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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" | |
780a9951 | 38 | RCSID("$OpenBSD: serverloop.c,v 1.77 2001/09/17 21:04:02 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; |
780a9951 | 352 | u_char *data; |
353 | u_int dlen; | |
5260325f | 354 | int len; |
355 | ||
356 | /* Write buffered data to program stdin. */ | |
e78a59f5 | 357 | if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) { |
780a9951 | 358 | data = buffer_ptr(&stdin_buffer); |
359 | dlen = buffer_len(&stdin_buffer); | |
360 | len = write(fdin, data, dlen); | |
0e73cc53 | 361 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
362 | /* do nothing */ | |
363 | } else if (len <= 0) { | |
8efc0c15 | 364 | #ifdef USE_PIPES |
5260325f | 365 | close(fdin); |
8efc0c15 | 366 | #else |
7368a6c8 | 367 | if (fdin != fdout) |
5260325f | 368 | close(fdin); |
369 | else | |
370 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
8efc0c15 | 371 | #endif |
5260325f | 372 | fdin = -1; |
373 | } else { | |
4ef922e3 | 374 | /* Successful write. */ |
780a9951 | 375 | if (fdin_is_tty && dlen >= 1 && data[0] != '\r' && |
376 | tcgetattr(fdin, &tio) == 0 && | |
0ae4fe1d | 377 | !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) { |
62da27dd | 378 | /* |
379 | * Simulate echo to reduce the impact of | |
380 | * traffic analysis | |
381 | */ | |
95ce5599 | 382 | packet_send_ignore(len); |
4ef922e3 | 383 | packet_send(); |
384 | } | |
385 | /* Consume the data from the buffer. */ | |
5260325f | 386 | buffer_consume(&stdin_buffer, len); |
387 | /* Update the count of bytes written to the program. */ | |
388 | stdin_bytes += len; | |
389 | } | |
8efc0c15 | 390 | } |
5260325f | 391 | /* Send any buffered packet data to the client. */ |
392 | if (FD_ISSET(connection_out, writeset)) | |
393 | packet_write_poll(); | |
8efc0c15 | 394 | } |
395 | ||
5260325f | 396 | /* |
397 | * Wait until all buffered output has been sent to the client. | |
398 | * This is used when the program terminates. | |
399 | */ | |
396c147e | 400 | static void |
5ca51e19 | 401 | drain_output(void) |
8efc0c15 | 402 | { |
5260325f | 403 | /* Send any buffered stdout data to the client. */ |
404 | if (buffer_len(&stdout_buffer) > 0) { | |
405 | packet_start(SSH_SMSG_STDOUT_DATA); | |
406 | packet_put_string(buffer_ptr(&stdout_buffer), | |
407 | buffer_len(&stdout_buffer)); | |
408 | packet_send(); | |
409 | /* Update the count of sent bytes. */ | |
410 | stdout_bytes += buffer_len(&stdout_buffer); | |
411 | } | |
412 | /* Send any buffered stderr data to the client. */ | |
413 | if (buffer_len(&stderr_buffer) > 0) { | |
414 | packet_start(SSH_SMSG_STDERR_DATA); | |
415 | packet_put_string(buffer_ptr(&stderr_buffer), | |
416 | buffer_len(&stderr_buffer)); | |
417 | packet_send(); | |
418 | /* Update the count of sent bytes. */ | |
419 | stderr_bytes += buffer_len(&stderr_buffer); | |
420 | } | |
421 | /* Wait until all buffered data has been written to the client. */ | |
422 | packet_write_wait(); | |
8efc0c15 | 423 | } |
424 | ||
396c147e | 425 | static void |
5ca51e19 | 426 | process_buffered_input_packets(void) |
7368a6c8 | 427 | { |
7a37c112 | 428 | dispatch_run(DISPATCH_NONBLOCK, NULL, compat20 ? xxx_kex : NULL); |
7368a6c8 | 429 | } |
430 | ||
5260325f | 431 | /* |
432 | * Performs the interactive session. This handles data transmission between | |
433 | * the client and the program. Note that the notion of stdin, stdout, and | |
434 | * stderr in this function is sort of reversed: this function writes to | |
435 | * stdin (of the child program), and reads from stdout and stderr (of the | |
436 | * child program). | |
437 | */ | |
6ae2364d | 438 | void |
9da5c3c9 | 439 | server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) |
