/*
 * 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.
 */

#include "tip.h"

#define DISCONNECT_CMD  "\20\04"        /* disconnection string */

static void     sigALRM(void);
static int      cmd(char *);
static int      detect(char *);

static  int timeout = 0;
static  sigjmp_buf timeoutbuf;

void    biz22_disconnect(void);

/*
 * Dial up on a BIZCOMP Model 1022 with either
 *      tone dialing (mod = "V")
 *      pulse dialing (mod = "W")
 */
static int
biz_dialer(char *num, char *mod)
{
        int connected = 0;
        char cbuf[40];

        if (boolean(value(VERBOSE)))
                (void) printf("\nstarting call...");
        /*
         * Disable auto-answer and configure for tone/pulse
         *  dialing
         */
        if (cmd("\02K\r")) {
                (void) printf("can't initialize bizcomp...");
                return (0);
        }
        (void) strcpy(cbuf, "\02.\r");
        cbuf[1] = *mod;
        if (cmd(cbuf)) {
                (void) printf("can't set dialing mode...");
                return (0);
        }
        (void) strcpy(cbuf, "\02D");
        (void) strlcat(cbuf, num, sizeof (cbuf));
        (void) strlcat(cbuf, "\r", sizeof (cbuf));
        (void) write(FD, cbuf, strlen(cbuf));
        if (!detect("7\r")) {
                (void) printf("can't get dial tone...");
                return (0);
        }
        if (boolean(value(VERBOSE)))
                (void) printf("ringing...");
        /*
         * The reply from the BIZCOMP should be:
         *      2 \r or 7 \r    failure
         *      1 \r            success
         */
        connected = detect("1\r");
#ifdef ACULOG
        if (timeout) {
                char line[80];

                (void) sprintf(line, "%d second dial timeout",
                    number(value(DIALTIMEOUT)));
                logent(value(HOST), num, "biz1022", line);
        }
#endif
        if (timeout)
                biz22_disconnect();     /* insurance */
        return (connected);
}

/* ARGSUSED */
int
biz22w_dialer(char *num, char *acu)
{

        return (biz_dialer(num, "W"));
}

/* ARGSUSED */
int
biz22f_dialer(char *num, char *acu)
{

        return (biz_dialer(num, "V"));
}

void
biz22_disconnect(void)
{

        (void) write(FD, DISCONNECT_CMD, 4);
        (void) sleep(2);
        (void) ioctl(FD, TCFLSH, TCOFLUSH);
}

void
biz22_abort(void)
{

        (void) write(FD, "\02", 1);
}

static void
sigALRM(void)
{

        timeout = 1;
        siglongjmp(timeoutbuf, 1);
}

static int
cmd(char *s)
{
        char c;
        sig_handler_t f;

        (void) write(FD, s, strlen(s));
        f = signal(SIGALRM, (sig_handler_t)sigALRM);
        if (sigsetjmp(timeoutbuf, 1)) {
                biz22_abort();
                (void) signal(SIGALRM, f);
                return (1);
        }
        (void) alarm(number(value(DIALTIMEOUT)));
        (void) read(FD, &c, 1);
        (void) alarm(0);
        (void) signal(SIGALRM, f);
        c &= 0177;
        return (c != '\r');
}

static int
detect(char *s)
{
        char c;
        sig_handler_t f;

        f = signal(SIGALRM, (sig_handler_t)sigALRM);
        timeout = 0;
        while (*s) {
                if (sigsetjmp(timeoutbuf, 1)) {
                        biz22_abort();
                        break;
                }
                (void) alarm(number(value(DIALTIMEOUT)));
                (void) read(FD, &c, 1);
                (void) alarm(0);
                c &= 0177;
                if (c != *s++)
                        return (0);
        }
        (void) signal(SIGALRM, f);
        return (timeout == 0);
}