summaryrefslogtreecommitdiffstats
path: root/sys/netncp/ncp_sock.c
blob: d0fc02cb9dde79daebb74764a44218a5e0ee42e6 (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
/*
 * Copyright (c) 1999, 2001 Boris Popov
 * 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 Boris Popov.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD$
 *
 * Low level socket routines
 */

#include <sys/param.h>
#include <sys/errno.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/kernel.h>
#include <sys/uio.h>
#include <sys/syslog.h>
#include <sys/mbuf.h>
#include <sys/condvar.h>
#include <net/route.h>

#include <netipx/ipx.h>
#include <netipx/ipx_pcb.h>

#include <netncp/ncp.h>
#include <netncp/ncp_conn.h>
#include <netncp/ncp_sock.h>
#include <netncp/ncp_subr.h>
#include <netncp/ncp_rq.h>

#define ipx_setnullnet(x) ((x).x_net.s_net[0]=0); ((x).x_net.s_net[1]=0);
#define ipx_setnullhost(x) ((x).x_host.s_host[0] = 0); \
	((x).x_host.s_host[1] = 0); ((x).x_host.s_host[2] = 0);

/*int ncp_poll(struct socket *so, int events);*/
/*static int ncp_getsockname(struct socket *so, caddr_t asa, int *alen);*/
static int ncp_soconnect(struct socket *so, struct sockaddr *target,
			 struct thread *td);


/* This will need only if native IP used, or (unlikely) NCP will be
 * implemented on the socket level
 */
static int
ncp_soconnect(struct socket *so, struct sockaddr *target, struct thread *td)
{
	int error, s;

	error = soconnect(so, (struct sockaddr*)target, td);
	if (error)
		return error;
	/*
	 * Wait for the connection to complete. Cribbed from the
	 * connect system call but with the wait timing out so
	 * that interruptible mounts don't hang here for a long time.
	 */
	error = EIO;
	s = splnet();
	while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
		(void) tsleep((caddr_t)&so->so_timeo, PSOCK, "ncpcon", 2 * hz);
		if ((so->so_state & SS_ISCONNECTING) &&
		    so->so_error == 0 /*&& rep &&*/) {
			so->so_state &= ~SS_ISCONNECTING;
			splx(s);
			goto bad;
		}
	}
	if (so->so_error) {
		error = so->so_error;
		so->so_error = 0;
		splx(s);
		goto bad;
	}
		splx(s);
	error=0;
bad:
	return error;
}
#ifdef notyet
static int
ncp_getsockname(struct socket *so, caddr_t asa, int *alen) {
	struct sockaddr *sa;
	int len=0, error;

	sa = 0;
	error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa);
	if (error==0) {
		if (sa) {
			len = min(len, sa->sa_len);
			bcopy(sa, (caddr_t)asa, (u_int)len);
		}
		*alen=len;
	}
	if (sa)
		FREE(sa, M_SONAME);
	return (error);
}
#endif
int ncp_sock_recv(struct socket *so, struct mbuf **mp, int *rlen)
{
	struct uio auio;
	struct thread *td = curthread; /* XXX */
	int error,flags,len;

	auio.uio_resid = len = 1000000;
	auio.uio_td = td;
	flags = MSG_DONTWAIT;

/*	error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, &auio,
	    (struct mbuf **)0, (struct mbuf **)0, &flags);*/
	error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, &auio,
	    mp, (struct mbuf **)0, &flags);
	*rlen = len - auio.uio_resid;
/*	if (!error) {
	    *rlen=iov.iov_len;
	} else
	    *rlen=0;*/
#ifdef NCP_SOCKET_DEBUG
	if (error)
		printf("ncp_recv: err=%d\n", error);
#endif
	return (error);
}

int
ncp_sock_send(struct socket *so, struct mbuf *top, struct ncp_rq *rqp)
{
	struct thread *td = curthread; /* XXX */
	struct sockaddr *to = 0;
	struct ncp_conn *conn = rqp->nr_conn;
	struct mbuf *m;
	int error, flags=0;
	int sendwait;

	for (;;) {
		m = m_copym(top, 0, M_COPYALL, M_TRYWAIT);
/*		NCPDDEBUG(m);*/
		error = so->so_proto->pr_usrreqs->pru_sosend(so, to, 0, m, 0, flags, td);
		if (error == 0 || error == EINTR || error == ENETDOWN)
			break;
		if (rqp->rexmit == 0) break;
		rqp->rexmit--;
		tsleep(&sendwait, PWAIT, "ncprsn", conn->li.timeout * hz);
		error = ncp_chkintr(conn, td);
		if (error == EINTR) break;
	}
	if (error) {
		log(LOG_INFO, "ncp_send: error %d for server %s", error, conn->li.server);
	}
	return error;
}

int
ncp_poll(struct socket *so, int events)
{
    struct thread *td = curthread;
    struct ucred *cred = NULL;

