blob: d8e2c553abd6d079740db22f67efddb71c9ed57d [file] [log] [blame]
Damien Millerd7834352006-08-05 12:39:39 +10001/* $OpenBSD: ttymodes.c,v 1.26 2006/08/03 03:34:42 deraadt Exp $ */
Damien Millerd4a8b7e1999-10-27 13:42:43 +10002/*
Damien Miller95def091999-11-25 00:26:21 +11003 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * All rights reserved
Damien Millere4340be2000-09-16 13:29:08 +11006 *
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".
Damien Miller95def091999-11-25 00:26:21 +110012 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100013
Ben Lindstromae8e2d32001-04-14 23:13:02 +000014/*
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
Damien Millerd4a8b7e1999-10-27 13:42:43 +100046#include "includes.h"
Damien Miller99bd21e2006-03-15 11:11:28 +110047
Damien Millerd7834352006-08-05 12:39:39 +100048#include <sys/types.h>
49
Darren Tucker39972492006-07-12 22:22:46 +100050#include <errno.h>
Damien Millere3476ed2006-07-24 14:13:33 +100051#include <string.h>
Damien Miller99bd21e2006-03-15 11:11:28 +110052#include <termios.h>
Damien Millerd7834352006-08-05 12:39:39 +100053#include <stdarg.h>
Damien Millerd4a8b7e1999-10-27 13:42:43 +100054
55#include "packet.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000056#include "log.h"
57#include "ssh1.h"
Ben Lindstromae8e2d32001-04-14 23:13:02 +000058#include "compat.h"
59#include "buffer.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100060
Ben Lindstromae8e2d32001-04-14 23:13:02 +000061#define TTY_OP_END 0
62/*
63 * uint32 (u_int) follows speed in SSH1 and SSH2
64 */
65#define TTY_OP_ISPEED_PROTO1 192
66#define TTY_OP_OSPEED_PROTO1 193
67#define TTY_OP_ISPEED_PROTO2 128
68#define TTY_OP_OSPEED_PROTO2 129
Damien Millerd4a8b7e1999-10-27 13:42:43 +100069
Damien Miller95def091999-11-25 00:26:21 +110070/*
71 * Converts POSIX speed_t to a baud rate. The values of the
72 * constants for speed_t are not themselves portable.
73 */
Damien Miller4af51302000-04-16 11:18:38 +100074static int
Damien Miller95def091999-11-25 00:26:21 +110075speed_to_baud(speed_t speed)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100076{
Damien Miller95def091999-11-25 00:26:21 +110077 switch (speed) {
78 case B0:
79 return 0;
80 case B50:
81 return 50;
82 case B75:
83 return 75;
84 case B110:
85 return 110;
86 case B134:
87 return 134;
88 case B150:
89 return 150;
90 case B200:
91 return 200;
92 case B300:
93 return 300;
94 case B600:
95 return 600;
96 case B1200:
97 return 1200;
98 case B1800:
99 return 1800;
100 case B2400:
101 return 2400;
102 case B4800:
103 return 4800;
104 case B9600:
105 return 9600;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000106
107#ifdef B19200
Damien Miller95def091999-11-25 00:26:21 +1100108 case B19200:
109 return 19200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000110#else /* B19200 */
111#ifdef EXTA
Damien Miller95def091999-11-25 00:26:21 +1100112 case EXTA:
113 return 19200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000114#endif /* EXTA */
115#endif /* B19200 */
116
117#ifdef B38400
Damien Miller95def091999-11-25 00:26:21 +1100118 case B38400:
119 return 38400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000120#else /* B38400 */
121#ifdef EXTB
Damien Miller95def091999-11-25 00:26:21 +1100122 case EXTB:
123 return 38400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000124#endif /* EXTB */
125#endif /* B38400 */
126
127#ifdef B7200
Damien Miller95def091999-11-25 00:26:21 +1100128 case B7200:
129 return 7200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000130#endif /* B7200 */
131#ifdef B14400
Damien Miller95def091999-11-25 00:26:21 +1100132 case B14400:
133 return 14400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000134#endif /* B14400 */
135#ifdef B28800
Damien Miller95def091999-11-25 00:26:21 +1100136 case B28800:
137 return 28800;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000138#endif /* B28800 */
139#ifdef B57600
Damien Miller95def091999-11-25 00:26:21 +1100140 case B57600:
141 return 57600;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000142#endif /* B57600 */
143#ifdef B76800
Damien Miller95def091999-11-25 00:26:21 +1100144 case B76800:
145 return 76800;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000146#endif /* B76800 */
147#ifdef B115200
Damien Miller95def091999-11-25 00:26:21 +1100148 case B115200:
149 return 115200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000150#endif /* B115200 */
151#ifdef B230400
Damien Miller95def091999-11-25 00:26:21 +1100152 case B230400:
153 return 230400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000154#endif /* B230400 */
Damien Miller95def091999-11-25 00:26:21 +1100155 default:
156 return 9600;
157 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000158}
159
Damien Miller95def091999-11-25 00:26:21 +1100160/*
161 * Converts a numeric baud rate to a POSIX speed_t.
162 */
Damien Miller4af51302000-04-16 11:18:38 +1000163static speed_t
Damien Miller95def091999-11-25 00:26:21 +1100164baud_to_speed(int baud)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000165{
Damien Miller95def091999-11-25 00:26:21 +1100166 switch (baud) {
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000167 case 0:
Damien Miller95def091999-11-25 00:26:21 +1100168 return B0;
169 case 50:
170 return B50;
171 case 75:
172 return B75;
173 case 110:
174 return B110;
175 case 134:
176 return B134;
177 case 150:
178 return B150;
179 case 200:
180 return B200;
181 case 300:
182 return B300;
183 case 600:
184 return B600;
185 case 1200:
186 return B1200;
187 case 1800:
188 return B1800;
189 case 2400:
190 return B2400;
191 case 4800:
192 return B4800;
193 case 9600:
194 return B9600;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000195
196#ifdef B19200
Damien Miller95def091999-11-25 00:26:21 +1100197 case 19200:
198 return B19200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000199#else /* B19200 */
200#ifdef EXTA
Damien Miller95def091999-11-25 00:26:21 +1100201 case 19200:
202 return EXTA;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000203#endif /* EXTA */
204#endif /* B19200 */
205
206#ifdef B38400
Damien Miller95def091999-11-25 00:26:21 +1100207 case 38400:
208 return B38400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000209#else /* B38400 */
210#ifdef EXTB
Damien Miller95def091999-11-25 00:26:21 +1100211 case 38400:
212 return EXTB;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000213#endif /* EXTB */
214#endif /* B38400 */
215
216#ifdef B7200
Damien Miller95def091999-11-25 00:26:21 +1100217 case 7200:
218 return B7200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000219#endif /* B7200 */
220#ifdef B14400
Damien Miller95def091999-11-25 00:26:21 +1100221 case 14400:
222 return B14400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000223#endif /* B14400 */
224#ifdef B28800
Damien Miller95def091999-11-25 00:26:21 +1100225 case 28800:
226 return B28800;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000227#endif /* B28800 */
228#ifdef B57600
Damien Miller95def091999-11-25 00:26:21 +1100229 case 57600:
230 return B57600;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000231#endif /* B57600 */
232#ifdef B76800
Damien Miller95def091999-11-25 00:26:21 +1100233 case 76800:
234 return B76800;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000235#endif /* B76800 */
236#ifdef B115200
Damien Miller95def091999-11-25 00:26:21 +1100237 case 115200:
238 return B115200;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000239#endif /* B115200 */
240#ifdef B230400
Damien Miller95def091999-11-25 00:26:21 +1100241 case 230400:
242 return B230400;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000243#endif /* B230400 */
Damien Miller95def091999-11-25 00:26:21 +1100244 default:
245 return B9600;
246 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000247}
248
Damien Miller95def091999-11-25 00:26:21 +1100249/*
Damien Miller1d109762005-08-16 21:32:09 +1000250 * Encode a special character into SSH line format.
