[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 1.20 2006/02/07 01:42:00 stevesk Exp $");

#include <termios.h>

#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;
	}
}

/*
 * Encode a special character into SSH line format.
 */
static u_int
special_char_encode(cc_t c)
{
#ifdef _POSIX_VDISABLE
	if (c == _POSIX_VDISABLE)
		return 255;
#endif /* _POSIX_VDISABLE */
	return c;
}

/*
 * Decode a special character from SSH line format.
 */
static cc_t
special_char_decode(u_int c)
{
#ifdef _POSIX_VDISABLE
	if (c == 255)
		return _POSIX_VDISABLE;
#endif /* _POSIX_VDISABLE */
	return c;
}

/*
 * 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) {
			logit("tcgetattr: %.100s", strerror(errno));
			goto end;
		}
	} else
		tio = *tiop;

	/* Store input and output baud rates. */
	baud = speed_to_baud(cfgetospeed(&tio));
	debug3("tty_make_modes: ospeed %d", baud);
	buffer_put_char(&buf, tty_op_ospeed);
	buffer_put_int(&buf, baud);
	baud = speed_to_baud(cfgetispeed(&tio));
	debug3("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) \
	debug3("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
	buffer_put_char(&buf, OP); \
	put_arg(&buf, special_char_encode(tio.c_cc[NAME]));

#define TTYMODE(NAME, FIELD, OP) \
	debug3("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);
}

/*
 * 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();
		debug3("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) {
		logit("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();
			debug3("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();
			debug3("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] = special_char_decode(get_arg()); \
	  debug3("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;	\
	  debug3("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.
					 */
					logit("parse_tty_modes: unknown opcode %d", opcode);
					goto set;
				}
			} else {
				/*
				 * SSH2:
				 * Opcodes 1 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 {
					logit("parse_tty_modes: unknown opcode %d", opcode);
					goto set;
				}
			}
		}
	}

set:
	if (*n_bytes_ptr != n_bytes) {
		*n_bytes_ptr = n_bytes;
		logit("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 tcgetattr() failed */

