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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" | |
c457707e | 38 | RCSID("$OpenBSD: serverloop.c,v 1.102 2002/06/11 05:46:20 mpech 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 | { | |
99416ceb | 212 | static int had_channel = 0; |
72176c0e | 213 | int id; |
214 | ||
99416ceb | 215 | id = channel_find_open(); |
216 | if (id == -1) { | |
217 | if (!had_channel) | |
218 | return; | |
219 | packet_disconnect("No open channels after timeout!"); | |
220 | } | |
221 | had_channel = 1; | |
222 | ||
72176c0e | 223 | /* timeout, check to see how many we have had */ |
224 | if (++client_alive_timeouts > options.client_alive_count_max) | |
225 | packet_disconnect("Timeout, your session not responding."); | |
226 | ||
72176c0e | 227 | /* |
228 | * send a bogus channel request with "wantreply", | |
229 | * we should get back a failure | |
230 | */ | |
231 | channel_request_start(id, "keepalive@openssh.com", 1); | |
232 | packet_send(); | |
233 | } | |
234 | ||
5260325f | 235 | /* |
236 | * Sleep in select() until we can do something. This will initialize the | |
237 | * select masks. Upon return, the masks will indicate which descriptors | |
238 | * have data or can accept data. Optionally, a maximum time can be specified | |
239 | * for the duration of the wait (0 = infinite). | |
240 | */ | |
396c147e | 241 | static void |
39929cdb | 242 | wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, int *maxfdp, |
489aa2e9 | 243 | int *nallocp, u_int max_time_milliseconds) |
8efc0c15 | 244 | { |
5260325f | 245 | struct timeval tv, *tvp; |
246 | int ret; | |
3ffc6336 | 247 | int client_alive_scheduled = 0; |
248 | ||
249 | /* | |
184eed6a | 250 | * if using client_alive, set the max timeout accordingly, |
3ffc6336 | 251 | * and indicate that this particular timeout was for client |
252 | * alive by setting the client_alive_scheduled flag. | |
253 | * | |
254 | * this could be randomized somewhat to make traffic | |
184eed6a | 255 | * analysis more difficult, but we're not doing it yet. |
3ffc6336 | 256 | */ |
2c5b1791 | 257 | if (compat20 && |
258 | max_time_milliseconds == 0 && options.client_alive_interval) { | |
39aefe7b | 259 | client_alive_scheduled = 1; |
3ffc6336 | 260 | max_time_milliseconds = options.client_alive_interval * 1000; |
2c5b1791 | 261 | } |
8efc0c15 | 262 | |
39929cdb | 263 | /* Allocate and update select() masks for channel descriptors. */ |
489aa2e9 | 264 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, 0); |
5260325f | 265 | |
e78a59f5 | 266 | if (compat20) { |
0c139bd1 | 267 | #if 0 |
1d1ffb87 | 268 | /* wrong: bad condition XXX */ |
e78a59f5 | 269 | if (channel_not_very_much_buffered_data()) |
0c139bd1 | 270 | #endif |
271 | FD_SET(connection_in, *readsetp); | |
e78a59f5 | 272 | } else { |
71276795 | 273 | /* |
274 | * Read packets from the client unless we have too much | |
275 | * buffered stdin or channel data. | |
276 | */ | |
277 | if (buffer_len(&stdin_buffer) < buffer_high && | |
e78a59f5 | 278 | channel_not_very_much_buffered_data()) |
39929cdb | 279 | FD_SET(connection_in, *readsetp); |
71276795 | 280 | /* |
281 | * If there is not too much data already buffered going to | |
282 | * the client, try to get some more data from the program. | |
283 | */ | |
284 | if (packet_not_very_much_data_to_write()) { | |
285 | if (!fdout_eof) | |
39929cdb | 286 | FD_SET(fdout, *readsetp); |
71276795 | 287 | if (!fderr_eof) |
39929cdb | 288 | FD_SET(fderr, *readsetp); |
71276795 | 289 | } |
290 | /* | |
291 | * If we have buffered data, try to write some of that data | |
292 | * to the program. | |
293 | */ | |
294 | if (fdin != -1 && buffer_len(&stdin_buffer) > 0) | |
39929cdb | 295 | FD_SET(fdin, *writesetp); |
e78a59f5 | 296 | } |
a10be357 | 297 | notify_prepare(*readsetp); |
5260325f | 298 | |
aa3378df | 299 | /* |
300 | * If we have buffered packet data going to the client, mark that | |
301 | * descriptor. | |
302 | */ | |
5260325f | 303 | if (packet_have_data_to_write()) |
39929cdb | 304 | FD_SET(connection_out, *writesetp); |
5260325f | 305 | |
aa3378df | 306 | /* |
307 | * If child has terminated and there is enough buffer space to read | |
308 | * from it, then read as much as is available and exit. | |
309 | */ | |
