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5b04a8bf | 1 | /* $OpenBSD: clientloop.c,v 1.166 2006/07/08 21:47:12 stevesk 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> |
65 | #ifdef HAVE_SYS_STAT_H | |
66 | # include <sys/stat.h> | |
67 | #endif | |
5b04a8bf | 68 | #include <sys/socket.h> |
bd7c69ea | 69 | #include <sys/ioctl.h> |
1d3e026f | 70 | |
b6438382 | 71 | #include <ctype.h> |
b5b88c19 | 72 | #ifdef HAVE_PATHS_H |
a75f5360 | 73 | #include <paths.h> |
b5b88c19 | 74 | #endif |
ada68823 | 75 | #include <signal.h> |
1d3e026f | 76 | #include <termios.h> |
8efc0c15 | 77 | |
8efc0c15 | 78 | #include "ssh.h" |
42f11eb2 | 79 | #include "ssh1.h" |
80 | #include "ssh2.h" | |
81 | #include "xmalloc.h" | |
8efc0c15 | 82 | #include "packet.h" |
83 | #include "buffer.h" | |
7368a6c8 | 84 | #include "compat.h" |
a5efa1bb | 85 | #include "channels.h" |
7368a6c8 | 86 | #include "dispatch.h" |
2e73a022 | 87 | #include "buffer.h" |
88 | #include "bufaux.h" | |
fa08c86b | 89 | #include "key.h" |
e092ce67 | 90 | #include "kex.h" |
42f11eb2 | 91 | #include "log.h" |
92 | #include "readconf.h" | |
b5c334cc | 93 | #include "clientloop.h" |
ceec33f3 | 94 | #include "sshconnect.h" |
42f11eb2 | 95 | #include "authfd.h" |
96 | #include "atomicio.h" | |
07d80252 | 97 | #include "sshpty.h" |
e968270c | 98 | #include "misc.h" |
5e96b616 | 99 | #include "monitor_fdpass.h" |
100 | #include "match.h" | |
101 | #include "msg.h" | |
a22aff1f | 102 | |
103 | /* import options */ | |
104 | extern Options options; | |
105 | ||
8efc0c15 | 106 | /* Flag indicating that stdin should be redirected from /dev/null. */ |
107 | extern int stdin_null_flag; | |
108 | ||
66357af5 | 109 | /* Flag indicating that no shell has been requested */ |
110 | extern int no_shell_flag; | |
111 | ||
5e96b616 | 112 | /* Control socket */ |
113 | extern int control_fd; | |
114 | ||
aa3378df | 115 | /* |
116 | * Name of the host we are connecting to. This is the name given on the | |
117 | * command line, or the HostName specified for the user-supplied name in a | |
118 | * configuration file. | |
119 | */ | |
8efc0c15 | 120 | extern char *host; |
121 | ||
aa3378df | 122 | /* |
123 | * Flag to indicate that we have received a window change signal which has | |
124 | * not yet been processed. This will cause a message indicating the new | |
125 | * window size to be sent to the server a little later. This is volatile | |
126 | * because this is updated in a signal handler. | |
127 | */ | |
7a934d1b | 128 | static volatile sig_atomic_t received_window_change_signal = 0; |
129 | static volatile sig_atomic_t received_signal = 0; | |
8efc0c15 | 130 | |
7b9b0103 | 131 | /* Flag indicating whether the user's terminal is in non-blocking mode. */ |
8efc0c15 | 132 | static int in_non_blocking_mode = 0; |
133 | ||
134 | /* Common data for the client loop code. */ | |
50394f26 | 135 | static volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */ |
2e73a022 | 136 | static int escape_char; /* Escape character. */ |
5260325f | 137 | static int escape_pending; /* Last character was the escape character */ |
138 | static int last_was_cr; /* Last character was a newline. */ | |
139 | static int exit_status; /* Used to store the exit status of the command. */ | |
140 | static int stdin_eof; /* EOF has been encountered on standard error. */ | |
141 | static Buffer stdin_buffer; /* Buffer for stdin data. */ | |
142 | static Buffer stdout_buffer; /* Buffer for stdout data. */ | |
143 | static Buffer stderr_buffer; /* Buffer for stderr data. */ | |
1e3b8b07 | 144 | static u_long stdin_bytes, stdout_bytes, stderr_bytes; |
145 | static u_int buffer_high;/* Soft max buffer size. */ | |
5260325f | 146 | static int connection_in; /* Connection to server (input). */ |
147 | static int connection_out; /* Connection to server (output). */ | |
c422989b | 148 | static int need_rekeying; /* Set to non-zero if rekeying is requested. */ |
eb0dd41f | 149 | static int session_closed = 0; /* In SSH2: login session closed. */ |
5d8d32a3 | 150 | static int server_alive_timeouts = 0; |
8efc0c15 | 151 | |
396c147e | 152 | static void client_init_dispatch(void); |
8ce64345 | 153 | int session_ident = -1; |
154 | ||
5e96b616 | 155 | struct confirm_ctx { |
156 | int want_tty; | |
157 | int want_subsys; | |
ef07103c | 158 | int want_x_fwd; |
159 | int want_agent_fwd; | |
5e96b616 | 160 | Buffer cmd; |
161 | char *term; | |
162 | struct termios tio; | |
1786be35 | 163 | char **env; |
5e96b616 | 164 | }; |
165 | ||
e092ce67 | 166 | /*XXX*/ |
167 | extern Kex *xxx_kex; | |
168 | ||
5e96b616 | 169 | void ssh_process_session2_setup(int, int, int, Buffer *); |
170 | ||
8efc0c15 | 171 | /* Restores stdin to blocking mode. */ |
172 | ||
396c147e | 173 | static void |
5ca51e19 | 174 | leave_non_blocking(void) |
8efc0c15 | 175 | { |
5260325f | 176 | if (in_non_blocking_mode) { |
1b273ece | 177 | unset_nonblock(fileno(stdin)); |
5260325f | 178 | in_non_blocking_mode = 0; |
5260325f | 179 | } |
8efc0c15 | 180 | } |
181 | ||
5260325f | 182 | /* Puts stdin terminal in non-blocking mode. */ |
183 | ||
396c147e | 184 | static void |
5ca51e19 | 185 | enter_non_blocking(void) |
8efc0c15 | 186 | { |
5260325f | 187 | in_non_blocking_mode = 1; |
170694d7 | 188 | set_nonblock(fileno(stdin)); |
8efc0c15 | 189 | } |
190 | ||
aa3378df | 191 | /* |
192 | * Signal handler for the window change signal (SIGWINCH). This just sets a | |
193 | * flag indicating that the window has changed. | |
194 | */ | |
3efa8ea9 | 195 | /*ARGSUSED */ |
396c147e | 196 | static void |
5260325f | 197 | window_change_handler(int sig) |
8efc0c15 | 198 | { |
5260325f | 199 | received_window_change_signal = 1; |
200 | signal(SIGWINCH, window_change_handler); | |
8efc0c15 | 201 | } |
202 | ||
aa3378df | 203 | /* |
204 | * Signal handler for signals that cause the program to terminate. These | |
205 | * signals must be trapped to restore terminal modes. | |
206 | */ | |
3efa8ea9 | 207 | /*ARGSUSED */ |
396c147e | 208 | static void |
5260325f | 209 | signal_handler(int sig) |
8efc0c15 | 210 | { |
c9130033 | 211 | received_signal = sig; |
212 | quit_pending = 1; | |
8efc0c15 | 213 | } |
214 | ||
aa3378df | 215 | /* |
216 | * Returns current time in seconds from Jan 1, 1970 with the maximum | |
217 | * available resolution. | |
218 | */ | |
8efc0c15 | 219 | |
396c147e | 220 | static double |
5ca51e19 | 221 | get_current_time(void) |
8efc0c15 | 222 | { |
5260325f | 223 | struct timeval tv; |
224 | gettimeofday(&tv, NULL); | |
225 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; | |
8efc0c15 | 226 | } |
227 | ||
9bf083eb | 228 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
229 | void | |
230 | client_x11_get_proto(const char *display, const char *xauth_path, | |
231 | u_int trusted, char **_proto, char **_data) | |
232 | { | |
233 | char cmd[1024]; | |
234 | char line[512]; | |
235 | char xdisplay[512]; | |
236 | static char proto[512], data[512]; | |
237 | FILE *f; | |
238 | int got_data = 0, generated = 0, do_unlink = 0, i; | |
239 | char *xauthdir, *xauthfile; | |
240 | struct stat st; | |
241 | ||
242 | xauthdir = xauthfile = NULL; | |
243 | *_proto = proto; | |
244 | *_data = data; | |
245 | proto[0] = data[0] = '\0'; | |
246 | ||
247 | if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { | |
248 | debug("No xauth program."); | |
249 | } else { | |
250 | if (display == NULL) { | |
251 | debug("x11_get_proto: DISPLAY not set"); | |
252 | return; | |
253 | } | |
254 | /* | |
255 | * Handle FamilyLocal case where $DISPLAY does | |
256 | * not match an authorization entry. For this we | |
257 | * just try "xauth list unix:displaynum.screennum". | |