	/* Set the new modes for the terminal. */
	if (tcsetattr(fd, TCSANOW, &tio) == -1)
		logit("Setting tty modes failed: %.100s", strerror(errno));
}
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"
1d3e026f	46	RCSID("$OpenBSD: ttymodes.c,v 1.20 2006/02/07 01:42:00 stevesk Exp $");
	47
	48	#include <termios.h>
8efc0c15	49
8efc0c15	50	#include "packet.h"
42f11eb2	51	#include "log.h"
42f11eb2	52	#include "ssh1.h"
30dcc918	53	#include "compat.h"
	54	#include "buffer.h"
	55	#include "bufaux.h"
8efc0c15	56
30dcc918	57	#define TTY_OP_END 0
	58	/*
	59	* uint32 (u_int) follows speed in SSH1 and SSH2
	60	*/
	61	#define TTY_OP_ISPEED_PROTO1 192
	62	#define TTY_OP_OSPEED_PROTO1 193
	63	#define TTY_OP_ISPEED_PROTO2 128
	64	#define TTY_OP_OSPEED_PROTO2 129
8efc0c15	65
5260325f	66	/*
	67	* Converts POSIX speed_t to a baud rate. The values of the
	68	* constants for speed_t are not themselves portable.
	69	*/
6ae2364d	70	static int
5260325f	71	speed_to_baud(speed_t speed)
8efc0c15	72	{
5260325f	73	switch (speed) {
	74	case B0:
	75	return 0;
	76	case B50:
	77	return 50;
	78	case B75:
	79	return 75;
	80	case B110:
	81	return 110;
	82	case B134:
	83	return 134;
	84	case B150:
	85	return 150;
	86	case B200:
	87	return 200;
	88	case B300:
	89	return 300;
	90	case B600:
	91	return 600;
	92	case B1200:
	93	return 1200;
	94	case B1800:
	95	return 1800;
	96	case B2400:
	97	return 2400;
	98	case B4800:
	99	return 4800;
	100	case B9600:
	101	return 9600;
8efc0c15	102
8efc0c15	103	#ifdef B19200
5260325f	104	case B19200:
5260325f	105	return 19200;
8efc0c15	106	#else /* B19200 */
8efc0c15	107	#ifdef EXTA
5260325f	108	case EXTA:
5260325f	109	return 19200;
8efc0c15	110	#endif /* EXTA */
	111	#endif /* B19200 */
	112
	113	#ifdef B38400
5260325f	114	case B38400:
5260325f	115	return 38400;
8efc0c15	116	#else /* B38400 */
8efc0c15	117	#ifdef EXTB
5260325f	118	case EXTB:
5260325f	119	return 38400;
8efc0c15	120	#endif /* EXTB */
	121	#endif /* B38400 */
	122
	123	#ifdef B7200
5260325f	124	case B7200:
5260325f	125	return 7200;
8efc0c15	126	#endif /* B7200 */
8efc0c15	127	#ifdef B14400
5260325f	128	case B14400:
5260325f	129	return 14400;
8efc0c15	130	#endif /* B14400 */
8efc0c15	131	#ifdef B28800
5260325f	132	case B28800:
5260325f	133	return 28800;
8efc0c15	134	#endif /* B28800 */
8efc0c15	135	#ifdef B57600
5260325f	136	case B57600:
5260325f	137	return 57600;
8efc0c15	138	#endif /* B57600 */
8efc0c15	139	#ifdef B76800
5260325f	140	case B76800:
5260325f	141	return 76800;
8efc0c15	142	#endif /* B76800 */
8efc0c15	143	#ifdef B115200
5260325f	144	case B115200:
5260325f	145	return 115200;
8efc0c15	146	#endif /* B115200 */
8efc0c15	147	#ifdef B230400
5260325f	148	case B230400:
5260325f	149	return 230400;
8efc0c15	150	#endif /* B230400 */
5260325f	151	default:
	152	return 9600;
	153	}
8efc0c15	154	}
8efc0c15	155
5260325f	156	/*
	157	* Converts a numeric baud rate to a POSIX speed_t.
	158	*/
6ae2364d	159	static speed_t
5260325f	160	baud_to_speed(int baud)
8efc0c15	161	{
5260325f	162	switch (baud) {
30dcc918	163	case 0:
5260325f	164	return B0;
	165	case 50:
	166	return B50;
	167	case 75:
	168	return B75;
	169	case 110:
	170	return B110;
	171	case 134:
	172	return B134;
	173	case 150:
	174	return B150;
	175	case 200:
	176	return B200;
	177	case 300:
	178	return B300;
	179	case 600:
	180	return B600;
	181	case 1200:
	182	return B1200;
	183	case 1800:
	184	return B1800;
	185	case 2400:
	186	return B2400;
	187	case 4800:
	188	return B4800;
	189	case 9600:
	190	return B9600;
8efc0c15	191
8efc0c15	192	#ifdef B19200
5260325f	193	case 19200:
5260325f	194	return B19200;
8efc0c15	195	#else /* B19200 */
8efc0c15	196	#ifdef EXTA
5260325f	197	case 19200:
5260325f	198	return EXTA;
8efc0c15	199	#endif /* EXTA */
	200	#endif /* B19200 */
	201
	202	#ifdef B38400
5260325f	203	case 38400:
5260325f	204	return B38400;
8efc0c15	205	#else /* B38400 */
8efc0c15	206	#ifdef EXTB
5260325f	207	case 38400:
5260325f	208	return EXTB;
8efc0c15	209	#endif /* EXTB */
	210	#endif /* B38400 */
	211
	212	#ifdef B7200
5260325f	213	case 7200:
5260325f	214	return B7200;
8efc0c15	215	#endif /* B7200 */
8efc0c15	216	#ifdef B14400
5260325f	217	case 14400:
