[openssh.git] / ttymodes.c

/* $OpenBSD: ttymodes.c,v 1.24 2006/07/11 20:07:25 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 <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
028094f4	1	/* $OpenBSD: ttymodes.c,v 1.24 2006/07/11 20:07:25 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>
1d3e026f	49	#include <termios.h>
8efc0c15	50
8efc0c15	51	#include "packet.h"
42f11eb2	52	#include "log.h"
42f11eb2	53	#include "ssh1.h"
30dcc918	54	#include "compat.h"
	55	#include "buffer.h"
	56	#include "bufaux.h"
8efc0c15	57
30dcc918	58	#define TTY_OP_END 0
	59	/*
	60	* uint32 (u_int) follows speed in SSH1 and SSH2
	61	*/
	62	#define TTY_OP_ISPEED_PROTO1 192
	63	#define TTY_OP_OSPEED_PROTO1 193
	64	#define TTY_OP_ISPEED_PROTO2 128
	65	#define TTY_OP_OSPEED_PROTO2 129
8efc0c15	66
5260325f	67	/*
	68	* Converts POSIX speed_t to a baud rate. The values of the
	69	* constants for speed_t are not themselves portable.
	70	*/
6ae2364d	71	static int
5260325f	72	speed_to_baud(speed_t speed)
8efc0c15	73	{
5260325f	74	switch (speed) {
	75	case B0:
	76	return 0;
	77	case B50:
	78	return 50;
	79	case B75:
	80	return 75;
	81	case B110:
	82	return 110;
	83	case B134:
	84	return 134;
	85	case B150:
	86	return 150;
	87	case B200:
	88	return 200;
	89	case B300:
	90	return 300;
	91	case B600:
	92	return 600;
	93	case B1200:
	94	return 1200;
	95	case B1800:
	96	return 1800;
	97	case B2400:
	98	return 2400;
	99	case B4800:
	100	return 4800;
	101	case B9600:
	102	return 9600;
8efc0c15	103
8efc0c15	104	#ifdef B19200
5260325f	105	case B19200:
5260325f	106	return 19200;
8efc0c15	107	#else /* B19200 */
8efc0c15	108	#ifdef EXTA
5260325f	109	case EXTA:
5260325f	110	return 19200;
8efc0c15	111	#endif /* EXTA */
	112	#endif /* B19200 */
	113
	114	#ifdef B38400
5260325f	115	case B38400:
5260325f	116	return 38400;
8efc0c15	117	#else /* B38400 */
8efc0c15	118	#ifdef EXTB
5260325f	119	case EXTB:
5260325f	120	return 38400;
8efc0c15	121	#endif /* EXTB */
	122	#endif /* B38400 */
	123
	124	#ifdef B7200
5260325f	125	case B7200:
5260325f	126	return 7200;
8efc0c15	127	#endif /* B7200 */
8efc0c15	128	#ifdef B14400
5260325f	129	case B14400:
5260325f	130	return 14400;
8efc0c15	131	#endif /* B14400 */
8efc0c15	132	#ifdef B28800
5260325f	133	case B28800:
5260325f	134	return 28800;
8efc0c15	135	#endif /* B28800 */
8efc0c15	136	#ifdef B57600
5260325f	137	case B57600:
5260325f	138	return 57600;
8efc0c15	139	#endif /* B57600 */
8efc0c15	140	#ifdef B76800
5260325f	141	case B76800:
5260325f	142	return 76800;
8efc0c15	143	#endif /* B76800 */
8efc0c15	144	#ifdef B115200
5260325f	145	case B115200:
5260325f	146	return 115200;
8efc0c15	147	#endif /* B115200 */
8efc0c15	148	#ifdef B230400
5260325f	149	case B230400:
5260325f	150	return 230400;
8efc0c15	151	#endif /* B230400 */
5260325f	152	default:
	153	return 9600;
	154	}
8efc0c15	155	}
8efc0c15	156
5260325f	157	/*
	158	* Converts a numeric baud rate to a POSIX speed_t.
