[unix-history] / usr / src / usr.bin / tip / aculib / courier.c

/*
 * Copyright (c) 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)courier.c	5.3 (Berkeley) %G%";
#endif /* not lint */

#define write cour_write
/*
 * Routines for calling up on a Courier modem.
 * Derived from Hayes driver.
 */
#include "tip.h"
#include <stdio.h>

#define	MAXRETRY	5

static	int sigALRM();
static	int timeout = 0;
static	int connected = 0;
static	jmp_buf timeoutbuf, intbuf;
static	int (*osigint)();

cour_dialer(num, acu)
	register char *num;
	char *acu;
{
	register char *cp;
#ifdef ACULOG
	char line[80];
#endif
	if (boolean(value(VERBOSE)))
		printf("Using \"%s\"\n", acu);

	ioctl(FD, TIOCHPCL, 0);
	/*
	 * Get in synch.
	 */
	if (!coursync()) {
badsynch:
		printf("can't synchronize with courier\n");
#ifdef ACULOG
		logent(value(HOST), num, "courier", "can't synch up");
#endif
		return (0);
	}
	write(FD, "AT E0\r", 6);	/* turn off echoing */
	sleep(1);
#ifdef DEBUG
	if (boolean(value(VERBOSE)))
		verbose_read();
#endif
	ioctl(FD, TIOCFLUSH, 0);	/* flush any clutter */
	write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
	if (!cour_swallow("\r\nOK\r\n"))
		goto badsynch;
	fflush(stdout);
	write(FD, "AT D", 4);
	for (cp = num; *cp; cp++)
		if (*cp == '=')
			*cp = ',';
	write(FD, num, strlen(num));
	write(FD, "\r", 1);
	connected = cour_connect();
#ifdef ACULOG
	if (timeout) {
		sprintf(line, "%d second dial timeout",
			number(value(DIALTIMEOUT)));
		logent(value(HOST), num, "cour", line);
	}
#endif
	if (timeout)
		cour_disconnect();
	return (connected);
}

cour_disconnect()
{
	 /* first hang up the modem*/
	ioctl(FD, TIOCCDTR, 0);
	sleep(1);
	ioctl(FD, TIOCSDTR, 0);
	coursync();				/* reset */
	close(FD);
}

cour_abort()
{
	write(FD, "\r", 1);	/* send anything to abort the call */
	cour_disconnect();
}

static int
sigALRM()
{
	printf("\07timeout waiting for reply\n");
	timeout = 1;
	longjmp(timeoutbuf, 1);
}

static int
cour_swallow(match)
  register char *match;
  {
	char c;
	int (*f)();

	f = signal(SIGALRM, sigALRM);
	timeout = 0;
	do {
		if (*match =='\0') {
			signal(SIGALRM, f);
			return (1);
		}
		if (setjmp(timeoutbuf)) {
			signal(SIGALRM, f);
			return (0);
		}
		alarm(number(value(DIALTIMEOUT)));
		read(FD, &c, 1);
		alarm(0);
		c &= 0177;
#ifdef DEBUG
		if (boolean(value(VERBOSE)))
			putchar(c);
#endif
	} while (c == *match++);
#ifdef DEBUG
	if (boolean(value(VERBOSE)))
		fflush(stdout);
#endif
	signal(SIGALRM, SIG_DFL);
	return (0);
}

struct baud_msg {
	char *msg;
	int baud;
} baud_msg[] = {
	"",		B300,
	" 1200",	B1200,
	" 2400",	B2400,
	0,		0,
};

static int
cour_connect()
{
	char c;
	int nc, nl, n;
	struct sgttyb sb;
	char dialer_buf[64];
	struct baud_msg *bm;
	int (*f)();

