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- /*
- * Copyright (c) 1986 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)courier.c 5.3 (Berkeley) 9/13/88";
- #endif /* not lint */
-
- #define write cour_write
- /*
- * Routines for calling up on a Courier modem.
- * Derived from Hayes driver.
- */
- #include "tip.h"
- #include <stdio.h>
-
- #define MAXRETRY 5
-
- static int sigALRM();
- static int timeout = 0;
- static int connected = 0;
- static jmp_buf timeoutbuf, intbuf;
- static int (*osigint)();
-
- cour_dialer(num, acu)
- register char *num;
- char *acu;
- {
- register char *cp;
- #ifdef ACULOG
- char line[80];
- #endif
- if (boolean(value(VERBOSE)))
- printf("Using \"%s\"\n", acu);
-
- ioctl(FD, TIOCHPCL, 0);
- /*
- * Get in synch.
- */
- if (!coursync()) {
- badsynch:
- printf("can't synchronize with courier\n");
- #ifdef ACULOG
- logent(value(HOST), num, "courier", "can't synch up");
- #endif
- return (0);
- }
- write(FD, "AT E0\r", 6); /* turn off echoing */
- sleep(1);
- #ifdef DEBUG
- if (boolean(value(VERBOSE)))
- verbose_read();
- #endif
- ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
- write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
- if (!cour_swallow("\r\nOK\r\n"))
- goto badsynch;
- fflush(stdout);
- write(FD, "AT D", 4);
- for (cp = num; *cp; cp++)
- if (*cp == '=')
- *cp = ',';
- write(FD, num, strlen(num));
- write(FD, "\r", 1);
- connected = cour_connect();
- #ifdef ACULOG
- if (timeout) {
- sprintf(line, "%d second dial timeout",
- number(value(DIALTIMEOUT)));
- logent(value(HOST), num, "cour", line);
- }
- #endif
- if (timeout)
- cour_disconnect();
- return (connected);
- }
-
- cour_disconnect()
- {
- /* first hang up the modem*/
- ioctl(FD, TIOCCDTR, 0);
- sleep(1);
- ioctl(FD, TIOCSDTR, 0);
- coursync(); /* reset */
- close(FD);
- }
-
- cour_abort()
- {
- write(FD, "\r", 1); /* send anything to abort the call */
- cour_disconnect();
- }
-
- static int
- sigALRM()
- {
- printf("\07timeout waiting for reply\n");
- timeout = 1;
- longjmp(timeoutbuf, 1);
- }
-
- static int
- cour_swallow(match)
- register char *match;
- {
- char c;
- sigfunc_t (*f)();
-
- f = signal(SIGALRM, sigALRM);
- timeout = 0;
- do {
- if (*match =='\0') {
- signal(SIGALRM, f);
- return (1);
- }
- if (setjmp(timeoutbuf)) {
- signal(SIGALRM, f);
- return (0);
- }
- alarm(number(value(DIALTIMEOUT)));
- read(FD, &c, 1);
- alarm(0);
- c &= 0177;
- #ifdef DEBUG
- if (boolean(value(VERBOSE)))
- putchar(c);
- #endif
- } while (c == *match++);
- #ifdef DEBUG
- if (boolean(value(VERBOSE)))
- fflush(stdout);
- #endif
- signal(SIGALRM, SIG_DFL);
- return (0);
- }
-
- struct baud_msg {
- char *msg;
- int baud;
- } baud_msg[] = {
- "", B300,
- " 1200", B1200,
- " 2400", B2400,
- 0, 0,
- };
-
- static int
- cour_connect()
- {
- char c;
- int nc, nl, n;
- struct sgttyb sb;
- char dialer_buf[64];
- struct baud_msg *bm;
- sigfunc_t (*f)();
-
- if (cour_swallow("\r\n") == 0)