    return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, td);
}

int
ncp_sock_rselect(struct socket *so, struct thread *td, struct timeval *tv,
		 int events)
{
	struct timeval atv, rtv, ttv;
	int ncoll, timo, error = 0;

	if (tv) {
		atv = *tv;
		if (itimerfix(&atv)) {
			error = EINVAL;
			goto done_noproclock;
		}
		getmicrouptime(&rtv);
		timevaladd(&atv, &rtv);
	}
	timo = 0;
	mtx_lock(&sellock);

retry:
	ncoll = nselcoll;
	mtx_lock_spin(&sched_lock);
	td->td_flags |= TDF_SELECT;
	mtx_unlock_spin(&sched_lock);
	mtx_unlock(&sellock);

	TAILQ_INIT(&td->td_selq);
	error = ncp_poll(so, events);
	mtx_lock(&sellock);
	if (error) {
		error = 0;
		goto done;
	}
	if (tv) {
		getmicrouptime(&rtv);
		if (timevalcmp(&rtv, &atv, >=))
			goto done;
		ttv = atv;
		timevalsub(&ttv, &rtv);
		timo = tvtohz(&ttv);
	}
	/*
	 * An event of our interest may occur during locking a thread.
	 * In order to avoid missing the event that occurred during locking
	 * the process, test TDF_SELECT and rescan file descriptors if
	 * necessary.
	 */
	mtx_lock_spin(&sched_lock);
	if ((td->td_flags & TDF_SELECT) == 0 || nselcoll != ncoll) {
		mtx_unlock_spin(&sched_lock);
		goto retry;
	}
	mtx_unlock_spin(&sched_lock);

	if (timo > 0)
		error = cv_timedwait(&selwait, &sellock, timo);
	else {
		cv_wait(&selwait, &sellock);
		error = 0;
	}

done:
	clear_selinfo_list(td);

	mtx_lock_spin(&sched_lock);
	td->td_flags &= ~TDF_SELECT;
	mtx_unlock_spin(&sched_lock);
	mtx_unlock(&sellock);

done_noproclock:
	if (error == ERESTART)
		error = 0;
	return (error);
}

/*
 * Connect to specified server via IPX
 */
static int
ncp_sock_connect_ipx(struct ncp_conn *conn)
{
	struct sockaddr_ipx sipx;
	struct ipxpcb *npcb;
	struct thread *td = conn->td;
	int addrlen, error, count;

	sipx.sipx_port = htons(0);

	for (count = 0;;count++) {
		if (count > (IPXPORT_WELLKNOWN-IPXPORT_RESERVED)*2) {
			error = EADDRINUSE;
			goto bad;
		}
		conn->ncp_so = conn->wdg_so = NULL;
		checkbad(socreate(AF_IPX, &conn->ncp_so, SOCK_DGRAM, 0, td->td_ucred, td));
		if (conn->li.opt & NCP_OPT_WDOG)
			checkbad(socreate(AF_IPX, &conn->wdg_so, SOCK_DGRAM, 0, td->td_ucred, td));
		addrlen = sizeof(sipx);
		sipx.sipx_family = AF_IPX;
		ipx_setnullnet(sipx.sipx_addr);
		ipx_setnullhost(sipx.sipx_addr);
		sipx.sipx_len = addrlen;
		error = sobind(conn->ncp_so, (struct sockaddr *)&sipx, td);
		if (error == 0) {
			if ((conn->li.opt & NCP_OPT_WDOG) == 0)
				break;
			sipx.sipx_addr = sotoipxpcb(conn->ncp_so)->ipxp_laddr;
			sipx.sipx_port = htons(ntohs(sipx.sipx_port) + 1);
			ipx_setnullnet(sipx.sipx_addr);
			ipx_setnullhost(sipx.sipx_addr);
			error = sobind(conn->wdg_so, (struct sockaddr *)&sipx, td);
		}
		if (!error) break;
		if (error != EADDRINUSE) goto bad;
		sipx.sipx_port = htons((ntohs(sipx.sipx_port)+4) & 0xfff8);
		soclose(conn->ncp_so);
		if (conn->wdg_so)
			soclose(conn->wdg_so);
	}
	npcb = sotoipxpcb(conn->ncp_so);
	npcb->ipxp_dpt = IPXPROTO_NCP;
	/* IPXrouted must be running, i.e. route must be presented */
	conn->li.ipxaddr.sipx_len = sizeof(struct sockaddr_ipx);
	checkbad(ncp_soconnect(conn->ncp_so, &conn->li.saddr, td));
	if (conn->wdg_so) {
		sotoipxpcb(conn->wdg_so)->ipxp_laddr.x_net = npcb->ipxp_laddr.x_net;
		sotoipxpcb(conn->wdg_so)->ipxp_laddr.x_host= npcb->ipxp_laddr.x_host;
	}
	if (!error) {
		conn->flags |= NCPFL_SOCONN;
	}
#ifdef NCPBURST
	if (ncp_burst_enabled) {
		checkbad(socreate(AF_IPX, &conn->bc_so, SOCK_DGRAM, 0, td));
		bzero(&sipx, sizeof(sipx));
		sipx.sipx_len = sizeof(sipx);
		checkbad(sobind(conn->bc_so, (struct sockaddr *)&sipx, td));
		checkbad(ncp_soconnect(conn->bc_so, &conn->li.saddr, td));
	}
#endif
	if (!error) {
		conn->flags |= NCPFL_SOCONN;
		ncp_sock_checksum(conn, 0);
	}
	return error;
bad:
	ncp_sock_disconnect(conn);
	return (error);
}