258 | * XXX: "localhost" match to determine FamilyLocal | |
259 | * is not perfect. | |
260 | */ | |
261 | if (strncmp(display, "localhost:", 10) == 0) { | |
262 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", | |
263 | display + 10); | |
264 | display = xdisplay; | |
265 | } | |
266 | if (trusted == 0) { | |
267 | xauthdir = xmalloc(MAXPATHLEN); | |
268 | xauthfile = xmalloc(MAXPATHLEN); | |
269 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); | |
270 | if (mkdtemp(xauthdir) != NULL) { | |
271 | do_unlink = 1; | |
272 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", | |
273 | xauthdir); | |
274 | snprintf(cmd, sizeof(cmd), | |
275 | "%s -f %s generate %s " SSH_X11_PROTO | |
276 | " untrusted timeout 1200 2>" _PATH_DEVNULL, | |
277 | xauth_path, xauthfile, display); | |
278 | debug2("x11_get_proto: %s", cmd); | |
279 | if (system(cmd) == 0) | |
280 | generated = 1; | |
281 | } | |
282 | } | |
283 | snprintf(cmd, sizeof(cmd), | |
b5443199 | 284 | "%s %s%s list %s 2>" _PATH_DEVNULL, |
9bf083eb | 285 | xauth_path, |
286 | generated ? "-f " : "" , | |
287 | generated ? xauthfile : "", | |
288 | display); | |
289 | debug2("x11_get_proto: %s", cmd); | |
290 | f = popen(cmd, "r"); | |
291 | if (f && fgets(line, sizeof(line), f) && | |
292 | sscanf(line, "%*s %511s %511s", proto, data) == 2) | |
293 | got_data = 1; | |
294 | if (f) | |
295 | pclose(f); | |
296 | } | |
297 | ||
298 | if (do_unlink) { | |
299 | unlink(xauthfile); | |
300 | rmdir(xauthdir); | |
301 | } | |
302 | if (xauthdir) | |
303 | xfree(xauthdir); | |
304 | if (xauthfile) | |
305 | xfree(xauthfile); | |
306 | ||
307 | /* | |
308 | * If we didn't get authentication data, just make up some | |
309 | * data. The forwarding code will check the validity of the | |
310 | * response anyway, and substitute this data. The X11 | |
311 | * server, however, will ignore this fake data and use | |
312 | * whatever authentication mechanisms it was using otherwise | |
313 | * for the local connection. | |
314 | */ | |
315 | if (!got_data) { | |
316 | u_int32_t rnd = 0; | |
317 | ||
318 | logit("Warning: No xauth data; " | |
319 | "using fake authentication data for X11 forwarding."); | |
320 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); | |
321 | for (i = 0; i < 16; i++) { | |
322 | if (i % 4 == 0) | |
323 | rnd = arc4random(); | |
324 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", | |
325 | rnd & 0xff); | |
326 | rnd >>= 8; | |
327 | } | |
328 | } | |
329 | } | |
330 | ||
aa3378df | 331 | /* |
332 | * This is called when the interactive is entered. This checks if there is | |
333 | * an EOF coming on stdin. We must check this explicitly, as select() does | |
334 | * not appear to wake up when redirecting from /dev/null. | |
335 | */ | |
8efc0c15 | 336 | |
396c147e | 337 | static void |
5ca51e19 | 338 | client_check_initial_eof_on_stdin(void) |
8efc0c15 | 339 | { |
5260325f | 340 | int len; |
341 | char buf[1]; | |
342 | ||
aa3378df | 343 | /* |
344 | * If standard input is to be "redirected from /dev/null", we simply | |
345 | * mark that we have seen an EOF and send an EOF message to the | |
346 | * server. Otherwise, we try to read a single character; it appears | |
347 | * that for some files, such /dev/null, select() never wakes up for | |
348 | * read for this descriptor, which means that we never get EOF. This | |
349 | * way we will get the EOF if stdin comes from /dev/null or similar. | |
350 | */ | |
5260325f | 351 | if (stdin_null_flag) { |
352 | /* Fake EOF on stdin. */ | |
353 | debug("Sending eof."); | |
354 | stdin_eof = 1; | |
355 | packet_start(SSH_CMSG_EOF); | |
356 | packet_send(); | |
357 | } else { | |
5260325f | 358 | enter_non_blocking(); |
359 | ||
360 | /* Check for immediate EOF on stdin. */ | |
361 | len = read(fileno(stdin), buf, 1); | |
362 | if (len == 0) { | |
aa3378df | 363 | /* EOF. Record that we have seen it and send EOF to server. */ |
5260325f | 364 | debug("Sending eof."); |
365 | stdin_eof = 1; | |
366 | packet_start(SSH_CMSG_EOF); | |
367 | packet_send(); | |
368 | } else if (len > 0) { | |
aa3378df | 369 | /* |
370 | * Got data. We must store the data in the buffer, | |
371 | * and also process it as an escape character if | |
372 | * appropriate. | |
373 | */ | |
1e3b8b07 | 374 | if ((u_char) buf[0] == escape_char) |
5260325f | 375 | escape_pending = 1; |
7e8911cd | 376 | else |
5260325f | 377 | buffer_append(&stdin_buffer, buf, 1); |
5260325f | 378 | } |
5260325f | 379 | leave_non_blocking(); |
8efc0c15 | 380 | } |
8efc0c15 | 381 | } |
382 | ||
8efc0c15 | 383 | |
aa3378df | 384 | /* |
385 | * Make packets from buffered stdin data, and buffer them for sending to the | |
386 | * connection. | |
387 | */ | |
8efc0c15 | 388 | |
396c147e | 389 | static void |
5ca51e19 | 390 | client_make_packets_from_stdin_data(void) |
8efc0c15 | 391 | { |
1e3b8b07 | 392 | u_int len; |
5260325f | 393 | |
394 | /* Send buffered stdin data to the server. */ | |
395 | while (buffer_len(&stdin_buffer) > 0 && | |
184eed6a | 396 | packet_not_very_much_data_to_write()) { |
5260325f | 397 | len = buffer_len(&stdin_buffer); |
398 | /* Keep the packets at reasonable size. */ | |
399 | if (len > packet_get_maxsize()) | |
400 | len = packet_get_maxsize(); | |
401 | packet_start(SSH_CMSG_STDIN_DATA); | |
402 | packet_put_string(buffer_ptr(&stdin_buffer), len); | |
403 | packet_send(); | |
404 | buffer_consume(&stdin_buffer, len); | |
7e8911cd | 405 | stdin_bytes += len; |
5260325f | 406 | /* If we have a pending EOF, send it now. */ |
407 | if (stdin_eof && buffer_len(&stdin_buffer) == 0) { | |
408 | packet_start(SSH_CMSG_EOF); | |
409 | packet_send(); | |
410 | } | |
8efc0c15 | 411 | } |
8efc0c15 | 412 | } |
413 | ||
aa3378df | 414 | /* |
415 | * Checks if the client window has changed, and sends a packet about it to | |
416 | * the server if so. The actual change is detected elsewhere (by a software | |
417 | * interrupt on Unix); this just checks the flag and sends a message if | |
418 | * appropriate. | |
419 | */ | |
8efc0c15 | 420 | |
396c147e | 421 | static void |
5ca51e19 | 422 | client_check_window_change(void) |
8efc0c15 | 423 | { |
8ce64345 | 424 | struct winsize ws; |
425 | ||
426 | if (! received_window_change_signal) | |
427 | return; | |
428 | /** XXX race */ | |
429 | received_window_change_signal = 0; | |
430 | ||
de273eef | 431 | debug2("client_check_window_change: changed"); |
8ce64345 | 432 | |
433 | if (compat20) { | |
5e96b616 | 434 | channel_send_window_changes(); |
8ce64345 | 435 | } else { |
5e96b616 | 436 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
437 | return; | |
8ce64345 | 438 | packet_start(SSH_CMSG_WINDOW_SIZE); |
148de80c | 439 | packet_put_int((u_int)ws.ws_row); |
440 | packet_put_int((u_int)ws.ws_col); | |
441 | packet_put_int((u_int)ws.ws_xpixel); | |
442 | packet_put_int((u_int)ws.ws_ypixel); | |
8ce64345 | 443 | packet_send(); |
8efc0c15 | 444 | } |
8efc0c15 | 445 | } |
446 | ||
5d8d32a3 | 447 | static void |
448 | client_global_request_reply(int type, u_int32_t seq, void *ctxt) | |
449 | { | |
450 | server_alive_timeouts = 0; | |
451 | client_global_request_reply_fwd(type, seq, ctxt); | |
452 | } | |
453 | ||
454 | static void | |
455 | server_alive_check(void) | |
456 | { | |
457 | if (++server_alive_timeouts > options.server_alive_count_max) | |
458 | packet_disconnect("Timeout, server not responding."); | |
459 | packet_start(SSH2_MSG_GLOBAL_REQUEST); | |
460 | packet_put_cstring("keepalive@openssh.com"); | |
461 | packet_put_char(1); /* boolean: want reply */ | |
462 | packet_send(); | |
463 | } | |
464 | ||
aa3378df | 465 | /* |
466 | * Waits until the client can do something (some data becomes available on | |
