1 /*
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #ifndef lint
9 static char sccsid[] = "@(#)t3000.c 8.1 (Berkeley) 06/06/93";
10 #endif /* not lint */
11
12 /*
13 * Routines for calling up on a Telebit T3000 modem.
14 * Derived from Courier driver.
15 */
16 #include "tip.h"
17 #include <stdio.h>
18
19 #define MAXRETRY 5
20
21 static void sigALRM();
22 static int timeout = 0;
23 static int connected = 0;
24 static jmp_buf timeoutbuf, intbuf;
25 static int t3000_sync();
26
t3000_dialer(num,acu)27 t3000_dialer(num, acu)
28 register char *num;
29 char *acu;
30 {
31 register char *cp;
32 #ifdef ACULOG
33 char line[80];
34 #endif
35 static int t3000_connect(), t3000_swallow();
36
37 if (boolean(value(VERBOSE)))
38 printf("Using \"%s\"\n", acu);
39
40 ioctl(FD, TIOCHPCL, 0);
41 /*
42 * Get in synch.
43 */
44 if (!t3000_sync()) {
45 badsynch:
46 printf("can't synchronize with t3000\n");
47 #ifdef ACULOG
48 logent(value(HOST), num, "t3000", "can't synch up");
49 #endif
50 return (0);
51 }
52 t3000_write(FD, "AT E0\r", 6); /* turn off echoing */
53 sleep(1);
54 #ifdef DEBUG
55 if (boolean(value(VERBOSE)))
56 t3000_verbose_read();
57 #endif
58 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
59 t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18);
60 if (!t3000_swallow("\r\nOK\r\n"))
61 goto badsynch;
62 fflush(stdout);
63 t3000_write(FD, "AT D", 4);
64 for (cp = num; *cp; cp++)
65 if (*cp == '=')
66 *cp = ',';
67 t3000_write(FD, num, strlen(num));
68 t3000_write(FD, "\r", 1);
69 connected = t3000_connect();
70 #ifdef ACULOG
71 if (timeout) {
72 sprintf(line, "%d second dial timeout",
73 number(value(DIALTIMEOUT)));
74 logent(value(HOST), num, "t3000", line);
75 }
76 #endif
77 if (timeout)
78 t3000_disconnect();
79 return (connected);
80 }
81
t3000_disconnect()82 t3000_disconnect()
83 {
84 /* first hang up the modem*/
85 ioctl(FD, TIOCCDTR, 0);
86 sleep(1);
87 ioctl(FD, TIOCSDTR, 0);
88 t3000_sync(); /* reset */
89 close(FD);
90 }
91
t3000_abort()92 t3000_abort()
93 {
94 t3000_write(FD, "\r", 1); /* send anything to abort the call */
95 t3000_disconnect();
96 }
97
98 static void
sigALRM()99 sigALRM()
100 {
101 printf("\07timeout waiting for reply\n");
102 timeout = 1;
103 longjmp(timeoutbuf, 1);
104 }
105
106 static int
t3000_swallow(match)107 t3000_swallow(match)
108 register char *match;
109 {
110 sig_t f;
111 char c;
112
113 f = signal(SIGALRM, sigALRM);
114 timeout = 0;
115 do {
116 if (*match =='\0') {
117 signal(SIGALRM, f);
118 return (1);
119 }
120 if (setjmp(timeoutbuf)) {
121 signal(SIGALRM, f);
122 return (0);
123 }
124 alarm(number(value(DIALTIMEOUT)));
125 read(FD, &c, 1);
126 alarm(0);
127 c &= 0177;
128 #ifdef DEBUG
129 if (boolean(value(VERBOSE)))
130 putchar(c);
131 #endif
132 } while (c == *match++);
133 #ifdef DEBUG
134 if (boolean(value(VERBOSE)))
135 fflush(stdout);
136 #endif
137 signal(SIGALRM, SIG_DFL);
138 return (0);
139 }
140
141 #ifndef B19200 /* XXX */
142 #define B19200 EXTA
143 #define B38400 EXTB
144 #endif
145
146 struct tbaud_msg {
147 char *msg;
148 int baud;
149 int baud2;
150 } tbaud_msg[] = {
151 "", B300, 0,
152 " 1200", B1200, 0,
153 " 2400", B2400, 0,
154 " 4800", B4800, 0,
155 " 9600", B9600, 0,
156 " 14400", B19200, B9600,
157 " 19200", B19200, B9600,
158 " 38400", B38400, B9600,
159 " 57600", B38400, B9600,
160 " 7512", B9600, 0,
161 " 1275", B2400, 0,
162 " 7200", B9600, 0,
163 " 12000", B19200, B9600,
164 0, 0, 0,
165 };
166
167 static int
t3000_connect()168 t3000_connect()
169 {
170 char c;
171 int nc, nl, n;
172 struct sgttyb sb;
173 char dialer_buf[64];
174 struct tbaud_msg *bm;
175 sig_t f;
176
177 if (t3000_swallow("\r\n") == 0)
178 return (0);
179 f = signal(SIGALRM, sigALRM);
180 again:
181 nc = 0; nl = sizeof(dialer_buf)-1;
182 bzero(dialer_buf, sizeof(dialer_buf));
183 timeout = 0;
184 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
