1 /* $OpenBSD: v831.c,v 1.11 2006/03/17 19:17:13 moritz Exp $ */
2 /* $NetBSD: v831.c,v 1.5 1996/12/29 10:42:01 cgd 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 * Routines for dialing up on Vadic 831
37 */
38 #include "tip.h"
39 #include <termios.h>
40
41 static jmp_buf jmpbuf;
42 static pid_t child = -1;
43
44 static void alarmtr(int);
45 static int dialit(char *, char *);
46 static char * sanitize(char *);
47
48 int
v831_dialer(char * num,char * acu)49 v831_dialer(char *num, char *acu)
50 {
51 int status;
52 int timelim;
53 pid_t pid;
54
55 if (boolean(value(VERBOSE)))
56 printf("\nstarting call...");
57 #ifdef DEBUG
58 printf ("(acu=%s)\n", acu);
59 #endif
60 if ((AC = open(acu, O_RDWR)) < 0) {
61 if (errno == EBUSY)
62 printf("line busy...");
63 else
64 printf("acu open error...");
65 return (0);
66 }
67 if (setjmp(jmpbuf)) {
68 kill(child, SIGKILL);
69 close(AC);
70 return (0);
71 }
72 signal(SIGALRM, alarmtr);
73 timelim = 5 * strlen(num);
74 alarm(timelim < 30 ? 30 : timelim);
75 if ((child = fork()) == 0) {
76 /*
77 * ignore this stuff for aborts
78 */
79 signal(SIGALRM, SIG_IGN);
80 signal(SIGINT, SIG_IGN);
81 signal(SIGQUIT, SIG_IGN);
82 sleep(2);
83 exit(dialit(num, acu) != 'A');
84 }
85 /*
86 * open line - will return on carrier
87 */
88 if ((FD = open(DV, O_RDWR)) < 0) {
89 #ifdef DEBUG
90 printf("(after open, errno=%d)\n", errno);
91 #endif
92 if (errno == EIO)
93 printf("lost carrier...");
94 else
95 printf("dialup line open failed...");
96 alarm(0);
97 kill(child, SIGKILL);
98 close(AC);
99 return (0);
100 }
101 alarm(0);
102 signal(SIGALRM, SIG_DFL);
103 while ((pid = wait(&status)) != child && pid != -1)
104 ;
105 if (status) {
106 close(AC);
107 return (0);
108 }
109 return (1);
110 }
111
112 /*ARGSUSED*/
113 static void
alarmtr(int signo)114 alarmtr(int signo)
115 {
116 alarm(0);
117 longjmp(jmpbuf, 1);
118 }
119
120 /*
121 * Insurance, for some reason we don't seem to be
122 * hanging up...
123 */
124 void
v831_disconnect(void)125 v831_disconnect(void)
126 {
127 struct termios cntrl;
128
129 sleep(2);
130 #ifdef DEBUG
131 printf("[disconnect: FD=%d]\n", FD);
132 #endif
133 if (FD > 0) {
134 ioctl(FD, TIOCCDTR, 0);
135 tcgetattr(FD, &cntrl);
136 cfsetospeed(&cntrl, 0);
137 cfsetispeed(&cntrl, 0);
138 tcsetattr(FD, TCSAFLUSH, &cntrl);
139 ioctl(FD, TIOCNXCL, NULL);
140 }
141 close(FD);
142 }
143
144 void
v831_abort(void)145 v831_abort(void)
146 {
147 #ifdef DEBUG
148 printf("[abort: AC=%d]\n", AC);
149 #endif
150 sleep(2);
151 if (child > 0)
152 kill(child, SIGKILL);
153 if (FD > 0)
154 ioctl(FD, TIOCNXCL, NULL);
155 close(AC);
156 if (FD > 0)
157 ioctl(FD, TIOCCDTR, 0);
158 close(FD);
159 }
160
161 /*
162 * Sigh, this probably must be changed at each site.
163 */
164 struct vaconfig {
165 char *vc_name;
166 char vc_rack;
167 char vc_modem;
168 } vaconfig[] = {
169 { "/dev/cua0",'4','0' },
170 { "/dev/cua1",'4','1' },
171 { NULL, '\0', '\0' }
172 };
173
174 #define pc(x) (c = x, write(AC,&c,1))
175 #define ABORT 01
176 #define SI 017
177 #define STX 02
178 #define ETX 03
179
180 static int
dialit(char * phonenum,char * acu)181 dialit(char *phonenum, char *acu)
182 {
183 struct vaconfig *vp;
184 struct termios cntrl;
185 char c;
186 int i;
187
188 phonenum = sanitize(phonenum);
189 #ifdef DEBUG
190 printf ("(dial phonenum=%s)\n", phonenum);
191 #endif
192 if (*phonenum == '<' && phonenum[1] == 0)
193 return ('Z');
194 for (vp = vaconfig; vp->vc_name; vp++)
195 if (strcmp(vp->vc_name, acu) == 0)
196 break;
197 if (vp->vc_name == 0) {
198 printf("Unable to locate dialer (%s)\n", acu);
199 return ('K');
200 }
201 tcgetattr(AC, &cntrl);
202 cfsetospeed(&cntrl, B2400);
203 cfsetispeed(&cntrl, B2400);
204 cntrl.c_cflag |= PARODD | PARENB;
205 cntrl.c_lflag &= ~(ISIG | ICANON);
206 tcsetattr(AC, TCSANOW, &cntrl);
207 tcflush(AC, TCIOFLUSH);
208 pc(STX);
209 pc(vp->vc_rack);
210 pc(vp->vc_modem);
211 while (*phonenum && *phonenum != '<')
212 pc(*phonenum++);
213 pc(SI);
214 pc(ETX);
215 sleep(1);
216 i = read(AC, &c, 1);
217 #ifdef DEBUG
218 printf("read %d chars, char=%c, errno %d\n", i, c, errno);
219 #endif
220 if (i != 1)
221 c = 'M';
222 if (c == 'B' || c == 'G') {
223 char cc, oc = c;
224
225 pc(ABORT);
226 read(AC, &cc, 1);
227 #ifdef DEBUG
228 printf("abort response=%c\n", cc);
229 #endif
230 c = oc;
231 v831_disconnect();
232 }
233 close(AC);
234 #ifdef DEBUG
235 printf("dialit: returns %c\n", c);
236 #endif
237 return (c);
238 }
239
240 static char *
sanitize(char * s)241 sanitize(char *s)
242 {
243 static char buf[128];
244 char *cp;
245
246 for (cp = buf; *s; s++) {
247 if (!isdigit(*s) && *s == '<' && *s != '_')
248 continue;
249 if (*s == '_')
250 *s = '=';
251 *cp++ = *s;
252 }
253 *cp++ = 0;
254 return (buf);
255 }
256