]>
Commit | Line | Data |
---|---|---|
ccd01778 | 1 | /* $OpenBSD: clientloop.c,v 1.216 2010/01/09 05:04:24 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 "match.h" |
111 | #include "msg.h" | |
d0137ef8 | 112 | #include "roaming.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 | ||
ccd01778 | 133 | /* Force TTY allocation */ |
134 | extern int force_tty_flag; | |
135 | ||
aa3378df | 136 | /* |
137 | * Flag to indicate that we have received a window change signal which has | |
138 | * not yet been processed. This will cause a message indicating the new | |
139 | * window size to be sent to the server a little later. This is volatile | |
140 | * because this is updated in a signal handler. | |
141 | */ | |
7a934d1b | 142 | static volatile sig_atomic_t received_window_change_signal = 0; |
143 | static volatile sig_atomic_t received_signal = 0; | |
8efc0c15 | 144 | |
7b9b0103 | 145 | /* Flag indicating whether the user's terminal is in non-blocking mode. */ |
8efc0c15 | 146 | static int in_non_blocking_mode = 0; |
147 | ||
148 | /* Common data for the client loop code. */ | |
50394f26 | 149 | static volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */ |
f17f705b | 150 | static int escape_char1; /* Escape character. (proto1 only) */ |
151 | static int escape_pending1; /* Last character was an escape (proto1 only) */ | |
5260325f | 152 | static int last_was_cr; /* Last character was a newline. */ |
344f1d3d | 153 | static int exit_status; /* Used to store the command exit status. */ |
154 | static int stdin_eof; /* EOF has been encountered on stderr. */ | |
5260325f | 155 | static Buffer stdin_buffer; /* Buffer for stdin data. */ |
156 | static Buffer stdout_buffer; /* Buffer for stdout data. */ | |
157 | static Buffer stderr_buffer; /* Buffer for stderr data. */ | |
1e3b8b07 | 158 | static u_int buffer_high;/* Soft max buffer size. */ |
5260325f | 159 | static int connection_in; /* Connection to server (input). */ |
160 | static int connection_out; /* Connection to server (output). */ | |
c422989b | 161 | static int need_rekeying; /* Set to non-zero if rekeying is requested. */ |
eb0dd41f | 162 | static int session_closed = 0; /* In SSH2: login session closed. */ |
8efc0c15 | 163 | |
396c147e | 164 | static void client_init_dispatch(void); |
8ce64345 | 165 | int session_ident = -1; |
166 | ||
bb466eca | 167 | int session_resumed = 0; |
168 | ||
f17f705b | 169 | /* Track escape per proto2 channel */ |
170 | struct escape_filter_ctx { | |
171 | int escape_pending; | |
172 | int escape_char; | |
173 | }; | |
174 | ||
175 | /* Context for channel confirmation replies */ | |
95d3c124 | 176 | struct channel_reply_ctx { |
177 | const char *request_type; | |
178 | int id, do_close; | |
179 | }; | |
180 | ||
72becb62 | 181 | /* Global request success/failure callbacks */ |
182 | struct global_confirm { | |
183 | TAILQ_ENTRY(global_confirm) entry; | |
184 | global_confirm_cb *cb; | |
185 | void *ctx; | |
186 | int ref_count; | |
187 | }; | |
188 | TAILQ_HEAD(global_confirms, global_confirm); | |
189 | static struct global_confirms global_confirms = | |
190 | TAILQ_HEAD_INITIALIZER(global_confirms); | |
191 | ||
e092ce67 | 192 | /*XXX*/ |
193 | extern Kex *xxx_kex; | |
194 | ||
5e96b616 | 195 | void ssh_process_session2_setup(int, int, int, Buffer *); |
196 | ||
8efc0c15 | 197 | /* Restores stdin to blocking mode. */ |
198 | ||
396c147e | 199 | static void |
5ca51e19 | 200 | leave_non_blocking(void) |
8efc0c15 | 201 | { |
5260325f | 202 | if (in_non_blocking_mode) { |
1b273ece | 203 | unset_nonblock(fileno(stdin)); |
5260325f | 204 | in_non_blocking_mode = 0; |
5260325f | 205 | } |
8efc0c15 | 206 | } |
207 | ||
5260325f | 208 | /* Puts stdin terminal in non-blocking mode. */ |
209 | ||
396c147e | 210 | static void |
5ca51e19 | 211 | enter_non_blocking(void) |
8efc0c15 | 212 | { |
5260325f | 213 | in_non_blocking_mode = 1; |
170694d7 | 214 | set_nonblock(fileno(stdin)); |
8efc0c15 | 215 | } |
216 | ||
aa3378df | 217 | /* |
218 | * Signal handler for the window change signal (SIGWINCH). This just sets a | |
219 | * flag indicating that the window has changed. | |
220 | */ | |
3efa8ea9 | 221 | /*ARGSUSED */ |
396c147e | 222 | static void |
5260325f | 223 | window_change_handler(int sig) |
8efc0c15 | 224 | { |
5260325f | 225 | received_window_change_signal = 1; |
226 | signal(SIGWINCH, window_change_handler); | |
8efc0c15 | 227 | } |
228 | ||
aa3378df | 229 | /* |
230 | * Signal handler for signals that cause the program to terminate. These | |
231 | * signals must be trapped to restore terminal modes. | |
232 | */ | |
3efa8ea9 | 233 | /*ARGSUSED */ |
396c147e | 234 | static void |
5260325f | 235 | signal_handler(int sig) |
8efc0c15 | 236 | { |
c9130033 | 237 | received_signal = sig; |
238 | quit_pending = 1; | |
8efc0c15 | 239 | } |
240 | ||
aa3378df | 241 | /* |
242 | * Returns current time in seconds from Jan 1, 1970 with the maximum | |
243 | * available resolution. | |
244 | */ | |
8efc0c15 | 245 | |
396c147e | 246 | static double |
5ca51e19 | 247 | get_current_time(void) |
8efc0c15 | 248 | { |
5260325f | 249 | struct timeval tv; |
250 | gettimeofday(&tv, NULL); | |
251 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; | |
8efc0c15 | 252 | } |
253 | ||
9bf083eb | 254 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
255 | void | |
256 | client_x11_get_proto(const char *display, const char *xauth_path, | |
257 | u_int trusted, char **_proto, char **_data) | |
258 | { | |
259 | char cmd[1024]; | |
260 | char line[512]; | |
261 | char xdisplay[512]; | |
262 | static char proto[512], data[512]; | |
263 | FILE *f; | |
264 | int got_data = 0, generated = 0, do_unlink = 0, i; | |
265 | char *xauthdir, *xauthfile; | |
266 | struct stat st; | |
267 | ||
268 | xauthdir = xauthfile = NULL; | |
269 | *_proto = proto; | |
270 | *_data = data; | |
271 | proto[0] = data[0] = '\0'; | |
272 | ||
273 | if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { | |
274 | debug("No xauth program."); | |
275 | } else { | |
276 | if (display == NULL) { | |
277 | debug("x11_get_proto: DISPLAY not set"); | |
278 | return; | |
279 | } | |
280 | /* | |
281 | * Handle FamilyLocal case where $DISPLAY does | |
282 | * not match an authorization entry. For this we | |
283 | * just try "xauth list unix:displaynum.screennum". | |
284 | * XXX: "localhost" match to determine FamilyLocal | |
285 | * is not perfect. | |
286 | */ | |
287 | if (strncmp(display, "localhost:", 10) == 0) { | |
288 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", | |
289 | display + 10); | |
290 | display = xdisplay; | |
291 | } | |
292 | if (trusted == 0) { | |
293 | xauthdir = xmalloc(MAXPATHLEN); | |
294 | xauthfile = xmalloc(MAXPATHLEN); | |
295 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); | |
296 | if (mkdtemp(xauthdir) != NULL) { | |
297 | do_unlink = 1; | |
298 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", | |
299 | xauthdir); | |
300 | snprintf(cmd, sizeof(cmd), | |
301 | "%s -f %s generate %s " SSH_X11_PROTO | |
302 | " untrusted timeout 1200 2>" _PATH_DEVNULL, | |
303 | xauth_path, xauthfile, display); | |
304 | debug2("x11_get_proto: %s", cmd); | |
305 | if (system(cmd) == 0) | |
306 | generated = 1; | |
307 | } | |
308 | } | |
ed64eeca | 309 | |
310 | /* | |
311 | * When in untrusted mode, we read the cookie only if it was | |
312 | * successfully generated as an untrusted one in the step | |
313 | * above. | |
314 | */ | |
315 | if (trusted || generated) { | |
316 | snprintf(cmd, sizeof(cmd), | |
317 | "%s %s%s list %s 2>" _PATH_DEVNULL, | |
318 | xauth_path, | |
319 | generated ? "-f " : "" , | |
320 | generated ? xauthfile : "", | |
321 | display); | |
322 | debug2("x11_get_proto: %s", cmd); | |
323 | f = popen(cmd, "r"); | |
324 | if (f && fgets(line, sizeof(line), f) && | |
325 | sscanf(line, "%*s %511s %511s", proto, data) == 2) | |
326 | got_data = 1; | |
327 | if (f) | |
328 | pclose(f); | |
329 | } else | |
330 | error("Warning: untrusted X11 forwarding setup failed: " | |
331 | "xauth key data not generated"); | |
9bf083eb | 332 | } |
333 | ||
334 | if (do_unlink) { | |
335 | unlink(xauthfile); | |
336 | rmdir(xauthdir); | |
337 | } | |
338 | if (xauthdir) | |
339 | xfree(xauthdir); | |
340 | if (xauthfile) | |
341 | xfree(xauthfile); | |
342 | ||
343 | /* | |
344 | * If we didn't get authentication data, just make up some | |
345 | * data. The forwarding code will check the validity of the | |
346 | * response anyway, and substitute this data. The X11 | |
347 | * server, however, will ignore this fake data and use | |
348 | * whatever authentication mechanisms it was using otherwise | |
349 | * for the local connection. | |
350 | */ | |
351 | if (!got_data) { | |
352 | u_int32_t rnd = 0; | |
353 | ||
354 | logit("Warning: No xauth data; " | |
355 | "using fake authentication data for X11 forwarding."); | |
356 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); | |
357 | for (i = 0; i < 16; i++) { | |
358 | if (i % 4 == 0) | |
359 | rnd = arc4random(); | |
360 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", | |
361 | rnd & 0xff); | |
362 | rnd >>= 8; | |
363 | } | |
364 | } | |
365 | } | |
366 | ||
aa3378df | 367 | /* |
