/*      $OpenBSD: df.c,v 1.9 2006/03/17 19:17:13 moritz Exp $   */
/*      $NetBSD: df.c,v 1.4 1995/10/29 00:49:51 pk Exp $        */

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1983, 1993
 *      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. 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.
 */

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

#include "tip.h"

static jmp_buf Sjbuf;

static int      df_dialer(char *, char *, int);
static void     alrm_timeout(int);

int
df02_dialer(char *num, char *acu)
{
        return (df_dialer(num, acu, 0));
}

int
df03_dialer(char *num, char *acu)
{
        return (df_dialer(num, acu, 1));
}

static int
df_dialer(char *num, char *acu, int df03)
{
        int f = FD;
        struct termios cntrl;
        int speed = 0;
        char c = '\0';

        tcgetattr(f, &cntrl);
        cntrl.c_cflag |= HUPCL;
        tcsetattr(f, TCSANOW, &cntrl);
        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 */

                tcgetattr(f, &cntrl);
                speed = cfgetospeed(&cntrl);
                if (speed != B1200) {   /* must dial at 1200 baud */
                        cfsetospeed(&cntrl, B1200);
                        cfsetispeed(&cntrl, B1200);
                        tcsetattr(f, TCSAFLUSH, &cntrl);
                        ioctl(f, TIOCMBIC, &st); /* clear ST for 300 baud */
                } else
                        ioctl(f, TIOCMBIS, &st); /* set ST for 1200 baud */
        }
#endif
        signal(SIGALRM, alrm_timeout);
        alarm(5 * strlen(num) + 10);
        tcflush(f, TCIOFLUSH);
        write(f, "\001", 1);
        sleep(1);
        write(f, "\002", 1);
        write(f, num, strlen(num));
        read(f, &c, 1);
#ifdef TIOCMSET
        if (df03 && speed != B1200) {
                cfsetospeed(&cntrl, speed);
                cfsetispeed(&cntrl, speed);
                tcsetattr(f, TCSAFLUSH, &cntrl);
        }
#endif
        return (c == 'A');
}

void
df_disconnect(void)
{
        write(FD, "\001", 1);
        sleep(1);
        tcflush(FD, TCIOFLUSH);
}

void
df_abort(void)
{
        df_disconnect();
}

/*ARGSUSED*/
static void
alrm_timeout(int signo)
{
        longjmp(Sjbuf, 1);
}