	159	*/
6ae2364d	160	static speed_t
5260325f	161	baud_to_speed(int baud)
8efc0c15	162	{
5260325f	163	switch (baud) {
30dcc918	164	case 0:
5260325f	165	return B0;
	166	case 50:
	167	return B50;
	168	case 75:
	169	return B75;
	170	case 110:
	171	return B110;
	172	case 134:
	173	return B134;
	174	case 150:
	175	return B150;
	176	case 200:
	177	return B200;
	178	case 300:
	179	return B300;
	180	case 600:
	181	return B600;
	182	case 1200:
	183	return B1200;
	184	case 1800:
	185	return B1800;
	186	case 2400:
	187	return B2400;
	188	case 4800:
	189	return B4800;
	190	case 9600:
	191	return B9600;
8efc0c15	192
8efc0c15	193	#ifdef B19200
5260325f	194	case 19200:
5260325f	195	return B19200;
8efc0c15	196	#else /* B19200 */
8efc0c15	197	#ifdef EXTA
5260325f	198	case 19200:
5260325f	199	return EXTA;
8efc0c15	200	#endif /* EXTA */
	201	#endif /* B19200 */
	202
	203	#ifdef B38400
5260325f	204	case 38400:
5260325f	205	return B38400;
8efc0c15	206	#else /* B38400 */
8efc0c15	207	#ifdef EXTB
5260325f	208	case 38400:
5260325f	209	return EXTB;
8efc0c15	210	#endif /* EXTB */
	211	#endif /* B38400 */
	212
	213	#ifdef B7200
5260325f	214	case 7200:
5260325f	215	return B7200;
8efc0c15	216	#endif /* B7200 */
8efc0c15	217	#ifdef B14400
5260325f	218	case 14400:
5260325f	219	return B14400;
8efc0c15	220	#endif /* B14400 */
8efc0c15	221	#ifdef B28800
5260325f	222	case 28800:
5260325f	223	return B28800;
8efc0c15	224	#endif /* B28800 */
8efc0c15	225	#ifdef B57600
5260325f	226	case 57600:
5260325f	227	return B57600;
8efc0c15	228	#endif /* B57600 */
8efc0c15	229	#ifdef B76800
5260325f	230	case 76800:
5260325f	231	return B76800;
8efc0c15	232	#endif /* B76800 */
8efc0c15	233	#ifdef B115200
5260325f	234	case 115200:
5260325f	235	return B115200;
8efc0c15	236	#endif /* B115200 */
8efc0c15	237	#ifdef B230400
5260325f	238	case 230400:
5260325f	239	return B230400;
8efc0c15	240	#endif /* B230400 */
5260325f	241	default:
	242	return B9600;
	243	}
8efc0c15	244	}
8efc0c15	245
879abf01	246	/*
	247	* Encode a special character into SSH line format.
	248	*/
	249	static u_int
	250	special_char_encode(cc_t c)
	251	{
	252	#ifdef _POSIX_VDISABLE
	253	if (c == _POSIX_VDISABLE)
	254	return 255;
	255	#endif /* _POSIX_VDISABLE */
	256	return c;
	257	}
	258
	259	/*
	260	* Decode a special character from SSH line format.
	261	*/
	262	static cc_t
	263	special_char_decode(u_int c)
	264	{
	265	#ifdef _POSIX_VDISABLE
	266	if (c == 255)
	267	return _POSIX_VDISABLE;
	268	#endif /* _POSIX_VDISABLE */
	269	return c;
	270	}
	271
5260325f	272	/*
5260325f	273	* Encodes terminal modes for the terminal referenced by fd
30dcc918	274	* or tiop in a portable manner, and appends the modes to a packet
5260325f	275	* being constructed.
