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hayes.c revision 1.12
      1  1.12  perry /*	$NetBSD: hayes.c,v 1.12 2006/04/03 02:25:27 perry Exp $	*/
      2   1.3    jtc 
      3   1.1    cgd /*
      4   1.3    jtc  * Copyright (c) 1983, 1993
      5   1.3    jtc  *	The Regents of the University of California.  All rights reserved.
      6   1.1    cgd  *
      7   1.1    cgd  * Redistribution and use in source and binary forms, with or without
      8   1.1    cgd  * modification, are permitted provided that the following conditions
      9   1.1    cgd  * are met:
     10   1.1    cgd  * 1. Redistributions of source code must retain the above copyright
     11   1.1    cgd  *    notice, this list of conditions and the following disclaimer.
     12   1.1    cgd  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1    cgd  *    notice, this list of conditions and the following disclaimer in the
     14   1.1    cgd  *    documentation and/or other materials provided with the distribution.
     15   1.9    agc  * 3. Neither the name of the University nor the names of its contributors
     16   1.1    cgd  *    may be used to endorse or promote products derived from this software
     17   1.1    cgd  *    without specific prior written permission.
     18   1.1    cgd  *
     19   1.1    cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20   1.1    cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21   1.1    cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22   1.1    cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23   1.1    cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24   1.1    cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25   1.1    cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26   1.1    cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27   1.1    cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28   1.1    cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29   1.1    cgd  * SUCH DAMAGE.
     30   1.1    cgd  */
     31   1.1    cgd 
     32   1.7  lukem #include <sys/cdefs.h>
     33   1.1    cgd #ifndef lint
     34   1.3    jtc #if 0
     35   1.3    jtc static char sccsid[] = "@(#)hayes.c	8.1 (Berkeley) 6/6/93";
     36   1.3    jtc #endif
     37  1.12  perry __RCSID("$NetBSD: hayes.c,v 1.12 2006/04/03 02:25:27 perry Exp $");
     38   1.1    cgd #endif /* not lint */
     39   1.1    cgd 
     40   1.1    cgd /*
     41   1.1    cgd  * Routines for calling up on a Hayes Modem
     42   1.1    cgd  * (based on the old VenTel driver).
     43   1.1    cgd  * The modem is expected to be strapped for "echo".
     44   1.1    cgd  * Also, the switches enabling the DTR and CD lines
     45   1.1    cgd  * must be set correctly.
     46   1.1    cgd  * NOTICE:
     47   1.1    cgd  * The easy way to hang up a modem is always simply to
     48   1.1    cgd  * clear the DTR signal. However, if the +++ sequence
     49   1.1    cgd  * (which switches the modem back to local mode) is sent
     50   1.1    cgd  * before modem is hung up, removal of the DTR signal
     51   1.1    cgd  * has no effect (except that it prevents the modem from
     52   1.1    cgd  * recognizing commands).
     53  1.11  perry  * (by Helge Skrivervik, Calma Company, Sunnyvale, CA. 1984)
     54   1.1    cgd  */
     55   1.1    cgd /*
     56   1.1    cgd  * TODO:
     57   1.1    cgd  * It is probably not a good idea to switch the modem
     58   1.1    cgd  * state between 'verbose' and terse (status messages).
     59  1.11  perry  * This should be kicked out and we should use verbose
     60   1.1    cgd  * mode only. This would make it consistent with normal
     61   1.1    cgd  * interactive use thru the command 'tip dialer'.
