summaryrefslogtreecommitdiffstats
path: root/sys/netns/idp_usrreq.c
blob: 6ff4b4f62cf153ff9e0ef231e33b1769cd61be33 (plain)
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
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
/*
 * Copyright (c) 1984, 1985, 1986, 1987, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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.
 *
 *	@(#)idp_usrreq.c	8.1 (Berkeley) 6/10/93
 * $Id$
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/stat.h>

#include <net/if.h>
#include <net/route.h>

#include <netns/ns.h>
#include <netns/ns_pcb.h>
#include <netns/ns_if.h>
#include <netns/idp.h>
#include <netns/idp_var.h>
#include <netns/ns_error.h>

/*
 * IDP protocol implementation.
 */

struct	sockaddr_ns idp_ns = { sizeof(idp_ns), AF_NS };

/*
 *  This may also be called for raw listeners.
 */
idp_input(m, nsp)
	struct mbuf *m;
	register struct nspcb *nsp;
{
	register struct idp *idp = mtod(m, struct idp *);
	struct ifnet *ifp = m->m_pkthdr.rcvif;

	if (nsp==0)
		panic("No nspcb");
	/*
	 * Construct sockaddr format source address.
	 * Stuff source address and datagram in user buffer.
	 */
	idp_ns.sns_addr = idp->idp_sna;
	if (ns_neteqnn(idp->idp_sna.x_net, ns_zeronet) && ifp) {
		register struct ifaddr *ifa;

		for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) {
			if (ifa->ifa_addr->sa_family == AF_NS) {
				idp_ns.sns_addr.x_net =
					IA_SNS(ifa)->sns_addr.x_net;
				break;
			}
		}
	}
	nsp->nsp_rpt = idp->idp_pt;
	if ( ! (nsp->nsp_flags & NSP_RAWIN) ) {
		m->m_len -= sizeof (struct idp);
		m->m_pkthdr.len -= sizeof (struct idp);
		m->m_data += sizeof (struct idp);
	}
	if (sbappendaddr(&nsp->nsp_socket->so_rcv, (struct sockaddr *)&idp_ns,
	    m, (struct mbuf *)0) == 0)
		goto bad;
	sorwakeup(nsp->nsp_socket);
	return;
bad:
	m_freem(m);
}

idp_abort(nsp)
	struct nspcb *nsp;
{
	struct socket *so = nsp->nsp_socket;

	ns_pcbdisconnect(nsp);
	soisdisconnected(so);
}
/*
 * Drop connection, reporting
 * the specified error.
 */
struct nspcb *
idp_drop(nsp, errno)
	register struct nspcb *nsp;
	int errno;
{
	struct socket *so = nsp->nsp_socket;

	/*
	 * someday, in the xerox world
	 * we will generate error protocol packets
	 * announcing that the socket has gone away.
	 */
	/*if (TCPS_HAVERCVDSYN(tp->t_state)) {
		tp->t_state = TCPS_CLOSED;
		(void) tcp_output(tp);
	}*/
	so->so_error = errno;
	ns_pcbdisconnect(nsp);
	soisdisconnected(so);
}

int noIdpRoute;
idp_output(nsp, m0)
	struct nspcb *nsp;
	struct mbuf *m0;
{
	register struct mbuf *m;
	register struct idp *idp;
	register struct socket *so;
	register int len = 0;
	register struct route *ro;
	struct mbuf *mprev;
	extern int idpcksum;

	/*
	 * Calculate data length.
	 */
	for (m = m0; m; m = m->m_next) {
		mprev = m;
		len += m->m_len;
	}
	/*
	 * Make sure packet is actually of even length.
	 */

	if (len & 1) {
		m = mprev;
		if ((m->m_flags & M_EXT) == 0 &&
			(m->m_len + m->m_data < &m->m_dat[MLEN])) {
			m->m_len++;
		} else {
			struct mbuf *m1 = m_get(M_DONTWAIT, MT_DATA);

			if (m1 == 0) {
				m_freem(m0);
				return (ENOBUFS);
			}
			m1->m_len = 1;
			* mtod(m1, char *) = 0;
			m->m_next = m1;
		}
		m0->m_pkthdr.len++;
	}

	/*
	 * Fill in mbuf with extended IDP header
	 * and addresses and length put into network format.
	 */
	m = m0;
	if (nsp->nsp_flags & NSP_RAWOUT) {
		idp = mtod(m, struct idp *);
	} else {
		M_PREPEND(m, sizeof (struct idp), M_DONTWAIT);
		if (m == 0)
			return (ENOBUFS);
		idp = mtod(m, struct idp *);
		idp->idp_tc = 0;
		idp->idp_pt = nsp->nsp_dpt;
		idp->idp_sna = nsp->nsp_laddr;
		idp->idp_dna = nsp->nsp_faddr;
		len += sizeof (struct idp);
	}

	idp->idp_len = htons((u_short)len);

	if (idpcksum) {
		idp->idp_sum = 0;
		len = ((len - 1) | 1) + 1;
		idp->idp_sum = ns_cksum(m, len);
	} else
		idp->idp_sum = 0xffff;