467 | * one of the file descriptors). | |
468 | */ | |
396c147e | 469 | static void |
39929cdb | 470 | client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
9a995072 | 471 | int *maxfdp, u_int *nallocp, int rekeying) |
8efc0c15 | 472 | { |
5d8d32a3 | 473 | struct timeval tv, *tvp; |
474 | int ret; | |
475 | ||
39929cdb | 476 | /* Add any selections by the channel mechanism. */ |
489aa2e9 | 477 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); |
5260325f | 478 | |
8ce64345 | 479 | if (!compat20) { |
480 | /* Read from the connection, unless our buffers are full. */ | |
481 | if (buffer_len(&stdout_buffer) < buffer_high && | |
482 | buffer_len(&stderr_buffer) < buffer_high && | |
483 | channel_not_very_much_buffered_data()) | |
39929cdb | 484 | FD_SET(connection_in, *readsetp); |
8ce64345 | 485 | /* |
486 | * Read from stdin, unless we have seen EOF or have very much | |
487 | * buffered data to send to the server. | |
488 | */ | |
489 | if (!stdin_eof && packet_not_very_much_data_to_write()) | |
39929cdb | 490 | FD_SET(fileno(stdin), *readsetp); |
8ce64345 | 491 | |
492 | /* Select stdout/stderr if have data in buffer. */ | |
493 | if (buffer_len(&stdout_buffer) > 0) | |
39929cdb | 494 | FD_SET(fileno(stdout), *writesetp); |
8ce64345 | 495 | if (buffer_len(&stderr_buffer) > 0) |
39929cdb | 496 | FD_SET(fileno(stderr), *writesetp); |
8ce64345 | 497 | } else { |
24b6b45f | 498 | /* channel_prepare_select could have closed the last channel */ |
fd6cfbaf | 499 | if (session_closed && !channel_still_open() && |
500 | !packet_have_data_to_write()) { | |
501 | /* clear mask since we did not call select() */ | |
b3ad8fe6 | 502 | memset(*readsetp, 0, *nallocp); |
503 | memset(*writesetp, 0, *nallocp); | |
fd6cfbaf | 504 | return; |
24b6b45f | 505 | } else { |
506 | FD_SET(connection_in, *readsetp); | |
507 | } | |
8ce64345 | 508 | } |
5260325f | 509 | |
5260325f | 510 | /* Select server connection if have data to write to the server. */ |
511 | if (packet_have_data_to_write()) | |
39929cdb | 512 | FD_SET(connection_out, *writesetp); |
5260325f | 513 | |
5e96b616 | 514 | if (control_fd != -1) |
515 | FD_SET(control_fd, *readsetp); | |
516 | ||
aa3378df | 517 | /* |
518 | * Wait for something to happen. This will suspend the process until | |
519 | * some selected descriptor can be read, written, or has some other | |
5d8d32a3 | 520 | * event pending. |
aa3378df | 521 | */ |
5260325f | 522 | |
5d8d32a3 | 523 | if (options.server_alive_interval == 0 || !compat20) |
524 | tvp = NULL; | |
f2107e97 | 525 | else { |
5d8d32a3 | 526 | tv.tv_sec = options.server_alive_interval; |
527 | tv.tv_usec = 0; | |
528 | tvp = &tv; | |
529 | } | |
530 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); | |
531 | if (ret < 0) { | |
5260325f | 532 | char buf[100]; |
fd193ca4 | 533 | |
534 | /* | |
535 | * We have to clear the select masks, because we return. | |
536 | * We have to return, because the mainloop checks for the flags | |
537 | * set by the signal handlers. | |
538 | */ | |
b3ad8fe6 | 539 | memset(*readsetp, 0, *nallocp); |
540 | memset(*writesetp, 0, *nallocp); | |
fd193ca4 | 541 | |
5260325f | 542 | if (errno == EINTR) |
543 | return; | |
544 | /* Note: we might still have data in the buffers. */ | |
545 | snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); | |
546 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 547 | quit_pending = 1; |
5d8d32a3 | 548 | } else if (ret == 0) |
549 | server_alive_check(); | |
8efc0c15 | 550 | } |
551 | ||
396c147e | 552 | static void |
2e73a022 | 553 | client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
8efc0c15 | 554 | { |
5260325f | 555 | /* Flush stdout and stderr buffers. */ |
2e73a022 | 556 | if (buffer_len(bout) > 0) |
dc54438a | 557 | atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
2e73a022 | 558 | if (buffer_len(berr) > 0) |
dc54438a | 559 | atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr)); |
5260325f | 560 | |
5260325f | 561 | leave_raw_mode(); |
562 | ||
aa3378df | 563 | /* |
564 | * Free (and clear) the buffer to reduce the amount of data that gets | |
565 | * written to swap. | |
566 | */ | |
2e73a022 | 567 | buffer_free(bin); |
568 | buffer_free(bout); | |
569 | buffer_free(berr); | |
5260325f | 570 | |
5260325f | 571 | /* Send the suspend signal to the program itself. */ |
572 | kill(getpid(), SIGTSTP); | |
573 | ||
2c9a4d41 | 574 | /* Reset window sizes in case they have changed */ |
575 | received_window_change_signal = 1; | |
5260325f | 576 | |
577 | /* OK, we have been continued by the user. Reinitialize buffers. */ | |
2e73a022 | 578 | buffer_init(bin); |
579 | buffer_init(bout); | |
580 | buffer_init(berr); | |
5260325f | 581 | |
5260325f | 582 | enter_raw_mode(); |
8efc0c15 | 583 | } |
584 | ||
396c147e | 585 | static void |
b476adfa | 586 | client_process_net_input(fd_set *readset) |
8efc0c15 | 587 | { |
8ce64345 | 588 | int len; |
589 | char buf[8192]; | |
5260325f | 590 | |
aa3378df | 591 | /* |
592 | * Read input from the server, and add any such data to the buffer of | |
593 | * the packet subsystem. | |
594 | */ | |
5260325f | 595 | if (FD_ISSET(connection_in, readset)) { |
596 | /* Read as much as possible. */ | |
597 | len = read(connection_in, buf, sizeof(buf)); | |
598 | if (len == 0) { | |
599 | /* Received EOF. The remote host has closed the connection. */ | |
600 | snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n", | |
601 | host); | |
8efc0c15 | 602 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
8efc0c15 | 603 | quit_pending = 1; |
604 | return; | |
5260325f | 605 | } |
aa3378df | 606 | /* |
607 | * There is a kernel bug on Solaris that causes select to | |
608 | * sometimes wake up even though there is no data available. | |
609 | */ | |
09cb311c | 610 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
5260325f | 611 | len = 0; |
612 | ||
613 | if (len < 0) { | |
614 | /* An error has encountered. Perhaps there is a network problem. */ | |
615 | snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n", | |
616 | host, strerror(errno)); | |
617 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 618 | quit_pending = 1; |
619 | return; | |
620 | } | |
621 | packet_process_incoming(buf, len); | |
622 | } | |
8ce64345 | 623 | } |
624 | ||
5e96b616 | 625 | static void |
626 | client_subsystem_reply(int type, u_int32_t seq, void *ctxt) | |
627 | { | |
628 | int id; | |
629 | Channel *c; | |
f2107e97 | 630 | |
5e96b616 | 631 | id = packet_get_int(); |
632 | packet_check_eom(); | |
633 | ||
634 | if ((c = channel_lookup(id)) == NULL) { | |
635 | error("%s: no channel for id %d", __func__, id); | |
636 | return; | |
637 | } | |
638 | ||
639 | if (type == SSH2_MSG_CHANNEL_SUCCESS) | |
640 | debug2("Request suceeded on channel %d", id); | |
641 | else if (type == SSH2_MSG_CHANNEL_FAILURE) { | |
642 | error("Request failed on channel %d", id); | |
643 | channel_free(c); | |
644 | } | |
645 | } | |
646 | ||
647 | static void | |
648 | client_extra_session2_setup(int id, void *arg) | |
649 | { | |
650 | struct confirm_ctx *cctx = arg; | |
ef07103c | 651 | const char *display; |
5e96b616 | 652 | Channel *c; |
1786be35 | 653 | int i; |
f2107e97 | 654 | |
5e96b616 | 655 | if (cctx == NULL) |
656 | fatal("%s: cctx == NULL", __func__); | |
657 | if ((c = channel_lookup(id)) == NULL) | |
658 | fatal("%s: no channel for id %d", __func__, id); | |
659 | ||
56964485 | 660 | display = getenv("DISPLAY"); |
ef07103c | 661 | if (cctx->want_x_fwd && options.forward_x11 && display != NULL) { |
662 | char *proto, *data; | |
663 | /* Get reasonable local authentication information. */ | |
664 | client_x11_get_proto(display, options.xauth_location, | |