     62   1.1    cgd  */
     63   1.1    cgd #include "tip.h"
     64   1.1    cgd 
     65   1.1    cgd #define	min(a,b)	((a < b) ? a : b)
     66   1.1    cgd 
     67   1.1    cgd static	int timeout = 0;
     68   1.1    cgd static	jmp_buf timeoutbuf;
     69   1.1    cgd #define DUMBUFLEN	40
     70   1.1    cgd static char dumbuf[DUMBUFLEN];
     71   1.1    cgd 
     72   1.1    cgd #define	DIALING		1
     73   1.1    cgd #define IDLE		2
     74   1.1    cgd #define CONNECTED	3
     75   1.1    cgd #define	FAILED		4
     76   1.1    cgd static	int state = IDLE;
     77   1.1    cgd 
     78  1.11  perry static	void	error_rep(char);
     79  1.11  perry static	char	gobble(const char *);
     80  1.11  perry static	void	goodbye(void);
     81  1.11  perry static	int	hay_sync(void);
     82  1.11  perry static	void	sigALRM(int);
     83   1.7  lukem 
     84   1.7  lukem int
     85  1.11  perry hay_dialer(char *num, char *acu)
     86   1.1    cgd {
     87   1.7  lukem 	char *cp;
     88   1.7  lukem 	int connected = 0;
     89   1.1    cgd 	char dummy;
     90   1.4     pk 	struct termios cntrl;
     91  1.12  perry 
     92   1.1    cgd 	if (hay_sync() == 0)		/* make sure we can talk to the modem */
     93   1.1    cgd 		return(0);
     94   1.1    cgd 	if (boolean(value(VERBOSE)))
     95   1.1    cgd 		printf("\ndialing...");
     96   1.1    cgd 	fflush(stdout);
     97   1.4     pk 	tcgetattr(FD, &cntrl);
     98   1.4     pk 	cntrl.c_cflag |= HUPCL;
     99   1.4     pk 	tcsetattr(FD, TCSANOW, &cntrl);
    100   1.4     pk 	tcflush(FD, TCIOFLUSH);
    101   1.1    cgd 	write(FD, "ATv0\r", 5);	/* tell modem to use short status codes */
    102   1.1    cgd 	gobble("\r");
    103   1.1    cgd 	gobble("\r");
    104   1.1    cgd 	write(FD, "ATTD", 4);	/* send dial command */
    105   1.5    cgd 	for (cp = num; *cp; cp++)
    106   1.5    cgd 		if (*cp == '=')
    107   1.5    cgd 			*cp = ',';
    108   1.1    cgd 	write(FD, num, strlen(num));
    109   1.1    cgd 	state = DIALING;
    110   1.1    cgd 	write(FD, "\r", 1);
    111   1.1    cgd 	connected = 0;
    112   1.1    cgd 	if (gobble("\r")) {
    113   1.1    cgd 		if ((dummy = gobble("01234")) != '1')
    114   1.1    cgd 			error_rep(dummy);
    115   1.1    cgd 		else
    116   1.1    cgd 			connected = 1;
    117   1.1    cgd 	}
    118   1.1    cgd 	if (connected)
    119   1.1    cgd 		state = CONNECTED;
    120   1.1    cgd 	else {
    121   1.1    cgd 		state = FAILED;
    122   1.1    cgd 		return (connected);	/* lets get out of here.. */
    123   1.1    cgd 	}
    124   1.4     pk 	tcflush(FD, TCIOFLUSH);
    125   1.1    cgd 	if (timeout)
    126   1.1    cgd 		hay_disconnect();	/* insurance */
    127   1.1    cgd 	return (connected);
    128   1.1    cgd }
    129   1.1    cgd 
    130   1.1    cgd 
    131   1.7  lukem void
    132  1.11  perry hay_disconnect(void)
    133   1.1    cgd {
    134   1.1    cgd 
    135   1.1    cgd 	/* first hang up the modem*/
    136   1.1    cgd #ifdef DEBUG
    137   1.1    cgd 	printf("\rdisconnecting modem....\n\r");
    138   1.1    cgd #endif
    139   1.1    cgd 	ioctl(FD, TIOCCDTR, 0);
    140   1.1    cgd 	sleep(1);
    141   1.1    cgd 	ioctl(FD, TIOCSDTR, 0);
    142   1.1    cgd 	goodbye();
    143   1.1    cgd }
    144   1.1    cgd 