5260325f	218	return B14400;
8efc0c15	219	#endif /* B14400 */
8efc0c15	220	#ifdef B28800
5260325f	221	case 28800:
5260325f	222	return B28800;
8efc0c15	223	#endif /* B28800 */
8efc0c15	224	#ifdef B57600
5260325f	225	case 57600:
5260325f	226	return B57600;
8efc0c15	227	#endif /* B57600 */
8efc0c15	228	#ifdef B76800
5260325f	229	case 76800:
5260325f	230	return B76800;
8efc0c15	231	#endif /* B76800 */
8efc0c15	232	#ifdef B115200
5260325f	233	case 115200:
5260325f	234	return B115200;
8efc0c15	235	#endif /* B115200 */
8efc0c15	236	#ifdef B230400
5260325f	237	case 230400:
5260325f	238	return B230400;
8efc0c15	239	#endif /* B230400 */
5260325f	240	default:
	241	return B9600;
	242	}
8efc0c15	243	}
8efc0c15	244
879abf01	245	/*
	246	* Encode a special character into SSH line format.
	247	*/
	248	static u_int
	249	special_char_encode(cc_t c)
	250	{
	251	#ifdef _POSIX_VDISABLE
	252	if (c == _POSIX_VDISABLE)
	253	return 255;
	254	#endif /* _POSIX_VDISABLE */
	255	return c;
	256	}
	257
	258	/*
	259	* Decode a special character from SSH line format.
	260	*/
	261	static cc_t
	262	special_char_decode(u_int c)
	263	{
	264	#ifdef _POSIX_VDISABLE
	265	if (c == 255)
	266	return _POSIX_VDISABLE;
	267	#endif /* _POSIX_VDISABLE */
	268	return c;
	269	}
	270
5260325f	271	/*
5260325f	272	* Encodes terminal modes for the terminal referenced by fd
30dcc918	273	* or tiop in a portable manner, and appends the modes to a packet
5260325f	274	* being constructed.
5260325f	275	*/
6ae2364d	276	void
30dcc918	277	tty_make_modes(int fd, struct termios *tiop)
8efc0c15	278	{
5260325f	279	struct termios tio;
5260325f	280	int baud;
30dcc918	281	Buffer buf;
	282	int tty_op_ospeed, tty_op_ispeed;
	283	void (put_arg)(Buffer , u_int);
5260325f	284
30dcc918	285	buffer_init(&buf);
	286	if (compat20) {
	287	tty_op_ospeed = TTY_OP_OSPEED_PROTO2;
	288	tty_op_ispeed = TTY_OP_ISPEED_PROTO2;
	289	put_arg = buffer_put_int;
	290	} else {
	291	tty_op_ospeed = TTY_OP_OSPEED_PROTO1;
	292	tty_op_ispeed = TTY_OP_ISPEED_PROTO1;
	293	put_arg = (void ()(Buffer , u_int)) buffer_put_char;
5260325f	294	}
30dcc918	295
	296	if (tiop == NULL) {
	297	if (tcgetattr(fd, &tio) == -1) {
bbe88b6d	298	logit("tcgetattr: %.100s", strerror(errno));
30dcc918	299	goto end;
	300	}
	301	} else
	302	tio = *tiop;
	303
5260325f	304	/* Store input and output baud rates. */
5260325f	305	baud = speed_to_baud(cfgetospeed(&tio));
b4e7177c	306	debug3("tty_make_modes: ospeed %d", baud);
30dcc918	307	buffer_put_char(&buf, tty_op_ospeed);
30dcc918	308	buffer_put_int(&buf, baud);
5260325f	309	baud = speed_to_baud(cfgetispeed(&tio));
b4e7177c	310	debug3("tty_make_modes: ispeed %d", baud);
30dcc918	311	buffer_put_char(&buf, tty_op_ispeed);
30dcc918	312	buffer_put_int(&buf, baud);
5260325f	313
5260325f	314	/* Store values of mode flags. */
8efc0c15	315	#define TTYCHAR(NAME, OP) \
b4e7177c	316	debug3("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
30dcc918	317	buffer_put_char(&buf, OP); \
879abf01	318	put_arg(&buf, special_char_encode(tio.c_cc[NAME]));
30dcc918	319
8efc0c15	320	#define TTYMODE(NAME, FIELD, OP) \
b4e7177c	321	debug3("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
30dcc918	322	buffer_put_char(&buf, OP); \
30dcc918	323	put_arg(&buf, ((tio.FIELD & NAME) != 0));
8efc0c15	324
	325	#include "ttymodes.h"
	326
	327	#undef TTYCHAR
	328	#undef TTYMODE
8efc0c15	329
30dcc918	330	end:
5260325f	331	/* Mark end of mode data. */
30dcc918	332	buffer_put_char(&buf, TTY_OP_END);
	333	if (compat20)
	334	packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
	335	else
	336	packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
	337	buffer_free(&buf);
8efc0c15	338	}
8efc0c15	339
5260325f	340	/*
	341	* Decodes terminal modes for the terminal referenced by fd in a portable
	342	* manner from a packet being read.
	343	*/
6ae2364d	344	void
5260325f	345	tty_parse_modes(int fd, int *n_bytes_ptr)
8efc0c15	346	{
5260325f	347	struct termios tio;
	348	int opcode, baud;
	349	int n_bytes = 0;
	350	int failure = 0;
30dcc918	351	u_int (*get_arg)(void);
	352	int arg, arg_size;
	353
	354	if (compat20) {
	355	*n_bytes_ptr = packet_get_int();
b4e7177c	356	debug3("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