- return (0);
- f = signal(SIGALRM, sigALRM);
- again:
- nc = 0; nl = sizeof(dialer_buf)-1;
- bzero(dialer_buf, sizeof(dialer_buf));
- timeout = 0;
- for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
- if (setjmp(timeoutbuf))
- break;
- alarm(number(value(DIALTIMEOUT)));
- n = read(FD, &c, 1);
- alarm(0);
- if (n <= 0)
- break;
- c &= 0x7f;
- if (c == '\r') {
- if (cour_swallow("\n") == 0)
- break;
- if (!dialer_buf[0])
- goto again;
- if (strcmp(dialer_buf, "RINGING") == 0 &&
- boolean(value(VERBOSE))) {
- #ifdef DEBUG
- printf("%s\r\n", dialer_buf);
- #endif
- goto again;
- }
- if (strncmp(dialer_buf, "CONNECT",
- sizeof("CONNECT")-1) != 0)
- break;
- for (bm = baud_msg ; bm ; bm++)
- if (strcmp(bm->msg,
- dialer_buf+sizeof("CONNECT")-1) == 0) {
- if (ioctl(FD, TIOCGETP, &sb) < 0) {
- perror("TIOCGETP");
- goto error;
- }
- sb.sg_ispeed = sb.sg_ospeed = bm->baud;
- if (ioctl(FD, TIOCSETP, &sb) < 0) {
- perror("TIOCSETP");
- goto error;
- }
- signal(SIGALRM, f);
- #ifdef DEBUG
- if (boolean(value(VERBOSE)))
- printf("%s\r\n", dialer_buf);
- #endif
- return (1);
- }
- break;
- }
- dialer_buf[nc] = c;
- #ifdef notdef
- if (boolean(value(VERBOSE)))
- putchar(c);
- #endif
- }
- error1:
- printf("%s\r\n", dialer_buf);
- error:
- signal(SIGALRM, f);
- return (0);
- }
-
- /*
- * This convoluted piece of code attempts to get
- * the courier in sync.
- */
- static int
- coursync()
- {
- int already = 0;
- int len;
- char buf[40];
-
- while (already++ < MAXRETRY) {
- ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
- write(FD, "\rAT Z\r", 6); /* reset modem */
- bzero(buf, sizeof(buf));
- sleep(1);
- ioctl(FD, FIONREAD, &len);
- if (len) {
- len = read(FD, buf, sizeof(buf));
- #ifdef DEBUG
- buf[len] = '\0';
- printf("coursync: (\"%s\")\n\r", buf);
- #endif
- if (index(buf, '0') ||
- (index(buf, 'O') && index(buf, 'K')))
- return(1);
- }
- /*
- * If not strapped for DTR control,
- * try to get command mode.
- */
- sleep(1);
- write(FD, "+++", 3);
- sleep(1);
- /*
- * Toggle DTR to force anyone off that might have left
- * the modem connected.
- */
- ioctl(FD, TIOCCDTR, 0);
- sleep(1);
- ioctl(FD, TIOCSDTR, 0);
- }
- write(FD, "\rAT Z\r", 6);
- return (0);
- }
-
- #undef write
-
- cour_write(fd, cp, n)
- int fd;
- char *cp;
- int n;
- {
- struct sgttyb sb;
- #ifdef notdef
- if (boolean(value(VERBOSE)))
- write(1, cp, n);
- #endif
- ioctl(fd, TIOCGETP, &sb);
- ioctl(fd, TIOCSETP, &sb);
- cour_nap();
- for ( ; n-- ; cp++) {
- write(fd, cp, 1);
- ioctl(fd, TIOCGETP, &sb);
- ioctl(fd, TIOCSETP, &sb);
- cour_nap();
- }
- }
-
- #ifdef DEBUG
- verbose_read()
- {
- int n = 0;
- char buf[BUFSIZ];
-
- if (ioctl(FD, FIONREAD, &n) < 0)
- return;
- if (n <= 0)
- return;
- if (read(FD, buf, n) != n)
- return;
- write(1, buf, n);
- }
- #endif
-
- #include <sys/time.h>
-
- cour_nap()
- {
- struct timeval tv;
-
- tv.tv_sec = 0;
- tv.tv_usec = 50000; /* 50 msec */
- select(0, NULL, NULL, NULL, &tv);
- }
-