4.3BSD/usr/src/usr.bin/tip/aculib/courier.c
/*
* 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 <stdio.h>
#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 <sys/time.h>
#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;
}