665 | options.forward_x11_trusted, &proto, &data); | |
666 | /* Request forwarding with authentication spoofing. */ | |
667 | debug("Requesting X11 forwarding with authentication spoofing."); | |
668 | x11_request_forwarding_with_spoofing(id, display, proto, data); | |
669 | /* XXX wait for reply */ | |
670 | } | |
671 | ||
672 | if (cctx->want_agent_fwd && options.forward_agent) { | |
673 | debug("Requesting authentication agent forwarding."); | |
674 | channel_request_start(id, "auth-agent-req@openssh.com", 0); | |
675 | packet_send(); | |
676 | } | |
677 | ||
f2107e97 | 678 | client_session2_setup(id, cctx->want_tty, cctx->want_subsys, |
1786be35 | 679 | cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env, |
5e96b616 | 680 | client_subsystem_reply); |
0d34d6ce | 681 | |
5e96b616 | 682 | c->confirm_ctx = NULL; |
683 | buffer_free(&cctx->cmd); | |
1786be35 | 684 | xfree(cctx->term); |
685 | if (cctx->env != NULL) { | |
686 | for (i = 0; cctx->env[i] != NULL; i++) | |
687 | xfree(cctx->env[i]); | |
688 | xfree(cctx->env); | |
f2107e97 | 689 | } |
1786be35 | 690 | xfree(cctx); |
5e96b616 | 691 | } |
692 | ||
693 | static void | |
b476adfa | 694 | client_process_control(fd_set *readset) |
5e96b616 | 695 | { |
696 | Buffer m; | |
697 | Channel *c; | |
2ceb8101 | 698 | int client_fd, new_fd[3], ver, allowed; |
5e96b616 | 699 | socklen_t addrlen; |
700 | struct sockaddr_storage addr; | |
701 | struct confirm_ctx *cctx; | |
702 | char *cmd; | |
2ceb8101 | 703 | u_int i, len, env_len, command, flags; |
5e96b616 | 704 | uid_t euid; |
705 | gid_t egid; | |
706 | ||
707 | /* | |
708 | * Accept connection on control socket | |
709 | */ | |
710 | if (control_fd == -1 || !FD_ISSET(control_fd, readset)) | |
711 | return; | |
712 | ||
713 | memset(&addr, 0, sizeof(addr)); | |
714 | addrlen = sizeof(addr); | |
715 | if ((client_fd = accept(control_fd, | |
716 | (struct sockaddr*)&addr, &addrlen)) == -1) { | |
717 | error("%s accept: %s", __func__, strerror(errno)); | |
718 | return; | |
719 | } | |
720 | ||
721 | if (getpeereid(client_fd, &euid, &egid) < 0) { | |
722 | error("%s getpeereid failed: %s", __func__, strerror(errno)); | |
723 | close(client_fd); | |
724 | return; | |
725 | } | |
726 | if ((euid != 0) && (getuid() != euid)) { | |
727 | error("control mode uid mismatch: peer euid %u != uid %u", | |
728 | (u_int) euid, (u_int) getuid()); | |
729 | close(client_fd); | |
730 | return; | |
731 | } | |
0d34d6ce | 732 | |
5e96b616 | 733 | unset_nonblock(client_fd); |
734 | ||
f8c6db83 | 735 | /* Read command */ |
5e96b616 | 736 | buffer_init(&m); |
f8c6db83 | 737 | if (ssh_msg_recv(client_fd, &m) == -1) { |
738 | error("%s: client msg_recv failed", __func__); | |
739 | close(client_fd); | |
740 | buffer_free(&m); | |
741 | return; | |
742 | } | |
ef07103c | 743 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
f8c6db83 | 744 | error("%s: wrong client version %d", __func__, ver); |
745 | buffer_free(&m); | |
746 | close(client_fd); | |
747 | return; | |
748 | } | |
749 | ||
750 | allowed = 1; | |
751 | command = buffer_get_int(&m); | |
752 | flags = buffer_get_int(&m); | |
753 | ||
754 | buffer_clear(&m); | |
5e96b616 | 755 | |
f8c6db83 | 756 | switch (command) { |
757 | case SSHMUX_COMMAND_OPEN: | |
9dfd96d6 | 758 | if (options.control_master == SSHCTL_MASTER_ASK || |
759 | options.control_master == SSHCTL_MASTER_AUTO_ASK) | |
f8c6db83 | 760 | allowed = ask_permission("Allow shared connection " |
761 | "to %s? ", host); | |
762 | /* continue below */ | |
763 | break; | |
764 | case SSHMUX_COMMAND_TERMINATE: | |
9dfd96d6 | 765 | if (options.control_master == SSHCTL_MASTER_ASK || |
766 | options.control_master == SSHCTL_MASTER_AUTO_ASK) | |
f8c6db83 | 767 | allowed = ask_permission("Terminate shared connection " |
768 | "to %s? ", host); | |
769 | if (allowed) | |
770 | quit_pending = 1; | |
f8cc7664 | 771 | /* FALLTHROUGH */ |
f8c6db83 | 772 | case SSHMUX_COMMAND_ALIVE_CHECK: |
773 | /* Reply for SSHMUX_COMMAND_TERMINATE and ALIVE_CHECK */ | |
774 | buffer_clear(&m); | |
775 | buffer_put_int(&m, allowed); | |
776 | buffer_put_int(&m, getpid()); | |
ef07103c | 777 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
f8c6db83 | 778 | error("%s: client msg_send failed", __func__); |
779 | close(client_fd); | |
780 | buffer_free(&m); | |
781 | return; | |
782 | } | |
783 | buffer_free(&m); | |
784 | close(client_fd); | |
785 | return; | |
786 | default: | |
787 | error("Unsupported command %d", command); | |
788 | buffer_free(&m); | |
789 | close(client_fd); | |
790 | return; | |
791 | } | |
792 | ||
793 | /* Reply for SSHMUX_COMMAND_OPEN */ | |
794 | buffer_clear(&m); | |
0d34d6ce | 795 | buffer_put_int(&m, allowed); |
5e96b616 | 796 | buffer_put_int(&m, getpid()); |
ef07103c | 797 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
5e96b616 | 798 | error("%s: client msg_send failed", __func__); |
799 | close(client_fd); | |
0d34d6ce | 800 | buffer_free(&m); |
5e96b616 | 801 | return; |
802 | } | |
5e96b616 | 803 | |
0d34d6ce | 804 | if (!allowed) { |
805 | error("Refused control connection"); | |
806 | close(client_fd); | |
807 | buffer_free(&m); | |
808 | return; | |
809 | } | |
810 | ||
f8c6db83 | 811 | buffer_clear(&m); |
5e96b616 | 812 | if (ssh_msg_recv(client_fd, &m) == -1) { |
813 | error("%s: client msg_recv failed", __func__); | |
814 | close(client_fd); | |
0d34d6ce | 815 | buffer_free(&m); |
5e96b616 | 816 | return; |
817 | } | |
ef07103c | 818 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
5e96b616 | 819 | error("%s: wrong client version %d", __func__, ver); |
820 | buffer_free(&m); | |
821 | close(client_fd); | |
822 | return; | |
823 | } | |
824 | ||
52e3daed | 825 | cctx = xcalloc(1, sizeof(*cctx)); |
f8c6db83 | 826 | cctx->want_tty = (flags & SSHMUX_FLAG_TTY) != 0; |
827 | cctx->want_subsys = (flags & SSHMUX_FLAG_SUBSYS) != 0; | |
ef07103c | 828 | cctx->want_x_fwd = (flags & SSHMUX_FLAG_X11_FWD) != 0; |
829 | cctx->want_agent_fwd = (flags & SSHMUX_FLAG_AGENT_FWD) != 0; | |
5e96b616 | 830 | cctx->term = buffer_get_string(&m, &len); |
831 | ||
832 | cmd = buffer_get_string(&m, &len); | |
833 | buffer_init(&cctx->cmd); | |
834 | buffer_append(&cctx->cmd, cmd, strlen(cmd)); | |
835 | ||
1786be35 | 836 | env_len = buffer_get_int(&m); |
837 | env_len = MIN(env_len, 4096); | |
838 | debug3("%s: receiving %d env vars", __func__, env_len); | |
839 | if (env_len != 0) { | |
52e3daed | 840 | cctx->env = xcalloc(env_len + 1, sizeof(*cctx->env)); |
1786be35 | 841 | for (i = 0; i < env_len; i++) |
842 | cctx->env[i] = buffer_get_string(&m, &len); | |
843 | cctx->env[i] = NULL; | |
844 | } | |
845 | ||
5e96b616 | 846 | debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__, |
847 | cctx->want_tty, cctx->want_subsys, cmd); | |
3173dd0d | 848 | xfree(cmd); |
5e96b616 | 849 | |
850 | /* Gather fds from client */ | |
851 | new_fd[0] = mm_receive_fd(client_fd); | |
852 | new_fd[1] = mm_receive_fd(client_fd); | |
853 | new_fd[2] = mm_receive_fd(client_fd); | |
854 | ||
855 | debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__, | |
856 | new_fd[0], new_fd[1], new_fd[2]); | |
857 | ||
858 | /* Try to pick up ttymodes from client before it goes raw */ | |
859 | if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1) | |
860 | error("%s: tcgetattr: %s", __func__, strerror(errno)); | |
861 | ||
f8c6db83 | 862 | /* This roundtrip is just for synchronisation of ttymodes */ |
5e96b616 | 863 | buffer_clear(&m); |
ef07103c | 864 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
5e96b616 | 865 | error("%s: client msg_send failed", __func__); |
866 | close(client_fd); | |
867 | close(new_fd[0]); | |
868 | close(new_fd[1]); | |
