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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5260325f | 5 | * Server main loop for handling the interactive session. |
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". | |
12 | * | |
e78a59f5 | 13 | * SSH2 support by Markus Friedl. |
a96070d4 | 14 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 15 | * |
16 | * Redistribution and use in source and binary forms, with or without | |
17 | * modification, are permitted provided that the following conditions | |
18 | * are met: | |
19 | * 1. Redistributions of source code must retain the above copyright | |
20 | * notice, this list of conditions and the following disclaimer. | |
21 | * 2. Redistributions in binary form must reproduce the above copyright | |
22 | * notice, this list of conditions and the following disclaimer in the | |
23 | * documentation and/or other materials provided with the distribution. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
26 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
27 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
28 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
29 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
30 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
34 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
e78a59f5 | 35 | */ |
8efc0c15 | 36 | |
37 | #include "includes.h" | |
7819b5c3 | 38 | RCSID("$OpenBSD: serverloop.c,v 1.93 2001/12/28 15:06:00 markus Exp $"); |
a22aff1f | 39 | |
8efc0c15 | 40 | #include "xmalloc.h" |
8efc0c15 | 41 | #include "packet.h" |
42 | #include "buffer.h" | |
42f11eb2 | 43 | #include "log.h" |
8efc0c15 | 44 | #include "servconf.h" |
1729c161 | 45 | #include "sshpty.h" |
a5efa1bb | 46 | #include "channels.h" |
7368a6c8 | 47 | #include "compat.h" |
42f11eb2 | 48 | #include "ssh1.h" |
e78a59f5 | 49 | #include "ssh2.h" |
59c97189 | 50 | #include "auth.h" |
e78a59f5 | 51 | #include "session.h" |
7368a6c8 | 52 | #include "dispatch.h" |
38c295d6 | 53 | #include "auth-options.h" |
42f11eb2 | 54 | #include "serverloop.h" |
55 | #include "misc.h" | |
7a37c112 | 56 | #include "kex.h" |
8efc0c15 | 57 | |
33de75a3 | 58 | extern ServerOptions options; |
59 | ||
7a37c112 | 60 | /* XXX */ |
61 | extern Kex *xxx_kex; | |
57156994 | 62 | static Authctxt *xxx_authctxt; |
7a37c112 | 63 | |
8efc0c15 | 64 | static Buffer stdin_buffer; /* Buffer for stdin data. */ |
65 | static Buffer stdout_buffer; /* Buffer for stdout data. */ | |
66 | static Buffer stderr_buffer; /* Buffer for stderr data. */ | |
67 | static int fdin; /* Descriptor for stdin (for writing) */ | |
68 | static int fdout; /* Descriptor for stdout (for reading); | |
69 | May be same number as fdin. */ | |
70 | static int fderr; /* Descriptor for stderr. May be -1. */ | |
71 | static long stdin_bytes = 0; /* Number of bytes written to stdin. */ | |
72 | static long stdout_bytes = 0; /* Number of stdout bytes sent to client. */ | |
73 | static long stderr_bytes = 0; /* Number of stderr bytes sent to client. */ | |
74 | static long fdout_bytes = 0; /* Number of stdout bytes read from program. */ | |
75 | static int stdin_eof = 0; /* EOF message received from client. */ | |
76 | static int fdout_eof = 0; /* EOF encountered reading from fdout. */ | |
77 | static int fderr_eof = 0; /* EOF encountered readung from fderr. */ | |
e68225b2 | 78 | static int fdin_is_tty = 0; /* fdin points to a tty. */ |
8efc0c15 | 79 | static int connection_in; /* Connection to client (input). */ |
80 | static int connection_out; /* Connection to client (output). */ | |
cc94bd38 | 81 | static int connection_closed = 0; /* Connection to client closed. */ |
82 | static u_int buffer_high; /* "Soft" max buffer size. */ | |
72176c0e | 83 | static int client_alive_timeouts = 0; |
8efc0c15 | 84 | |
aa3378df | 85 | /* |
86 | * This SIGCHLD kludge is used to detect when the child exits. The server | |
87 | * will exit after that, as soon as forwarded connections have terminated. | |
88 | */ | |
396c147e | 89 | |
7a934d1b | 90 | static volatile sig_atomic_t child_terminated = 0; /* The child has terminated. */ |
8efc0c15 | 91 | |
396c147e | 92 | /* prototypes */ |
93 | static void server_init_dispatch(void); | |
7368a6c8 | 94 | |
a10be357 | 95 | /* |
96 | * we write to this pipe if a SIGCHLD is caught in order to avoid | |
97 | * the race between select() and child_terminated | |
98 | */ | |
99 | static int notify_pipe[2]; | |
100 | static void | |
101 | notify_setup(void) | |
102 | { | |
103 | if (pipe(notify_pipe) < 0) { | |
104 | error("pipe(notify_pipe) failed %s", strerror(errno)); | |
105 | } else if ((fcntl(notify_pipe[0], F_SETFD, 1) == -1) || | |
106 | (fcntl(notify_pipe[1], F_SETFD, 1) == -1)) { | |
107 | error("fcntl(notify_pipe, F_SETFD) failed %s", strerror(errno)); | |
108 | close(notify_pipe[0]); | |
109 | close(notify_pipe[1]); | |
110 | } else { | |
111 | set_nonblock(notify_pipe[0]); | |
112 | set_nonblock(notify_pipe[1]); | |
113 | return; | |
114 | } | |
115 | notify_pipe[0] = -1; /* read end */ | |
116 | notify_pipe[1] = -1; /* write end */ | |
117 | } | |
118 | static void | |
119 | notify_parent(void) | |
120 | { | |
121 | if (notify_pipe[1] != -1) | |
