usr.bin/tip/aculib/df.c

/*
 * Copyright (c) 1983 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)df.c        5.4 (Berkeley) 3/2/91";
#endif /* not lint */

/*
 * Dial the DF02-AC or DF03-AC
 */

#include "tip.h"

static jmp_buf Sjbuf;
static void timeout();

df02_dialer(num, acu)
        char *num, *acu;
{

        return (df_dialer(num, acu, 0));
}

df03_dialer(num, acu)
        char *num, *acu;
{

        return (df_dialer(num, acu, 1));
}

df_dialer(num, acu, df03)
        char *num, *acu;
        int df03;
{
        register int f = FD;
        struct sgttyb buf;
        int speed = 0, rw = 2;
        char c = '\0';

        ioctl(f, TIOCHPCL, 0);          /* make sure it hangs up when done */
        if (setjmp(Sjbuf)) {
                printf("connection timed out\r\n");
                df_disconnect();
                return (0);
        }
        if (boolean(value(VERBOSE)))
                printf("\ndialing...");
        fflush(stdout);
#ifdef TIOCMSET
        if (df03) {
                int st = TIOCM_ST;      /* secondary Transmit flag */

                ioctl(f, TIOCGETP, &buf);
                if (buf.sg_ospeed != B1200) {   /* must dial at 1200 baud */
                        speed = buf.sg_ospeed;
                        buf.sg_ospeed = buf.sg_ispeed = B1200;
                        ioctl(f, TIOCSETP, &buf);
                        ioctl(f, TIOCMBIC, &st); /* clear ST for 300 baud */
                } else
                        ioctl(f, TIOCMBIS, &st); /* set ST for 1200 baud */
        }
#endif
        signal(SIGALRM, timeout);
        alarm(5 * strlen(num) + 10);
        ioctl(f, TIOCFLUSH, &rw);
        write(f, "\001", 1);
        sleep(1);
        write(f, "\002", 1);
        write(f, num, strlen(num));
        read(f, &c, 1);
#ifdef TIOCMSET
        if (df03 && speed) {
                buf.sg_ispeed = buf.sg_ospeed = speed;
                ioctl(f, TIOCSETP, &buf);
        }
#endif
        return (c == 'A');
}

df_disconnect()
{
        int rw = 2;

        write(FD, "\001", 1);
        sleep(1);
        ioctl(FD, TIOCFLUSH, &rw);
}


df_abort()
{

        df_disconnect();
}


static void
timeout()
{

        longjmp(Sjbuf, 1);
}