5260325f	276	*/
6ae2364d	277	void
30dcc918	278	tty_make_modes(int fd, struct termios *tiop)
8efc0c15	279	{
5260325f	280	struct termios tio;
5260325f	281	int baud;
30dcc918	282	Buffer buf;
	283	int tty_op_ospeed, tty_op_ispeed;
	284	void (put_arg)(Buffer , u_int);
5260325f	285
30dcc918	286	buffer_init(&buf);
	287	if (compat20) {
	288	tty_op_ospeed = TTY_OP_OSPEED_PROTO2;
	289	tty_op_ispeed = TTY_OP_ISPEED_PROTO2;
	290	put_arg = buffer_put_int;
	291	} else {
	292	tty_op_ospeed = TTY_OP_OSPEED_PROTO1;
	293	tty_op_ispeed = TTY_OP_ISPEED_PROTO1;
	294	put_arg = (void ()(Buffer , u_int)) buffer_put_char;
5260325f	295	}
30dcc918	296
	297	if (tiop == NULL) {
	298	if (tcgetattr(fd, &tio) == -1) {
bbe88b6d	299	logit("tcgetattr: %.100s", strerror(errno));
30dcc918	300	goto end;
	301	}
	302	} else
	303	tio = *tiop;
	304
5260325f	305	/* Store input and output baud rates. */
5260325f	306	baud = speed_to_baud(cfgetospeed(&tio));
b4e7177c	307	debug3("tty_make_modes: ospeed %d", baud);
30dcc918	308	buffer_put_char(&buf, tty_op_ospeed);
30dcc918	309	buffer_put_int(&buf, baud);
5260325f	310	baud = speed_to_baud(cfgetispeed(&tio));
b4e7177c	311	debug3("tty_make_modes: ispeed %d", baud);
30dcc918	312	buffer_put_char(&buf, tty_op_ispeed);
30dcc918	313	buffer_put_int(&buf, baud);
5260325f	314
5260325f	315	/* Store values of mode flags. */
8efc0c15	316	#define TTYCHAR(NAME, OP) \
b4e7177c	317	debug3("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
30dcc918	318	buffer_put_char(&buf, OP); \
879abf01	319	put_arg(&buf, special_char_encode(tio.c_cc[NAME]));
30dcc918	320
8efc0c15	321	#define TTYMODE(NAME, FIELD, OP) \
b4e7177c	322	debug3("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
30dcc918	323	buffer_put_char(&buf, OP); \
30dcc918	324	put_arg(&buf, ((tio.FIELD & NAME) != 0));
8efc0c15	325
	326	#include "ttymodes.h"
	327
	328	#undef TTYCHAR
	329	#undef TTYMODE
8efc0c15	330
30dcc918	331	end:
5260325f	332	/* Mark end of mode data. */
30dcc918	333	buffer_put_char(&buf, TTY_OP_END);
	334	if (compat20)
	335	packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
	336	else
	337	packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
	338	buffer_free(&buf);
8efc0c15	339	}
8efc0c15	340
5260325f	341	/*
	342	* Decodes terminal modes for the terminal referenced by fd in a portable
	343	* manner from a packet being read.
	344	*/
6ae2364d	345	void
5260325f	346	tty_parse_modes(int fd, int *n_bytes_ptr)
8efc0c15	347	{
5260325f	348	struct termios tio;
	349	int opcode, baud;
	350	int n_bytes = 0;
	351	int failure = 0;
30dcc918	352	u_int (*get_arg)(void);
	353	int arg, arg_size;
	354
	355	if (compat20) {
	356	*n_bytes_ptr = packet_get_int();
b4e7177c	357	debug3("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
30dcc918	358	if (*n_bytes_ptr == 0)
	359	return;
	360	get_arg = packet_get_int;
	361	arg_size = 4;
	362	} else {
	363	get_arg = packet_get_char;
	364	arg_size = 1;
	365	}
5260325f	366
	367	/*
	368	* Get old attributes for the terminal. We will modify these
	369	* flags. I am hoping that if there are any machine-specific
	370	* modes, they will initially have reasonable values.