869 | close(new_fd[2]); | |
0d34d6ce | 870 | buffer_free(&m); |
f8c6db83 | 871 | xfree(cctx->term); |
872 | if (env_len != 0) { | |
873 | for (i = 0; i < env_len; i++) | |
874 | xfree(cctx->env[i]); | |
875 | xfree(cctx->env); | |
876 | } | |
5e96b616 | 877 | return; |
878 | } | |
879 | buffer_free(&m); | |
880 | ||
881 | /* enable nonblocking unless tty */ | |
882 | if (!isatty(new_fd[0])) | |
883 | set_nonblock(new_fd[0]); | |
884 | if (!isatty(new_fd[1])) | |
885 | set_nonblock(new_fd[1]); | |
886 | if (!isatty(new_fd[2])) | |
887 | set_nonblock(new_fd[2]); | |
888 | ||
889 | set_nonblock(client_fd); | |
890 | ||
f2107e97 | 891 | c = channel_new("session", SSH_CHANNEL_OPENING, |
5e96b616 | 892 | new_fd[0], new_fd[1], new_fd[2], |
893 | CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT, | |
894 | CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0); | |
895 | ||
896 | /* XXX */ | |
897 | c->ctl_fd = client_fd; | |
898 | ||
899 | debug3("%s: channel_new: %d", __func__, c->self); | |
900 | ||
901 | channel_send_open(c->self); | |
902 | channel_register_confirm(c->self, client_extra_session2_setup, cctx); | |
903 | } | |
904 | ||
c53c54c2 | 905 | static void |
ec9b7086 | 906 | process_cmdline(void) |
c53c54c2 | 907 | { |
c53c54c2 | 908 | void (*handler)(int); |
3867aa0a | 909 | char *s, *cmd, *cancel_host; |
d740ec16 | 910 | int delete = 0; |
c53c54c2 | 911 | int local = 0; |
3867aa0a | 912 | u_short cancel_port; |
913 | Forward fwd; | |
c53c54c2 | 914 | |
915 | leave_raw_mode(); | |
875ec275 | 916 | handler = signal(SIGINT, SIG_IGN); |
ec9b7086 | 917 | cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); |
c53c54c2 | 918 | if (s == NULL) |
919 | goto out; | |
c53c54c2 | 920 | while (*s && isspace(*s)) |
921 | s++; | |
d740ec16 | 922 | if (*s == '-') |
923 | s++; /* Skip cmdline '-', if any */ | |
27c6fcae | 924 | if (*s == '\0') |
c53c54c2 | 925 | goto out; |
d740ec16 | 926 | |
7069a5e2 | 927 | if (*s == 'h' || *s == 'H' || *s == '?') { |
d740ec16 | 928 | logit("Commands:"); |
9f1090be | 929 | logit(" -L[bind_address:]port:host:hostport " |
930 | "Request local forward"); | |
931 | logit(" -R[bind_address:]port:host:hostport " | |
932 | "Request remote forward"); | |
33f13fa5 | 933 | logit(" -KR[bind_address:]port " |
9f1090be | 934 | "Cancel remote forward"); |
d20f3c9e | 935 | if (!options.permit_local_command) |
936 | goto out; | |
9f1090be | 937 | logit(" !args " |
938 | "Execute local command"); | |
d20f3c9e | 939 | goto out; |
940 | } | |
941 | ||
942 | if (*s == '!' && options.permit_local_command) { | |
943 | s++; | |
944 | ssh_local_cmd(s); | |
d740ec16 | 945 | goto out; |
946 | } | |
947 | ||
948 | if (*s == 'K') { | |
949 | delete = 1; | |
950 | s++; | |
951 | } | |
952 | if (*s != 'L' && *s != 'R') { | |
bbe88b6d | 953 | logit("Invalid command."); |
c53c54c2 | 954 | goto out; |
955 | } | |
d740ec16 | 956 | if (*s == 'L') |
c53c54c2 | 957 | local = 1; |
d740ec16 | 958 | if (local && delete) { |
959 | logit("Not supported."); | |
960 | goto out; | |
961 | } | |
962 | if ((!local || delete) && !compat20) { | |
bbe88b6d | 963 | logit("Not supported for SSH protocol version 1."); |
c53c54c2 | 964 | goto out; |
965 | } | |
d740ec16 | 966 | |
967 | s++; | |
c53c54c2 | 968 | while (*s && isspace(*s)) |
969 | s++; | |
970 | ||
d740ec16 | 971 | if (delete) { |
3867aa0a | 972 | cancel_port = 0; |
973 | cancel_host = hpdelim(&s); /* may be NULL */ | |
974 | if (s != NULL) { | |
975 | cancel_port = a2port(s); | |
976 | cancel_host = cleanhostname(cancel_host); | |
977 | } else { | |
978 | cancel_port = a2port(cancel_host); | |
979 | cancel_host = NULL; | |
d740ec16 | 980 | } |
3867aa0a | 981 | if (cancel_port == 0) { |
982 | logit("Bad forwarding close port"); | |
c53c54c2 | 983 | goto out; |
984 | } | |
3867aa0a | 985 | channel_request_rforward_cancel(cancel_host, cancel_port); |
d740ec16 | 986 | } else { |
3867aa0a | 987 | if (!parse_forward(&fwd, s)) { |
d740ec16 | 988 | logit("Bad forwarding specification."); |
989 | goto out; | |
990 | } | |
d740ec16 | 991 | if (local) { |
3867aa0a | 992 | if (channel_setup_local_fwd_listener(fwd.listen_host, |
993 | fwd.listen_port, fwd.connect_host, | |
994 | fwd.connect_port, options.gateway_ports) < 0) { | |
d740ec16 | 995 | logit("Port forwarding failed."); |
996 | goto out; | |
997 | } | |
3867aa0a | 998 | } else { |
999 | channel_request_remote_forwarding(fwd.listen_host, | |
1000 | fwd.listen_port, fwd.connect_host, | |
1001 | fwd.connect_port); | |
1002 | } | |
1003 | ||
d740ec16 | 1004 | logit("Forwarding port."); |
1005 | } | |
1006 | ||
c53c54c2 | 1007 | out: |
1008 | signal(SIGINT, handler); | |
1009 | enter_raw_mode(); | |
1010 | if (cmd) | |
1011 | xfree(cmd); | |
1012 | } | |
1013 | ||
2e73a022 | 1014 | /* process the characters one by one */ |
396c147e | 1015 | static int |
2e73a022 | 1016 | process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len) |
1017 | { | |
1018 | char string[1024]; | |
1019 | pid_t pid; | |
1020 | int bytes = 0; | |
1e3b8b07 | 1021 | u_int i; |
1022 | u_char ch; | |
2e73a022 | 1023 | char *s; |
1024 | ||
2ceb8101 | 1025 | if (len <= 0) |
1026 | return (0); | |
1027 | ||
1028 | for (i = 0; i < (u_int)len; i++) { | |
2e73a022 | 1029 | /* Get one character at a time. */ |
1030 | ch = buf[i]; | |
1031 | ||
1032 | if (escape_pending) { | |
1033 | /* We have previously seen an escape character. */ | |
1034 | /* Clear the flag now. */ | |
1035 | escape_pending = 0; | |
1036 | ||
1037 | /* Process the escaped character. */ | |
1038 | switch (ch) { | |
1039 | case '.': | |
1040 | /* Terminate the connection. */ | |
1041 | snprintf(string, sizeof string, "%c.\r\n", escape_char); | |
1042 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1043 | |
1044 | quit_pending = 1; | |
1045 | return -1; | |
1046 | ||
1047 | case 'Z' - 64: | |
1048 | /* Suspend the program. */ | |
1049 | /* Print a message to that effect to the user. */ | |
1050 | snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char); | |
1051 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1052 | |
1053 | /* Restore terminal modes and suspend. */ | |
1054 | client_suspend_self(bin, bout, berr); | |
1055 | ||
1056 | /* We have been continued. */ | |
1057 | continue; | |
1058 | ||
16a79097 | 1059 | case 'B': |
1060 | if (compat20) { | |
1061 | snprintf(string, sizeof string, | |
1062 | "%cB\r\n", escape_char); | |
1063 | buffer_append(berr, string, | |
1064 | strlen(string)); | |
1065 | channel_request_start(session_ident, | |
1066 | "break", 0); | |
1067 | packet_put_int(1000); | |
1068 | packet_send(); | |
1069 | } | |
1070 | continue; | |
1071 | ||
e092ce67 | 1072 | case 'R': |
54506d2e | 1073 | if (compat20) { |
1074 | if (datafellows & SSH_BUG_NOREKEY) | |
bbe88b6d | 1075 | logit("Server does not support re-keying"); |
54506d2e | 1076 | else |
1077 | need_rekeying = 1; | |
1078 | } | |
e092ce67 | 1079 | continue; |
1080 | ||
2e73a022 | 1081 | case '&': |
2e73a022 | 1082 | /* |
1083 | * Detach the program (continue to serve connections, | |
1084 | * but put in background and no more new connections). | |
1085 | */ | |
2e73a022 | 1086 | /* Restore tty modes. */ |
1087 | leave_raw_mode(); | |
1088 | ||
1089 | /* Stop listening for new connections. */ | |
c6940381 | 1090 | channel_stop_listening(); |
2e73a022 | 1091 | |
c6940381 | 1092 | snprintf(string, sizeof string, |
1093 | "%c& [backgrounded]\n", escape_char); | |
1094 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1095 | |
1096 | /* Fork into background. */ | |
1097 | pid = fork(); | |
1098 | if (pid < 0) { | |
1099 | error("fork: %.100s", strerror(errno)); | |
1100 | continue; | |
1101 | } | |
