[openssh.git] / ttymodes.c

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */

/*
 * SSH2 tty modes support by Kevin Steves.
 * Copyright (c) 2001 Kevin Steves.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Encoding and decoding of terminal modes in a portable way.
 * Much of the format is defined in ttymodes.h; it is included multiple times
 * into this file with the appropriate macro definitions to generate the
 * suitable code.
 */

#include "includes.h"
RCSID("$OpenBSD: ttymodes.c,v 1.12 2001/04/14 16:33:20 stevesk Exp $");

#include "packet.h"
#include "log.h"
#include "ssh1.h"
#include "compat.h"
#include "buffer.h"
#include "bufaux.h"

#define TTY_OP_END		0
/*
 * uint32 (u_int) follows speed in SSH1 and SSH2
 */
#define TTY_OP_ISPEED_PROTO1	192
#define TTY_OP_OSPEED_PROTO1	193
#define TTY_OP_ISPEED_PROTO2	128
#define TTY_OP_OSPEED_PROTO2	129

/*
 * Converts POSIX speed_t to a baud rate.  The values of the
 * constants for speed_t are not themselves portable.
 */
static int
speed_to_baud(speed_t speed)
{
	switch (speed) {
	case B0:
		return 0;
	case B50:
		return 50;
	case B75:
		return 75;
	case B110:
		return 110;
	case B134:
		return 134;
	case B150:
		return 150;
	case B200:
		return 200;
	case B300:
		return 300;
	case B600:
		return 600;
	case B1200:
		return 1200;
	case B1800:
		return 1800;
	case B2400:
		return 2400;
	case B4800:
		return 4800;
	case B9600:
		return 9600;

#ifdef B19200
	case B19200:
		return 19200;
#else /* B19200 */
#ifdef EXTA
	case EXTA:
		return 19200;
#endif /* EXTA */
#endif /* B19200 */

#ifdef B38400
	case B38400:
		return 38400;
#else /* B38400 */
#ifdef EXTB
	case EXTB:
		return 38400;
#endif /* EXTB */
#endif /* B38400 */

#ifdef B7200
	case B7200:
		return 7200;
#endif /* B7200 */
#ifdef B14400
	case B14400:
		return 14400;
#endif /* B14400 */
#ifdef B28800
	case B28800:
		return 28800;
#endif /* B28800 */
#ifdef B57600
	case B57600:
		return 57600;
#endif /* B57600 */
#ifdef B76800
	case B76800:
		return 76800;
#endif /* B76800 */
#ifdef B115200
	case B115200:
		return 115200;
#endif /* B115200 */
#ifdef B230400
	case B230400:
		return 230400;
#endif /* B230400 */
	default:
		return 9600;
	}
}

/*
 * Converts a numeric baud rate to a POSIX speed_t.
 */
static speed_t
baud_to_speed(int baud)
{
	switch (baud) {
	case 0:
		return B0;
	case 50:
		return B50;
	case 75:
		return B75;
	case 110:
		return B110;
	case 134:
		return B134;
	case 150:
		return B150;
	case 200:
		return B200;
	case 300:
		return B300;
	case 600:
		return B600;
	case 1200:
		return B1200;
	case 1800:
		return B1800;
	case 2400:
		return B2400;
	case 4800:
		return B4800;
	case 9600:
		return B9600;

#ifdef B19200
	case 19200:
		return B19200;
#else /* B19200 */
#ifdef EXTA
	case 19200:
		return EXTA;
#endif /* EXTA */
#endif /* B19200 */

#ifdef B38400
	case 38400:
		return B38400;
#else /* B38400 */
#ifdef EXTB
	case 38400:
		return EXTB;
#endif /* EXTB */
#endif /* B38400 */

#ifdef B7200
	case 7200:
		return B7200;
#endif /* B7200 */
#ifdef B14400
	case 14400:
		return B14400;
#endif /* B14400 */
#ifdef B28800
	case 28800:
		return B28800;
#endif /* B28800 */
#ifdef B57600
	case 57600:
		return B57600;
#endif /* B57600 */
#ifdef B76800
	case 76800:
		return B76800;
#endif /* B76800 */
#ifdef B115200
	case 115200:
		return B115200;
#endif /* B115200 */
#ifdef B230400
	case 230400:
		return B230400;
#endif /* B230400 */
	default:
		return B9600;
	}
}

