/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Bill Jolitz.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)con.c	5.1 (Berkeley) 05/16/89";
#endif /* not lint */

#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <stdio.h>

char string[80] ; char *seq(), *find(), *passuntil() ;
fd_set fdset;
struct timeval tv_10th = { 0, 100000 } ; /* 1/10th of a second */
# define TIMEOUT	600	/* 10ths of a second */
main (argc, argv) char *argv[]; {
	int n,m,r,rv; char *cp ;

fprintf(stderr,"%s\n", argv[1]) ;
	FD_ZERO(&fdset) ;
	/* flush out any line noise */
	seq ("\r", 0) ;
	sleep (1) ;
	ioctl (0, TIOCFLUSH, &n) ;

	if (strcmp (argv[1], "drop") == 0) {
		(void) select(0,0,0,0,&tv_10th);
		seq("+", 5) ;
		(void) select(0,0,0,0,&tv_10th);
		seq("+", 5) ;
		(void) select(0,0,0,0,&tv_10th);
		seq("+", 5) ;
		ioctl (0, TIOCFLUSH, &n) ;
		(void) select(0,0,0,0,&tv_10th);
		if(!find("\r\nOK\r\n", 30)) ;
		ioctl (0, TIOCFLUSH, &n) ;
		seq("ATH0\r", 5) ;
		/*if(!find("\r\nOK\r\n", 10)) ;*/
		cp = passuntil("\n",TIMEOUT);
		fprintf(stderr, "|%s| ", cp) ;
		cp = passuntil("\n",TIMEOUT);
		fprintf(stderr, "|%s| ", cp) ;
		if (strncmp(cp, "OK", 2) == 0) rv = 0;
		else	rv = 1;
	} else {
	system ("stty raw -echo 1200") ;
		if ((seq ("ATDT", 10) == 0)
		&& (seq (argv[1], 30) == 0) && (seq ("\r", 10) == 0) ) ;
		else write(2,"Cannot sync with hayes\n", 23) ;
		/*if(!find("\r\nCONNECT", TIMEOUT))
			passuntil("\r\n",20);*/
		cp = passuntil("\n",TIMEOUT);
		fprintf(stderr, "|%s| ", cp) ;
		cp = passuntil("\n",TIMEOUT);
		fprintf(stderr, "|%s| ", cp) ;
		if (strncmp(cp, "CONNECT", 7) == 0) rv = 0;
		else	rv = 1;
fprintf(stderr,"rv = %d\n", rv) ;
	}
	write (2, "\r\n", 2) ;
	return (rv) ;
}

char *seq (s,t) char *s; {
	char c; int n;

	do {
		write (1, s, 1) ;
		n = 0 ;
	loop:
		FD_SET(0,&fdset) ;
		if (select(1,&fdset,0,0,&tv_10th) > 0) {
			n = read (0, &c, 1) ;
			write (2, &c, 1) ;
		}
		else if (!t)  return ((char *) -1) ;
		else  { t-- ; write (2, "*", 1); goto loop ; }
		if (n != 1 || c != *s) return (s) ;
	}	while (*++s != '\0') ;
	return ( (char *) 0) ;
}

char buf2[80];
char *find (s, n) char *s; {
	int m,r; char *sp = buf2;

	m = n ;
	while (m > 0) {
		FD_SET(0,&fdset) ;
		if ((r=select(1,&fdset,0,0,&tv_10th)) > 0) {
			ioctl (0, FIONREAD, &n) ;
			read (0, sp, n) ;
			write (2, sp, n) ;
			sp += n;
		} else	m-- ;
		if (strcmp(s, buf2) == 0) return ( (char *) 0) ;
	}
	return ( (char *) -1) ;
}

char *passuntil (s, n) char *s; {
	int m,r; char *sp = buf2;

	m = n ;
	while (m > 0) {
		FD_SET(0,&fdset) ;
		if ((r=select(1,&fdset,0,0,&tv_10th)) > 0) {
			ioctl (0, FIONREAD, &n) ;
			n = read (0, sp, n) ;
			write (2, sp, n) ;
			sp += n; *sp = '\0' ;
			do if(index(s,sp[-n])) return (buf2) ; while (--n) ;
		} else	m-- ;
	}
	return ( (char *) -1) ;
}