aboutsummaryrefslogtreecommitdiffstats
path: root/usr.bin/tip/libacu/courier.c
blob: cd642b6df0a740eec22b10eb1a474a63ea9f8b21 (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
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
/*	$OpenBSD: courier.c,v 1.15 2006/03/17 19:17:13 moritz Exp $	*/
/*	$NetBSD: courier.c,v 1.7 1997/02/11 09:24:16 mrg Exp $	*/

/*
 * Copyright (c) 1986, 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. 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.
 */

#ifndef lint
#if 0
static char sccsid[] = "@(#)courier.c	8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] = "$OpenBSD: courier.c,v 1.15 2006/03/17 19:17:13 moritz Exp $";
#endif /* not lint */

/*
 * Routines for calling up on a Courier modem.
 * Derived from Hayes driver.
 */
#include "tip.h"
#include <sys/ioctl.h>
#include <stdio.h>

#define	MAXRETRY	5

static	int dialtimeout = 0;
static	int connected = 0;
static	jmp_buf timeoutbuf;

static void	sigALRM(int);
static int	cour_swallow(char *);
static int	cour_connect(void);
static int	coursync(void);
static void	cour_write(int, char *, int);
static void	cour_nap(void);
#ifdef DEBUG
static void	cour_verbose_read(void);
#endif

int
cour_dialer(char *num, char *acu)
{
	char *cp;
#ifdef ACULOG
	char line[80];
#endif
	struct termios cntrl;

	if (boolean(value(VERBOSE)))
		printf("Using \"%s\"\n", acu);

	tcgetattr(FD, &cntrl);
	cntrl.c_cflag |= HUPCL;
	tcsetattr(FD, TCSAFLUSH, &cntrl);
	/*
	 * Get in synch.
	 */
	if (!coursync()) {
badsynch:
		printf("can't synchronize with courier\n");
#ifdef ACULOG
		logent(value(HOST), num, "courier", "can't synch up");
#endif
		return (0);
	}
	cour_write(FD, "AT E0\r", 6);	/* turn off echoing */
	sleep(1);
#ifdef DEBUG
	if (boolean(value(VERBOSE)))
		cour_verbose_read();
#endif
	tcflush(FD, TCIOFLUSH);
	cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
	if (!cour_swallow("\r\nOK\r\n"))
		goto badsynch;
	fflush(stdout);
	cour_write(FD, "AT D", 4);
	for (cp = num; *cp; cp++)
		if (*cp == '=')
			*cp = ',';
	cour_write(FD, num, strlen(num));
	cour_write(FD, "\r", 1);
	connected = cour_connect();
#ifdef ACULOG
	if (dialtimeout) {
		(void)snprintf(line, sizeof line, "%ld second dial timeout",
			number(value(DIALTIMEOUT)));
		logent(value(HOST), num, "cour", line);
	}
#endif
	if (dialtimeout)
		cour_disconnect();
	return (connected);
}

void
cour_disconnect(void)
{
	 /* first hang up the modem*/
	ioctl(FD, TIOCCDTR, 0);
	sleep(1);
	ioctl(FD, TIOCSDTR, 0);
	coursync();				/* reset */
	close(FD);
}

void
cour_abort(void)
{
	cour_write(FD, "\r", 1);	/* send anything to abort the call */
	cour_disconnect();
}

/*ARGSUSED*/
static void
sigALRM(int signo)
{
	printf("\07timeout waiting for reply\n");
	dialtimeout = 1;
	longjmp(timeoutbuf, 1);
}

static int
cour_swallow(char *match)
{
	sig_t f;
	char c;

	f = signal(SIGALRM, sigALRM);
	dialtimeout = 0;
	do {
		if (*match =='\0') {
			signal(SIGALRM, f);
			return (1);
		}
		if (setjmp(timeoutbuf)) {
			signal(SIGALRM, f);
			return (0);
		}
		alarm(number(value(DIALTIMEOUT)));
		read(FD, &c, 1);
		alarm(0);
		c &= 0177;
#ifdef DEBUG
		if (boolean(value(VERBOSE)))
			putchar(c);
#endif
	} while (c == *match++);
#ifdef DEBUG
	if (boolean(value(VERBOSE)))
		fflush(stdout);
#endif
	signal(SIGALRM, SIG_DFL);
	return (0);
}

