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07d8d480 | 1 | /* $OpenBSD: clientloop.c,v 1.199 2008/06/12 21:06:25 djm Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
5 | * All rights reserved | |
bcbf86ec | 6 | * The main loop for the interactive session (client side). |
6ae2364d | 7 | * |
bcbf86ec | 8 | * As far as I am concerned, the code I have written for this software |
9 | * can be used freely for any purpose. Any derived versions of this | |
10 | * software must be clearly marked as such, and if the derived work is | |
11 | * incompatible with the protocol description in the RFC file, it must be | |
12 | * called by a name other than "ssh" or "Secure Shell". | |
6ae2364d | 13 | * |
6ae2364d | 14 | * |
bcbf86ec | 15 | * Copyright (c) 1999 Theo de Raadt. All rights reserved. |
16 | * | |
17 | * Redistribution and use in source and binary forms, with or without | |
18 | * modification, are permitted provided that the following conditions | |
19 | * are met: | |
20 | * 1. Redistributions of source code must retain the above copyright | |
21 | * notice, this list of conditions and the following disclaimer. | |
22 | * 2. Redistributions in binary form must reproduce the above copyright | |
23 | * notice, this list of conditions and the following disclaimer in the | |
24 | * documentation and/or other materials provided with the distribution. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
27 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
28 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
29 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
30 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
31 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
32 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
33 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
34 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
35 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | * | |
6ae2364d | 37 | * |
8ce64345 | 38 | * SSH2 support added by Markus Friedl. |
a96070d4 | 39 | * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 40 | * |
41 | * Redistribution and use in source and binary forms, with or without | |
42 | * modification, are permitted provided that the following conditions | |
43 | * are met: | |
44 | * 1. Redistributions of source code must retain the above copyright | |
45 | * notice, this list of conditions and the following disclaimer. | |
46 | * 2. Redistributions in binary form must reproduce the above copyright | |
47 | * notice, this list of conditions and the following disclaimer in the | |
48 | * documentation and/or other materials provided with the distribution. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
51 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
52 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
53 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
54 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
55 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
56 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
57 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
58 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
59 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
5260325f | 60 | */ |
8efc0c15 | 61 | |
62 | #include "includes.h" | |
bd7c69ea | 63 | |
4095f623 | 64 | #include <sys/types.h> |
e264ac72 | 65 | #include <sys/ioctl.h> |
536c14e8 | 66 | #include <sys/param.h> |
4095f623 | 67 | #ifdef HAVE_SYS_STAT_H |
68 | # include <sys/stat.h> | |
69 | #endif | |
e264ac72 | 70 | #ifdef HAVE_SYS_TIME_H |
71 | # include <sys/time.h> | |
72 | #endif | |
5b04a8bf | 73 | #include <sys/socket.h> |
1d3e026f | 74 | |
b6438382 | 75 | #include <ctype.h> |
028094f4 | 76 | #include <errno.h> |
b5b88c19 | 77 | #ifdef HAVE_PATHS_H |
a75f5360 | 78 | #include <paths.h> |
b5b88c19 | 79 | #endif |
ada68823 | 80 | #include <signal.h> |
24436b92 | 81 | #include <stdarg.h> |
cf851879 | 82 | #include <stdio.h> |
ffa517a8 | 83 | #include <stdlib.h> |
00146caa | 84 | #include <string.h> |
1d3e026f | 85 | #include <termios.h> |
31652869 | 86 | #include <pwd.h> |
5188ba17 | 87 | #include <unistd.h> |
8efc0c15 | 88 | |
3593bdc0 | 89 | #include "openbsd-compat/sys-queue.h" |
31652869 | 90 | #include "xmalloc.h" |
8efc0c15 | 91 | #include "ssh.h" |
42f11eb2 | 92 | #include "ssh1.h" |
93 | #include "ssh2.h" | |
8efc0c15 | 94 | #include "packet.h" |
95 | #include "buffer.h" | |
7368a6c8 | 96 | #include "compat.h" |
a5efa1bb | 97 | #include "channels.h" |
7368a6c8 | 98 | #include "dispatch.h" |
fa08c86b | 99 | #include "key.h" |
31652869 | 100 | #include "cipher.h" |
e092ce67 | 101 | #include "kex.h" |
42f11eb2 | 102 | #include "log.h" |
103 | #include "readconf.h" | |
b5c334cc | 104 | #include "clientloop.h" |
ceec33f3 | 105 | #include "sshconnect.h" |
42f11eb2 | 106 | #include "authfd.h" |
107 | #include "atomicio.h" | |
07d80252 | 108 | #include "sshpty.h" |
e968270c | 109 | #include "misc.h" |
5e96b616 | 110 | #include "monitor_fdpass.h" |
111 | #include "match.h" | |
112 | #include "msg.h" | |
a22aff1f | 113 | |
114 | /* import options */ | |
115 | extern Options options; | |
116 | ||
8efc0c15 | 117 | /* Flag indicating that stdin should be redirected from /dev/null. */ |
118 | extern int stdin_null_flag; | |
119 | ||
66357af5 | 120 | /* Flag indicating that no shell has been requested */ |
121 | extern int no_shell_flag; | |
122 | ||
5e96b616 | 123 | /* Control socket */ |
3bcced4c | 124 | extern int muxserver_sock; |
5e96b616 | 125 | |
aa3378df | 126 | /* |
127 | * Name of the host we are connecting to. This is the name given on the | |
128 | * command line, or the HostName specified for the user-supplied name in a | |
129 | * configuration file. | |
130 | */ | |
8efc0c15 | 131 | extern char *host; |
132 | ||
aa3378df | 133 | /* |
134 | * Flag to indicate that we have received a window change signal which has | |
135 | * not yet been processed. This will cause a message indicating the new | |
136 | * window size to be sent to the server a little later. This is volatile | |
137 | * because this is updated in a signal handler. | |
138 | */ | |
7a934d1b | 139 | static volatile sig_atomic_t received_window_change_signal = 0; |
140 | static volatile sig_atomic_t received_signal = 0; | |
8efc0c15 | 141 | |
7b9b0103 | 142 | /* Flag indicating whether the user's terminal is in non-blocking mode. */ |
8efc0c15 | 143 | static int in_non_blocking_mode = 0; |
144 | ||
145 | /* Common data for the client loop code. */ | |
50394f26 | 146 | static volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */ |
f17f705b | 147 | static int escape_char1; /* Escape character. (proto1 only) */ |
148 | static int escape_pending1; /* Last character was an escape (proto1 only) */ | |
5260325f | 149 | static int last_was_cr; /* Last character was a newline. */ |
344f1d3d | 150 | static int exit_status; /* Used to store the command exit status. */ |
151 | static int stdin_eof; /* EOF has been encountered on stderr. */ | |
5260325f | 152 | static Buffer stdin_buffer; /* Buffer for stdin data. */ |
153 | static Buffer stdout_buffer; /* Buffer for stdout data. */ | |
154 | static Buffer stderr_buffer; /* Buffer for stderr data. */ | |
1e3b8b07 | 155 | static u_long stdin_bytes, stdout_bytes, stderr_bytes; |
156 | static u_int buffer_high;/* Soft max buffer size. */ | |
5260325f | 157 | static int connection_in; /* Connection to server (input). */ |
158 | static int connection_out; /* Connection to server (output). */ | |
c422989b | 159 | static int need_rekeying; /* Set to non-zero if rekeying is requested. */ |
eb0dd41f | 160 | static int session_closed = 0; /* In SSH2: login session closed. */ |
8efc0c15 | 161 | |
396c147e | 162 | static void client_init_dispatch(void); |
8ce64345 | 163 | int session_ident = -1; |
164 | ||
f17f705b | 165 | /* Track escape per proto2 channel */ |
166 | struct escape_filter_ctx { | |
167 | int escape_pending; | |
168 | int escape_char; | |
169 | }; | |
170 | ||
171 | /* Context for channel confirmation replies */ | |
95d3c124 | 172 | struct channel_reply_ctx { |
173 | const char *request_type; | |
174 | int id, do_close; | |
175 | }; | |
176 | ||
72becb62 | 177 | /* Global request success/failure callbacks */ |
178 | struct global_confirm { | |
179 | TAILQ_ENTRY(global_confirm) entry; | |
180 | global_confirm_cb *cb; | |
181 | void *ctx; | |
182 | int ref_count; | |
183 | }; | |
184 | TAILQ_HEAD(global_confirms, global_confirm); | |
185 | static struct global_confirms global_confirms = | |
186 | TAILQ_HEAD_INITIALIZER(global_confirms); | |
187 | ||
e092ce67 | 188 | /*XXX*/ |
189 | extern Kex *xxx_kex; | |
190 | ||
5e96b616 | 191 | void ssh_process_session2_setup(int, int, int, Buffer *); |
192 | ||
8efc0c15 | 193 | /* Restores stdin to blocking mode. */ |
194 | ||
396c147e | 195 | static void |
5ca51e19 | 196 | leave_non_blocking(void) |
8efc0c15 | 197 | { |
5260325f | 198 | if (in_non_blocking_mode) { |
1b273ece | 199 | unset_nonblock(fileno(stdin)); |
5260325f | 200 | in_non_blocking_mode = 0; |
5260325f | 201 | } |
8efc0c15 | 202 | } |
203 | ||
5260325f | 204 | /* Puts stdin terminal in non-blocking mode. */ |
205 | ||
396c147e | 206 | static void |
5ca51e19 | 207 | enter_non_blocking(void) |
8efc0c15 | 208 | { |
5260325f | 209 | in_non_blocking_mode = 1; |
170694d7 | 210 | set_nonblock(fileno(stdin)); |
8efc0c15 | 211 | } |
212 | ||
aa3378df | 213 | /* |
214 | * Signal handler for the window change signal (SIGWINCH). This just sets a | |
215 | * flag indicating that the window has changed. | |
216 | */ | |
3efa8ea9 | 217 | /*ARGSUSED */ |
396c147e | 218 | static void |
5260325f | 219 | window_change_handler(int sig) |
8efc0c15 | 220 | { |
5260325f | 221 | received_window_change_signal = 1; |
