1 /*
2 * Copyright (c) 1986 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #ifndef lint
35 static char sccsid[] = "@(#)courier.c 5.7 (Berkeley) 3/2/91";
36 #endif /* not lint */
37
38 /*
39 * Routines for calling up on a Courier modem.
40 * Derived from Hayes driver.
41 */
42 #include "tip.h"
43 #include <stdio.h>
44
45 #define MAXRETRY 5
46
47 static void sigALRM();
48 static int timeout = 0;
49 static int connected = 0;
50 static jmp_buf timeoutbuf, intbuf;
51 static int coursync();
52
cour_dialer(num,acu)53 cour_dialer(num, acu)
54 register char *num;
55 char *acu;
56 {
57 register char *cp;
58 #ifdef ACULOG
59 char line[80];
60 #endif
61 static int cour_connect(), cour_swallow();
62
63 if (boolean(value(VERBOSE)))
64 printf("Using \"%s\"\n", acu);
65
66 ioctl(FD, TIOCHPCL, 0);
67 /*
68 * Get in synch.
69 */
70 if (!coursync()) {
71 badsynch:
72 printf("can't synchronize with courier\n");
73 #ifdef ACULOG
74 logent(value(HOST), num, "courier", "can't synch up");
75 #endif
76 return (0);
77 }
78 cour_write(FD, "AT E0\r", 6); /* turn off echoing */
79 sleep(1);
80 #ifdef DEBUG
81 if (boolean(value(VERBOSE)))
82 verbose_read();
83 #endif
84 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
85 cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
86 if (!cour_swallow("\r\nOK\r\n"))
87 goto badsynch;
88 fflush(stdout);
89 cour_write(FD, "AT D", 4);
90 for (cp = num; *cp; cp++)
91 if (*cp == '=')
92 *cp = ',';
93 cour_write(FD, num, strlen(num));
94 cour_write(FD, "\r", 1);
95 connected = cour_connect();
96 #ifdef ACULOG
97 if (timeout) {
98 sprintf(line, "%d second dial timeout",
99 number(value(DIALTIMEOUT)));
100 logent(value(HOST), num, "cour", line);
101 }
102 #endif
103 if (timeout)
104 cour_disconnect();
105 return (connected);
106 }
107
cour_disconnect()108 cour_disconnect()
109 {
110 /* first hang up the modem*/
111 ioctl(FD, TIOCCDTR, 0);
112 sleep(1);
113 ioctl(FD, TIOCSDTR, 0);
114 coursync(); /* reset */
115 close(FD);
116 }
117
cour_abort()118 cour_abort()
119 {
120 cour_write(FD, "\r", 1); /* send anything to abort the call */
121 cour_disconnect();
122 }
123
124 static void
sigALRM()125 sigALRM()
126 {
127 printf("\07timeout waiting for reply\n");
128 timeout = 1;
129 longjmp(timeoutbuf, 1);
130 }
131
132 static int
cour_swallow(match)133 cour_swallow(match)
134 register char *match;
135 {
136 sig_t f;
137 char c;
138
139 f = signal(SIGALRM, sigALRM);
140 timeout = 0;
141 do {
142 if (*match =='\0') {
143 signal(SIGALRM, f);
144 return (1);
145 }
146 if (setjmp(timeoutbuf)) {
147 signal(SIGALRM, f);
148 return (0);
149 }
150 alarm(number(value(DIALTIMEOUT)));
151 read(FD, &c, 1);
152 alarm(0);
153 c &= 0177;
154 #ifdef DEBUG
155 if (boolean(value(VERBOSE)))
156 putchar(c);
157 #endif
158 } while (c == *match++);
159 #ifdef DEBUG
160 if (boolean(value(VERBOSE)))
161 fflush(stdout);
162 #endif
163 signal(SIGALRM, SIG_DFL);
164 return (0);
165 }
166
167 struct baud_msg {
168 char *msg;
169 int baud;
170 } baud_msg[] = {
171 "", B300,
172 " 1200", B1200,
173 " 2400", B2400,
174 0, 0,
175 };
176
177 static int
cour_connect()178 cour_connect()
179 {
180 char c;
181 int nc, nl, n;
182 struct sgttyb sb;
183 char dialer_buf[64];
184 struct baud_msg *bm;
185 sig_t f;
186
187 if (cour_swallow("\r\n") == 0)
188 return (0);
189 f = signal(SIGALRM, sigALRM);
190 again:
191 nc = 0; nl = sizeof(dialer_buf)-1;
192 bzero(dialer_buf, sizeof(dialer_buf));
193 timeout = 0;
194 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
195 if (setjmp(timeoutbuf))
196 break;
197 alarm(number(value(DIALTIMEOUT)));
198 n = read(FD, &c, 1);
199 alarm(0);
200 if (n <= 0)
201 break;
202 c &= 0x7f;
203 if (c == '\r') {
204 if (cour_swallow("\n") == 0)
205 break;
206 if (!dialer_buf[0])
207 goto again;
208 if (strcmp(dialer_buf, "RINGING") == 0 &&
209 boolean(value(VERBOSE))) {
210 #ifdef DEBUG
211 printf("%s\r\n", dialer_buf);
212 #endif
213 goto again;
214 }
215 if (strncmp(dialer_buf, "CONNECT",
216 sizeof("CONNECT")-1) != 0)
217 break;
218 for (bm = baud_msg ; bm ; bm++)
219 if (strcmp(bm->msg,
220 dialer_buf+sizeof("CONNECT")-1) == 0) {
221 if (ioctl(FD, TIOCGETP, &sb) < 0) {
222 perror("TIOCGETP");
223 goto error;
224 }
225 sb.sg_ispeed = sb.sg_ospeed = bm->baud;
226 if (ioctl(FD, TIOCSETP, &sb) < 0) {
227 perror("TIOCSETP");
228 goto error;
229 }
230 signal(SIGALRM, f);
231 #ifdef DEBUG
232 if (boolean(value(VERBOSE)))
233 printf("%s\r\n", dialer_buf);
234 #endif
235 return (1);
236 }
237 break;
238 }
239 dialer_buf[nc] = c;
240 #ifdef notdef
241 if (boolean(value(VERBOSE)))
242 putchar(c);
243 #endif
244 }
245 error1:
246 printf("%s\r\n", dialer_buf);
247 error:
248 signal(SIGALRM, f);
249 return (0);
250 }
251
252 /*
253 * This convoluted piece of code attempts to get
254 * the courier in sync.