368 | * This is called when the interactive is entered. This checks if there is | |
369 | * an EOF coming on stdin. We must check this explicitly, as select() does | |
370 | * not appear to wake up when redirecting from /dev/null. | |
371 | */ | |
8efc0c15 | 372 | |
396c147e | 373 | static void |
5ca51e19 | 374 | client_check_initial_eof_on_stdin(void) |
8efc0c15 | 375 | { |
5260325f | 376 | int len; |
377 | char buf[1]; | |
378 | ||
aa3378df | 379 | /* |
380 | * If standard input is to be "redirected from /dev/null", we simply | |
381 | * mark that we have seen an EOF and send an EOF message to the | |
382 | * server. Otherwise, we try to read a single character; it appears | |
383 | * that for some files, such /dev/null, select() never wakes up for | |
384 | * read for this descriptor, which means that we never get EOF. This | |
385 | * way we will get the EOF if stdin comes from /dev/null or similar. | |
386 | */ | |
5260325f | 387 | if (stdin_null_flag) { |
388 | /* Fake EOF on stdin. */ | |
389 | debug("Sending eof."); | |
390 | stdin_eof = 1; | |
391 | packet_start(SSH_CMSG_EOF); | |
392 | packet_send(); | |
393 | } else { | |
5260325f | 394 | enter_non_blocking(); |
395 | ||
396 | /* Check for immediate EOF on stdin. */ | |
397 | len = read(fileno(stdin), buf, 1); | |
398 | if (len == 0) { | |
344f1d3d | 399 | /* |
400 | * EOF. Record that we have seen it and send | |
401 | * EOF to server. | |
402 | */ | |
5260325f | 403 | debug("Sending eof."); |
404 | stdin_eof = 1; | |
405 | packet_start(SSH_CMSG_EOF); | |
406 | packet_send(); | |
407 | } else if (len > 0) { | |
aa3378df | 408 | /* |
409 | * Got data. We must store the data in the buffer, | |
410 | * and also process it as an escape character if | |
411 | * appropriate. | |
412 | */ | |
f17f705b | 413 | if ((u_char) buf[0] == escape_char1) |
414 | escape_pending1 = 1; | |
7e8911cd | 415 | else |
5260325f | 416 | buffer_append(&stdin_buffer, buf, 1); |
5260325f | 417 | } |
5260325f | 418 | leave_non_blocking(); |
8efc0c15 | 419 | } |
8efc0c15 | 420 | } |
421 | ||
8efc0c15 | 422 | |
aa3378df | 423 | /* |
424 | * Make packets from buffered stdin data, and buffer them for sending to the | |
425 | * connection. | |
426 | */ | |
8efc0c15 | 427 | |
396c147e | 428 | static void |
5ca51e19 | 429 | client_make_packets_from_stdin_data(void) |
8efc0c15 | 430 | { |
1e3b8b07 | 431 | u_int len; |
5260325f | 432 | |
433 | /* Send buffered stdin data to the server. */ | |
434 | while (buffer_len(&stdin_buffer) > 0 && | |
184eed6a | 435 | packet_not_very_much_data_to_write()) { |
5260325f | 436 | len = buffer_len(&stdin_buffer); |
437 | /* Keep the packets at reasonable size. */ | |
438 | if (len > packet_get_maxsize()) | |
439 | len = packet_get_maxsize(); | |
440 | packet_start(SSH_CMSG_STDIN_DATA); | |
441 | packet_put_string(buffer_ptr(&stdin_buffer), len); | |
442 | packet_send(); | |
443 | buffer_consume(&stdin_buffer, len); | |
444 | /* If we have a pending EOF, send it now. */ | |
445 | if (stdin_eof && buffer_len(&stdin_buffer) == 0) { | |
446 | packet_start(SSH_CMSG_EOF); | |
447 | packet_send(); | |
448 | } | |
8efc0c15 | 449 | } |
8efc0c15 | 450 | } |
451 | ||
aa3378df | 452 | /* |
453 | * Checks if the client window has changed, and sends a packet about it to | |
454 | * the server if so. The actual change is detected elsewhere (by a software | |
455 | * interrupt on Unix); this just checks the flag and sends a message if | |
456 | * appropriate. | |
457 | */ | |
8efc0c15 | 458 | |
396c147e | 459 | static void |
5ca51e19 | 460 | client_check_window_change(void) |
8efc0c15 | 461 | { |
8ce64345 | 462 | struct winsize ws; |
463 | ||
464 | if (! received_window_change_signal) | |
465 | return; | |
466 | /** XXX race */ | |
467 | received_window_change_signal = 0; | |
468 | ||
de273eef | 469 | debug2("client_check_window_change: changed"); |
8ce64345 | 470 | |
471 | if (compat20) { | |
5e96b616 | 472 | channel_send_window_changes(); |
8ce64345 | 473 | } else { |
5e96b616 | 474 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
475 | return; | |
8ce64345 | 476 | packet_start(SSH_CMSG_WINDOW_SIZE); |
148de80c | 477 | packet_put_int((u_int)ws.ws_row); |
478 | packet_put_int((u_int)ws.ws_col); | |
479 | packet_put_int((u_int)ws.ws_xpixel); | |
480 | packet_put_int((u_int)ws.ws_ypixel); | |
8ce64345 | 481 | packet_send(); |
8efc0c15 | 482 | } |
8efc0c15 | 483 | } |
484 | ||
5d8d32a3 | 485 | static void |
486 | client_global_request_reply(int type, u_int32_t seq, void *ctxt) | |
487 | { | |
72becb62 | 488 | struct global_confirm *gc; |
489 | ||
490 | if ((gc = TAILQ_FIRST(&global_confirms)) == NULL) | |
491 | return; | |
492 | if (gc->cb != NULL) | |
493 | gc->cb(type, seq, gc->ctx); | |
494 | if (--gc->ref_count <= 0) { | |
495 | TAILQ_REMOVE(&global_confirms, gc, entry); | |
496 | bzero(gc, sizeof(*gc)); | |
497 | xfree(gc); | |
498 | } | |
499 | ||
dc1f1948 | 500 | packet_set_alive_timeouts(0); |
5d8d32a3 | 501 | } |
502 | ||
503 | static void | |
504 | server_alive_check(void) | |
505 | { | |
dc1f1948 | 506 | if (packet_inc_alive_timeouts() > options.server_alive_count_max) { |
bd3b2cb2 | 507 | logit("Timeout, server not responding."); |
508 | cleanup_exit(255); | |
509 | } | |
5d8d32a3 | 510 | packet_start(SSH2_MSG_GLOBAL_REQUEST); |
511 | packet_put_cstring("keepalive@openssh.com"); | |
512 | packet_put_char(1); /* boolean: want reply */ | |
513 | packet_send(); | |
72becb62 | 514 | /* Insert an empty placeholder to maintain ordering */ |
515 | client_register_global_confirm(NULL, NULL); | |
5d8d32a3 | 516 | } |
517 | ||
aa3378df | 518 | /* |
519 | * Waits until the client can do something (some data becomes available on | |
520 | * one of the file descriptors). | |
521 | */ | |
396c147e | 522 | static void |
39929cdb | 523 | client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
9a995072 | 524 | int *maxfdp, u_int *nallocp, int rekeying) |
8efc0c15 | 525 | { |
5d8d32a3 | 526 | struct timeval tv, *tvp; |
527 | int ret; | |
528 | ||
39929cdb | 529 | /* Add any selections by the channel mechanism. */ |
489aa2e9 | 530 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); |
5260325f | 531 | |
8ce64345 | 532 | if (!compat20) { |
533 | /* Read from the connection, unless our buffers are full. */ | |
534 | if (buffer_len(&stdout_buffer) < buffer_high && | |
535 | buffer_len(&stderr_buffer) < buffer_high && | |
536 | channel_not_very_much_buffered_data()) | |
39929cdb | 537 | FD_SET(connection_in, *readsetp); |
8ce64345 | 538 | /* |
539 | * Read from stdin, unless we have seen EOF or have very much | |
540 | * buffered data to send to the server. | |
541 | */ | |
542 | if (!stdin_eof && packet_not_very_much_data_to_write()) | |
39929cdb | 543 | FD_SET(fileno(stdin), *readsetp); |
8ce64345 | 544 | |
545 | /* Select stdout/stderr if have data in buffer. */ | |
546 | if (buffer_len(&stdout_buffer) > 0) | |
39929cdb | 547 | FD_SET(fileno(stdout), *writesetp); |
8ce64345 | 548 | if (buffer_len(&stderr_buffer) > 0) |
39929cdb | 549 | FD_SET(fileno(stderr), *writesetp); |
8ce64345 | 550 | } else { |
24b6b45f | 551 | /* channel_prepare_select could have closed the last channel */ |
fd6cfbaf | 552 | if (session_closed && !channel_still_open() && |
553 | !packet_have_data_to_write()) { | |
554 | /* clear mask since we did not call select() */ | |
b3ad8fe6 | 555 | memset(*readsetp, 0, *nallocp); |
556 | memset(*writesetp, 0, *nallocp); | |
fd6cfbaf | 557 | return; |
24b6b45f | 558 | } else { |
559 | FD_SET(connection_in, *readsetp); | |
560 | } | |
8ce64345 | 561 | } |
5260325f | 562 | |
5260325f | 563 | /* Select server connection if have data to write to the server. */ |
564 | if (packet_have_data_to_write()) | |
39929cdb | 565 | FD_SET(connection_out, *writesetp); |
5260325f | 566 | |
3bcced4c | 567 | if (muxserver_sock != -1) |
568 | FD_SET(muxserver_sock, *readsetp); | |
5e96b616 | 569 | |
aa3378df | 570 | /* |
571 | * Wait for something to happen. This will suspend the process until | |
572 | * some selected descriptor can be read, written, or has some other | |
5d8d32a3 | 573 | * event pending. |
aa3378df | 574 | */ |
5260325f | 575 | |
5d8d32a3 | 576 | if (options.server_alive_interval == 0 || !compat20) |
577 | tvp = NULL; | |
f2107e97 | 578 | else { |
5d8d32a3 | 579 | tv.tv_sec = options.server_alive_interval; |
580 | tv.tv_usec = 0; | |
581 | tvp = &tv; | |
582 | } | |
583 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); | |
584 | if (ret < 0) { | |
5260325f | 585 | char buf[100]; |
fd193ca4 | 586 | |
587 | /* | |
588 | * We have to clear the select masks, because we return. | |
589 | * We have to return, because the mainloop checks for the flags | |
590 | * set by the signal handlers. | |
591 | */ | |
b3ad8fe6 | 592 | memset(*readsetp, 0, *nallocp); |
593 | memset(*writesetp, 0, *nallocp); | |
fd193ca4 | 594 | |
5260325f | 595 | if (errno == EINTR) |
596 | return; | |
597 | /* Note: we might still have data in the buffers. */ | |
598 | snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); | |
599 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 600 | quit_pending = 1; |
5d8d32a3 | 601 | } else if (ret == 0) |
602 | server_alive_check(); | |
8efc0c15 | 603 | } |
604 | ||
396c147e | 605 | static void |