	/*
	 * Output datagram.
	 */
	so = nsp->nsp_socket;
	if (so->so_options & SO_DONTROUTE)
		return (ns_output(m, (struct route *)0,
		    (so->so_options & SO_BROADCAST) | NS_ROUTETOIF));
	/*
	 * Use cached route for previous datagram if
	 * possible.  If the previous net was the same
	 * and the interface was a broadcast medium, or
	 * if the previous destination was identical,
	 * then we are ok.
	 *
	 * NB: We don't handle broadcasts because that
	 *     would require 3 subroutine calls.
	 */
	ro = &nsp->nsp_route;
#ifdef ancient_history
	/*
	 * I think that this will all be handled in ns_pcbconnect!
	 */
	if (ro->ro_rt) {
		if(ns_neteq(nsp->nsp_lastdst, idp->idp_dna)) {
			/*
			 * This assumes we have no GH type routes
			 */
			if (ro->ro_rt->rt_flags & RTF_HOST) {
				if (!ns_hosteq(nsp->nsp_lastdst, idp->idp_dna))
					goto re_route;

			}
			if ((ro->ro_rt->rt_flags & RTF_GATEWAY) == 0) {
				register struct ns_addr *dst =
						&satons_addr(ro->ro_dst);
				dst->x_host = idp->idp_dna.x_host;
			}
			/*
			 * Otherwise, we go through the same gateway
			 * and dst is already set up.
			 */
		} else {
		re_route:
			RTFREE(ro->ro_rt);
			ro->ro_rt = (struct rtentry *)0;
		}
	}
	nsp->nsp_lastdst = idp->idp_dna;
#endif /* ancient_history */
	if (noIdpRoute) ro = 0;
	return (ns_output(m, ro, so->so_options & SO_BROADCAST));
}
/* ARGSUSED */
idp_ctloutput(req, so, level, name, value)
	int req, level;
	struct socket *so;
	int name;
	struct mbuf **value;
{
	register struct mbuf *m;
	struct nspcb *nsp = sotonspcb(so);
	int mask, error = 0;
	extern long ns_pexseq;

	if (nsp == NULL)
		return (EINVAL);

	switch (req) {

	case PRCO_GETOPT:
		if (value==NULL)
			return (EINVAL);
		m = m_get(M_DONTWAIT, MT_DATA);
		if (m==NULL)
			return (ENOBUFS);
		switch (name) {

		case SO_ALL_PACKETS:
			mask = NSP_ALL_PACKETS;
			goto get_flags;

		case SO_HEADERS_ON_INPUT:
			mask = NSP_RAWIN;
			goto get_flags;

		case SO_HEADERS_ON_OUTPUT:
			mask = NSP_RAWOUT;
		get_flags:
			m->m_len = sizeof(short);
			*mtod(m, short *) = nsp->nsp_flags & mask;
			break;

		case SO_DEFAULT_HEADERS:
			m->m_len = sizeof(struct idp);
			{
				register struct idp *idp = mtod(m, struct idp *);
				idp->idp_len = 0;
				idp->idp_sum = 0;
				idp->idp_tc = 0;
				idp->idp_pt = nsp->nsp_dpt;
				idp->idp_dna = nsp->nsp_faddr;
				idp->idp_sna = nsp->nsp_laddr;
			}
			break;

		case SO_SEQNO:
			m->m_len = sizeof(long);
			*mtod(m, long *) = ns_pexseq++;
			break;

		default:
			error = EINVAL;
		}
		*value = m;
		break;

	case PRCO_SETOPT:
		switch (name) {
			int *ok;

		case SO_ALL_PACKETS:
			mask = NSP_ALL_PACKETS;
			goto set_head;

		case SO_HEADERS_ON_INPUT:
			mask = NSP_RAWIN;
			goto set_head;

		case SO_HEADERS_ON_OUTPUT:
			mask = NSP_RAWOUT;
		set_head:
			if (value && *value) {
				ok = mtod(*value, int *);
				if (*ok)
					nsp->nsp_flags |= mask;
				else
					nsp->nsp_flags &= ~mask;
			} else error = EINVAL;
			break;

		case SO_DEFAULT_HEADERS:
			{
				register struct idp *idp
				    = mtod(*value, struct idp *);
				nsp->nsp_dpt = idp->idp_pt;
			}
			break;
#ifdef NSIP

		case SO_NSIP_ROUTE:
			error = nsip_route(*value);
			break;
#endif /* NSIP */
		default:
			error = EINVAL;
		}
		if (value && *value)
			m_freem(*value);
		break;
	}
	return (error);
}