122 | write(notify_pipe[1], "", 1); | |
123 | } | |
124 | static void | |
125 | notify_prepare(fd_set *readset) | |
126 | { | |
127 | if (notify_pipe[0] != -1) | |
128 | FD_SET(notify_pipe[0], readset); | |
129 | } | |
130 | static void | |
131 | notify_done(fd_set *readset) | |
132 | { | |
133 | char c; | |
134 | ||
135 | if (notify_pipe[0] != -1 && FD_ISSET(notify_pipe[0], readset)) | |
136 | while (read(notify_pipe[0], &c, 1) != -1) | |
137 | debug2("notify_done: reading"); | |
138 | } | |
139 | ||
396c147e | 140 | static void |
5260325f | 141 | sigchld_handler(int sig) |
e78a59f5 | 142 | { |
143 | int save_errno = errno; | |
144 | debug("Received SIGCHLD."); | |
145 | child_terminated = 1; | |
c9130033 | 146 | mysignal(SIGCHLD, sigchld_handler); |
a10be357 | 147 | notify_parent(); |
e78a59f5 | 148 | errno = save_errno; |
149 | } | |
8efc0c15 | 150 | |
5260325f | 151 | /* |
152 | * Make packets from buffered stderr data, and buffer it for sending | |
153 | * to the client. | |
154 | */ | |
396c147e | 155 | static void |
5ca51e19 | 156 | make_packets_from_stderr_data(void) |
8efc0c15 | 157 | { |
5260325f | 158 | int len; |
159 | ||
160 | /* Send buffered stderr data to the client. */ | |
161 | while (buffer_len(&stderr_buffer) > 0 && | |
a408af76 | 162 | packet_not_very_much_data_to_write()) { |
5260325f | 163 | len = buffer_len(&stderr_buffer); |
164 | if (packet_is_interactive()) { | |
165 | if (len > 512) | |
166 | len = 512; | |
167 | } else { | |
168 | /* Keep the packets at reasonable size. */ | |
169 | if (len > packet_get_maxsize()) | |
170 | len = packet_get_maxsize(); | |
171 | } | |
172 | packet_start(SSH_SMSG_STDERR_DATA); | |
173 | packet_put_string(buffer_ptr(&stderr_buffer), len); | |
174 | packet_send(); | |
175 | buffer_consume(&stderr_buffer, len); | |
176 | stderr_bytes += len; | |
8efc0c15 | 177 | } |
8efc0c15 | 178 | } |
179 | ||
5260325f | 180 | /* |
181 | * Make packets from buffered stdout data, and buffer it for sending to the | |
182 | * client. | |
183 | */ | |
396c147e | 184 | static void |
5ca51e19 | 185 | make_packets_from_stdout_data(void) |
8efc0c15 | 186 | { |
5260325f | 187 | int len; |
188 | ||
189 | /* Send buffered stdout data to the client. */ | |
190 | while (buffer_len(&stdout_buffer) > 0 && | |
a408af76 | 191 | packet_not_very_much_data_to_write()) { |
5260325f | 192 | len = buffer_len(&stdout_buffer); |
193 | if (packet_is_interactive()) { | |
194 | if (len > 512) | |
195 | len = 512; | |
196 | } else { | |
197 | /* Keep the packets at reasonable size. */ | |
198 | if (len > packet_get_maxsize()) | |
2b87da3b | 199 | len = packet_get_maxsize(); |
5260325f | 200 | } |
201 | packet_start(SSH_SMSG_STDOUT_DATA); | |
202 | packet_put_string(buffer_ptr(&stdout_buffer), len); | |
203 | packet_send(); | |
204 | buffer_consume(&stdout_buffer, len); | |
205 | stdout_bytes += len; | |
8efc0c15 | 206 | } |
8efc0c15 | 207 | } |
208 | ||
72176c0e | 209 | static void |
210 | client_alive_check(void) | |
211 | { | |
212 | int id; | |
213 | ||
214 | /* timeout, check to see how many we have had */ | |
215 | if (++client_alive_timeouts > options.client_alive_count_max) | |
216 | packet_disconnect("Timeout, your session not responding."); | |
217 | ||
218 | id = channel_find_open(); | |
219 | if (id == -1) | |
220 | packet_disconnect("No open channels after timeout!"); | |
221 | /* | |
222 | * send a bogus channel request with "wantreply", | |
223 | * we should get back a failure | |
224 | */ | |
225 | channel_request_start(id, "keepalive@openssh.com", 1); | |
226 | packet_send(); | |
227 | } | |
228 | ||
5260325f | 229 | /* |
230 | * Sleep in select() until we can do something. This will initialize the | |
231 | * select masks. Upon return, the masks will indicate which descriptors | |
232 | * have data or can accept data. Optionally, a maximum time can be specified | |
233 | * for the duration of the wait (0 = infinite). | |
234 | */ | |
396c147e | 235 | static void |
39929cdb | 236 | wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp, |
489aa2e9 | 237 | int *nallocp, u_int max_time_milliseconds) |
8efc0c15 | 238 | { |
5260325f | 239 | struct timeval tv, *tvp; |
240 | int ret; | |
3ffc6336 | 241 | int client_alive_scheduled = 0; |
242 | ||
243 | /* | |
184eed6a | 244 | * if using client_alive, set the max timeout accordingly, |
3ffc6336 | 245 | * and indicate that this particular timeout was for client |
246 | * alive by setting the client_alive_scheduled flag. | |
247 | * | |
248 | * this could be randomized somewhat to make traffic | |
184eed6a | 249 | * analysis more difficult, but we're not doing it yet. |
3ffc6336 | 250 | */ |
2c5b1791 | 251 | if (compat20 && |
252 | max_time_milliseconds == 0 && options.client_alive_interval) { | |
39aefe7b | 253 | client_alive_scheduled = 1; |
3ffc6336 | 254 | max_time_milliseconds = options.client_alive_interval * 1000; |
2c5b1791 | 255 | } |
8efc0c15 | 256 | |
39929cdb | 257 | /* Allocate and update select() masks for channel descriptors. */ |
489aa2e9 | 258 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, 0); |
5260325f | 259 | |
e78a59f5 | 260 | if (compat20) { |
0c139bd1 | 261 | #if 0 |
1d1ffb87 | 262 | /* wrong: bad condition XXX */ |
