markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 1 | /* $OpenBSD: ttymodes.c,v 1.34 2018/07/09 21:20:26 markus Exp $ */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 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". |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 12 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 13 | |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 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 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 46 | #include "includes.h" |
Damien Miller | 99bd21e | 2006-03-15 11:11:28 +1100 | [diff] [blame] | 47 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 48 | #include <sys/types.h> |
| 49 | |
Darren Tucker | 3997249 | 2006-07-12 22:22:46 +1000 | [diff] [blame] | 50 | #include <errno.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 51 | #include <string.h> |
Damien Miller | 99bd21e | 2006-03-15 11:11:28 +1100 | [diff] [blame] | 52 | #include <termios.h> |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 53 | #include <stdarg.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 54 | |
| 55 | #include "packet.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 56 | #include "log.h" |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 57 | #include "compat.h" |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 58 | #include "sshbuf.h" |
| 59 | #include "ssherr.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 60 | |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 61 | #define TTY_OP_END 0 |
| 62 | /* |
djm@openbsd.org | aebd0ab | 2017-04-30 23:26:54 +0000 | [diff] [blame] | 63 | * uint32 (u_int) follows speed. |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 64 | */ |
djm@openbsd.org | aebd0ab | 2017-04-30 23:26:54 +0000 | [diff] [blame] | 65 | #define TTY_OP_ISPEED 128 |
| 66 | #define TTY_OP_OSPEED 129 |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 67 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 68 | /* |
| 69 | * Converts POSIX speed_t to a baud rate. The values of the |
| 70 | * constants for speed_t are not themselves portable. |
| 71 | */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 72 | static int |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 73 | speed_to_baud(speed_t speed) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 74 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 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; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 104 | |
| 105 | #ifdef B19200 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 106 | case B19200: |
| 107 | return 19200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 108 | #else /* B19200 */ |
| 109 | #ifdef EXTA |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 110 | case EXTA: |
| 111 | return 19200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 112 | #endif /* EXTA */ |
| 113 | #endif /* B19200 */ |
| 114 | |
| 115 | #ifdef B38400 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 116 | case B38400: |
| 117 | return 38400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 118 | #else /* B38400 */ |
| 119 | #ifdef EXTB |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 120 | case EXTB: |
| 121 | return 38400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 122 | #endif /* EXTB */ |
| 123 | #endif /* B38400 */ |
| 124 | |
| 125 | #ifdef B7200 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 126 | case B7200: |
| 127 | return 7200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 128 | #endif /* B7200 */ |
| 129 | #ifdef B14400 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 130 | case B14400: |
| 131 | return 14400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 132 | #endif /* B14400 */ |
| 133 | #ifdef B28800 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 134 | case B28800: |
| 135 | return 28800; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 136 | #endif /* B28800 */ |
| 137 | #ifdef B57600 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 138 | case B57600: |
| 139 | return 57600; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 140 | #endif /* B57600 */ |
| 141 | #ifdef B76800 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 142 | case B76800: |
| 143 | return 76800; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 144 | #endif /* B76800 */ |
| 145 | #ifdef B115200 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 146 | case B115200: |
| 147 | return 115200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 148 | #endif /* B115200 */ |
| 149 | #ifdef B230400 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 150 | case B230400: |
| 151 | return 230400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 152 | #endif /* B230400 */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 153 | default: |