8efc0c15 | 440 | { |
39929cdb | 441 | fd_set *readset = NULL, *writeset = NULL; |
489aa2e9 | 442 | int max_fd = 0, nalloc = 0; |
9da5c3c9 | 443 | int wait_status; /* Status returned by wait(). */ |
444 | pid_t wait_pid; /* pid returned by wait(). */ | |
5260325f | 445 | int waiting_termination = 0; /* Have displayed waiting close message. */ |
1e3b8b07 | 446 | u_int max_time_milliseconds; |
447 | u_int previous_stdout_buffer_bytes; | |
448 | u_int stdout_buffer_bytes; | |
5260325f | 449 | int type; |
450 | ||
451 | debug("Entering interactive session."); | |
452 | ||
453 | /* Initialize the SIGCHLD kludge. */ | |
5260325f | 454 | child_terminated = 0; |
42ad0eec | 455 | mysignal(SIGCHLD, sigchld_handler); |
5260325f | 456 | |
457 | /* Initialize our global variables. */ | |
458 | fdin = fdin_arg; | |
459 | fdout = fdout_arg; | |
460 | fderr = fderr_arg; | |
0e73cc53 | 461 | |
462 | /* nonblocking IO */ | |
463 | set_nonblock(fdin); | |
464 | set_nonblock(fdout); | |
ff873e98 | 465 | /* we don't have stderr for interactive terminal sessions, see below */ |
466 | if (fderr != -1) | |
467 | set_nonblock(fderr); | |
0e73cc53 | 468 | |
e68225b2 | 469 | if (!(datafellows & SSH_BUG_IGNOREMSG) && isatty(fdin)) |
470 | fdin_is_tty = 1; | |
471 | ||
5260325f | 472 | connection_in = packet_get_connection_in(); |
473 | connection_out = packet_get_connection_out(); | |
474 | ||
475 | previous_stdout_buffer_bytes = 0; | |
476 | ||
477 | /* Set approximate I/O buffer size. */ | |
478 | if (packet_is_interactive()) | |
479 | buffer_high = 4096; | |
480 | else | |
481 | buffer_high = 64 * 1024; | |
482 | ||
489aa2e9 | 483 | #if 0 |
5260325f | 484 | /* Initialize max_fd to the maximum of the known file descriptors. */ |
489aa2e9 | 485 | max_fd = MAX(connection_in, connection_out); |
486 | max_fd = MAX(max_fd, fdin); | |
487 | max_fd = MAX(max_fd, fdout); | |
39929cdb | 488 | if (fderr != -1) |
489 | max_fd = MAX(max_fd, fderr); | |
489aa2e9 | 490 | #endif |
5260325f | 491 | |
492 | /* Initialize Initialize buffers. */ | |
493 | buffer_init(&stdin_buffer); | |
494 | buffer_init(&stdout_buffer); | |
495 | buffer_init(&stderr_buffer); | |
496 | ||
aa3378df | 497 | /* |
498 | * If we have no separate fderr (which is the case when we have a pty | |
499 | * - there we cannot make difference between data sent to stdout and | |
500 | * stderr), indicate that we have seen an EOF from stderr. This way | |
501 | * we don\'t need to check the descriptor everywhere. | |
502 | */ | |
5260325f | 503 | if (fderr == -1) |
504 | fderr_eof = 1; | |
505 | ||
7368a6c8 | 506 | server_init_dispatch(); |
507 | ||
5260325f | 508 | /* Main loop of the server for the interactive session mode. */ |
509 | for (;;) { | |
5260325f | 510 | |
511 | /* Process buffered packets from the client. */ | |
512 | process_buffered_input_packets(); | |
513 | ||
aa3378df | 514 | /* |
515 | * If we have received eof, and there is no more pending | |
516 | * input data, cause a real eof by closing fdin. | |
517 | */ | |
5260325f | 518 | if (stdin_eof && fdin != -1 && buffer_len(&stdin_buffer) == 0) { |
8efc0c15 | 519 | #ifdef USE_PIPES |
5260325f | 520 | close(fdin); |
8efc0c15 | 521 | #else |
7368a6c8 | 522 | if (fdin != fdout) |
5260325f | 523 | close(fdin); |
524 | else | |
525 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
8efc0c15 | 526 | #endif |
5260325f | 527 | fdin = -1; |
528 | } | |
aa3378df | 529 | /* Make packets from buffered stderr data to send to the client. */ |
5260325f | 530 | make_packets_from_stderr_data(); |
531 | ||
aa3378df | 532 | /* |
533 | * Make packets from buffered stdout data to send to the | |
534 | * client. If there is very little to send, this arranges to | |