e78a59f5 | 263 | if (channel_not_very_much_buffered_data()) |
0c139bd1 | 264 | #endif |
265 | FD_SET(connection_in, *readsetp); | |
e78a59f5 | 266 | } else { |
71276795 | 267 | /* |
268 | * Read packets from the client unless we have too much | |
269 | * buffered stdin or channel data. | |
270 | */ | |
271 | if (buffer_len(&stdin_buffer) < buffer_high && | |
e78a59f5 | 272 | channel_not_very_much_buffered_data()) |
39929cdb | 273 | FD_SET(connection_in, *readsetp); |
71276795 | 274 | /* |
275 | * If there is not too much data already buffered going to | |
276 | * the client, try to get some more data from the program. | |
277 | */ | |
278 | if (packet_not_very_much_data_to_write()) { | |
279 | if (!fdout_eof) | |
39929cdb | 280 | FD_SET(fdout, *readsetp); |
71276795 | 281 | if (!fderr_eof) |
39929cdb | 282 | FD_SET(fderr, *readsetp); |
71276795 | 283 | } |
284 | /* | |
285 | * If we have buffered data, try to write some of that data | |
286 | * to the program. | |
287 | */ | |
288 | if (fdin != -1 && buffer_len(&stdin_buffer) > 0) | |
39929cdb | 289 | FD_SET(fdin, *writesetp); |
e78a59f5 | 290 | } |
a10be357 | 291 | notify_prepare(*readsetp); |
5260325f | 292 | |
aa3378df | 293 | /* |
294 | * If we have buffered packet data going to the client, mark that | |
295 | * descriptor. | |
296 | */ | |
5260325f | 297 | if (packet_have_data_to_write()) |
39929cdb | 298 | FD_SET(connection_out, *writesetp); |
5260325f | 299 | |
aa3378df | 300 | /* |
301 | * If child has terminated and there is enough buffer space to read | |
302 | * from it, then read as much as is available and exit. | |
303 | */ | |
5260325f | 304 | if (child_terminated && packet_not_very_much_data_to_write()) |
3ffc6336 | 305 | if (max_time_milliseconds == 0 || client_alive_scheduled) |
5260325f | 306 | max_time_milliseconds = 100; |
307 | ||
308 | if (max_time_milliseconds == 0) | |
309 | tvp = NULL; | |
310 | else { | |
311 | tv.tv_sec = max_time_milliseconds / 1000; | |
312 | tv.tv_usec = 1000 * (max_time_milliseconds % 1000); | |
313 | tvp = &tv; | |
314 | } | |
e78a59f5 | 315 | if (tvp!=NULL) |
010f9726 | 316 | debug3("tvp!=NULL kid %d mili %d", (int) child_terminated, |
317 | max_time_milliseconds); | |
8efc0c15 | 318 | |
5260325f | 319 | /* Wait for something to happen, or the timeout to expire. */ |
39929cdb | 320 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); |
8efc0c15 | 321 | |
3ffc6336 | 322 | if (ret == -1) { |
b3ad8fe6 | 323 | memset(*readsetp, 0, *nallocp); |
324 | memset(*writesetp, 0, *nallocp); | |
5260325f | 325 | if (errno != EINTR) |
326 | error("select: %.100s", strerror(errno)); | |
418e724c | 327 | } else if (ret == 0 && client_alive_scheduled) |
72176c0e | 328 | client_alive_check(); |
a10be357 | 329 | |
330 | notify_done(*readsetp); | |
8efc0c15 | 331 | } |
332 | ||
5260325f | 333 | /* |
334 | * Processes input from the client and the program. Input data is stored | |
335 | * in buffers and processed later. | |
336 | */ | |
396c147e | 337 | static void |
5260325f | 338 | process_input(fd_set * readset) |
339 | { | |
340 | int len; | |
341 | char buf[16384]; | |
342 | ||
343 | /* Read and buffer any input data from the client. */ | |
344 | if (FD_ISSET(connection_in, readset)) { | |
345 | len = read(connection_in, buf, sizeof(buf)); | |
346 | if (len == 0) { | |
347 | verbose("Connection closed by remote host."); | |
cc94bd38 | 348 | connection_closed = 1; |
349 | if (compat20) | |
350 | return; | |
5260325f | 351 | fatal_cleanup(); |
0e73cc53 | 352 | } else if (len < 0) { |
353 | if (errno != EINTR && errno != EAGAIN) { | |
354 | verbose("Read error from remote host: %.100s", strerror(errno)); | |
355 | fatal_cleanup(); | |
356 | } | |
357 | } else { | |
358 | /* Buffer any received data. */ | |
359 | packet_process_incoming(buf, len); | |
5260325f | 360 | } |
5260325f | 361 | } |
e78a59f5 | 362 | if (compat20) |
363 | return; | |
364 | ||
5260325f | 365 | /* Read and buffer any available stdout data from the program. */ |
366 | if (!fdout_eof && FD_ISSET(fdout, readset)) { | |
367 | len = read(fdout, buf, sizeof(buf)); | |
0e73cc53 | 368 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
369 | /* do nothing */ | |
370 | } else if (len <= 0) { | |
5260325f | 371 | fdout_eof = 1; |
0e73cc53 | 372 | } else { |
5260325f | 373 | buffer_append(&stdout_buffer, buf, len); |
374 | fdout_bytes += len; | |
375 | } | |
376 | } | |
377 | /* Read and buffer any available stderr data from the program. */ | |
378 | if (!fderr_eof && FD_ISSET(fderr, readset)) { | |
379 | len = read(fderr, buf, sizeof(buf)); | |
0e73cc53 | 380 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
381 | /* do nothing */ | |
382 | } else if (len <= 0) { | |
5260325f | 383 | fderr_eof = 1; |
0e73cc53 | 384 | } else { |
5260325f | 385 | buffer_append(&stderr_buffer, buf, len); |
0e73cc53 | 386 | } |
5260325f | 387 | } |
388 | } | |
8efc0c15 | 389 | |
5260325f | 390 | /* |
391 | * Sends data from internal buffers to client program stdin. | |
392 | */ | |
396c147e | 393 | static void |
5260325f | 394 | process_output(fd_set * writeset) |
8efc0c15 | 395 | { |
4ef922e3 | 396 | struct termios tio; |
780a9951 | 397 | u_char *data; |
398 | u_int dlen; | |
5260325f | 399 | int len; |
