tip/aculib/v3451.c

/*
 * Copyright 2000 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * Routines for calling up on a Vadic 3451 Modem
 */
#include "tip.h"

static int  expect(char *);
static int  notin(char *, char *);
static int  prefix(char *, char *);
static void vawrite(char *, int);
static void alarmtr(void);

static sigjmp_buf   Sjbuf;

/* ARGSUSED */
int
v3451_dialer(char *num, char *acu)
{
    int ok;
    sig_handler_t   func;
    struct termios buf;
    int slow = number(value(BAUDRATE)) < 1200;
    char phone[50];
#ifdef ACULOG
    char line[80];
#endif

    /*
     * Get in synch
     */
    vawrite("I\r", 1 + slow);
    vawrite("I\r", 1 + slow);
    vawrite("I\r", 1 + slow);
    vawrite("\005\r", 2 + slow);
    if (!expect("READY")) {
        (void) printf("can't synchronize with vadic 3451\n");
#ifdef ACULOG
        logent(value(HOST), num, "vadic", "can't synch up");
#endif
        return (0);
    }
    (void) ioctl(FD, TCGETS, &buf);
    buf.c_cflag |= HUPCL;
    (void) ioctl(FD, TCSETSF, &buf);
    (void) sleep(1);
    vawrite("D\r", 2 + slow);
    if (!expect("NUMBER?")) {
        (void) printf("Vadic will not accept dial command\n");
#ifdef ACULOG
        logent(value(HOST), num, "vadic", "will not accept dial");
#endif
        return (0);
    }
    (void) strlcpy(phone, num, sizeof (phone));
    (void) strlcat(phone, "\r", sizeof (phone));
    vawrite(phone, 1 + slow);
    if (!expect(phone)) {
        (void) printf("Vadic will not accept phone number\n");
#ifdef ACULOG
        logent(value(HOST), num, "vadic", "will not accept number");
#endif
        return (0);
    }
    func = signal(SIGINT, SIG_IGN);
    /*
     * You cannot interrupt the Vadic when its dialing;
     * even dropping DTR does not work (definitely a
     * brain damaged design).
     */
    vawrite("\r", 1 + slow);
    vawrite("\r", 1 + slow);
    if (!expect("DIALING:")) {
        (void) printf("Vadic failed to dial\n");
#ifdef ACULOG
        logent(value(HOST), num, "vadic", "failed to dial");
#endif
        return (0);
    }
    if (boolean(value(VERBOSE)))
        (void) printf("\ndialing...");
    ok = expect("ON LINE");
    (void) signal(SIGINT, func);
    if (!ok) {
        (void) printf("call failed\n");
#ifdef ACULOG
        logent(value(HOST), num, "vadic", "call failed");
#endif
        return (0);
    }
    (void) ioctl(FD, TCFLSH, TCOFLUSH);
    return (1);
}

void
v3451_disconnect(void)
{

    (void) close(FD);
}

void
v3451_abort(void)
{

    (void) close(FD);
}

static void
vawrite(char *cp, int delay)
{

    for (; *cp; (void) sleep(delay), cp++)
        (void) write(FD, cp, 1);
}

static int
expect(char *cp)
{
    char buf[300];
    char *rp = buf;
    int timeout = 30, online = 0;

    if (strcmp(cp, "\"\"") == 0)
        return (1);
    *rp = 0;
    /*
     * If we are waiting for the Vadic to complete
     * dialing and get a connection, allow more time
     * Unfortunately, the Vadic times out 24 seconds after
     * the last digit is dialed
     */
    online = strcmp(cp, "ON LINE") == 0;
    if (online)
        timeout = number(value(DIALTIMEOUT));
    (void) signal(SIGALRM, (sig_handler_t)alarmtr);
    if (sigsetjmp(Sjbuf, 1))
        return (0);
    (void) alarm(timeout);
    while (notin(cp, buf) && rp < buf + sizeof (buf) - 1) {
        if (online && notin("FAILED CALL", buf) == 0)
            return (0);
        if (read(FD, rp, 1) < 0) {
            (void) alarm(0);
            return (0);
        }
        if (*rp &= 0177)
            rp++;
        *rp = '\0';
    }
    (void) alarm(0);
    return (1);
}

static void
alarmtr(void)
{

    siglongjmp(Sjbuf, 1);
}

static int
notin(char *sh, char *lg)
{

    for (; *lg; lg++)
        if (prefix(sh, lg))
            return (0);
    return (1);
}

static int
prefix(char *s1, char *s2)
{
    char c;

    while ((c = *s1++) == *s2++)
        if (c == '\0')
            return (1);
    return (c == '\0');
}