| 154 | return 9600; |
| 155 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 156 | } |
| 157 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 158 | /* |
| 159 | * Converts a numeric baud rate to a POSIX speed_t. |
| 160 | */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 161 | static speed_t |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 162 | baud_to_speed(int baud) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 163 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 164 | switch (baud) { |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 165 | case 0: |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 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; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 193 | |
| 194 | #ifdef B19200 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 195 | case 19200: |
| 196 | return B19200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 197 | #else /* B19200 */ |
| 198 | #ifdef EXTA |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 199 | case 19200: |
| 200 | return EXTA; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 201 | #endif /* EXTA */ |
| 202 | #endif /* B19200 */ |
| 203 | |
| 204 | #ifdef B38400 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 205 | case 38400: |
| 206 | return B38400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 207 | #else /* B38400 */ |
| 208 | #ifdef EXTB |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 209 | case 38400: |
| 210 | return EXTB; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 211 | #endif /* EXTB */ |
| 212 | #endif /* B38400 */ |
| 213 | |
| 214 | #ifdef B7200 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 215 | case 7200: |
| 216 | return B7200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 217 | #endif /* B7200 */ |
| 218 | #ifdef B14400 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 219 | case 14400: |
| 220 | return B14400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 221 | #endif /* B14400 */ |
| 222 | #ifdef B28800 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 223 | case 28800: |
| 224 | return B28800; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 225 | #endif /* B28800 */ |
| 226 | #ifdef B57600 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 227 | case 57600: |
| 228 | return B57600; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 229 | #endif /* B57600 */ |
| 230 | #ifdef B76800 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 231 | case 76800: |
| 232 | return B76800; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 233 | #endif /* B76800 */ |
| 234 | #ifdef B115200 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 235 | case 115200: |
| 236 | return B115200; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 237 | #endif /* B115200 */ |
| 238 | #ifdef B230400 |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 239 | case 230400: |
| 240 | return B230400; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 241 | #endif /* B230400 */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 242 | default: |
| 243 | return B9600; |
| 244 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 245 | } |
| 246 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 247 | /* |
Damien Miller | 1d10976 | 2005-08-16 21:32:09 +1000 | [diff] [blame] | 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 | |
| 273 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 274 | * Encodes terminal modes for the terminal referenced by fd |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 275 | * or tiop in a portable manner, and appends the modes to a packet |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 276 | * being constructed. |
| 277 | */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 278 | void |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 279 | ssh_tty_make_modes(struct ssh *ssh, int fd, struct termios *tiop) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 280 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 281 | struct termios tio; |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 282 | struct sshbuf *buf; |
| 283 | int r, ibaud, obaud; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 284 | |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 285 | if ((buf = sshbuf_new()) == NULL) |
| 286 | fatal("%s: sshbuf_new failed", __func__); |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 287 | |
| 288 | if (tiop == NULL) { |
Darren Tucker | dd39264 | 2008-06-08 12:53:20 +1000 | [diff] [blame] | 289 | if (fd == -1) { |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 290 | debug("%s: no fd or tio", __func__); |
Darren Tucker | dd39264 | 2008-06-08 12:53:20 +1000 | [diff] [blame] | 291 | goto end; |