30dcc918	357	if (*n_bytes_ptr == 0)
	358	return;
	359	get_arg = packet_get_int;
	360	arg_size = 4;
	361	} else {
	362	get_arg = packet_get_char;
	363	arg_size = 1;
	364	}
5260325f	365
	366	/*
	367	* Get old attributes for the terminal. We will modify these
	368	* flags. I am hoping that if there are any machine-specific
	369	* modes, they will initially have reasonable values.
	370	*/
30dcc918	371	if (tcgetattr(fd, &tio) == -1) {
bbe88b6d	372	logit("tcgetattr: %.100s", strerror(errno));
5260325f	373	failure = -1;
30dcc918	374	}
5260325f	375
	376	for (;;) {
	377	n_bytes += 1;
	378	opcode = packet_get_char();
	379	switch (opcode) {
	380	case TTY_OP_END:
	381	goto set;
	382
30dcc918	383	/* XXX: future conflict possible */
	384	case TTY_OP_ISPEED_PROTO1:
	385	case TTY_OP_ISPEED_PROTO2:
5260325f	386	n_bytes += 4;
5260325f	387	baud = packet_get_int();
b4e7177c	388	debug3("tty_parse_modes: ispeed %d", baud);
30dcc918	389	if (failure != -1 && cfsetispeed(&tio, baud_to_speed(baud)) == -1)
5260325f	390	error("cfsetispeed failed for %d", baud);
	391	break;
	392
30dcc918	393	/* XXX: future conflict possible */
	394	case TTY_OP_OSPEED_PROTO1:
	395	case TTY_OP_OSPEED_PROTO2:
5260325f	396	n_bytes += 4;
5260325f	397	baud = packet_get_int();
b4e7177c	398	debug3("tty_parse_modes: ospeed %d", baud);
30dcc918	399	if (failure != -1 && cfsetospeed(&tio, baud_to_speed(baud)) == -1)
5260325f	400	error("cfsetospeed failed for %d", baud);
5260325f	401	break;
8efc0c15	402
30dcc918	403	#define TTYCHAR(NAME, OP) \
	404	case OP: \
	405	n_bytes += arg_size; \
879abf01	406	tio.c_cc[NAME] = special_char_decode(get_arg()); \
b4e7177c	407	debug3("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
8efc0c15	408	break;
30dcc918	409	#define TTYMODE(NAME, FIELD, OP) \
	410	case OP: \
	411	n_bytes += arg_size; \
	412	if ((arg = get_arg())) \
	413	tio.FIELD \|= NAME; \
	414	else \
	415	tio.FIELD &= ~NAME; \
b4e7177c	416	debug3("tty_parse_modes: %d %d", OP, arg); \
8efc0c15	417	break;
8efc0c15	418
	419	#include "ttymodes.h"
	420
	421	#undef TTYCHAR
	422	#undef TTYMODE
8efc0c15	423
5260325f	424	default:
5260325f	425	debug("Ignoring unsupported tty mode opcode %d (0x%x)",
184eed6a	426	opcode, opcode);
30dcc918	427	if (!compat20) {
	428	/*
	429	* SSH1:
	430	* Opcodes 1 to 127 are defined to have
	431	* a one-byte argument.
762715ce	432	* Opcodes 128 to 159 are defined to have
	433	* an integer argument.
	434	*/
30dcc918	435	if (opcode > 0 && opcode < 128) {
	436	n_bytes += 1;
	437	(void) packet_get_char();
	438	break;
	439	} else if (opcode >= 128 && opcode < 160) {
762715ce	440	n_bytes += 4;
	441	(void) packet_get_int();
	442	break;
30dcc918	443	} else {
	444	/*
	445	* It is a truly undefined opcode (160 to 255).
	446	* We have no idea about its arguments. So we
	447	* must stop parsing. Note that some data may be
	448	* left in the packet; hopefully there is nothing
	449	* more coming after the mode data.
	450	*/
bbe88b6d	451	logit("parse_tty_modes: unknown opcode %d", opcode);
30dcc918	452	goto set;
762715ce	453	}
5260325f	454	} else {
5260325f	455	/*
30dcc918	456	* SSH2:
e4664c3e	457	* Opcodes 1 to 159 are defined to have
30dcc918	458	* a uint32 argument.
	459	* Opcodes 160 to 255 are undefined and
	460	* cause parsing to stop.
5260325f	461	*/
30dcc918	462	if (opcode > 0 && opcode < 160) {
5260325f	463	n_bytes += 4;
	464	(void) packet_get_int();
	465	break;
30dcc918	466	} else {
bbe88b6d	467	logit("parse_tty_modes: unknown opcode %d", opcode);
30dcc918	468	goto set;
5260325f	469	}
762715ce	470	}
8efc0c15	471	}
8efc0c15	472	}
8efc0c15	473
5260325f	474	set:
	475	if (*n_bytes_ptr != n_bytes) {
	476	*n_bytes_ptr = n_bytes;
bbe88b6d	477	logit("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
30dcc918	478	*n_bytes_ptr, n_bytes);
5260325f	479	return; /* Don't process bytes passed */
	480	}
	481	if (failure == -1)
e4664c3e	482	return; /* Packet parsed ok but tcgetattr() failed */
8efc0c15	483
5260325f	484	/* Set the new modes for the terminal. */
30dcc918	485	if (tcsetattr(fd, TCSANOW, &tio) == -1)
bbe88b6d	486	logit("Setting tty modes failed: %.100s", strerror(errno));
8efc0c15	487	}