251 */
252static u_int
253special_char_encode(cc_t c)
254{
255#ifdef _POSIX_VDISABLE
256 if (c == _POSIX_VDISABLE)
257 return 255;
258#endif /* _POSIX_VDISABLE */
259 return c;
260}
261
262/*
263 * Decode a special character from SSH line format.
264 */
265static cc_t
266special_char_decode(u_int c)
267{
268#ifdef _POSIX_VDISABLE
269 if (c == 255)
270 return _POSIX_VDISABLE;
271#endif /* _POSIX_VDISABLE */
272 return c;
273}
274
275/*
Damien Miller95def091999-11-25 00:26:21 +1100276 * Encodes terminal modes for the terminal referenced by fd
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000277 * or tiop in a portable manner, and appends the modes to a packet
Damien Miller95def091999-11-25 00:26:21 +1100278 * being constructed.
279 */
Damien Miller4af51302000-04-16 11:18:38 +1000280void
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000281tty_make_modes(int fd, struct termios *tiop)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000282{
Damien Miller95def091999-11-25 00:26:21 +1100283 struct termios tio;
284 int baud;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000285 Buffer buf;
286 int tty_op_ospeed, tty_op_ispeed;
287 void (*put_arg)(Buffer *, u_int);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000288
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000289 buffer_init(&buf);
290 if (compat20) {
291 tty_op_ospeed = TTY_OP_OSPEED_PROTO2;
292 tty_op_ispeed = TTY_OP_ISPEED_PROTO2;
293 put_arg = buffer_put_int;
294 } else {
295 tty_op_ospeed = TTY_OP_OSPEED_PROTO1;
296 tty_op_ispeed = TTY_OP_ISPEED_PROTO1;
297 put_arg = (void (*)(Buffer *, u_int)) buffer_put_char;
Damien Miller95def091999-11-25 00:26:21 +1100298 }
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000299
300 if (tiop == NULL) {
301 if (tcgetattr(fd, &tio) == -1) {
Damien Miller996acd22003-04-09 20:59:48 +1000302 logit("tcgetattr: %.100s", strerror(errno));
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000303 goto end;
304 }
305 } else
306 tio = *tiop;
307
Damien Miller95def091999-11-25 00:26:21 +1100308 /* Store input and output baud rates. */
309 baud = speed_to_baud(cfgetospeed(&tio));
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000310 debug3("tty_make_modes: ospeed %d", baud);
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000311 buffer_put_char(&buf, tty_op_ospeed);
312 buffer_put_int(&buf, baud);
Damien Miller95def091999-11-25 00:26:21 +1100313 baud = speed_to_baud(cfgetispeed(&tio));
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000314 debug3("tty_make_modes: ispeed %d", baud);
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000315 buffer_put_char(&buf, tty_op_ispeed);
316 buffer_put_int(&buf, baud);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000317
Damien Miller95def091999-11-25 00:26:21 +1100318 /* Store values of mode flags. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000319#define TTYCHAR(NAME, OP) \
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000320 debug3("tty_make_modes: %d %d", OP, tio.c_cc[NAME]); \
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000321 buffer_put_char(&buf, OP); \
Damien Miller1d109762005-08-16 21:32:09 +1000322 put_arg(&buf, special_char_encode(tio.c_cc[NAME]));
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000323
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000324#define TTYMODE(NAME, FIELD, OP) \
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000325 debug3("tty_make_modes: %d %d", OP, ((tio.FIELD & NAME) != 0)); \
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000326 buffer_put_char(&buf, OP); \
327 put_arg(&buf, ((tio.FIELD & NAME) != 0));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000328
329#include "ttymodes.h"
330
331#undef TTYCHAR
332#undef TTYMODE
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000333
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000334end:
Damien Miller95def091999-11-25 00:26:21 +1100335 /* Mark end of mode data. */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000336 buffer_put_char(&buf, TTY_OP_END);
337 if (compat20)
338 packet_put_string(buffer_ptr(&buf), buffer_len(&buf));
339 else
340 packet_put_raw(buffer_ptr(&buf), buffer_len(&buf));
341 buffer_free(&buf);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000342}
343
Damien Miller95def091999-11-25 00:26:21 +1100344/*
345 * Decodes terminal modes for the terminal referenced by fd in a portable
346 * manner from a packet being read.
