[openssh.git] / ttymodes.c

/* $OpenBSD: ttymodes.c,v 1.25 2006/07/22 20:48:23 stevesk Exp $ */
/*
 * 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"

#include <errno.h>
#include <string.h>
#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
00146caa	1	/* $OpenBSD: ttymodes.c,v 1.25 2006/07/22 20:48:23 stevesk Exp $ */
8efc0c15	2	/*
5260325f	3	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	4	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	5	* All rights reserved
bcbf86ec	6	*
	7	* As far as I am concerned, the code I have written for this software
	8	* can be used freely for any purpose. Any derived versions of this
	9	* software must be clearly marked as such, and if the derived work is
	10	* incompatible with the protocol description in the RFC file, it must be
	11	* called by a name other than "ssh" or "Secure Shell".
5260325f	12	*/
8efc0c15	13
30dcc918	14	/*
	15	* SSH2 tty modes support by Kevin Steves.
	16	* Copyright (c) 2001 Kevin Steves. All rights reserved.
	17	*
	18	* Redistribution and use in source and binary forms, with or without
	19	* modification, are permitted provided that the following conditions
	20	* are met:
	21	* 1. Redistributions of source code must retain the above copyright
	22	* notice, this list of conditions and the following disclaimer.
	23	* 2. Redistributions in binary form must reproduce the above copyright
	24	* notice, this list of conditions and the following disclaimer in the
	25	* documentation and/or other materials provided with the distribution.
	26	*
	27	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	28	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	29	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	30	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	31	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	32	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	33	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	34	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	35	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	36	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	37	*/
	38
	39	/*
	40	* Encoding and decoding of terminal modes in a portable way.
	41	* Much of the format is defined in ttymodes.h; it is included multiple times
	42	* into this file with the appropriate macro definitions to generate the
	43	* suitable code.
	44	*/
	45
8efc0c15	46	#include "includes.h"
1d3e026f	47
028094f4	48	#include <errno.h>
00146caa	49	#include <string.h>
1d3e026f	50	#include <termios.h>
8efc0c15	51
8efc0c15	52	#include "packet.h"
42f11eb2	53	#include "log.h"
42f11eb2	54	#include "ssh1.h"
30dcc918	55	#include "compat.h"
	56	#include "buffer.h"
	57	#include "bufaux.h"
8efc0c15	58
30dcc918	59	#define TTY_OP_END 0
	60	/*
	61	* uint32 (u_int) follows speed in SSH1 and SSH2
	62	*/
	63	#define TTY_OP_ISPEED_PROTO1 192
	64	#define TTY_OP_OSPEED_PROTO1 193
	65	#define TTY_OP_ISPEED_PROTO2 128
	66	#define TTY_OP_OSPEED_PROTO2 129
8efc0c15	67
5260325f	68	/*
	69	* Converts POSIX speed_t to a baud rate. The values of the
	70	* constants for speed_t are not themselves portable.
	71	*/
6ae2364d	72	static int
5260325f	73	speed_to_baud(speed_t speed)
8efc0c15	74	{
5260325f	75	switch (speed) {
	76	case B0:
	77	return 0;
	78	case B50:
	79	return 50;
	80	case B75:
	81	return 75;
	82	case B110:
	83	return 110;
	84	case B134:
	85	return 134;
	86	case B150:
	87	return 150;
	88	case B200:
	89	return 200;
	90	case B300:
	91	return 300;
	92	case B600:
	93	return 600;
	94	case B1200:
	95	return 1200;
	96	case B1800:
	97	return 1800;
	98	case B2400:
	99	return 2400;
	100	case B4800:
	101	return 4800;
	102	case B9600:
	103	return 9600;
8efc0c15	104
8efc0c15	105	#ifdef B19200
5260325f	106	case B19200:
5260325f	107	return 19200;
8efc0c15	108	#else /* B19200 */
8efc0c15	109	#ifdef EXTA
5260325f	110	case EXTA:
5260325f	111	return 19200;
8efc0c15	112	#endif /* EXTA */
	113	#endif /* B19200 */
	114
	115	#ifdef B38400
5260325f	116	case B38400:
5260325f	117	return 38400;
8efc0c15	118	#else /* B38400 */
8efc0c15	119	#ifdef EXTB
5260325f	120	case EXTB:
5260325f	121	return 38400;
8efc0c15	122	#endif /* EXTB */
	123	#endif /* B38400 */
	124
	125	#ifdef B7200
5260325f	126	case B7200:
5260325f	127	return 7200;
8efc0c15	128	#endif /* B7200 */
8efc0c15	129	#ifdef B14400
5260325f	130	case B14400:
5260325f	131	return 14400;
8efc0c15	132	#endif /* B14400 */
8efc0c15	133	#ifdef B28800
5260325f	134	case B28800:
5260325f	135	return 28800;
8efc0c15	136	#endif /* B28800 */
8efc0c15	137	#ifdef B57600
5260325f	138	case B57600:
5260325f	139	return 57600;
8efc0c15	140	#endif /* B57600 */
8efc0c15	141	#ifdef B76800
5260325f	142	case B76800:
5260325f	143	return 76800;
8efc0c15	144	#endif /* B76800 */
8efc0c15	145	#ifdef B115200
5260325f	146	case B115200:
5260325f	147	return 115200;
8efc0c15	148	#endif /* B115200 */
8efc0c15	149	#ifdef B230400
5260325f	150	case B230400:
5260325f	151	return 230400;
8efc0c15	152	#endif /* B230400 */
5260325f	153	default:
	154	return 9600;
	155	}
8efc0c15	156	}
8efc0c15	157
5260325f	158	/*
	159	* Converts a numeric baud rate to a POSIX speed_t.