5260325f | 310 | if (child_terminated && packet_not_very_much_data_to_write()) |
3ffc6336 | 311 | if (max_time_milliseconds == 0 || client_alive_scheduled) |
5260325f | 312 | max_time_milliseconds = 100; |
313 | ||
314 | if (max_time_milliseconds == 0) | |
315 | tvp = NULL; | |
316 | else { | |
317 | tv.tv_sec = max_time_milliseconds / 1000; | |
318 | tv.tv_usec = 1000 * (max_time_milliseconds % 1000); | |
319 | tvp = &tv; | |
320 | } | |
8efc0c15 | 321 | |
5260325f | 322 | /* Wait for something to happen, or the timeout to expire. */ |
39929cdb | 323 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); |
8efc0c15 | 324 | |
3ffc6336 | 325 | if (ret == -1) { |
b3ad8fe6 | 326 | memset(*readsetp, 0, *nallocp); |
327 | memset(*writesetp, 0, *nallocp); | |
5260325f | 328 | if (errno != EINTR) |
329 | error("select: %.100s", strerror(errno)); | |
418e724c | 330 | } else if (ret == 0 && client_alive_scheduled) |
72176c0e | 331 | client_alive_check(); |
a10be357 | 332 | |
333 | notify_done(*readsetp); | |
8efc0c15 | 334 | } |
335 | ||
5260325f | 336 | /* |
337 | * Processes input from the client and the program. Input data is stored | |
338 | * in buffers and processed later. | |
339 | */ | |
396c147e | 340 | static void |
5260325f | 341 | process_input(fd_set * readset) |
342 | { | |
343 | int len; | |
344 | char buf[16384]; | |
345 | ||
346 | /* Read and buffer any input data from the client. */ | |
347 | if (FD_ISSET(connection_in, readset)) { | |
348 | len = read(connection_in, buf, sizeof(buf)); | |
349 | if (len == 0) { | |
350 | verbose("Connection closed by remote host."); | |
cc94bd38 | 351 | connection_closed = 1; |
352 | if (compat20) | |
353 | return; | |
5260325f | 354 | fatal_cleanup(); |
0e73cc53 | 355 | } else if (len < 0) { |
356 | if (errno != EINTR && errno != EAGAIN) { | |
357 | verbose("Read error from remote host: %.100s", strerror(errno)); | |
358 | fatal_cleanup(); | |
359 | } | |
360 | } else { | |
361 | /* Buffer any received data. */ | |
362 | packet_process_incoming(buf, len); | |
5260325f | 363 | } |
5260325f | 364 | } |
e78a59f5 | 365 | if (compat20) |
366 | return; | |
367 | ||
5260325f | 368 | /* Read and buffer any available stdout data from the program. */ |
369 | if (!fdout_eof && FD_ISSET(fdout, readset)) { | |
370 | len = read(fdout, buf, sizeof(buf)); | |
0e73cc53 | 371 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
372 | /* do nothing */ | |
373 | } else if (len <= 0) { | |
5260325f | 374 | fdout_eof = 1; |
0e73cc53 | 375 | } else { |
5260325f | 376 | buffer_append(&stdout_buffer, buf, len); |
377 | fdout_bytes += len; | |
378 | } | |
379 | } | |
380 | /* Read and buffer any available stderr data from the program. */ | |
381 | if (!fderr_eof && FD_ISSET(fderr, readset)) { | |
382 | len = read(fderr, buf, sizeof(buf)); | |
0e73cc53 | 383 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
384 | /* do nothing */ | |
385 | } else if (len <= 0) { | |
5260325f | 386 | fderr_eof = 1; |
0e73cc53 | 387 | } else { |
5260325f | 388 | buffer_append(&stderr_buffer, buf, len); |
0e73cc53 | 389 | } |
5260325f | 390 | } |
391 | } | |
8efc0c15 | 392 | |
5260325f | 393 | /* |
394 | * Sends data from internal buffers to client program stdin. | |
395 | */ | |
396c147e | 396 | static void |
5260325f | 397 | process_output(fd_set * writeset) |
8efc0c15 | 398 | { |
4ef922e3 | 399 | struct termios tio; |
780a9951 | 400 | u_char *data; |
401 | u_int dlen; | |
5260325f | 402 | int len; |
403 | ||
404 | /* Write buffered data to program stdin. */ | |
e78a59f5 | 405 | if (!compat20 && fdin != -1 && FD_ISSET(fdin, writeset)) { |
780a9951 | 406 | data = buffer_ptr(&stdin_buffer); |
407 | dlen = buffer_len(&stdin_buffer); | |
408 | len = write(fdin, data, dlen); | |
0e73cc53 | 409 | if (len < 0 && (errno == EINTR || errno == EAGAIN)) { |
410 | /* do nothing */ | |
411 | } else if (len <= 0) { | |
7368a6c8 | 412 | if (fdin != fdout) |
5260325f | 413 | close(fdin); |
414 | else | |
415 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
5260325f | 416 | fdin = -1; |
417 | } else { | |
4ef922e3 | 418 | /* Successful write. */ |
780a9951 | 419 | if (fdin_is_tty && dlen >= 1 && data[0] != '\r' && |
420 | tcgetattr(fdin, &tio) == 0 && | |
0ae4fe1d | 421 | !(tio.c_lflag & ECHO) && (tio.c_lflag & ICANON)) { |
62da27dd | 422 | /* |
423 | * Simulate echo to reduce the impact of | |