2e73a022 | 606 | client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
8efc0c15 | 607 | { |
5260325f | 608 | /* Flush stdout and stderr buffers. */ |
2e73a022 | 609 | if (buffer_len(bout) > 0) |
344f1d3d | 610 | atomicio(vwrite, fileno(stdout), buffer_ptr(bout), |
611 | buffer_len(bout)); | |
2e73a022 | 612 | if (buffer_len(berr) > 0) |
344f1d3d | 613 | atomicio(vwrite, fileno(stderr), buffer_ptr(berr), |
614 | buffer_len(berr)); | |
5260325f | 615 | |
ccd01778 | 616 | leave_raw_mode(force_tty_flag); |
5260325f | 617 | |
aa3378df | 618 | /* |
619 | * Free (and clear) the buffer to reduce the amount of data that gets | |
620 | * written to swap. | |
621 | */ | |
2e73a022 | 622 | buffer_free(bin); |
623 | buffer_free(bout); | |
624 | buffer_free(berr); | |
5260325f | 625 | |
5260325f | 626 | /* Send the suspend signal to the program itself. */ |
627 | kill(getpid(), SIGTSTP); | |
628 | ||
2c9a4d41 | 629 | /* Reset window sizes in case they have changed */ |
630 | received_window_change_signal = 1; | |
5260325f | 631 | |
632 | /* OK, we have been continued by the user. Reinitialize buffers. */ | |
2e73a022 | 633 | buffer_init(bin); |
634 | buffer_init(bout); | |
635 | buffer_init(berr); | |
5260325f | 636 | |
ccd01778 | 637 | enter_raw_mode(force_tty_flag); |
8efc0c15 | 638 | } |
639 | ||
396c147e | 640 | static void |
b476adfa | 641 | client_process_net_input(fd_set *readset) |
8efc0c15 | 642 | { |
d0137ef8 | 643 | int len, cont = 0; |
e7ac4a90 | 644 | char buf[SSH_IOBUFSZ]; |
5260325f | 645 | |
aa3378df | 646 | /* |
647 | * Read input from the server, and add any such data to the buffer of | |
648 | * the packet subsystem. | |
649 | */ | |
5260325f | 650 | if (FD_ISSET(connection_in, readset)) { |
651 | /* Read as much as possible. */ | |
d0137ef8 | 652 | len = roaming_read(connection_in, buf, sizeof(buf), &cont); |
653 | if (len == 0 && cont == 0) { | |
344f1d3d | 654 | /* |
655 | * Received EOF. The remote host has closed the | |
656 | * connection. | |
657 | */ | |
658 | snprintf(buf, sizeof buf, | |
659 | "Connection to %.300s closed by remote host.\r\n", | |
660 | host); | |
8efc0c15 | 661 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
8efc0c15 | 662 | quit_pending = 1; |
663 | return; | |
5260325f | 664 | } |
aa3378df | 665 | /* |
666 | * There is a kernel bug on Solaris that causes select to | |
667 | * sometimes wake up even though there is no data available. | |
668 | */ | |
5a0c8771 | 669 | if (len < 0 && |
670 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) | |
5260325f | 671 | len = 0; |
672 | ||
673 | if (len < 0) { | |
344f1d3d | 674 | /* |
675 | * An error has encountered. Perhaps there is a | |
676 | * network problem. | |
677 | */ | |
678 | snprintf(buf, sizeof buf, | |
679 | "Read from remote host %.300s: %.100s\r\n", | |
680 | host, strerror(errno)); | |
5260325f | 681 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
5260325f | 682 | quit_pending = 1; |
683 | return; | |
684 | } | |
685 | packet_process_incoming(buf, len); | |
686 | } | |
8ce64345 | 687 | } |
688 | ||
5e96b616 | 689 | static void |
95d3c124 | 690 | client_status_confirm(int type, Channel *c, void *ctx) |
5e96b616 | 691 | { |
95d3c124 | 692 | struct channel_reply_ctx *cr = (struct channel_reply_ctx *)ctx; |
693 | char errmsg[256]; | |
694 | int tochan; | |
695 | ||
696 | /* XXX supress on mux _client_ quietmode */ | |
697 | tochan = options.log_level >= SYSLOG_LEVEL_ERROR && | |
698 | c->ctl_fd != -1 && c->extended_usage == CHAN_EXTENDED_WRITE; | |
699 | ||
700 | if (type == SSH2_MSG_CHANNEL_SUCCESS) { | |
701 | debug2("%s request accepted on channel %d", | |
702 | cr->request_type, c->self); | |
703 | } else if (type == SSH2_MSG_CHANNEL_FAILURE) { | |
704 | if (tochan) { | |
705 | snprintf(errmsg, sizeof(errmsg), | |
706 | "%s request failed\r\n", cr->request_type); | |
707 | } else { | |
708 | snprintf(errmsg, sizeof(errmsg), | |
709 | "%s request failed on channel %d", | |
710 | cr->request_type, c->self); | |
711 | } | |
712 | /* If error occurred on primary session channel, then exit */ | |
713 | if (cr->do_close && c->self == session_ident) | |
714 | fatal("%s", errmsg); | |
715 | /* If error occurred on mux client, append to their stderr */ | |
716 | if (tochan) | |
717 | buffer_append(&c->extended, errmsg, strlen(errmsg)); | |
718 | else | |
719 | error("%s", errmsg); | |
720 | if (cr->do_close) { | |
721 | chan_read_failed(c); | |
722 | chan_write_failed(c); | |
723 | } | |
724 | } | |
725 | xfree(cr); | |
726 | } | |
f2107e97 | 727 | |
95d3c124 | 728 | static void |
729 | client_abandon_status_confirm(Channel *c, void *ctx) | |
730 | { | |
731 | xfree(ctx); | |
732 | } | |
5e96b616 | 733 | |
95d3c124 | 734 | static void |
735 | client_expect_confirm(int id, const char *request, int do_close) | |
736 | { | |
737 | struct channel_reply_ctx *cr = xmalloc(sizeof(*cr)); | |
5e96b616 | 738 | |
95d3c124 | 739 | cr->request_type = request; |
740 | cr->do_close = do_close; | |
741 | ||
742 | channel_register_status_confirm(id, client_status_confirm, | |
743 | client_abandon_status_confirm, cr); | |
5e96b616 | 744 | } |
745 | ||
72becb62 | 746 | void |
747 | client_register_global_confirm(global_confirm_cb *cb, void *ctx) | |
748 | { | |
dfe666f6 | 749 | struct global_confirm *gc, *last_gc; |
72becb62 | 750 | |
751 | /* Coalesce identical callbacks */ | |
dfe666f6 | 752 | last_gc = TAILQ_LAST(&global_confirms, global_confirms); |
753 | if (last_gc && last_gc->cb == cb && last_gc->ctx == ctx) { | |
754 | if (++last_gc->ref_count >= INT_MAX) | |
755 | fatal("%s: last_gc->ref_count = %d", | |
756 | __func__, last_gc->ref_count); | |
72becb62 | 757 | return; |
758 | } | |
759 | ||
760 | gc = xmalloc(sizeof(*gc)); | |
761 | gc->cb = cb; | |
762 | gc->ctx = ctx; | |
763 | gc->ref_count = 1; | |
764 | TAILQ_INSERT_TAIL(&global_confirms, gc, entry); | |
765 | } | |
766 | ||
c53c54c2 | 767 | static void |
ec9b7086 | 768 | process_cmdline(void) |
c53c54c2 | 769 | { |
c53c54c2 | 770 | void (*handler)(int); |
3867aa0a | 771 | char *s, *cmd, *cancel_host; |
d740ec16 | 772 | int delete = 0; |
10cf2ac3 | 773 | int local = 0, remote = 0, dynamic = 0; |
5134115d | 774 | int cancel_port; |
3867aa0a | 775 | Forward fwd; |
c53c54c2 | 776 | |
16912319 | 777 | bzero(&fwd, sizeof(fwd)); |
778 | fwd.listen_host = fwd.connect_host = NULL; | |
779 | ||
ccd01778 | 780 | leave_raw_mode(force_tty_flag); |
875ec275 | 781 | handler = signal(SIGINT, SIG_IGN); |
ec9b7086 | 782 | cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); |
c53c54c2 | 783 | if (s == NULL) |
784 | goto out; | |
f48fbab3 | 785 | while (isspace(*s)) |
c53c54c2 | 786 | s++; |
d740ec16 | 787 | if (*s == '-') |
788 | s++; /* Skip cmdline '-', if any */ | |
27c6fcae | 789 | if (*s == '\0') |
c53c54c2 | 790 | goto out; |
d740ec16 | 791 | |
7069a5e2 | 792 | if (*s == 'h' || *s == 'H' || *s == '?') { |
d740ec16 | 793 | logit("Commands:"); |
9f1090be | 794 | logit(" -L[bind_address:]port:host:hostport " |
795 | "Request local forward"); | |
796 | logit(" -R[bind_address:]port:host:hostport " | |
797 | "Request remote forward"); | |
10cf2ac3 | 798 | logit(" -D[bind_address:]port " |
799 | "Request dynamic forward"); | |
33f13fa5 | 800 | logit(" -KR[bind_address:]port " |
9f1090be | 801 | "Cancel remote forward"); |
d20f3c9e | 802 | if (!options.permit_local_command) |
803 | goto out; | |
9f1090be | 804 | logit(" !args " |
805 | "Execute local command"); | |
d20f3c9e | 806 | goto out; |
807 | } | |
808 | ||
809 | if (*s == '!' && options.permit_local_command) { | |
810 | s++; | |
811 | ssh_local_cmd(s); | |
d740ec16 | 812 | goto out; |
813 | } | |
814 | ||
815 | if (*s == 'K') { | |
816 | delete = 1; | |
817 | s++; | |
818 | } | |
10cf2ac3 | 819 | if (*s == 'L') |
820 | local = 1; | |
821 | else if (*s == 'R') | |
822 | remote = 1; | |
823 | else if (*s == 'D') | |
824 | dynamic = 1; | |
825 | else { | |
bbe88b6d | 826 | logit("Invalid command."); |
c53c54c2 | 827 | goto out; |
828 | } | |
10cf2ac3 | 829 | |
830 | if ((local || dynamic) && delete) { | |
d740ec16 | 831 | logit("Not supported."); |
832 | goto out; | |
833 | } | |
10cf2ac3 | 834 | if (remote && delete && !compat20) { |
bbe88b6d | 835 | logit("Not supported for SSH protocol version 1."); |
c53c54c2 | 836 | goto out; |
837 | } | |
d740ec16 | 838 | |
f48fbab3 | 839 | while (isspace(*++s)) |
840 | ; | |
c53c54c2 | 841 | |
d740ec16 | 842 | if (delete) { |
3867aa0a | 843 | cancel_port = 0; |
844 | cancel_host = hpdelim(&s); /* may be NULL */ | |
845 | if (s != NULL) { | |
846 | cancel_port = a2port(s); | |
847 | cancel_host = cleanhostname(cancel_host); | |
848 | } else { | |
849 | cancel_port = a2port(cancel_host); | |
850 | cancel_host = NULL; | |
d740ec16 | 851 | } |
5134115d | 852 | if (cancel_port <= 0) { |
3867aa0a | 853 | logit("Bad forwarding close port"); |
c53c54c2 | 854 | goto out; |
855 | } | |
3867aa0a | 856 | channel_request_rforward_cancel(cancel_host, cancel_port); |
d740ec16 | 857 | } else { |
17525a70 | 858 | if (!parse_forward(&fwd, s, dynamic, remote)) { |
d740ec16 | 859 | logit("Bad forwarding specification."); |
860 | goto out; | |
861 | } | |
10cf2ac3 | 862 | if (local || dynamic) { |
3867aa0a | 863 | if (channel_setup_local_fwd_listener(fwd.listen_host, |