	160	*/
6ae2364d	161	static speed_t
5260325f	162	baud_to_speed(int baud)
8efc0c15	163	{
5260325f	164	switch (baud) {
30dcc918	165	case 0:
5260325f	166	return B0;
	167	case 50:
	168	return B50;
	169	case 75:
	170	return B75;
	171	case 110:
	172	return B110;
	173	case 134:
	174	return B134;
	175	case 150:
	176	return B150;
	177	case 200:
	178	return B200;
	179	case 300:
	180	return B300;
	181	case 600:
	182	return B600;
	183	case 1200:
	184	return B1200;
	185	case 1800:
	186	return B1800;
	187	case 2400:
	188	return B2400;
	189	case 4800:
	190	return B4800;
	191	case 9600:
	192	return B9600;
8efc0c15	193
8efc0c15	194	#ifdef B19200
5260325f	195	case 19200:
5260325f	196	return B19200;
8efc0c15	197	#else /* B19200 */
8efc0c15	198	#ifdef EXTA
5260325f	199	case 19200:
5260325f	200	return EXTA;
8efc0c15	201	#endif /* EXTA */
	202	#endif /* B19200 */
	203
	204	#ifdef B38400
5260325f	205	case 38400:
5260325f	206	return B38400;
8efc0c15	207	#else /* B38400 */
8efc0c15	208	#ifdef EXTB
5260325f	209	case 38400:
5260325f	210	return EXTB;
8efc0c15	211	#endif /* EXTB */
	212	#endif /* B38400 */
	213
	214	#ifdef B7200
5260325f	215	case 7200:
5260325f	216	return B7200;
8efc0c15	217	#endif /* B7200 */
8efc0c15	218	#ifdef B14400
5260325f	219	case 14400:
5260325f	220	return B14400;
8efc0c15	221	#endif /* B14400 */
8efc0c15	222	#ifdef B28800
5260325f	223	case 28800:
5260325f	224	return B28800;
8efc0c15	225	#endif /* B28800 */
8efc0c15	226	#ifdef B57600
5260325f	227	case 57600:
5260325f	228	return B57600;
8efc0c15	229	#endif /* B57600 */
8efc0c15	230	#ifdef B76800
5260325f	231	case 76800:
5260325f	232	return B76800;
8efc0c15	233	#endif /* B76800 */
8efc0c15	234	#ifdef B115200
5260325f	235	case 115200:
5260325f	236	return B115200;
8efc0c15	237	#endif /* B115200 */
8efc0c15	238	#ifdef B230400
5260325f	239	case 230400:
5260325f	240	return B230400;
8efc0c15	241	#endif /* B230400 */
5260325f	242	default:
	243	return B9600;
	244	}
8efc0c15	245	}
8efc0c15	246
879abf01	247	/*
	248	* Encode a special character into SSH line format.
	249	*/
	250	static u_int
	251	special_char_encode(cc_t c)
	252	{
	253	#ifdef _POSIX_VDISABLE
	254	if (c == _POSIX_VDISABLE)
	255	return 255;
	256	#endif /* _POSIX_VDISABLE */
	257	return c;
	258	}
	259
	260	/*
	261	* Decode a special character from SSH line format.
	262	*/
	263	static cc_t
	264	special_char_decode(u_int c)
	265	{
	266	#ifdef _POSIX_VDISABLE
	267	if (c == 255)
	268	return _POSIX_VDISABLE;
	269	#endif /* _POSIX_VDISABLE */
	270	return c;
	271	}
	272
5260325f	273	/*
5260325f	274	* Encodes terminal modes for the terminal referenced by fd
30dcc918	275	* or tiop in a portable manner, and appends the modes to a packet
5260325f	276	* being constructed.