255 */
256 static int
coursync()257 coursync()
258 {
259 int already = 0;
260 int len;
261 char buf[40];
262
263 while (already++ < MAXRETRY) {
264 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
265 cour_write(FD, "\rAT Z\r", 6); /* reset modem */
266 bzero(buf, sizeof(buf));
267 sleep(1);
268 ioctl(FD, FIONREAD, &len);
269 if (len) {
270 len = read(FD, buf, sizeof(buf));
271 #ifdef DEBUG
272 buf[len] = '\0';
273 printf("coursync: (\"%s\")\n\r", buf);
274 #endif
275 if (index(buf, '0') ||
276 (index(buf, 'O') && index(buf, 'K')))
277 return(1);
278 }
279 /*
280 * If not strapped for DTR control,
281 * try to get command mode.
282 */
283 sleep(1);
284 cour_write(FD, "+++", 3);
285 sleep(1);
286 /*
287 * Toggle DTR to force anyone off that might have left
288 * the modem connected.
289 */
290 ioctl(FD, TIOCCDTR, 0);
291 sleep(1);
292 ioctl(FD, TIOCSDTR, 0);
293 }
294 cour_write(FD, "\rAT Z\r", 6);
295 return (0);
296 }
297
cour_write(fd,cp,n)298 cour_write(fd, cp, n)
299 int fd;
300 char *cp;
301 int n;
302 {
303 struct sgttyb sb;
304 #ifdef notdef
305 if (boolean(value(VERBOSE)))
306 write(1, cp, n);
307 #endif
308 ioctl(fd, TIOCGETP, &sb);
309 ioctl(fd, TIOCSETP, &sb);
310 cour_nap();
311 for ( ; n-- ; cp++) {
312 write(fd, cp, 1);
313 ioctl(fd, TIOCGETP, &sb);
314 ioctl(fd, TIOCSETP, &sb);
315 cour_nap();
316 }
317 }
318
319 #ifdef DEBUG
verbose_read()320 verbose_read()
321 {
322 int n = 0;
323 char buf[BUFSIZ];
324
325 if (ioctl(FD, FIONREAD, &n) < 0)
326 return;
327 if (n <= 0)
328 return;
329 if (read(FD, buf, n) != n)
330 return;
331 write(1, buf, n);
332 }
333 #endif
334
335 /*
336 * Code stolen from /usr/src/lib/libc/gen/sleep.c
337 */
338 #define mask(s) (1<<((s)-1))
339 #define setvec(vec, a) \
340 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
341
342 static napms = 50; /* Give the courier 50 milliseconds between characters */
343
344 static int ringring;
345
cour_nap()346 cour_nap()
347 {
348
349 static void cour_napx();
350 int omask;
351 struct itimerval itv, oitv;
352 register struct itimerval *itp = &itv;
353 struct sigvec vec, ovec;
354
355 timerclear(&itp->it_interval);
356 timerclear(&itp->it_value);
357 if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
358 return;
359 setvec(ovec, SIG_DFL);
360 omask = sigblock(mask(SIGALRM));
361 itp->it_value.tv_sec = napms/1000;
362 itp->it_value.tv_usec = ((napms%1000)*1000);
363 setvec(vec, cour_napx);
364 ringring = 0;
365 (void) sigvec(SIGALRM, &vec, &ovec);
366 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
367 while (!ringring)
368 sigpause(omask &~ mask(SIGALRM));
369 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
370 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
371 (void) sigsetmask(omask);
372 }
373
374 static void
cour_napx()375 cour_napx()
376 {
377 ringring = 1;
378 }
379