864 | fwd.listen_port, fwd.connect_host, | |
865 | fwd.connect_port, options.gateway_ports) < 0) { | |
d740ec16 | 866 | logit("Port forwarding failed."); |
867 | goto out; | |
868 | } | |
3867aa0a | 869 | } else { |
42ea6f5e | 870 | if (channel_request_remote_forwarding(fwd.listen_host, |
3867aa0a | 871 | fwd.listen_port, fwd.connect_host, |
42ea6f5e | 872 | fwd.connect_port) < 0) { |
873 | logit("Port forwarding failed."); | |
874 | goto out; | |
875 | } | |
3867aa0a | 876 | } |
877 | ||
d740ec16 | 878 | logit("Forwarding port."); |
879 | } | |
880 | ||
c53c54c2 | 881 | out: |
882 | signal(SIGINT, handler); | |
ccd01778 | 883 | enter_raw_mode(force_tty_flag); |
c53c54c2 | 884 | if (cmd) |
885 | xfree(cmd); | |
16912319 | 886 | if (fwd.listen_host != NULL) |
887 | xfree(fwd.listen_host); | |
888 | if (fwd.connect_host != NULL) | |
889 | xfree(fwd.connect_host); | |
c53c54c2 | 890 | } |
891 | ||
f17f705b | 892 | /* |
893 | * Process the characters one by one, call with c==NULL for proto1 case. | |
894 | */ | |
396c147e | 895 | static int |
f17f705b | 896 | process_escapes(Channel *c, Buffer *bin, Buffer *bout, Buffer *berr, |
897 | char *buf, int len) | |
2e73a022 | 898 | { |
899 | char string[1024]; | |
900 | pid_t pid; | |
901 | int bytes = 0; | |
1e3b8b07 | 902 | u_int i; |
903 | u_char ch; | |
2e73a022 | 904 | char *s; |
f17f705b | 905 | int *escape_pendingp, escape_char; |
906 | struct escape_filter_ctx *efc; | |
2e73a022 | 907 | |
f17f705b | 908 | if (c == NULL) { |
909 | escape_pendingp = &escape_pending1; | |
910 | escape_char = escape_char1; | |
911 | } else { | |
912 | if (c->filter_ctx == NULL) | |
913 | return 0; | |
914 | efc = (struct escape_filter_ctx *)c->filter_ctx; | |
915 | escape_pendingp = &efc->escape_pending; | |
916 | escape_char = efc->escape_char; | |
917 | } | |
918 | ||
2ceb8101 | 919 | if (len <= 0) |
920 | return (0); | |
921 | ||
922 | for (i = 0; i < (u_int)len; i++) { | |
2e73a022 | 923 | /* Get one character at a time. */ |
924 | ch = buf[i]; | |
925 | ||
f17f705b | 926 | if (*escape_pendingp) { |
2e73a022 | 927 | /* We have previously seen an escape character. */ |
928 | /* Clear the flag now. */ | |
f17f705b | 929 | *escape_pendingp = 0; |
2e73a022 | 930 | |
931 | /* Process the escaped character. */ | |
932 | switch (ch) { | |
933 | case '.': | |
934 | /* Terminate the connection. */ | |
f17f705b | 935 | snprintf(string, sizeof string, "%c.\r\n", |
936 | escape_char); | |
2e73a022 | 937 | buffer_append(berr, string, strlen(string)); |
2e73a022 | 938 | |
f17f705b | 939 | if (c && c->ctl_fd != -1) { |
940 | chan_read_failed(c); | |
941 | chan_write_failed(c); | |
942 | return 0; | |
943 | } else | |
944 | quit_pending = 1; | |
2e73a022 | 945 | return -1; |
946 | ||
947 | case 'Z' - 64: | |
f17f705b | 948 | /* XXX support this for mux clients */ |
949 | if (c && c->ctl_fd != -1) { | |
950 | noescape: | |
951 | snprintf(string, sizeof string, | |
952 | "%c%c escape not available to " | |
953 | "multiplexed sessions\r\n", | |
954 | escape_char, ch); | |
955 | buffer_append(berr, string, | |
956 | strlen(string)); | |
957 | continue; | |
958 | } | |
344f1d3d | 959 | /* Suspend the program. Inform the user */ |
f17f705b | 960 | snprintf(string, sizeof string, |
961 | "%c^Z [suspend ssh]\r\n", escape_char); | |
2e73a022 | 962 | buffer_append(berr, string, strlen(string)); |
2e73a022 | 963 | |
964 | /* Restore terminal modes and suspend. */ | |
965 | client_suspend_self(bin, bout, berr); | |
966 | ||
967 | /* We have been continued. */ | |
968 | continue; | |
969 | ||
16a79097 | 970 | case 'B': |
971 | if (compat20) { | |
972 | snprintf(string, sizeof string, | |
973 | "%cB\r\n", escape_char); | |
974 | buffer_append(berr, string, | |
975 | strlen(string)); | |
976 | channel_request_start(session_ident, | |
977 | "break", 0); | |
978 | packet_put_int(1000); | |
979 | packet_send(); | |
980 | } | |
981 | continue; | |
982 | ||
e092ce67 | 983 | case 'R': |
54506d2e | 984 | if (compat20) { |
985 | if (datafellows & SSH_BUG_NOREKEY) | |
344f1d3d | 986 | logit("Server does not " |
987 | "support re-keying"); | |
54506d2e | 988 | else |
989 | need_rekeying = 1; | |
990 | } | |
e092ce67 | 991 | continue; |
992 | ||
2e73a022 | 993 | case '&': |
f17f705b | 994 | if (c && c->ctl_fd != -1) |
995 | goto noescape; | |
2e73a022 | 996 | /* |
344f1d3d | 997 | * Detach the program (continue to serve |
998 | * connections, but put in background and no | |
999 | * more new connections). | |
2e73a022 | 1000 | */ |
2e73a022 | 1001 | /* Restore tty modes. */ |
ccd01778 | 1002 | leave_raw_mode(force_tty_flag); |
2e73a022 | 1003 | |
1004 | /* Stop listening for new connections. */ | |
c6940381 | 1005 | channel_stop_listening(); |
2e73a022 | 1006 | |
c6940381 | 1007 | snprintf(string, sizeof string, |
1008 | "%c& [backgrounded]\n", escape_char); | |
1009 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1010 | |
1011 | /* Fork into background. */ | |
1012 | pid = fork(); | |
1013 | if (pid < 0) { | |
1014 | error("fork: %.100s", strerror(errno)); | |
1015 | continue; | |
1016 | } | |
1017 | if (pid != 0) { /* This is the parent. */ | |
1018 | /* The parent just exits. */ | |
1019 | exit(0); | |
1020 | } | |
1021 | /* The child continues serving connections. */ | |
c6940381 | 1022 | if (compat20) { |
1023 | buffer_append(bin, "\004", 1); | |
1024 | /* fake EOF on stdin */ | |
1025 | return -1; | |
1026 | } else if (!stdin_eof) { | |
1027 | /* | |
344f1d3d | 1028 | * Sending SSH_CMSG_EOF alone does not |
1029 | * always appear to be enough. So we | |
1030 | * try to send an EOF character first. | |
c6940381 | 1031 | */ |
1032 | packet_start(SSH_CMSG_STDIN_DATA); | |
1033 | packet_put_string("\004", 1); | |
1034 | packet_send(); | |
1035 | /* Close stdin. */ | |
1036 | stdin_eof = 1; | |
1037 | if (buffer_len(bin) == 0) { | |
1038 | packet_start(SSH_CMSG_EOF); | |
1039 | packet_send(); | |
1040 | } | |
1041 | } | |
1042 | continue; | |
2e73a022 | 1043 | |
1044 | case '?': | |
f17f705b | 1045 | if (c && c->ctl_fd != -1) { |
1046 | snprintf(string, sizeof string, | |
1047 | "%c?\r\n\ | |
1048 | Supported escape sequences:\r\n\ | |
1049 | %c. - terminate session\r\n\ | |
1050 | %cB - send a BREAK to the remote system\r\n\ | |
f17f705b | 1051 | %cR - Request rekey (SSH protocol 2 only)\r\n\ |
1052 | %c# - list forwarded connections\r\n\ | |
1053 | %c? - this message\r\n\ | |
1054 | %c%c - send the escape character by typing it twice\r\n\ | |
1055 | (Note that escapes are only recognized immediately after newline.)\r\n", | |
1056 | escape_char, escape_char, | |
1057 | escape_char, escape_char, | |
1058 | escape_char, escape_char, | |
09925c00 | 1059 | escape_char, escape_char); |
f17f705b | 1060 | } else { |
1061 | snprintf(string, sizeof string, | |
2e73a022 | 1062 | "%c?\r\n\ |
1063 | Supported escape sequences:\r\n\ | |
f17f705b | 1064 | %c. - terminate connection (and any multiplexed sessions)\r\n\ |
1065 | %cB - send a BREAK to the remote system\r\n\ | |
1066 | %cC - open a command line\r\n\ | |
1067 | %cR - Request rekey (SSH protocol 2 only)\r\n\ | |
1068 | %c^Z - suspend ssh\r\n\ | |
1069 | %c# - list forwarded connections\r\n\ | |
1070 | %c& - background ssh (when waiting for connections to terminate)\r\n\ | |
1071 | %c? - this message\r\n\ | |
1072 | %c%c - send the escape character by typing it twice\r\n\ | |
2e73a022 | 1073 | (Note that escapes are only recognized immediately after newline.)\r\n", |
f17f705b | 1074 | escape_char, escape_char, |
1075 | escape_char, escape_char, | |
1076 | escape_char, escape_char, | |
1077 | escape_char, escape_char, | |
1078 | escape_char, escape_char, | |
1079 | escape_char); | |
1080 | } | |
2e73a022 | 1081 | buffer_append(berr, string, strlen(string)); |
1082 | continue; | |
1083 | ||
1084 | case '#': | |
f17f705b | 1085 | snprintf(string, sizeof string, "%c#\r\n", |
1086 | escape_char); | |
2e73a022 | 1087 | buffer_append(berr, string, strlen(string)); |
1088 | s = channel_open_message(); | |
1089 | buffer_append(berr, s, strlen(s)); | |
1090 | xfree(s); | |
1091 | continue; | |
1092 | ||
c53c54c2 | 1093 | case 'C': |
09925c00 | 1094 | if (c && c->ctl_fd != -1) |
1095 | goto noescape; | |
ec9b7086 | 1096 | process_cmdline(); |
c53c54c2 | 1097 | continue; |
1098 | ||
2e73a022 | 1099 | default: |
1100 | if (ch != escape_char) { | |
1101 | buffer_put_char(bin, escape_char); | |
1102 | bytes++; | |
1103 | } | |
1104 | /* Escaped characters fall through here */ | |
1105 | break; | |
1106 | } | |
1107 | } else { | |
1108 | /* | |
344f1d3d | 1109 | * The previous character was not an escape char. |
1110 | * Check if this is an escape. | |
2e73a022 | 1111 | */ |
1112 | if (last_was_cr && ch == escape_char) { | |
344f1d3d | 1113 | /* |
1114 | * It is. Set the flag and continue to | |
1115 | * next character. | |
1116 | */ | |
f17f705b | 1117 | *escape_pendingp = 1; |
2e73a022 | 1118 | continue; |
1119 | } | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Normal character. Record whether it was a newline, | |
1124 | * and append it to the buffer. | |
1125 | */ | |
1126 | last_was_cr = (ch == '\r' || ch == '\n'); | |
1127 | buffer_put_char(bin, ch); | |
1128 | bytes++; | |
