[gssapi-openssh.git] / openssh / 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 1.18 2002/06/19 00:27:55 deraadt 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));
	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, 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) {
		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();
			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] = 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.
					 */
					log("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 {
					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 tcgetattr() failed */

	/* Set the new modes for the terminal. */
	if (tcsetattr(fd, TCSANOW, &tio) == -1)
		log("Setting tty modes failed: %.100s", strerror(errno));
}
Commit	Line	Data
3c0ef626	1	/*
	2	* Author: Tatu Ylonen <ylo@cs.hut.fi>
	3	* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
	4	* All rights reserved
	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".
	11	*/
	12
	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
	45	#include "includes.h"
f5799ae1	46	RCSID("$OpenBSD: ttymodes.c,v 1.18 2002/06/19 00:27:55 deraadt Exp $");
3c0ef626	47
	48	#include "packet.h"
	49	#include "log.h"
	50	#include "ssh1.h"
	51	#include "compat.h"
	52	#include "buffer.h"
	53	#include "bufaux.h"
	54
	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
	63
	64	/*
	65	* Converts POSIX speed_t to a baud rate. The values of the
	66	* constants for speed_t are not themselves portable.
	67	*/
	68	static int
	69	speed_to_baud(speed_t speed)
	70	{
	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;
	100
	101	#ifdef B19200
	102	case B19200:
	103	return 19200;
	104	#else /* B19200 */
	105	#ifdef EXTA
	106	case EXTA:
	107	return 19200;
	108	#endif /* EXTA */
	109	#endif /* B19200 */
	110
111	#ifdef B38400
112	case B38400:
113	return 38400;
114	#else /* B38400 */
115	#ifdef EXTB
116	case EXTB:
117	return 38400;
118	#endif /* EXTB */
119	#endif /* B38400 */
120
121	#ifdef B7200
122	case B7200:
123	return 7200;
124	#endif /* B7200 */
125	#ifdef B14400
126	case B14400:
127	return 14400;
128	#endif /* B14400 */
129	#ifdef B28800
130	case B28800:
131	return 28800;
132	#endif /* B28800 */
133	#ifdef B57600
134	case B57600:
135	return 57600;
136	#endif /* B57600 */
137	#ifdef B76800
138	case B76800:
139	return 76800;
140	#endif /* B76800 */
141	#ifdef B115200
142	case B115200:
143	return 115200;
144	#endif /* B115200 */
145	#ifdef B230400
146	case B230400:
147	return 230400;
148	#endif /* B230400 */
149	default:
150	return 9600;
151	}
152	}
153
154	/*
155	* Converts a numeric baud rate to a POSIX speed_t.
156	*/
157	static speed_t
158	baud_to_speed(int baud)
159	{
160	switch (baud) {
161	case 0:
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;
189
190	#ifdef B19200
191	case 19200:
192	return B19200;
193	#else /* B19200 */
194	#ifdef EXTA
195	case 19200:
196	return EXTA;
197	#endif /* EXTA */
198	#endif /* B19200 */
199
200	#ifdef B38400
201	case 38400:
202	return B38400;
203	#else /* B38400 */
204	#ifdef EXTB
205	case 38400:
206	return EXTB;
207	#endif /* EXTB */
208	#endif /* B38400 */
209
210	#ifdef B7200
211	case 7200:
212	return B7200;
213	#endif /* B7200 */
214	#ifdef B14400
215	case 14400:
216	return B14400;
217	#endif /* B14400 */
218	#ifdef B28800
219	case 28800:
220	return B28800;
221	#endif /* B28800 */
222	#ifdef B57600
223	case 57600:
224	return B57600;
225	#endif /* B57600 */
226	#ifdef B76800
227	case 76800:
228	return B76800;
229	#endif /* B76800 */
230	#ifdef B115200
231	case 115200:
232	return B115200;
233	#endif /* B115200 */
234	#ifdef B230400
235	case 230400:
236	return B230400;
237	#endif /* B230400 */
238	default:
239	return B9600;
240	}
241	}
242
243	/*
244	* Encodes terminal modes for the terminal referenced by fd
245	* or tiop in a portable manner, and appends the modes to a packet
246	* being constructed.
247	*/
248	void
249	tty_make_modes(int fd, struct termios *tiop)
250	{
251	struct termios tio;
252	int baud;
253	Buffer buf;
254	int tty_op_ospeed, tty_op_ispeed;
255	void (put_arg)(Buffer , u_int);
256
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;
266	}
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
276	/* Store input and output baud rates. */
277	baud = speed_to_baud(cfgetospeed(&tio));
278	debug3("tty_make_modes: ospeed %d", baud);
279	buffer_put_char(&buf, tty_op_ospeed);
280	buffer_put_int(&buf, baud);
281	baud = speed_to_baud(cfgetispeed(&tio));
282	debug3("tty_make_modes: ispeed %d", baud);
283	buffer_put_char(&buf, tty_op_ispeed);
284	buffer_put_int(&buf, baud);
285
286	/* Store values of mode flags. */
287	#define TTYCHAR(NAME, OP) \
288	debug3("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
292	#define TTYMODE(NAME, FIELD, OP) \
293	debug3("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
294	buffer_put_char(&buf, OP); \
295	put_arg(&buf, ((tio.FIELD & NAME) != 0));
296
297	#include "ttymodes.h"
298
299	#undef TTYCHAR
300	#undef TTYMODE
301
302	end:
303	/* Mark end of mode data. */
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);
3c0ef626	310	}
	311
	312	/*
	313	* Decodes terminal modes for the terminal referenced by fd in a portable
	314	* manner from a packet being read.