/*
 * Encodes terminal modes for the terminal referenced by fd
 * or tiop in a portable manner, and appends the modes to a packet
 * being constructed.
 */
void
tty_make_modes(int fd, struct termios *tiop)
{
	struct termios tio;
	int baud;
	Buffer buf;
	int tty_op_ospeed, tty_op_ispeed;
	void (*put_arg)(Buffer *, u_int);

	buffer_init(&buf);
	if (compat20) {
		tty_op_ospeed = TTY_OP_OSPEED_PROTO2;
		tty_op_ispeed = TTY_OP_ISPEED_PROTO2;
		put_arg = buffer_put_int;
	} else {
		tty_op_ospeed = TTY_OP_OSPEED_PROTO1;
		tty_op_ispeed = TTY_OP_ISPEED_PROTO1;
		put_arg = (void (*)(Buffer *, u_int)) buffer_put_char;
	}

	if (tiop == NULL) {
		if (tcgetattr(fd, &tio) == -1) {
			log("tcgetattr: %.100s", strerror(errno));
			goto end;
		}
	} else
		tio = *tiop;

	/* Store input and output baud rates. */
	baud = speed_to_baud(cfgetospeed(&tio));
	debug2("tty_make_modes: ospeed %d", baud);
	buffer_put_char(&buf, tty_op_ospeed);
	buffer_put_int(&buf, baud);
	baud = speed_to_baud(cfgetispeed(&tio));
	debug2("tty_make_modes: ispeed %d", baud);
	buffer_put_char(&buf, tty_op_ispeed);
	buffer_put_int(&buf, baud);

	/* Store values of mode flags. */
#define TTYCHAR(NAME, OP) \
	debug2("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
	buffer_put_char(&buf, OP); \
	put_arg(&buf, tio.c_cc[NAME]);

#define TTYMODE(NAME, FIELD, OP) \
	debug2("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
	buffer_put_char(&buf, OP); \
	put_arg(&buf, ((tio.FIELD & NAME) != 0));

#include "ttymodes.h"

#undef TTYCHAR
#undef TTYMODE

end:
	/* Mark end of mode data. */
	buffer_put_char(&buf, TTY_OP_END);
	if (compat20)
		packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
	else
		packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
	buffer_free(&buf);
	return;
}

/*
 * Decodes terminal modes for the terminal referenced by fd in a portable
 * manner from a packet being read.
 */
void
tty_parse_modes(int fd, int *n_bytes_ptr)
{
	struct termios tio;
	int opcode, baud;
	int n_bytes = 0;
	int failure = 0;
	u_int (*get_arg)(void);
	int arg, arg_size;

	if (compat20) {
		*n_bytes_ptr = packet_get_int();
		debug2("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
		if (*n_bytes_ptr == 0)
			return;
		get_arg = packet_get_int;
		arg_size = 4;
	} else {
		get_arg = packet_get_char;
		arg_size = 1;
	}

	/*
	 * Get old attributes for the terminal.  We will modify these
	 * flags. I am hoping that if there are any machine-specific
	 * modes, they will initially have reasonable values.
	 */
	if (tcgetattr(fd, &tio) == -1) {
		log("tcgetattr: %.100s", strerror(errno));
		failure = -1;
	}

	for (;;) {
		n_bytes += 1;
		opcode = packet_get_char();
		switch (opcode) {
		case TTY_OP_END:
			goto set;

		/* XXX: future conflict possible */
		case TTY_OP_ISPEED_PROTO1:
		case TTY_OP_ISPEED_PROTO2:
			n_bytes += 4;
			baud = packet_get_int();
			debug2("tty_parse_modes: ispeed %d", baud);
			if (failure != -1 && cfsetispeed(&tio, baud_to_speed(baud)) == -1)
				error("cfsetispeed failed for %d", baud);
			break;