	371	*/
30dcc918	372	if (tcgetattr(fd, &tio) == -1) {
bbe88b6d	373	logit("tcgetattr: %.100s", strerror(errno));
5260325f	374	failure = -1;
30dcc918	375	}
5260325f	376
	377	for (;;) {
	378	n_bytes += 1;
	379	opcode = packet_get_char();
	380	switch (opcode) {
	381	case TTY_OP_END:
	382	goto set;
	383
30dcc918	384	/* XXX: future conflict possible */
	385	case TTY_OP_ISPEED_PROTO1:
	386	case TTY_OP_ISPEED_PROTO2:
5260325f	387	n_bytes += 4;
5260325f	388	baud = packet_get_int();
b4e7177c	389	debug3("tty_parse_modes: ispeed %d", baud);
1cec12db	390	if (failure != -1 &&
1cec12db	391	cfsetispeed(&tio, baud_to_speed(baud)) == -1)
5260325f	392	error("cfsetispeed failed for %d", baud);
	393	break;
	394
30dcc918	395	/* XXX: future conflict possible */
	396	case TTY_OP_OSPEED_PROTO1:
	397	case TTY_OP_OSPEED_PROTO2:
5260325f	398	n_bytes += 4;
5260325f	399	baud = packet_get_int();
b4e7177c	400	debug3("tty_parse_modes: ospeed %d", baud);
1cec12db	401	if (failure != -1 &&
1cec12db	402	cfsetospeed(&tio, baud_to_speed(baud)) == -1)
5260325f	403	error("cfsetospeed failed for %d", baud);
5260325f	404	break;
8efc0c15	405
30dcc918	406	#define TTYCHAR(NAME, OP) \
	407	case OP: \
	408	n_bytes += arg_size; \
879abf01	409	tio.c_cc[NAME] = special_char_decode(get_arg()); \
b4e7177c	410	debug3("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
8efc0c15	411	break;
30dcc918	412	#define TTYMODE(NAME, FIELD, OP) \
	413	case OP: \
	414	n_bytes += arg_size; \
	415	if ((arg = get_arg())) \
	416	tio.FIELD \|= NAME; \
	417	else \
	418	tio.FIELD &= ~NAME; \
b4e7177c	419	debug3("tty_parse_modes: %d %d", OP, arg); \
8efc0c15	420	break;
8efc0c15	421
	422	#include "ttymodes.h"
	423
	424	#undef TTYCHAR
	425	#undef TTYMODE
8efc0c15	426
5260325f	427	default:
5260325f	428	debug("Ignoring unsupported tty mode opcode %d (0x%x)",
184eed6a	429	opcode, opcode);
30dcc918	430	if (!compat20) {
	431	/*
	432	* SSH1:
	433	* Opcodes 1 to 127 are defined to have
	434	* a one-byte argument.
762715ce	435	* Opcodes 128 to 159 are defined to have
	436	* an integer argument.
	437	*/
30dcc918	438	if (opcode > 0 && opcode < 128) {
	439	n_bytes += 1;
	440	(void) packet_get_char();
	441	break;
	442	} else if (opcode >= 128 && opcode < 160) {
762715ce	443	n_bytes += 4;
	444	(void) packet_get_int();
	445	break;
30dcc918	446	} else {
	447	/*
	448	* It is a truly undefined opcode (160 to 255).
	449	* We have no idea about its arguments. So we
1cec12db	450	* must stop parsing. Note that some data
	451	* may be left in the packet; hopefully there
	452	* is nothing more coming after the mode data.
30dcc918	453	*/
1cec12db	454	logit("parse_tty_modes: unknown opcode %d",
1cec12db	455	opcode);
30dcc918	456	goto set;
762715ce	457	}
5260325f	458	} else {
5260325f	459	/*
30dcc918	460	* SSH2:
e4664c3e	461	* Opcodes 1 to 159 are defined to have
30dcc918	462	* a uint32 argument.
	463	* Opcodes 160 to 255 are undefined and
	464	* cause parsing to stop.
5260325f	465	*/
30dcc918	466	if (opcode > 0 && opcode < 160) {
5260325f	467	n_bytes += 4;
	468	(void) packet_get_int();
	469	break;
30dcc918	470	} else {
1cec12db	471	logit("parse_tty_modes: unknown opcode %d",
1cec12db	472	opcode);
30dcc918	473	goto set;
5260325f	474	}
762715ce	475	}
8efc0c15	476	}
8efc0c15	477	}
8efc0c15	478
5260325f	479	set:
	480	if (*n_bytes_ptr != n_bytes) {
	481	*n_bytes_ptr = n_bytes;
bbe88b6d	482	logit("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
30dcc918	483	*n_bytes_ptr, n_bytes);
5260325f	484	return; /* Don't process bytes passed */
	485	}
	486	if (failure == -1)
e4664c3e	487	return; /* Packet parsed ok but tcgetattr() failed */
8efc0c15	488
5260325f	489	/* Set the new modes for the terminal. */
30dcc918	490	if (tcsetattr(fd, TCSANOW, &tio) == -1)
bbe88b6d	491	logit("Setting tty modes failed: %.100s", strerror(errno));
8efc0c15	492	}