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

/*
 * Copyright (c) 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
static char sccsid[] = "@(#)courier.c	5.2 (Berkeley) %G%";
#endif

#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 DS	1	/*
	2	* Copyright (c) 1986 Regents of the University of California.
	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*/
	6
	7	#ifndef lint
fb6da896	8	static char sccsid[] = "@(#)courier.c 5.2 (Berkeley) %G%";
1485b502 DS	9	#endif
	10
	11	#define write cour_write
	12	/*
fb6da896 MK	13	* Routines for calling up on a Courier modem.
fb6da896 MK	14	* Derived from Hayes driver.
1485b502 DS	15	*/
	16	#include "tip.h"
	17	#include <stdio.h>
	18
	19	#define MAXRETRY 5
	20
	21	static int sigALRM();
	22	static int timeout = 0;
fb6da896	23	static int connected = 0;
1485b502 DS	24	static jmp_buf timeoutbuf, intbuf;
	25	static int (*osigint)();
	26
	27	cour_dialer(num, acu)
	28	register char *num;
	29	char *acu;
	30	{
	31	register char *cp;
1485b502 DS	32	#ifdef ACULOG
	33	char line[80];
	34	#endif
	35	if (boolean(value(VERBOSE)))
	36	printf("Using \"%s\"\n", acu);
	37
	38	ioctl(FD, TIOCHPCL, 0);
	39	/*
	40	* Get in synch.
	41	*/
	42	if (!coursync()) {
fb6da896	43	badsynch:
1485b502 DS	44	printf("can't synchronize with courier\n");
	45	#ifdef ACULOG
	46	logent(value(HOST), num, "courier", "can't synch up");
	47	#endif
	48	return (0);
	49	}
fb6da896 MK	50	write(FD, "AT E0\r", 6); /* turn off echoing */
	51	sleep(1);
	52	#ifdef DEBUG
	53	if (boolean(value(VERBOSE)))
	54	verbose_read();
	55	#endif
	56	ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
	57	write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
	58	if (!cour_swallow("\r\nOK\r\n"))
	59	goto badsynch;
1485b502 DS	60	fflush(stdout);
	61	write(FD, "AT D", 4);
	62	for (cp = num; *cp; cp++)
	63	if (*cp == '=')
	64	*cp = ',';
	65	write(FD, num, strlen(num));
	66	write(FD, "\r", 1);
	67	connected = cour_connect();
	68	#ifdef ACULOG
	69	if (timeout) {
	70	sprintf(line, "%d second dial timeout",
	71	number(value(DIALTIMEOUT)));
	72	logent(value(HOST), num, "cour", line);
	73	}
	74	#endif
	75	if (timeout)
	76	cour_disconnect();
	77	return (connected);
	78	}
	79
	80	cour_disconnect()
fb6da896 MK	81	{
	82	/* first hang up the modem*/
	83	ioctl(FD, TIOCCDTR, 0);
	84	sleep(1);
	85	ioctl(FD, TIOCSDTR, 0);
	86	coursync(); /* reset */
1485b502 DS	87	close(FD);
	88	}
	89
	90	cour_abort()
fb6da896 MK	91	{
	92	write(FD, "\r", 1); /* send anything to abort the call */
	93	cour_disconnect();
1485b502 DS	94	}
	95
	96	static int
	97	sigALRM()
	98	{
	99	printf("\07timeout waiting for reply\n");
	100	timeout = 1;
	101	longjmp(timeoutbuf, 1);
	102	}
	103
	104	static int
	105	cour_swallow(match)
	106	register char *match;