1102 | if (pid != 0) { /* This is the parent. */ | |
1103 | /* The parent just exits. */ | |
1104 | exit(0); | |
1105 | } | |
1106 | /* The child continues serving connections. */ | |
c6940381 | 1107 | if (compat20) { |
1108 | buffer_append(bin, "\004", 1); | |
1109 | /* fake EOF on stdin */ | |
1110 | return -1; | |
1111 | } else if (!stdin_eof) { | |
1112 | /* | |
1113 | * Sending SSH_CMSG_EOF alone does not always appear | |
1114 | * to be enough. So we try to send an EOF character | |
1115 | * first. | |
1116 | */ | |
1117 | packet_start(SSH_CMSG_STDIN_DATA); | |
1118 | packet_put_string("\004", 1); | |
1119 | packet_send(); | |
1120 | /* Close stdin. */ | |
1121 | stdin_eof = 1; | |
1122 | if (buffer_len(bin) == 0) { | |
1123 | packet_start(SSH_CMSG_EOF); | |
1124 | packet_send(); | |
1125 | } | |
1126 | } | |
1127 | continue; | |
2e73a022 | 1128 | |
1129 | case '?': | |
1130 | snprintf(string, sizeof string, | |
1131 | "%c?\r\n\ | |
1132 | Supported escape sequences:\r\n\ | |
1d77f8cb | 1133 | %c. - terminate connection\r\n\ |
16a79097 | 1134 | %cB - send a BREAK to the remote system\r\n\ |
1d77f8cb | 1135 | %cC - open a command line\r\n\ |
1136 | %cR - Request rekey (SSH protocol 2 only)\r\n\ | |
1137 | %c^Z - suspend ssh\r\n\ | |
1138 | %c# - list forwarded connections\r\n\ | |
1139 | %c& - background ssh (when waiting for connections to terminate)\r\n\ | |
1140 | %c? - this message\r\n\ | |
1141 | %c%c - send the escape character by typing it twice\r\n\ | |
2e73a022 | 1142 | (Note that escapes are only recognized immediately after newline.)\r\n", |
1d77f8cb | 1143 | escape_char, escape_char, escape_char, escape_char, |
1144 | escape_char, escape_char, escape_char, escape_char, | |
16a79097 | 1145 | escape_char, escape_char, escape_char); |
2e73a022 | 1146 | buffer_append(berr, string, strlen(string)); |
1147 | continue; | |
1148 | ||
1149 | case '#': | |
1150 | snprintf(string, sizeof string, "%c#\r\n", escape_char); | |
1151 | buffer_append(berr, string, strlen(string)); | |
1152 | s = channel_open_message(); | |
1153 | buffer_append(berr, s, strlen(s)); | |
1154 | xfree(s); | |
1155 | continue; | |
1156 | ||
c53c54c2 | 1157 | case 'C': |
ec9b7086 | 1158 | process_cmdline(); |
c53c54c2 | 1159 | continue; |
1160 | ||
2e73a022 | 1161 | default: |
1162 | if (ch != escape_char) { | |
1163 | buffer_put_char(bin, escape_char); | |
1164 | bytes++; | |
1165 | } | |
1166 | /* Escaped characters fall through here */ | |
1167 | break; | |
1168 | } | |
1169 | } else { | |
1170 | /* | |
1171 | * The previous character was not an escape char. Check if this | |
1172 | * is an escape. | |
1173 | */ | |
1174 | if (last_was_cr && ch == escape_char) { | |
1175 | /* It is. Set the flag and continue to next character. */ | |
1176 | escape_pending = 1; | |
1177 | continue; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Normal character. Record whether it was a newline, | |
1183 | * and append it to the buffer. | |
1184 | */ | |
1185 | last_was_cr = (ch == '\r' || ch == '\n'); | |
1186 | buffer_put_char(bin, ch); | |
1187 | bytes++; | |
1188 | } | |
1189 | return bytes; | |
1190 | } | |
1191 | ||
396c147e | 1192 | static void |
b476adfa | 1193 | client_process_input(fd_set *readset) |
8ce64345 | 1194 | { |
9da5c3c9 | 1195 | int len; |
2e73a022 | 1196 | char buf[8192]; |
8ce64345 | 1197 | |
5260325f | 1198 | /* Read input from stdin. */ |
1199 | if (FD_ISSET(fileno(stdin), readset)) { | |
1200 | /* Read as much as possible. */ | |
1201 | len = read(fileno(stdin), buf, sizeof(buf)); | |
cf6bc93c | 1202 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
1203 | return; /* we'll try again later */ | |
5260325f | 1204 | if (len <= 0) { |
aa3378df | 1205 | /* |
1206 | * Received EOF or error. They are treated | |
1207 | * similarly, except that an error message is printed | |
1208 | * if it was an error condition. | |
1209 | */ | |
5260325f | 1210 | if (len < 0) { |
1211 | snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno)); | |
1212 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 1213 | } |
1214 | /* Mark that we have seen EOF. */ | |
1215 | stdin_eof = 1; | |
aa3378df | 1216 | /* |
1217 | * Send an EOF message to the server unless there is | |
1218 | * data in the buffer. If there is data in the | |
1219 | * buffer, no message will be sent now. Code | |
1220 | * elsewhere will send the EOF when the buffer | |
1221 | * becomes empty if stdin_eof is set. | |
1222 | */ | |
5260325f | 1223 | if (buffer_len(&stdin_buffer) == 0) { |
8efc0c15 | 1224 | packet_start(SSH_CMSG_EOF); |
1225 | packet_send(); | |
5260325f | 1226 | } |
4bf9c10e | 1227 | } else if (escape_char == SSH_ESCAPECHAR_NONE) { |
aa3378df | 1228 | /* |
1229 | * Normal successful read, and no escape character. | |
1230 | * Just append the data to buffer. | |
1231 | */ | |
5260325f | 1232 | buffer_append(&stdin_buffer, buf, len); |
5260325f | 1233 | } else { |
aa3378df | 1234 | /* |
1235 | * Normal, successful read. But we have an escape character | |
1236 | * and have to process the characters one by one. | |
1237 | */ | |
7e8911cd | 1238 | if (process_escapes(&stdin_buffer, &stdout_buffer, |
1239 | &stderr_buffer, buf, len) == -1) | |
2e73a022 | 1240 | return; |
5260325f | 1241 | } |
1242 | } | |
8efc0c15 | 1243 | } |
1244 | ||
396c147e | 1245 | static void |
b476adfa | 1246 | client_process_output(fd_set *writeset) |
8efc0c15 | 1247 | { |
5260325f | 1248 | int len; |
1249 | char buf[100]; | |
1250 | ||
1251 | /* Write buffered output to stdout. */ | |
1252 | if (FD_ISSET(fileno(stdout), writeset)) { | |
1253 | /* Write as much data as possible. */ | |
1254 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1255 | buffer_len(&stdout_buffer)); |
5260325f | 1256 | if (len <= 0) { |
cf6bc93c | 1257 | if (errno == EINTR || errno == EAGAIN) |
5260325f | 1258 | len = 0; |
1259 | else { | |
aa3378df | 1260 | /* |
1261 | * An error or EOF was encountered. Put an | |
1262 | * error message to stderr buffer. | |
1263 | */ | |
5260325f | 1264 | snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno)); |
1265 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 1266 | quit_pending = 1; |
1267 | return; | |
1268 | } | |
1269 | } | |
1270 | /* Consume printed data from the buffer. */ | |
1271 | buffer_consume(&stdout_buffer, len); | |
cd332296 | 1272 | stdout_bytes += len; |
5260325f | 1273 | } |
1274 | /* Write buffered output to stderr. */ | |
1275 | if (FD_ISSET(fileno(stderr), writeset)) { | |
1276 | /* Write as much data as possible. */ | |
1277 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1278 | buffer_len(&stderr_buffer)); |
5260325f | 1279 | if (len <= 0) { |
cf6bc93c | 1280 | if (errno == EINTR || errno == EAGAIN) |
5260325f | 1281 | len = 0; |
1282 | else { | |
aa3378df | 1283 | /* EOF or error, but can't even print error message. */ |
5260325f | 1284 | quit_pending = 1; |
1285 | return; | |
1286 | } | |
1287 | } | |
1288 | /* Consume printed characters from the buffer. */ | |
1289 | buffer_consume(&stderr_buffer, len); | |
cd332296 | 1290 | stderr_bytes += len; |
8efc0c15 | 1291 | } |
8efc0c15 | 1292 | } |
1293 | ||
7368a6c8 | 1294 | /* |
1295 | * Get packets from the connection input buffer, and process them as long as | |
1296 | * there are packets available. | |
1297 | * | |
1298 | * Any unknown packets received during the actual | |
1299 | * session cause the session to terminate. This is | |
1300 | * intended to make debugging easier since no | |
1301 | * confirmations are sent. Any compatible protocol | |
1302 | * extensions must be negotiated during the | |
1303 | * preparatory phase. | |
1304 | */ | |
1305 | ||
396c147e | 1306 | static void |
5ca51e19 | 1307 | client_process_buffered_input_packets(void) |
