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 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #ifndef lint
37 #if 0
38 static char sccsid[] = "@(#)v831.c 8.1 (Berkeley) 6/6/93";
39 static const char rcsid[] = "$OpenBSD: v831.c,v 1.11 2006/03/17 19:17:13 moritz Exp $";
40 #endif
41 #endif /* not lint */
42
43 /*
44 * Routines for dialing up on Vadic 831
45 */
46 #include "tip.h"
47 #include <termios.h>
48
49 static jmp_buf jmpbuf;
50 static pid_t child = -1;
51
52 static void alarmtr(int);
53 static int dialit(char *, char *);
54 static char * sanitize(char *);
55
56 int
v831_dialer(char * num,char * acu)57 v831_dialer(char *num, char *acu)
58 {
59 int status;
60 int timelim;
61 pid_t pid;
62
63 if (boolean(value(VERBOSE)))
64 printf("\nstarting call...");
65 #ifdef DEBUG
66 printf ("(acu=%s)\n", acu);
67 #endif
68 if ((AC = open(acu, O_RDWR)) < 0) {
69 if (errno == EBUSY)
70 printf("line busy...");
71 else
72 printf("acu open error...");
73 return (0);
74 }
75 if (setjmp(jmpbuf)) {
76 kill(child, SIGKILL);
77 close(AC);
78 return (0);
79 }
80 signal(SIGALRM, alarmtr);
81 timelim = 5 * strlen(num);
82 alarm(timelim < 30 ? 30 : timelim);
83 if ((child = fork()) == 0) {
84 /*
85 * ignore this stuff for aborts
86 */
87 signal(SIGALRM, SIG_IGN);
88 signal(SIGINT, SIG_IGN);
89 signal(SIGQUIT, SIG_IGN);
90 sleep(2);
91 exit(dialit(num, acu) != 'A');
92 }
93 /*
94 * open line - will return on carrier
95 */
96 if ((FD = open(DV, O_RDWR)) < 0) {
97 #ifdef DEBUG
98 printf("(after open, errno=%d)\n", errno);
99 #endif
100 if (errno == EIO)
101 printf("lost carrier...");
102 else
103 printf("dialup line open failed...");
104 alarm(0);
105 kill(child, SIGKILL);
106 close(AC);
107 return (0);
108 }
109 alarm(0);
110 signal(SIGALRM, SIG_DFL);
111 while ((pid = wait(&status)) != child && pid != -1)
112 ;
113 if (status) {
114 close(AC);
115 return (0);
116 }
117 return (1);
118 }
119
120 /*ARGSUSED*/
121 static void
alarmtr(int signo)122 alarmtr(int signo)
123 {
124 alarm(0);
125 longjmp(jmpbuf, 1);
126 }
127
128 /*
129 * Insurance, for some reason we don't seem to be
130 * hanging up...
131 */
132 void
v831_disconnect(void)133 v831_disconnect(void)
134 {
135 struct termios cntrl;
136
137 sleep(2);
138 #ifdef DEBUG
139 printf("[disconnect: FD=%d]\n", FD);
140 #endif
141 if (FD > 0) {
142 ioctl(FD, TIOCCDTR, 0);
143 tcgetattr(FD, &cntrl);
144 cfsetospeed(&cntrl, 0);
145 cfsetispeed(&cntrl, 0);
146 tcsetattr(FD, TCSAFLUSH, &cntrl);
147 ioctl(FD, TIOCNXCL, NULL);
148 }
149 close(FD);
150 }
151
152 void
v831_abort(void)153 v831_abort(void)
154 {
155 #ifdef DEBUG
156 printf("[abort: AC=%d]\n", AC);
157 #endif
158 sleep(2);
159 if (child > 0)
160 kill(child, SIGKILL);
161 if (FD > 0)
162 ioctl(FD, TIOCNXCL, NULL);
163 close(AC);
164 if (FD > 0)
165 ioctl(FD, TIOCCDTR, 0);
166 close(FD);
167 }
168
169 /*
170 * Sigh, this probably must be changed at each site.
171 */
172 struct vaconfig {
173 char *vc_name;
174 char vc_rack;
175 char vc_modem;
176 } vaconfig[] = {
177 { "/dev/cua0",'4','0' },
178 { "/dev/cua1",'4','1' },
179 { NULL, '\0', '\0' }
180 };
181
182 #define pc(x) (c = x, write(AC,&c,1))
183 #define ABORT 01
184 #define SI 017
185 #define STX 02
186 #define ETX 03
187
188 static int
dialit(char * phonenum,char * acu)189 dialit(char *phonenum, char *acu)
190 {
191 struct vaconfig *vp;
192 struct termios cntrl;
193 char c;
194 int i;
195
196 phonenum = sanitize(phonenum);
197 #ifdef DEBUG
198 printf ("(dial phonenum=%s)\n", phonenum);
199 #endif
200 if (*phonenum == '<' && phonenum[1] == 0)
201 return ('Z');
202 for (vp = vaconfig; vp->vc_name; vp++)
203 if (strcmp(vp->vc_name, acu) == 0)
204 break;
205 if (vp->vc_name == 0) {
206 printf("Unable to locate dialer (%s)\n", acu);
207 return ('K');
208 }
209 tcgetattr(AC, &cntrl);
210 cfsetospeed(&cntrl, B2400);
211 cfsetispeed(&cntrl, B2400);
212 cntrl.c_cflag |= PARODD | PARENB;
213 cntrl.c_lflag &= ~(ISIG | ICANON);
214 tcsetattr(AC, TCSANOW, &cntrl);
215 tcflush(AC, TCIOFLUSH);
216 pc(STX);
217 pc(vp->vc_rack);
218 pc(vp->vc_modem);
219 while (*phonenum && *phonenum != '<')
220 pc(*phonenum++);
221 pc(SI);
222 pc(ETX);
223 sleep(1);
224 i = read(AC, &c, 1);
225 #ifdef DEBUG
226 printf("read %d chars, char=%c, errno %d\n", i, c, errno);
227 #endif
228 if (i != 1)
229 c = 'M';
230 if (c == 'B' || c == 'G') {
231 char cc, oc = c;
232
233 pc(ABORT);
234 read(AC, &cc, 1);
235 #ifdef DEBUG
236 printf("abort response=%c\n", cc);
237 #endif
238 c = oc;
239 v831_disconnect();
240 }
241 close(AC);
242 #ifdef DEBUG
243 printf("dialit: returns %c\n", c);
244 #endif
245 return (c);
246 }
247
248 static char *
sanitize(char * s)249 sanitize(char *s)
250 {
251 static char buf[128];
252 char *cp;
253
254 for (cp = buf; *s; s++) {
255 if (!isdigit(*s) && *s == '<' && *s != '_')
256 continue;
257 if (*s == '_')
258 *s = '=';
259 *cp++ = *s;
260 }
261 *cp++ = 0;
262 return (buf);
263 }
264