5260325f	277	*/
6ae2364d	278	void
30dcc918	279	tty_make_modes(int fd, struct termios *tiop)
8efc0c15	280	{
5260325f	281	struct termios tio;
5260325f	282	int baud;
30dcc918	283	Buffer buf;
	284	int tty_op_ospeed, tty_op_ispeed;
	285	void (put_arg)(Buffer , u_int);
5260325f	286
30dcc918	287	buffer_init(&buf);
	288	if (compat20) {
	289	tty_op_ospeed = TTY_OP_OSPEED_PROTO2;
	290	tty_op_ispeed = TTY_OP_ISPEED_PROTO2;
	291	put_arg = buffer_put_int;
	292	} else {
	293	tty_op_ospeed = TTY_OP_OSPEED_PROTO1;
	294	tty_op_ispeed = TTY_OP_ISPEED_PROTO1;
	295	put_arg = (void ()(Buffer , u_int)) buffer_put_char;
5260325f	296	}
30dcc918	297
	298	if (tiop == NULL) {
	299	if (tcgetattr(fd, &tio) == -1) {
bbe88b6d	300	logit("tcgetattr: %.100s", strerror(errno));
30dcc918	301	goto end;
	302	}
	303	} else
	304	tio = *tiop;
	305
5260325f	306	/* Store input and output baud rates. */
5260325f	307	baud = speed_to_baud(cfgetospeed(&tio));
b4e7177c	308	debug3("tty_make_modes: ospeed %d", baud);
30dcc918	309	buffer_put_char(&buf, tty_op_ospeed);
30dcc918	310	buffer_put_int(&buf, baud);
5260325f	311	baud = speed_to_baud(cfgetispeed(&tio));
b4e7177c	312	debug3("tty_make_modes: ispeed %d", baud);
30dcc918	313	buffer_put_char(&buf, tty_op_ispeed);
30dcc918	314	buffer_put_int(&buf, baud);
5260325f	315
5260325f	316	/* Store values of mode flags. */
8efc0c15	317	#define TTYCHAR(NAME, OP) \
b4e7177c	318	debug3("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
30dcc918	319	buffer_put_char(&buf, OP); \
879abf01	320	put_arg(&buf, special_char_encode(tio.c_cc[NAME]));
30dcc918	321
8efc0c15	322	#define TTYMODE(NAME, FIELD, OP) \
b4e7177c	323	debug3("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
30dcc918	324	buffer_put_char(&buf, OP); \
30dcc918	325	put_arg(&buf, ((tio.FIELD & NAME) != 0));
8efc0c15	326
	327	#include "ttymodes.h"
	328
	329	#undef TTYCHAR
	330	#undef TTYMODE
8efc0c15	331
30dcc918	332	end:
5260325f	333	/* Mark end of mode data. */
30dcc918	334	buffer_put_char(&buf, TTY_OP_END);
	335	if (compat20)
	336	packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
	337	else
	338	packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
	339	buffer_free(&buf);
8efc0c15	340	}
8efc0c15	341
5260325f	342	/*
	343	* Decodes terminal modes for the terminal referenced by fd in a portable
	344	* manner from a packet being read.
	345	*/
6ae2364d	346	void
5260325f	347	tty_parse_modes(int fd, int *n_bytes_ptr)
8efc0c15	348	{
5260325f	349	struct termios tio;
	350	int opcode, baud;
	351	int n_bytes = 0;
	352	int failure = 0;
30dcc918	353	u_int (*get_arg)(void);
	354	int arg, arg_size;
	355
	356	if (compat20) {
	357	*n_bytes_ptr = packet_get_int();
b4e7177c	358	debug3("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
30dcc918	359	if (*n_bytes_ptr == 0)
	360	return;
	361	get_arg = packet_get_int;
	362	arg_size = 4;
	363	} else {
	364	get_arg = packet_get_char;
	365	arg_size = 1;
	366	}
5260325f	367
	368	/*
	369	* Get old attributes for the terminal. We will modify these
	370	* flags. I am hoping that if there are any machine-specific
	371	* modes, they will initially have reasonable values.