222 | signal(SIGWINCH, window_change_handler); | |
8efc0c15 | 223 | } |
224 | ||
aa3378df | 225 | /* |
226 | * Signal handler for signals that cause the program to terminate. These | |
227 | * signals must be trapped to restore terminal modes. | |
228 | */ | |
3efa8ea9 | 229 | /*ARGSUSED */ |
396c147e | 230 | static void |
5260325f | 231 | signal_handler(int sig) |
8efc0c15 | 232 | { |
c9130033 | 233 | received_signal = sig; |
234 | quit_pending = 1; | |
8efc0c15 | 235 | } |
236 | ||
aa3378df | 237 | /* |
238 | * Returns current time in seconds from Jan 1, 1970 with the maximum | |
239 | * available resolution. | |
240 | */ | |
8efc0c15 | 241 | |
396c147e | 242 | static double |
5ca51e19 | 243 | get_current_time(void) |
8efc0c15 | 244 | { |
5260325f | 245 | struct timeval tv; |
246 | gettimeofday(&tv, NULL); | |
247 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; | |
8efc0c15 | 248 | } |
249 | ||
9bf083eb | 250 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
251 | void | |
252 | client_x11_get_proto(const char *display, const char *xauth_path, | |
253 | u_int trusted, char **_proto, char **_data) | |
254 | { | |
255 | char cmd[1024]; | |
256 | char line[512]; | |
257 | char xdisplay[512]; | |
258 | static char proto[512], data[512]; | |
259 | FILE *f; | |
260 | int got_data = 0, generated = 0, do_unlink = 0, i; | |
261 | char *xauthdir, *xauthfile; | |
262 | struct stat st; | |
263 | ||
264 | xauthdir = xauthfile = NULL; | |
265 | *_proto = proto; | |
266 | *_data = data; | |
267 | proto[0] = data[0] = '\0'; | |
268 | ||
269 | if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { | |
270 | debug("No xauth program."); | |
271 | } else { | |
272 | if (display == NULL) { | |
273 | debug("x11_get_proto: DISPLAY not set"); | |
274 | return; | |
275 | } | |
276 | /* | |
277 | * Handle FamilyLocal case where $DISPLAY does | |
278 | * not match an authorization entry. For this we | |
279 | * just try "xauth list unix:displaynum.screennum". | |
280 | * XXX: "localhost" match to determine FamilyLocal | |
281 | * is not perfect. | |
282 | */ | |
283 | if (strncmp(display, "localhost:", 10) == 0) { | |
284 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", | |
285 | display + 10); | |
286 | display = xdisplay; | |
287 | } | |
288 | if (trusted == 0) { | |
289 | xauthdir = xmalloc(MAXPATHLEN); | |
290 | xauthfile = xmalloc(MAXPATHLEN); | |
291 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); | |
292 | if (mkdtemp(xauthdir) != NULL) { | |
293 | do_unlink = 1; | |
294 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", | |
295 | xauthdir); | |
296 | snprintf(cmd, sizeof(cmd), | |
297 | "%s -f %s generate %s " SSH_X11_PROTO | |
298 | " untrusted timeout 1200 2>" _PATH_DEVNULL, | |
299 | xauth_path, xauthfile, display); | |
300 | debug2("x11_get_proto: %s", cmd); | |
301 | if (system(cmd) == 0) | |
302 | generated = 1; | |
303 | } | |
304 | } | |
ed64eeca | 305 | |
306 | /* | |
307 | * When in untrusted mode, we read the cookie only if it was | |
308 | * successfully generated as an untrusted one in the step | |
309 | * above. | |
310 | */ | |
311 | if (trusted || generated) { | |
312 | snprintf(cmd, sizeof(cmd), | |
313 | "%s %s%s list %s 2>" _PATH_DEVNULL, | |
314 | xauth_path, | |
315 | generated ? "-f " : "" , | |
316 | generated ? xauthfile : "", | |
317 | display); | |
318 | debug2("x11_get_proto: %s", cmd); | |
319 | f = popen(cmd, "r"); | |
320 | if (f && fgets(line, sizeof(line), f) && | |
321 | sscanf(line, "%*s %511s %511s", proto, data) == 2) | |
322 | got_data = 1; | |
323 | if (f) | |
324 | pclose(f); | |
325 | } else | |
326 | error("Warning: untrusted X11 forwarding setup failed: " | |
327 | "xauth key data not generated"); | |
9bf083eb | 328 | } |
329 | ||
330 | if (do_unlink) { | |
331 | unlink(xauthfile); | |
332 | rmdir(xauthdir); | |
333 | } | |
334 | if (xauthdir) | |
335 | xfree(xauthdir); | |
336 | if (xauthfile) | |
337 | xfree(xauthfile); | |
338 | ||
339 | /* | |
340 | * If we didn't get authentication data, just make up some | |
341 | * data. The forwarding code will check the validity of the | |
342 | * response anyway, and substitute this data. The X11 | |
343 | * server, however, will ignore this fake data and use | |
344 | * whatever authentication mechanisms it was using otherwise | |
345 | * for the local connection. | |
346 | */ | |
347 | if (!got_data) { | |
348 | u_int32_t rnd = 0; | |
349 | ||
350 | logit("Warning: No xauth data; " | |
351 | "using fake authentication data for X11 forwarding."); | |
352 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); | |
353 | for (i = 0; i < 16; i++) { | |
354 | if (i % 4 == 0) | |
355 | rnd = arc4random(); | |
356 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", | |
357 | rnd & 0xff); | |
358 | rnd >>= 8; | |
359 | } | |
360 | } | |
361 | } | |
362 | ||
aa3378df | 363 | /* |
364 | * This is called when the interactive is entered. This checks if there is | |
365 | * an EOF coming on stdin. We must check this explicitly, as select() does | |
366 | * not appear to wake up when redirecting from /dev/null. | |
367 | */ | |
8efc0c15 | 368 | |
396c147e | 369 | static void |
5ca51e19 | 370 | client_check_initial_eof_on_stdin(void) |
8efc0c15 | 371 | { |
5260325f | 372 | int len; |
373 | char buf[1]; | |
374 | ||
aa3378df | 375 | /* |
376 | * If standard input is to be "redirected from /dev/null", we simply | |
377 | * mark that we have seen an EOF and send an EOF message to the | |
378 | * server. Otherwise, we try to read a single character; it appears | |
379 | * that for some files, such /dev/null, select() never wakes up for | |
380 | * read for this descriptor, which means that we never get EOF. This | |
381 | * way we will get the EOF if stdin comes from /dev/null or similar. | |
382 | */ | |
5260325f | 383 | if (stdin_null_flag) { |
384 | /* Fake EOF on stdin. */ | |
385 | debug("Sending eof."); | |
386 | stdin_eof = 1; | |
387 | packet_start(SSH_CMSG_EOF); | |
388 | packet_send(); | |
389 | } else { | |
5260325f | 390 | enter_non_blocking(); |
391 | ||
392 | /* Check for immediate EOF on stdin. */ | |
393 | len = read(fileno(stdin), buf, 1); | |
394 | if (len == 0) { | |
344f1d3d | 395 | /* |
396 | * EOF. Record that we have seen it and send | |
397 | * EOF to server. | |
398 | */ | |
5260325f | 399 | debug("Sending eof."); |
400 | stdin_eof = 1; | |
401 | packet_start(SSH_CMSG_EOF); | |
402 | packet_send(); | |
403 | } else if (len > 0) { | |
aa3378df | 404 | /* |
405 | * Got data. We must store the data in the buffer, | |
406 | * and also process it as an escape character if | |
407 | * appropriate. | |
408 | */ | |
f17f705b | 409 | if ((u_char) buf[0] == escape_char1) |
410 | escape_pending1 = 1; | |
7e8911cd | 411 | else |
5260325f | 412 | buffer_append(&stdin_buffer, buf, 1); |
5260325f | 413 | } |
5260325f | 414 | leave_non_blocking(); |
8efc0c15 | 415 | } |
8efc0c15 | 416 | } |
417 | ||
8efc0c15 | 418 | |
aa3378df | 419 | /* |
420 | * Make packets from buffered stdin data, and buffer them for sending to the | |
421 | * connection. | |
422 | */ | |
8efc0c15 | 423 | |
396c147e | 424 | static void |
5ca51e19 | 425 | client_make_packets_from_stdin_data(void) |
8efc0c15 | 426 | { |
1e3b8b07 | 427 | u_int len; |
5260325f | 428 | |
429 | /* Send buffered stdin data to the server. */ | |
430 | while (buffer_len(&stdin_buffer) > 0 && | |
184eed6a | 431 | packet_not_very_much_data_to_write()) { |
5260325f | 432 | len = buffer_len(&stdin_buffer); |
433 | /* Keep the packets at reasonable size. */ | |
434 | if (len > packet_get_maxsize()) | |
435 | len = packet_get_maxsize(); | |
436 | packet_start(SSH_CMSG_STDIN_DATA); | |
437 | packet_put_string(buffer_ptr(&stdin_buffer), len); | |
438 | packet_send(); | |
439 | buffer_consume(&stdin_buffer, len); | |
7e8911cd | 440 | stdin_bytes += len; |
5260325f | 441 | /* If we have a pending EOF, send it now. */ |
442 | if (stdin_eof && buffer_len(&stdin_buffer) == 0) { | |
443 | packet_start(SSH_CMSG_EOF); | |
444 | packet_send(); | |
445 | } | |
8efc0c15 | 446 | } |
8efc0c15 | 447 | } |
448 | ||
aa3378df | 449 | /* |
450 | * Checks if the client window has changed, and sends a packet about it to | |
451 | * the server if so. The actual change is detected elsewhere (by a software | |
452 | * interrupt on Unix); this just checks the flag and sends a message if | |
453 | * appropriate. | |
454 | */ | |
8efc0c15 | 455 | |
396c147e | 456 | static void |
5ca51e19 | 457 | client_check_window_change(void) |
8efc0c15 | 458 | { |
8ce64345 | 459 | struct winsize ws; |
460 | ||
461 | if (! received_window_change_signal) | |
462 | return; | |
463 | /** XXX race */ | |
464 | received_window_change_signal = 0; | |
465 | ||
de273eef | 466 | debug2("client_check_window_change: changed"); |
8ce64345 | 467 | |
468 | if (compat20) { | |
5e96b616 | 469 | channel_send_window_changes(); |
8ce64345 | 470 | } else { |
5e96b616 | 471 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
472 | return; | |
8ce64345 | 473 | packet_start(SSH_CMSG_WINDOW_SIZE); |
148de80c | 474 | packet_put_int((u_int)ws.ws_row); |
475 | packet_put_int((u_int)ws.ws_col); | |
476 | packet_put_int((u_int)ws.ws_xpixel); | |
477 | packet_put_int((u_int)ws.ws_ypixel); | |
8ce64345 | 478 | packet_send(); |
8efc0c15 | 479 | } |
8efc0c15 | 480 | } |
481 | ||
5d8d32a3 | 482 | static void |
483 | client_global_request_reply(int type, u_int32_t seq, void *ctxt) | |
484 | { | |
72becb62 | 485 | struct global_confirm *gc; |
486 | ||
487 | if ((gc = TAILQ_FIRST(&global_confirms)) == NULL) | |
488 | return; | |
489 | if (gc->cb != NULL) | |
490 | gc->cb(type, seq, gc->ctx); | |
491 | if (--gc->ref_count <= 0) { | |
492 | TAILQ_REMOVE(&global_confirms, gc, entry); | |
