xref: /freebsd/usr.bin/tip/libacu/df.c (revision f126890ac5386406dadf7c4cfa9566cbb56537c5)
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 /*
36  * Dial the DF02-AC or DF03-AC
37  */
38 
39 #include "tip.h"
40 
41 static jmp_buf Sjbuf;
42 
43 static int	df_dialer(char *, char *, int);
44 static void	alrm_timeout(int);
45 
46 int
47 df02_dialer(char *num, char *acu)
48 {
49 	return (df_dialer(num, acu, 0));
50 }
51 
52 int
53 df03_dialer(char *num, char *acu)
54 {
55 	return (df_dialer(num, acu, 1));
56 }
57 
58 static int
59 df_dialer(char *num, char *acu, int df03)
60 {
61 	int f = FD;
62 	struct termios cntrl;
63 	int speed = 0;
64 	char c = '\0';
65 
66 	tcgetattr(f, &cntrl);
67 	cntrl.c_cflag |= HUPCL;
68 	tcsetattr(f, TCSANOW, &cntrl);
69 	if (setjmp(Sjbuf)) {
70 		printf("connection timed out\r\n");
71 		df_disconnect();
72 		return (0);
73 	}
74 	if (boolean(value(VERBOSE)))
75 		printf("\ndialing...");
76 	fflush(stdout);
77 #ifdef TIOCMSET
78 	if (df03) {
79 		int st = TIOCM_ST;	/* secondary Transmit flag */
80 
81 		tcgetattr(f, &cntrl);
82 		speed = cfgetospeed(&cntrl);
83 		if (speed != B1200) {	/* must dial at 1200 baud */
84 			cfsetospeed(&cntrl, B1200);
85 			cfsetispeed(&cntrl, B1200);
86 			tcsetattr(f, TCSAFLUSH, &cntrl);
87 			ioctl(f, TIOCMBIC, &st); /* clear ST for 300 baud */
88 		} else
89 			ioctl(f, TIOCMBIS, &st); /* set ST for 1200 baud */
90 	}
91 #endif
92 	signal(SIGALRM, alrm_timeout);
93 	alarm(5 * strlen(num) + 10);
94 	tcflush(f, TCIOFLUSH);
95 	write(f, "\001", 1);
96 	sleep(1);
97 	write(f, "\002", 1);
98 	write(f, num, strlen(num));
99 	read(f, &c, 1);
100 #ifdef TIOCMSET
101 	if (df03 && speed != B1200) {
102 		cfsetospeed(&cntrl, speed);
103 		cfsetispeed(&cntrl, speed);
104 		tcsetattr(f, TCSAFLUSH, &cntrl);
105 	}
106 #endif
107 	return (c == 'A');
108 }
109 
110 void
111 df_disconnect(void)
112 {
113 	write(FD, "\001", 1);
114 	sleep(1);
115 	tcflush(FD, TCIOFLUSH);
116 }
117 
118 void
119 df_abort(void)
120 {
121 	df_disconnect();
122 }
123 
124 /*ARGSUSED*/
125 static void
126 alrm_timeout(int signo)
127 {
128 	longjmp(Sjbuf, 1);
129 }
130