struct baud_msg {
	char *msg;
	int baud;
} baud_msg[] = {
	{ "",		B300 },
	{ " 1200",	B1200 },
	{ " 2400",	B2400 },
	{ " 9600",	B9600 },
	{ " 9600/ARQ",	B9600 },
	{ 0,		0 },
};

static int
cour_connect(void)
{
	char c;
	int nc, nl, n;
	char dialer_buf[64];
	struct baud_msg *bm;
	sig_t f;

	if (cour_swallow("\r\n") == 0)
		return (0);
	f = signal(SIGALRM, sigALRM);
again:
	nc = 0; nl = sizeof(dialer_buf)-1;
	bzero(dialer_buf, sizeof(dialer_buf));
	dialtimeout = 0;
	for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
		if (setjmp(timeoutbuf))
			break;
		alarm(number(value(DIALTIMEOUT)));
		n = read(FD, &c, 1);
		alarm(0);
		if (n <= 0)
			break;
		c &= 0x7f;
		if (c == '\r') {
			if (cour_swallow("\n") == 0)
				break;
			if (!dialer_buf[0])
				goto again;
			if (strcmp(dialer_buf, "RINGING") == 0 &&
			    boolean(value(VERBOSE))) {
#ifdef DEBUG
				printf("%s\r\n", dialer_buf);
#endif
				goto again;
			}
			if (strncmp(dialer_buf, "CONNECT",
				    sizeof("CONNECT")-1) != 0)
				break;
			for (bm = baud_msg ; bm->msg ; bm++)
				if (strcmp(bm->msg,
				    dialer_buf+sizeof("CONNECT")-1) == 0) {
					struct termios	cntrl;

					tcgetattr(FD, &cntrl);
					cfsetospeed(&cntrl, bm->baud);
					cfsetispeed(&cntrl, bm->baud);
					tcsetattr(FD, TCSAFLUSH, &cntrl);
					signal(SIGALRM, f);
#ifdef DEBUG
					if (boolean(value(VERBOSE)))
						printf("%s\r\n", dialer_buf);
#endif
					return (1);
				}
			break;
		}
		dialer_buf[nc] = c;
#ifdef notdef
		if (boolean(value(VERBOSE)))
			putchar(c);
#endif
	}
	printf("%s\r\n", dialer_buf);
	signal(SIGALRM, f);
	return (0);
}

/*
 * This convoluted piece of code attempts to get
 * the courier in sync.
 */
static int
coursync(void)
{
	int already = 0;
	int len;
	char buf[40];

	while (already++ < MAXRETRY) {
		tcflush(FD, TCIOFLUSH);
		cour_write(FD, "\rAT Z\r", 6);	/* reset modem */
		bzero(buf, sizeof(buf));
		sleep(1);
		ioctl(FD, FIONREAD, &len);
		if (len) {
			len = read(FD, buf, sizeof(buf));
#ifdef DEBUG
			buf[len] = '\0';
			printf("coursync: (\"%s\")\n\r", buf);
#endif
			if (strchr(buf, '0') || 
		   	   (strchr(buf, 'O') && strchr(buf, 'K')))
				return(1);
		}
		/*
		 * If not strapped for DTR control,
		 * try to get command mode.
		 */
		sleep(1);
		cour_write(FD, "+++", 3);
		sleep(1);
		/*
		 * Toggle DTR to force anyone off that might have left
		 * the modem connected.
		 */
		ioctl(FD, TIOCCDTR, 0);
		sleep(1);
		ioctl(FD, TIOCSDTR, 0);
	}
	cour_write(FD, "\rAT Z\r", 6);
	return (0);
}

static void
cour_write(int fd, char *cp, int n)
{
#ifdef notdef
	if (boolean(value(VERBOSE)))
		write(1, cp, n);
#endif
	tcdrain(fd);
	cour_nap();
	for ( ; n-- ; cp++) {
		write(fd, cp, 1);
		tcdrain(fd);
		cour_nap();
	}
}

#ifdef DEBUG
static void
cour_verbose_read(void)
{
	int n = 0;
	char buf[BUFSIZ];

	if (ioctl(FD, FIONREAD, &n) < 0)
		return;
	if (n <= 0)
		return;
	if (read(FD, buf, n) != n)
		return;
	write(1, buf, n);
}
#endif

/* Give the courier 50 milliseconds between characters */
static void
cour_nap(void)
{
	struct timespec ts;

	ts.tv_sec = 0;
	ts.tv_nsec = 50 * 1000000;

	nanosleep(&ts, NULL);
}