diff options
author | Damien Miller <djm@mindrot.org> | 1999-10-27 13:42:43 +1000 |
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committer | Damien Miller <djm@mindrot.org> | 1999-10-27 13:42:43 +1000 |
commit | d4a8b7e34dd619a4debf9a206c81db26d1402ea6 (patch) | |
tree | a47d770a2f790f40d18b0982d4e55fa7cfb1fa3b /ttymodes.c |
Initial revision
Diffstat (limited to 'ttymodes.c')
-rw-r--r-- | ttymodes.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/ttymodes.c b/ttymodes.c new file mode 100644 index 000000000..cbb7f2f64 --- /dev/null +++ b/ttymodes.c | |||
@@ -0,0 +1,359 @@ | |||
1 | /* | ||
2 | |||
3 | ttymodes.c | ||
4 | |||
5 | Author: Tatu Ylonen <ylo@cs.hut.fi> | ||
6 | |||
7 | Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | ||
8 | All rights reserved | ||
9 | |||
10 | Created: Tue Mar 21 15:59:15 1995 ylo | ||
11 | |||
12 | Encoding and decoding of terminal modes in a portable way. | ||
13 | Much of the format is defined in ttymodes.h; it is included multiple times | ||
14 | into this file with the appropriate macro definitions to generate the | ||
15 | suitable code. | ||
16 | |||
17 | */ | ||
18 | |||
19 | #include "includes.h" | ||
20 | RCSID("$Id: ttymodes.c,v 1.1 1999/10/27 03:42:46 damien Exp $"); | ||
21 | |||
22 | #include "packet.h" | ||
23 | #include "ssh.h" | ||
24 | |||
25 | #define TTY_OP_END 0 | ||
26 | #define TTY_OP_ISPEED 192 /* int follows */ | ||
27 | #define TTY_OP_OSPEED 193 /* int follows */ | ||
28 | |||
29 | /* Converts POSIX speed_t to a baud rate. The values of the constants | ||
30 | for speed_t are not themselves portable. */ | ||
31 | |||
32 | static int speed_to_baud(speed_t speed) | ||
33 | { | ||
34 | switch (speed) | ||
35 | { | ||
36 | case B0: | ||
37 | return 0; | ||
38 | case B50: | ||
39 | return 50; | ||
40 | case B75: | ||
41 | return 75; | ||
42 | case B110: | ||
43 | return 110; | ||
44 | case B134: | ||
45 | return 134; | ||
46 | case B150: | ||
47 | return 150; | ||
48 | case B200: | ||
49 | return 200; | ||
50 | case B300: | ||
51 | return 300; | ||
52 | case B600: | ||
53 | return 600; | ||
54 | case B1200: | ||
55 | return 1200; | ||
56 | case B1800: | ||
57 | return 1800; | ||
58 | case B2400: | ||
59 | return 2400; | ||
60 | case B4800: | ||
61 | return 4800; | ||
62 | case B9600: | ||
63 | return 9600; | ||
64 | |||
65 | #ifdef B19200 | ||
66 | case B19200: | ||
67 | return 19200; | ||
68 | #else /* B19200 */ | ||
69 | #ifdef EXTA | ||
70 | case EXTA: | ||
71 | return 19200; | ||
72 | #endif /* EXTA */ | ||
73 | #endif /* B19200 */ | ||
74 | |||
75 | #ifdef B38400 | ||
76 | case B38400: | ||
77 | return 38400; | ||
78 | #else /* B38400 */ | ||
79 | #ifdef EXTB | ||
80 | case EXTB: | ||
81 | return 38400; | ||
82 | #endif /* EXTB */ | ||
83 | #endif /* B38400 */ | ||
84 | |||
85 | #ifdef B7200 | ||
86 | case B7200: | ||
87 | return 7200; | ||
88 | #endif /* B7200 */ | ||
89 | #ifdef B14400 | ||
90 | case B14400: | ||
91 | return 14400; | ||
92 | #endif /* B14400 */ | ||
93 | #ifdef B28800 | ||
94 | case B28800: | ||
95 | return 28800; | ||
96 | #endif /* B28800 */ | ||
97 | #ifdef B57600 | ||
98 | case B57600: | ||
99 | return 57600; | ||
100 | #endif /* B57600 */ | ||
101 | #ifdef B76800 | ||
102 | case B76800: | ||
103 | return 76800; | ||
104 | #endif /* B76800 */ | ||
105 | #ifdef B115200 | ||
106 | case B115200: | ||
107 | return 115200; | ||
108 | #endif /* B115200 */ | ||
109 | #ifdef B230400 | ||
110 | case B230400: | ||
111 | return 230400; | ||
112 | #endif /* B230400 */ | ||
113 | default: | ||
114 | return 9600; | ||
115 | } | ||
116 | } | ||
117 | |||