493 | bzero(gc, sizeof(*gc)); | |
494 | xfree(gc); | |
495 | } | |
496 | ||
ac47b626 | 497 | keep_alive_timeouts = 0; |
5d8d32a3 | 498 | } |
499 | ||
500 | static void | |
501 | server_alive_check(void) | |
502 | { | |
ac47b626 | 503 | if (++keep_alive_timeouts > options.server_alive_count_max) { |
bd3b2cb2 | 504 | logit("Timeout, server not responding."); |
505 | cleanup_exit(255); | |
506 | } | |
5d8d32a3 | 507 | packet_start(SSH2_MSG_GLOBAL_REQUEST); |
508 | packet_put_cstring("keepalive@openssh.com"); | |
509 | packet_put_char(1); /* boolean: want reply */ | |
510 | packet_send(); | |
72becb62 | 511 | /* Insert an empty placeholder to maintain ordering */ |
512 | client_register_global_confirm(NULL, NULL); | |
5d8d32a3 | 513 | } |
514 | ||
aa3378df | 515 | /* |
516 | * Waits until the client can do something (some data becomes available on | |
517 | * one of the file descriptors). | |
518 | */ | |
396c147e | 519 | static void |
39929cdb | 520 | client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
9a995072 | 521 | int *maxfdp, u_int *nallocp, int rekeying) |
8efc0c15 | 522 | { |
5d8d32a3 | 523 | struct timeval tv, *tvp; |
524 | int ret; | |
525 | ||
39929cdb | 526 | /* Add any selections by the channel mechanism. */ |
489aa2e9 | 527 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); |
5260325f | 528 | |
8ce64345 | 529 | if (!compat20) { |
530 | /* Read from the connection, unless our buffers are full. */ | |
531 | if (buffer_len(&stdout_buffer) < buffer_high && | |
532 | buffer_len(&stderr_buffer) < buffer_high && | |
533 | channel_not_very_much_buffered_data()) | |
39929cdb | 534 | FD_SET(connection_in, *readsetp); |
8ce64345 | 535 | /* |
536 | * Read from stdin, unless we have seen EOF or have very much | |
537 | * buffered data to send to the server. | |
538 | */ | |
539 | if (!stdin_eof && packet_not_very_much_data_to_write()) | |
39929cdb | 540 | FD_SET(fileno(stdin), *readsetp); |
8ce64345 | 541 | |
542 | /* Select stdout/stderr if have data in buffer. */ | |
543 | if (buffer_len(&stdout_buffer) > 0) | |
39929cdb | 544 | FD_SET(fileno(stdout), *writesetp); |
8ce64345 | 545 | if (buffer_len(&stderr_buffer) > 0) |
39929cdb | 546 | FD_SET(fileno(stderr), *writesetp); |
8ce64345 | 547 | } else { |
24b6b45f | 548 | /* channel_prepare_select could have closed the last channel */ |
fd6cfbaf | 549 | if (session_closed && !channel_still_open() && |
550 | !packet_have_data_to_write()) { | |
551 | /* clear mask since we did not call select() */ | |
b3ad8fe6 | 552 | memset(*readsetp, 0, *nallocp); |
553 | memset(*writesetp, 0, *nallocp); | |
fd6cfbaf | 554 | return; |
24b6b45f | 555 | } else { |
556 | FD_SET(connection_in, *readsetp); | |
557 | } | |
8ce64345 | 558 | } |
5260325f | 559 | |
5260325f | 560 | /* Select server connection if have data to write to the server. */ |
561 | if (packet_have_data_to_write()) | |
39929cdb | 562 | FD_SET(connection_out, *writesetp); |
5260325f | 563 | |
3bcced4c | 564 | if (muxserver_sock != -1) |
565 | FD_SET(muxserver_sock, *readsetp); | |
5e96b616 | 566 | |
aa3378df | 567 | /* |
568 | * Wait for something to happen. This will suspend the process until | |
569 | * some selected descriptor can be read, written, or has some other | |
5d8d32a3 | 570 | * event pending. |
aa3378df | 571 | */ |
5260325f | 572 | |
5d8d32a3 | 573 | if (options.server_alive_interval == 0 || !compat20) |
574 | tvp = NULL; | |
f2107e97 | 575 | else { |
5d8d32a3 | 576 | tv.tv_sec = options.server_alive_interval; |
577 | tv.tv_usec = 0; | |
578 | tvp = &tv; | |
579 | } | |
580 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); | |
581 | if (ret < 0) { | |
5260325f | 582 | char buf[100]; |
fd193ca4 | 583 | |
584 | /* | |
585 | * We have to clear the select masks, because we return. | |
586 | * We have to return, because the mainloop checks for the flags | |
587 | * set by the signal handlers. | |
588 | */ | |
b3ad8fe6 | 589 | memset(*readsetp, 0, *nallocp); |
590 | memset(*writesetp, 0, *nallocp); | |
fd193ca4 | 591 | |
5260325f | 592 | if (errno == EINTR) |
593 | return; | |
594 | /* Note: we might still have data in the buffers. */ | |
595 | snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); | |
596 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 597 | quit_pending = 1; |
5d8d32a3 | 598 | } else if (ret == 0) |
599 | server_alive_check(); | |
8efc0c15 | 600 | } |
601 | ||
396c147e | 602 | static void |
2e73a022 | 603 | client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
8efc0c15 | 604 | { |
5260325f | 605 | /* Flush stdout and stderr buffers. */ |
2e73a022 | 606 | if (buffer_len(bout) > 0) |
344f1d3d | 607 | atomicio(vwrite, fileno(stdout), buffer_ptr(bout), |
608 | buffer_len(bout)); | |
2e73a022 | 609 | if (buffer_len(berr) > 0) |
344f1d3d | 610 | atomicio(vwrite, fileno(stderr), buffer_ptr(berr), |
611 | buffer_len(berr)); | |
5260325f | 612 | |
5260325f | 613 | leave_raw_mode(); |
614 | ||
aa3378df | 615 | /* |
616 | * Free (and clear) the buffer to reduce the amount of data that gets | |
617 | * written to swap. | |
618 | */ | |
2e73a022 | 619 | buffer_free(bin); |
620 | buffer_free(bout); | |
621 | buffer_free(berr); | |
5260325f | 622 | |
5260325f | 623 | /* Send the suspend signal to the program itself. */ |
624 | kill(getpid(), SIGTSTP); | |
625 | ||
2c9a4d41 | 626 | /* Reset window sizes in case they have changed */ |
627 | received_window_change_signal = 1; | |
5260325f | 628 | |
629 | /* OK, we have been continued by the user. Reinitialize buffers. */ | |
2e73a022 | 630 | buffer_init(bin); |
631 | buffer_init(bout); | |
632 | buffer_init(berr); | |
5260325f | 633 | |
5260325f | 634 | enter_raw_mode(); |
8efc0c15 | 635 | } |
636 | ||
396c147e | 637 | static void |
b476adfa | 638 | client_process_net_input(fd_set *readset) |
8efc0c15 | 639 | { |
8ce64345 | 640 | int len; |
641 | char buf[8192]; | |
5260325f | 642 | |
aa3378df | 643 | /* |
644 | * Read input from the server, and add any such data to the buffer of | |
645 | * the packet subsystem. | |
646 | */ | |
5260325f | 647 | if (FD_ISSET(connection_in, readset)) { |
648 | /* Read as much as possible. */ | |
649 | len = read(connection_in, buf, sizeof(buf)); | |
650 | if (len == 0) { | |
344f1d3d | 651 | /* |
652 | * Received EOF. The remote host has closed the | |
653 | * connection. | |
654 | */ | |
655 | snprintf(buf, sizeof buf, | |
656 | "Connection to %.300s closed by remote host.\r\n", | |
657 | host); | |
8efc0c15 | 658 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
8efc0c15 | 659 | quit_pending = 1; |
660 | return; | |
5260325f | 661 | } |
aa3378df | 662 | /* |
663 | * There is a kernel bug on Solaris that causes select to | |
664 | * sometimes wake up even though there is no data available. | |
665 | */ | |
5a0c8771 | 666 | if (len < 0 && |
667 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) | |
5260325f | 668 | len = 0; |
669 | ||
670 | if (len < 0) { | |
344f1d3d | 671 | /* |
672 | * An error has encountered. Perhaps there is a | |
673 | * network problem. | |
674 | */ | |
675 | snprintf(buf, sizeof buf, | |
676 | "Read from remote host %.300s: %.100s\r\n", | |
677 | host, strerror(errno)); | |
5260325f | 678 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
5260325f | 679 | quit_pending = 1; |
680 | return; | |
681 | } | |
682 | packet_process_incoming(buf, len); | |
683 | } | |
8ce64345 | 684 | } |
685 | ||
5e96b616 | 686 | static void |
95d3c124 | 687 | client_status_confirm(int type, Channel *c, void *ctx) |
5e96b616 | 688 | { |
95d3c124 | 689 | struct channel_reply_ctx *cr = (struct channel_reply_ctx *)ctx; |
690 | char errmsg[256]; | |
691 | int tochan; | |
692 | ||
693 | /* XXX supress on mux _client_ quietmode */ | |
694 | tochan = options.log_level >= SYSLOG_LEVEL_ERROR && | |
695 | c->ctl_fd != -1 && c->extended_usage == CHAN_EXTENDED_WRITE; | |
696 | ||
697 | if (type == SSH2_MSG_CHANNEL_SUCCESS) { | |
698 | debug2("%s request accepted on channel %d", | |
699 | cr->request_type, c->self); | |
700 | } else if (type == SSH2_MSG_CHANNEL_FAILURE) { | |
701 | if (tochan) { | |
702 | snprintf(errmsg, sizeof(errmsg), | |
703 | "%s request failed\r\n", cr->request_type); | |
704 | } else { | |
705 | snprintf(errmsg, sizeof(errmsg), | |
706 | "%s request failed on channel %d", | |
707 | cr->request_type, c->self); | |
708 | } | |
709 | /* If error occurred on primary session channel, then exit */ | |
710 | if (cr->do_close && c->self == session_ident) | |
711 | fatal("%s", errmsg); | |
712 | /* If error occurred on mux client, append to their stderr */ | |
713 | if (tochan) | |
714 | buffer_append(&c->extended, errmsg, strlen(errmsg)); | |
715 | else | |
716 | error("%s", errmsg); | |
717 | if (cr->do_close) { | |
718 | chan_read_failed(c); | |
719 | chan_write_failed(c); | |
720 | } | |
721 | } | |
722 | xfree(cr); | |
723 | } | |
f2107e97 | 724 | |
95d3c124 | 725 | static void |
726 | client_abandon_status_confirm(Channel *c, void *ctx) | |
727 | { | |
728 | xfree(ctx); | |
729 | } | |
5e96b616 | 730 | |
95d3c124 | 731 | static void |
732 | client_expect_confirm(int id, const char *request, int do_close) | |
733 | { | |
734 | struct channel_reply_ctx *cr = xmalloc(sizeof(*cr)); | |
5e96b616 | 735 | |
95d3c124 | 736 | cr->request_type = request; |
737 | cr->do_close = do_close; | |
738 | ||
739 | channel_register_status_confirm(id, client_status_confirm, | |
740 | client_abandon_status_confirm, cr); | |
5e96b616 | 741 | } |
742 | ||
72becb62 | 743 | void |
744 | client_register_global_confirm(global_confirm_cb *cb, void *ctx) | |
745 | { | |
746 | struct global_confirm *gc, *first_gc; | |
747 | ||
748 | /* Coalesce identical callbacks */ | |
07d8d480 | 749 | first_gc = TAILQ_LAST(&global_confirms, global_confirms); |
