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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" | |
489aa2e9 | 38 | RCSID("$OpenBSD: serverloop.c,v 1.76 2001/07/17 21:04:58 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. */ | |
8efc0c15 | 83 | |
aa3378df | 84 | /* |
85 | * This SIGCHLD kludge is used to detect when the child exits. The server | |
86 | * will exit after that, as soon as forwarded connections have terminated. | |
87 | */ | |
396c147e | 88 | |
8efc0c15 | 89 | static volatile int child_terminated; /* The child has terminated. */ |
8efc0c15 | 90 | |
396c147e | 91 | /* prototypes */ |
92 | static void server_init_dispatch(void); | |
7368a6c8 | 93 | |
3ffc6336 | 94 | int client_alive_timeouts = 0; |
95 | ||
396c147e | 96 | static void |
5260325f | 97 | sigchld_handler(int sig) |
e78a59f5 | 98 | { |
99 | int save_errno = errno; | |
100 | debug("Received SIGCHLD."); | |
101 | child_terminated = 1; | |
c9130033 | 102 | mysignal(SIGCHLD, sigchld_handler); |
e78a59f5 | 103 | errno = save_errno; |
104 | } | |
8efc0c15 | 105 | |
5260325f | 106 | /* |
107 | * Make packets from buffered stderr data, and buffer it for sending | |
108 | * to the client. | |
109 | */ | |
396c147e | 110 | static void |
5ca51e19 | 111 | make_packets_from_stderr_data(void) |
8efc0c15 | 112 | { |
5260325f | 113 | int len; |
114 | ||
115 | /* Send buffered stderr data to the client. */ | |
116 | while (buffer_len(&stderr_buffer) > 0 && | |
a408af76 | 117 | packet_not_very_much_data_to_write()) { |
5260325f | 118 | len = buffer_len(&stderr_buffer); |
119 | if (packet_is_interactive()) { | |
120 | if (len > 512) | |
121 | len = 512; | |
122 | } else { | |
123 | /* Keep the packets at reasonable size. */ | |
124 | if (len > packet_get_maxsize()) | |
125 | len = packet_get_maxsize(); | |
126 | } | |
127 | packet_start(SSH_SMSG_STDERR_DATA); | |
128 | packet_put_string(buffer_ptr(&stderr_buffer), len); | |
129 | packet_send(); | |
130 | buffer_consume(&stderr_buffer, len); | |
131 | stderr_bytes += len; | |
8efc0c15 | 132 | } |
8efc0c15 | 133 | } |
134 | ||
5260325f | 135 | /* |
136 | * Make packets from buffered stdout data, and buffer it for sending to the | |
137 | * client. | |
138 | */ | |
396c147e | 139 | static void |
5ca51e19 | 140 | make_packets_from_stdout_data(void) |
8efc0c15 | 141 | { |
5260325f | 142 | int len; |
143 | ||
144 | /* Send buffered stdout data to the client. */ | |
145 | while (buffer_len(&stdout_buffer) > 0 && | |
a408af76 | 146 | packet_not_very_much_data_to_write()) { |
5260325f | 147 | len = buffer_len(&stdout_buffer); |
148 | if (packet_is_interactive()) { | |
149 | if (len > 512) | |
150 | len = 512; | |
151 | } else { | |
152 | /* Keep the packets at reasonable size. */ | |
153 | if (len > packet_get_maxsize()) | |
2b87da3b | 154 | len = packet_get_maxsize(); |
5260325f | 155 | } |
156 | packet_start(SSH_SMSG_STDOUT_DATA); | |
157 | packet_put_string(buffer_ptr(&stdout_buffer), len); | |
158 | packet_send(); | |
159 | buffer_consume(&stdout_buffer, len); | |
160 | stdout_bytes += len; | |
8efc0c15 | 161 | } |
8efc0c15 | 162 | } |
163 | ||
5260325f | 164 | /* |
165 | * Sleep in select() until we can do something. This will initialize the | |
166 | * select masks. Upon return, the masks will indicate which descriptors | |
167 | * have data or can accept data. Optionally, a maximum time can be specified | |
168 | * for the duration of the wait (0 = infinite). | |
169 | */ | |
396c147e | 170 | static void |
39929cdb | 171 | wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp, |
489aa2e9 | 172 | int *nallocp, u_int max_time_milliseconds) |
8efc0c15 | 173 | { |
5260325f | 174 | struct timeval tv, *tvp; |
175 | int ret; | |
3ffc6336 | 176 | int client_alive_scheduled = 0; |
177 | ||
178 | /* | |
179 | * if using client_alive, set the max timeout accordingly, | |
180 | * and indicate that this particular timeout was for client | |
181 | * alive by setting the client_alive_scheduled flag. | |
182 | * | |
183 | * this could be randomized somewhat to make traffic | |
184 | * analysis more difficult, but we're not doing it yet. | |
185 | */ | |
2c5b1791 | 186 | if (compat20 && |
187 | max_time_milliseconds == 0 && options.client_alive_interval) { | |
39aefe7b | 188 | client_alive_scheduled = 1; |
3ffc6336 | 189 | max_time_milliseconds = options.client_alive_interval * 1000; |
2c5b1791 | 190 | } |
8efc0c15 | 191 | |
5260325f | 192 | /* When select fails we restart from here. */ |
8efc0c15 | 193 | retry_select: |
194 | ||