118 | /* Converts a numeric baud rate to a POSIX speed_t. */ | ||
119 | |||
120 | static speed_t baud_to_speed(int baud) | ||
121 | { | ||
122 | switch (baud) | ||
123 | { | ||
124 | case 0: | ||
125 | return B0; | ||
126 | case 50: | ||
127 | return B50; | ||
128 | case 75: | ||
129 | return B75; | ||
130 | case 110: | ||
131 | return B110; | ||
132 | case 134: | ||
133 | return B134; | ||
134 | case 150: | ||
135 | return B150; | ||
136 | case 200: | ||
137 | return B200; | ||
138 | case 300: | ||
139 | return B300; | ||
140 | case 600: | ||
141 | return B600; | ||
142 | case 1200: | ||
143 | return B1200; | ||
144 | case 1800: | ||
145 | return B1800; | ||
146 | case 2400: | ||
147 | return B2400; | ||
148 | case 4800: | ||
149 | return B4800; | ||
150 | case 9600: | ||
151 | return B9600; | ||
152 | |||
153 | #ifdef B19200 | ||
154 | case 19200: | ||
155 | return B19200; | ||
156 | #else /* B19200 */ | ||
157 | #ifdef EXTA | ||
158 | case 19200: | ||
159 | return EXTA; | ||
160 | #endif /* EXTA */ | ||
161 | #endif /* B19200 */ | ||
162 | |||
163 | #ifdef B38400 | ||
164 | case 38400: | ||
165 | return B38400; | ||
166 | #else /* B38400 */ | ||
167 | #ifdef EXTB | ||
168 | case 38400: | ||
169 | return EXTB; | ||
170 | #endif /* EXTB */ | ||
171 | #endif /* B38400 */ | ||
172 | |||
173 | #ifdef B7200 | ||
174 | case 7200: | ||
175 | return B7200; | ||
176 | #endif /* B7200 */ | ||
177 | #ifdef B14400 | ||
178 | case 14400: | ||
179 | return B14400; | ||
180 | #endif /* B14400 */ | ||
181 | #ifdef B28800 | ||
182 | case 28800: | ||
183 | return B28800; | ||
184 | #endif /* B28800 */ | ||
185 | #ifdef B57600 | ||
186 | case 57600: | ||
187 | return B57600; | ||
188 | #endif /* B57600 */ | ||
189 | #ifdef B76800 | ||
190 | case 76800: | ||
191 | return B76800; | ||
192 | #endif /* B76800 */ | ||
193 | #ifdef B115200 | ||
194 | case 115200: | ||
195 | return B115200; | ||
196 | #endif /* B115200 */ | ||
197 | #ifdef B230400 | ||
198 | case 230400: | ||
199 | return B230400; | ||
200 | #endif /* B230400 */ | ||
201 | default: | ||
202 | return B9600; | ||
203 | } | ||
204 | } | ||
205 | |||
206 | /* Encodes terminal modes for the terminal referenced by fd in a portable | ||
207 | manner, and appends the modes to a packet being constructed. */ | ||
208 | |||
209 | void tty_make_modes(int fd) | ||
210 | { | ||
211 | struct termios tio; | ||
212 | int baud; | ||
213 | |||
214 | /* Get the modes. */ | ||
215 | if (tcgetattr(fd, &tio) < 0) | ||
216 | { | ||
217 | packet_put_char(TTY_OP_END); | ||
218 | log("tcgetattr: %.100s", strerror(errno)); | ||
219 | return; | ||
220 | } | ||
221 | |||
222 | /* Store input and output baud rates. */ | ||
223 | baud = speed_to_baud(cfgetospeed(&tio)); | ||
224 | packet_put_char(TTY_OP_OSPEED); | ||
225 | packet_put_int(baud); | ||
226 | baud = speed_to_baud(cfgetispeed(&tio)); | ||
227 | packet_put_char(TTY_OP_ISPEED); | ||
228 | packet_put_int(baud); | ||
229 | |||
230 | /* Store values of mode flags. */ | ||
231 | #define TTYCHAR(NAME, OP) \ | ||
232 | packet_put_char(OP); packet_put_char(tio.c_cc[NAME]); | ||
233 | #define TTYMODE(NAME, FIELD, OP) \ | ||
234 | packet_put_char(OP); packet_put_char((tio.FIELD & NAME) != 0); | ||
235 | #define SGTTYCHAR(NAME, OP) | ||
236 | #define SGTTYMODE(NAME, FIELD, OP) | ||
237 | #define SGTTYMODEN(NAME, FIELD, OP) | ||
238 | |||
239 | #include "ttymodes.h" | ||
240 | |||
241 | #undef TTYCHAR | ||
242 | #undef TTYMODE | ||
243 | #undef SGTTYCHAR | ||
244 | #undef SGTTYMODE | ||
245 | #undef SGTTYMODEN | ||
246 | |||
247 | /* Mark end of mode data. */ | ||
248 | packet_put_char(TTY_OP_END); | ||