72becb62 | 750 | if (first_gc && first_gc->cb == cb && first_gc->ctx == ctx) { |
751 | if (++first_gc->ref_count >= INT_MAX) | |
752 | fatal("%s: first_gc->ref_count = %d", | |
753 | __func__, first_gc->ref_count); | |
754 | return; | |
755 | } | |
756 | ||
757 | gc = xmalloc(sizeof(*gc)); | |
758 | gc->cb = cb; | |
759 | gc->ctx = ctx; | |
760 | gc->ref_count = 1; | |
761 | TAILQ_INSERT_TAIL(&global_confirms, gc, entry); | |
762 | } | |
763 | ||
c53c54c2 | 764 | static void |
ec9b7086 | 765 | process_cmdline(void) |
c53c54c2 | 766 | { |
c53c54c2 | 767 | void (*handler)(int); |
3867aa0a | 768 | char *s, *cmd, *cancel_host; |
d740ec16 | 769 | int delete = 0; |
c53c54c2 | 770 | int local = 0; |
3867aa0a | 771 | u_short cancel_port; |
772 | Forward fwd; | |
c53c54c2 | 773 | |
16912319 | 774 | bzero(&fwd, sizeof(fwd)); |
775 | fwd.listen_host = fwd.connect_host = NULL; | |
776 | ||
c53c54c2 | 777 | leave_raw_mode(); |
875ec275 | 778 | handler = signal(SIGINT, SIG_IGN); |
ec9b7086 | 779 | cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); |
c53c54c2 | 780 | if (s == NULL) |
781 | goto out; | |
f48fbab3 | 782 | while (isspace(*s)) |
c53c54c2 | 783 | s++; |
d740ec16 | 784 | if (*s == '-') |
785 | s++; /* Skip cmdline '-', if any */ | |
27c6fcae | 786 | if (*s == '\0') |
c53c54c2 | 787 | goto out; |
d740ec16 | 788 | |
7069a5e2 | 789 | if (*s == 'h' || *s == 'H' || *s == '?') { |
d740ec16 | 790 | logit("Commands:"); |
9f1090be | 791 | logit(" -L[bind_address:]port:host:hostport " |
792 | "Request local forward"); | |
793 | logit(" -R[bind_address:]port:host:hostport " | |
794 | "Request remote forward"); | |
33f13fa5 | 795 | logit(" -KR[bind_address:]port " |
9f1090be | 796 | "Cancel remote forward"); |
d20f3c9e | 797 | if (!options.permit_local_command) |
798 | goto out; | |
9f1090be | 799 | logit(" !args " |
800 | "Execute local command"); | |
d20f3c9e | 801 | goto out; |
802 | } | |
803 | ||
804 | if (*s == '!' && options.permit_local_command) { | |
805 | s++; | |
806 | ssh_local_cmd(s); | |
d740ec16 | 807 | goto out; |
808 | } | |
809 | ||
810 | if (*s == 'K') { | |
811 | delete = 1; | |
812 | s++; | |
813 | } | |
814 | if (*s != 'L' && *s != 'R') { | |
bbe88b6d | 815 | logit("Invalid command."); |
c53c54c2 | 816 | goto out; |
817 | } | |
d740ec16 | 818 | if (*s == 'L') |
c53c54c2 | 819 | local = 1; |
d740ec16 | 820 | if (local && delete) { |
821 | logit("Not supported."); | |
822 | goto out; | |
823 | } | |
824 | if ((!local || delete) && !compat20) { | |
bbe88b6d | 825 | logit("Not supported for SSH protocol version 1."); |
c53c54c2 | 826 | goto out; |
827 | } | |
d740ec16 | 828 | |
f48fbab3 | 829 | while (isspace(*++s)) |
830 | ; | |
c53c54c2 | 831 | |
d740ec16 | 832 | if (delete) { |
3867aa0a | 833 | cancel_port = 0; |
834 | cancel_host = hpdelim(&s); /* may be NULL */ | |
835 | if (s != NULL) { | |
836 | cancel_port = a2port(s); | |
837 | cancel_host = cleanhostname(cancel_host); | |
838 | } else { | |
839 | cancel_port = a2port(cancel_host); | |
840 | cancel_host = NULL; | |
d740ec16 | 841 | } |
3867aa0a | 842 | if (cancel_port == 0) { |
843 | logit("Bad forwarding close port"); | |
c53c54c2 | 844 | goto out; |
845 | } | |
3867aa0a | 846 | channel_request_rforward_cancel(cancel_host, cancel_port); |
d740ec16 | 847 | } else { |
3867aa0a | 848 | if (!parse_forward(&fwd, s)) { |
d740ec16 | 849 | logit("Bad forwarding specification."); |
850 | goto out; | |
851 | } | |
d740ec16 | 852 | if (local) { |
3867aa0a | 853 | if (channel_setup_local_fwd_listener(fwd.listen_host, |
854 | fwd.listen_port, fwd.connect_host, | |
855 | fwd.connect_port, options.gateway_ports) < 0) { | |
d740ec16 | 856 | logit("Port forwarding failed."); |
857 | goto out; | |
858 | } | |
3867aa0a | 859 | } else { |
42ea6f5e | 860 | if (channel_request_remote_forwarding(fwd.listen_host, |
3867aa0a | 861 | fwd.listen_port, fwd.connect_host, |
42ea6f5e | 862 | fwd.connect_port) < 0) { |
863 | logit("Port forwarding failed."); | |
864 | goto out; | |
865 | } | |
3867aa0a | 866 | } |
867 | ||
d740ec16 | 868 | logit("Forwarding port."); |
869 | } | |
870 | ||
c53c54c2 | 871 | out: |
872 | signal(SIGINT, handler); | |
873 | enter_raw_mode(); | |
874 | if (cmd) | |
875 | xfree(cmd); | |
16912319 | 876 | if (fwd.listen_host != NULL) |
877 | xfree(fwd.listen_host); | |
878 | if (fwd.connect_host != NULL) | |
879 | xfree(fwd.connect_host); | |
c53c54c2 | 880 | } |
881 | ||
f17f705b | 882 | /* |
883 | * Process the characters one by one, call with c==NULL for proto1 case. | |
884 | */ | |
396c147e | 885 | static int |
f17f705b | 886 | process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, |
887 | char *buf, int len) | |
2e73a022 | 888 | { |
889 | char string[1024]; | |
890 | pid_t pid; | |
891 | int bytes = 0; | |
1e3b8b07 | 892 | u_int i; |
893 | u_char ch; | |
2e73a022 | 894 | char *s; |
f17f705b | 895 | int *escape_pendingp, escape_char; |
896 | struct escape_filter_ctx *efc; | |
2e73a022 | 897 | |
f17f705b | 898 | if (c == NULL) { |
899 | escape_pendingp = &escape_pending1; | |
900 | escape_char = escape_char1; | |
901 | } else { | |
902 | if (c->filter_ctx == NULL) | |
903 | return 0; | |
904 | efc = (struct escape_filter_ctx *)c->filter_ctx; | |
905 | escape_pendingp = &efc->escape_pending; | |
906 | escape_char = efc->escape_char; | |
907 | } | |
908 | ||
2ceb8101 | 909 | if (len <= 0) |
910 | return (0); | |
911 | ||
912 | for (i = 0; i < (u_int)len; i++) { | |
2e73a022 | 913 | /* Get one character at a time. */ |
914 | ch = buf[i]; | |
915 | ||
f17f705b | 916 | if (*escape_pendingp) { |
2e73a022 | 917 | /* We have previously seen an escape character. */ |
918 | /* Clear the flag now. */ | |
f17f705b | 919 | *escape_pendingp = 0; |
2e73a022 | 920 | |
921 | /* Process the escaped character. */ | |
922 | switch (ch) { | |
923 | case '.': | |
924 | /* Terminate the connection. */ | |
f17f705b | 925 | snprintf(string, sizeof string, "%c.\r\n", |
926 | escape_char); | |
2e73a022 | 927 | buffer_append(berr, string, strlen(string)); |
2e73a022 | 928 | |
f17f705b | 929 | if (c && c->ctl_fd != -1) { |
930 | chan_read_failed(c); | |
931 | chan_write_failed(c); | |
932 | return 0; | |
933 | } else | |
934 | quit_pending = 1; | |
2e73a022 | 935 | return -1; |
936 | ||
937 | case 'Z' - 64: | |
f17f705b | 938 | /* XXX support this for mux clients */ |
939 | if (c && c->ctl_fd != -1) { | |
940 | noescape: | |
941 | snprintf(string, sizeof string, | |
942 | "%c%c escape not available to " | |
943 | "multiplexed sessions\r\n", | |
944 | escape_char, ch); | |
945 | buffer_append(berr, string, | |
946 | strlen(string)); | |
947 | continue; | |
948 | } | |
344f1d3d | 949 | /* Suspend the program. Inform the user */ |
f17f705b | 950 | snprintf(string, sizeof string, |
951 | "%c^Z [suspend ssh]\r\n", escape_char); | |
2e73a022 | 952 | buffer_append(berr, string, strlen(string)); |
2e73a022 | 953 | |
954 | /* Restore terminal modes and suspend. */ | |
955 | client_suspend_self(bin, bout, berr); | |
956 | ||
957 | /* We have been continued. */ | |
958 | continue; | |
959 | ||
16a79097 | 960 | case 'B': |
961 | if (compat20) { | |
962 | snprintf(string, sizeof string, | |
963 | "%cB\r\n", escape_char); | |
964 | buffer_append(berr, string, | |
965 | strlen(string)); | |
966 | channel_request_start(session_ident, | |
967 | "break", 0); | |
968 | packet_put_int(1000); | |
969 | packet_send(); | |
970 | } | |
971 | continue; | |
972 | ||
e092ce67 | 973 | case 'R': |
54506d2e | 974 | if (compat20) { |
975 | if (datafellows & SSH_BUG_NOREKEY) | |
344f1d3d | 976 | logit("Server does not " |
977 | "support re-keying"); | |
54506d2e | 978 | else |
979 | need_rekeying = 1; | |
980 | } | |
e092ce67 | 981 | continue; |
982 | ||
2e73a022 | 983 | case '&': |
f17f705b | 984 | if (c && c->ctl_fd != -1) |
985 | goto noescape; | |
2e73a022 | 986 | /* |
344f1d3d | 987 | * Detach the program (continue to serve |
988 | * connections, but put in background and no | |
989 | * more new connections). | |
2e73a022 | 990 | */ |
2e73a022 | 991 | /* Restore tty modes. */ |
992 | leave_raw_mode(); | |
993 | ||
994 | /* Stop listening for new connections. */ | |
c6940381 | 995 | channel_stop_listening(); |
2e73a022 | 996 | |
c6940381 | 997 | snprintf(string, sizeof string, |
998 | "%c& [backgrounded]\n", escape_char); | |
999 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1000 | |
1001 | /* Fork into background. */ | |
1002 | pid = fork(); | |
1003 | if (pid < 0) { | |
1004 | error("fork: %.100s", strerror(errno)); | |
1005 | continue; | |
1006 | } | |
1007 | if (pid != 0) { /* This is the parent. */ | |
1008 | /* The parent just exits. */ | |
1009 | exit(0); | |
1010 | } | |
1011 | /* The child continues serving connections. */ | |
c6940381 | 1012 | if (compat20) { |
1013 | buffer_append(bin, "\004", 1); | |
1014 | /* fake EOF on stdin */ | |
1015 | return -1; | |
1016 | } else if (!stdin_eof) { | |
1017 | /* | |
344f1d3d | 1018 | * Sending SSH_CMSG_EOF alone does not |
1019 | * always appear to be enough. So we | |
1020 | * try to send an EOF character first. | |
c6940381 | 1021 | */ |
1022 | packet_start(SSH_CMSG_STDIN_DATA); | |
1023 | packet_put_string("\004", 1); | |
1024 | packet_send(); | |
1025 | /* Close stdin. */ | |
1026 | stdin_eof = 1; | |
1027 | if (buffer_len(bin) == 0) { | |
1028 | packet_start(SSH_CMSG_EOF); | |
1029 | packet_send(); | |
1030 | } | |
1031 | } | |
1032 | continue; | |
2e73a022 | 1033 | |
1034 | case '?': | |
f17f705b | 1035 | if (c && c->ctl_fd != -1) { |
1036 | snprintf(string, sizeof string, | |
1037 | "%c?\r\n\ | |
1038 | Supported escape sequences:\r\n\ | |
1039 | %c. - terminate session\r\n\ | |
1040 | %cB - send a BREAK to the remote system\r\n\ | |
1041 | %cC - open a command line\r\n\ | |