424 | * traffic analysis | |
425 | */ | |
95ce5599 | 426 | packet_send_ignore(len); |
4ef922e3 | 427 | packet_send(); |
428 | } | |
429 | /* Consume the data from the buffer. */ | |
5260325f | 430 | buffer_consume(&stdin_buffer, len); |
431 | /* Update the count of bytes written to the program. */ | |
432 | stdin_bytes += len; | |
433 | } | |
8efc0c15 | 434 | } |
5260325f | 435 | /* Send any buffered packet data to the client. */ |
436 | if (FD_ISSET(connection_out, writeset)) | |
437 | packet_write_poll(); | |
8efc0c15 | 438 | } |
439 | ||
5260325f | 440 | /* |
441 | * Wait until all buffered output has been sent to the client. | |
442 | * This is used when the program terminates. | |
443 | */ | |
396c147e | 444 | static void |
5ca51e19 | 445 | drain_output(void) |
8efc0c15 | 446 | { |
5260325f | 447 | /* Send any buffered stdout data to the client. */ |
448 | if (buffer_len(&stdout_buffer) > 0) { | |
449 | packet_start(SSH_SMSG_STDOUT_DATA); | |
450 | packet_put_string(buffer_ptr(&stdout_buffer), | |
451 | buffer_len(&stdout_buffer)); | |
452 | packet_send(); | |
453 | /* Update the count of sent bytes. */ | |
454 | stdout_bytes += buffer_len(&stdout_buffer); | |
455 | } | |
456 | /* Send any buffered stderr data to the client. */ | |
457 | if (buffer_len(&stderr_buffer) > 0) { | |
458 | packet_start(SSH_SMSG_STDERR_DATA); | |
459 | packet_put_string(buffer_ptr(&stderr_buffer), | |
460 | buffer_len(&stderr_buffer)); | |
461 | packet_send(); | |
462 | /* Update the count of sent bytes. */ | |
463 | stderr_bytes += buffer_len(&stderr_buffer); | |
464 | } | |
465 | /* Wait until all buffered data has been written to the client. */ | |
466 | packet_write_wait(); | |
8efc0c15 | 467 | } |
468 | ||
396c147e | 469 | static void |
5ca51e19 | 470 | process_buffered_input_packets(void) |
7368a6c8 | 471 | { |
7a37c112 | 472 | dispatch_run(DISPATCH_NONBLOCK, NULL, compat20 ? xxx_kex : NULL); |
7368a6c8 | 473 | } |
474 | ||
5260325f | 475 | /* |
476 | * Performs the interactive session. This handles data transmission between | |
477 | * the client and the program. Note that the notion of stdin, stdout, and | |
478 | * stderr in this function is sort of reversed: this function writes to | |
479 | * stdin (of the child program), and reads from stdout and stderr (of the | |
480 | * child program). | |
481 | */ | |
6ae2364d | 482 | void |
9da5c3c9 | 483 | server_loop(pid_t pid, int fdin_arg, int fdout_arg, int fderr_arg) |
8efc0c15 | 484 | { |
39929cdb | 485 | fd_set *readset = NULL, *writeset = NULL; |
489aa2e9 | 486 | int max_fd = 0, nalloc = 0; |
9da5c3c9 | 487 | int wait_status; /* Status returned by wait(). */ |
488 | pid_t wait_pid; /* pid returned by wait(). */ | |
5260325f | 489 | int waiting_termination = 0; /* Have displayed waiting close message. */ |
1e3b8b07 | 490 | u_int max_time_milliseconds; |
491 | u_int previous_stdout_buffer_bytes; | |
492 | u_int stdout_buffer_bytes; | |
5260325f | 493 | int type; |
494 | ||
495 | debug("Entering interactive session."); | |
496 | ||
497 | /* Initialize the SIGCHLD kludge. */ | |
5260325f | 498 | child_terminated = 0; |
42ad0eec | 499 | mysignal(SIGCHLD, sigchld_handler); |
5260325f | 500 | |
501 | /* Initialize our global variables. */ | |
502 | fdin = fdin_arg; | |
503 | fdout = fdout_arg; | |
504 | fderr = fderr_arg; | |
0e73cc53 | 505 | |
506 | /* nonblocking IO */ | |
507 | set_nonblock(fdin); | |
508 | set_nonblock(fdout); | |
ff873e98 | 509 | /* we don't have stderr for interactive terminal sessions, see below */ |
510 | if (fderr != -1) | |
511 | set_nonblock(fderr); | |
0e73cc53 | 512 | |
e68225b2 | 513 | if (!(datafellows & SSH_BUG_IGNOREMSG) && isatty(fdin)) |
514 | fdin_is_tty = 1; | |
515 | ||
5260325f | 516 | connection_in = packet_get_connection_in(); |
517 | connection_out = packet_get_connection_out(); | |
518 | ||
a10be357 | 519 | notify_setup(); |
520 | ||
5260325f | 521 | previous_stdout_buffer_bytes = 0; |
522 | ||
523 | /* Set approximate I/O buffer size. */ | |
524 | if (packet_is_interactive()) | |
525 | buffer_high = 4096; | |
526 | else | |
527 | buffer_high = 64 * 1024; | |
528 | ||
489aa2e9 | 529 | #if 0 |
5260325f | 530 | /* Initialize max_fd to the maximum of the known file descriptors. */ |
489aa2e9 | 531 | max_fd = MAX(connection_in, connection_out); |