int
ncp_sock_checksum(struct ncp_conn *conn, int enable)
{

	if (enable) {
		sotoipxpcb(conn->ncp_so)->ipxp_flags |= IPXP_CHECKSUM;
	} else {
		sotoipxpcb(conn->ncp_so)->ipxp_flags &= ~IPXP_CHECKSUM;
	}
	return 0;
}

/*
 * Connect to specified server via IP
 */
static int
ncp_sock_connect_in(struct ncp_conn *conn)
{
	struct sockaddr_in sin;
	struct thread *td = conn->td;
	int addrlen = sizeof(sin), error;

	conn->flags = 0;
	bzero(&sin,addrlen);
	conn->ncp_so = conn->wdg_so = NULL;
	checkbad(socreate(AF_INET, &conn->ncp_so, SOCK_DGRAM, IPPROTO_UDP, td->td_ucred, td));
	sin.sin_family = AF_INET;
	sin.sin_len = addrlen;
	checkbad(sobind(conn->ncp_so, (struct sockaddr *)&sin, td));
	checkbad(ncp_soconnect(conn->ncp_so,(struct sockaddr*)&conn->li.addr, td));
	if  (!error)
		conn->flags |= NCPFL_SOCONN;
	return error;
bad:
	ncp_sock_disconnect(conn);
	return (error);
}

int
ncp_sock_connect(struct ncp_conn *ncp)
{
	int error;

	switch (ncp->li.saddr.sa_family) {
	    case AF_IPX:
		error = ncp_sock_connect_ipx(ncp);
		break;
	    case AF_INET:
		error = ncp_sock_connect_in(ncp);
		break;
	    default:
		return EPROTONOSUPPORT;
	}
	return error;
}

/*
 * Connection expected to be locked
 */
int
ncp_sock_disconnect(struct ncp_conn *conn) {
	register struct socket *so;
	conn->flags &= ~(NCPFL_SOCONN | NCPFL_ATTACHED | NCPFL_LOGGED);
	if (conn->ncp_so) {
		so = conn->ncp_so;
		conn->ncp_so = (struct socket *)0;
		soshutdown(so, 2);
		soclose(so);
	}
	if (conn->wdg_so) {
		so = conn->wdg_so;
		conn->wdg_so = (struct socket *)0;
		soshutdown(so, 2);
		soclose(so);
	}
#ifdef NCPBURST
	if (conn->bc_so) {
		so = conn->bc_so;
		conn->bc_so = (struct socket *)NULL;
		soshutdown(so, 2);
		soclose(so);
	}
#endif
	return 0;
}

static void
ncp_watchdog(struct ncp_conn *conn) {
	char *buf;
	struct mbuf *m;
	int error, len, flags;
	struct socket *so;
	struct sockaddr *sa;
	struct uio auio;

	sa = NULL;
	while (conn->wdg_so) { /* not a loop */
		so = conn->wdg_so;
		auio.uio_resid = len = 1000000;
		auio.uio_td = curthread;
		flags = MSG_DONTWAIT;
		error = so->so_proto->pr_usrreqs->pru_soreceive(so,
		    (struct sockaddr**)&sa, &auio, &m, (struct mbuf**)0, &flags);
		if (error) break;
		len -= auio.uio_resid;
		NCPSDEBUG("got watch dog %d\n",len);
		if (len != 2) break;
		buf = mtod(m, char*);
		if (buf[1] != '?') break;
		buf[1] = 'Y';
		error = so->so_proto->pr_usrreqs->pru_sosend(so, (struct sockaddr*)sa, 0, m, 0, 0, curthread);
		NCPSDEBUG("send watch dog %d\n",error);
		break;
	}
	if (sa) FREE(sa, M_SONAME);
	return;
}

void
ncp_check_conn(struct ncp_conn *conn) {
	int s;

	if (conn == NULL || !(conn->flags & NCPFL_ATTACHED))
	        return;
	s = splnet();
	ncp_check_rq(conn);
	splx(s);
	if (conn->li.saddr.sa_family == AF_IPX)
		ncp_watchdog(conn);
}
OpenPOWER on IntegriCloud