		/* XXX: future conflict possible */
		case TTY_OP_OSPEED_PROTO1:
		case TTY_OP_OSPEED_PROTO2:
			n_bytes += 4;
			baud = packet_get_int();
			debug2("tty_parse_modes: ospeed %d", baud);
			if (failure != -1 && cfsetospeed(&tio, baud_to_speed(baud)) == -1)
				error("cfsetospeed failed for %d", baud);
			break;

#define TTYCHAR(NAME, OP) \
	case OP: \
	  n_bytes += arg_size; \
	  tio.c_cc[NAME] = get_arg(); \
	  debug2("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
	  break;
#define TTYMODE(NAME, FIELD, OP) \
	case OP: \
	  n_bytes += arg_size; \
	  if ((arg = get_arg())) \
	    tio.FIELD |= NAME; \
	  else \
	    tio.FIELD &= ~NAME;	\
	  debug2("tty_parse_modes: %d %d", OP, arg); \
	  break;

#include "ttymodes.h"

#undef TTYCHAR
#undef TTYMODE

		default:
			debug("Ignoring unsupported tty mode opcode %d (0x%x)",
			      opcode, opcode);
			if (!compat20) {
				/*
				 * SSH1:
				 * Opcodes 1 to 127 are defined to have
				 * a one-byte argument.
  				 * Opcodes 128 to 159 are defined to have
  				 * an integer argument.
  				 */
				if (opcode > 0 && opcode < 128) {
					n_bytes += 1;
					(void) packet_get_char();
					break;
				} else if (opcode >= 128 && opcode < 160) {
  					n_bytes += 4;
  					(void) packet_get_int();
  					break;
				} else {
					/*
					 * It is a truly undefined opcode (160 to 255).
					 * We have no idea about its arguments.  So we
					 * must stop parsing.  Note that some data may be
					 * left in the packet; hopefully there is nothing
					 * more coming after the mode data.
					 */
					log("parse_tty_modes: unknown opcode %d", opcode);
					packet_integrity_check(0, 1, SSH_CMSG_REQUEST_PTY);
					goto set;
  				}
			} else {
				/*
				 * SSH2:
				 * Opcodes 0 to 159 are defined to have
				 * a uint32 argument.
				 * Opcodes 160 to 255 are undefined and
				 * cause parsing to stop.
				 */
				if (opcode > 0 && opcode < 160) {
					n_bytes += 4;
					(void) packet_get_int();
					break;
				} else {
					log("parse_tty_modes: unknown opcode %d", opcode);
					goto set;
				}
  			}
		}
	}

set:
	if (*n_bytes_ptr != n_bytes) {
		*n_bytes_ptr = n_bytes;
		log("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
		    *n_bytes_ptr, n_bytes);
		return;		/* Don't process bytes passed */
	}
	if (failure == -1)
		return;		/* Packet parsed ok but tty stuff failed */