    145   1.7  lukem void
    146  1.11  perry hay_abort(void)
    147   1.1    cgd {
    148   1.1    cgd 
    149   1.1    cgd 	write(FD, "\r", 1);	/* send anything to abort the call */
    150   1.1    cgd 	hay_disconnect();
    151   1.1    cgd }
    152   1.1    cgd 
    153   1.1    cgd static void
    154  1.11  perry sigALRM(int dummy)
    155   1.1    cgd {
    156   1.1    cgd 
    157   1.1    cgd 	printf("\07timeout waiting for reply\n\r");
    158   1.1    cgd 	timeout = 1;
    159   1.1    cgd 	longjmp(timeoutbuf, 1);
    160   1.1    cgd }
    161   1.1    cgd 
    162   1.1    cgd static char
    163  1.11  perry gobble(const char *match)
    164   1.1    cgd {
    165   1.1    cgd 	char c;
    166   1.1    cgd 	sig_t f;
    167   1.1    cgd 	int i, status = 0;
    168   1.1    cgd 
    169   1.7  lukem #if __GNUC__	/* XXX pacify gcc */
    170   1.7  lukem 	(void)&status;
    171   1.7  lukem #endif
    172   1.7  lukem 
    173   1.1    cgd 	f = signal(SIGALRM, sigALRM);
    174   1.1    cgd 	timeout = 0;
    175   1.1    cgd #ifdef DEBUG
    176   1.1    cgd 	printf("\ngobble: waiting for %s\n", match);
    177   1.1    cgd #endif
    178   1.1    cgd 	do {
    179   1.1    cgd 		if (setjmp(timeoutbuf)) {
    180   1.1    cgd 			signal(SIGALRM, f);
    181   1.1    cgd 			return (0);
    182   1.1    cgd 		}
    183   1.1    cgd 		alarm(number(value(DIALTIMEOUT)));
    184   1.1    cgd 		read(FD, &c, 1);
    185   1.1    cgd 		alarm(0);
    186   1.1    cgd 		c &= 0177;
    187   1.1    cgd #ifdef DEBUG
    188   1.1    cgd 		printf("%c 0x%x ", c, c);
    189   1.1    cgd #endif
    190   1.1    cgd 		for (i = 0; i < strlen(match); i++)
    191   1.1    cgd 			if (c == match[i])
    192   1.1    cgd 				status = c;
    193   1.1    cgd 	} while (status == 0);
    194   1.1    cgd 	signal(SIGALRM, SIG_DFL);
    195   1.1    cgd #ifdef DEBUG
    196   1.1    cgd 	printf("\n");
    197   1.1    cgd #endif
    198   1.1    cgd 	return (status);
    199   1.1    cgd }
    200   1.1    cgd 
    201   1.7  lukem static void
    202  1.11  perry error_rep(char c)
    203   1.1    cgd {
    204   1.8    mrg 
    205   1.1    cgd 	printf("\n\r");
    206   1.1    cgd 	switch (c) {
    207   1.1    cgd 
    208   1.1    cgd 	case '0':
    209   1.1    cgd 		printf("OK");
    210   1.1    cgd 		break;
    211   1.1    cgd 
    212   1.1    cgd 	case '1':
    213   1.1    cgd 		printf("CONNECT");
    214   1.1    cgd 		break;
    215  1.11  perry 
    216   1.1    cgd 	case '2':
    217   1.1    cgd 		printf("RING");
    218   1.1    cgd 		break;
    219  1.11  perry 
    220   1.1    cgd 	case '3':
    221   1.1    cgd 		printf("NO CARRIER");
    222   1.1    cgd 		break;
    223  1.11  perry 
    224   1.1    cgd 	case '4':
    225   1.1    cgd 		printf("ERROR in input");
    226   1.1    cgd 		break;
    227  1.11  perry 
    228   1.1    cgd 	case '5':
    229   1.1    cgd 		printf("CONNECT 1200");
    230   1.1    cgd 		break;
    231  1.11  perry 
    232   1.1    cgd 	default:
    233   1.1    cgd 		printf("Unknown Modem error: %c (0x%x)", c, c);
    234   1.1    cgd 	}
    235   1.1    cgd 	printf("\n\r");
    236   1.1    cgd 	return;
    237   1.1    cgd }
    238   1.1    cgd 
    239   1.1    cgd /*
    240   1.1    cgd  * set modem back to normal verbose status codes.