	107	{
	108	char c;
	109	int (*f)();
	110
	111	f = signal(SIGALRM, sigALRM);
	112	timeout = 0;
	113	do {
	114	if (*match =='\0') {
	115	signal(SIGALRM, f);
fb6da896	116	return (1);
1485b502 DS	117	}
	118	if (setjmp(timeoutbuf)) {
	119	signal(SIGALRM, f);
	120	return (0);
	121	}
	122	alarm(number(value(DIALTIMEOUT)));
	123	read(FD, &c, 1);
	124	alarm(0);
	125	c &= 0177;
fb6da896	126	#ifdef DEBUG
1485b502 DS	127	if (boolean(value(VERBOSE)))
1485b502 DS	128	putchar(c);
fb6da896	129	#endif
1485b502	130	} while (c == *match++);
fb6da896	131	#ifdef DEBUG
1485b502 DS	132	if (boolean(value(VERBOSE)))
1485b502 DS	133	fflush(stdout);
fb6da896	134	#endif
1485b502 DS	135	signal(SIGALRM, SIG_DFL);
	136	return (0);
	137	}
	138
	139	struct baud_msg {
	140	char *msg;
	141	int baud;
	142	} baud_msg[] = {
	143	"", B300,
	144	" 1200", B1200,
	145	" 2400", B2400,
	146	0, 0,
	147	};
	148
	149	static int
	150	cour_connect()
	151	{
	152	char c;
	153	int nc, nl, n;
	154	struct sgttyb sb;
	155	char dialer_buf[64];
	156	struct baud_msg *bm;
	157	int (*f)();
	158
	159	if (cour_swallow("\r\n") == 0)
	160	return (0);
	161	f = signal(SIGALRM, sigALRM);
	162	again:
	163	nc = 0; nl = sizeof(dialer_buf)-1;
	164	bzero(dialer_buf, sizeof(dialer_buf));
	165	timeout = 0;
	166	for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
	167	if (setjmp(timeoutbuf))
	168	break;
	169	alarm(number(value(DIALTIMEOUT)));
	170	n = read(FD, &c, 1);
	171	alarm(0);
	172	if (n <= 0)
	173	break;
	174	c &= 0x7f;
	175	if (c == '\r') {
	176	if (cour_swallow("\n") == 0)
	177	break;
	178	if (!dialer_buf[0])
	179	goto again;
fb6da896 MK	180	if (strcmp(dialer_buf, "RINGING") == 0 &&
	181	boolean(value(VERBOSE))) {
	182	#ifdef DEBUG
1485b502	183	printf("%s\r\n", dialer_buf);
fb6da896	184	#endif
1485b502 DS	185	goto again;
	186	}
	187	if (strncmp(dialer_buf, "CONNECT",
	188	sizeof("CONNECT")-1) != 0)
	189	break;
	190	for (bm = baud_msg ; bm ; bm++)
	191	if (strcmp(bm->msg,
	192	dialer_buf+sizeof("CONNECT")-1) == 0) {
	193	if (ioctl(FD, TIOCGETP, &sb) < 0) {
	194	perror("TIOCGETP");
	195	goto error;
	196	}
	197	sb.sg_ispeed = sb.sg_ospeed = bm->baud;
	198	if (ioctl(FD, TIOCSETP, &sb) < 0) {
	199	perror("TIOCSETP");
	200	goto error;
	201	}
	202	signal(SIGALRM, f);
fb6da896	203	#ifdef DEBUG
1485b502 DS	204	if (boolean(value(VERBOSE)))
1485b502 DS	205	printf("%s\r\n", dialer_buf);
fb6da896	206	#endif
1485b502 DS	207	return (1);
	208	}
	209	break;
	210	}
	211	dialer_buf[nc] = c;
	212	#ifdef notdef
	213	if (boolean(value(VERBOSE)))
	214	putchar(c);
	215	#endif
	216	}
	217	error1:
	218	printf("%s\r\n", dialer_buf);
	219	error:
	220	signal(SIGALRM, f);
	221	return (0);
	222	}
	223
	224	/*
	225	* This convoluted piece of code attempts to get
fb6da896	226	* the courier in sync.