	/* Set the new modes for the terminal. */
	if (tcsetattr(fd, TCSANOW, &tio) == -1)
		log("Setting tty modes failed: %.100s", strerror(errno));
	return;
}
Commit	Line	Data
8efc0c15	1	/*
5260325f	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	4	* All rights reserved
bcbf86ec	5	*
	6	* As far as I am concerned, the code I have written for this software
	7	* can be used freely for any purpose. Any derived versions of this
	8	* software must be clearly marked as such, and if the derived work is
	9	* incompatible with the protocol description in the RFC file, it must be
	10	* called by a name other than "ssh" or "Secure Shell".
5260325f	11	*/
8efc0c15	12
30dcc918	13	/*
	14	* SSH2 tty modes support by Kevin Steves.
	15	* Copyright (c) 2001 Kevin Steves. All rights reserved.
	16	*
	17	* Redistribution and use in source and binary forms, with or without
	18	* modification, are permitted provided that the following conditions
	19	* are met:
	20	* 1. Redistributions of source code must retain the above copyright
	21	* notice, this list of conditions and the following disclaimer.
	22	* 2. Redistributions in binary form must reproduce the above copyright
	23	* notice, this list of conditions and the following disclaimer in the
	24	* documentation and/or other materials provided with the distribution.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	27	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	28	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	29	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	30	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	31	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	32	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	33	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	34	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	35	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	36	*/
	37
	38	/*
	39	* Encoding and decoding of terminal modes in a portable way.
	40	* Much of the format is defined in ttymodes.h; it is included multiple times
	41	* into this file with the appropriate macro definitions to generate the
	42	* suitable code.
	43	*/
	44
8efc0c15	45	#include "includes.h"
30dcc918	46	RCSID("$OpenBSD: ttymodes.c,v 1.12 2001/04/14 16:33:20 stevesk Exp $");
8efc0c15	47
8efc0c15	48	#include "packet.h"
42f11eb2	49	#include "log.h"
42f11eb2	50	#include "ssh1.h"
30dcc918	51	#include "compat.h"
	52	#include "buffer.h"
	53	#include "bufaux.h"
8efc0c15	54
30dcc918	55	#define TTY_OP_END 0
	56	/*
	57	* uint32 (u_int) follows speed in SSH1 and SSH2
	58	*/
	59	#define TTY_OP_ISPEED_PROTO1 192
	60	#define TTY_OP_OSPEED_PROTO1 193
	61	#define TTY_OP_ISPEED_PROTO2 128
	62	#define TTY_OP_OSPEED_PROTO2 129
8efc0c15	63
5260325f	64	/*
	65	* Converts POSIX speed_t to a baud rate. The values of the
	66	* constants for speed_t are not themselves portable.
	67	*/
6ae2364d	68	static int
5260325f	69	speed_to_baud(speed_t speed)
8efc0c15	70	{
5260325f	71	switch (speed) {
	72	case B0:
	73	return 0;
	74	case B50:
	75	return 50;
	76	case B75:
	77	return 75;
	78	case B110:
	79	return 110;
	80	case B134:
	81	return 134;
	82	case B150:
	83	return 150;
	84	case B200:
	85	return 200;
	86	case B300:
	87	return 300;
	88	case B600:
	89	return 600;
	90	case B1200:
	91	return 1200;
	92	case B1800:
	93	return 1800;
	94	case B2400:
	95	return 2400;
	96	case B4800:
	97	return 4800;
	98	case B9600:
	99	return 9600;