532 | max_fd = MAX(max_fd, fdin); | |
533 | max_fd = MAX(max_fd, fdout); | |
39929cdb | 534 | if (fderr != -1) |
535 | max_fd = MAX(max_fd, fderr); | |
489aa2e9 | 536 | #endif |
5260325f | 537 | |
538 | /* Initialize Initialize buffers. */ | |
539 | buffer_init(&stdin_buffer); | |
540 | buffer_init(&stdout_buffer); | |
541 | buffer_init(&stderr_buffer); | |
542 | ||
aa3378df | 543 | /* |
544 | * If we have no separate fderr (which is the case when we have a pty | |
545 | * - there we cannot make difference between data sent to stdout and | |
546 | * stderr), indicate that we have seen an EOF from stderr. This way | |
547 | * we don\'t need to check the descriptor everywhere. | |
548 | */ | |
5260325f | 549 | if (fderr == -1) |
550 | fderr_eof = 1; | |
551 | ||
7368a6c8 | 552 | server_init_dispatch(); |
553 | ||
5260325f | 554 | /* Main loop of the server for the interactive session mode. */ |
555 | for (;;) { | |
5260325f | 556 | |
557 | /* Process buffered packets from the client. */ | |
558 | process_buffered_input_packets(); | |
559 | ||
aa3378df | 560 | /* |
561 | * If we have received eof, and there is no more pending | |
562 | * input data, cause a real eof by closing fdin. | |
563 | */ | |
5260325f | 564 | if (stdin_eof && fdin != -1 && buffer_len(&stdin_buffer) == 0) { |
7368a6c8 | 565 | if (fdin != fdout) |
5260325f | 566 | close(fdin); |
567 | else | |
568 | shutdown(fdin, SHUT_WR); /* We will no longer send. */ | |
5260325f | 569 | fdin = -1; |
570 | } | |
aa3378df | 571 | /* Make packets from buffered stderr data to send to the client. */ |
5260325f | 572 | make_packets_from_stderr_data(); |
573 | ||
aa3378df | 574 | /* |
575 | * Make packets from buffered stdout data to send to the | |
576 | * client. If there is very little to send, this arranges to | |
577 | * not send them now, but to wait a short while to see if we | |
578 | * are getting more data. This is necessary, as some systems | |
579 | * wake up readers from a pty after each separate character. | |
580 | */ | |
5260325f | 581 | max_time_milliseconds = 0; |
582 | stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
583 | if (stdout_buffer_bytes != 0 && stdout_buffer_bytes < 256 && | |
584 | stdout_buffer_bytes != previous_stdout_buffer_bytes) { | |
585 | /* try again after a while */ | |
586 | max_time_milliseconds = 10; | |
587 | } else { | |
588 | /* Send it now. */ | |
589 | make_packets_from_stdout_data(); | |
590 | } | |
591 | previous_stdout_buffer_bytes = buffer_len(&stdout_buffer); | |
592 | ||
593 | /* Send channel data to the client. */ | |
594 | if (packet_not_very_much_data_to_write()) | |
595 | channel_output_poll(); | |
596 | ||
aa3378df | 597 | /* |
598 | * Bail out of the loop if the program has closed its output | |
599 | * descriptors, and we have no more data to send to the | |
600 | * client, and there is no pending buffered data. | |
601 | */ | |
7062c40f | 602 | if (fdout_eof && fderr_eof && !packet_have_data_to_write() && |
603 | buffer_len(&stdout_buffer) == 0 && buffer_len(&stderr_buffer) == 0) { | |
5260325f | 604 | if (!channel_still_open()) |
7368a6c8 | 605 | break; |
5260325f | 606 | if (!waiting_termination) { |
607 | const char *s = "Waiting for forwarded connections to terminate...\r\n"; | |
608 | char *cp; | |
609 | waiting_termination = 1; | |
610 | buffer_append(&stderr_buffer, s, strlen(s)); | |
611 | ||
612 | /* Display list of open channels. */ | |
613 | cp = channel_open_message(); | |
614 | buffer_append(&stderr_buffer, cp, strlen(cp)); | |
615 | xfree(cp); | |
616 | } | |
617 | } | |
489aa2e9 | 618 | max_fd = MAX(connection_in, connection_out); |
619 | max_fd = MAX(max_fd, fdin); | |
620 | max_fd = MAX(max_fd, fdout); | |
621 | max_fd = MAX(max_fd, fderr); | |
a10be357 | 622 | max_fd = MAX(max_fd, notify_pipe[0]); |
489aa2e9 | 623 | |
5260325f | 624 | /* Sleep in select() until we can do something. */ |
39929cdb | 625 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 626 | &nalloc, max_time_milliseconds); |
5260325f | 627 | |
628 | /* Process any channel events. */ | |
39929cdb | 629 | channel_after_select(readset, writeset); |
5260325f | 630 | |
631 | /* Process input from the client and from program stdout/stderr. */ | |
39929cdb | 632 | process_input(readset); |
5260325f | 633 | |