1042 | %cR - Request rekey (SSH protocol 2 only)\r\n\ | |
1043 | %c# - list forwarded connections\r\n\ | |
1044 | %c? - this message\r\n\ | |
1045 | %c%c - send the escape character by typing it twice\r\n\ | |
1046 | (Note that escapes are only recognized immediately after newline.)\r\n", | |
1047 | escape_char, escape_char, | |
1048 | escape_char, escape_char, | |
1049 | escape_char, escape_char, | |
1050 | escape_char, escape_char, | |
1051 | escape_char); | |
1052 | } else { | |
1053 | snprintf(string, sizeof string, | |
2e73a022 | 1054 | "%c?\r\n\ |
1055 | Supported escape sequences:\r\n\ | |
f17f705b | 1056 | %c. - terminate connection (and any multiplexed sessions)\r\n\ |
1057 | %cB - send a BREAK to the remote system\r\n\ | |
1058 | %cC - open a command line\r\n\ | |
1059 | %cR - Request rekey (SSH protocol 2 only)\r\n\ | |
1060 | %c^Z - suspend ssh\r\n\ | |
1061 | %c# - list forwarded connections\r\n\ | |
1062 | %c& - background ssh (when waiting for connections to terminate)\r\n\ | |
1063 | %c? - this message\r\n\ | |
1064 | %c%c - send the escape character by typing it twice\r\n\ | |
2e73a022 | 1065 | (Note that escapes are only recognized immediately after newline.)\r\n", |
f17f705b | 1066 | escape_char, escape_char, |
1067 | escape_char, escape_char, | |
1068 | escape_char, escape_char, | |
1069 | escape_char, escape_char, | |
1070 | escape_char, escape_char, | |
1071 | escape_char); | |
1072 | } | |
2e73a022 | 1073 | buffer_append(berr, string, strlen(string)); |
1074 | continue; | |
1075 | ||
1076 | case '#': | |
f17f705b | 1077 | snprintf(string, sizeof string, "%c#\r\n", |
1078 | escape_char); | |
2e73a022 | 1079 | buffer_append(berr, string, strlen(string)); |
1080 | s = channel_open_message(); | |
1081 | buffer_append(berr, s, strlen(s)); | |
1082 | xfree(s); | |
1083 | continue; | |
1084 | ||
c53c54c2 | 1085 | case 'C': |
ec9b7086 | 1086 | process_cmdline(); |
c53c54c2 | 1087 | continue; |
1088 | ||
2e73a022 | 1089 | default: |
1090 | if (ch != escape_char) { | |
1091 | buffer_put_char(bin, escape_char); | |
1092 | bytes++; | |
1093 | } | |
1094 | /* Escaped characters fall through here */ | |
1095 | break; | |
1096 | } | |
1097 | } else { | |
1098 | /* | |
344f1d3d | 1099 | * The previous character was not an escape char. |
1100 | * Check if this is an escape. | |
2e73a022 | 1101 | */ |
1102 | if (last_was_cr && ch == escape_char) { | |
344f1d3d | 1103 | /* |
1104 | * It is. Set the flag and continue to | |
1105 | * next character. | |
1106 | */ | |
f17f705b | 1107 | *escape_pendingp = 1; |
2e73a022 | 1108 | continue; |
1109 | } | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * Normal character. Record whether it was a newline, | |
1114 | * and append it to the buffer. | |
1115 | */ | |
1116 | last_was_cr = (ch == '\r' || ch == '\n'); | |
1117 | buffer_put_char(bin, ch); | |
1118 | bytes++; | |
1119 | } | |
1120 | return bytes; | |
1121 | } | |
1122 | ||
396c147e | 1123 | static void |
b476adfa | 1124 | client_process_input(fd_set *readset) |
8ce64345 | 1125 | { |
9da5c3c9 | 1126 | int len; |
2e73a022 | 1127 | char buf[8192]; |
8ce64345 | 1128 | |
5260325f | 1129 | /* Read input from stdin. */ |
1130 | if (FD_ISSET(fileno(stdin), readset)) { | |
1131 | /* Read as much as possible. */ | |
1132 | len = read(fileno(stdin), buf, sizeof(buf)); | |
5a0c8771 | 1133 | if (len < 0 && |
1134 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) | |
cf6bc93c | 1135 | return; /* we'll try again later */ |
5260325f | 1136 | if (len <= 0) { |
aa3378df | 1137 | /* |
1138 | * Received EOF or error. They are treated | |
1139 | * similarly, except that an error message is printed | |
1140 | * if it was an error condition. | |
1141 | */ | |
5260325f | 1142 | if (len < 0) { |
344f1d3d | 1143 | snprintf(buf, sizeof buf, "read: %.100s\r\n", |
1144 | strerror(errno)); | |
5260325f | 1145 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
5260325f | 1146 | } |
1147 | /* Mark that we have seen EOF. */ | |
1148 | stdin_eof = 1; | |
aa3378df | 1149 | /* |
1150 | * Send an EOF message to the server unless there is | |
1151 | * data in the buffer. If there is data in the | |
1152 | * buffer, no message will be sent now. Code | |
1153 | * elsewhere will send the EOF when the buffer | |
1154 | * becomes empty if stdin_eof is set. | |
1155 | */ | |
5260325f | 1156 | if (buffer_len(&stdin_buffer) == 0) { |
8efc0c15 | 1157 | packet_start(SSH_CMSG_EOF); |
1158 | packet_send(); | |
5260325f | 1159 | } |
f17f705b | 1160 | } else if (escape_char1 == SSH_ESCAPECHAR_NONE) { |
aa3378df | 1161 | /* |
1162 | * Normal successful read, and no escape character. | |
1163 | * Just append the data to buffer. | |
1164 | */ | |
5260325f | 1165 | buffer_append(&stdin_buffer, buf, len); |
5260325f | 1166 | } else { |
aa3378df | 1167 | /* |
344f1d3d | 1168 | * Normal, successful read. But we have an escape |
1169 | * character and have to process the characters one | |
1170 | * by one. | |
aa3378df | 1171 | */ |
f17f705b | 1172 | if (process_escapes(NULL, &stdin_buffer, |
1173 | &stdout_buffer, &stderr_buffer, buf, len) == -1) | |
2e73a022 | 1174 | return; |
5260325f | 1175 | } |
1176 | } | |
8efc0c15 | 1177 | } |
1178 | ||
396c147e | 1179 | static void |
b476adfa | 1180 | client_process_output(fd_set *writeset) |
8efc0c15 | 1181 | { |
5260325f | 1182 | int len; |
1183 | char buf[100]; | |
1184 | ||
1185 | /* Write buffered output to stdout. */ | |
1186 | if (FD_ISSET(fileno(stdout), writeset)) { | |
1187 | /* Write as much data as possible. */ | |
1188 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1189 | buffer_len(&stdout_buffer)); |
5260325f | 1190 | if (len <= 0) { |
5a0c8771 | 1191 | if (errno == EINTR || errno == EAGAIN || |
1192 | errno == EWOULDBLOCK) | |
5260325f | 1193 | len = 0; |
1194 | else { | |
aa3378df | 1195 | /* |
1196 | * An error or EOF was encountered. Put an | |
1197 | * error message to stderr buffer. | |
1198 | */ | |
344f1d3d | 1199 | snprintf(buf, sizeof buf, |
1200 | "write stdout: %.50s\r\n", strerror(errno)); | |
5260325f | 1201 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
5260325f | 1202 | quit_pending = 1; |
1203 | return; | |
1204 | } | |
1205 | } | |
1206 | /* Consume printed data from the buffer. */ | |
1207 | buffer_consume(&stdout_buffer, len); | |
cd332296 | 1208 | stdout_bytes += len; |
5260325f | 1209 | } |
1210 | /* Write buffered output to stderr. */ | |
1211 | if (FD_ISSET(fileno(stderr), writeset)) { | |
1212 | /* Write as much data as possible. */ | |
1213 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1214 | buffer_len(&stderr_buffer)); |
5260325f | 1215 | if (len <= 0) { |
5a0c8771 | 1216 | if (errno == EINTR || errno == EAGAIN || |
1217 | errno == EWOULDBLOCK) | |
5260325f | 1218 | len = 0; |
1219 | else { | |
344f1d3d | 1220 | /* |
1221 | * EOF or error, but can't even print | |
1222 | * error message. | |
1223 | */ | |
5260325f | 1224 | quit_pending = 1; |
1225 | return; | |
1226 | } | |
1227 | } | |
1228 | /* Consume printed characters from the buffer. */ | |
1229 | buffer_consume(&stderr_buffer, len); | |
cd332296 | 1230 | stderr_bytes += len; |
8efc0c15 | 1231 | } |
8efc0c15 | 1232 | } |
1233 | ||
7368a6c8 | 1234 | /* |
1235 | * Get packets from the connection input buffer, and process them as long as | |
1236 | * there are packets available. | |
1237 | * | |
1238 | * Any unknown packets received during the actual | |
1239 | * session cause the session to terminate. This is | |
1240 | * intended to make debugging easier since no | |
1241 | * confirmations are sent. Any compatible protocol | |
1242 | * extensions must be negotiated during the | |
1243 | * preparatory phase. | |
1244 | */ | |
1245 | ||
396c147e | 1246 | static void |
5ca51e19 | 1247 | client_process_buffered_input_packets(void) |
7368a6c8 | 1248 | { |
344f1d3d | 1249 | dispatch_run(DISPATCH_NONBLOCK, &quit_pending, |
1250 | compat20 ? xxx_kex : NULL); | |
7368a6c8 | 1251 | } |
1252 | ||
2e73a022 | 1253 | /* scan buf[] for '~' before sending data to the peer */ |
1254 | ||
f17f705b | 1255 | /* Helper: allocate a new escape_filter_ctx and fill in its escape char */ |
1256 | void * | |
1257 | client_new_escape_filter_ctx(int escape_char) | |
1258 | { | |
1259 | struct escape_filter_ctx *ret; | |
1260 | ||
1261 | ret = xmalloc(sizeof(*ret)); | |
1262 | ret->escape_pending = 0; | |
1263 | ret->escape_char = escape_char; | |
1264 | return (void *)ret; | |
1265 | } | |
1266 | ||
e74caf1e | 1267 | /* Free the escape filter context on channel free */ |
1268 | void | |
1269 | client_filter_cleanup(int cid, void *ctx) | |
1270 | { | |
1271 | xfree(ctx); | |
1272 | } | |
1273 | ||
f17f705b | 1274 | int |
1275 | client_simple_escape_filter(Channel *c, char *buf, int len) | |
2e73a022 | 1276 | { |
95d3c124 | 1277 | if (c->extended_usage != CHAN_EXTENDED_WRITE) |
1278 | return 0; | |
1279 | ||
f17f705b | 1280 | return process_escapes(c, &c->input, &c->output, &c->extended, |
1281 | buf, len); | |
2e73a022 | 1282 | } |
1283 | ||
396c147e | 1284 | static void |
eb0dd41f | 1285 | client_channel_closed(int id, void *arg) |
1286 | { | |
418e724c | 1287 | channel_cancel_cleanup(id); |
eb0dd41f | 1288 | session_closed = 1; |
82de775c | 1289 | leave_raw_mode(); |
eb0dd41f | 1290 | } |
1291 | ||
aa3378df | 1292 | /* |
1293 | * Implements the interactive session with the server. This is called after | |
1294 | * the user has been authenticated, and a command has been started on the | |
4bf9c10e | 1295 | * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character |
1296 | * used as an escape character for terminating or suspending the session. | |
aa3378df | 1297 | */ |
8efc0c15 | 1298 | |
6ae2364d | 1299 | int |
2e73a022 | 1300 | client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) |