	372	*/
30dcc918	373	if (tcgetattr(fd, &tio) == -1) {
bbe88b6d	374	logit("tcgetattr: %.100s", strerror(errno));
5260325f	375	failure = -1;
30dcc918	376	}
5260325f	377
	378	for (;;) {
	379	n_bytes += 1;
	380	opcode = packet_get_char();
	381	switch (opcode) {
	382	case TTY_OP_END:
	383	goto set;
	384
30dcc918	385	/* XXX: future conflict possible */
	386	case TTY_OP_ISPEED_PROTO1:
	387	case TTY_OP_ISPEED_PROTO2:
5260325f	388	n_bytes += 4;
5260325f	389	baud = packet_get_int();
b4e7177c	390	debug3("tty_parse_modes: ispeed %d", baud);
1cec12db	391	if (failure != -1 &&
1cec12db	392	cfsetispeed(&tio, baud_to_speed(baud)) == -1)
5260325f	393	error("cfsetispeed failed for %d", baud);
	394	break;
	395
30dcc918	396	/* XXX: future conflict possible */
	397	case TTY_OP_OSPEED_PROTO1:
	398	case TTY_OP_OSPEED_PROTO2:
5260325f	399	n_bytes += 4;
5260325f	400	baud = packet_get_int();
b4e7177c	401	debug3("tty_parse_modes: ospeed %d", baud);
1cec12db	402	if (failure != -1 &&
1cec12db	403	cfsetospeed(&tio, baud_to_speed(baud)) == -1)
5260325f	404	error("cfsetospeed failed for %d", baud);
5260325f	405	break;
8efc0c15	406
30dcc918	407	#define TTYCHAR(NAME, OP) \
	408	case OP: \
	409	n_bytes += arg_size; \
879abf01	410	tio.c_cc[NAME] = special_char_decode(get_arg()); \
b4e7177c	411	debug3("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
8efc0c15	412	break;
30dcc918	413	#define TTYMODE(NAME, FIELD, OP) \
	414	case OP: \
	415	n_bytes += arg_size; \
	416	if ((arg = get_arg())) \
	417	tio.FIELD \|= NAME; \
	418	else \
	419	tio.FIELD &= ~NAME; \
b4e7177c	420	debug3("tty_parse_modes: %d %d", OP, arg); \
8efc0c15	421	break;
8efc0c15	422
	423	#include "ttymodes.h"
	424
	425	#undef TTYCHAR
	426	#undef TTYMODE
8efc0c15	427
5260325f	428	default:
5260325f	429	debug("Ignoring unsupported tty mode opcode %d (0x%x)",
184eed6a	430	opcode, opcode);
30dcc918	431	if (!compat20) {
	432	/*
	433	* SSH1:
	434	* Opcodes 1 to 127 are defined to have
	435	* a one-byte argument.
762715ce	436	* Opcodes 128 to 159 are defined to have
	437	* an integer argument.
	438	*/
30dcc918	439	if (opcode > 0 && opcode < 128) {
	440	n_bytes += 1;
	441	(void) packet_get_char();
	442	break;
	443	} else if (opcode >= 128 && opcode < 160) {
762715ce	444	n_bytes += 4;
	445	(void) packet_get_int();
	446	break;
30dcc918	447	} else {
	448	/*
	449	* It is a truly undefined opcode (160 to 255).
	450	* We have no idea about its arguments. So we
1cec12db	451	* must stop parsing. Note that some data
	452	* may be left in the packet; hopefully there
	453	* is nothing more coming after the mode data.
30dcc918	454	*/
1cec12db	455	logit("parse_tty_modes: unknown opcode %d",
1cec12db	456	opcode);
30dcc918	457	goto set;
762715ce	458	}
5260325f	459	} else {
5260325f	460	/*
30dcc918	461	* SSH2:
e4664c3e	462	* Opcodes 1 to 159 are defined to have
30dcc918	463	* a uint32 argument.
	464	* Opcodes 160 to 255 are undefined and
	465	* cause parsing to stop.
5260325f	466	*/
30dcc918	467	if (opcode > 0 && opcode < 160) {
5260325f	468	n_bytes += 4;
	469	(void) packet_get_int();
	470	break;
30dcc918	471	} else {
1cec12db	472	logit("parse_tty_modes: unknown opcode %d",
1cec12db	473	opcode);
30dcc918	474	goto set;
5260325f	475	}
762715ce	476	}
8efc0c15	477	}
8efc0c15	478	}
8efc0c15	479
5260325f	480	set:
	481	if (*n_bytes_ptr != n_bytes) {
	482	*n_bytes_ptr = n_bytes;
bbe88b6d	483	logit("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
30dcc918	484	*n_bytes_ptr, n_bytes);
5260325f	485	return; /* Don't process bytes passed */
	486	}
	487	if (failure == -1)
e4664c3e	488	return; /* Packet parsed ok but tcgetattr() failed */
8efc0c15	489
5260325f	490	/* Set the new modes for the terminal. */
30dcc918	491	if (tcsetattr(fd, TCSANOW, &tio) == -1)
bbe88b6d	492	logit("Setting tty modes failed: %.100s", strerror(errno));
8efc0c15	493	}