634 | /* Process output to the client and to program stdin. */ | |
39929cdb | 635 | process_output(writeset); |
8efc0c15 | 636 | } |
39929cdb | 637 | if (readset) |
638 | xfree(readset); | |
639 | if (writeset) | |
640 | xfree(writeset); | |
8efc0c15 | 641 | |
5260325f | 642 | /* Cleanup and termination code. */ |
8efc0c15 | 643 | |
5260325f | 644 | /* Wait until all output has been sent to the client. */ |
645 | drain_output(); | |
8efc0c15 | 646 | |
5260325f | 647 | debug("End of interactive session; stdin %ld, stdout (read %ld, sent %ld), stderr %ld bytes.", |
184eed6a | 648 | stdin_bytes, fdout_bytes, stdout_bytes, stderr_bytes); |
8efc0c15 | 649 | |
5260325f | 650 | /* Free and clear the buffers. */ |
651 | buffer_free(&stdin_buffer); | |
652 | buffer_free(&stdout_buffer); | |
653 | buffer_free(&stderr_buffer); | |
8efc0c15 | 654 | |
5260325f | 655 | /* Close the file descriptors. */ |
656 | if (fdout != -1) | |
657 | close(fdout); | |
658 | fdout = -1; | |
659 | fdout_eof = 1; | |
660 | if (fderr != -1) | |
661 | close(fderr); | |
662 | fderr = -1; | |
663 | fderr_eof = 1; | |
664 | if (fdin != -1) | |
665 | close(fdin); | |
666 | fdin = -1; | |
667 | ||
d6746a0b | 668 | channel_free_all(); |
5260325f | 669 | |
5260325f | 670 | /* We no longer want our SIGCHLD handler to be called. */ |
42ad0eec | 671 | mysignal(SIGCHLD, SIG_DFL); |
5260325f | 672 | |
8c38e88b | 673 | while ((wait_pid = waitpid(-1, &wait_status, 0)) < 0) |
674 | if (errno != EINTR) | |
675 | packet_disconnect("wait: %.100s", strerror(errno)); | |
676 | if (wait_pid != pid) | |
c457707e | 677 | error("Strange, wait returned pid %ld, expected %ld", |
678 | (long)wait_pid, (long)pid); | |
c9130033 | 679 | |
5260325f | 680 | /* Check if it exited normally. */ |
681 | if (WIFEXITED(wait_status)) { | |
682 | /* Yes, normal exit. Get exit status and send it to the client. */ | |
683 | debug("Command exited with status %d.", WEXITSTATUS(wait_status)); | |
684 | packet_start(SSH_SMSG_EXITSTATUS); | |
685 | packet_put_int(WEXITSTATUS(wait_status)); | |
686 | packet_send(); | |
687 | packet_write_wait(); | |
688 | ||
aa3378df | 689 | /* |
690 | * Wait for exit confirmation. Note that there might be | |
691 | * other packets coming before it; however, the program has | |
692 | * already died so we just ignore them. The client is | |
693 | * supposed to respond with the confirmation when it receives | |
694 | * the exit status. | |
695 | */ | |
5260325f | 696 | do { |
54a5250f | 697 | type = packet_read(); |
5260325f | 698 | } |
699 | while (type != SSH_CMSG_EXIT_CONFIRMATION); | |
700 | ||
701 | debug("Received exit confirmation."); | |
702 | return; | |
703 | } | |
704 | /* Check if the program terminated due to a signal. */ | |
705 | if (WIFSIGNALED(wait_status)) | |
706 | packet_disconnect("Command terminated on signal %d.", | |
707 | WTERMSIG(wait_status)); | |
708 | ||
709 | /* Some weird exit cause. Just exit. */ | |
710 | packet_disconnect("wait returned status %04x.", wait_status); | |
711 | /* NOTREACHED */ | |
712 | } | |
7368a6c8 | 713 | |
418e724c | 714 | static void |
715 | collect_children(void) | |
716 | { | |
717 | pid_t pid; | |
718 | sigset_t oset, nset; | |
719 | int status; | |
720 | ||
721 | /* block SIGCHLD while we check for dead children */ | |
722 | sigemptyset(&nset); | |
723 | sigaddset(&nset, SIGCHLD); | |
724 | sigprocmask(SIG_BLOCK, &nset, &oset); | |
725 | if (child_terminated) { | |
8c38e88b | 726 | while ((pid = waitpid(-1, &status, WNOHANG)) > 0 || |
727 | (pid < 0 && errno == EINTR)) | |
728 | if (pid > 0) | |
729 | session_close_by_pid(pid, status); | |
418e724c | 730 | child_terminated = 0; |
731 | } | |
732 | sigprocmask(SIG_SETMASK, &oset, NULL); | |
733 | } | |
734 | ||
6ae2364d | 735 | void |
57156994 | 736 | server_loop2(Authctxt *authctxt) |
e78a59f5 | 737 | { |
39929cdb | 738 | fd_set *readset = NULL, *writeset = NULL; |
418e724c | 739 | int rekeying = 0, max_fd, nalloc = 0; |
e78a59f5 | 740 | |
741 | debug("Entering interactive session for SSH2."); | |
742 | ||
c9130033 | 743 | mysignal(SIGCHLD, sigchld_handler); |
e78a59f5 | 744 | child_terminated = 0; |
745 | connection_in = packet_get_connection_in(); | |
746 | connection_out = packet_get_connection_out(); | |
39929cdb | 747 | |
a10be357 | 748 | notify_setup(); |
749 | ||
39929cdb | 750 | max_fd = MAX(connection_in, connection_out); |