7368a6c8 | 1308 | { |
e092ce67 | 1309 | dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL); |
7368a6c8 | 1310 | } |
1311 | ||
2e73a022 | 1312 | /* scan buf[] for '~' before sending data to the peer */ |
1313 | ||
396c147e | 1314 | static int |
2e73a022 | 1315 | simple_escape_filter(Channel *c, char *buf, int len) |
1316 | { | |
1317 | /* XXX we assume c->extended is writeable */ | |
1318 | return process_escapes(&c->input, &c->output, &c->extended, buf, len); | |
1319 | } | |
1320 | ||
396c147e | 1321 | static void |
eb0dd41f | 1322 | client_channel_closed(int id, void *arg) |
1323 | { | |
418e724c | 1324 | channel_cancel_cleanup(id); |
eb0dd41f | 1325 | session_closed = 1; |
82de775c | 1326 | leave_raw_mode(); |
eb0dd41f | 1327 | } |
1328 | ||
aa3378df | 1329 | /* |
1330 | * Implements the interactive session with the server. This is called after | |
1331 | * the user has been authenticated, and a command has been started on the | |
4bf9c10e | 1332 | * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character |
1333 | * used as an escape character for terminating or suspending the session. | |
aa3378df | 1334 | */ |
8efc0c15 | 1335 | |
6ae2364d | 1336 | int |
2e73a022 | 1337 | client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) |
8efc0c15 | 1338 | { |
39929cdb | 1339 | fd_set *readset = NULL, *writeset = NULL; |
5260325f | 1340 | double start_time, total_time; |
9a995072 | 1341 | int max_fd = 0, max_fd2 = 0, len, rekeying = 0; |
1342 | u_int nalloc = 0; | |
5260325f | 1343 | char buf[100]; |
1344 | ||
1345 | debug("Entering interactive session."); | |
1346 | ||
1347 | start_time = get_current_time(); | |
1348 | ||
1349 | /* Initialize variables. */ | |
1350 | escape_pending = 0; | |
1351 | last_was_cr = 1; | |
1352 | exit_status = -1; | |
1353 | stdin_eof = 0; | |
1354 | buffer_high = 64 * 1024; | |
1355 | connection_in = packet_get_connection_in(); | |
1356 | connection_out = packet_get_connection_out(); | |
39929cdb | 1357 | max_fd = MAX(connection_in, connection_out); |
5e96b616 | 1358 | if (control_fd != -1) |
1359 | max_fd = MAX(max_fd, control_fd); | |
39929cdb | 1360 | |
1361 | if (!compat20) { | |
e968270c | 1362 | /* enable nonblocking unless tty */ |
1363 | if (!isatty(fileno(stdin))) | |
1364 | set_nonblock(fileno(stdin)); | |
1365 | if (!isatty(fileno(stdout))) | |
1366 | set_nonblock(fileno(stdout)); | |
1367 | if (!isatty(fileno(stderr))) | |
1368 | set_nonblock(fileno(stderr)); | |
39929cdb | 1369 | max_fd = MAX(max_fd, fileno(stdin)); |
1370 | max_fd = MAX(max_fd, fileno(stdout)); | |
1371 | max_fd = MAX(max_fd, fileno(stderr)); | |
1372 | } | |
5260325f | 1373 | stdin_bytes = 0; |
1374 | stdout_bytes = 0; | |
1375 | stderr_bytes = 0; | |
1376 | quit_pending = 0; | |
1377 | escape_char = escape_char_arg; | |
1378 | ||
1379 | /* Initialize buffers. */ | |
1380 | buffer_init(&stdin_buffer); | |
1381 | buffer_init(&stdout_buffer); | |
1382 | buffer_init(&stderr_buffer); | |
1383 | ||
7368a6c8 | 1384 | client_init_dispatch(); |
1385 | ||
3c93c917 | 1386 | /* |
1387 | * Set signal handlers, (e.g. to restore non-blocking mode) | |
1388 | * but don't overwrite SIG_IGN, matches behaviour from rsh(1) | |
1389 | */ | |
d3e5d1e9 | 1390 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
1391 | signal(SIGHUP, signal_handler); | |
3c93c917 | 1392 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
1393 | signal(SIGINT, signal_handler); | |
1394 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) | |
1395 | signal(SIGQUIT, signal_handler); | |
1396 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) | |
1397 | signal(SIGTERM, signal_handler); | |
2c9a4d41 | 1398 | signal(SIGWINCH, window_change_handler); |
5260325f | 1399 | |
5260325f | 1400 | if (have_pty) |
1401 | enter_raw_mode(); | |
1402 | ||
1fc8ccdf | 1403 | if (compat20) { |
1404 | session_ident = ssh2_chan_id; | |
4bf9c10e | 1405 | if (escape_char != SSH_ESCAPECHAR_NONE) |
1fc8ccdf | 1406 | channel_register_filter(session_ident, |
c1c6a032 | 1407 | simple_escape_filter, NULL); |
eb0dd41f | 1408 | if (session_ident != -1) |
1409 | channel_register_cleanup(session_ident, | |
8cd0437d | 1410 | client_channel_closed, 0); |
1fc8ccdf | 1411 | } else { |
1412 | /* Check if we should immediately send eof on stdin. */ | |
8ce64345 | 1413 | client_check_initial_eof_on_stdin(); |
1fc8ccdf | 1414 | } |
2e73a022 | 1415 | |
5260325f | 1416 | /* Main loop of the client for the interactive session mode. */ |
1417 | while (!quit_pending) { | |
5260325f | 1418 | |
aa3378df | 1419 | /* Process buffered packets sent by the server. */ |
5260325f | 1420 | client_process_buffered_input_packets(); |
1421 | ||
eb0dd41f | 1422 | if (compat20 && session_closed && !channel_still_open()) |
8ce64345 | 1423 | break; |
eb0dd41f | 1424 | |
1425 | rekeying = (xxx_kex != NULL && !xxx_kex->done); | |
8ce64345 | 1426 | |
c422989b | 1427 | if (rekeying) { |
1428 | debug("rekeying in progress"); | |
1429 | } else { | |
1430 | /* | |
1431 | * Make packets of buffered stdin data, and buffer | |
1432 | * them for sending to the server. | |
1433 | */ | |
1434 | if (!compat20) | |
1435 | client_make_packets_from_stdin_data(); | |
5260325f | 1436 | |
c422989b | 1437 | /* |
1438 | * Make packets from buffered channel data, and | |
1439 | * enqueue them for sending to the server. | |
1440 | */ | |
1441 | if (packet_not_very_much_data_to_write()) | |
1442 | channel_output_poll(); | |
5260325f | 1443 | |
c422989b | 1444 | /* |
1445 | * Check if the window size has changed, and buffer a | |
1446 | * message about it to the server if so. | |
1447 | */ | |
1448 | client_check_window_change(); | |
5260325f | 1449 | |
c422989b | 1450 | if (quit_pending) |
1451 | break; | |
1452 | } | |
aa3378df | 1453 | /* |
1454 | * Wait until we have something to do (something becomes | |
1455 | * available on one of the descriptors). | |
1456 | */ | |
489aa2e9 | 1457 | max_fd2 = max_fd; |
c422989b | 1458 | client_wait_until_can_do_something(&readset, &writeset, |
489aa2e9 | 1459 | &max_fd2, &nalloc, rekeying); |
5260325f | 1460 | |
1461 | if (quit_pending) | |
1462 | break; | |
1463 | ||
c422989b | 1464 | /* Do channel operations unless rekeying in progress. */ |
1465 | if (!rekeying) { | |
1466 | channel_after_select(readset, writeset); | |
ffd7b36b | 1467 | if (need_rekeying || packet_need_rekeying()) { |
1468 | debug("need rekeying"); | |
c422989b | 1469 | xxx_kex->done = 0; |
1470 | kex_send_kexinit(xxx_kex); | |
1471 | need_rekeying = 0; | |
1472 | } | |
1473 | } | |
5260325f | 1474 | |
8ce64345 | 1475 | /* Buffer input from the connection. */ |
39929cdb | 1476 | client_process_net_input(readset); |
5260325f | 1477 | |
5e96b616 | 1478 | /* Accept control connections. */ |
1479 | client_process_control(readset); | |
1480 | ||
8ce64345 | 1481 | if (quit_pending) |
1482 | break; | |
1483 | ||
1484 | if (!compat20) { | |
1485 | /* Buffer data from stdin */ | |
39929cdb | 1486 | client_process_input(readset); |
8ce64345 | 1487 | /* |
1488 | * Process output to stdout and stderr. Output to | |
1489 | * the connection is processed elsewhere (above). | |
1490 | */ | |
39929cdb | 1491 | client_process_output(writeset); |
8ce64345 | 1492 | } |
5260325f | 1493 | |
aa3378df | 1494 | /* Send as much buffered packet data as possible to the sender. */ |
39929cdb | 1495 | if (FD_ISSET(connection_out, writeset)) |
5260325f | 1496 | packet_write_poll(); |
1497 | } | |
39929cdb | 1498 | if (readset) |
1499 | xfree(readset); | |
1500 | if (writeset) | |
1501 | xfree(writeset); | |
5260325f | 1502 | |
1503 | /* Terminate the session. */ | |
1504 | ||
1505 | /* Stop watching for window change. */ | |