39929cdb | 195 | /* Allocate and update select() masks for channel descriptors. */ |
489aa2e9 | 196 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, 0); |
5260325f | 197 | |
e78a59f5 | 198 | if (compat20) { |
1d1ffb87 | 199 | /* wrong: bad condition XXX */ |
e78a59f5 | 200 | if (channel_not_very_much_buffered_data()) |
39929cdb | 201 | FD_SET(connection_in, *readsetp); |
e78a59f5 | 202 | } else { |
71276795 | 203 | /* |
204 | * Read packets from the client unless we have too much | |
205 | * buffered stdin or channel data. | |
206 | */ | |
207 | if (buffer_len(&stdin_buffer) < buffer_high && | |
e78a59f5 | 208 | channel_not_very_much_buffered_data()) |
39929cdb | 209 | FD_SET(connection_in, *readsetp); |
71276795 | 210 | /* |
211 | * If there is not too much data already buffered going to | |
212 | * the client, try to get some more data from the program. | |
213 | */ | |
214 | if (packet_not_very_much_data_to_write()) { | |
215 | if (!fdout_eof) | |
39929cdb | 216 | FD_SET(fdout, *readsetp); |
71276795 | 217 | if (!fderr_eof) |
39929cdb | 218 | FD_SET(fderr, *readsetp); |
71276795 | 219 | } |
220 | /* | |
221 | * If we have buffered data, try to write some of that data | |
222 | * to the program. | |
223 | */ | |
224 | if (fdin != -1 && buffer_len(&stdin_buffer) > 0) | |
39929cdb | 225 | FD_SET(fdin, *writesetp); |
e78a59f5 | 226 | } |
5260325f | 227 | |
aa3378df | 228 | /* |
229 | * If we have buffered packet data going to the client, mark that | |
230 | * descriptor. | |
231 | */ | |
5260325f | 232 | if (packet_have_data_to_write()) |
39929cdb | 233 | FD_SET(connection_out, *writesetp); |
5260325f | 234 | |
aa3378df | 235 | /* |
236 | * If child has terminated and there is enough buffer space to read | |
237 | * from it, then read as much as is available and exit. | |
238 | */ | |
5260325f | 239 | if (child_terminated && packet_not_very_much_data_to_write()) |
3ffc6336 | 240 | if (max_time_milliseconds == 0 || client_alive_scheduled) |
5260325f | 241 | max_time_milliseconds = 100; |
242 | ||
243 | if (max_time_milliseconds == 0) | |
244 | tvp = NULL; | |
245 | else { | |
246 | tv.tv_sec = max_time_milliseconds / 1000; | |
247 | tv.tv_usec = 1000 * (max_time_milliseconds % 1000); | |
248 | tvp = &tv; | |
249 | } | |
e78a59f5 | 250 | if (tvp!=NULL) |
19d57054 | 251 | debug3("tvp!=NULL kid %d mili %d", child_terminated, max_time_milliseconds); |
8efc0c15 | 252 | |
5260325f | 253 | /* Wait for something to happen, or the timeout to expire. */ |
39929cdb | 254 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); |
8efc0c15 | 255 | |
3ffc6336 | 256 | if (ret == -1) { |
5260325f | 257 | if (errno != EINTR) |
258 | error("select: %.100s", strerror(errno)); | |
259 | else | |
260 | goto retry_select; | |
8efc0c15 | 261 | } |
3ffc6336 | 262 | if (ret == 0 && client_alive_scheduled) { |
263 | /* timeout, check to see how many we have had */ | |
264 | client_alive_timeouts++; | |
265 | ||
266 | if (client_alive_timeouts > options.client_alive_count_max ) { | |
267 | packet_disconnect( | |
268 | "Timeout, your session not responding."); | |
269 | } else { | |
270 | /* | |
271 | * send a bogus channel request with "wantreply" | |
272 | * we should get back a failure | |
273 | */ | |
274 | int id; | |
275 | ||
276 | id = channel_find_open(); | |
277 | if (id != -1) { | |
278 | channel_request_start(id, | |
279 | "keepalive@openssh.com", 1); | |
280 | packet_send(); | |
281 | } else | |
282 | packet_disconnect( | |
283 | "No open channels after timeout!"); | |
284 | } | |
285 | } | |
8efc0c15 | 286 | } |
287 | ||
5260325f | 288 | /* |
289 | * Processes input from the client and the program. Input data is stored | |
290 | * in buffers and processed later. | |
291 | */ | |
396c147e | 292 | static void |
5260325f | 293 | process_input(fd_set * readset) |
294 | { | |
295 | int len; | |
296 | char buf[16384]; | |
297 | ||
298 | /* Read and buffer any input data from the client. */ | |
299 | if (FD_ISSET(connection_in, readset)) { | |
300 | len = read(connection_in, buf, sizeof(buf)); | |
301 | if (len == 0) { | |
302 | verbose("Connection closed by remote host."); | |
cc94bd38 | 303 | connection_closed = 1; |
304 | if (compat20) | |
305 | return; | |
5260325f | 306 | fatal_cleanup(); |
0e73cc53 | 307 | } else if (len < 0) { |
308 | if (errno != EINTR && errno != EAGAIN) { | |
309 | verbose("Read error from remote host: %.100s", strerror(errno)); | |
310 | fatal_cleanup(); | |
311 | } | |
312 | } else { | |
313 | /* Buffer any received data. */ | |
314 | packet_process_incoming(buf, len); | |
