1/*	$OpenBSD: biz31.c,v 1.10 2006/03/17 19:17:13 moritz Exp $	*/
2/*	$NetBSD: biz31.c,v 1.5 1997/02/11 09:24:14 mrg Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (c) 1983, 1993
8 *	The Regents of the University of California.  All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)biz31.c	8.1 (Berkeley) 6/6/93";
41static char rcsid[] = "$OpenBSD: biz31.c,v 1.10 2006/03/17 19:17:13 moritz Exp $";
42#endif
43#endif /* not lint */
44
45#include "tip.h"
46
47#define MAXRETRY	3		/* sync up retry count */
48#define DISCONNECT_CMD	"\21\25\11\24"	/* disconnection string */
49
50static int	biz_dialer(char *, char *);
51static int	bizsync(int);
52static int	echo(char *);
53static void	sigALRM(int);
54static int	detect(char *);
55static int	flush(char *);
56static int	bizsync(int);
57
58static	int timeout = 0;
59static	jmp_buf timeoutbuf;
60
61/*
62 * Dial up on a BIZCOMP Model 1031 with either
63 * 	tone dialing (mod = "f")
64 *	pulse dialing (mod = "w")
65 */
66static int
67biz_dialer(char *num, char *mod)
68{
69	int connected = 0;
70
71	if (!bizsync(FD)) {
72		logent(value(HOST), "", "biz", "out of sync");
73		printf("bizcomp out of sync\n");
74		delock(uucplock);
75		exit(0);
76	}
77	if (boolean(value(VERBOSE)))
78		printf("\nstarting call...");
79	echo("#\rk$\r$\n");			/* disable auto-answer */
80	echo("$>$.$ #\r");			/* tone/pulse dialing */
81	echo(mod);
82	echo("$\r$\n");
83	echo("$>$.$ #\re$ ");			/* disconnection sequence */
84	echo(DISCONNECT_CMD);
85	echo("\r$\n$\r$\n");
86	echo("$>$.$ #\rr$ ");			/* repeat dial */
87	echo(num);
88	echo("\r$\n");
89	if (boolean(value(VERBOSE)))
90		printf("ringing...");
91	/*
92	 * The reply from the BIZCOMP should be:
93	 *	`^G NO CONNECTION\r\n^G\r\n'	failure
94	 *	` CONNECTION\r\n^G'		success
95	 */
96	connected = detect(" ");
97#ifdef ACULOG
98	if (timeout) {
99		char line[80];
100
101		(void)snprintf(line, sizeof line, "%ld second dial timeout",
102			number(value(DIALTIMEOUT)));
103		logent(value(HOST), num, "biz", line);
104	}
105#endif
106	if (!connected)
107		flush(" NO CONNECTION\r\n\07\r\n");
108	else
109		flush("CONNECTION\r\n\07");
110	if (timeout)
111		biz31_disconnect();	/* insurance */
112	return (connected);
113}
114
115int
116biz31w_dialer(char *num, char *acu)
117{
118	return (biz_dialer(num, "w"));
119}
120
121int
122biz31f_dialer(char *num, char *acu)
123{
124	return (biz_dialer(num, "f"));
125}
126
127void
128biz31_disconnect(void)
129{
130	write(FD, DISCONNECT_CMD, sizeof(DISCONNECT_CMD)-1);
131	sleep(2);
132	tcflush(FD, TCIOFLUSH);
133}
134
135void
136biz31_abort(void)
137{
138	write(FD, "\33", 1);
139}
140
141static int
142echo(char *s)
143{
144	char c;
145
146	while (c = *s++) switch (c) {
147
148	case '$':
149		read(FD, &c, 1);
150		s++;
151		break;
152
153	case '#':
154		c = *s++;
155		write(FD, &c, 1);
156		break;
157
158	default:
159		write(FD, &c, 1);
160		read(FD, &c, 1);
161	}
162}
163
164/*ARGSUSED*/
165static void
166sigALRM(int signo)
167{
168	timeout = 1;
169	longjmp(timeoutbuf, 1);
170}
171
172static int
173detect(char *s)
174{
175	sig_t f;
176	char c;
177
178	f = signal(SIGALRM, sigALRM);
179	timeout = 0;
180	while (*s) {
181		if (setjmp(timeoutbuf)) {
182			printf("\07timeout waiting for reply\n");
183			biz31_abort();
184			break;
185		}
186		alarm(number(value(DIALTIMEOUT)));
187		read(FD, &c, 1);
188		alarm(0);
189		if (c != *s++)
190			break;
191	}
192	signal(SIGALRM, f);
193	return (timeout == 0);
194}
195
196static int
197flush(char *s)
198{
199	sig_t f;
200	char c;
201
202	f = signal(SIGALRM, sigALRM);
203	while (*s++) {
204		if (setjmp(timeoutbuf))
205			break;
206		alarm(10);
207		read(FD, &c, 1);
208		alarm(0);
209	}
210	signal(SIGALRM, f);
211	timeout = 0;			/* guard against disconnection */
212}
213
214/*
215 * This convoluted piece of code attempts to get
216 *  the bizcomp in sync.  If you don't have the capacity or nread
217 *  call there are gory ways to simulate this.
218 */
219static int
220bizsync(int fd)
221{
222#ifdef FIOCAPACITY
223	struct capacity b;
224#	define chars(b)	((b).cp_nbytes)
225#	define IOCTL	FIOCAPACITY
226#endif
227#ifdef FIONREAD
228	long b;
229#	define chars(b)	(b)
230#	define IOCTL	FIONREAD
231#endif
232	int already = 0;
233	char buf[10];
234
235retry:
236	if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0 && chars(b) > 0)
237		tcflush(FD, TCIOFLUSH);
238	write(fd, "\rp>\r", 4);
239	sleep(1);
240	if (ioctl(fd, IOCTL, (caddr_t)&b) >= 0) {
241		if (chars(b) != 10) {
242	nono:
243			if (already > MAXRETRY)
244				return (0);
245			write(fd, DISCONNECT_CMD, 4);
246			sleep(2);
247			already++;
248			goto retry;
249		} else {
250			read(fd, buf, 10);
251			if (strncmp(buf, "p >\r\n\r\n>", 8))
252				goto nono;
253		}
254	}
255	return (1);
256}
257