535 | * not send them now, but to wait a short while to see if we | |
536 | * are getting more data. This is necessary, as some systems | |
537 | * wake up readers from a pty after each separate character. | |
538 | */ | |
5260325f | 539 | max_time_milliseconds = 0; |
540 | stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
541 | if (stdout_buffer_bytes != 0 && stdout_buffer_bytes < 256 && | |
542 | stdout_buffer_bytes != previous_stdout_buffer_bytes) { | |
543 | /* try again after a while */ | |
544 | max_time_milliseconds = 10; | |
545 | } else { | |
546 | /* Send it now. */ | |
547 | make_packets_from_stdout_data(); | |
548 | } | |
549 | previous_stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
550 | ||
551 | /* Send channel data to the client. */ | |
552 | if (packet_not_very_much_data_to_write()) | |
553 | channel_output_poll(); | |
554 | ||
aa3378df | 555 | /* |
556 | * Bail out of the loop if the program has closed its output | |
557 | * descriptors, and we have no more data to send to the | |
558 | * client, and there is no pending buffered data. | |
559 | */ | |
7062c40f | 560 | if (fdout_eof && fderr_eof && !packet_have_data_to_write() && |
561 | buffer_len(&stdout_buffer) == 0 && buffer_len(&stderr_buffer) == 0) { | |
5260325f | 562 | if (!channel_still_open()) |
7368a6c8 | 563 | break; |
5260325f | 564 | if (!waiting_termination) { |
565 | const char *s = "Waiting for forwarded connections to terminate...\r\n"; | |
566 | char *cp; | |
567 | waiting_termination = 1; | |
568 | buffer_append(&stderr_buffer, s, strlen(s)); | |
569 | ||
570 | /* Display list of open channels. */ | |
571 | cp = channel_open_message(); | |
572 | buffer_append(&stderr_buffer, cp, strlen(cp)); | |
573 | xfree(cp); | |
574 | } | |
575 | } | |
489aa2e9 | 576 | max_fd = MAX(connection_in, connection_out); |
577 | max_fd = MAX(max_fd, fdin); | |
578 | max_fd = MAX(max_fd, fdout); | |
579 | max_fd = MAX(max_fd, fderr); | |
580 | ||
5260325f | 581 | /* Sleep in select() until we can do something. */ |
39929cdb | 582 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 583 | &nalloc, max_time_milliseconds); |
5260325f | 584 | |
585 | /* Process any channel events. */ | |
39929cdb | 586 | channel_after_select(readset, writeset); |
5260325f | 587 | |
588 | /* Process input from the client and from program stdout/stderr. */ | |
39929cdb | 589 | process_input(readset); |
5260325f | 590 | |
591 | /* Process output to the client and to program stdin. */ | |
39929cdb | 592 | process_output(writeset); |
8efc0c15 | 593 | } |
39929cdb | 594 | if (readset) |
595 | xfree(readset); | |
596 | if (writeset) | |
597 | xfree(writeset); | |
8efc0c15 | 598 | |
5260325f | 599 | /* Cleanup and termination code. */ |
8efc0c15 | 600 | |
5260325f | 601 | /* Wait until all output has been sent to the client. */ |
602 | drain_output(); | |
8efc0c15 | 603 | |
5260325f | 604 | debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.", |
605 | stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes); | |
8efc0c15 | 606 | |
5260325f | 607 | /* Free and clear the buffers. */ |
608 | buffer_free(&stdin_buffer); | |
609 | buffer_free(&stdout_buffer); | |
610 | buffer_free(&stderr_buffer); | |
8efc0c15 | 611 | |
5260325f | 612 | /* Close the file descriptors. */ |
613 | if (fdout != -1) | |
614 | close(fdout); | |
615 | fdout = -1; | |
616 | fdout_eof = 1; | |
617 | if (fderr != -1) | |
618 | close(fderr); | |
619 | fderr = -1; | |
620 | fderr_eof = 1; | |
621 | if (fdin != -1) | |
622 | close(fdin); | |
623 | fdin = -1; | |
624 | ||
d6746a0b | 625 | channel_free_all(); |
5260325f | 626 | |
5260325f | 627 | /* We no longer want our SIGCHLD handler to be called. */ |
42ad0eec | 628 | mysignal(SIGCHLD, SIG_DFL); |
5260325f | 629 | |