    241   1.1    cgd  */
    242   1.7  lukem void
    243  1.11  perry goodbye(void)
    244   1.1    cgd {
    245   1.7  lukem 	int len;
    246   1.1    cgd 	char c;
    247   1.1    cgd 
    248   1.4     pk 	tcflush(FD, TCIOFLUSH);
    249   1.1    cgd 	if (hay_sync()) {
    250   1.1    cgd 		sleep(1);
    251   1.1    cgd #ifndef DEBUG
    252   1.4     pk 		tcflush(FD, TCIOFLUSH);
    253   1.1    cgd #endif
    254   1.1    cgd 		write(FD, "ATH0\r", 5);		/* insurance */
    255   1.1    cgd #ifndef DEBUG
    256   1.1    cgd 		c = gobble("03");
    257   1.1    cgd 		if (c != '0' && c != '3') {
    258   1.1    cgd 			printf("cannot hang up modem\n\r");
    259   1.1    cgd 			printf("please use 'tip dialer' to make sure the line is hung up\n\r");
    260   1.1    cgd 		}
    261   1.1    cgd #endif
    262   1.1    cgd 		sleep(1);
    263   1.1    cgd 		ioctl(FD, FIONREAD, &len);
    264   1.1    cgd #ifdef DEBUG
    265   1.1    cgd 		printf("goodbye1: len=%d -- ", len);
    266   1.1    cgd 		rlen = read(FD, dumbuf, min(len, DUMBUFLEN));
    267   1.1    cgd 		dumbuf[rlen] = '\0';
    268   1.1    cgd 		printf("read (%d): %s\r\n", rlen, dumbuf);
    269   1.1    cgd #endif
    270   1.1    cgd 		write(FD, "ATv1\r", 5);
    271   1.1    cgd 		sleep(1);
    272   1.1    cgd #ifdef DEBUG
    273   1.1    cgd 		ioctl(FD, FIONREAD, &len);
    274   1.1    cgd 		printf("goodbye2: len=%d -- ", len);
    275   1.1    cgd 		rlen = read(FD, dumbuf, min(len, DUMBUFLEN));
    276   1.1    cgd 		dumbuf[rlen] = '\0';
    277   1.1    cgd 		printf("read (%d): %s\r\n", rlen, dumbuf);
    278   1.1    cgd #endif
    279   1.1    cgd 	}
    280   1.4     pk 	tcflush(FD, TCIOFLUSH);
    281   1.1    cgd 	ioctl(FD, TIOCCDTR, 0);		/* clear DTR (insurance) */
    282   1.1    cgd 	close(FD);
    283   1.1    cgd }
    284   1.1    cgd 
    285   1.1    cgd #define MAXRETRY	5
    286   1.1    cgd 
    287   1.7  lukem int
    288  1.11  perry hay_sync(void)
    289   1.1    cgd {
    290   1.1    cgd 	int len, retry = 0;
    291   1.1    cgd 
    292   1.1    cgd 	while (retry++ <= MAXRETRY) {
    293   1.1    cgd 		write(FD, "AT\r", 3);
    294   1.1    cgd 		sleep(1);
    295   1.1    cgd 		ioctl(FD, FIONREAD, &len);
    296   1.1    cgd 		if (len) {
    297   1.1    cgd 			len = read(FD, dumbuf, min(len, DUMBUFLEN));
    298  1.11  perry 			if (strchr(dumbuf, '0') ||
    299   1.7  lukem 		   	(strchr(dumbuf, 'O') && strchr(dumbuf, 'K')))
    300   1.1    cgd 				return(1);
    301   1.1    cgd #ifdef DEBUG
    302   1.1    cgd 			dumbuf[len] = '\0';
    303   1.1    cgd 			printf("hay_sync: (\"%s\") %d\n\r", dumbuf, retry);
    304   1.1    cgd #endif
    305   1.1    cgd 		}
    306   1.1    cgd 		ioctl(FD, TIOCCDTR, 0);
    307   1.1    cgd 		ioctl(FD, TIOCSDTR, 0);
    308   1.1    cgd 	}
    309   1.1    cgd 	printf("Cannot synchronize with hayes...\n\r");
    310   1.1    cgd 	return(0);
    311   1.1    cgd }
    312