	if (cour_swallow("\r\n") == 0)
		return (0);
	f = signal(SIGALRM, sigALRM);
again:
	nc = 0; nl = sizeof(dialer_buf)-1;
	bzero(dialer_buf, sizeof(dialer_buf));
	timeout = 0;
	for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
		if (setjmp(timeoutbuf))
			break;
		alarm(number(value(DIALTIMEOUT)));
		n = read(FD, &c, 1);
		alarm(0);
		if (n <= 0)
			break;
		c &= 0x7f;
		if (c == '\r') {
			if (cour_swallow("\n") == 0)
				break;
			if (!dialer_buf[0])
				goto again;
			if (strcmp(dialer_buf, "RINGING") == 0 &&
			    boolean(value(VERBOSE))) {
#ifdef DEBUG
				printf("%s\r\n", dialer_buf);
#endif
				goto again;
			}
			if (strncmp(dialer_buf, "CONNECT",
				    sizeof("CONNECT")-1) != 0)
				break;
			for (bm = baud_msg ; bm ; bm++)
				if (strcmp(bm->msg,
				    dialer_buf+sizeof("CONNECT")-1) == 0) {
					if (ioctl(FD, TIOCGETP, &sb) < 0) {
						perror("TIOCGETP");
						goto error;
					}
					sb.sg_ispeed = sb.sg_ospeed = bm->baud;
					if (ioctl(FD, TIOCSETP, &sb) < 0) {
						perror("TIOCSETP");
						goto error;
					}
					signal(SIGALRM, f);
#ifdef DEBUG
					if (boolean(value(VERBOSE)))
						printf("%s\r\n", dialer_buf);
#endif
					return (1);
				}
			break;
		}
		dialer_buf[nc] = c;
#ifdef notdef
		if (boolean(value(VERBOSE)))
			putchar(c);
#endif
	}
error1:
	printf("%s\r\n", dialer_buf);
error:
	signal(SIGALRM, f);
	return (0);
}

/*
 * This convoluted piece of code attempts to get
 * the courier in sync.
 */
static int
coursync()
{
	int already = 0;
	int len;
	char buf[40];

	while (already++ < MAXRETRY) {
		ioctl(FD, TIOCFLUSH, 0);	/* flush any clutter */
		write(FD, "\rAT Z\r", 6);	/* reset modem */
		bzero(buf, sizeof(buf));
		sleep(1);
		ioctl(FD, FIONREAD, &len);
		if (len) {
			len = read(FD, buf, sizeof(buf));
#ifdef DEBUG
			buf[len] = '\0';
			printf("coursync: (\"%s\")\n\r", buf);
#endif
			if (index(buf, '0') || 
		   	   (index(buf, 'O') && index(buf, 'K')))
				return(1);
		}
		/*
		 * If not strapped for DTR control,
		 * try to get command mode.
		 */
		sleep(1);
		write(FD, "+++", 3);
		sleep(1);
		/*
		 * Toggle DTR to force anyone off that might have left
		 * the modem connected.
		 */
		ioctl(FD, TIOCCDTR, 0);
		sleep(1);
		ioctl(FD, TIOCSDTR, 0);
	}
	write(FD, "\rAT Z\r", 6);
	return (0);
}

#undef write

cour_write(fd, cp, n)
int fd;
char *cp;
int n;
{
	struct sgttyb sb;
#ifdef notdef
	if (boolean(value(VERBOSE)))
		write(1, cp, n);
#endif
	ioctl(fd, TIOCGETP, &sb);
	ioctl(fd, TIOCSETP, &sb);
	cour_nap();
	for ( ; n-- ; cp++) {
		write(fd, cp, 1);
		ioctl(fd, TIOCGETP, &sb);
		ioctl(fd, TIOCSETP, &sb);
		cour_nap();
	}
}

#ifdef DEBUG
verbose_read()
{
	int n = 0;
	char buf[BUFSIZ];

	if (ioctl(FD, FIONREAD, &n) < 0)
		return;
	if (n <= 0)
		return;
	if (read(FD, buf, n) != n)
		return;
	write(1, buf, n);
}
#endif