1485b502 DS	227	*/
	228	static int
	229	coursync()
	230	{
	231	int already = 0;
fb6da896 MK	232	int len;
fb6da896 MK	233	char buf[40];
1485b502	234
1485b502 DS	235	while (already++ < MAXRETRY) {
	236	ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
	237	write(FD, "\rAT Z\r", 6); /* reset modem */
fb6da896	238	bzero(buf, sizeof(buf));
1485b502	239	sleep(1);
fb6da896 MK	240	ioctl(FD, FIONREAD, &len);
	241	if (len) {
	242	len = read(FD, buf, sizeof(buf));
	243	#ifdef DEBUG
	244	buf[len] = '\0';
	245	printf("coursync: (\"%s\")\n\r", buf);
	246	#endif
	247	if (index(buf, '0') \|\|
	248	(index(buf, 'O') && index(buf, 'K')))
	249	return(1);
1485b502	250	}
fb6da896 MK	251	/*
	252	* If not strapped for DTR control,
	253	* try to get command mode.
	254	*/
	255	sleep(1);
1485b502	256	write(FD, "+++", 3);
fb6da896 MK	257	sleep(1);
	258	/*
	259	* Toggle DTR to force anyone off that might have left
	260	* the modem connected.
	261	*/
	262	ioctl(FD, TIOCCDTR, 0);
	263	sleep(1);
	264	ioctl(FD, TIOCSDTR, 0);
1485b502 DS	265	}
1485b502 DS	266	write(FD, "\rAT Z\r", 6);
fb6da896	267	return (0);
1485b502 DS	268	}
	269
	270	#undef write
	271
	272	cour_write(fd, cp, n)
	273	int fd;
	274	char *cp;
	275	int n;
	276	{
	277	struct sgttyb sb;
fb6da896	278	#ifdef notdef
1485b502 DS	279	if (boolean(value(VERBOSE)))
1485b502 DS	280	write(1, cp, n);
fb6da896	281	#endif
1485b502 DS	282	ioctl(fd, TIOCGETP, &sb);
	283	ioctl(fd, TIOCSETP, &sb);
	284	cour_nap();
	285	for ( ; n-- ; cp++) {
	286	write(fd, cp, 1);
	287	ioctl(fd, TIOCGETP, &sb);
	288	ioctl(fd, TIOCSETP, &sb);
	289	cour_nap();
	290	}
	291	}
	292
fb6da896	293	#ifdef DEBUG
1485b502 DS	294	verbose_read()
	295	{
	296	int n = 0;
	297	char buf[BUFSIZ];
fb6da896	298
1485b502 DS	299	if (ioctl(FD, FIONREAD, &n) < 0)
	300	return;
	301	if (n <= 0)
	302	return;
	303	if (read(FD, buf, n) != n)
	304	return;
	305	write(1, buf, n);
	306	}
fb6da896	307	#endif
1485b502 DS	308
	309	/*
	310	* Code stolen from /usr/src/lib/libc/gen/sleep.c
	311	*/
	312	#include <sys/time.h>
	313
	314	#define mask(s) (1<<((s)-1))
	315	#define setvec(vec, a) \
	316	vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
	317
	318	static napms = 50; /* Give the courier 50 milliseconds between characters */
	319
	320	static int ringring;
	321
	322	cour_nap()
	323	{
	324
	325	static int cour_napx();
	326	int omask;
	327	struct itimerval itv, oitv;
	328	register struct itimerval *itp = &itv;
	329	struct sigvec vec, ovec;
	330
	331	timerclear(&itp->it_interval);
	332	timerclear(&itp->it_value);
	333	if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
	334	return;
	335	setvec(ovec, SIG_DFL);
	336	omask = sigblock(mask(SIGALRM));
	337	itp->it_value.tv_sec = napms/1000;
	338	itp->it_value.tv_usec = ((napms%1000)*1000);
	339	setvec(vec, cour_napx);
	340	ringring = 0;
	341	(void) sigvec(SIGALRM, &vec, &ovec);
	342	(void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
	343	while (!ringring)
	344	sigpause(omask &~ mask(SIGALRM));
	345	(void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
	346	(void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
	347	(void) sigsetmask(omask);
	348	}
	349
	350	static
	351	cour_napx()
	352	{
	353	ringring = 1;
	354	}