347 */
Damien Miller4af51302000-04-16 11:18:38 +1000348void
Damien Miller95def091999-11-25 00:26:21 +1100349tty_parse_modes(int fd, int *n_bytes_ptr)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000350{
Damien Miller95def091999-11-25 00:26:21 +1100351 struct termios tio;
352 int opcode, baud;
353 int n_bytes = 0;
354 int failure = 0;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000355 u_int (*get_arg)(void);
356 int arg, arg_size;
357
358 if (compat20) {
359 *n_bytes_ptr = packet_get_int();
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000360 debug3("tty_parse_modes: SSH2 n_bytes %d", *n_bytes_ptr);
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000361 if (*n_bytes_ptr == 0)
362 return;
363 get_arg = packet_get_int;
364 arg_size = 4;
365 } else {
366 get_arg = packet_get_char;
367 arg_size = 1;
368 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000369
Damien Miller95def091999-11-25 00:26:21 +1100370 /*
371 * Get old attributes for the terminal. We will modify these
372 * flags. I am hoping that if there are any machine-specific
373 * modes, they will initially have reasonable values.
374 */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000375 if (tcgetattr(fd, &tio) == -1) {
Damien Miller996acd22003-04-09 20:59:48 +1000376 logit("tcgetattr: %.100s", strerror(errno));
Damien Miller95def091999-11-25 00:26:21 +1100377 failure = -1;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000378 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000379
Damien Miller95def091999-11-25 00:26:21 +1100380 for (;;) {
381 n_bytes += 1;
382 opcode = packet_get_char();
383 switch (opcode) {
384 case TTY_OP_END:
385 goto set;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000386
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000387 /* XXX: future conflict possible */
388 case TTY_OP_ISPEED_PROTO1:
389 case TTY_OP_ISPEED_PROTO2:
Damien Miller95def091999-11-25 00:26:21 +1100390 n_bytes += 4;
391 baud = packet_get_int();
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000392 debug3("tty_parse_modes: ispeed %d", baud);
Damien Millera5a28592006-03-26 14:10:34 +1100393 if (failure != -1 &&
394 cfsetispeed(&tio, baud_to_speed(baud)) == -1)
Damien Miller95def091999-11-25 00:26:21 +1100395 error("cfsetispeed failed for %d", baud);
396 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000397
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000398 /* XXX: future conflict possible */
399 case TTY_OP_OSPEED_PROTO1:
400 case TTY_OP_OSPEED_PROTO2:
Damien Miller95def091999-11-25 00:26:21 +1100401 n_bytes += 4;
402 baud = packet_get_int();
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000403 debug3("tty_parse_modes: ospeed %d", baud);
Damien Millera5a28592006-03-26 14:10:34 +1100404 if (failure != -1 &&
405 cfsetospeed(&tio, baud_to_speed(baud)) == -1)
Damien Miller95def091999-11-25 00:26:21 +1100406 error("cfsetospeed failed for %d", baud);
407 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000408
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000409#define TTYCHAR(NAME, OP) \
410 case OP: \
411 n_bytes += arg_size; \
Damien Miller1d109762005-08-16 21:32:09 +1000412 tio.c_cc[NAME] = special_char_decode(get_arg()); \
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000413 debug3("tty_parse_modes: %d %d", OP, tio.c_cc[NAME]); \
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000414 break;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000415#define TTYMODE(NAME, FIELD, OP) \
416 case OP: \
417 n_bytes += arg_size; \
418 if ((arg = get_arg())) \
419 tio.FIELD |= NAME; \
420 else \
421 tio.FIELD &= ~NAME; \
Ben Lindstrom491bbb82001-06-25 05:24:16 +0000422 debug3("tty_parse_modes: %d %d", OP, arg); \
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000423 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000424
425#include "ttymodes.h"
426
427#undef TTYCHAR
428#undef TTYMODE
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000429
Damien Miller95def091999-11-25 00:26:21 +1100430 default:
431 debug("Ignoring unsupported tty mode opcode %d (0x%x)",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100432 opcode, opcode);
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000433 if (!compat20) {
434 /*
435 * SSH1:
436 * Opcodes 1 to 127 are defined to have
437 * a one-byte argument.