/*
 * Code stolen from /usr/src/lib/libc/gen/sleep.c
 */
#include <sys/time.h>

#define mask(s) (1<<((s)-1))
#define setvec(vec, a) \
        vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0

static napms = 50; /* Give the courier 50 milliseconds between characters */

static int ringring;

cour_nap()
{
	
        static int cour_napx();
	int omask;
        struct itimerval itv, oitv;
        register struct itimerval *itp = &itv;
        struct sigvec vec, ovec;

        timerclear(&itp->it_interval);
        timerclear(&itp->it_value);
        if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
                return;
        setvec(ovec, SIG_DFL);
        omask = sigblock(mask(SIGALRM));
        itp->it_value.tv_sec = napms/1000;
	itp->it_value.tv_usec = ((napms%1000)*1000);
        setvec(vec, cour_napx);
        ringring = 0;
        (void) sigvec(SIGALRM, &vec, &ovec);
        (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
        while (!ringring)
                sigpause(omask &~ mask(SIGALRM));
        (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
        (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
	(void) sigsetmask(omask);
}

static
cour_napx()
{
        ringring = 1;
}
Commit	Line	Data
1485b502	1	/*
be11e13c KB	2	* Copyright (c) 1986 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
1485b502 DS	16	*/
	17
	18	#ifndef lint
be11e13c KB	19	static char sccsid[] = "@(#)courier.c 5.3 (Berkeley) %G%";
be11e13c KB	20	#endif /* not lint */
1485b502 DS	21
	22	#define write cour_write
	23	/*
fb6da896 MK	24	* Routines for calling up on a Courier modem.
fb6da896 MK	25	* Derived from Hayes driver.
1485b502 DS	26	*/
	27	#include "tip.h"
	28	#include <stdio.h>
	29
	30	#define MAXRETRY 5
	31
	32	static int sigALRM();
	33	static int timeout = 0;
fb6da896	34	static int connected = 0;
1485b502 DS	35	static jmp_buf timeoutbuf, intbuf;
	36	static int (*osigint)();
	37
	38	cour_dialer(num, acu)
	39	register char *num;
	40	char *acu;
	41	{
	42	register char *cp;
1485b502 DS	43	#ifdef ACULOG
	44	char line[80];
	45	#endif
	46	if (boolean(value(VERBOSE)))
	47	printf("Using \"%s\"\n", acu);
	48
	49	ioctl(FD, TIOCHPCL, 0);
	50	/*
	51	* Get in synch.
	52	*/
	53	if (!coursync()) {
fb6da896	54	badsynch:
1485b502 DS	55	printf("can't synchronize with courier\n");
	56	#ifdef ACULOG
	57	logent(value(HOST), num, "courier", "can't synch up");
	58	#endif
	59	return (0);
	60	}
fb6da896 MK	61	write(FD, "AT E0\r", 6); /* turn off echoing */
	62	sleep(1);
	63	#ifdef DEBUG
	64	if (boolean(value(VERBOSE)))
	65	verbose_read();
	66	#endif
	67	ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
	68	write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
	69	if (!cour_swallow("\r\nOK\r\n"))
	70	goto badsynch;
1485b502 DS	71	fflush(stdout);
	72	write(FD, "AT D", 4);
	73	for (cp = num; *cp; cp++)
	74	if (*cp == '=')
	75	*cp = ',';
	76	write(FD, num, strlen(num));
	77	write(FD, "\r", 1);
	78	connected = cour_connect();
	79	#ifdef ACULOG
	80	if (timeout) {
	81	sprintf(line, "%d second dial timeout",
	82	number(value(DIALTIMEOUT)));
	83	logent(value(HOST), num, "cour", line);
	84	}
	85	#endif
	86	if (timeout)
	87	cour_disconnect();
	88	return (connected);
	89	}
	90
	91	cour_disconnect()