| 292 | } |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 293 | if (tcgetattr(fd, &tio) == -1) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 294 | logit("tcgetattr: %.100s", strerror(errno)); |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 295 | goto end; |
| 296 | } |
| 297 | } else |
| 298 | tio = *tiop; |
| 299 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 300 | /* Store input and output baud rates. */ |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 301 | obaud = speed_to_baud(cfgetospeed(&tio)); |
| 302 | ibaud = speed_to_baud(cfgetispeed(&tio)); |
| 303 | if ((r = sshbuf_put_u8(buf, TTY_OP_OSPEED)) != 0 || |
| 304 | (r = sshbuf_put_u32(buf, obaud)) != 0 || |
| 305 | (r = sshbuf_put_u8(buf, TTY_OP_ISPEED)) != 0 || |
| 306 | (r = sshbuf_put_u32(buf, ibaud)) != 0) |
| 307 | fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 308 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 309 | /* Store values of mode flags. */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 310 | #define TTYCHAR(NAME, OP) \ |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 311 | if ((r = sshbuf_put_u8(buf, OP)) != 0 || \ |
| 312 | (r = sshbuf_put_u32(buf, \ |
| 313 | special_char_encode(tio.c_cc[NAME]))) != 0) \ |
| 314 | fatal("%s: buffer error: %s", __func__, ssh_err(r)); \ |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 315 | |
dtucker@openbsd.org | 8570177 | 2018-02-16 04:43:11 +0000 | [diff] [blame] | 316 | #define SSH_TTYMODE_IUTF8 42 /* for SSH_BUG_UTF8TTYMODE */ |
| 317 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 318 | #define TTYMODE(NAME, FIELD, OP) \ |
dtucker@openbsd.org | 8570177 | 2018-02-16 04:43:11 +0000 | [diff] [blame] | 319 | if (OP == SSH_TTYMODE_IUTF8 && (datafellows & SSH_BUG_UTF8TTYMODE)) { \ |
| 320 | debug3("%s: SSH_BUG_UTF8TTYMODE", __func__); \ |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 321 | } else if ((r = sshbuf_put_u8(buf, OP)) != 0 || \ |
| 322 | (r = sshbuf_put_u32(buf, ((tio.FIELD & NAME) != 0))) != 0) \ |
| 323 | fatal("%s: buffer error: %s", __func__, ssh_err(r)); \ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 324 | |
| 325 | #include "ttymodes.h" |
| 326 | |
| 327 | #undef TTYCHAR |
| 328 | #undef TTYMODE |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 329 | |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 330 | end: |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 331 | /* Mark end of mode data. */ |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 332 | if ((r = sshbuf_put_u8(buf, TTY_OP_END)) != 0 || |
| 333 | (r = sshpkt_put_stringb(ssh, buf)) != 0) |
| 334 | fatal("%s: packet error: %s", __func__, ssh_err(r)); |
| 335 | sshbuf_free(buf); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 336 | } |
| 337 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 338 | /* |
| 339 | * Decodes terminal modes for the terminal referenced by fd in a portable |
| 340 | * manner from a packet being read. |
| 341 | */ |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 342 | void |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 343 | ssh_tty_parse_modes(struct ssh *ssh, int fd) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 344 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 345 | struct termios tio; |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 346 | struct sshbuf *buf; |
| 347 | const u_char *data; |
| 348 | u_char opcode; |
| 349 | u_int baud, u; |
| 350 | int r, failure = 0; |
| 351 | size_t len; |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 352 | |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 353 | if ((r = sshpkt_get_string_direct(ssh, &data, &len)) != 0) |
| 354 | fatal("%s: packet error: %s", __func__, ssh_err(r)); |
| 355 | if (len == 0) |
djm@openbsd.org | 97f4d30 | 2017-04-30 23:13:25 +0000 | [diff] [blame] | 356 | return; |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 357 | if ((buf = sshbuf_from(data, len)) == NULL) { |
| 358 | error("%s: sshbuf_from failed", __func__); |
| 359 | return; |
| 360 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 361 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 362 | /* |
| 363 | * Get old attributes for the terminal. We will modify these |
| 364 | * flags. I am hoping that if there are any machine-specific |
| 365 | * modes, they will initially have reasonable values. |
| 366 | */ |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 367 | if (tcgetattr(fd, &tio) == -1) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 368 | logit("tcgetattr: %.100s", strerror(errno)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 369 | failure = -1; |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 370 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 371 | |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 372 | while (sshbuf_len(buf) > 0) { |