1129 | } | |
1130 | return bytes; | |
1131 | } | |
1132 | ||
396c147e | 1133 | static void |
b476adfa | 1134 | client_process_input(fd_set *readset) |
8ce64345 | 1135 | { |
9da5c3c9 | 1136 | int len; |
e7ac4a90 | 1137 | char buf[SSH_IOBUFSZ]; |
8ce64345 | 1138 | |
5260325f | 1139 | /* Read input from stdin. */ |
1140 | if (FD_ISSET(fileno(stdin), readset)) { | |
1141 | /* Read as much as possible. */ | |
1142 | len = read(fileno(stdin), buf, sizeof(buf)); | |
5a0c8771 | 1143 | if (len < 0 && |
1144 | (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK)) | |
cf6bc93c | 1145 | return; /* we'll try again later */ |
5260325f | 1146 | if (len <= 0) { |
aa3378df | 1147 | /* |
1148 | * Received EOF or error. They are treated | |
1149 | * similarly, except that an error message is printed | |
1150 | * if it was an error condition. | |
1151 | */ | |
5260325f | 1152 | if (len < 0) { |
344f1d3d | 1153 | snprintf(buf, sizeof buf, "read: %.100s\r\n", |
1154 | strerror(errno)); | |
5260325f | 1155 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
5260325f | 1156 | } |
1157 | /* Mark that we have seen EOF. */ | |
1158 | stdin_eof = 1; | |
aa3378df | 1159 | /* |
1160 | * Send an EOF message to the server unless there is | |
1161 | * data in the buffer. If there is data in the | |
1162 | * buffer, no message will be sent now. Code | |
1163 | * elsewhere will send the EOF when the buffer | |
1164 | * becomes empty if stdin_eof is set. | |
1165 | */ | |
5260325f | 1166 | if (buffer_len(&stdin_buffer) == 0) { |
8efc0c15 | 1167 | packet_start(SSH_CMSG_EOF); |
1168 | packet_send(); | |
5260325f | 1169 | } |
f17f705b | 1170 | } else if (escape_char1 == SSH_ESCAPECHAR_NONE) { |
aa3378df | 1171 | /* |
1172 | * Normal successful read, and no escape character. | |
1173 | * Just append the data to buffer. | |
1174 | */ | |
5260325f | 1175 | buffer_append(&stdin_buffer, buf, len); |
5260325f | 1176 | } else { |
aa3378df | 1177 | /* |
344f1d3d | 1178 | * Normal, successful read. But we have an escape |
1179 | * character and have to process the characters one | |
1180 | * by one. | |
aa3378df | 1181 | */ |
f17f705b | 1182 | if (process_escapes(NULL, &stdin_buffer, |
1183 | &stdout_buffer, &stderr_buffer, buf, len) == -1) | |
2e73a022 | 1184 | return; |
5260325f | 1185 | } |
1186 | } | |
8efc0c15 | 1187 | } |
1188 | ||
396c147e | 1189 | static void |
b476adfa | 1190 | client_process_output(fd_set *writeset) |
8efc0c15 | 1191 | { |
5260325f | 1192 | int len; |
1193 | char buf[100]; | |
1194 | ||
1195 | /* Write buffered output to stdout. */ | |
1196 | if (FD_ISSET(fileno(stdout), writeset)) { | |
1197 | /* Write as much data as possible. */ | |
1198 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1199 | buffer_len(&stdout_buffer)); |
5260325f | 1200 | if (len <= 0) { |
5a0c8771 | 1201 | if (errno == EINTR || errno == EAGAIN || |
1202 | errno == EWOULDBLOCK) | |
5260325f | 1203 | len = 0; |
1204 | else { | |
aa3378df | 1205 | /* |
1206 | * An error or EOF was encountered. Put an | |
1207 | * error message to stderr buffer. | |
1208 | */ | |
344f1d3d | 1209 | snprintf(buf, sizeof buf, |
1210 | "write stdout: %.50s\r\n", strerror(errno)); | |
5260325f | 1211 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
5260325f | 1212 | quit_pending = 1; |
1213 | return; | |
1214 | } | |
1215 | } | |
1216 | /* Consume printed data from the buffer. */ | |
1217 | buffer_consume(&stdout_buffer, len); | |
1218 | } | |
1219 | /* Write buffered output to stderr. */ | |
1220 | if (FD_ISSET(fileno(stderr), writeset)) { | |
1221 | /* Write as much data as possible. */ | |
1222 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1223 | buffer_len(&stderr_buffer)); |
5260325f | 1224 | if (len <= 0) { |
5a0c8771 | 1225 | if (errno == EINTR || errno == EAGAIN || |
1226 | errno == EWOULDBLOCK) | |
5260325f | 1227 | len = 0; |
1228 | else { | |
344f1d3d | 1229 | /* |
1230 | * EOF or error, but can't even print | |
1231 | * error message. | |
1232 | */ | |
5260325f | 1233 | quit_pending = 1; |
1234 | return; | |
1235 | } | |
1236 | } | |
1237 | /* Consume printed characters from the buffer. */ | |
1238 | buffer_consume(&stderr_buffer, len); | |
8efc0c15 | 1239 | } |
8efc0c15 | 1240 | } |
1241 | ||
7368a6c8 | 1242 | /* |
1243 | * Get packets from the connection input buffer, and process them as long as | |
1244 | * there are packets available. | |
1245 | * | |
1246 | * Any unknown packets received during the actual | |
1247 | * session cause the session to terminate. This is | |
1248 | * intended to make debugging easier since no | |
1249 | * confirmations are sent. Any compatible protocol | |
1250 | * extensions must be negotiated during the | |
1251 | * preparatory phase. | |
1252 | */ | |
1253 | ||
396c147e | 1254 | static void |
5ca51e19 | 1255 | client_process_buffered_input_packets(void) |
7368a6c8 | 1256 | { |
344f1d3d | 1257 | dispatch_run(DISPATCH_NONBLOCK, &quit_pending, |
1258 | compat20 ? xxx_kex : NULL); | |
7368a6c8 | 1259 | } |
1260 | ||
2e73a022 | 1261 | /* scan buf[] for '~' before sending data to the peer */ |
1262 | ||
f17f705b | 1263 | /* Helper: allocate a new escape_filter_ctx and fill in its escape char */ |
1264 | void * | |
1265 | client_new_escape_filter_ctx(int escape_char) | |
1266 | { | |
1267 | struct escape_filter_ctx *ret; | |
1268 | ||
1269 | ret = xmalloc(sizeof(*ret)); | |
1270 | ret->escape_pending = 0; | |
1271 | ret->escape_char = escape_char; | |
1272 | return (void *)ret; | |
1273 | } | |
1274 | ||
e74caf1e | 1275 | /* Free the escape filter context on channel free */ |
1276 | void | |
1277 | client_filter_cleanup(int cid, void *ctx) | |
1278 | { | |
1279 | xfree(ctx); | |
1280 | } | |
1281 | ||
f17f705b | 1282 | int |
1283 | client_simple_escape_filter(Channel *c, char *buf, int len) | |
2e73a022 | 1284 | { |
95d3c124 | 1285 | if (c->extended_usage != CHAN_EXTENDED_WRITE) |
1286 | return 0; | |
1287 | ||
f17f705b | 1288 | return process_escapes(c, &c->input, &c->output, &c->extended, |
1289 | buf, len); | |
2e73a022 | 1290 | } |
1291 | ||
396c147e | 1292 | static void |
eb0dd41f | 1293 | client_channel_closed(int id, void *arg) |
1294 | { | |
418e724c | 1295 | channel_cancel_cleanup(id); |
eb0dd41f | 1296 | session_closed = 1; |
ccd01778 | 1297 | leave_raw_mode(force_tty_flag); |
eb0dd41f | 1298 | } |
1299 | ||
aa3378df | 1300 | /* |
1301 | * Implements the interactive session with the server. This is called after | |
1302 | * the user has been authenticated, and a command has been started on the | |
4bf9c10e | 1303 | * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character |
1304 | * used as an escape character for terminating or suspending the session. | |
aa3378df | 1305 | */ |
8efc0c15 | 1306 | |
6ae2364d | 1307 | int |
2e73a022 | 1308 | client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) |
8efc0c15 | 1309 | { |
39929cdb | 1310 | fd_set *readset = NULL, *writeset = NULL; |
5260325f | 1311 | double start_time, total_time; |
9a995072 | 1312 | int max_fd = 0, max_fd2 = 0, len, rekeying = 0; |
e8e08a80 | 1313 | u_int64_t ibytes, obytes; |
9a995072 | 1314 | u_int nalloc = 0; |
5260325f | 1315 | char buf[100]; |
1316 | ||
1317 | debug("Entering interactive session."); | |
1318 | ||
1319 | start_time = get_current_time(); | |
1320 | ||
1321 | /* Initialize variables. */ | |
f17f705b | 1322 | escape_pending1 = 0; |
5260325f | 1323 | last_was_cr = 1; |
1324 | exit_status = -1; | |
1325 | stdin_eof = 0; | |
1326 | buffer_high = 64 * 1024; | |
1327 | connection_in = packet_get_connection_in(); | |
1328 | connection_out = packet_get_connection_out(); | |
39929cdb | 1329 | max_fd = MAX(connection_in, connection_out); |
3bcced4c | 1330 | if (muxserver_sock != -1) |
1331 | max_fd = MAX(max_fd, muxserver_sock); | |
39929cdb | 1332 | |
1333 | if (!compat20) { | |
e968270c | 1334 | /* enable nonblocking unless tty */ |
1335 | if (!isatty(fileno(stdin))) | |
1336 | set_nonblock(fileno(stdin)); | |
1337 | if (!isatty(fileno(stdout))) | |
1338 | set_nonblock(fileno(stdout)); | |
1339 | if (!isatty(fileno(stderr))) | |
1340 | set_nonblock(fileno(stderr)); | |
39929cdb | 1341 | max_fd = MAX(max_fd, fileno(stdin)); |
1342 | max_fd = MAX(max_fd, fileno(stdout)); | |
1343 | max_fd = MAX(max_fd, fileno(stderr)); | |
1344 | } | |
5260325f | 1345 | quit_pending = 0; |
f17f705b | 1346 | escape_char1 = escape_char_arg; |
5260325f | 1347 | |
1348 | /* Initialize buffers. */ | |
1349 | buffer_init(&stdin_buffer); | |
1350 | buffer_init(&stdout_buffer); | |
1351 | buffer_init(&stderr_buffer); | |
1352 | ||
7368a6c8 | 1353 | client_init_dispatch(); |
1354 | ||
3c93c917 | 1355 | /* |
1356 | * Set signal handlers, (e.g. to restore non-blocking mode) | |
1357 | * but don't overwrite SIG_IGN, matches behaviour from rsh(1) | |
1358 | */ | |
d3e5d1e9 | 1359 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
1360 | signal(SIGHUP, signal_handler); | |
3c93c917 | 1361 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
1362 | signal(SIGINT, signal_handler); | |
1363 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) | |
1364 | signal(SIGQUIT, signal_handler); | |
1365 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) | |
1366 | signal(SIGTERM, signal_handler); | |