a10be357 | 751 | max_fd = MAX(max_fd, notify_pipe[0]); |
752 | ||
57156994 | 753 | xxx_authctxt = authctxt; |
39929cdb | 754 | |
e78a59f5 | 755 | server_init_dispatch(); |
756 | ||
757 | for (;;) { | |
758 | process_buffered_input_packets(); | |
bbb4cc1b | 759 | |
cd332296 | 760 | rekeying = (xxx_kex != NULL && !xxx_kex->done); |
bbb4cc1b | 761 | |
bbb4cc1b | 762 | if (!rekeying && packet_not_very_much_data_to_write()) |
e78a59f5 | 763 | channel_output_poll(); |
bbb4cc1b | 764 | wait_until_can_do_something(&readset, &writeset, &max_fd, |
489aa2e9 | 765 | &nalloc, 0); |
d5f24f94 | 766 | |
418e724c | 767 | collect_children(); |
bbb4cc1b | 768 | if (!rekeying) |
769 | channel_after_select(readset, writeset); | |
39929cdb | 770 | process_input(readset); |
cc94bd38 | 771 | if (connection_closed) |
772 | break; | |
39929cdb | 773 | process_output(writeset); |
e78a59f5 | 774 | } |
418e724c | 775 | collect_children(); |
776 | ||
39929cdb | 777 | if (readset) |
778 | xfree(readset); | |
779 | if (writeset) | |
780 | xfree(writeset); | |
781 | ||
d5f24f94 | 782 | /* free all channels, no more reads and writes */ |
783 | channel_free_all(); | |
5b5d170c | 784 | |
418e724c | 785 | /* free remaining sessions, e.g. remove wtmp entries */ |
1853d1ef | 786 | session_destroy_all(NULL); |
e78a59f5 | 787 | } |
788 | ||
396c147e | 789 | static void |
7819b5c3 | 790 | server_input_channel_failure(int type, u_int32_t seq, void *ctxt) |
3ffc6336 | 791 | { |
792 | debug("Got CHANNEL_FAILURE for keepalive"); | |
184eed6a | 793 | /* |
39aefe7b | 794 | * reset timeout, since we got a sane answer from the client. |
3ffc6336 | 795 | * even if this was generated by something other than |
796 | * the bogus CHANNEL_REQUEST we send for keepalives. | |
797 | */ | |
184eed6a | 798 | client_alive_timeouts = 0; |
3ffc6336 | 799 | } |
800 | ||
801 | ||
396c147e | 802 | static void |
7819b5c3 | 803 | server_input_stdin_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 804 | { |
805 | char *data; | |
1e3b8b07 | 806 | u_int data_len; |
7368a6c8 | 807 | |
808 | /* Stdin data from the client. Append it to the buffer. */ | |
809 | /* Ignore any data if the client has closed stdin. */ | |
810 | if (fdin == -1) | |
811 | return; | |
812 | data = packet_get_string(&data_len); | |
95500969 | 813 | packet_check_eom(); |
7368a6c8 | 814 | buffer_append(&stdin_buffer, data, data_len); |
815 | memset(data, 0, data_len); | |
816 | xfree(data); | |
817 | } | |
818 | ||
396c147e | 819 | static void |
7819b5c3 | 820 | server_input_eof(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 821 | { |
822 | /* | |
823 | * Eof from the client. The stdin descriptor to the | |
824 | * program will be closed when all buffered data has | |
825 | * drained. | |
826 | */ | |
827 | debug("EOF received for stdin."); | |
95500969 | 828 | packet_check_eom(); |
7368a6c8 | 829 | stdin_eof = 1; |
830 | } | |
831 | ||
396c147e | 832 | static void |
7819b5c3 | 833 | server_input_window_size(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 834 | { |
835 | int row = packet_get_int(); | |
836 | int col = packet_get_int(); | |
837 | int xpixel = packet_get_int(); | |
838 | int ypixel = packet_get_int(); | |
839 | ||
840 | debug("Window change received."); | |
95500969 | 841 | packet_check_eom(); |
7368a6c8 | 842 | if (fdin != -1) |
843 | pty_change_window_size(fdin, row, col, xpixel, ypixel); | |
844 | } | |
845 | ||
396c147e | 846 | static Channel * |
fa08c86b | 847 | server_request_direct_tcpip(char *ctype) |
e78a59f5 | 848 | { |
719fc62f | 849 | Channel *c; |
850 | int sock; | |
6ae2364d | 851 | char *target, *originator; |
852 | int target_port, originator_port; | |
e78a59f5 | 853 | |
6ae2364d | 854 | target = packet_get_string(NULL); |
855 | target_port = packet_get_int(); | |
e78a59f5 | 856 | originator = packet_get_string(NULL); |
857 | originator_port = packet_get_int(); | |
95500969 | 858 | packet_check_eom(); |
71276795 | 859 | |
fa08c86b | 860 | debug("server_request_direct_tcpip: originator %s port %d, target %s port %d", |
71276795 | 861 | originator, originator_port, target, target_port); |
38c295d6 | 862 | |
e78a59f5 | 863 | /* XXX check permission */ |
6ae2364d | 864 | sock = channel_connect_to(target, target_port); |
865 | xfree(target); | |
e78a59f5 | 866 | xfree(originator); |