8efc0c15 | 1301 | { |
39929cdb | 1302 | fd_set *readset = NULL, *writeset = NULL; |
5260325f | 1303 | double start_time, total_time; |
9a995072 | 1304 | int max_fd = 0, max_fd2 = 0, len, rekeying = 0; |
1305 | u_int nalloc = 0; | |
5260325f | 1306 | char buf[100]; |
1307 | ||
1308 | debug("Entering interactive session."); | |
1309 | ||
1310 | start_time = get_current_time(); | |
1311 | ||
1312 | /* Initialize variables. */ | |
f17f705b | 1313 | escape_pending1 = 0; |
5260325f | 1314 | last_was_cr = 1; |
1315 | exit_status = -1; | |
1316 | stdin_eof = 0; | |
1317 | buffer_high = 64 * 1024; | |
1318 | connection_in = packet_get_connection_in(); | |
1319 | connection_out = packet_get_connection_out(); | |
39929cdb | 1320 | max_fd = MAX(connection_in, connection_out); |
3bcced4c | 1321 | if (muxserver_sock != -1) |
1322 | max_fd = MAX(max_fd, muxserver_sock); | |
39929cdb | 1323 | |
1324 | if (!compat20) { | |
e968270c | 1325 | /* enable nonblocking unless tty */ |
1326 | if (!isatty(fileno(stdin))) | |
1327 | set_nonblock(fileno(stdin)); | |
1328 | if (!isatty(fileno(stdout))) | |
1329 | set_nonblock(fileno(stdout)); | |
1330 | if (!isatty(fileno(stderr))) | |
1331 | set_nonblock(fileno(stderr)); | |
39929cdb | 1332 | max_fd = MAX(max_fd, fileno(stdin)); |
1333 | max_fd = MAX(max_fd, fileno(stdout)); | |
1334 | max_fd = MAX(max_fd, fileno(stderr)); | |
1335 | } | |
5260325f | 1336 | stdin_bytes = 0; |
1337 | stdout_bytes = 0; | |
1338 | stderr_bytes = 0; | |
1339 | quit_pending = 0; | |
f17f705b | 1340 | escape_char1 = escape_char_arg; |
5260325f | 1341 | |
1342 | /* Initialize buffers. */ | |
1343 | buffer_init(&stdin_buffer); | |
1344 | buffer_init(&stdout_buffer); | |
1345 | buffer_init(&stderr_buffer); | |
1346 | ||
7368a6c8 | 1347 | client_init_dispatch(); |
1348 | ||
3c93c917 | 1349 | /* |
1350 | * Set signal handlers, (e.g. to restore non-blocking mode) | |
1351 | * but don't overwrite SIG_IGN, matches behaviour from rsh(1) | |
1352 | */ | |
d3e5d1e9 | 1353 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
1354 | signal(SIGHUP, signal_handler); | |
3c93c917 | 1355 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
1356 | signal(SIGINT, signal_handler); | |
1357 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) | |
1358 | signal(SIGQUIT, signal_handler); | |
1359 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) | |
1360 | signal(SIGTERM, signal_handler); | |
2c9a4d41 | 1361 | signal(SIGWINCH, window_change_handler); |
5260325f | 1362 | |
5260325f | 1363 | if (have_pty) |
1364 | enter_raw_mode(); | |
1365 | ||
1fc8ccdf | 1366 | if (compat20) { |
1367 | session_ident = ssh2_chan_id; | |
f17f705b | 1368 | if (escape_char_arg != SSH_ESCAPECHAR_NONE) |
1fc8ccdf | 1369 | channel_register_filter(session_ident, |
f17f705b | 1370 | client_simple_escape_filter, NULL, |
e74caf1e | 1371 | client_filter_cleanup, |
f17f705b | 1372 | client_new_escape_filter_ctx(escape_char_arg)); |
eb0dd41f | 1373 | if (session_ident != -1) |
1374 | channel_register_cleanup(session_ident, | |
8cd0437d | 1375 | client_channel_closed, 0); |
1fc8ccdf | 1376 | } else { |
1377 | /* Check if we should immediately send eof on stdin. */ | |
8ce64345 | 1378 | client_check_initial_eof_on_stdin(); |
1fc8ccdf | 1379 | } |
2e73a022 | 1380 | |
5260325f | 1381 | /* Main loop of the client for the interactive session mode. */ |
1382 | while (!quit_pending) { | |
5260325f | 1383 | |
aa3378df | 1384 | /* Process buffered packets sent by the server. */ |
5260325f | 1385 | client_process_buffered_input_packets(); |
1386 | ||
eb0dd41f | 1387 | if (compat20 && session_closed && !channel_still_open()) |
8ce64345 | 1388 | break; |
eb0dd41f | 1389 | |
1390 | rekeying = (xxx_kex != NULL && !xxx_kex->done); | |
8ce64345 | 1391 | |
c422989b | 1392 | if (rekeying) { |
1393 | debug("rekeying in progress"); | |
1394 | } else { | |
1395 | /* | |
1396 | * Make packets of buffered stdin data, and buffer | |
1397 | * them for sending to the server. | |
1398 | */ | |
1399 | if (!compat20) | |
1400 | client_make_packets_from_stdin_data(); | |
5260325f | 1401 | |
c422989b | 1402 | /* |
1403 | * Make packets from buffered channel data, and | |
1404 | * enqueue them for sending to the server. | |
1405 | */ | |
1406 | if (packet_not_very_much_data_to_write()) | |
1407 | channel_output_poll(); | |
5260325f | 1408 | |
c422989b | 1409 | /* |
1410 | * Check if the window size has changed, and buffer a | |
1411 | * message about it to the server if so. | |
1412 | */ | |
1413 | client_check_window_change(); | |
5260325f | 1414 | |
c422989b | 1415 | if (quit_pending) |
1416 | break; | |
1417 | } | |
aa3378df | 1418 | /* |
1419 | * Wait until we have something to do (something becomes | |
1420 | * available on one of the descriptors). | |
1421 | */ | |
489aa2e9 | 1422 | max_fd2 = max_fd; |
c422989b | 1423 | client_wait_until_can_do_something(&readset, &writeset, |
489aa2e9 | 1424 | &max_fd2, &nalloc, rekeying); |
5260325f | 1425 | |
1426 | if (quit_pending) | |
1427 | break; | |
1428 | ||
c422989b | 1429 | /* Do channel operations unless rekeying in progress. */ |
1430 | if (!rekeying) { | |
1431 | channel_after_select(readset, writeset); | |
ffd7b36b | 1432 | if (need_rekeying || packet_need_rekeying()) { |
1433 | debug("need rekeying"); | |
c422989b | 1434 | xxx_kex->done = 0; |
1435 | kex_send_kexinit(xxx_kex); | |
1436 | need_rekeying = 0; | |
1437 | } | |
1438 | } | |
5260325f | 1439 | |
8ce64345 | 1440 | /* Buffer input from the connection. */ |
39929cdb | 1441 | client_process_net_input(readset); |
5260325f | 1442 | |
5e96b616 | 1443 | /* Accept control connections. */ |
3bcced4c | 1444 | if (muxserver_sock != -1 &&FD_ISSET(muxserver_sock, readset)) { |
1445 | if (muxserver_accept_control()) | |
1446 | quit_pending = 1; | |
1447 | } | |
5e96b616 | 1448 | |
8ce64345 | 1449 | if (quit_pending) |
1450 | break; | |
1451 | ||
1452 | if (!compat20) { | |
1453 | /* Buffer data from stdin */ | |
39929cdb | 1454 | client_process_input(readset); |
8ce64345 | 1455 | /* |
1456 | * Process output to stdout and stderr. Output to | |
1457 | * the connection is processed elsewhere (above). | |
1458 | */ | |
39929cdb | 1459 | client_process_output(writeset); |
8ce64345 | 1460 | } |
5260325f | 1461 | |
344f1d3d | 1462 | /* |
1463 | * Send as much buffered packet data as possible to the | |
1464 | * sender. | |
1465 | */ | |
39929cdb | 1466 | if (FD_ISSET(connection_out, writeset)) |
5260325f | 1467 | packet_write_poll(); |
1468 | } | |
39929cdb | 1469 | if (readset) |
1470 | xfree(readset); | |
1471 | if (writeset) | |
1472 | xfree(writeset); | |
5260325f | 1473 | |
1474 | /* Terminate the session. */ | |
1475 | ||
1476 | /* Stop watching for window change. */ | |
2c9a4d41 | 1477 | signal(SIGWINCH, SIG_DFL); |
5260325f | 1478 | |
d6746a0b | 1479 | channel_free_all(); |
5260325f | 1480 | |
c9130033 | 1481 | if (have_pty) |
1482 | leave_raw_mode(); | |
89aa792b | 1483 | |
1484 | /* restore blocking io */ | |
1485 | if (!isatty(fileno(stdin))) | |
1486 | unset_nonblock(fileno(stdin)); | |
1487 | if (!isatty(fileno(stdout))) | |
1488 | unset_nonblock(fileno(stdout)); | |
1489 | if (!isatty(fileno(stderr))) | |
1490 | unset_nonblock(fileno(stderr)); | |
1491 | ||
66357af5 | 1492 | /* |
1493 | * If there was no shell or command requested, there will be no remote | |
1494 | * exit status to be returned. In that case, clear error code if the | |
1495 | * connection was deliberately terminated at this end. | |
1496 | */ | |
1497 | if (no_shell_flag && received_signal == SIGTERM) { | |
1498 | received_signal = 0; | |
1499 | exit_status = 0; | |
1500 | } | |
1501 | ||
82de775c | 1502 | if (received_signal) |
010f9726 | 1503 | fatal("Killed by signal %d.", (int) received_signal); |
c9130033 | 1504 | |
1505 | /* | |
1506 | * In interactive mode (with pseudo tty) display a message indicating | |
1507 | * that the connection has been closed. | |
1508 | */ | |
1509 | if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { | |
344f1d3d | 1510 | snprintf(buf, sizeof buf, |
1511 | "Connection to %.64s closed.\r\n", host); | |
c9130033 | 1512 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
1513 | } | |
1514 | ||
5260325f | 1515 | /* Output any buffered data for stdout. */ |
89aa792b | 1516 | while (buffer_len(&stdout_buffer) > 0) { |
1517 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1518 | buffer_len(&stdout_buffer)); |
89aa792b | 1519 | if (len <= 0) { |
5260325f | 1520 | error("Write failed flushing stdout buffer."); |
89aa792b | 1521 | break; |
1522 | } | |
5260325f | 1523 | buffer_consume(&stdout_buffer, len); |
cd332296 | 1524 | stdout_bytes += len; |
8efc0c15 | 1525 | } |
5260325f | 1526 | |
1527 | /* Output any buffered data for stderr. */ | |
89aa792b | 1528 | while (buffer_len(&stderr_buffer) > 0) { |
1529 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1530 | buffer_len(&stderr_buffer)); |
89aa792b | 1531 | if (len <= 0) { |
5260325f | 1532 | error("Write failed flushing stderr buffer."); |
89aa792b | 1533 | break; |
1534 | } | |
5260325f | 1535 | buffer_consume(&stderr_buffer, len); |
cd332296 | 1536 | stderr_bytes += len; |
5260325f | 1537 | } |
1538 | ||
5260325f | 1539 | /* Clear and free any buffers. */ |
1540 | memset(buf, 0, sizeof(buf)); | |
1541 | buffer_free(&stdin_buffer); | |
1542 | buffer_free(&stdout_buffer); | |
1543 | buffer_free(&stderr_buffer); | |
1544 | ||
1545 | /* Report bytes transferred, and transfer rates. */ | |
1546 | total_time = get_current_time() - start_time; | |
344f1d3d | 1547 | debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f " |
1548 | "seconds", stdin_bytes, stdout_bytes, stderr_bytes, total_time); | |
5260325f | 1549 | if (total_time > 0) |