5260325f | 315 | } |
5260325f | 316 | } |
e78a59f5 | 317 | if (compat20) |
318 | return; | |
319 | ||
5260325f | 320 | /* Read and buffer any available stdout data from the program. */ |
321 | if (!fdout_eof && FD_ISSET(fdout, readset)) { | |
322 | len = read(fdout, buf, sizeof(buf)); | |
0e73cc53 | 323 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
324 | /* do nothing */ | |
325 | } else if (len <= 0) { | |
5260325f | 326 | fdout_eof = 1; |
0e73cc53 | 327 | } else { |
5260325f | 328 | buffer_append(&stdout_buffer, buf, len); |
329 | fdout_bytes += len; | |
330 | } | |
331 | } | |
332 | /* Read and buffer any available stderr data from the program. */ | |
333 | if (!fderr_eof && FD_ISSET(fderr, readset)) { | |
334 | len = read(fderr, buf, sizeof(buf)); | |
0e73cc53 | 335 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
336 | /* do nothing */ | |
337 | } else if (len <= 0) { | |
5260325f | 338 | fderr_eof = 1; |
0e73cc53 | 339 | } else { |
5260325f | 340 | buffer_append(&stderr_buffer, buf, len); |
0e73cc53 | 341 | } |
5260325f | 342 | } |
343 | } | |
8efc0c15 | 344 | |
5260325f | 345 | /* |
346 | * Sends data from internal buffers to client program stdin. | |
347 | */ | |
396c147e | 348 | static void |
5260325f | 349 | process_output(fd_set * writeset) |
8efc0c15 | 350 | { |
4ef922e3 | 351 | struct termios tio; |
5260325f | 352 | int len; |
353 | ||
354 | /* Write buffered data to program stdin. */ | |
e78a59f5 | 355 | if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) { |
5260325f | 356 | len = write(fdin, buffer_ptr(&stdin_buffer), |
a408af76 | 357 | buffer_len(&stdin_buffer)); |
0e73cc53 | 358 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
359 | /* do nothing */ | |
360 | } else if (len <= 0) { | |
8efc0c15 | 361 | #ifdef USE_PIPES |
5260325f | 362 | close(fdin); |
8efc0c15 | 363 | #else |
7368a6c8 | 364 | if (fdin != fdout) |
5260325f | 365 | close(fdin); |
366 | else | |
367 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
8efc0c15 | 368 | #endif |
5260325f | 369 | fdin = -1; |
370 | } else { | |
4ef922e3 | 371 | /* Successful write. */ |
e68225b2 | 372 | if (fdin_is_tty && tcgetattr(fdin, &tio) == 0 && |
0ae4fe1d | 373 | !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) { |
62da27dd | 374 | /* |
375 | * Simulate echo to reduce the impact of | |
376 | * traffic analysis | |
377 | */ | |
95ce5599 | 378 | packet_send_ignore(len); |
4ef922e3 | 379 | packet_send(); |
380 | } | |
381 | /* Consume the data from the buffer. */ | |
5260325f | 382 | buffer_consume(&stdin_buffer, len); |
383 | /* Update the count of bytes written to the program. */ | |
384 | stdin_bytes += len; | |
385 | } | |
8efc0c15 | 386 | } |
5260325f | 387 | /* Send any buffered packet data to the client. */ |
388 | if (FD_ISSET(connection_out, writeset)) | |
389 | packet_write_poll(); | |
8efc0c15 | 390 | } |
391 | ||
5260325f | 392 | /* |
393 | * Wait until all buffered output has been sent to the client. | |
394 | * This is used when the program terminates. | |
395 | */ | |
396c147e | 396 | static void |
5ca51e19 | 397 | drain_output(void) |
8efc0c15 | 398 | { |
5260325f | 399 | /* Send any buffered stdout data to the client. */ |
400 | if (buffer_len(&stdout_buffer) > 0) { | |
401 | packet_start(SSH_SMSG_STDOUT_DATA); | |
402 | packet_put_string(buffer_ptr(&stdout_buffer), | |
403 | buffer_len(&stdout_buffer)); | |
404 | packet_send(); | |
405 | /* Update the count of sent bytes. */ | |
406 | stdout_bytes += buffer_len(&stdout_buffer); | |
407 | } | |
408 | /* Send any buffered stderr data to the client. */ | |
409 | if (buffer_len(&stderr_buffer) > 0) { | |
410 | packet_start(SSH_SMSG_STDERR_DATA); | |
411 | packet_put_string(buffer_ptr(&stderr_buffer), | |
412 | buffer_len(&stderr_buffer)); | |
413 | packet_send(); | |
414 | /* Update the count of sent bytes. */ | |
415 | stderr_bytes += buffer_len(&stderr_buffer); | |
416 | } | |
417 | /* Wait until all buffered data has been written to the client. */ | |
418 | packet_write_wait(); | |
8efc0c15 | 419 | } |
420 | ||
396c147e | 421 | static void |
5ca51e19 | 422 | process_buffered_input_packets(void) |
7368a6c8 | 423 | { |
7a37c112 | 424 | dispatch_run(DISPATCH_NONBLOCK, NULL, compat20 ? xxx_kex : NULL); |
7368a6c8 | 425 | } |
426 | ||
5260325f | 427 | /* |
428 | * Performs the interactive session. This handles data transmission between | |
429 | * the client and the program. Note that the notion of stdin, stdout, and | |
430 | * stderr in this function is sort of reversed: this function writes to | |
