/*
 * 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.
 */

/*
 * 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');
}