1550 | debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f", | |
184eed6a | 1551 | stdin_bytes / total_time, stdout_bytes / total_time, |
1552 | stderr_bytes / total_time); | |
5260325f | 1553 | |
1554 | /* Return the exit status of the program. */ | |
1555 | debug("Exit status %d", exit_status); | |
1556 | return exit_status; | |
8efc0c15 | 1557 | } |
7368a6c8 | 1558 | |
1559 | /*********/ | |
1560 | ||
396c147e | 1561 | static void |
7819b5c3 | 1562 | client_input_stdout_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1563 | { |
1e3b8b07 | 1564 | u_int data_len; |
7368a6c8 | 1565 | char *data = packet_get_string(&data_len); |
95500969 | 1566 | packet_check_eom(); |
7368a6c8 | 1567 | buffer_append(&stdout_buffer, data, data_len); |
7368a6c8 | 1568 | memset(data, 0, data_len); |
1569 | xfree(data); | |
1570 | } | |
396c147e | 1571 | static void |
7819b5c3 | 1572 | client_input_stderr_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1573 | { |
1e3b8b07 | 1574 | u_int data_len; |
7368a6c8 | 1575 | char *data = packet_get_string(&data_len); |
95500969 | 1576 | packet_check_eom(); |
7368a6c8 | 1577 | buffer_append(&stderr_buffer, data, data_len); |
7368a6c8 | 1578 | memset(data, 0, data_len); |
1579 | xfree(data); | |
1580 | } | |
396c147e | 1581 | static void |
7819b5c3 | 1582 | client_input_exit_status(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1583 | { |
7368a6c8 | 1584 | exit_status = packet_get_int(); |
95500969 | 1585 | packet_check_eom(); |
7368a6c8 | 1586 | /* Acknowledge the exit. */ |
1587 | packet_start(SSH_CMSG_EXIT_CONFIRMATION); | |
1588 | packet_send(); | |
1589 | /* | |
1590 | * Must wait for packet to be sent since we are | |
1591 | * exiting the loop. | |
1592 | */ | |
1593 | packet_write_wait(); | |
1594 | /* Flag that we want to exit. */ | |
1595 | quit_pending = 1; | |
1596 | } | |
c15706e2 | 1597 | static void |
1598 | client_input_agent_open(int type, u_int32_t seq, void *ctxt) | |
1599 | { | |
1600 | Channel *c = NULL; | |
1601 | int remote_id, sock; | |
1602 | ||
1603 | /* Read the remote channel number from the message. */ | |
1604 | remote_id = packet_get_int(); | |
1605 | packet_check_eom(); | |
1606 | ||
1607 | /* | |
1608 | * Get a connection to the local authentication agent (this may again | |
1609 | * get forwarded). | |
1610 | */ | |
1611 | sock = ssh_get_authentication_socket(); | |
1612 | ||
1613 | /* | |
1614 | * If we could not connect the agent, send an error message back to | |
1615 | * the server. This should never happen unless the agent dies, | |
1616 | * because authentication forwarding is only enabled if we have an | |
1617 | * agent. | |
1618 | */ | |
1619 | if (sock >= 0) { | |
1620 | c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, | |
1621 | -1, 0, 0, 0, "authentication agent connection", 1); | |
1622 | c->remote_id = remote_id; | |
1623 | c->force_drain = 1; | |
1624 | } | |
1625 | if (c == NULL) { | |
1626 | packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); | |
1627 | packet_put_int(remote_id); | |
1628 | } else { | |
1629 | /* Send a confirmation to the remote host. */ | |
1630 | debug("Forwarding authentication connection."); | |
1631 | packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1632 | packet_put_int(remote_id); | |
1633 | packet_put_int(c->self); | |
1634 | } | |
1635 | packet_send(); | |
1636 | } | |
7368a6c8 | 1637 | |
396c147e | 1638 | static Channel * |
fa08c86b | 1639 | client_request_forwarded_tcpip(const char *request_type, int rchan) |
1640 | { | |
343288b8 | 1641 | Channel *c = NULL; |
fa08c86b | 1642 | char *listen_address, *originator_address; |
1643 | int listen_port, originator_port; | |
fa08c86b | 1644 | |
1645 | /* Get rest of the packet */ | |
1646 | listen_address = packet_get_string(NULL); | |
1647 | listen_port = packet_get_int(); | |
1648 | originator_address = packet_get_string(NULL); | |
1649 | originator_port = packet_get_int(); | |
95500969 | 1650 | packet_check_eom(); |
fa08c86b | 1651 | |
e07e21ad | 1652 | debug("client_request_forwarded_tcpip: listen %s port %d, " |
1653 | "originator %s port %d", listen_address, listen_port, | |
1654 | originator_address, originator_port); | |
1655 | ||
1656 | c = channel_connect_by_listen_address(listen_port, | |
1657 | "forwarded-tcpip", originator_address); | |
fa08c86b | 1658 | |
fa08c86b | 1659 | xfree(originator_address); |
1660 | xfree(listen_address); | |
1661 | return c; | |
1662 | } | |
1663 | ||
343288b8 | 1664 | static Channel * |
fa08c86b | 1665 | client_request_x11(const char *request_type, int rchan) |
1666 | { | |
1667 | Channel *c = NULL; | |
1668 | char *originator; | |
1669 | int originator_port; | |
719fc62f | 1670 | int sock; |
fa08c86b | 1671 | |
1672 | if (!options.forward_x11) { | |
1673 | error("Warning: ssh server tried X11 forwarding."); | |
344f1d3d | 1674 | error("Warning: this is probably a break-in attempt by a " |
1675 | "malicious server."); | |
fa08c86b | 1676 | return NULL; |
1677 | } | |
1678 | originator = packet_get_string(NULL); | |
1679 | if (datafellows & SSH_BUG_X11FWD) { | |
1680 | debug2("buggy server: x11 request w/o originator_port"); | |
1681 | originator_port = 0; | |
1682 | } else { | |
1683 | originator_port = packet_get_int(); | |
1684 | } | |
95500969 | 1685 | packet_check_eom(); |
fa08c86b | 1686 | /* XXX check permission */ |
865ac82e | 1687 | debug("client_request_x11: request from %s %d", originator, |
1688 | originator_port); | |
719fc62f | 1689 | xfree(originator); |
fa08c86b | 1690 | sock = x11_connect_display(); |
719fc62f | 1691 | if (sock < 0) |
1692 | return NULL; | |
1693 | c = channel_new("x11", | |
1694 | SSH_CHANNEL_X11_OPEN, sock, sock, -1, | |
0d942eff | 1695 | CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); |
a5f82435 | 1696 | c->force_drain = 1; |
fa08c86b | 1697 | return c; |
1698 | } | |
1699 | ||
343288b8 | 1700 | static Channel * |
fa08c86b | 1701 | client_request_agent(const char *request_type, int rchan) |
1702 | { | |
1703 | Channel *c = NULL; | |
719fc62f | 1704 | int sock; |
fa08c86b | 1705 | |
1706 | if (!options.forward_agent) { | |
1707 | error("Warning: ssh server tried agent forwarding."); | |
344f1d3d | 1708 | error("Warning: this is probably a break-in attempt by a " |
1709 | "malicious server."); | |
fa08c86b | 1710 | return NULL; |
1711 | } | |
803c4226 | 1712 | sock = ssh_get_authentication_socket(); |
719fc62f | 1713 | if (sock < 0) |
1714 | return NULL; | |
1715 | c = channel_new("authentication agent connection", | |
1716 | SSH_CHANNEL_OPEN, sock, sock, -1, | |
016f1482 | 1717 | CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, |
0d942eff | 1718 | "authentication agent connection", 1); |
a5f82435 | 1719 | c->force_drain = 1; |
fa08c86b | 1720 | return c; |
1721 | } | |
1722 | ||
79303c5a | 1723 | int |
1724 | client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun) | |
1725 | { | |
1726 | Channel *c; | |
1727 | int fd; | |
1728 | ||
1729 | if (tun_mode == SSH_TUNMODE_NO) | |
1730 | return 0; | |
1731 | ||
1732 | if (!compat20) { | |
1733 | error("Tunnel forwarding is not support for protocol 1"); | |
1734 | return -1; | |
1735 | } | |
1736 | ||
1737 | debug("Requesting tun unit %d in mode %d", local_tun, tun_mode); | |
1738 | ||
1739 | /* Open local tunnel device */ | |
1740 | if ((fd = tun_open(local_tun, tun_mode)) == -1) { | |
1741 | error("Tunnel device open failed."); | |
1742 | return -1; | |
1743 | } | |
1744 | ||
1745 | c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, | |
1746 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); | |
1747 | c->datagram = 1; | |
1748 | ||
1749 | #if defined(SSH_TUN_FILTER) | |
1750 | if (options.tun_open == SSH_TUNMODE_POINTOPOINT) | |
1751 | channel_register_filter(c->self, sys_tun_infilter, | |
136d0181 | 1752 | sys_tun_outfilter, NULL, NULL); |
79303c5a | 1753 | #endif |
1754 | ||
1755 | packet_start(SSH2_MSG_CHANNEL_OPEN); | |
1756 | packet_put_cstring("tun@openssh.com"); | |
1757 | packet_put_int(c->self); | |
1758 | packet_put_int(c->local_window_max); | |
1759 | packet_put_int(c->local_maxpacket); | |
1760 | packet_put_int(tun_mode); | |
1761 | packet_put_int(remote_tun); | |
1762 | packet_send(); | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
0b242b12 | 1767 | /* XXXX move to generic input handler */ |
396c147e | 1768 | static void |
7819b5c3 | 1769 | client_input_channel_open(int type, u_int32_t seq, void *ctxt) |
0b242b12 | 1770 | { |
1771 | Channel *c = NULL; | |
1772 | char *ctype; | |
0b242b12 | 1773 | int rchan; |
f91d9a89 | 1774 | u_int rmaxpack, rwindow, len; |
0b242b12 | 1775 | |
1776 | ctype = packet_get_string(&len); | |
1777 | rchan = packet_get_int(); | |
1778 | rwindow = packet_get_int(); | |
1779 | rmaxpack = packet_get_int(); | |
1780 | ||
1d1ffb87 | 1781 | debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
0b242b12 | 1782 | ctype, rchan, rwindow, rmaxpack); |
1783 | ||
fa08c86b | 1784 | if (strcmp(ctype, "forwarded-tcpip") == 0) { |
1785 | c = client_request_forwarded_tcpip(ctype, rchan); | |
1786 | } else if (strcmp(ctype, "x11") == 0) { | |
1787 | c = client_request_x11(ctype, rchan); | |
1788 | } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { | |
1789 | c = client_request_agent(ctype, rchan); | |
0b242b12 | 1790 | } |
1791 | /* XXX duplicate : */ | |
1792 | if (c != NULL) { | |
1793 | debug("confirm %s", ctype); | |
1794 | c->remote_id = rchan; | |
1795 | c->remote_window = rwindow; | |
1796 | c->remote_maxpacket = rmaxpack; | |
a01a10dd | 1797 | if (c->type != SSH_CHANNEL_CONNECTING) { |
1798 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1799 | packet_put_int(c->remote_id); | |
1800 | packet_put_int(c->self); | |
1801 | packet_put_int(c->local_window); | |
1802 | packet_put_int(c->local_maxpacket); | |