/*ARGSUSED*/
idp_usrreq(so, req, m, nam, control)
	struct socket *so;
	int req;
	struct mbuf *m, *nam, *control;
{
	struct nspcb *nsp = sotonspcb(so);
	int error = 0;

	if (req == PRU_CONTROL)
                return (ns_control(so, (int)m, (caddr_t)nam,
			(struct ifnet *)control));
	if (control && control->m_len) {
		error = EINVAL;
		goto release;
	}
	if (nsp == NULL && req != PRU_ATTACH) {
		error = EINVAL;
		goto release;
	}
	switch (req) {

	case PRU_ATTACH:
		if (nsp != NULL) {
			error = EINVAL;
			break;
		}
		error = ns_pcballoc(so, &nspcb);
		if (error)
			break;
		error = soreserve(so, (u_long) 2048, (u_long) 2048);
		if (error)
			break;
		break;

	case PRU_DETACH:
		if (nsp == NULL) {
			error = ENOTCONN;
			break;
		}
		ns_pcbdetach(nsp);
		break;

	case PRU_BIND:
		error = ns_pcbbind(nsp, nam);
		break;

	case PRU_LISTEN:
		error = EOPNOTSUPP;
		break;

	case PRU_CONNECT:
		if (!ns_nullhost(nsp->nsp_faddr)) {
			error = EISCONN;
			break;
		}
		error = ns_pcbconnect(nsp, nam);
		if (error == 0)
			soisconnected(so);
		break;

	case PRU_CONNECT2:
		error = EOPNOTSUPP;
		break;

	case PRU_ACCEPT:
		error = EOPNOTSUPP;
		break;

	case PRU_DISCONNECT:
		if (ns_nullhost(nsp->nsp_faddr)) {
			error = ENOTCONN;
			break;
		}
		ns_pcbdisconnect(nsp);
		soisdisconnected(so);
		break;

	case PRU_SHUTDOWN:
		socantsendmore(so);
		break;

	case PRU_SEND:
	{
		struct ns_addr laddr;
		int s;

		if (nam) {
			laddr = nsp->nsp_laddr;
			if (!ns_nullhost(nsp->nsp_faddr)) {
				error = EISCONN;
				break;
			}
			/*
			 * Must block input while temporarily connected.
			 */
			s = splnet();
			error = ns_pcbconnect(nsp, nam);
			if (error) {
				splx(s);
				break;
			}
		} else {
			if (ns_nullhost(nsp->nsp_faddr)) {
				error = ENOTCONN;
				break;
			}
		}
		error = idp_output(nsp, m);
		m = NULL;
		if (nam) {
			ns_pcbdisconnect(nsp);
			splx(s);
			nsp->nsp_laddr.x_host = laddr.x_host;
			nsp->nsp_laddr.x_port = laddr.x_port;
		}
	}
		break;

	case PRU_ABORT:
		ns_pcbdetach(nsp);
		sofree(so);
		soisdisconnected(so);
		break;

	case PRU_SOCKADDR:
		ns_setsockaddr(nsp, nam);
		break;

	case PRU_PEERADDR:
		ns_setpeeraddr(nsp, nam);
		break;

	case PRU_SENSE:
		/*
		 * stat: don't bother with a blocksize.
		 */
		return (0);

	case PRU_SENDOOB:
	case PRU_FASTTIMO:
	case PRU_SLOWTIMO:
	case PRU_PROTORCV:
	case PRU_PROTOSEND:
		error =  EOPNOTSUPP;
		break;

	case PRU_CONTROL:
	case PRU_RCVD:
	case PRU_RCVOOB:
		return (EOPNOTSUPP);	/* do not free mbuf's */

	default:
		panic("idp_usrreq");
	}
release:
	if (control != NULL)
		m_freem(control);
	if (m != NULL)
		m_freem(m);
	return (error);
}
/*ARGSUSED*/
idp_raw_usrreq(so, req, m, nam, control)
	struct socket *so;
	int req;
	struct mbuf *m, *nam, *control;
{
	int error = 0;
	struct nspcb *nsp = sotonspcb(so);
	extern struct nspcb nsrawpcb;

	switch (req) {

	case PRU_ATTACH:

		if (!(so->so_state & SS_PRIV) || (nsp != NULL)) {
			error = EINVAL;
			break;
		}
		error = ns_pcballoc(so, &nsrawpcb);
		if (error)
			break;
		error = soreserve(so, (u_long) 2048, (u_long) 2048);
		if (error)
			break;
		nsp = sotonspcb(so);
		nsp->nsp_faddr.x_host = ns_broadhost;
		nsp->nsp_flags = NSP_RAWIN | NSP_RAWOUT;
		break;
	default:
		error = idp_usrreq(so, req, m, nam, control);
	}
	return (error);
}

OpenPOWER on IntegriCloud