431 | * stdin (of the child program), and reads from stdout and stderr (of the | |
432 | * child program). | |
433 | */ | |
6ae2364d | 434 | void |
9da5c3c9 | 435 | server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) |
8efc0c15 | 436 | { |
39929cdb | 437 | fd_set *readset = NULL, *writeset = NULL; |
489aa2e9 | 438 | int max_fd = 0, nalloc = 0; |
9da5c3c9 | 439 | int wait_status; /* Status returned by wait(). */ |
440 | pid_t wait_pid; /* pid returned by wait(). */ | |
5260325f | 441 | int waiting_termination = 0; /* Have displayed waiting close message. */ |
1e3b8b07 | 442 | u_int max_time_milliseconds; |
443 | u_int previous_stdout_buffer_bytes; | |
444 | u_int stdout_buffer_bytes; | |
5260325f | 445 | int type; |
446 | ||
447 | debug("Entering interactive session."); | |
448 | ||
449 | /* Initialize the SIGCHLD kludge. */ | |
5260325f | 450 | child_terminated = 0; |
451 | signal(SIGCHLD, sigchld_handler); | |
452 | ||
453 | /* Initialize our global variables. */ | |
454 | fdin = fdin_arg; | |
455 | fdout = fdout_arg; | |
456 | fderr = fderr_arg; | |
0e73cc53 | 457 | |
458 | /* nonblocking IO */ | |
459 | set_nonblock(fdin); | |
460 | set_nonblock(fdout); | |
ff873e98 | 461 | /* we don't have stderr for interactive terminal sessions, see below */ |
462 | if (fderr != -1) | |
463 | set_nonblock(fderr); | |
0e73cc53 | 464 | |
e68225b2 | 465 | if (!(datafellows & SSH_BUG_IGNOREMSG) && isatty(fdin)) |
466 | fdin_is_tty = 1; | |
467 | ||
5260325f | 468 | connection_in = packet_get_connection_in(); |
469 | connection_out = packet_get_connection_out(); | |
470 | ||
471 | previous_stdout_buffer_bytes = 0; | |
472 | ||
473 | /* Set approximate I/O buffer size. */ | |
474 | if (packet_is_interactive()) | |
475 | buffer_high = 4096; | |
476 | else | |
477 | buffer_high = 64 * 1024; | |
478 | ||
489aa2e9 | 479 | #if 0 |
5260325f | 480 | /* Initialize max_fd to the maximum of the known file descriptors. */ |
489aa2e9 | 481 | max_fd = MAX(connection_in, connection_out); |
482 | max_fd = MAX(max_fd, fdin); | |
483 | max_fd = MAX(max_fd, fdout); | |
39929cdb | 484 | if (fderr != -1) |
485 | max_fd = MAX(max_fd, fderr); | |
489aa2e9 | 486 | #endif |
5260325f | 487 | |
488 | /* Initialize Initialize buffers. */ | |
489 | buffer_init(&stdin_buffer); | |
490 | buffer_init(&stdout_buffer); | |
491 | buffer_init(&stderr_buffer); | |
492 | ||
aa3378df | 493 | /* |
494 | * If we have no separate fderr (which is the case when we have a pty | |
495 | * - there we cannot make difference between data sent to stdout and | |
496 | * stderr), indicate that we have seen an EOF from stderr. This way | |
497 | * we don\'t need to check the descriptor everywhere. | |
498 | */ | |
5260325f | 499 | if (fderr == -1) |
500 | fderr_eof = 1; | |
501 | ||
7368a6c8 | 502 | server_init_dispatch(); |
503 | ||
5260325f | 504 | /* Main loop of the server for the interactive session mode. */ |
505 | for (;;) { | |
5260325f | 506 | |
507 | /* Process buffered packets from the client. */ | |
508 | process_buffered_input_packets(); | |
509 | ||
aa3378df | 510 | /* |
511 | * If we have received eof, and there is no more pending | |
512 | * input data, cause a real eof by closing fdin. | |
513 | */ | |
5260325f | 514 | if (stdin_eof && fdin != -1 && buffer_len(&stdin_buffer) == 0) { |
8efc0c15 | 515 | #ifdef USE_PIPES |
5260325f | 516 | close(fdin); |
8efc0c15 | 517 | #else |
7368a6c8 | 518 | if (fdin != fdout) |
5260325f | 519 | close(fdin); |
520 | else | |
521 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
8efc0c15 | 522 | #endif |
5260325f | 523 | fdin = -1; |
524 | } | |
aa3378df | 525 | /* Make packets from buffered stderr data to send to the client. */ |
5260325f | 526 | make_packets_from_stderr_data(); |
527 | ||
aa3378df | 528 | /* |
529 | * Make packets from buffered stdout data to send to the | |
530 | * client. If there is very little to send, this arranges to | |
531 | * not send them now, but to wait a short while to see if we | |
532 | * are getting more data. This is necessary, as some systems | |
533 | * wake up readers from a pty after each separate character. | |
534 | */ | |
5260325f | 535 | max_time_milliseconds = 0; |
536 | stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
537 | if (stdout_buffer_bytes != 0 && stdout_buffer_bytes < 256 && | |
538 | stdout_buffer_bytes != previous_stdout_buffer_bytes) { | |
539 | /* try again after a while */ | |
540 | max_time_milliseconds = 10; | |
541 | } else { | |
542 | /* Send it now. */ | |
543 | make_packets_from_stdout_data(); | |
