df.c revision 330897 
1/*	$OpenBSD: df.c,v 1.9 2006/03/17 19:17:13 moritz Exp $	*/
2/*	$NetBSD: df.c,v 1.4 1995/10/29 00:49:51 pk 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: stable/11/usr.bin/tip/libacu/df.c 330897 2018-03-14 03:19:51Z eadler $");
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)df.c	8.1 (Berkeley) 6/6/93";
41static const char rcsid[] = "$OpenBSD: df.c,v 1.9 2006/03/17 19:17:13 moritz Exp $";
42#endif
43#endif /* not lint */
44
45/*
46 * Dial the DF02-AC or DF03-AC
47 */
48
49#include "tip.h"
50
51static jmp_buf Sjbuf;
52
53static int	df_dialer(char *, char *, int);
54static void	alrm_timeout(int);
55
56int
57df02_dialer(char *num, char *acu)
58{
59	return (df_dialer(num, acu, 0));
60}
61
62int
63df03_dialer(char *num, char *acu)
64{
65	return (df_dialer(num, acu, 1));
66}
67
68static int
69df_dialer(char *num, char *acu, int df03)
70{
71	int f = FD;
72	struct termios cntrl;
73	int speed = 0;
74	char c = '\0';
75
76	tcgetattr(f, &cntrl);
77	cntrl.c_cflag |= HUPCL;
78	tcsetattr(f, TCSANOW, &cntrl);
79	if (setjmp(Sjbuf)) {
80		printf("connection timed out\r\n");
81		df_disconnect();
82		return (0);
83	}
84	if (boolean(value(VERBOSE)))
85		printf("\ndialing...");
86	fflush(stdout);
87#ifdef TIOCMSET
88	if (df03) {
89		int st = TIOCM_ST;	/* secondary Transmit flag */
90
91		tcgetattr(f, &cntrl);
92		speed = cfgetospeed(&cntrl);
93		if (speed != B1200) {	/* must dial at 1200 baud */
94			cfsetospeed(&cntrl, B1200);
95			cfsetispeed(&cntrl, B1200);
96			tcsetattr(f, TCSAFLUSH, &cntrl);
97			ioctl(f, TIOCMBIC, &st); /* clear ST for 300 baud */
98		} else
99			ioctl(f, TIOCMBIS, &st); /* set ST for 1200 baud */
100	}
101#endif
102	signal(SIGALRM, alrm_timeout);
103	alarm(5 * strlen(num) + 10);
104	tcflush(f, TCIOFLUSH);
105	write(f, "\001", 1);
106	sleep(1);
107	write(f, "\002", 1);
108	write(f, num, strlen(num));
109	read(f, &c, 1);
110#ifdef TIOCMSET
111	if (df03 && speed != B1200) {
112		cfsetospeed(&cntrl, speed);
113		cfsetispeed(&cntrl, speed);
114		tcsetattr(f, TCSAFLUSH, &cntrl);
115	}
116#endif
117	return (c == 'A');
118}
119
120void
121df_disconnect(void)
122{
123	write(FD, "\001", 1);
124	sleep(1);
125	tcflush(FD, TCIOFLUSH);
126}
127
128void
129df_abort(void)
130{
131	df_disconnect();
132}
133
134/*ARGSUSED*/
135static void
136alrm_timeout(int signo)
137{
138	longjmp(Sjbuf, 1);
139}
140