867 | if (sock < 0) | |
fa08c86b | 868 | return NULL; |
719fc62f | 869 | c = channel_new(ctype, SSH_CHANNEL_CONNECTING, |
bcbf86ec | 870 | sock, sock, -1, CHAN_TCP_WINDOW_DEFAULT, |
a22aff1f | 871 | CHAN_TCP_PACKET_DEFAULT, 0, xstrdup("direct-tcpip"), 1); |
719fc62f | 872 | return c; |
fa08c86b | 873 | } |
874 | ||
396c147e | 875 | static Channel * |
fa08c86b | 876 | server_request_session(char *ctype) |
877 | { | |
719fc62f | 878 | Channel *c; |
fa08c86b | 879 | |
880 | debug("input_session_request"); | |
95500969 | 881 | packet_check_eom(); |
fa08c86b | 882 | /* |
883 | * A server session has no fd to read or write until a | |
884 | * CHANNEL_REQUEST for a shell is made, so we set the type to | |
885 | * SSH_CHANNEL_LARVAL. Additionally, a callback for handling all | |
886 | * CHANNEL_REQUEST messages is registered. | |
887 | */ | |
719fc62f | 888 | c = channel_new(ctype, SSH_CHANNEL_LARVAL, |
889 | -1, -1, -1, /*window size*/0, CHAN_SES_PACKET_DEFAULT, | |
fa08c86b | 890 | 0, xstrdup("server-session"), 1); |
57156994 | 891 | if (session_open(xxx_authctxt, c->self) != 1) { |
719fc62f | 892 | debug("session open failed, free channel %d", c->self); |
893 | channel_free(c); | |
894 | return NULL; | |
fa08c86b | 895 | } |
719fc62f | 896 | channel_register_cleanup(c->self, session_close_by_channel); |
897 | return c; | |
e78a59f5 | 898 | } |
899 | ||
396c147e | 900 | static void |
7819b5c3 | 901 | server_input_channel_open(int type, u_int32_t seq, void *ctxt) |
e78a59f5 | 902 | { |
903 | Channel *c = NULL; | |
904 | char *ctype; | |
1e3b8b07 | 905 | u_int len; |
e78a59f5 | 906 | int rchan; |
907 | int rmaxpack; | |
908 | int rwindow; | |
909 | ||
910 | ctype = packet_get_string(&len); | |
911 | rchan = packet_get_int(); | |
912 | rwindow = packet_get_int(); | |
913 | rmaxpack = packet_get_int(); | |
914 | ||
188adeb2 | 915 | debug("server_input_channel_open: ctype %s rchan %d win %d max %d", |
e78a59f5 | 916 | ctype, rchan, rwindow, rmaxpack); |
917 | ||
918 | if (strcmp(ctype, "session") == 0) { | |
fa08c86b | 919 | c = server_request_session(ctype); |
e78a59f5 | 920 | } else if (strcmp(ctype, "direct-tcpip") == 0) { |
fa08c86b | 921 | c = server_request_direct_tcpip(ctype); |
e78a59f5 | 922 | } |
923 | if (c != NULL) { | |
fa08c86b | 924 | debug("server_input_channel_open: confirm %s", ctype); |
e78a59f5 | 925 | c->remote_id = rchan; |
926 | c->remote_window = rwindow; | |
927 | c->remote_maxpacket = rmaxpack; | |
d18e0850 | 928 | if (c->type != SSH_CHANNEL_CONNECTING) { |
929 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
930 | packet_put_int(c->remote_id); | |
931 | packet_put_int(c->self); | |
932 | packet_put_int(c->local_window); | |
933 | packet_put_int(c->local_maxpacket); | |
934 | packet_send(); | |
935 | } | |
e78a59f5 | 936 | } else { |
fa08c86b | 937 | debug("server_input_channel_open: failure %s", ctype); |
e78a59f5 | 938 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); |
939 | packet_put_int(rchan); | |
940 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 941 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
d18e0850 | 942 | packet_put_cstring("open failed"); |
fbe90f7b | 943 | packet_put_cstring(""); |
944 | } | |
e78a59f5 | 945 | packet_send(); |
946 | } | |
947 | xfree(ctype); | |
948 | } | |
949 | ||
396c147e | 950 | static void |
7819b5c3 | 951 | server_input_global_request(int type, u_int32_t seq, void *ctxt) |
fa08c86b | 952 | { |
953 | char *rtype; | |
954 | int want_reply; | |
955 | int success = 0; | |
956 | ||
957 | rtype = packet_get_string(NULL); | |
958 | want_reply = packet_get_char(); | |
959 | debug("server_input_global_request: rtype %s want_reply %d", rtype, want_reply); | |
2b87da3b | 960 | |
01794848 | 961 | /* -R style forwarding */ |
fa08c86b | 962 | if (strcmp(rtype, "tcpip-forward") == 0) { |
963 | struct passwd *pw; | |
964 | char *listen_address; | |
965 | u_short listen_port; | |
966 | ||
967 | pw = auth_get_user(); | |
968 | if (pw == NULL) | |
969 | fatal("server_input_global_request: no user"); | |
970 | listen_address = packet_get_string(NULL); /* XXX currently ignored */ | |
971 | listen_port = (u_short)packet_get_int(); | |
972 | debug("server_input_global_request: tcpip-forward listen %s port %d", | |
973 | listen_address, listen_port); | |
974 | ||