544 | } | |
545 | previous_stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
546 | ||
547 | /* Send channel data to the client. */ | |
548 | if (packet_not_very_much_data_to_write()) | |
549 | channel_output_poll(); | |
550 | ||
aa3378df | 551 | /* |
552 | * Bail out of the loop if the program has closed its output | |
553 | * descriptors, and we have no more data to send to the | |
554 | * client, and there is no pending buffered data. | |
555 | */ | |
7062c40f | 556 | if (fdout_eof && fderr_eof && !packet_have_data_to_write() && |
557 | buffer_len(&stdout_buffer) == 0 && buffer_len(&stderr_buffer) == 0) { | |
5260325f | 558 | if (!channel_still_open()) |
7368a6c8 | 559 | break; |
5260325f | 560 | if (!waiting_termination) { |
561 | const char *s = "Waiting for forwarded connections to terminate...\r\n"; | |
562 | char *cp; | |
563 | waiting_termination = 1; | |
564 | buffer_append(&stderr_buffer, s, strlen(s)); | |
565 | ||
566 | /* Display list of open channels. */ | |
567 | cp = channel_open_message(); | |
568 | buffer_append(&stderr_buffer, cp, strlen(cp)); | |
569 | xfree(cp); | |
570 | } | |
571 | } | |
489aa2e9 | 572 | max_fd = MAX(connection_in, connection_out); |
573 | max_fd = MAX(max_fd, fdin); | |
574 | max_fd = MAX(max_fd, fdout); | |
575 | max_fd = MAX(max_fd, fderr); | |
576 | ||
5260325f | 577 | /* Sleep in select() until we can do something. */ |
39929cdb | 578 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 579 | &nalloc, max_time_milliseconds); |
5260325f | 580 | |
581 | /* Process any channel events. */ | |
39929cdb | 582 | channel_after_select(readset, writeset); |
5260325f | 583 | |
584 | /* Process input from the client and from program stdout/stderr. */ | |
39929cdb | 585 | process_input(readset); |
5260325f | 586 | |
587 | /* Process output to the client and to program stdin. */ | |
39929cdb | 588 | process_output(writeset); |
8efc0c15 | 589 | } |
39929cdb | 590 | if (readset) |
591 | xfree(readset); | |
592 | if (writeset) | |
593 | xfree(writeset); | |
8efc0c15 | 594 | |
5260325f | 595 | /* Cleanup and termination code. */ |
8efc0c15 | 596 | |
5260325f | 597 | /* Wait until all output has been sent to the client. */ |
598 | drain_output(); | |
8efc0c15 | 599 | |
5260325f | 600 | debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.", |
601 | stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes); | |
8efc0c15 | 602 | |
5260325f | 603 | /* Free and clear the buffers. */ |
604 | buffer_free(&stdin_buffer); | |
605 | buffer_free(&stdout_buffer); | |
606 | buffer_free(&stderr_buffer); | |
8efc0c15 | 607 | |
5260325f | 608 | /* Close the file descriptors. */ |
609 | if (fdout != -1) | |
610 | close(fdout); | |
611 | fdout = -1; | |
612 | fdout_eof = 1; | |
613 | if (fderr != -1) | |
614 | close(fderr); | |
615 | fderr = -1; | |
616 | fderr_eof = 1; | |
617 | if (fdin != -1) | |
618 | close(fdin); | |
619 | fdin = -1; | |
620 | ||
d6746a0b | 621 | channel_free_all(); |
5260325f | 622 | |
5260325f | 623 | /* We no longer want our SIGCHLD handler to be called. */ |
624 | signal(SIGCHLD, SIG_DFL); | |
625 | ||
c9130033 | 626 | wait_pid = waitpid(-1, &wait_status, child_terminated ? WNOHANG : 0); |
627 | if (wait_pid == -1) | |
628 | packet_disconnect("wait: %.100s", strerror(errno)); | |
629 | else if (wait_pid != pid) | |
630 | error("Strange, wait returned pid %d, expected %d", | |
631 | wait_pid, pid); | |
632 | ||
5260325f | 633 | /* Check if it exited normally. */ |
634 | if (WIFEXITED(wait_status)) { | |
635 | /* Yes, normal exit. Get exit status and send it to the client. */ | |
636 | debug("Command exited with status %d.", WEXITSTATUS(wait_status)); | |
637 | packet_start(SSH_SMSG_EXITSTATUS); | |
638 | packet_put_int(WEXITSTATUS(wait_status)); | |
639 | packet_send(); | |
640 | packet_write_wait(); | |
641 | ||
aa3378df | 642 | /* |
643 | * Wait for exit confirmation. Note that there might be | |
644 | * other packets coming before it; however, the program has | |
645 | * already died so we just ignore them. The client is | |
646 | * supposed to respond with the confirmation when it receives | |
647 | * the exit status. | |
648 | */ | |
5260325f | 649 | do { |
650 | int plen; | |
651 | type = packet_read(&plen); | |
652 | } | |
653 | while (type != SSH_CMSG_EXIT_CONFIRMATION); | |
654 | ||
655 | debug("Received exit confirmation."); | |
656 | return; | |
657 | } | |
658 | /* Check if the program terminated due to a signal. */ | |
659 | if (WIFSIGNALED(wait_status)) | |
660 | packet_disconnect("Command terminated on signal %d.", | |