400 | ||
401 | /* Write buffered data to program stdin. */ | |
e78a59f5 | 402 | if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) { |
780a9951 | 403 | data = buffer_ptr(&stdin_buffer); |
404 | dlen = buffer_len(&stdin_buffer); | |
405 | len = write(fdin, data, dlen); | |
0e73cc53 | 406 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
407 | /* do nothing */ | |
408 | } else if (len <= 0) { | |
7368a6c8 | 409 | if (fdin != fdout) |
5260325f | 410 | close(fdin); |
411 | else | |
412 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
5260325f | 413 | fdin = -1; |
414 | } else { | |
4ef922e3 | 415 | /* Successful write. */ |
780a9951 | 416 | if (fdin_is_tty && dlen >= 1 && data[0] != '\r' && |
417 | tcgetattr(fdin, &tio) == 0 && | |
0ae4fe1d | 418 | !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) { |
62da27dd | 419 | /* |
420 | * Simulate echo to reduce the impact of | |
421 | * traffic analysis | |
422 | */ | |
95ce5599 | 423 | packet_send_ignore(len); |
4ef922e3 | 424 | packet_send(); |
425 | } | |
426 | /* Consume the data from the buffer. */ | |
5260325f | 427 | buffer_consume(&stdin_buffer, len); |
428 | /* Update the count of bytes written to the program. */ | |
429 | stdin_bytes += len; | |
430 | } | |
8efc0c15 | 431 | } |
5260325f | 432 | /* Send any buffered packet data to the client. */ |
433 | if (FD_ISSET(connection_out, writeset)) | |
434 | packet_write_poll(); | |
8efc0c15 | 435 | } |
436 | ||
5260325f | 437 | /* |
438 | * Wait until all buffered output has been sent to the client. | |
439 | * This is used when the program terminates. | |
440 | */ | |
396c147e | 441 | static void |
5ca51e19 | 442 | drain_output(void) |
8efc0c15 | 443 | { |
5260325f | 444 | /* Send any buffered stdout data to the client. */ |
445 | if (buffer_len(&stdout_buffer) > 0) { | |
446 | packet_start(SSH_SMSG_STDOUT_DATA); | |
447 | packet_put_string(buffer_ptr(&stdout_buffer), | |
448 | buffer_len(&stdout_buffer)); | |
449 | packet_send(); | |
450 | /* Update the count of sent bytes. */ | |
451 | stdout_bytes += buffer_len(&stdout_buffer); | |
452 | } | |
453 | /* Send any buffered stderr data to the client. */ | |
454 | if (buffer_len(&stderr_buffer) > 0) { | |
455 | packet_start(SSH_SMSG_STDERR_DATA); | |
456 | packet_put_string(buffer_ptr(&stderr_buffer), | |
457 | buffer_len(&stderr_buffer)); | |
458 | packet_send(); | |
459 | /* Update the count of sent bytes. */ | |
460 | stderr_bytes += buffer_len(&stderr_buffer); | |
461 | } | |
462 | /* Wait until all buffered data has been written to the client. */ | |
463 | packet_write_wait(); | |
8efc0c15 | 464 | } |
465 | ||
396c147e | 466 | static void |
5ca51e19 | 467 | process_buffered_input_packets(void) |
7368a6c8 | 468 | { |
7a37c112 | 469 | dispatch_run(DISPATCH_NONBLOCK, NULL, compat20 ? xxx_kex : NULL); |
7368a6c8 | 470 | } |
471 | ||
5260325f | 472 | /* |
473 | * Performs the interactive session. This handles data transmission between | |
474 | * the client and the program. Note that the notion of stdin, stdout, and | |
475 | * stderr in this function is sort of reversed: this function writes to | |
476 | * stdin (of the child program), and reads from stdout and stderr (of the | |
477 | * child program). | |
478 | */ | |
6ae2364d | 479 | void |
9da5c3c9 | 480 | server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) |
8efc0c15 | 481 | { |
39929cdb | 482 | fd_set *readset = NULL, *writeset = NULL; |
489aa2e9 | 483 | int max_fd = 0, nalloc = 0; |
9da5c3c9 | 484 | int wait_status; /* Status returned by wait(). */ |
485 | pid_t wait_pid; /* pid returned by wait(). */ | |
5260325f | 486 | int waiting_termination = 0; /* Have displayed waiting close message. */ |
1e3b8b07 | 487 | u_int max_time_milliseconds; |
488 | u_int previous_stdout_buffer_bytes; | |
489 | u_int stdout_buffer_bytes; | |
5260325f | 490 | int type; |
491 | ||
492 | debug("Entering interactive session."); | |
493 | ||
494 | /* Initialize the SIGCHLD kludge. */ | |
5260325f | 495 | child_terminated = 0; |
42ad0eec | 496 | mysignal(SIGCHLD, sigchld_handler); |
5260325f | 497 | |
498 | /* Initialize our global variables. */ | |
499 | fdin = fdin_arg; | |
500 | fdout = fdout_arg; | |
501 | fderr = fderr_arg; | |
0e73cc53 | 502 | |
503 | /* nonblocking IO */ | |
504 | set_nonblock(fdin); | |
505 | set_nonblock(fdout); | |
ff873e98 | 506 | /* we don't have stderr for interactive terminal sessions, see below */ |
507 | if (fderr != -1) | |
508 | set_nonblock(fderr); | |
0e73cc53 | 509 | |
e68225b2 | 510 | if (!(datafellows & SSH_BUG_IGNOREMSG) && isatty(fdin)) |
511 | fdin_is_tty = 1; | |
512 | ||
5260325f | 513 | connection_in = packet_get_connection_in(); |
514 | connection_out = packet_get_connection_out(); | |
515 | ||
a10be357 | 516 | notify_setup(); |
517 | ||
5260325f | 518 | previous_stdout_buffer_bytes = 0; |
519 | ||
520 | /* Set approximate I/O buffer size. */ | |
521 | if (packet_is_interactive()) | |
522 | buffer_high = 4096; | |
523 | else | |
524 | buffer_high = 64 * 1024; | |
525 | ||
489aa2e9 | 526 | #if 0 |
5260325f | 527 | /* Initialize max_fd to the maximum of the known file descriptors. */ |
489aa2e9 | 528 | max_fd = MAX(connection_in, connection_out); |
529 | max_fd = MAX(max_fd, fdin); | |