c9130033 | 630 | wait_pid = waitpid(-1, &wait_status, child_terminated ? WNOHANG : 0); |
631 | if (wait_pid == -1) | |
632 | packet_disconnect("wait: %.100s", strerror(errno)); | |
633 | else if (wait_pid != pid) | |
634 | error("Strange, wait returned pid %d, expected %d", | |
635 | wait_pid, pid); | |
636 | ||
5260325f | 637 | /* Check if it exited normally. */ |
638 | if (WIFEXITED(wait_status)) { | |
639 | /* Yes, normal exit. Get exit status and send it to the client. */ | |
640 | debug("Command exited with status %d.", WEXITSTATUS(wait_status)); | |
641 | packet_start(SSH_SMSG_EXITSTATUS); | |
642 | packet_put_int(WEXITSTATUS(wait_status)); | |
643 | packet_send(); | |
644 | packet_write_wait(); | |
645 | ||
aa3378df | 646 | /* |
647 | * Wait for exit confirmation. Note that there might be | |
648 | * other packets coming before it; however, the program has | |
649 | * already died so we just ignore them. The client is | |
650 | * supposed to respond with the confirmation when it receives | |
651 | * the exit status. | |
652 | */ | |
5260325f | 653 | do { |
654 | int plen; | |
655 | type = packet_read(&plen); | |
656 | } | |
657 | while (type != SSH_CMSG_EXIT_CONFIRMATION); | |
658 | ||
659 | debug("Received exit confirmation."); | |
660 | return; | |
661 | } | |
662 | /* Check if the program terminated due to a signal. */ | |
663 | if (WIFSIGNALED(wait_status)) | |
664 | packet_disconnect("Command terminated on signal %d.", | |
665 | WTERMSIG(wait_status)); | |
666 | ||
667 | /* Some weird exit cause. Just exit. */ | |
668 | packet_disconnect("wait returned status %04x.", wait_status); | |
669 | /* NOTREACHED */ | |
670 | } | |
7368a6c8 | 671 | |
6ae2364d | 672 | void |
57156994 | 673 | server_loop2(Authctxt *authctxt) |
e78a59f5 | 674 | { |
39929cdb | 675 | fd_set *readset = NULL, *writeset = NULL; |
489aa2e9 | 676 | int rekeying = 0, max_fd, status, nalloc = 0; |
e78a59f5 | 677 | pid_t pid; |
678 | ||
679 | debug("Entering interactive session for SSH2."); | |
680 | ||
c9130033 | 681 | mysignal(SIGCHLD, sigchld_handler); |
e78a59f5 | 682 | child_terminated = 0; |
683 | connection_in = packet_get_connection_in(); | |
684 | connection_out = packet_get_connection_out(); | |
39929cdb | 685 | |
686 | max_fd = MAX(connection_in, connection_out); | |
57156994 | 687 | xxx_authctxt = authctxt; |
39929cdb | 688 | |
e78a59f5 | 689 | server_init_dispatch(); |
690 | ||
691 | for (;;) { | |
692 | process_buffered_input_packets(); | |
bbb4cc1b | 693 | |
cd332296 | 694 | rekeying = (xxx_kex != NULL && !xxx_kex->done); |
bbb4cc1b | 695 | |
bbb4cc1b | 696 | if (!rekeying && packet_not_very_much_data_to_write()) |
e78a59f5 | 697 | channel_output_poll(); |
bbb4cc1b | 698 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 699 | &nalloc, 0); |
7062c40f | 700 | if (child_terminated) { |
e78a59f5 | 701 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
702 | session_close_by_pid(pid, status); | |
703 | child_terminated = 0; | |
704 | } | |
bbb4cc1b | 705 | if (!rekeying) |
706 | channel_after_select(readset, writeset); | |
39929cdb | 707 | process_input(readset); |
cc94bd38 | 708 | if (connection_closed) |
709 | break; | |
39929cdb | 710 | process_output(writeset); |
e78a59f5 | 711 | } |
39929cdb | 712 | if (readset) |
713 | xfree(readset); | |
714 | if (writeset) | |
715 | xfree(writeset); | |
716 | ||
42ad0eec | 717 | mysignal(SIGCHLD, SIG_DFL); |
5b5d170c | 718 | |
e78a59f5 | 719 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0) |
720 | session_close_by_pid(pid, status); | |
5b5d170c | 721 | /* |
722 | * there is a race between channel_free_all() killing children and | |
723 | * children dying before kill() | |
724 | */ | |
3cf2be58 | 725 | channel_detach_all(); |
726 | channel_stop_listening(); | |
5b5d170c | 727 | |