Ben Lindstrom6328ab32002-03-22 02:54:23 +0000438 * Opcodes 128 to 159 are defined to have
439 * an integer argument.
440 */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000441 if (opcode > 0 && opcode < 128) {
442 n_bytes += 1;
443 (void) packet_get_char();
444 break;
445 } else if (opcode >= 128 && opcode < 160) {
Ben Lindstrom6328ab32002-03-22 02:54:23 +0000446 n_bytes += 4;
447 (void) packet_get_int();
448 break;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000449 } else {
450 /*
451 * It is a truly undefined opcode (160 to 255).
452 * We have no idea about its arguments. So we
Damien Millera5a28592006-03-26 14:10:34 +1100453 * must stop parsing. Note that some data
454 * may be left in the packet; hopefully there
455 * is nothing more coming after the mode data.
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000456 */
Damien Millera5a28592006-03-26 14:10:34 +1100457 logit("parse_tty_modes: unknown opcode %d",
458 opcode);
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000459 goto set;
Ben Lindstrom6328ab32002-03-22 02:54:23 +0000460 }
Damien Miller95def091999-11-25 00:26:21 +1100461 } else {
462 /*
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000463 * SSH2:
Ben Lindstromac2f0032001-04-15 14:25:12 +0000464 * Opcodes 1 to 159 are defined to have
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000465 * a uint32 argument.
466 * Opcodes 160 to 255 are undefined and
467 * cause parsing to stop.
Damien Miller95def091999-11-25 00:26:21 +1100468 */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000469 if (opcode > 0 && opcode < 160) {
Damien Miller95def091999-11-25 00:26:21 +1100470 n_bytes += 4;
471 (void) packet_get_int();
472 break;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000473 } else {
Damien Millera5a28592006-03-26 14:10:34 +1100474 logit("parse_tty_modes: unknown opcode %d",
475 opcode);
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000476 goto set;
Damien Miller95def091999-11-25 00:26:21 +1100477 }
Ben Lindstrom6328ab32002-03-22 02:54:23 +0000478 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000479 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000480 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000481
Damien Miller95def091999-11-25 00:26:21 +1100482set:
483 if (*n_bytes_ptr != n_bytes) {
484 *n_bytes_ptr = n_bytes;
Damien Miller996acd22003-04-09 20:59:48 +1000485 logit("parse_tty_modes: n_bytes_ptr != n_bytes: %d %d",
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000486 *n_bytes_ptr, n_bytes);
Damien Miller95def091999-11-25 00:26:21 +1100487 return; /* Don't process bytes passed */
488 }
489 if (failure == -1)
Ben Lindstromac2f0032001-04-15 14:25:12 +0000490 return; /* Packet parsed ok but tcgetattr() failed */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000491
Damien Miller95def091999-11-25 00:26:21 +1100492 /* Set the new modes for the terminal. */
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000493 if (tcsetattr(fd, TCSANOW, &tio) == -1)
Damien Miller996acd22003-04-09 20:59:48 +1000494 logit("Setting tty modes failed: %.100s", strerror(errno));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000495}