530 | max_fd = MAX(max_fd, fdout); | |
39929cdb | 531 | if (fderr != -1) |
532 | max_fd = MAX(max_fd, fderr); | |
489aa2e9 | 533 | #endif |
5260325f | 534 | |
535 | /* Initialize Initialize buffers. */ | |
536 | buffer_init(&stdin_buffer); | |
537 | buffer_init(&stdout_buffer); | |
538 | buffer_init(&stderr_buffer); | |
539 | ||
aa3378df | 540 | /* |
541 | * If we have no separate fderr (which is the case when we have a pty | |
542 | * - there we cannot make difference between data sent to stdout and | |
543 | * stderr), indicate that we have seen an EOF from stderr. This way | |
544 | * we don\'t need to check the descriptor everywhere. | |
545 | */ | |
5260325f | 546 | if (fderr == -1) |
547 | fderr_eof = 1; | |
548 | ||
7368a6c8 | 549 | server_init_dispatch(); |
550 | ||
5260325f | 551 | /* Main loop of the server for the interactive session mode. */ |
552 | for (;;) { | |
5260325f | 553 | |
554 | /* Process buffered packets from the client. */ | |
555 | process_buffered_input_packets(); | |
556 | ||
aa3378df | 557 | /* |
558 | * If we have received eof, and there is no more pending | |
559 | * input data, cause a real eof by closing fdin. | |
560 | */ | |
5260325f | 561 | if (stdin_eof && fdin != -1 && buffer_len(&stdin_buffer) == 0) { |
7368a6c8 | 562 | if (fdin != fdout) |
5260325f | 563 | close(fdin); |
564 | else | |
565 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
5260325f | 566 | fdin = -1; |
567 | } | |
aa3378df | 568 | /* Make packets from buffered stderr data to send to the client. */ |
5260325f | 569 | make_packets_from_stderr_data(); |
570 | ||
aa3378df | 571 | /* |
572 | * Make packets from buffered stdout data to send to the | |
573 | * client. If there is very little to send, this arranges to | |
574 | * not send them now, but to wait a short while to see if we | |
575 | * are getting more data. This is necessary, as some systems | |
576 | * wake up readers from a pty after each separate character. | |
577 | */ | |
5260325f | 578 | max_time_milliseconds = 0; |
579 | stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
580 | if (stdout_buffer_bytes != 0 && stdout_buffer_bytes < 256 && | |
581 | stdout_buffer_bytes != previous_stdout_buffer_bytes) { | |
582 | /* try again after a while */ | |
583 | max_time_milliseconds = 10; | |
584 | } else { | |
585 | /* Send it now. */ | |
586 | make_packets_from_stdout_data(); | |
587 | } | |
588 | previous_stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
589 | ||
590 | /* Send channel data to the client. */ | |
591 | if (packet_not_very_much_data_to_write()) | |
592 | channel_output_poll(); | |
593 | ||
aa3378df | 594 | /* |
595 | * Bail out of the loop if the program has closed its output | |
596 | * descriptors, and we have no more data to send to the | |
597 | * client, and there is no pending buffered data. | |
598 | */ | |
7062c40f | 599 | if (fdout_eof && fderr_eof && !packet_have_data_to_write() && |
600 | buffer_len(&stdout_buffer) == 0 && buffer_len(&stderr_buffer) == 0) { | |
5260325f | 601 | if (!channel_still_open()) |
7368a6c8 | 602 | break; |
5260325f | 603 | if (!waiting_termination) { |
604 | const char *s = "Waiting for forwarded connections to terminate...\r\n"; | |
605 | char *cp; | |
606 | waiting_termination = 1; | |
607 | buffer_append(&stderr_buffer, s, strlen(s)); | |
608 | ||
609 | /* Display list of open channels. */ | |
610 | cp = channel_open_message(); | |
611 | buffer_append(&stderr_buffer, cp, strlen(cp)); | |
612 | xfree(cp); | |
613 | } | |
614 | } | |
489aa2e9 | 615 | max_fd = MAX(connection_in, connection_out); |
616 | max_fd = MAX(max_fd, fdin); | |
617 | max_fd = MAX(max_fd, fdout); | |
618 | max_fd = MAX(max_fd, fderr); | |
a10be357 | 619 | max_fd = MAX(max_fd, notify_pipe[0]); |
489aa2e9 | 620 | |
5260325f | 621 | /* Sleep in select() until we can do something. */ |
39929cdb | 622 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 623 | &nalloc, max_time_milliseconds); |
5260325f | 624 | |
625 | /* Process any channel events. */ | |
39929cdb | 626 | channel_after_select(readset, writeset); |
5260325f | 627 | |
628 | /* Process input from the client and from program stdout/stderr. */ | |
39929cdb | 629 | process_input(readset); |
5260325f | 630 | |
631 | /* Process output to the client and to program stdin. */ | |
39929cdb | 632 | process_output(writeset); |
8efc0c15 | 633 | } |
39929cdb | 634 | if (readset) |
635 | xfree(readset); | |
636 | if (writeset) | |
637 | xfree(writeset); | |
8efc0c15 | 638 | |
5260325f | 639 | /* Cleanup and termination code. */ |
8efc0c15 | 640 | |
5260325f | 641 | /* Wait until all output has been sent to the client. */ |
642 | drain_output(); | |
8efc0c15 | 643 | |
5260325f | 644 | debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.", |
184eed6a | 645 | stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes); |
8efc0c15 | 646 | |
5260325f | 647 | /* Free and clear the buffers. */ |
648 | buffer_free(&stdin_buffer); | |
649 | buffer_free(&stdout_buffer); | |
650 | buffer_free(&stderr_buffer); | |
8efc0c15 | 651 | |
5260325f | 652 | /* Close the file descriptors. */ |
653 | if (fdout != -1) | |
654 | close(fdout); | |
655 | fdout = -1; | |
656 | fdout_eof = 1; | |