728 | while (session_have_children()) { | |
729 | pid = waitpid(-1, &status, 0); | |
730 | if (pid > 0) | |
731 | session_close_by_pid(pid, status); | |
732 | else { | |
733 | error("waitpid returned %d: %s", pid, strerror(errno)); | |
734 | break; | |
735 | } | |
736 | } | |
3cf2be58 | 737 | channel_free_all(); |
e78a59f5 | 738 | } |
739 | ||
396c147e | 740 | static void |
3ffc6336 | 741 | server_input_channel_failure(int type, int plen, void *ctxt) |
742 | { | |
743 | debug("Got CHANNEL_FAILURE for keepalive"); | |
744 | /* | |
39aefe7b | 745 | * reset timeout, since we got a sane answer from the client. |
3ffc6336 | 746 | * even if this was generated by something other than |
747 | * the bogus CHANNEL_REQUEST we send for keepalives. | |
748 | */ | |
749 | client_alive_timeouts = 0; | |
750 | } | |
751 | ||
752 | ||
396c147e | 753 | static void |
188adeb2 | 754 | server_input_stdin_data(int type, int plen, void *ctxt) |
7368a6c8 | 755 | { |
756 | char *data; | |
1e3b8b07 | 757 | u_int data_len; |
7368a6c8 | 758 | |
759 | /* Stdin data from the client. Append it to the buffer. */ | |
760 | /* Ignore any data if the client has closed stdin. */ | |
761 | if (fdin == -1) | |
762 | return; | |
763 | data = packet_get_string(&data_len); | |
764 | packet_integrity_check(plen, (4 + data_len), type); | |
765 | buffer_append(&stdin_buffer, data, data_len); | |
766 | memset(data, 0, data_len); | |
767 | xfree(data); | |
768 | } | |
769 | ||
396c147e | 770 | static void |
188adeb2 | 771 | server_input_eof(int type, int plen, void *ctxt) |
7368a6c8 | 772 | { |
773 | /* | |
774 | * Eof from the client. The stdin descriptor to the | |
775 | * program will be closed when all buffered data has | |
776 | * drained. | |
777 | */ | |
778 | debug("EOF received for stdin."); | |
779 | packet_integrity_check(plen, 0, type); | |
780 | stdin_eof = 1; | |
781 | } | |
782 | ||
396c147e | 783 | static void |
188adeb2 | 784 | server_input_window_size(int type, int plen, void *ctxt) |
7368a6c8 | 785 | { |
786 | int row = packet_get_int(); | |
787 | int col = packet_get_int(); | |
788 | int xpixel = packet_get_int(); | |
789 | int ypixel = packet_get_int(); | |
790 | ||
791 | debug("Window change received."); | |
792 | packet_integrity_check(plen, 4 * 4, type); | |
793 | if (fdin != -1) | |
794 | pty_change_window_size(fdin, row, col, xpixel, ypixel); | |
795 | } | |
796 | ||
396c147e | 797 | static Channel * |
fa08c86b | 798 | server_request_direct_tcpip(char *ctype) |
e78a59f5 | 799 | { |
719fc62f | 800 | Channel *c; |
801 | int sock; | |
6ae2364d | 802 | char *target, *originator; |
803 | int target_port, originator_port; | |
e78a59f5 | 804 | |
6ae2364d | 805 | target = packet_get_string(NULL); |
806 | target_port = packet_get_int(); | |
e78a59f5 | 807 | originator = packet_get_string(NULL); |
808 | originator_port = packet_get_int(); | |
6ae2364d | 809 | packet_done(); |
71276795 | 810 | |
fa08c86b | 811 | debug("server_request_direct_tcpip: originator %s port %d, target %s port %d", |
71276795 | 812 | originator, originator_port, target, target_port); |
38c295d6 | 813 | |
e78a59f5 | 814 | /* XXX check permission */ |
6ae2364d | 815 | sock = channel_connect_to(target, target_port); |
816 | xfree(target); | |
e78a59f5 | 817 | xfree(originator); |
818 | if (sock < 0) | |
fa08c86b | 819 | return NULL; |
719fc62f | 820 | c = channel_new(ctype, SSH_CHANNEL_CONNECTING, |
bcbf86ec | 821 | sock, sock, -1, CHAN_TCP_WINDOW_DEFAULT, |
a22aff1f | 822 | CHAN_TCP_PACKET_DEFAULT, 0, xstrdup("direct-tcpip"), 1); |
719fc62f | 823 | if (c == NULL) { |
824 | error("server_request_direct_tcpip: channel_new failed"); | |
825 | close(sock); | |
826 | } | |
827 | return c; | |
fa08c86b | 828 | } |
829 | ||
396c147e | 830 | static Channel * |