	315	*/
	316	void
	317	tty_parse_modes(int fd, int *n_bytes_ptr)
	318	{
	319	struct termios tio;
	320	int opcode, baud;
	321	int n_bytes = 0;
	322	int failure = 0;
	323	u_int (*get_arg)(void);
	324	int arg, arg_size;
	325
	326	if (compat20) {
	327	*n_bytes_ptr = packet_get_int();
	328	debug3("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
	329	if (*n_bytes_ptr == 0)
	330	return;
	331	get_arg = packet_get_int;
	332	arg_size = 4;
	333	} else {
	334	get_arg = packet_get_char;
	335	arg_size = 1;
	336	}
	337
	338	/*
	339	* Get old attributes for the terminal. We will modify these
	340	* flags. I am hoping that if there are any machine-specific
	341	* modes, they will initially have reasonable values.
	342	*/
	343	if (tcgetattr(fd, &tio) == -1) {
	344	log("tcgetattr: %.100s", strerror(errno));
	345	failure = -1;
	346	}
	347
	348	for (;;) {
	349	n_bytes += 1;
	350	opcode = packet_get_char();
	351	switch (opcode) {
	352	case TTY_OP_END:
	353	goto set;
	354
	355	/* XXX: future conflict possible */
	356	case TTY_OP_ISPEED_PROTO1:
	357	case TTY_OP_ISPEED_PROTO2:
	358	n_bytes += 4;
	359	baud = packet_get_int();
	360	debug3("tty_parse_modes: ispeed %d", baud);
	361	if (failure != -1 && cfsetispeed(&tio, baud_to_speed(baud)) == -1)
	362	error("cfsetispeed failed for %d", baud);
	363	break;
	364
	365	/* XXX: future conflict possible */
	366	case TTY_OP_OSPEED_PROTO1:
	367	case TTY_OP_OSPEED_PROTO2:
	368	n_bytes += 4;
	369	baud = packet_get_int();
	370	debug3("tty_parse_modes: ospeed %d", baud);
	371	if (failure != -1 && cfsetospeed(&tio, baud_to_speed(baud)) == -1)
	372	error("cfsetospeed failed for %d", baud);
	373	break;
374
375	#define TTYCHAR(NAME, OP) \
376	case OP: \
377	n_bytes += arg_size; \
378	tio.c_cc[NAME] = get_arg(); \
379	debug3("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
380	break;
381	#define TTYMODE(NAME, FIELD, OP) \
382	case OP: \
383	n_bytes += arg_size; \
384	if ((arg = get_arg())) \
385	tio.FIELD \|= NAME; \
386	else \
387	tio.FIELD &= ~NAME; \
388	debug3("tty_parse_modes: %d %d", OP, arg); \
389	break;
390
391	#include "ttymodes.h"
392
393	#undef TTYCHAR
394	#undef TTYMODE
395
396	default:
397	debug("Ignoring unsupported tty mode opcode %d (0x%x)",
e9a17296	398	opcode, opcode);
3c0ef626	399	if (!compat20) {
	400	/*
	401	* SSH1:
	402	* Opcodes 1 to 127 are defined to have
	403	* a one-byte argument.
700318f3	404	* Opcodes 128 to 159 are defined to have
	405	* an integer argument.
	406	*/
3c0ef626	407	if (opcode > 0 && opcode < 128) {
	408	n_bytes += 1;
	409	(void) packet_get_char();
	410	break;
	411	} else if (opcode >= 128 && opcode < 160) {
700318f3	412	n_bytes += 4;
	413	(void) packet_get_int();
	414	break;
3c0ef626	415	} else {
	416	/*
	417	* It is a truly undefined opcode (160 to 255).
	418	* We have no idea about its arguments. So we
	419	* must stop parsing. Note that some data may be
	420	* left in the packet; hopefully there is nothing
	421	* more coming after the mode data.
	422	*/
	423	log("parse_tty_modes: unknown opcode %d", opcode);
3c0ef626	424	goto set;
700318f3	425	}
3c0ef626	426	} else {
	427	/*
	428	* SSH2:
	429	* Opcodes 1 to 159 are defined to have
	430	* a uint32 argument.
	431	* Opcodes 160 to 255 are undefined and
	432	* cause parsing to stop.
	433	*/
	434	if (opcode > 0 && opcode < 160) {
	435	n_bytes += 4;
	436	(void) packet_get_int();
	437	break;
	438	} else {
	439	log("parse_tty_modes: unknown opcode %d", opcode);
	440	goto set;
	441	}
700318f3	442	}
3c0ef626	443	}
	444	}
	445
	446	set:
	447	if (*n_bytes_ptr != n_bytes) {
	448	*n_bytes_ptr = n_bytes;
	449	log("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
	450	*n_bytes_ptr, n_bytes);
	451	return; /* Don't process bytes passed */
	452	}
	453	if (failure == -1)
	454	return; /* Packet parsed ok but tcgetattr() failed */
	455
	456	/* Set the new modes for the terminal. */
	457	if (tcsetattr(fd, TCSANOW, &tio) == -1)
	458	log("Setting tty modes failed: %.100s", strerror(errno));
3c0ef626	459	}