185 if (setjmp(timeoutbuf))
186 break;
187 alarm(number(value(DIALTIMEOUT)));
188 n = read(FD, &c, 1);
189 alarm(0);
190 if (n <= 0)
191 break;
192 c &= 0x7f;
193 if (c == '\r') {
194 if (t3000_swallow("\n") == 0)
195 break;
196 if (!dialer_buf[0])
197 goto again;
198 if (strcmp(dialer_buf, "RINGING") == 0 &&
199 boolean(value(VERBOSE))) {
200 #ifdef DEBUG
201 printf("%s\r\n", dialer_buf);
202 #endif
203 goto again;
204 }
205 if (strncmp(dialer_buf, "CONNECT",
206 sizeof("CONNECT")-1) != 0)
207 break;
208 for (bm = tbaud_msg ; bm->msg ; bm++)
209 if (strcmp(bm->msg,
210 dialer_buf+sizeof("CONNECT")-1) == 0) {
211 if (ioctl(FD, TIOCGETP, &sb) < 0) {
212 perror("TIOCGETP");
213 goto error;
214 }
215 sb.sg_ispeed = sb.sg_ospeed = bm->baud;
216 if (ioctl(FD, TIOCSETP, &sb) < 0) {
217 if (bm->baud2) {
218 sb.sg_ispeed =
219 sb.sg_ospeed =
220 bm->baud2;
221 if (ioctl(FD,
222 TIOCSETP,
223 &sb) >= 0)
224 goto isok;
225 }
226 perror("TIOCSETP");
227 goto error;
228 }
229 isok:
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 t3000 in sync.
255 */
256 static int
t3000_sync()257 t3000_sync()
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 t3000_write(FD, "\rAT Z\r", 6); /* reset modem */
266 bzero(buf, sizeof(buf));
267 sleep(2);
268 ioctl(FD, FIONREAD, &len);
269 #if 1
270 if (len == 0) len = 1;
271 #endif
272 if (len) {
273 len = read(FD, buf, sizeof(buf));
274 #ifdef DEBUG
275 buf[len] = '\0';
276 printf("t3000_sync: (\"%s\")\n\r", buf);
277 #endif
278 if (index(buf, '0') ||
279 (index(buf, 'O') && index(buf, 'K')))
280 return(1);
281 }
282 /*
283 * If not strapped for DTR control,
284 * try to get command mode.
285 */
286 sleep(1);
287 t3000_write(FD, "+++", 3);
288 sleep(1);
289 /*
290 * Toggle DTR to force anyone off that might have left
291 * the modem connected.
292 */
293 ioctl(FD, TIOCCDTR, 0);
294 sleep(1);
295 ioctl(FD, TIOCSDTR, 0);
296 }
297 t3000_write(FD, "\rAT Z\r", 6);
298 return (0);
299 }
300
t3000_write(fd,cp,n)301 t3000_write(fd, cp, n)
302 int fd;
303 char *cp;
304 int n;
305 {
306 struct sgttyb sb;
307
308 #ifdef notdef
309 if (boolean(value(VERBOSE)))
310 write(1, cp, n);
311 #endif
312 ioctl(fd, TIOCGETP, &sb);
313 ioctl(fd, TIOCSETP, &sb);
314 t3000_nap();
315 for ( ; n-- ; cp++) {
316 write(fd, cp, 1);
317 ioctl(fd, TIOCGETP, &sb);
318 ioctl(fd, TIOCSETP, &sb);
319 t3000_nap();
320 }
321 }
322
323 #ifdef DEBUG
t3000_verbose_read()324 t3000_verbose_read()
325 {
326 int n = 0;
327 char buf[BUFSIZ];
328
329 if (ioctl(FD, FIONREAD, &n) < 0)
330 return;
331 if (n <= 0)
332 return;
333 if (read(FD, buf, n) != n)
334 return;
335 write(1, buf, n);
336 }
337 #endif
338
339 /*
340 * Code stolen from /usr/src/lib/libc/gen/sleep.c
341 */
342 #define mask(s) (1<<((s)-1))
343 #define setvec(vec, a) \
344 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
345
346 static napms = 50; /* Give the t3000 50 milliseconds between characters */
347
348 static int ringring;
349
t3000_nap()350 t3000_nap()
351 {
352
353 static void t3000_napx();
354 int omask;
355 struct itimerval itv, oitv;
356 register struct itimerval *itp = &itv;
357 struct sigvec vec, ovec;
358
359 timerclear(&itp->it_interval);
360 timerclear(&itp->it_value);
361 if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
362 return;
363 setvec(ovec, SIG_DFL);
364 omask = sigblock(mask(SIGALRM));
365 itp->it_value.tv_sec = napms/1000;
366 itp->it_value.tv_usec = ((napms%1000)*1000);
367 setvec(vec, t3000_napx);
368 ringring = 0;
369 (void) sigvec(SIGALRM, &vec, &ovec);
370 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
371 while (!ringring)
372 sigpause(omask &~ mask(SIGALRM));
373 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
374 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
375 (void) sigsetmask(omask);
376 }
377
378 static void
t3000_napx()379 t3000_napx()
380 {
381 ringring = 1;
382 }
383