2c9a4d41 | 1367 | signal(SIGWINCH, window_change_handler); |
5260325f | 1368 | |
5260325f | 1369 | if (have_pty) |
ccd01778 | 1370 | enter_raw_mode(force_tty_flag); |
5260325f | 1371 | |
1fc8ccdf | 1372 | if (compat20) { |
1373 | session_ident = ssh2_chan_id; | |
f17f705b | 1374 | if (escape_char_arg != SSH_ESCAPECHAR_NONE) |
1fc8ccdf | 1375 | channel_register_filter(session_ident, |
f17f705b | 1376 | client_simple_escape_filter, NULL, |
e74caf1e | 1377 | client_filter_cleanup, |
f17f705b | 1378 | client_new_escape_filter_ctx(escape_char_arg)); |
eb0dd41f | 1379 | if (session_ident != -1) |
1380 | channel_register_cleanup(session_ident, | |
8cd0437d | 1381 | client_channel_closed, 0); |
1fc8ccdf | 1382 | } else { |
1383 | /* Check if we should immediately send eof on stdin. */ | |
8ce64345 | 1384 | client_check_initial_eof_on_stdin(); |
1fc8ccdf | 1385 | } |
2e73a022 | 1386 | |
5260325f | 1387 | /* Main loop of the client for the interactive session mode. */ |
1388 | while (!quit_pending) { | |
5260325f | 1389 | |
aa3378df | 1390 | /* Process buffered packets sent by the server. */ |
5260325f | 1391 | client_process_buffered_input_packets(); |
1392 | ||
eb0dd41f | 1393 | if (compat20 && session_closed && !channel_still_open()) |
8ce64345 | 1394 | break; |
eb0dd41f | 1395 | |
1396 | rekeying = (xxx_kex != NULL && !xxx_kex->done); | |
8ce64345 | 1397 | |
c422989b | 1398 | if (rekeying) { |
1399 | debug("rekeying in progress"); | |
1400 | } else { | |
1401 | /* | |
1402 | * Make packets of buffered stdin data, and buffer | |
1403 | * them for sending to the server. | |
1404 | */ | |
1405 | if (!compat20) | |
1406 | client_make_packets_from_stdin_data(); | |
5260325f | 1407 | |
c422989b | 1408 | /* |
1409 | * Make packets from buffered channel data, and | |
1410 | * enqueue them for sending to the server. | |
1411 | */ | |
1412 | if (packet_not_very_much_data_to_write()) | |
1413 | channel_output_poll(); | |
5260325f | 1414 | |
c422989b | 1415 | /* |
1416 | * Check if the window size has changed, and buffer a | |
1417 | * message about it to the server if so. | |
1418 | */ | |
1419 | client_check_window_change(); | |
5260325f | 1420 | |
c422989b | 1421 | if (quit_pending) |
1422 | break; | |
1423 | } | |
aa3378df | 1424 | /* |
1425 | * Wait until we have something to do (something becomes | |
1426 | * available on one of the descriptors). | |
1427 | */ | |
489aa2e9 | 1428 | max_fd2 = max_fd; |
c422989b | 1429 | client_wait_until_can_do_something(&readset, &writeset, |
489aa2e9 | 1430 | &max_fd2, &nalloc, rekeying); |
5260325f | 1431 | |
1432 | if (quit_pending) | |
1433 | break; | |
1434 | ||
c422989b | 1435 | /* Do channel operations unless rekeying in progress. */ |
1436 | if (!rekeying) { | |
1437 | channel_after_select(readset, writeset); | |
ffd7b36b | 1438 | if (need_rekeying || packet_need_rekeying()) { |
1439 | debug("need rekeying"); | |
c422989b | 1440 | xxx_kex->done = 0; |
1441 | kex_send_kexinit(xxx_kex); | |
1442 | need_rekeying = 0; | |
1443 | } | |
1444 | } | |
5260325f | 1445 | |
8ce64345 | 1446 | /* Buffer input from the connection. */ |
39929cdb | 1447 | client_process_net_input(readset); |
5260325f | 1448 | |
5e96b616 | 1449 | /* Accept control connections. */ |
3bcced4c | 1450 | if (muxserver_sock != -1 &&FD_ISSET(muxserver_sock, readset)) { |
1451 | if (muxserver_accept_control()) | |
1452 | quit_pending = 1; | |
1453 | } | |
5e96b616 | 1454 | |
8ce64345 | 1455 | if (quit_pending) |
1456 | break; | |
1457 | ||
1458 | if (!compat20) { | |
1459 | /* Buffer data from stdin */ | |
39929cdb | 1460 | client_process_input(readset); |
8ce64345 | 1461 | /* |
1462 | * Process output to stdout and stderr. Output to | |
1463 | * the connection is processed elsewhere (above). | |
1464 | */ | |
39929cdb | 1465 | client_process_output(writeset); |
8ce64345 | 1466 | } |
5260325f | 1467 | |
bb466eca | 1468 | if (session_resumed) { |
1469 | connection_in = packet_get_connection_in(); | |
1470 | connection_out = packet_get_connection_out(); | |
1471 | max_fd = MAX(max_fd, connection_out); | |
1472 | max_fd = MAX(max_fd, connection_in); | |
1473 | session_resumed = 0; | |
1474 | } | |
1475 | ||
344f1d3d | 1476 | /* |
1477 | * Send as much buffered packet data as possible to the | |
1478 | * sender. | |
1479 | */ | |
39929cdb | 1480 | if (FD_ISSET(connection_out, writeset)) |
5260325f | 1481 | packet_write_poll(); |
1482 | } | |
39929cdb | 1483 | if (readset) |
1484 | xfree(readset); | |
1485 | if (writeset) | |
1486 | xfree(writeset); | |
5260325f | 1487 | |
1488 | /* Terminate the session. */ | |
1489 | ||
1490 | /* Stop watching for window change. */ | |
2c9a4d41 | 1491 | signal(SIGWINCH, SIG_DFL); |
5260325f | 1492 | |
dc11a83a | 1493 | if (compat20) { |
1494 | packet_start(SSH2_MSG_DISCONNECT); | |
1495 | packet_put_int(SSH2_DISCONNECT_BY_APPLICATION); | |
1496 | packet_put_cstring("disconnected by user"); | |
1497 | packet_send(); | |
1498 | packet_write_wait(); | |
1499 | } | |
abdc5018 | 1500 | |
d6746a0b | 1501 | channel_free_all(); |
5260325f | 1502 | |
c9130033 | 1503 | if (have_pty) |
ccd01778 | 1504 | leave_raw_mode(force_tty_flag); |
89aa792b | 1505 | |
1506 | /* restore blocking io */ | |
1507 | if (!isatty(fileno(stdin))) | |
1508 | unset_nonblock(fileno(stdin)); | |
1509 | if (!isatty(fileno(stdout))) | |
1510 | unset_nonblock(fileno(stdout)); | |
1511 | if (!isatty(fileno(stderr))) | |
1512 | unset_nonblock(fileno(stderr)); | |
1513 | ||
66357af5 | 1514 | /* |
1515 | * If there was no shell or command requested, there will be no remote | |
1516 | * exit status to be returned. In that case, clear error code if the | |
1517 | * connection was deliberately terminated at this end. | |
1518 | */ | |
1519 | if (no_shell_flag && received_signal == SIGTERM) { | |
1520 | received_signal = 0; | |
1521 | exit_status = 0; | |
1522 | } | |
1523 | ||
82de775c | 1524 | if (received_signal) |
010f9726 | 1525 | fatal("Killed by signal %d.", (int) received_signal); |
c9130033 | 1526 | |
1527 | /* | |
1528 | * In interactive mode (with pseudo tty) display a message indicating | |
1529 | * that the connection has been closed. | |
1530 | */ | |
1531 | if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { | |
344f1d3d | 1532 | snprintf(buf, sizeof buf, |
1533 | "Connection to %.64s closed.\r\n", host); | |
c9130033 | 1534 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
1535 | } | |
1536 | ||
5260325f | 1537 | /* Output any buffered data for stdout. */ |
89aa792b | 1538 | while (buffer_len(&stdout_buffer) > 0) { |
1539 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1540 | buffer_len(&stdout_buffer)); |
89aa792b | 1541 | if (len <= 0) { |
5260325f | 1542 | error("Write failed flushing stdout buffer."); |
89aa792b | 1543 | break; |
1544 | } | |
5260325f | 1545 | buffer_consume(&stdout_buffer, len); |
8efc0c15 | 1546 | } |
5260325f | 1547 | |
1548 | /* Output any buffered data for stderr. */ | |
89aa792b | 1549 | while (buffer_len(&stderr_buffer) > 0) { |
1550 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1551 | buffer_len(&stderr_buffer)); |
89aa792b | 1552 | if (len <= 0) { |
5260325f | 1553 | error("Write failed flushing stderr buffer."); |
89aa792b | 1554 | break; |
1555 | } | |
5260325f | 1556 | buffer_consume(&stderr_buffer, len); |
1557 | } | |
1558 | ||
5260325f | 1559 | /* Clear and free any buffers. */ |
1560 | memset(buf, 0, sizeof(buf)); | |
1561 | buffer_free(&stdin_buffer); | |
1562 | buffer_free(&stdout_buffer); | |
1563 | buffer_free(&stderr_buffer); | |
1564 | ||
1565 | /* Report bytes transferred, and transfer rates. */ | |
1566 | total_time = get_current_time() - start_time; | |
e8e08a80 | 1567 | packet_get_state(MODE_IN, NULL, NULL, NULL, &ibytes); |
1568 | packet_get_state(MODE_OUT, NULL, NULL, NULL, &obytes); | |
1569 | verbose("Transferred: sent %llu, received %llu bytes, in %.1f seconds", | |
1570 | obytes, ibytes, total_time); | |
5260325f | 1571 | if (total_time > 0) |
e8e08a80 | 1572 | verbose("Bytes per second: sent %.1f, received %.1f", |
1573 | obytes / total_time, ibytes / total_time); | |
5260325f | 1574 | /* Return the exit status of the program. */ |
1575 | debug("Exit status %d", exit_status); | |
1576 | return exit_status; | |
8efc0c15 | 1577 | } |
7368a6c8 | 1578 | |
1579 | /*********/ | |
1580 | ||
396c147e | 1581 | static void |
7819b5c3 | 1582 | client_input_stdout_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1583 | { |
1e3b8b07 | 1584 | u_int data_len; |
7368a6c8 | 1585 | char *data = packet_get_string(&data_len); |
95500969 | 1586 | packet_check_eom(); |
7368a6c8 | 1587 | buffer_append(&stdout_buffer, data, data_len); |
7368a6c8 | 1588 | memset(data, 0, data_len); |
1589 | xfree(data); | |
1590 | } | |
396c147e | 1591 | static void |
7819b5c3 | 1592 | client_input_stderr_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1593 | { |
1e3b8b07 | 1594 | u_int data_len; |
7368a6c8 | 1595 | char *data = packet_get_string(&data_len); |
95500969 | 1596 | packet_check_eom(); |
7368a6c8 | 1597 | buffer_append(&stderr_buffer, data, data_len); |
7368a6c8 | 1598 | memset(data, 0, data_len); |
1599 | xfree(data); | |
1600 | } | |
396c147e | 1601 | static void |