657 | if (fderr != -1) | |
658 | close(fderr); | |
659 | fderr = -1; | |
660 | fderr_eof = 1; | |
661 | if (fdin != -1) | |
662 | close(fdin); | |
663 | fdin = -1; | |
664 | ||
d6746a0b | 665 | channel_free_all(); |
5260325f | 666 | |
5260325f | 667 | /* We no longer want our SIGCHLD handler to be called. */ |
42ad0eec | 668 | mysignal(SIGCHLD, SIG_DFL); |
5260325f | 669 | |
c9130033 | 670 | wait_pid = waitpid(-1, &wait_status, child_terminated ? WNOHANG : 0); |
671 | if (wait_pid == -1) | |
672 | packet_disconnect("wait: %.100s", strerror(errno)); | |
673 | else if (wait_pid != pid) | |
674 | error("Strange, wait returned pid %d, expected %d", | |
675 | wait_pid, pid); | |
676 | ||
5260325f | 677 | /* Check if it exited normally. */ |
678 | if (WIFEXITED(wait_status)) { | |
679 | /* Yes, normal exit. Get exit status and send it to the client. */ | |
680 | debug("Command exited with status %d.", WEXITSTATUS(wait_status)); | |
681 | packet_start(SSH_SMSG_EXITSTATUS); | |
682 | packet_put_int(WEXITSTATUS(wait_status)); | |
683 | packet_send(); | |
684 | packet_write_wait(); | |
685 | ||
aa3378df | 686 | /* |
687 | * Wait for exit confirmation. Note that there might be | |
688 | * other packets coming before it; however, the program has | |
689 | * already died so we just ignore them. The client is | |
690 | * supposed to respond with the confirmation when it receives | |
691 | * the exit status. | |
692 | */ | |
5260325f | 693 | do { |
54a5250f | 694 | type = packet_read(); |
5260325f | 695 | } |
696 | while (type != SSH_CMSG_EXIT_CONFIRMATION); | |
697 | ||
698 | debug("Received exit confirmation."); | |
699 | return; | |
700 | } | |
701 | /* Check if the program terminated due to a signal. */ | |
702 | if (WIFSIGNALED(wait_status)) | |
703 | packet_disconnect("Command terminated on signal %d.", | |
704 | WTERMSIG(wait_status)); | |
705 | ||
706 | /* Some weird exit cause. Just exit. */ | |
707 | packet_disconnect("wait returned status %04x.", wait_status); | |
708 | /* NOTREACHED */ | |
709 | } | |
7368a6c8 | 710 | |
418e724c | 711 | static void |
712 | collect_children(void) | |
713 | { | |
714 | pid_t pid; | |
715 | sigset_t oset, nset; | |
716 | int status; | |
717 | ||
718 | /* block SIGCHLD while we check for dead children */ | |
719 | sigemptyset(&nset); | |
720 | sigaddset(&nset, SIGCHLD); | |
721 | sigprocmask(SIG_BLOCK, &nset, &oset); | |
722 | if (child_terminated) { | |
723 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) | |
724 | session_close_by_pid(pid, status); | |
725 | child_terminated = 0; | |
726 | } | |
727 | sigprocmask(SIG_SETMASK, &oset, NULL); | |
728 | } | |
729 | ||
6ae2364d | 730 | void |
57156994 | 731 | server_loop2(Authctxt *authctxt) |
e78a59f5 | 732 | { |
39929cdb | 733 | fd_set *readset = NULL, *writeset = NULL; |
418e724c | 734 | int rekeying = 0, max_fd, nalloc = 0; |
e78a59f5 | 735 | |
736 | debug("Entering interactive session for SSH2."); | |
737 | ||
c9130033 | 738 | mysignal(SIGCHLD, sigchld_handler); |
e78a59f5 | 739 | child_terminated = 0; |
740 | connection_in = packet_get_connection_in(); | |
741 | connection_out = packet_get_connection_out(); | |
39929cdb | 742 | |
a10be357 | 743 | notify_setup(); |
744 | ||
39929cdb | 745 | max_fd = MAX(connection_in, connection_out); |
a10be357 | 746 | max_fd = MAX(max_fd, notify_pipe[0]); |
747 | ||
57156994 | 748 | xxx_authctxt = authctxt; |
39929cdb | 749 | |
e78a59f5 | 750 | server_init_dispatch(); |
751 | ||
752 | for (;;) { | |
753 | process_buffered_input_packets(); | |
bbb4cc1b | 754 | |
cd332296 | 755 | rekeying = (xxx_kex != NULL && !xxx_kex->done); |
bbb4cc1b | 756 | |
bbb4cc1b | 757 | if (!rekeying && packet_not_very_much_data_to_write()) |
e78a59f5 | 758 | channel_output_poll(); |
bbb4cc1b | 759 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 760 | &nalloc, 0); |
d5f24f94 | 761 | |
418e724c | 762 | collect_children(); |
bbb4cc1b | 763 | if (!rekeying) |
764 | channel_after_select(readset, writeset); | |
39929cdb | 765 | process_input(readset); |
cc94bd38 | 766 | if (connection_closed) |
767 | break; | |
39929cdb | 768 | process_output(writeset); |
e78a59f5 | 769 | } |
418e724c | 770 | collect_children(); |
771 | ||
39929cdb | 772 | if (readset) |
773 | xfree(readset); | |
774 | if (writeset) | |
775 | xfree(writeset); | |
776 | ||
d5f24f94 | 777 | /* free all channels, no more reads and writes */ |
778 | channel_free_all(); | |
5b5d170c | 779 | |
418e724c | 780 | /* free remaining sessions, e.g. remove wtmp entries */ |
781 | session_destroy_all(); | |
e78a59f5 | 782 | } |
783 | ||
396c147e | 784 | static void |
7819b5c3 | 785 | server_input_channel_failure(int type, u_int32_t seq, void *ctxt) |
3ffc6336 | 786 | { |
787 | debug("Got CHANNEL_FAILURE for keepalive"); | |
184eed6a | 788 | /* |
39aefe7b | 789 | * reset timeout, since we got a sane answer from the client. |
3ffc6336 | 790 | * even if this was generated by something other than |
791 | * the bogus CHANNEL_REQUEST we send for keepalives. | |
792 | */ | |
184eed6a | 793 | client_alive_timeouts = 0; |
3ffc6336 | 794 | } |
795 | ||
796 | ||
396c147e | 797 | static void |
7819b5c3 | 798 | server_input_stdin_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 799 | { |