661 | WTERMSIG(wait_status)); | |
662 | ||
663 | /* Some weird exit cause. Just exit. */ | |
664 | packet_disconnect("wait returned status %04x.", wait_status); | |
665 | /* NOTREACHED */ | |
666 | } | |
7368a6c8 | 667 | |
6ae2364d | 668 | void |
57156994 | 669 | server_loop2(Authctxt *authctxt) |
e78a59f5 | 670 | { |
39929cdb | 671 | fd_set *readset = NULL, *writeset = NULL; |
489aa2e9 | 672 | int rekeying = 0, max_fd, status, nalloc = 0; |
e78a59f5 | 673 | pid_t pid; |
674 | ||
675 | debug("Entering interactive session for SSH2."); | |
676 | ||
c9130033 | 677 | mysignal(SIGCHLD, sigchld_handler); |
e78a59f5 | 678 | child_terminated = 0; |
679 | connection_in = packet_get_connection_in(); | |
680 | connection_out = packet_get_connection_out(); | |
39929cdb | 681 | |
682 | max_fd = MAX(connection_in, connection_out); | |
57156994 | 683 | xxx_authctxt = authctxt; |
39929cdb | 684 | |
e78a59f5 | 685 | server_init_dispatch(); |
686 | ||
687 | for (;;) { | |
688 | process_buffered_input_packets(); | |
bbb4cc1b | 689 | |
cd332296 | 690 | rekeying = (xxx_kex != NULL && !xxx_kex->done); |
bbb4cc1b | 691 | |
bbb4cc1b | 692 | if (!rekeying && packet_not_very_much_data_to_write()) |
e78a59f5 | 693 | channel_output_poll(); |
bbb4cc1b | 694 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 695 | &nalloc, 0); |
7062c40f | 696 | if (child_terminated) { |
e78a59f5 | 697 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
698 | session_close_by_pid(pid, status); | |
699 | child_terminated = 0; | |
700 | } | |
bbb4cc1b | 701 | if (!rekeying) |
702 | channel_after_select(readset, writeset); | |
39929cdb | 703 | process_input(readset); |
cc94bd38 | 704 | if (connection_closed) |
705 | break; | |
39929cdb | 706 | process_output(writeset); |
e78a59f5 | 707 | } |
39929cdb | 708 | if (readset) |
709 | xfree(readset); | |
710 | if (writeset) | |
711 | xfree(writeset); | |
712 | ||
e78a59f5 | 713 | signal(SIGCHLD, SIG_DFL); |
5b5d170c | 714 | |
e78a59f5 | 715 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
716 | session_close_by_pid(pid, status); | |
5b5d170c | 717 | /* |
718 | * there is a race between channel_free_all() killing children and | |
719 | * children dying before kill() | |
720 | */ | |
3cf2be58 | 721 | channel_detach_all(); |
722 | channel_stop_listening(); | |
5b5d170c | 723 | |
724 | while (session_have_children()) { | |
725 | pid = waitpid(-1, &status, 0); | |
726 | if (pid > 0) | |
727 | session_close_by_pid(pid, status); | |
728 | else { | |
729 | error("waitpid returned %d: %s", pid, strerror(errno)); | |
730 | break; | |
731 | } | |
732 | } | |
3cf2be58 | 733 | channel_free_all(); |
e78a59f5 | 734 | } |
735 | ||
396c147e | 736 | static void |
3ffc6336 | 737 | server_input_channel_failure(int type, int plen, void *ctxt) |
738 | { | |
739 | debug("Got CHANNEL_FAILURE for keepalive"); | |
740 | /* | |
39aefe7b | 741 | * reset timeout, since we got a sane answer from the client. |
3ffc6336 | 742 | * even if this was generated by something other than |
743 | * the bogus CHANNEL_REQUEST we send for keepalives. | |
744 | */ | |
745 | client_alive_timeouts = 0; | |
746 | } | |
747 | ||
748 | ||
396c147e | 749 | static void |
188adeb2 | 750 | server_input_stdin_data(int type, int plen, void *ctxt) |
7368a6c8 | 751 | { |
752 | char *data; | |
1e3b8b07 | 753 | u_int data_len; |
7368a6c8 | 754 | |
755 | /* Stdin data from the client. Append it to the buffer. */ | |
756 | /* Ignore any data if the client has closed stdin. */ | |
757 | if (fdin == -1) | |
758 | return; | |
759 | data = packet_get_string(&data_len); | |
760 | packet_integrity_check(plen, (4 + data_len), type); | |
761 | buffer_append(&stdin_buffer, data, data_len); | |
762 | memset(data, 0, data_len); | |
763 | xfree(data); | |
764 | } | |
765 | ||
396c147e | 766 | static void |
188adeb2 | 767 | server_input_eof(int type, int plen, void *ctxt) |
7368a6c8 | 768 | { |
769 | /* | |
770 | * Eof from the client. The stdin descriptor to the | |
771 | * program will be closed when all buffered data has | |
772 | * drained. | |
773 | */ | |
774 | debug("EOF received for stdin."); | |
775 | packet_integrity_check(plen, 0, type); | |
776 | stdin_eof = 1; | |
777 | } | |
778 | ||
396c147e | 779 | static void |
188adeb2 | 780 | server_input_window_size(int type, int plen, void *ctxt) |
7368a6c8 | 781 | { |
782 | int row = packet_get_int(); | |
783 | int col = packet_get_int(); | |
784 | int xpixel = packet_get_int(); | |
785 | int ypixel = packet_get_int(); | |
786 | ||