249 | } | ||
250 | |||
251 | /* Decodes terminal modes for the terminal referenced by fd in a portable | ||
252 | manner from a packet being read. */ | ||
253 | |||
254 | void tty_parse_modes(int fd, int *n_bytes_ptr) | ||
255 | { | ||
256 | struct termios tio; | ||
257 | int opcode, baud; | ||
258 | int n_bytes = 0; | ||
259 | int failure = 0; | ||
260 | |||
261 | /* Get old attributes for the terminal. We will modify these flags. | ||
262 | I am hoping that if there are any machine-specific modes, they will | ||
263 | initially have reasonable values. */ | ||
264 | if (tcgetattr(fd, &tio) < 0) | ||
265 | failure = -1; | ||
266 | |||
267 | for (;;) | ||
268 | { | ||
269 | n_bytes += 1; | ||
270 | opcode = packet_get_char(); | ||
271 | switch (opcode) | ||
272 | { | ||
273 | case TTY_OP_END: | ||
274 | goto set; | ||
275 | |||
276 | case TTY_OP_ISPEED: | ||
277 | n_bytes += 4; | ||
278 | baud = packet_get_int(); | ||
279 | if (failure != -1 && cfsetispeed(&tio, baud_to_speed(baud)) < 0) | ||
280 | error("cfsetispeed failed for %d", baud); | ||
281 | break; | ||
282 | |||
283 | case TTY_OP_OSPEED: | ||
284 | n_bytes += 4; | ||
285 | baud = packet_get_int(); | ||
286 | if (failure != -1 && cfsetospeed(&tio, baud_to_speed(baud)) < 0) | ||
287 | error("cfsetospeed failed for %d", baud); | ||
288 | break; | ||
289 | |||
290 | #define TTYCHAR(NAME, OP) \ | ||
291 | case OP: \ | ||
292 | n_bytes += 1; \ | ||
293 | tio.c_cc[NAME] = packet_get_char(); \ | ||
294 | break; | ||
295 | #define TTYMODE(NAME, FIELD, OP) \ | ||
296 | case OP: \ | ||
297 | n_bytes += 1; \ | ||
298 | if (packet_get_char()) \ | ||
299 | tio.FIELD |= NAME; \ | ||
300 | else \ | ||
301 | tio.FIELD &= ~NAME; \ | ||
302 | break; | ||
303 | #define SGTTYCHAR(NAME, OP) | ||
304 | #define SGTTYMODE(NAME, FIELD, OP) | ||
305 | #define SGTTYMODEN(NAME, FIELD, OP) | ||
306 | |||
307 | #include "ttymodes.h" | ||
308 | |||
309 | #undef TTYCHAR | ||
310 | #undef TTYMODE | ||
311 | #undef SGTTYCHAR | ||
312 | #undef SGTTYMODE | ||
313 | #undef SGTTYMODEN | ||
314 | |||
315 | default: | ||
316 | debug("Ignoring unsupported tty mode opcode %d (0x%x)", | ||
317 | opcode, opcode); | ||
318 | /* Opcodes 0 to 127 are defined to have a one-byte argument. */ | ||
319 | if (opcode >= 0 && opcode < 128) | ||
320 | { | ||
321 | n_bytes += 1; | ||
322 | (void)packet_get_char(); | ||
323 | break; | ||
324 | } | ||
325 | else | ||
326 | { | ||
327 | /* Opcodes 128 to 159 are defined to have an integer argument. */ | ||
328 | if (opcode >= 128 && opcode < 160) | ||
329 | { | ||
330 | n_bytes += 4; | ||
331 | (void)packet_get_int(); | ||
332 | break; | ||
333 | } | ||
334 | } | ||
335 | /* It is a truly undefined opcode (160 to 255). We have no idea | ||
336 | about its arguments. So we must stop parsing. Note that some | ||
337 | data may be left in the packet; hopefully there is nothing more | ||
338 | coming after the mode data. */ | ||
339 | log("parse_tty_modes: unknown opcode %d", opcode); | ||
340 | packet_integrity_check(0, 1, SSH_CMSG_REQUEST_PTY); | ||
341 | goto set; | ||
342 | } | ||
343 | } | ||
344 | |||
345 | set: | ||
346 | if (*n_bytes_ptr != n_bytes) | ||
347 | { | ||
348 | *n_bytes_ptr = n_bytes; | ||
349 | return; /* Don't process bytes passed */ | ||
350 | } | ||
351 | |||
352 | if (failure == -1) | ||
353 | return; /* Packet parsed ok but tty stuff failed */ | ||
354 | |||
355 | /* Set the new modes for the terminal. */ | ||
356 | if (tcsetattr(fd, TCSANOW, &tio) < 0) | ||
357 | log("Setting tty modes failed: %.100s", strerror(errno)); | ||
358 | return; | ||
359 | } | ||