975 | /* check permissions */ | |
976 | if (!options.allow_tcp_forwarding || | |
977 | no_port_forwarding_flag || | |
978 | (listen_port < IPPORT_RESERVED && pw->pw_uid != 0)) { | |
979 | success = 0; | |
980 | packet_send_debug("Server has disabled port forwarding."); | |
981 | } else { | |
982 | /* Start listening on the port */ | |
5641aefa | 983 | success = channel_setup_remote_fwd_listener( |
984 | listen_address, listen_port, options.gateway_ports); | |
fa08c86b | 985 | } |
986 | xfree(listen_address); | |
987 | } | |
988 | if (want_reply) { | |
989 | packet_start(success ? | |
990 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
991 | packet_send(); | |
992 | packet_write_wait(); | |
993 | } | |
994 | xfree(rtype); | |
995 | } | |
7899c98f | 996 | static void |
997 | server_input_channel_req(int type, u_int32_t seq, void *ctxt) | |
998 | { | |
999 | Channel *c; | |
1000 | int id, reply, success = 0; | |
1001 | char *rtype; | |
1002 | ||
1003 | id = packet_get_int(); | |
1004 | rtype = packet_get_string(NULL); | |
1005 | reply = packet_get_char(); | |
1006 | ||
1007 | debug("server_input_channel_req: channel %d request %s reply %d", | |
1008 | id, rtype, reply); | |
1009 | ||
1010 | if ((c = channel_lookup(id)) == NULL) | |
1011 | packet_disconnect("server_input_channel_req: " | |
1012 | "unknown channel %d", id); | |
1013 | if (c->type == SSH_CHANNEL_LARVAL || c->type == SSH_CHANNEL_OPEN) | |
1014 | success = session_input_channel_req(c, rtype); | |
1015 | if (reply) { | |
1016 | packet_start(success ? | |
1017 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
1018 | packet_put_int(c->remote_id); | |
1019 | packet_send(); | |
1020 | } | |
1021 | xfree(rtype); | |
1022 | } | |
fa08c86b | 1023 | |
396c147e | 1024 | static void |
5ca51e19 | 1025 | server_init_dispatch_20(void) |
e78a59f5 | 1026 | { |
1027 | debug("server_init_dispatch_20"); | |
1028 | dispatch_init(&dispatch_protocol_error); | |
1029 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); | |
1030 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
1031 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
1032 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
1033 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &server_input_channel_open); | |
1034 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
1035 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
7899c98f | 1036 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &server_input_channel_req); |
e78a59f5 | 1037 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
fa08c86b | 1038 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &server_input_global_request); |
3ffc6336 | 1039 | /* client_alive */ |
1040 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &server_input_channel_failure); | |
7a37c112 | 1041 | /* rekeying */ |
1042 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e78a59f5 | 1043 | } |
396c147e | 1044 | static void |
5ca51e19 | 1045 | server_init_dispatch_13(void) |
7368a6c8 | 1046 | { |
1047 | debug("server_init_dispatch_13"); | |
1048 | dispatch_init(NULL); | |
1049 | dispatch_set(SSH_CMSG_EOF, &server_input_eof); | |
1050 | dispatch_set(SSH_CMSG_STDIN_DATA, &server_input_stdin_data); | |
1051 | dispatch_set(SSH_CMSG_WINDOW_SIZE, &server_input_window_size); | |
1052 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
1053 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
1054 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
1055 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); | |
1056 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1057 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
1058 | } | |
396c147e | 1059 | static void |
5ca51e19 | 1060 | server_init_dispatch_15(void) |
7368a6c8 | 1061 | { |
1062 | server_init_dispatch_13(); | |
1063 | debug("server_init_dispatch_15"); | |
1064 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
1065 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_oclose); | |
1066 | } | |
396c147e | 1067 | static void |
5ca51e19 | 1068 | server_init_dispatch(void) |
7368a6c8 | 1069 | { |
e78a59f5 | 1070 | if (compat20) |
1071 | server_init_dispatch_20(); | |
1072 | else if (compat13) | |
7368a6c8 | 1073 | server_init_dispatch_13(); |
1074 | else | |
1075 | server_init_dispatch_15(); | |
1076 | } |