fb6da896 MK	92	{
	93	/* first hang up the modem*/
	94	ioctl(FD, TIOCCDTR, 0);
	95	sleep(1);
	96	ioctl(FD, TIOCSDTR, 0);
	97	coursync(); /* reset */
1485b502 DS	98	close(FD);
	99	}
	100
	101	cour_abort()
fb6da896 MK	102	{
	103	write(FD, "\r", 1); /* send anything to abort the call */
	104	cour_disconnect();
1485b502 DS	105	}
	106
	107	static int
	108	sigALRM()
	109	{
	110	printf("\07timeout waiting for reply\n");
	111	timeout = 1;
	112	longjmp(timeoutbuf, 1);
	113	}
	114
	115	static int
	116	cour_swallow(match)
	117	register char *match;
	118	{
	119	char c;
	120	int (*f)();
	121
	122	f = signal(SIGALRM, sigALRM);
	123	timeout = 0;
	124	do {
	125	if (*match =='\0') {
	126	signal(SIGALRM, f);
fb6da896	127	return (1);
1485b502 DS	128	}
	129	if (setjmp(timeoutbuf)) {
	130	signal(SIGALRM, f);
	131	return (0);
	132	}
	133	alarm(number(value(DIALTIMEOUT)));
	134	read(FD, &c, 1);
	135	alarm(0);
	136	c &= 0177;
fb6da896	137	#ifdef DEBUG
1485b502 DS	138	if (boolean(value(VERBOSE)))
1485b502 DS	139	putchar(c);
fb6da896	140	#endif
1485b502	141	} while (c == *match++);
fb6da896	142	#ifdef DEBUG
1485b502 DS	143	if (boolean(value(VERBOSE)))
1485b502 DS	144	fflush(stdout);
fb6da896	145	#endif
1485b502 DS	146	signal(SIGALRM, SIG_DFL);
	147	return (0);
	148	}
	149
	150	struct baud_msg {
	151	char *msg;
	152	int baud;
	153	} baud_msg[] = {
	154	"", B300,
	155	" 1200", B1200,
	156	" 2400", B2400,
	157	0, 0,
	158	};
	159
	160	static int
	161	cour_connect()
	162	{
	163	char c;
	164	int nc, nl, n;
	165	struct sgttyb sb;
	166	char dialer_buf[64];
	167	struct baud_msg *bm;
	168	int (*f)();
	169
	170	if (cour_swallow("\r\n") == 0)
	171	return (0);
	172	f = signal(SIGALRM, sigALRM);
	173	again:
	174	nc = 0; nl = sizeof(dialer_buf)-1;
	175	bzero(dialer_buf, sizeof(dialer_buf));
	176	timeout = 0;
	177	for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
	178	if (setjmp(timeoutbuf))
	179	break;
	180	alarm(number(value(DIALTIMEOUT)));
	181	n = read(FD, &c, 1);
	182	alarm(0);
	183	if (n <= 0)
	184	break;
	185	c &= 0x7f;
	186	if (c == '\r') {
	187	if (cour_swallow("\n") == 0)
	188	break;
	189	if (!dialer_buf[0])
	190	goto again;
fb6da896 MK	191	if (strcmp(dialer_buf, "RINGING") == 0 &&
	192	boolean(value(VERBOSE))) {
	193	#ifdef DEBUG
1485b502	194	printf("%s\r\n", dialer_buf);
fb6da896	195	#endif
1485b502 DS	196	goto again;
	197	}
	198	if (strncmp(dialer_buf, "CONNECT",
	199	sizeof("CONNECT")-1) != 0)
	200	break;
	201	for (bm = baud_msg ; bm ; bm++)
	202	if (strcmp(bm->msg,
	203	dialer_buf+sizeof("CONNECT")-1) == 0) {
	204	if (ioctl(FD, TIOCGETP, &sb) < 0) {
	205	perror("TIOCGETP");
	206	goto error;
	207	}
	208	sb.sg_ispeed = sb.sg_ospeed = bm->baud;
	209	if (ioctl(FD, TIOCSETP, &sb) < 0) {
	210	perror("TIOCSETP");
	211	goto error;
	212	}
	213	signal(SIGALRM, f);
fb6da896	214	#ifdef DEBUG
1485b502 DS	215	if (boolean(value(VERBOSE)))
1485b502 DS	216	printf("%s\r\n", dialer_buf);
fb6da896	217	#endif
1485b502 DS	218	return (1);
	219	}
	220	break;
	221	}
	222	dialer_buf[nc] = c;
	223	#ifdef notdef
	224	if (boolean(value(VERBOSE)))
	225	putchar(c);
	226	#endif
	227	}
	228	error1:
	229	printf("%s\r\n", dialer_buf);
	230	error:
	231	signal(SIGALRM, f);
	232	return (0);
	233	}
	234
	235	/*
	236	* This convoluted piece of code attempts to get