787 | debug("Window change received."); | |
788 | packet_integrity_check(plen, 4 * 4, type); | |
789 | if (fdin != -1) | |
790 | pty_change_window_size(fdin, row, col, xpixel, ypixel); | |
791 | } | |
792 | ||
396c147e | 793 | static Channel * |
fa08c86b | 794 | server_request_direct_tcpip(char *ctype) |
e78a59f5 | 795 | { |
719fc62f | 796 | Channel *c; |
797 | int sock; | |
6ae2364d | 798 | char *target, *originator; |
799 | int target_port, originator_port; | |
e78a59f5 | 800 | |
6ae2364d | 801 | target = packet_get_string(NULL); |
802 | target_port = packet_get_int(); | |
e78a59f5 | 803 | originator = packet_get_string(NULL); |
804 | originator_port = packet_get_int(); | |
6ae2364d | 805 | packet_done(); |
71276795 | 806 | |
fa08c86b | 807 | debug("server_request_direct_tcpip: originator %s port %d, target %s port %d", |
71276795 | 808 | originator, originator_port, target, target_port); |
38c295d6 | 809 | |
e78a59f5 | 810 | /* XXX check permission */ |
6ae2364d | 811 | sock = channel_connect_to(target, target_port); |
812 | xfree(target); | |
e78a59f5 | 813 | xfree(originator); |
814 | if (sock < 0) | |
fa08c86b | 815 | return NULL; |
719fc62f | 816 | c = channel_new(ctype, SSH_CHANNEL_CONNECTING, |
bcbf86ec | 817 | sock, sock, -1, CHAN_TCP_WINDOW_DEFAULT, |
a22aff1f | 818 | CHAN_TCP_PACKET_DEFAULT, 0, xstrdup("direct-tcpip"), 1); |
719fc62f | 819 | if (c == NULL) { |
820 | error("server_request_direct_tcpip: channel_new failed"); | |
821 | close(sock); | |
822 | } | |
823 | return c; | |
fa08c86b | 824 | } |
825 | ||
396c147e | 826 | static Channel * |
fa08c86b | 827 | server_request_session(char *ctype) |
828 | { | |
719fc62f | 829 | Channel *c; |
fa08c86b | 830 | |
831 | debug("input_session_request"); | |
832 | packet_done(); | |
833 | /* | |
834 | * A server session has no fd to read or write until a | |
835 | * CHANNEL_REQUEST for a shell is made, so we set the type to | |
836 | * SSH_CHANNEL_LARVAL. Additionally, a callback for handling all | |
837 | * CHANNEL_REQUEST messages is registered. | |
838 | */ | |
719fc62f | 839 | c = channel_new(ctype, SSH_CHANNEL_LARVAL, |
840 | -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT, | |
fa08c86b | 841 | 0, xstrdup("server-session"), 1); |
719fc62f | 842 | if (c == NULL) { |
843 | error("server_request_session: channel_new failed"); | |
844 | return NULL; | |
845 | } | |
57156994 | 846 | if (session_open(xxx_authctxt, c->self) != 1) { |
719fc62f | 847 | debug("session open failed, free channel %d", c->self); |
848 | channel_free(c); | |
849 | return NULL; | |
fa08c86b | 850 | } |
719fc62f | 851 | channel_register_callback(c->self, SSH2_MSG_CHANNEL_REQUEST, |
852 | session_input_channel_req, (void *)0); | |
853 | channel_register_cleanup(c->self, session_close_by_channel); | |
854 | return c; | |
e78a59f5 | 855 | } |
856 | ||
396c147e | 857 | static void |
188adeb2 | 858 | server_input_channel_open(int type, int plen, void *ctxt) |
e78a59f5 | 859 | { |
860 | Channel *c = NULL; | |
861 | char *ctype; | |
1e3b8b07 | 862 | u_int len; |
e78a59f5 | 863 | int rchan; |
864 | int rmaxpack; | |
865 | int rwindow; | |
866 | ||
867 | ctype = packet_get_string(&len); | |
868 | rchan = packet_get_int(); | |
869 | rwindow = packet_get_int(); | |
870 | rmaxpack = packet_get_int(); | |
871 | ||
188adeb2 | 872 | debug("server_input_channel_open: ctype %s rchan %d win %d max %d", |
e78a59f5 | 873 | ctype, rchan, rwindow, rmaxpack); |
874 | ||
875 | if (strcmp(ctype, "session") == 0) { | |
fa08c86b | 876 | c = server_request_session(ctype); |
e78a59f5 | 877 | } else if (strcmp(ctype, "direct-tcpip") == 0) { |
fa08c86b | 878 | c = server_request_direct_tcpip(ctype); |
e78a59f5 | 879 | } |
880 | if (c != NULL) { | |
fa08c86b | 881 | debug("server_input_channel_open: confirm %s", ctype); |
e78a59f5 | 882 | c->remote_id = rchan; |
883 | c->remote_window = rwindow; | |
884 | c->remote_maxpacket = rmaxpack; | |
d18e0850 | 885 | if (c->type != SSH_CHANNEL_CONNECTING) { |
886 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
887 | packet_put_int(c->remote_id); | |
888 | packet_put_int(c->self); | |
889 | packet_put_int(c->local_window); | |
890 | packet_put_int(c->local_maxpacket); | |
891 | packet_send(); | |
892 | } | |
e78a59f5 | 893 | } else { |
fa08c86b | 894 | debug("server_input_channel_open: failure %s", ctype); |
e78a59f5 | 895 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); |
896 | packet_put_int(rchan); | |
897 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 898 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