7819b5c3 | 1602 | client_input_exit_status(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1603 | { |
7368a6c8 | 1604 | exit_status = packet_get_int(); |
95500969 | 1605 | packet_check_eom(); |
7368a6c8 | 1606 | /* Acknowledge the exit. */ |
1607 | packet_start(SSH_CMSG_EXIT_CONFIRMATION); | |
1608 | packet_send(); | |
1609 | /* | |
1610 | * Must wait for packet to be sent since we are | |
1611 | * exiting the loop. | |
1612 | */ | |
1613 | packet_write_wait(); | |
1614 | /* Flag that we want to exit. */ | |
1615 | quit_pending = 1; | |
1616 | } | |
c15706e2 | 1617 | static void |
1618 | client_input_agent_open(int type, u_int32_t seq, void *ctxt) | |
1619 | { | |
1620 | Channel *c = NULL; | |
1621 | int remote_id, sock; | |
1622 | ||
1623 | /* Read the remote channel number from the message. */ | |
1624 | remote_id = packet_get_int(); | |
1625 | packet_check_eom(); | |
1626 | ||
1627 | /* | |
1628 | * Get a connection to the local authentication agent (this may again | |
1629 | * get forwarded). | |
1630 | */ | |
1631 | sock = ssh_get_authentication_socket(); | |
1632 | ||
1633 | /* | |
1634 | * If we could not connect the agent, send an error message back to | |
1635 | * the server. This should never happen unless the agent dies, | |
1636 | * because authentication forwarding is only enabled if we have an | |
1637 | * agent. | |
1638 | */ | |
1639 | if (sock >= 0) { | |
1640 | c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, | |
1641 | -1, 0, 0, 0, "authentication agent connection", 1); | |
1642 | c->remote_id = remote_id; | |
1643 | c->force_drain = 1; | |
1644 | } | |
1645 | if (c == NULL) { | |
1646 | packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); | |
1647 | packet_put_int(remote_id); | |
1648 | } else { | |
1649 | /* Send a confirmation to the remote host. */ | |
1650 | debug("Forwarding authentication connection."); | |
1651 | packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1652 | packet_put_int(remote_id); | |
1653 | packet_put_int(c->self); | |
1654 | } | |
1655 | packet_send(); | |
1656 | } | |
7368a6c8 | 1657 | |
396c147e | 1658 | static Channel * |
fa08c86b | 1659 | client_request_forwarded_tcpip(const char *request_type, int rchan) |
1660 | { | |
343288b8 | 1661 | Channel *c = NULL; |
fa08c86b | 1662 | char *listen_address, *originator_address; |
5134115d | 1663 | u_short listen_port, originator_port; |
fa08c86b | 1664 | |
1665 | /* Get rest of the packet */ | |
1666 | listen_address = packet_get_string(NULL); | |
1667 | listen_port = packet_get_int(); | |
1668 | originator_address = packet_get_string(NULL); | |
1669 | originator_port = packet_get_int(); | |
95500969 | 1670 | packet_check_eom(); |
fa08c86b | 1671 | |
e07e21ad | 1672 | debug("client_request_forwarded_tcpip: listen %s port %d, " |
1673 | "originator %s port %d", listen_address, listen_port, | |
1674 | originator_address, originator_port); | |
1675 | ||
1676 | c = channel_connect_by_listen_address(listen_port, | |
1677 | "forwarded-tcpip", originator_address); | |
fa08c86b | 1678 | |
fa08c86b | 1679 | xfree(originator_address); |
1680 | xfree(listen_address); | |
1681 | return c; | |
1682 | } | |
1683 | ||
343288b8 | 1684 | static Channel * |
fa08c86b | 1685 | client_request_x11(const char *request_type, int rchan) |
1686 | { | |
1687 | Channel *c = NULL; | |
1688 | char *originator; | |
5134115d | 1689 | u_short originator_port; |
719fc62f | 1690 | int sock; |
fa08c86b | 1691 | |
1692 | if (!options.forward_x11) { | |
1693 | error("Warning: ssh server tried X11 forwarding."); | |
344f1d3d | 1694 | error("Warning: this is probably a break-in attempt by a " |
1695 | "malicious server."); | |
fa08c86b | 1696 | return NULL; |
1697 | } | |
1698 | originator = packet_get_string(NULL); | |
1699 | if (datafellows & SSH_BUG_X11FWD) { | |
1700 | debug2("buggy server: x11 request w/o originator_port"); | |
1701 | originator_port = 0; | |
1702 | } else { | |
1703 | originator_port = packet_get_int(); | |
1704 | } | |
95500969 | 1705 | packet_check_eom(); |
fa08c86b | 1706 | /* XXX check permission */ |
865ac82e | 1707 | debug("client_request_x11: request from %s %d", originator, |
1708 | originator_port); | |
719fc62f | 1709 | xfree(originator); |
fa08c86b | 1710 | sock = x11_connect_display(); |
719fc62f | 1711 | if (sock < 0) |
1712 | return NULL; | |
1713 | c = channel_new("x11", | |
1714 | SSH_CHANNEL_X11_OPEN, sock, sock, -1, | |
0d942eff | 1715 | CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); |
a5f82435 | 1716 | c->force_drain = 1; |
fa08c86b | 1717 | return c; |
1718 | } | |
1719 | ||
343288b8 | 1720 | static Channel * |
fa08c86b | 1721 | client_request_agent(const char *request_type, int rchan) |
1722 | { | |
1723 | Channel *c = NULL; | |
719fc62f | 1724 | int sock; |
fa08c86b | 1725 | |
1726 | if (!options.forward_agent) { | |
1727 | error("Warning: ssh server tried agent forwarding."); | |
344f1d3d | 1728 | error("Warning: this is probably a break-in attempt by a " |
1729 | "malicious server."); | |
fa08c86b | 1730 | return NULL; |
1731 | } | |
803c4226 | 1732 | sock = ssh_get_authentication_socket(); |
719fc62f | 1733 | if (sock < 0) |
1734 | return NULL; | |
1735 | c = channel_new("authentication agent connection", | |
1736 | SSH_CHANNEL_OPEN, sock, sock, -1, | |
016f1482 | 1737 | CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, |
0d942eff | 1738 | "authentication agent connection", 1); |
a5f82435 | 1739 | c->force_drain = 1; |
fa08c86b | 1740 | return c; |
1741 | } | |
1742 | ||
79303c5a | 1743 | int |
1744 | client_request_tun_fwd(int tun_mode, int local_tun, int remote_tun) | |
1745 | { | |
1746 | Channel *c; | |
1747 | int fd; | |
1748 | ||
1749 | if (tun_mode == SSH_TUNMODE_NO) | |
1750 | return 0; | |
1751 | ||
1752 | if (!compat20) { | |
6c20a13f | 1753 | error("Tunnel forwarding is not supported for protocol 1"); |
79303c5a | 1754 | return -1; |
1755 | } | |
1756 | ||
1757 | debug("Requesting tun unit %d in mode %d", local_tun, tun_mode); | |
1758 | ||
1759 | /* Open local tunnel device */ | |
1760 | if ((fd = tun_open(local_tun, tun_mode)) == -1) { | |
1761 | error("Tunnel device open failed."); | |
1762 | return -1; | |
1763 | } | |
1764 | ||
1765 | c = channel_new("tun", SSH_CHANNEL_OPENING, fd, fd, -1, | |
1766 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, "tun", 1); | |
1767 | c->datagram = 1; | |
1768 | ||
1769 | #if defined(SSH_TUN_FILTER) | |
1770 | if (options.tun_open == SSH_TUNMODE_POINTOPOINT) | |
1771 | channel_register_filter(c->self, sys_tun_infilter, | |
136d0181 | 1772 | sys_tun_outfilter, NULL, NULL); |
79303c5a | 1773 | #endif |
1774 | ||
1775 | packet_start(SSH2_MSG_CHANNEL_OPEN); | |
1776 | packet_put_cstring("tun@openssh.com"); | |
1777 | packet_put_int(c->self); | |
1778 | packet_put_int(c->local_window_max); | |
1779 | packet_put_int(c->local_maxpacket); | |
1780 | packet_put_int(tun_mode); | |
1781 | packet_put_int(remote_tun); | |
1782 | packet_send(); | |
1783 | ||
1784 | return 0; | |
1785 | } | |
1786 | ||
0b242b12 | 1787 | /* XXXX move to generic input handler */ |
396c147e | 1788 | static void |
7819b5c3 | 1789 | client_input_channel_open(int type, u_int32_t seq, void *ctxt) |
0b242b12 | 1790 | { |
1791 | Channel *c = NULL; | |
1792 | char *ctype; | |
0b242b12 | 1793 | int rchan; |
f91d9a89 | 1794 | u_int rmaxpack, rwindow, len; |
0b242b12 | 1795 | |
1796 | ctype = packet_get_string(&len); | |
1797 | rchan = packet_get_int(); | |
1798 | rwindow = packet_get_int(); | |
1799 | rmaxpack = packet_get_int(); | |
1800 | ||
1d1ffb87 | 1801 | debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
0b242b12 | 1802 | ctype, rchan, rwindow, rmaxpack); |
1803 | ||
fa08c86b | 1804 | if (strcmp(ctype, "forwarded-tcpip") == 0) { |
1805 | c = client_request_forwarded_tcpip(ctype, rchan); | |
1806 | } else if (strcmp(ctype, "x11") == 0) { | |
1807 | c = client_request_x11(ctype, rchan); | |
1808 | } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { | |
1809 | c = client_request_agent(ctype, rchan); | |
0b242b12 | 1810 | } |
1811 | /* XXX duplicate : */ | |
1812 | if (c != NULL) { | |
1813 | debug("confirm %s", ctype); | |
1814 | c->remote_id = rchan; | |
1815 | c->remote_window = rwindow; | |
1816 | c->remote_maxpacket = rmaxpack; | |
a01a10dd | 1817 | if (c->type != SSH_CHANNEL_CONNECTING) { |
1818 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1819 | packet_put_int(c->remote_id); | |
1820 | packet_put_int(c->self); | |
1821 | packet_put_int(c->local_window); | |
1822 | packet_put_int(c->local_maxpacket); | |
1823 | packet_send(); | |
1824 | } | |
0b242b12 | 1825 | } else { |
1826 | debug("failure %s", ctype); | |
1827 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); | |
1828 | packet_put_int(rchan); | |
1829 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 1830 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
a01a10dd | 1831 | packet_put_cstring("open failed"); |
fbe90f7b | 1832 | packet_put_cstring(""); |
1833 | } | |
0b242b12 | 1834 | packet_send(); |
1835 | } | |
1836 | xfree(ctype); | |
1837 | } | |
396c147e | 1838 | static void |
7819b5c3 | 1839 | client_input_channel_req(int type, u_int32_t seq, void *ctxt) |
1fc8ccdf | 1840 | { |
1841 | Channel *c = NULL; | |
5e96b616 | 1842 | int exitval, id, reply, success = 0; |