fa08c86b | 831 | server_request_session(char *ctype) |
832 | { | |
719fc62f | 833 | Channel *c; |
fa08c86b | 834 | |
835 | debug("input_session_request"); | |
836 | packet_done(); | |
837 | /* | |
838 | * A server session has no fd to read or write until a | |
839 | * CHANNEL_REQUEST for a shell is made, so we set the type to | |
840 | * SSH_CHANNEL_LARVAL. Additionally, a callback for handling all | |
841 | * CHANNEL_REQUEST messages is registered. | |
842 | */ | |
719fc62f | 843 | c = channel_new(ctype, SSH_CHANNEL_LARVAL, |
844 | -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT, | |
fa08c86b | 845 | 0, xstrdup("server-session"), 1); |
719fc62f | 846 | if (c == NULL) { |
847 | error("server_request_session: channel_new failed"); | |
848 | return NULL; | |
849 | } | |
57156994 | 850 | if (session_open(xxx_authctxt, c->self) != 1) { |
719fc62f | 851 | debug("session open failed, free channel %d", c->self); |
852 | channel_free(c); | |
853 | return NULL; | |
fa08c86b | 854 | } |
719fc62f | 855 | channel_register_callback(c->self, SSH2_MSG_CHANNEL_REQUEST, |
856 | session_input_channel_req, (void *)0); | |
857 | channel_register_cleanup(c->self, session_close_by_channel); | |
858 | return c; | |
e78a59f5 | 859 | } |
860 | ||
396c147e | 861 | static void |
188adeb2 | 862 | server_input_channel_open(int type, int plen, void *ctxt) |
e78a59f5 | 863 | { |
864 | Channel *c = NULL; | |
865 | char *ctype; | |
1e3b8b07 | 866 | u_int len; |
e78a59f5 | 867 | int rchan; |
868 | int rmaxpack; | |
869 | int rwindow; | |
870 | ||
871 | ctype = packet_get_string(&len); | |
872 | rchan = packet_get_int(); | |
873 | rwindow = packet_get_int(); | |
874 | rmaxpack = packet_get_int(); | |
875 | ||
188adeb2 | 876 | debug("server_input_channel_open: ctype %s rchan %d win %d max %d", |
e78a59f5 | 877 | ctype, rchan, rwindow, rmaxpack); |
878 | ||
879 | if (strcmp(ctype, "session") == 0) { | |
fa08c86b | 880 | c = server_request_session(ctype); |
e78a59f5 | 881 | } else if (strcmp(ctype, "direct-tcpip") == 0) { |
fa08c86b | 882 | c = server_request_direct_tcpip(ctype); |
e78a59f5 | 883 | } |
884 | if (c != NULL) { | |
fa08c86b | 885 | debug("server_input_channel_open: confirm %s", ctype); |
e78a59f5 | 886 | c->remote_id = rchan; |
887 | c->remote_window = rwindow; | |
888 | c->remote_maxpacket = rmaxpack; | |
d18e0850 | 889 | if (c->type != SSH_CHANNEL_CONNECTING) { |
890 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
891 | packet_put_int(c->remote_id); | |
892 | packet_put_int(c->self); | |
893 | packet_put_int(c->local_window); | |
894 | packet_put_int(c->local_maxpacket); | |
895 | packet_send(); | |
896 | } | |
e78a59f5 | 897 | } else { |
fa08c86b | 898 | debug("server_input_channel_open: failure %s", ctype); |
e78a59f5 | 899 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); |
900 | packet_put_int(rchan); | |
901 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 902 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
d18e0850 | 903 | packet_put_cstring("open failed"); |
fbe90f7b | 904 | packet_put_cstring(""); |
905 | } | |
e78a59f5 | 906 | packet_send(); |
907 | } | |
908 | xfree(ctype); | |
909 | } | |
910 | ||
396c147e | 911 | static void |
fa08c86b | 912 | server_input_global_request(int type, int plen, void *ctxt) |
913 | { | |
914 | char *rtype; | |
915 | int want_reply; | |
916 | int success = 0; | |
917 | ||
918 | rtype = packet_get_string(NULL); | |
919 | want_reply = packet_get_char(); | |
920 | debug("server_input_global_request: rtype %s want_reply %d", rtype, want_reply); | |
2b87da3b | 921 | |
01794848 | 922 | /* -R style forwarding */ |
fa08c86b | 923 | if (strcmp(rtype, "tcpip-forward") == 0) { |
924 | struct passwd *pw; | |
925 | char *listen_address; | |
926 | u_short listen_port; | |
