_host;

	if ((s[0]==0x0000) && (s[1]==0x0000) && (s[2]==0x0000))
		return (0);
	if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff))
		return (0);

	return (1);
}

void
ipxnet_canon(sipx)
	struct sockaddr_ipx *sipx;
{

	sipx->sipx_addr.x_port = 0;
}

void
null_hash(addr, hp)
	struct sockaddr *addr;
	struct afhash *hp;
{

	hp->afh_nethash = hp->afh_hosthash = 0;
}

int
null_netmatch(a1, a2)
	struct sockaddr *a1, *a2;
{

	return (0);
}

void
null_output(s, f, a1, n)
	int s;
	int f;
	struct sockaddr *a1;
	int n;
{

	;
}

int
null_portmatch(a1)
	struct sockaddr *a1;
{

	return (0);
}

int
null_portcheck(a1)
	struct sockaddr *a1;
{

	return (0);
}

int
null_ishost(a1)
	struct sockaddr *a1;
{

	return (0);
}

int
null_checkhost(a1)
	struct sockaddr *a1;
{

	return (0);
}

void
null_canon(a1)
	struct sockaddr *a1;
{

	;
}