8efc0c15	100
8efc0c15	101	#ifdef B19200
5260325f	102	case B19200:
5260325f	103	return 19200;
8efc0c15	104	#else /* B19200 */
8efc0c15	105	#ifdef EXTA
5260325f	106	case EXTA:
5260325f	107	return 19200;
8efc0c15	108	#endif /* EXTA */
	109	#endif /* B19200 */
	110
	111	#ifdef B38400
5260325f	112	case B38400:
5260325f	113	return 38400;
8efc0c15	114	#else /* B38400 */
8efc0c15	115	#ifdef EXTB
5260325f	116	case EXTB:
5260325f	117	return 38400;
8efc0c15	118	#endif /* EXTB */
	119	#endif /* B38400 */
	120
	121	#ifdef B7200
5260325f	122	case B7200:
5260325f	123	return 7200;
8efc0c15	124	#endif /* B7200 */
8efc0c15	125	#ifdef B14400
5260325f	126	case B14400:
5260325f	127	return 14400;
8efc0c15	128	#endif /* B14400 */
8efc0c15	129	#ifdef B28800
5260325f	130	case B28800:
5260325f	131	return 28800;
8efc0c15	132	#endif /* B28800 */
8efc0c15	133	#ifdef B57600
5260325f	134	case B57600:
5260325f	135	return 57600;
8efc0c15	136	#endif /* B57600 */
8efc0c15	137	#ifdef B76800
5260325f	138	case B76800:
5260325f	139	return 76800;
8efc0c15	140	#endif /* B76800 */
8efc0c15	141	#ifdef B115200
5260325f	142	case B115200:
5260325f	143	return 115200;
8efc0c15	144	#endif /* B115200 */
8efc0c15	145	#ifdef B230400
5260325f	146	case B230400:
5260325f	147	return 230400;
8efc0c15	148	#endif /* B230400 */
5260325f	149	default:
	150	return 9600;
	151	}
8efc0c15	152	}
8efc0c15	153
5260325f	154	/*
	155	* Converts a numeric baud rate to a POSIX speed_t.
	156	*/
6ae2364d	157	static speed_t
5260325f	158	baud_to_speed(int baud)
8efc0c15	159	{
5260325f	160	switch (baud) {
30dcc918	161	case 0:
5260325f	162	return B0;
	163	case 50:
	164	return B50;
	165	case 75:
	166	return B75;
	167	case 110:
	168	return B110;
	169	case 134:
	170	return B134;
	171	case 150:
	172	return B150;
	173	case 200:
	174	return B200;
	175	case 300:
	176	return B300;
	177	case 600:
	178	return B600;
	179	case 1200:
	180	return B1200;
	181	case 1800:
	182	return B1800;
	183	case 2400:
	184	return B2400;
	185	case 4800:
	186	return B4800;
	187	case 9600:
	188	return B9600;
8efc0c15	189
8efc0c15	190	#ifdef B19200
5260325f	191	case 19200:
5260325f	192	return B19200;
8efc0c15	193	#else /* B19200 */
8efc0c15	194	#ifdef EXTA
5260325f	195	case 19200:
5260325f	196	return EXTA;
8efc0c15	197	#endif /* EXTA */
	198	#endif /* B19200 */
	199
	200	#ifdef B38400
5260325f	201	case 38400:
5260325f	202	return B38400;
8efc0c15	203	#else /* B38400 */
8efc0c15	204	#ifdef EXTB
5260325f	205	case 38400:
5260325f	206	return EXTB;
8efc0c15	207	#endif /* EXTB */
	208	#endif /* B38400 */
	209
	210	#ifdef B7200
5260325f	211	case 7200:
5260325f	212	return B7200;
8efc0c15	213	#endif /* B7200 */
8efc0c15	214	#ifdef B14400
5260325f	215	case 14400:
5260325f	216	return B14400;
8efc0c15	217	#endif /* B14400 */
8efc0c15	218	#ifdef B28800
5260325f	219	case 28800:
5260325f	220	return B28800;
8efc0c15	221	#endif /* B28800 */
8efc0c15	222	#ifdef B57600
5260325f	223	case 57600:
5260325f	224	return B57600;
8efc0c15	225	#endif /* B57600 */
8efc0c15	226	#ifdef B76800
5260325f	227	case 76800:
5260325f	228	return B76800;
8efc0c15	229	#endif /* B76800 */
8efc0c15	230	#ifdef B115200
5260325f	231	case 115200:
5260325f	232	return B115200;
8efc0c15	233	#endif /* B115200 */
8efc0c15	234	#ifdef B230400
5260325f	235	case 230400:
5260325f	236	return B230400;
8efc0c15	237	#endif /* B230400 */
5260325f	238	default:
	239	return B9600;
	240	}
8efc0c15	241	}
8efc0c15	242
5260325f	243	/*