927 | ||
928 | pw = auth_get_user(); | |
929 | if (pw == NULL) | |
930 | fatal("server_input_global_request: no user"); | |
931 | listen_address = packet_get_string(NULL); /* XXX currently ignored */ | |
932 | listen_port = (u_short)packet_get_int(); | |
933 | debug("server_input_global_request: tcpip-forward listen %s port %d", | |
934 | listen_address, listen_port); | |
935 | ||
936 | /* check permissions */ | |
937 | if (!options.allow_tcp_forwarding || | |
938 | no_port_forwarding_flag || | |
939 | (listen_port < IPPORT_RESERVED && pw->pw_uid != 0)) { | |
940 | success = 0; | |
941 | packet_send_debug("Server has disabled port forwarding."); | |
942 | } else { | |
943 | /* Start listening on the port */ | |
02a024dd | 944 | success = channel_request_forwarding( |
fa08c86b | 945 | listen_address, listen_port, |
946 | /*unspec host_to_connect*/ "<unspec host>", | |
947 | /*unspec port_to_connect*/ 0, | |
948 | options.gateway_ports, /*remote*/ 1); | |
fa08c86b | 949 | } |
950 | xfree(listen_address); | |
951 | } | |
952 | if (want_reply) { | |
953 | packet_start(success ? | |
954 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
955 | packet_send(); | |
956 | packet_write_wait(); | |
957 | } | |
958 | xfree(rtype); | |
959 | } | |
960 | ||
396c147e | 961 | static void |
5ca51e19 | 962 | server_init_dispatch_20(void) |
e78a59f5 | 963 | { |
964 | debug("server_init_dispatch_20"); | |
965 | dispatch_init(&dispatch_protocol_error); | |
966 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); | |
967 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
968 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
969 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
970 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &server_input_channel_open); | |
971 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
972 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
973 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &channel_input_channel_request); | |
974 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); | |
fa08c86b | 975 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request); |
3ffc6336 | 976 | /* client_alive */ |
977 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_channel_failure); | |
7a37c112 | 978 | /* rekeying */ |
979 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e78a59f5 | 980 | } |
396c147e | 981 | static void |
5ca51e19 | 982 | server_init_dispatch_13(void) |
7368a6c8 | 983 | { |
984 | debug("server_init_dispatch_13"); | |
985 | dispatch_init(NULL); | |
986 | dispatch_set(SSH_CMSG_EOF, &server_input_eof); | |
987 | dispatch_set(SSH_CMSG_STDIN_DATA, &server_input_stdin_data); | |
988 | dispatch_set(SSH_CMSG_WINDOW_SIZE, &server_input_window_size); | |
989 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
990 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
991 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
992 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
993 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
994 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
995 | } | |
396c147e | 996 | static void |
5ca51e19 | 997 | server_init_dispatch_15(void) |
7368a6c8 | 998 | { |
999 | server_init_dispatch_13(); | |
1000 | debug("server_init_dispatch_15"); | |
1001 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
1002 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_oclose); | |
1003 | } | |
396c147e | 1004 | static void |
5ca51e19 | 1005 | server_init_dispatch(void) |
7368a6c8 | 1006 | { |
e78a59f5 | 1007 | if (compat20) |
1008 | server_init_dispatch_20(); | |
1009 | else if (compat13) | |
7368a6c8 | 1010 | server_init_dispatch_13(); |
1011 | else | |
1012 | server_init_dispatch_15(); | |
1013 | } |