800 | char *data; | |
1e3b8b07 | 801 | u_int data_len; |
7368a6c8 | 802 | |
803 | /* Stdin data from the client. Append it to the buffer. */ | |
804 | /* Ignore any data if the client has closed stdin. */ | |
805 | if (fdin == -1) | |
806 | return; | |
807 | data = packet_get_string(&data_len); | |
95500969 | 808 | packet_check_eom(); |
7368a6c8 | 809 | buffer_append(&stdin_buffer, data, data_len); |
810 | memset(data, 0, data_len); | |
811 | xfree(data); | |
812 | } | |
813 | ||
396c147e | 814 | static void |
7819b5c3 | 815 | server_input_eof(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 816 | { |
817 | /* | |
818 | * Eof from the client. The stdin descriptor to the | |
819 | * program will be closed when all buffered data has | |
820 | * drained. | |
821 | */ | |
822 | debug("EOF received for stdin."); | |
95500969 | 823 | packet_check_eom(); |
7368a6c8 | 824 | stdin_eof = 1; |
825 | } | |
826 | ||
396c147e | 827 | static void |
7819b5c3 | 828 | server_input_window_size(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 829 | { |
830 | int row = packet_get_int(); | |
831 | int col = packet_get_int(); | |
832 | int xpixel = packet_get_int(); | |
833 | int ypixel = packet_get_int(); | |
834 | ||
835 | debug("Window change received."); | |
95500969 | 836 | packet_check_eom(); |
7368a6c8 | 837 | if (fdin != -1) |
838 | pty_change_window_size(fdin, row, col, xpixel, ypixel); | |
839 | } | |
840 | ||
396c147e | 841 | static Channel * |
fa08c86b | 842 | server_request_direct_tcpip(char *ctype) |
e78a59f5 | 843 | { |
719fc62f | 844 | Channel *c; |
845 | int sock; | |
6ae2364d | 846 | char *target, *originator; |
847 | int target_port, originator_port; | |
e78a59f5 | 848 | |
6ae2364d | 849 | target = packet_get_string(NULL); |
850 | target_port = packet_get_int(); | |
e78a59f5 | 851 | originator = packet_get_string(NULL); |
852 | originator_port = packet_get_int(); | |
95500969 | 853 | packet_check_eom(); |
71276795 | 854 | |
fa08c86b | 855 | debug("server_request_direct_tcpip: originator %s port %d, target %s port %d", |
71276795 | 856 | originator, originator_port, target, target_port); |
38c295d6 | 857 | |
e78a59f5 | 858 | /* XXX check permission */ |
6ae2364d | 859 | sock = channel_connect_to(target, target_port); |
860 | xfree(target); | |
e78a59f5 | 861 | xfree(originator); |
862 | if (sock < 0) | |
fa08c86b | 863 | return NULL; |
719fc62f | 864 | c = channel_new(ctype, SSH_CHANNEL_CONNECTING, |
bcbf86ec | 865 | sock, sock, -1, CHAN_TCP_WINDOW_DEFAULT, |
a22aff1f | 866 | CHAN_TCP_PACKET_DEFAULT, 0, xstrdup("direct-tcpip"), 1); |
719fc62f | 867 | if (c == NULL) { |
868 | error("server_request_direct_tcpip: channel_new failed"); | |
869 | close(sock); | |
870 | } | |
871 | return c; | |
fa08c86b | 872 | } |
873 | ||
396c147e | 874 | static Channel * |
fa08c86b | 875 | server_request_session(char *ctype) |
876 | { | |
719fc62f | 877 | Channel *c; |
fa08c86b | 878 | |
879 | debug("input_session_request"); | |
95500969 | 880 | packet_check_eom(); |
fa08c86b | 881 | /* |
882 | * A server session has no fd to read or write until a | |
883 | * CHANNEL_REQUEST for a shell is made, so we set the type to | |
884 | * SSH_CHANNEL_LARVAL. Additionally, a callback for handling all | |
885 | * CHANNEL_REQUEST messages is registered. | |
886 | */ | |
719fc62f | 887 | c = channel_new(ctype, SSH_CHANNEL_LARVAL, |
888 | -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT, | |
fa08c86b | 889 | 0, xstrdup("server-session"), 1); |
719fc62f | 890 | if (c == NULL) { |
891 | error("server_request_session: channel_new failed"); | |
892 | return NULL; | |
893 | } | |
57156994 | 894 | if (session_open(xxx_authctxt, c->self) != 1) { |
719fc62f | 895 | debug("session open failed, free channel %d", c->self); |
896 | channel_free(c); | |
897 | return NULL; | |
fa08c86b | 898 | } |
719fc62f | 899 | channel_register_callback(c->self, SSH2_MSG_CHANNEL_REQUEST, |
900 | session_input_channel_req, (void *)0); | |
901 | channel_register_cleanup(c->self, session_close_by_channel); | |
902 | return c; | |
e78a59f5 | 903 | } |
904 | ||
396c147e | 905 | static void |
7819b5c3 | 906 | server_input_channel_open(int type, u_int32_t seq, void *ctxt) |
e78a59f5 | 907 | { |
908 | Channel *c = NULL; | |
909 | char *ctype; | |
1e3b8b07 | 910 | u_int len; |
e78a59f5 | 911 | int rchan; |
912 | int rmaxpack; | |
913 | int rwindow; | |
914 | ||
915 | ctype = packet_get_string(&len); | |
916 | rchan = packet_get_int(); | |
917 | rwindow = packet_get_int(); | |
918 | rmaxpack = packet_get_int(); | |
919 | ||
188adeb2 | 920 | debug("server_input_channel_open: ctype %s rchan %d win %d max %d", |
e78a59f5 | 921 | ctype, rchan, rwindow, rmaxpack); |
922 | ||
923 | if (strcmp(ctype, "session") == 0) { | |
fa08c86b | 924 | c = server_request_session(ctype); |
e78a59f5 | 925 | } else if (strcmp(ctype, "direct-tcpip") == 0) { |
fa08c86b | 926 | c = server_request_direct_tcpip(ctype); |
e78a59f5 | 927 | } |
928 | if (c != NULL) { | |
fa08c86b | 929 | debug("server_input_channel_open: confirm %s", ctype); |
e78a59f5 | 930 | c->remote_id = rchan; |
931 | c->remote_window = rwindow; | |
932 | c->remote_maxpacket = rmaxpack; | |
d18e0850 | 933 | if (c->type != SSH_CHANNEL_CONNECTING) { |