5260325f	244	* Encodes terminal modes for the terminal referenced by fd
30dcc918	245	* or tiop in a portable manner, and appends the modes to a packet
5260325f	246	* being constructed.
5260325f	247	*/
6ae2364d	248	void
30dcc918	249	tty_make_modes(int fd, struct termios *tiop)
8efc0c15	250	{
5260325f	251	struct termios tio;
5260325f	252	int baud;
30dcc918	253	Buffer buf;
	254	int tty_op_ospeed, tty_op_ispeed;
	255	void (put_arg)(Buffer , u_int);
5260325f	256
30dcc918	257	buffer_init(&buf);
	258	if (compat20) {
	259	tty_op_ospeed = TTY_OP_OSPEED_PROTO2;
	260	tty_op_ispeed = TTY_OP_ISPEED_PROTO2;
	261	put_arg = buffer_put_int;
	262	} else {
	263	tty_op_ospeed = TTY_OP_OSPEED_PROTO1;
	264	tty_op_ispeed = TTY_OP_ISPEED_PROTO1;
	265	put_arg = (void ()(Buffer , u_int)) buffer_put_char;
5260325f	266	}
30dcc918	267
	268	if (tiop == NULL) {
	269	if (tcgetattr(fd, &tio) == -1) {
	270	log("tcgetattr: %.100s", strerror(errno));
	271	goto end;
	272	}
	273	} else
	274	tio = *tiop;
	275
5260325f	276	/* Store input and output baud rates. */
5260325f	277	baud = speed_to_baud(cfgetospeed(&tio));
30dcc918	278	debug2("tty_make_modes: ospeed %d", baud);
	279	buffer_put_char(&buf, tty_op_ospeed);
	280	buffer_put_int(&buf, baud);
5260325f	281	baud = speed_to_baud(cfgetispeed(&tio));
30dcc918	282	debug2("tty_make_modes: ispeed %d", baud);
	283	buffer_put_char(&buf, tty_op_ispeed);
	284	buffer_put_int(&buf, baud);
5260325f	285
5260325f	286	/* Store values of mode flags. */
8efc0c15	287	#define TTYCHAR(NAME, OP) \
30dcc918	288	debug2("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
	289	buffer_put_char(&buf, OP); \
	290	put_arg(&buf, tio.c_cc[NAME]);
	291
8efc0c15	292	#define TTYMODE(NAME, FIELD, OP) \
30dcc918	293	debug2("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
	294	buffer_put_char(&buf, OP); \
	295	put_arg(&buf, ((tio.FIELD & NAME) != 0));
8efc0c15	296
	297	#include "ttymodes.h"
	298
	299	#undef TTYCHAR
	300	#undef TTYMODE
8efc0c15	301
30dcc918	302	end:
5260325f	303	/* Mark end of mode data. */
30dcc918	304	buffer_put_char(&buf, TTY_OP_END);
	305	if (compat20)
	306	packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
	307	else
	308	packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
	309	buffer_free(&buf);
	310	return;
8efc0c15	311	}
8efc0c15	312
5260325f	313	/*
	314	* Decodes terminal modes for the terminal referenced by fd in a portable
	315	* manner from a packet being read.
	316	*/
6ae2364d	317	void
5260325f	318	tty_parse_modes(int fd, int *n_bytes_ptr)
8efc0c15	319	{
5260325f	320	struct termios tio;
	321	int opcode, baud;
	322	int n_bytes = 0;
	323	int failure = 0;
30dcc918	324	u_int (*get_arg)(void);
	325	int arg, arg_size;
	326
	327	if (compat20) {
	328	*n_bytes_ptr = packet_get_int();
	329	debug2("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
	330	if (*n_bytes_ptr == 0)
	331	return;
	332	get_arg = packet_get_int;
	333	arg_size = 4;
	334	} else {
	335	get_arg = packet_get_char;
	336	arg_size = 1;
	337	}
5260325f	338
	339	/*
	340	* Get old attributes for the terminal. We will modify these
	341	* flags. I am hoping that if there are any machine-specific
	342	* modes, they will initially have reasonable values.
	343	*/
30dcc918	344	if (tcgetattr(fd, &tio) == -1) {
30dcc918	345	log("tcgetattr: %.100s", strerror(errno));
5260325f	346	failure = -1;
30dcc918	347	}
5260325f	348
	349	for (;;) {
	350	n_bytes += 1;
	351	opcode = packet_get_char();