fb6da896	237	* the courier in sync.
1485b502 DS	238	*/
	239	static int
	240	coursync()
	241	{
	242	int already = 0;
fb6da896 MK	243	int len;
fb6da896 MK	244	char buf[40];
1485b502	245
1485b502 DS	246	while (already++ < MAXRETRY) {
	247	ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
	248	write(FD, "\rAT Z\r", 6); /* reset modem */
fb6da896	249	bzero(buf, sizeof(buf));
1485b502	250	sleep(1);
fb6da896 MK	251	ioctl(FD, FIONREAD, &len);
	252	if (len) {
	253	len = read(FD, buf, sizeof(buf));
	254	#ifdef DEBUG
	255	buf[len] = '\0';
	256	printf("coursync: (\"%s\")\n\r", buf);
	257	#endif
	258	if (index(buf, '0') \|\|
	259	(index(buf, 'O') && index(buf, 'K')))
	260	return(1);
1485b502	261	}
fb6da896 MK	262	/*
	263	* If not strapped for DTR control,
	264	* try to get command mode.
	265	*/
	266	sleep(1);
1485b502	267	write(FD, "+++", 3);
fb6da896 MK	268	sleep(1);
	269	/*
	270	* Toggle DTR to force anyone off that might have left
	271	* the modem connected.
	272	*/
	273	ioctl(FD, TIOCCDTR, 0);
	274	sleep(1);
	275	ioctl(FD, TIOCSDTR, 0);
1485b502 DS	276	}
1485b502 DS	277	write(FD, "\rAT Z\r", 6);
fb6da896	278	return (0);
1485b502 DS	279	}
	280
	281	#undef write
	282
	283	cour_write(fd, cp, n)
	284	int fd;
	285	char *cp;
	286	int n;
	287	{
	288	struct sgttyb sb;
fb6da896	289	#ifdef notdef
1485b502 DS	290	if (boolean(value(VERBOSE)))
1485b502 DS	291	write(1, cp, n);
fb6da896	292	#endif
1485b502 DS	293	ioctl(fd, TIOCGETP, &sb);
	294	ioctl(fd, TIOCSETP, &sb);
	295	cour_nap();
	296	for ( ; n-- ; cp++) {
	297	write(fd, cp, 1);
	298	ioctl(fd, TIOCGETP, &sb);
	299	ioctl(fd, TIOCSETP, &sb);
	300	cour_nap();
	301	}
	302	}
	303
fb6da896	304	#ifdef DEBUG
1485b502 DS	305	verbose_read()
	306	{
	307	int n = 0;
	308	char buf[BUFSIZ];
fb6da896	309
1485b502 DS	310	if (ioctl(FD, FIONREAD, &n) < 0)
	311	return;
	312	if (n <= 0)
	313	return;
	314	if (read(FD, buf, n) != n)
	315	return;
	316	write(1, buf, n);
	317	}
fb6da896	318	#endif
1485b502 DS	319
	320	/*
	321	* Code stolen from /usr/src/lib/libc/gen/sleep.c
	322	*/
	323	#include <sys/time.h>
	324
	325	#define mask(s) (1<<((s)-1))
	326	#define setvec(vec, a) \
	327	vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
	328
	329	static napms = 50; /* Give the courier 50 milliseconds between characters */
	330
	331	static int ringring;
	332
	333	cour_nap()
	334	{
	335
	336	static int cour_napx();
	337	int omask;
	338	struct itimerval itv, oitv;
	339	register struct itimerval *itp = &itv;
	340	struct sigvec vec, ovec;
	341
	342	timerclear(&itp->it_interval);
	343	timerclear(&itp->it_value);
	344	if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
	345	return;
	346	setvec(ovec, SIG_DFL);
	347	omask = sigblock(mask(SIGALRM));
	348	itp->it_value.tv_sec = napms/1000;
	349	itp->it_value.tv_usec = ((napms%1000)*1000);
	350	setvec(vec, cour_napx);
	351	ringring = 0;
	352	(void) sigvec(SIGALRM, &vec, &ovec);
	353	(void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
	354	while (!ringring)
	355	sigpause(omask &~ mask(SIGALRM));
	356	(void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
	357	(void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
	358	(void) sigsetmask(omask);
	359	}
	360
	361	static
	362	cour_napx()
	363	{
	364	ringring = 1;
	365	}