934 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
935 | packet_put_int(c->remote_id); | |
936 | packet_put_int(c->self); | |
937 | packet_put_int(c->local_window); | |
938 | packet_put_int(c->local_maxpacket); | |
939 | packet_send(); | |
940 | } | |
e78a59f5 | 941 | } else { |
fa08c86b | 942 | debug("server_input_channel_open: failure %s", ctype); |
e78a59f5 | 943 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); |
944 | packet_put_int(rchan); | |
945 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 946 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
d18e0850 | 947 | packet_put_cstring("open failed"); |
fbe90f7b | 948 | packet_put_cstring(""); |
949 | } | |
e78a59f5 | 950 | packet_send(); |
951 | } | |
952 | xfree(ctype); | |
953 | } | |
954 | ||
396c147e | 955 | static void |
7819b5c3 | 956 | server_input_global_request(int type, u_int32_t seq, void *ctxt) |
fa08c86b | 957 | { |
958 | char *rtype; | |
959 | int want_reply; | |
960 | int success = 0; | |
961 | ||
962 | rtype = packet_get_string(NULL); | |
963 | want_reply = packet_get_char(); | |
964 | debug("server_input_global_request: rtype %s want_reply %d", rtype, want_reply); | |
2b87da3b | 965 | |
01794848 | 966 | /* -R style forwarding */ |
fa08c86b | 967 | if (strcmp(rtype, "tcpip-forward") == 0) { |
968 | struct passwd *pw; | |
969 | char *listen_address; | |
970 | u_short listen_port; | |
971 | ||
972 | pw = auth_get_user(); | |
973 | if (pw == NULL) | |
974 | fatal("server_input_global_request: no user"); | |
975 | listen_address = packet_get_string(NULL); /* XXX currently ignored */ | |
976 | listen_port = (u_short)packet_get_int(); | |
977 | debug("server_input_global_request: tcpip-forward listen %s port %d", | |
978 | listen_address, listen_port); | |
979 | ||
980 | /* check permissions */ | |
981 | if (!options.allow_tcp_forwarding || | |
982 | no_port_forwarding_flag || | |
983 | (listen_port < IPPORT_RESERVED && pw->pw_uid != 0)) { | |
984 | success = 0; | |
985 | packet_send_debug("Server has disabled port forwarding."); | |
986 | } else { | |
987 | /* Start listening on the port */ | |
02a024dd | 988 | success = channel_request_forwarding( |
fa08c86b | 989 | listen_address, listen_port, |
990 | /*unspec host_to_connect*/ "<unspec host>", | |
991 | /*unspec port_to_connect*/ 0, | |
992 | options.gateway_ports, /*remote*/ 1); | |
fa08c86b | 993 | } |
994 | xfree(listen_address); | |
995 | } | |
996 | if (want_reply) { | |
997 | packet_start(success ? | |
998 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
999 | packet_send(); | |
1000 | packet_write_wait(); | |
1001 | } | |
1002 | xfree(rtype); | |
1003 | } | |
1004 | ||
396c147e | 1005 | static void |
5ca51e19 | 1006 | server_init_dispatch_20(void) |
e78a59f5 | 1007 | { |
1008 | debug("server_init_dispatch_20"); | |
1009 | dispatch_init(&dispatch_protocol_error); | |
1010 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); | |
1011 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
1012 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
1013 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
1014 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &server_input_channel_open); | |
1015 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
1016 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1017 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &channel_input_channel_request); | |
1018 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); | |
fa08c86b | 1019 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request); |
3ffc6336 | 1020 | /* client_alive */ |
1021 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_channel_failure); | |
7a37c112 | 1022 | /* rekeying */ |
1023 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e78a59f5 | 1024 | } |
396c147e | 1025 | static void |
5ca51e19 | 1026 | server_init_dispatch_13(void) |
7368a6c8 | 1027 | { |
1028 | debug("server_init_dispatch_13"); | |
1029 | dispatch_init(NULL); | |
1030 | dispatch_set(SSH_CMSG_EOF, &server_input_eof); | |
1031 | dispatch_set(SSH_CMSG_STDIN_DATA, &server_input_stdin_data); | |
1032 | dispatch_set(SSH_CMSG_WINDOW_SIZE, &server_input_window_size); | |
1033 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
1034 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
1035 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
1036 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
1037 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1038 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
1039 | } | |
396c147e | 1040 | static void |
5ca51e19 | 1041 | server_init_dispatch_15(void) |
7368a6c8 | 1042 | { |
1043 | server_init_dispatch_13(); | |
1044 | debug("server_init_dispatch_15"); | |
1045 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
1046 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_oclose); | |
1047 | } | |
396c147e | 1048 | static void |
5ca51e19 | 1049 | server_init_dispatch(void) |
7368a6c8 | 1050 | { |
e78a59f5 | 1051 | if (compat20) |
1052 | server_init_dispatch_20(); | |
1053 | else if (compat13) | |
7368a6c8 | 1054 | server_init_dispatch_13(); |
1055 | else | |
1056 | server_init_dispatch_15(); | |
1057 | } |