1fc8ccdf | 1843 | char *rtype; |
1844 | ||
1845 | id = packet_get_int(); | |
1846 | rtype = packet_get_string(NULL); | |
1847 | reply = packet_get_char(); | |
1848 | ||
1849 | debug("client_input_channel_req: channel %d rtype %s reply %d", | |
1850 | id, rtype, reply); | |
1851 | ||
13de3560 | 1852 | if (id == -1) { |
1853 | error("client_input_channel_req: request for channel -1"); | |
1854 | } else if ((c = channel_lookup(id)) == NULL) { | |
344f1d3d | 1855 | error("client_input_channel_req: channel %d: " |
1856 | "unknown channel", id); | |
50c96367 | 1857 | } else if (strcmp(rtype, "eow@openssh.com") == 0) { |
1858 | packet_check_eom(); | |
1859 | chan_rcvd_eow(c); | |
1fc8ccdf | 1860 | } else if (strcmp(rtype, "exit-status") == 0) { |
5e96b616 | 1861 | exitval = packet_get_int(); |
851d192b | 1862 | if (c->ctl_fd != -1) { |
1863 | /* Dispatch to mux client */ | |
1864 | atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval)); | |
1865 | success = 1; | |
1866 | } else if (id == session_ident) { | |
1867 | /* Record exit value of local session */ | |
5e96b616 | 1868 | success = 1; |
1869 | exit_status = exitval; | |
851d192b | 1870 | } else { |
5e96b616 | 1871 | error("client_input_channel_req: unexpected channel %d", |
1872 | session_ident); | |
5e96b616 | 1873 | } |
95500969 | 1874 | packet_check_eom(); |
1fc8ccdf | 1875 | } |
1876 | if (reply) { | |
1877 | packet_start(success ? | |
1878 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
66e16767 | 1879 | packet_put_int(c->remote_id); |
1fc8ccdf | 1880 | packet_send(); |
1881 | } | |
1882 | xfree(rtype); | |
1883 | } | |
3d209bbe | 1884 | static void |
1885 | client_input_global_request(int type, u_int32_t seq, void *ctxt) | |
1886 | { | |
1887 | char *rtype; | |
1888 | int want_reply; | |
1889 | int success = 0; | |
1890 | ||
1891 | rtype = packet_get_string(NULL); | |
1892 | want_reply = packet_get_char(); | |
5d8d32a3 | 1893 | debug("client_input_global_request: rtype %s want_reply %d", |
1894 | rtype, want_reply); | |
3d209bbe | 1895 | if (want_reply) { |
1896 | packet_start(success ? | |
1897 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
1898 | packet_send(); | |
1899 | packet_write_wait(); | |
1900 | } | |
1901 | xfree(rtype); | |
1902 | } | |
0b242b12 | 1903 | |
5e96b616 | 1904 | void |
f2107e97 | 1905 | client_session2_setup(int id, int want_tty, int want_subsystem, |
95d3c124 | 1906 | const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env) |
5e96b616 | 1907 | { |
1908 | int len; | |
2c9a4d41 | 1909 | Channel *c = NULL; |
5e96b616 | 1910 | |
1911 | debug2("%s: id %d", __func__, id); | |
1912 | ||
2c9a4d41 | 1913 | if ((c = channel_lookup(id)) == NULL) |
1914 | fatal("client_session2_setup: channel %d: unknown channel", id); | |
1915 | ||
5e96b616 | 1916 | if (want_tty) { |
1917 | struct winsize ws; | |
5e96b616 | 1918 | |
1919 | /* Store window size in the packet. */ | |
1920 | if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) | |
1921 | memset(&ws, 0, sizeof(ws)); | |
1922 | ||
95d3c124 | 1923 | channel_request_start(id, "pty-req", 1); |
1924 | client_expect_confirm(id, "PTY allocation", 0); | |
5e96b616 | 1925 | packet_put_cstring(term != NULL ? term : ""); |
148de80c | 1926 | packet_put_int((u_int)ws.ws_col); |
1927 | packet_put_int((u_int)ws.ws_row); | |
1928 | packet_put_int((u_int)ws.ws_xpixel); | |
1929 | packet_put_int((u_int)ws.ws_ypixel); | |
4651c790 | 1930 | if (tiop == NULL) |
1931 | tiop = get_saved_tio(); | |
1932 | tty_make_modes(-1, tiop); | |
5e96b616 | 1933 | packet_send(); |
1934 | /* XXX wait for reply */ | |
2c9a4d41 | 1935 | c->client_tty = 1; |
5e96b616 | 1936 | } |
1937 | ||
1938 | /* Transfer any environment variables from client to server */ | |
1786be35 | 1939 | if (options.num_send_env != 0 && env != NULL) { |
5e96b616 | 1940 | int i, j, matched; |
5e96b616 | 1941 | char *name, *val; |
1942 | ||
1943 | debug("Sending environment."); | |
1786be35 | 1944 | for (i = 0; env[i] != NULL; i++) { |
5e96b616 | 1945 | /* Split */ |
1786be35 | 1946 | name = xstrdup(env[i]); |
5e96b616 | 1947 | if ((val = strchr(name, '=')) == NULL) { |
8c4bd764 | 1948 | xfree(name); |
5e96b616 | 1949 | continue; |
1950 | } | |
1951 | *val++ = '\0'; | |
1952 | ||
1953 | matched = 0; | |
1954 | for (j = 0; j < options.num_send_env; j++) { | |
1955 | if (match_pattern(name, options.send_env[j])) { | |
1956 | matched = 1; | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | if (!matched) { | |
1961 | debug3("Ignored env %s", name); | |
8c4bd764 | 1962 | xfree(name); |
5e96b616 | 1963 | continue; |
1964 | } | |
1965 | ||
1966 | debug("Sending env %s = %s", name, val); | |
1967 | channel_request_start(id, "env", 0); | |
1968 | packet_put_cstring(name); | |
1969 | packet_put_cstring(val); | |
1970 | packet_send(); | |
8c4bd764 | 1971 | xfree(name); |
5e96b616 | 1972 | } |
1973 | } | |
1974 | ||
1975 | len = buffer_len(cmd); | |
1976 | if (len > 0) { | |
1977 | if (len > 900) | |
1978 | len = 900; | |
1979 | if (want_subsystem) { | |
95d3c124 | 1980 | debug("Sending subsystem: %.*s", |
1981 | len, (u_char*)buffer_ptr(cmd)); | |
1982 | channel_request_start(id, "subsystem", 1); | |
1983 | client_expect_confirm(id, "subsystem", 1); | |
5e96b616 | 1984 | } else { |
95d3c124 | 1985 | debug("Sending command: %.*s", |
1986 | len, (u_char*)buffer_ptr(cmd)); | |
1987 | channel_request_start(id, "exec", 1); | |
1988 | client_expect_confirm(id, "exec", 1); | |
5e96b616 | 1989 | } |
1990 | packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); | |
1991 | packet_send(); | |
1992 | } else { | |
95d3c124 | 1993 | channel_request_start(id, "shell", 1); |
1994 | client_expect_confirm(id, "shell", 1); | |
5e96b616 | 1995 | packet_send(); |
1996 | } | |
1997 | } | |
1998 | ||
396c147e | 1999 | static void |
5ca51e19 | 2000 | client_init_dispatch_20(void) |
8ce64345 | 2001 | { |
7a37c112 | 2002 | dispatch_init(&dispatch_protocol_error); |
e0ae8728 | 2003 | |
8ce64345 | 2004 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
2005 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
2006 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
2007 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
0b242b12 | 2008 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
8ce64345 | 2009 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
2010 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1fc8ccdf | 2011 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
8ce64345 | 2012 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
3593bdc0 | 2013 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, &channel_input_status_confirm); |
2014 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, &channel_input_status_confirm); | |
3d209bbe | 2015 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); |
7a37c112 | 2016 | |
2017 | /* rekeying */ | |
2018 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e0ae8728 | 2019 | |
2020 | /* global request reply messages */ | |
2021 | dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); | |
2022 | dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); | |
8ce64345 | 2023 | } |
344f1d3d | 2024 | |
396c147e | 2025 | static void |
5ca51e19 | 2026 | client_init_dispatch_13(void) |
7368a6c8 | 2027 | { |
2028 | dispatch_init(NULL); | |
2029 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
2030 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
2031 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
7368a6c8 | 2032 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
2033 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
2034 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
7368a6c8 | 2035 | dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
2036 | dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); | |
2037 | dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); | |
a22aff1f | 2038 | |
2039 | dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? | |
c15706e2 | 2040 | &client_input_agent_open : &deny_input_open); |
a22aff1f | 2041 | dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
2042 | &x11_input_open : &deny_input_open); | |
7368a6c8 | 2043 | } |
344f1d3d | 2044 | |
396c147e | 2045 | static void |
5ca51e19 | 2046 | client_init_dispatch_15(void) |
7368a6c8 | 2047 | { |
2048 | client_init_dispatch_13(); | |
2049 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
2050 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); | |
2051 | } | |
344f1d3d | 2052 | |
eea46d13 | 2053 | static void |
5ca51e19 | 2054 | client_init_dispatch(void) |
7368a6c8 | 2055 | { |
8ce64345 | 2056 | if (compat20) |
2057 | client_init_dispatch_20(); | |
2058 | else if (compat13) | |
7368a6c8 | 2059 | client_init_dispatch_13(); |
2060 | else | |
2061 | client_init_dispatch_15(); | |
2062 | } | |
82de775c | 2063 | |
2064 | /* client specific fatal cleanup */ | |
2065 | void | |
2362db19 | 2066 | cleanup_exit(int i) |
82de775c | 2067 | { |
ccd01778 | 2068 | leave_raw_mode(force_tty_flag); |
82de775c | 2069 | leave_non_blocking(); |
3bcced4c | 2070 | if (options.control_path != NULL && muxserver_sock != -1) |
5e96b616 | 2071 | unlink(options.control_path); |
2362db19 | 2072 | _exit(i); |
82de775c | 2073 | } |