/* * Copyright (c) 1986 Regents of the University of California. * All rights reserved. The Berkeley software License Agreement * specifies the terms and conditions for redistribution. */ #ifndef lint static char sccsid[] = "@(#)courier.c 5.1 (Berkeley) 4/3/86"; #endif #define write cour_write /* * Routines for calling up on a Hayes Smartmodem */ #include "tip.h" #include #define MAXRETRY 5 static int sigALRM(); static int timeout = 0; static jmp_buf timeoutbuf, intbuf; static int (*osigint)(); cour_dialer(num, acu) register char *num; char *acu; { register char *cp; register int connected = 0; #ifdef ACULOG char line[80]; #endif if (boolean(value(VERBOSE))) printf("Using \"%s\"\n", acu); ioctl(FD, TIOCHPCL, 0); /* * Get in synch. */ if (!coursync()) { printf("can't synchronize with courier\n"); #ifdef ACULOG logent(value(HOST), num, "courier", "can't synch up"); #endif return (0); } 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() { close(FD); } cour_abort() { write(FD, "\rAT Z\r", 6); close(FD); } static int sigALRM() { printf("\07timeout waiting for reply\n"); timeout = 1; longjmp(timeoutbuf, 1); } static int cour_swallow(match) register char *match; { char c; int (*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; if (boolean(value(VERBOSE))) putchar(c); } while (c == *match++); if (boolean(value(VERBOSE))) fflush(stdout); 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; int (*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) { printf("%s\r\n", dialer_buf); 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); if (boolean(value(VERBOSE))) printf("%s\r\n", dialer_buf); 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. If you don't have FIONREAD * there are gory ways to simulate this. */ static int coursync() { int already = 0; /* * Toggle DTR to force anyone off that might have left * the modem connected, and insure a consistent state * to start from. * * If you don't have the ioctl calls to diddle directly * with DTR, you can always try setting the baud rate to 0. */ ioctl(FD, TIOCCDTR, 0); sleep(2); ioctl(FD, TIOCSDTR, 0); while (already++ < MAXRETRY) { ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ write(FD, "\rAT Z\r", 6); /* reset modem */ sleep(2); verbose_read(); write(FD, "AT E0\r", 6); /* turn off echoing */ sleep(2); verbose_read(); ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ sleep(1); write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21); if (cour_swallow("\r\nOK\r\n")) { ioctl(FD, TIOCFLUSH, 0); return 1; } sleep(2); write(FD, "+++", 3); sleep(2); } write(FD, "\rAT Z\r", 6); return 0; } #undef write cour_write(fd, cp, n) int fd; char *cp; int n; { struct sgttyb sb; if (boolean(value(VERBOSE))) write(1, cp, n); 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(); } } verbose_read() { int n = 0; char buf[BUFSIZ]; if (!boolean(value(VERBOSE))) return; if (ioctl(FD, FIONREAD, &n) < 0) return; if (n <= 0) return; if (read(FD, buf, n) != n) return; write(1, buf, n); } /* * Code stolen from /usr/src/lib/libc/gen/sleep.c */ #include #define mask(s) (1<<((s)-1)) #define setvec(vec, a) \ vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 static napms = 50; /* Give the courier 50 milliseconds between characters */ static int ringring; cour_nap() { static int cour_napx(); int omask; struct itimerval itv, oitv; register struct itimerval *itp = &itv; struct sigvec vec, ovec; timerclear(&itp->it_interval); timerclear(&itp->it_value); if (setitimer(ITIMER_REAL, itp, &oitv) < 0) return; setvec(ovec, SIG_DFL); omask = sigblock(mask(SIGALRM)); itp->it_value.tv_sec = napms/1000; itp->it_value.tv_usec = ((napms%1000)*1000); setvec(vec, cour_napx); ringring = 0; (void) sigvec(SIGALRM, &vec, &ovec); (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); while (!ringring) sigpause(omask &~ mask(SIGALRM)); (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); (void) sigsetmask(omask); } static cour_napx() { ringring = 1; }