d18e0850 | 899 | packet_put_cstring("open failed"); |
fbe90f7b | 900 | packet_put_cstring(""); |
901 | } | |
e78a59f5 | 902 | packet_send(); |
903 | } | |
904 | xfree(ctype); | |
905 | } | |
906 | ||
396c147e | 907 | static void |
fa08c86b | 908 | server_input_global_request(int type, int plen, void *ctxt) |
909 | { | |
910 | char *rtype; | |
911 | int want_reply; | |
912 | int success = 0; | |
913 | ||
914 | rtype = packet_get_string(NULL); | |
915 | want_reply = packet_get_char(); | |
916 | debug("server_input_global_request: rtype %s want_reply %d", rtype, want_reply); | |
2b87da3b | 917 | |
01794848 | 918 | /* -R style forwarding */ |
fa08c86b | 919 | if (strcmp(rtype, "tcpip-forward") == 0) { |
920 | struct passwd *pw; | |
921 | char *listen_address; | |
922 | u_short listen_port; | |
923 | ||
924 | pw = auth_get_user(); | |
925 | if (pw == NULL) | |
926 | fatal("server_input_global_request: no user"); | |
927 | listen_address = packet_get_string(NULL); /* XXX currently ignored */ | |
928 | listen_port = (u_short)packet_get_int(); | |
929 | debug("server_input_global_request: tcpip-forward listen %s port %d", | |
930 | listen_address, listen_port); | |
931 | ||
932 | /* check permissions */ | |
933 | if (!options.allow_tcp_forwarding || | |
934 | no_port_forwarding_flag || | |
935 | (listen_port < IPPORT_RESERVED && pw->pw_uid != 0)) { | |
936 | success = 0; | |
937 | packet_send_debug("Server has disabled port forwarding."); | |
938 | } else { | |
939 | /* Start listening on the port */ | |
02a024dd | 940 | success = channel_request_forwarding( |
fa08c86b | 941 | listen_address, listen_port, |
942 | /*unspec host_to_connect*/ "<unspec host>", | |
943 | /*unspec port_to_connect*/ 0, | |
944 | options.gateway_ports, /*remote*/ 1); | |
fa08c86b | 945 | } |
946 | xfree(listen_address); | |
947 | } | |
948 | if (want_reply) { | |
949 | packet_start(success ? | |
950 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
951 | packet_send(); | |
952 | packet_write_wait(); | |
953 | } | |
954 | xfree(rtype); | |
955 | } | |
956 | ||
396c147e | 957 | static void |
5ca51e19 | 958 | server_init_dispatch_20(void) |
e78a59f5 | 959 | { |
960 | debug("server_init_dispatch_20"); | |
961 | dispatch_init(&dispatch_protocol_error); | |
962 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); | |
963 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
964 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
965 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
966 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &server_input_channel_open); | |
967 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
968 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
969 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &channel_input_channel_request); | |
970 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); | |
fa08c86b | 971 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request); |
3ffc6336 | 972 | /* client_alive */ |
973 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_channel_failure); | |
7a37c112 | 974 | /* rekeying */ |
975 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e78a59f5 | 976 | } |
396c147e | 977 | static void |
5ca51e19 | 978 | server_init_dispatch_13(void) |
7368a6c8 | 979 | { |
980 | debug("server_init_dispatch_13"); | |
981 | dispatch_init(NULL); | |
982 | dispatch_set(SSH_CMSG_EOF, &server_input_eof); | |
983 | dispatch_set(SSH_CMSG_STDIN_DATA, &server_input_stdin_data); | |
984 | dispatch_set(SSH_CMSG_WINDOW_SIZE, &server_input_window_size); | |
985 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
986 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
987 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
988 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
989 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
990 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
991 | } | |
396c147e | 992 | static void |
5ca51e19 | 993 | server_init_dispatch_15(void) |
7368a6c8 | 994 | { |
995 | server_init_dispatch_13(); | |
996 | debug("server_init_dispatch_15"); | |
997 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
998 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_oclose); | |
999 | } | |
396c147e | 1000 | static void |
5ca51e19 | 1001 | server_init_dispatch(void) |
7368a6c8 | 1002 | { |
e78a59f5 | 1003 | if (compat20) |
1004 | server_init_dispatch_20(); | |
1005 | else if (compat13) | |
7368a6c8 | 1006 | server_init_dispatch_13(); |
1007 | else | |
1008 | server_init_dispatch_15(); | |
1009 | } |