1803 | packet_send(); | |
1804 | } | |
0b242b12 | 1805 | } else { |
1806 | debug("failure %s", ctype); | |
1807 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); | |
1808 | packet_put_int(rchan); | |
1809 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 1810 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
a01a10dd | 1811 | packet_put_cstring("open failed"); |
fbe90f7b | 1812 | packet_put_cstring(""); |
1813 | } | |
0b242b12 | 1814 | packet_send(); |
1815 | } | |
1816 | xfree(ctype); | |
1817 | } | |
396c147e | 1818 | static void |
7819b5c3 | 1819 | client_input_channel_req(int type, u_int32_t seq, void *ctxt) |
1fc8ccdf | 1820 | { |
1821 | Channel *c = NULL; | |
5e96b616 | 1822 | int exitval, id, reply, success = 0; |
1fc8ccdf | 1823 | char *rtype; |
1824 | ||
1825 | id = packet_get_int(); | |
1826 | rtype = packet_get_string(NULL); | |
1827 | reply = packet_get_char(); | |
1828 | ||
1829 | debug("client_input_channel_req: channel %d rtype %s reply %d", | |
1830 | id, rtype, reply); | |
1831 | ||
13de3560 | 1832 | if (id == -1) { |
1833 | error("client_input_channel_req: request for channel -1"); | |
1834 | } else if ((c = channel_lookup(id)) == NULL) { | |
344f1d3d | 1835 | error("client_input_channel_req: channel %d: " |
1836 | "unknown channel", id); | |
50c96367 | 1837 | } else if (strcmp(rtype, "eow@openssh.com") == 0) { |
1838 | packet_check_eom(); | |
1839 | chan_rcvd_eow(c); | |
1fc8ccdf | 1840 | } else if (strcmp(rtype, "exit-status") == 0) { |
5e96b616 | 1841 | exitval = packet_get_int(); |
1842 | if (id == session_ident) { | |
1843 | success = 1; | |
1844 | exit_status = exitval; | |
1845 | } else if (c->ctl_fd == -1) { | |
1846 | error("client_input_channel_req: unexpected channel %d", | |
1847 | session_ident); | |
1848 | } else { | |
1849 | atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval)); | |
1850 | success = 1; | |
1851 | } | |
95500969 | 1852 | packet_check_eom(); |
1fc8ccdf | 1853 | } |
1854 | if (reply) { | |
1855 | packet_start(success ? | |
1856 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
13de3560 | 1857 | packet_put_int(id); |
1fc8ccdf | 1858 | packet_send(); |
1859 | } | |
1860 | xfree(rtype); | |
1861 | } | |
3d209bbe | 1862 | static void |
1863 | client_input_global_request(int type, u_int32_t seq, void *ctxt) | |
1864 | { | |
1865 | char *rtype; | |
1866 | int want_reply; | |
1867 | int success = 0; | |
1868 | ||
1869 | rtype = packet_get_string(NULL); | |
1870 | want_reply = packet_get_char(); | |
5d8d32a3 | 1871 | debug("client_input_global_request: rtype %s want_reply %d", |
1872 | rtype, want_reply); | |
3d209bbe | 1873 | if (want_reply) { |
1874 | packet_start(success ? | |
1875 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
1876 | packet_send(); | |
1877 | packet_write_wait(); | |
1878 | } | |
1879 | xfree(rtype); | |
1880 | } | |
0b242b12 | 1881 | |
5e96b616 | 1882 | void |
f2107e97 | 1883 | client_session2_setup(int id, int want_tty, int want_subsystem, |
95d3c124 | 1884 | const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env) |
5e96b616 | 1885 | { |
1886 | int len; | |
2c9a4d41 | 1887 | Channel *c = NULL; |
5e96b616 | 1888 | |
1889 | debug2("%s: id %d", __func__, id); | |
1890 | ||
2c9a4d41 | 1891 | if ((c = channel_lookup(id)) == NULL) |
1892 | fatal("client_session2_setup: channel %d: unknown channel", id); | |
1893 | ||
5e96b616 | 1894 | if (want_tty) { |
1895 | struct winsize ws; | |
5e96b616 | 1896 | |
1897 | /* Store window size in the packet. */ | |
1898 | if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) | |
1899 | memset(&ws, 0, sizeof(ws)); | |
1900 | ||
95d3c124 | 1901 | channel_request_start(id, "pty-req", 1); |
1902 | client_expect_confirm(id, "PTY allocation", 0); | |
5e96b616 | 1903 | packet_put_cstring(term != NULL ? term : ""); |
148de80c | 1904 | packet_put_int((u_int)ws.ws_col); |
1905 | packet_put_int((u_int)ws.ws_row); | |
1906 | packet_put_int((u_int)ws.ws_xpixel); | |
1907 | packet_put_int((u_int)ws.ws_ypixel); | |
4651c790 | 1908 | if (tiop == NULL) |
1909 | tiop = get_saved_tio(); | |
1910 | tty_make_modes(-1, tiop); | |
5e96b616 | 1911 | packet_send(); |
1912 | /* XXX wait for reply */ | |
2c9a4d41 | 1913 | c->client_tty = 1; |
5e96b616 | 1914 | } |
1915 | ||
1916 | /* Transfer any environment variables from client to server */ | |
1786be35 | 1917 | if (options.num_send_env != 0 && env != NULL) { |
5e96b616 | 1918 | int i, j, matched; |
5e96b616 | 1919 | char *name, *val; |
1920 | ||
1921 | debug("Sending environment."); | |
1786be35 | 1922 | for (i = 0; env[i] != NULL; i++) { |
5e96b616 | 1923 | /* Split */ |
1786be35 | 1924 | name = xstrdup(env[i]); |
5e96b616 | 1925 | if ((val = strchr(name, '=')) == NULL) { |
8c4bd764 | 1926 | xfree(name); |
5e96b616 | 1927 | continue; |
1928 | } | |
1929 | *val++ = '\0'; | |
1930 | ||
1931 | matched = 0; | |
1932 | for (j = 0; j < options.num_send_env; j++) { | |
1933 | if (match_pattern(name, options.send_env[j])) { | |
1934 | matched = 1; | |
1935 | break; | |
1936 | } | |
1937 | } | |
1938 | if (!matched) { | |
1939 | debug3("Ignored env %s", name); | |
8c4bd764 | 1940 | xfree(name); |
5e96b616 | 1941 | continue; |
1942 | } | |
1943 | ||
1944 | debug("Sending env %s = %s", name, val); | |
1945 | channel_request_start(id, "env", 0); | |
1946 | packet_put_cstring(name); | |
1947 | packet_put_cstring(val); | |
1948 | packet_send(); | |
8c4bd764 | 1949 | xfree(name); |
5e96b616 | 1950 | } |
1951 | } | |
1952 | ||
1953 | len = buffer_len(cmd); | |
1954 | if (len > 0) { | |
1955 | if (len > 900) | |
1956 | len = 900; | |
1957 | if (want_subsystem) { | |
95d3c124 | 1958 | debug("Sending subsystem: %.*s", |
1959 | len, (u_char*)buffer_ptr(cmd)); | |
1960 | channel_request_start(id, "subsystem", 1); | |
1961 | client_expect_confirm(id, "subsystem", 1); | |
5e96b616 | 1962 | } else { |
95d3c124 | 1963 | debug("Sending command: %.*s", |
1964 | len, (u_char*)buffer_ptr(cmd)); | |
1965 | channel_request_start(id, "exec", 1); | |
1966 | client_expect_confirm(id, "exec", 1); | |
5e96b616 | 1967 | } |
1968 | packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); | |
1969 | packet_send(); | |
1970 | } else { | |
95d3c124 | 1971 | channel_request_start(id, "shell", 1); |
1972 | client_expect_confirm(id, "shell", 1); | |
5e96b616 | 1973 | packet_send(); |
1974 | } | |
1975 | } | |
1976 | ||
396c147e | 1977 | static void |
5ca51e19 | 1978 | client_init_dispatch_20(void) |
8ce64345 | 1979 | { |
7a37c112 | 1980 | dispatch_init(&dispatch_protocol_error); |
e0ae8728 | 1981 | |
8ce64345 | 1982 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
1983 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
1984 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
1985 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
0b242b12 | 1986 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
8ce64345 | 1987 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
1988 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1fc8ccdf | 1989 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
8ce64345 | 1990 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
3593bdc0 | 1991 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm); |
1992 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm); | |
3d209bbe | 1993 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); |
7a37c112 | 1994 | |
1995 | /* rekeying */ | |
1996 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e0ae8728 | 1997 | |
1998 | /* global request reply messages */ | |
1999 | dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); | |
2000 | dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); | |
8ce64345 | 2001 | } |
344f1d3d | 2002 | |
396c147e | 2003 | static void |
5ca51e19 | 2004 | client_init_dispatch_13(void) |
7368a6c8 | 2005 | { |
2006 | dispatch_init(NULL); | |
2007 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
2008 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
2009 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
7368a6c8 | 2010 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
2011 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
2012 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
7368a6c8 | 2013 | dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
2014 | dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); | |
2015 | dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); | |
a22aff1f | 2016 | |
2017 | dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? | |
c15706e2 | 2018 | &client_input_agent_open : &deny_input_open); |
a22aff1f | 2019 | dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
2020 | &x11_input_open : &deny_input_open); | |
7368a6c8 | 2021 | } |
344f1d3d | 2022 | |
396c147e | 2023 | static void |
5ca51e19 | 2024 | client_init_dispatch_15(void) |
7368a6c8 | 2025 | { |
2026 | client_init_dispatch_13(); | |
2027 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
2028 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); | |
2029 | } | |
344f1d3d | 2030 | |
eea46d13 | 2031 | static void |
5ca51e19 | 2032 | client_init_dispatch(void) |
7368a6c8 | 2033 | { |
8ce64345 | 2034 | if (compat20) |
2035 | client_init_dispatch_20(); | |
2036 | else if (compat13) | |
7368a6c8 | 2037 | client_init_dispatch_13(); |
2038 | else | |
2039 | client_init_dispatch_15(); | |
2040 | } | |
82de775c | 2041 | |
2042 | /* client specific fatal cleanup */ | |
2043 | void | |
2362db19 | 2044 | cleanup_exit(int i) |
82de775c | 2045 | { |
82de775c | 2046 | leave_raw_mode(); |
2047 | leave_non_blocking(); | |
3bcced4c | 2048 | if (options.control_path != NULL && muxserver_sock != -1) |
5e96b616 | 2049 | unlink(options.control_path); |
2362db19 | 2050 | _exit(i); |
82de775c | 2051 | } |