	352	switch (opcode) {
	353	case TTY_OP_END:
	354	goto set;
	355
30dcc918	356	/* XXX: future conflict possible */
	357	case TTY_OP_ISPEED_PROTO1:
	358	case TTY_OP_ISPEED_PROTO2:
5260325f	359	n_bytes += 4;
5260325f	360	baud = packet_get_int();
30dcc918	361	debug2("tty_parse_modes: ispeed %d", baud);
30dcc918	362	if (failure != -1 && cfsetispeed(&tio, baud_to_speed(baud)) == -1)
5260325f	363	error("cfsetispeed failed for %d", baud);
	364	break;
	365
30dcc918	366	/* XXX: future conflict possible */
	367	case TTY_OP_OSPEED_PROTO1:
	368	case TTY_OP_OSPEED_PROTO2:
5260325f	369	n_bytes += 4;
5260325f	370	baud = packet_get_int();
30dcc918	371	debug2("tty_parse_modes: ospeed %d", baud);
30dcc918	372	if (failure != -1 && cfsetospeed(&tio, baud_to_speed(baud)) == -1)
5260325f	373	error("cfsetospeed failed for %d", baud);
5260325f	374	break;
8efc0c15	375
30dcc918	376	#define TTYCHAR(NAME, OP) \
	377	case OP: \
	378	n_bytes += arg_size; \
	379	tio.c_cc[NAME] = get_arg(); \
	380	debug2("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
8efc0c15	381	break;
30dcc918	382	#define TTYMODE(NAME, FIELD, OP) \
	383	case OP: \
	384	n_bytes += arg_size; \
	385	if ((arg = get_arg())) \
	386	tio.FIELD \|= NAME; \
	387	else \
	388	tio.FIELD &= ~NAME; \
	389	debug2("tty_parse_modes: %d %d", OP, arg); \
8efc0c15	390	break;
8efc0c15	391
	392	#include "ttymodes.h"
	393
	394	#undef TTYCHAR
	395	#undef TTYMODE
8efc0c15	396
5260325f	397	default:
	398	debug("Ignoring unsupported tty mode opcode %d (0x%x)",
	399	opcode, opcode);
30dcc918	400	if (!compat20) {
	401	/*
	402	* SSH1:
	403	* Opcodes 1 to 127 are defined to have
	404	* a one-byte argument.
	405	* Opcodes 128 to 159 are defined to have
	406	* an integer argument.
	407	*/
	408	if (opcode > 0 && opcode < 128) {
	409	n_bytes += 1;
	410	(void) packet_get_char();
	411	break;
	412	} else if (opcode >= 128 && opcode < 160) {
	413	n_bytes += 4;
	414	(void) packet_get_int();
	415	break;
	416	} else {
	417	/*
	418	* It is a truly undefined opcode (160 to 255).
	419	* We have no idea about its arguments. So we
	420	* must stop parsing. Note that some data may be
	421	* left in the packet; hopefully there is nothing
	422	* more coming after the mode data.
	423	*/
	424	log("parse_tty_modes: unknown opcode %d", opcode);
	425	packet_integrity_check(0, 1, SSH_CMSG_REQUEST_PTY);
	426	goto set;
	427	}
5260325f	428	} else {
5260325f	429	/*
30dcc918	430	* SSH2:
	431	* Opcodes 0 to 159 are defined to have
	432	* a uint32 argument.
	433	* Opcodes 160 to 255 are undefined and
	434	* cause parsing to stop.
5260325f	435	*/
30dcc918	436	if (opcode > 0 && opcode < 160) {
5260325f	437	n_bytes += 4;
	438	(void) packet_get_int();
	439	break;
30dcc918	440	} else {
	441	log("parse_tty_modes: unknown opcode %d", opcode);
	442	goto set;
5260325f	443	}
30dcc918	444	}
8efc0c15	445	}
8efc0c15	446	}
8efc0c15	447
5260325f	448	set:
	449	if (*n_bytes_ptr != n_bytes) {
	450	*n_bytes_ptr = n_bytes;
30dcc918	451	log("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
30dcc918	452	*n_bytes_ptr, n_bytes);
5260325f	453	return; /* Don't process bytes passed */
	454	}
	455	if (failure == -1)
	456	return; /* Packet parsed ok but tty stuff failed */
8efc0c15	457
5260325f	458	/* Set the new modes for the terminal. */
30dcc918	459	if (tcsetattr(fd, TCSANOW, &tio) == -1)
5260325f	460	log("Setting tty modes failed: %.100s", strerror(errno));
5260325f	461	return;
8efc0c15	462	}