| 373 | if ((r = sshbuf_get_u8(buf, &opcode)) != 0) |
| 374 | fatal("%s: packet error: %s", __func__, ssh_err(r)); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 375 | switch (opcode) { |
| 376 | case TTY_OP_END: |
| 377 | goto set; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 378 | |
djm@openbsd.org | aebd0ab | 2017-04-30 23:26:54 +0000 | [diff] [blame] | 379 | case TTY_OP_ISPEED: |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 380 | if ((r = sshbuf_get_u32(buf, &baud)) != 0) |
| 381 | fatal("%s: packet error: %s", |
| 382 | __func__, ssh_err(r)); |
Damien Miller | a5a2859 | 2006-03-26 14:10:34 +1100 | [diff] [blame] | 383 | if (failure != -1 && |
| 384 | cfsetispeed(&tio, baud_to_speed(baud)) == -1) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 385 | error("cfsetispeed failed for %d", baud); |
| 386 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 387 | |
djm@openbsd.org | aebd0ab | 2017-04-30 23:26:54 +0000 | [diff] [blame] | 388 | case TTY_OP_OSPEED: |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 389 | if ((r = sshbuf_get_u32(buf, &baud)) != 0) |
| 390 | fatal("%s: packet error: %s", |
| 391 | __func__, ssh_err(r)); |
Damien Miller | a5a2859 | 2006-03-26 14:10:34 +1100 | [diff] [blame] | 392 | if (failure != -1 && |
| 393 | cfsetospeed(&tio, baud_to_speed(baud)) == -1) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 394 | error("cfsetospeed failed for %d", baud); |
| 395 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 396 | |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 397 | #define TTYCHAR(NAME, OP) \ |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 398 | case OP: \ |
| 399 | if ((r = sshbuf_get_u32(buf, &u)) != 0) \ |
| 400 | fatal("%s: packet error: %s", __func__, \ |
| 401 | ssh_err(r)); \ |
| 402 | tio.c_cc[NAME] = special_char_decode(u); \ |
| 403 | break; |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 404 | #define TTYMODE(NAME, FIELD, OP) \ |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 405 | case OP: \ |
| 406 | if ((r = sshbuf_get_u32(buf, &u)) != 0) \ |
| 407 | fatal("%s: packet error: %s", __func__, \ |
| 408 | ssh_err(r)); \ |
| 409 | if (u) \ |
| 410 | tio.FIELD |= NAME; \ |
| 411 | else \ |
| 412 | tio.FIELD &= ~NAME; \ |
| 413 | break; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 414 | |
| 415 | #include "ttymodes.h" |
| 416 | |
| 417 | #undef TTYCHAR |
| 418 | #undef TTYMODE |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 419 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 420 | default: |
| 421 | debug("Ignoring unsupported tty mode opcode %d (0x%x)", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 422 | opcode, opcode); |
djm@openbsd.org | 97f4d30 | 2017-04-30 23:13:25 +0000 | [diff] [blame] | 423 | /* |
| 424 | * SSH2: |
| 425 | * Opcodes 1 to 159 are defined to have a uint32 |
| 426 | * argument. |
| 427 | * Opcodes 160 to 255 are undefined and cause parsing |
| 428 | * to stop. |
| 429 | */ |
| 430 | if (opcode > 0 && opcode < 160) { |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 431 | if ((r = sshbuf_get_u32(buf, NULL)) != 0) |
| 432 | fatal("%s: packet error: %s", __func__, |
| 433 | ssh_err(r)); |
djm@openbsd.org | 97f4d30 | 2017-04-30 23:13:25 +0000 | [diff] [blame] | 434 | break; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 435 | } else { |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 436 | logit("%s: unknown opcode %d", __func__, |
djm@openbsd.org | 97f4d30 | 2017-04-30 23:13:25 +0000 | [diff] [blame] | 437 | opcode); |
| 438 | goto set; |
Ben Lindstrom | 6328ab3 | 2002-03-22 02:54:23 +0000 | [diff] [blame] | 439 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 440 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 441 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 442 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 443 | set: |
markus@openbsd.org | 89dd615 | 2018-07-09 21:20:26 +0000 | [diff] [blame^] | 444 | len = sshbuf_len(buf); |
| 445 | sshbuf_free(buf); |
| 446 | if (len > 0) { |
| 447 | logit("%s: %zu bytes left", __func__, len); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 448 | return; /* Don't process bytes passed */ |
| 449 | } |
| 450 | if (failure == -1) |
Ben Lindstrom | ac2f003 | 2001-04-15 14:25:12 +0000 | [diff] [blame] | 451 | return; /* Packet parsed ok but tcgetattr() failed */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 452 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 453 | /* Set the new modes for the terminal. */ |
Ben Lindstrom | ae8e2d3 | 2001-04-14 23:13:02 +0000 | [diff] [blame] | 454 | if (tcsetattr(fd, TCSANOW, &tio) == -1) |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 455 | logit("Setting tty modes failed: %.100s", strerror(errno)); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 456 | } |