2c9a4d41 | 1506 | signal(SIGWINCH, SIG_DFL); |
5260325f | 1507 | |
d6746a0b | 1508 | channel_free_all(); |
5260325f | 1509 | |
c9130033 | 1510 | if (have_pty) |
1511 | leave_raw_mode(); | |
89aa792b | 1512 | |
1513 | /* restore blocking io */ | |
1514 | if (!isatty(fileno(stdin))) | |
1515 | unset_nonblock(fileno(stdin)); | |
1516 | if (!isatty(fileno(stdout))) | |
1517 | unset_nonblock(fileno(stdout)); | |
1518 | if (!isatty(fileno(stderr))) | |
1519 | unset_nonblock(fileno(stderr)); | |
1520 | ||
66357af5 | 1521 | /* |
1522 | * If there was no shell or command requested, there will be no remote | |
1523 | * exit status to be returned. In that case, clear error code if the | |
1524 | * connection was deliberately terminated at this end. | |
1525 | */ | |
1526 | if (no_shell_flag && received_signal == SIGTERM) { | |
1527 | received_signal = 0; | |
1528 | exit_status = 0; | |
1529 | } | |
1530 | ||
82de775c | 1531 | if (received_signal) |
010f9726 | 1532 | fatal("Killed by signal %d.", (int) received_signal); |
c9130033 | 1533 | |
1534 | /* | |
1535 | * In interactive mode (with pseudo tty) display a message indicating | |
1536 | * that the connection has been closed. | |
1537 | */ | |
1538 | if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { | |
1539 | snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host); | |
1540 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
1541 | } | |
1542 | ||
5260325f | 1543 | /* Output any buffered data for stdout. */ |
89aa792b | 1544 | while (buffer_len(&stdout_buffer) > 0) { |
1545 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1546 | buffer_len(&stdout_buffer)); |
89aa792b | 1547 | if (len <= 0) { |
5260325f | 1548 | error("Write failed flushing stdout buffer."); |
89aa792b | 1549 | break; |
1550 | } | |
5260325f | 1551 | buffer_consume(&stdout_buffer, len); |
cd332296 | 1552 | stdout_bytes += len; |
8efc0c15 | 1553 | } |
5260325f | 1554 | |
1555 | /* Output any buffered data for stderr. */ | |
89aa792b | 1556 | while (buffer_len(&stderr_buffer) > 0) { |
1557 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1558 | buffer_len(&stderr_buffer)); |
89aa792b | 1559 | if (len <= 0) { |
5260325f | 1560 | error("Write failed flushing stderr buffer."); |
89aa792b | 1561 | break; |
1562 | } | |
5260325f | 1563 | buffer_consume(&stderr_buffer, len); |
cd332296 | 1564 | stderr_bytes += len; |
5260325f | 1565 | } |
1566 | ||
5260325f | 1567 | /* Clear and free any buffers. */ |
1568 | memset(buf, 0, sizeof(buf)); | |
1569 | buffer_free(&stdin_buffer); | |
1570 | buffer_free(&stdout_buffer); | |
1571 | buffer_free(&stderr_buffer); | |
1572 | ||
1573 | /* Report bytes transferred, and transfer rates. */ | |
1574 | total_time = get_current_time() - start_time; | |
1575 | debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds", | |
184eed6a | 1576 | stdin_bytes, stdout_bytes, stderr_bytes, total_time); |
5260325f | 1577 | if (total_time > 0) |
1578 | debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f", | |
184eed6a | 1579 | stdin_bytes / total_time, stdout_bytes / total_time, |
1580 | stderr_bytes / total_time); | |
5260325f | 1581 | |
1582 | /* Return the exit status of the program. */ | |
1583 | debug("Exit status %d", exit_status); | |
1584 | return exit_status; | |
8efc0c15 | 1585 | } |
7368a6c8 | 1586 | |
1587 | /*********/ | |
1588 | ||
396c147e | 1589 | static void |
7819b5c3 | 1590 | client_input_stdout_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1591 | { |
1e3b8b07 | 1592 | u_int data_len; |
7368a6c8 | 1593 | char *data = packet_get_string(&data_len); |
95500969 | 1594 | packet_check_eom(); |
7368a6c8 | 1595 | buffer_append(&stdout_buffer, data, data_len); |
7368a6c8 | 1596 | memset(data, 0, data_len); |
1597 | xfree(data); | |
1598 | } | |
396c147e | 1599 | static void |
7819b5c3 | 1600 | client_input_stderr_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1601 | { |
1e3b8b07 | 1602 | u_int data_len; |
7368a6c8 | 1603 | char *data = packet_get_string(&data_len); |
95500969 | 1604 | packet_check_eom(); |
7368a6c8 | 1605 | buffer_append(&stderr_buffer, data, data_len); |
7368a6c8 | 1606 | memset(data, 0, data_len); |
1607 | xfree(data); | |
1608 | } | |
396c147e | 1609 | static void |
7819b5c3 | 1610 | client_input_exit_status(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1611 | { |
7368a6c8 | 1612 | exit_status = packet_get_int(); |
95500969 | 1613 | packet_check_eom(); |
7368a6c8 | 1614 | /* Acknowledge the exit. */ |
1615 | packet_start(SSH_CMSG_EXIT_CONFIRMATION); | |
1616 | packet_send(); | |
1617 | /* | |
1618 | * Must wait for packet to be sent since we are | |
1619 | * exiting the loop. | |
1620 | */ | |
1621 | packet_write_wait(); | |
1622 | /* Flag that we want to exit. */ | |
1623 | quit_pending = 1; | |
1624 | } | |
c15706e2 | 1625 | static void |
1626 | client_input_agent_open(int type, u_int32_t seq, void *ctxt) | |
1627 | { | |
1628 | Channel *c = NULL; | |
1629 | int remote_id, sock; | |
1630 | ||
1631 | /* Read the remote channel number from the message. */ | |
1632 | remote_id = packet_get_int(); | |
1633 | packet_check_eom(); | |
1634 | ||
1635 | /* | |
1636 | * Get a connection to the local authentication agent (this may again | |
1637 | * get forwarded). | |
1638 | */ | |
1639 | sock = ssh_get_authentication_socket(); | |
1640 | ||
1641 | /* | |
1642 | * If we could not connect the agent, send an error message back to | |
1643 | * the server. This should never happen unless the agent dies, | |
1644 | * because authentication forwarding is only enabled if we have an | |
1645 | * agent. | |
1646 | */ | |
1647 | if (sock >= 0) { | |
1648 | c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, | |
1649 | -1, 0, 0, 0, "authentication agent connection", 1); | |
1650 | c->remote_id = remote_id; | |
1651 | c->force_drain = 1; | |
1652 | } | |
1653 | if (c == NULL) { | |
1654 | packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); | |
1655 | packet_put_int(remote_id); | |
1656 | } else { | |
1657 | /* Send a confirmation to the remote host. */ | |
1658 | debug("Forwarding authentication connection."); | |
1659 | packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1660 | packet_put_int(remote_id); | |
1661 | packet_put_int(c->self); | |
1662 | } | |
1663 | packet_send(); | |
1664 | } | |
7368a6c8 | 1665 | |
396c147e | 1666 | static Channel * |
fa08c86b | 1667 | client_request_forwarded_tcpip(const char *request_type, int rchan) |
1668 | { | |
343288b8 | 1669 | Channel *c = NULL; |
fa08c86b | 1670 | char *listen_address, *originator_address; |
1671 | int listen_port, originator_port; | |
719fc62f | 1672 | int sock; |
fa08c86b | 1673 | |
1674 | /* Get rest of the packet */ | |
1675 | listen_address = packet_get_string(NULL); | |
1676 | listen_port = packet_get_int(); | |
1677 | originator_address = packet_get_string(NULL); | |
1678 | originator_port = packet_get_int(); | |
95500969 | 1679 | packet_check_eom(); |
fa08c86b | 1680 | |
1681 | debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d", | |
1682 | listen_address, listen_port, originator_address, originator_port); | |
1683 | ||
b3f8a79c | 1684 | sock = channel_connect_by_listen_address(listen_port); |
719fc62f | 1685 | if (sock < 0) { |
1686 | xfree(originator_address); | |
1687 | xfree(listen_address); | |
1688 | return NULL; | |
1689 | } | |
1690 | c = channel_new("forwarded-tcpip", | |
1691 | SSH_CHANNEL_CONNECTING, sock, sock, -1, | |
1692 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, | |
0d942eff | 1693 | originator_address, 1); |
fa08c86b | 1694 | xfree(originator_address); |
1695 | xfree(listen_address); | |
1696 | return c; | |
1697 | } | |
1698 | ||
343288b8 | 1699 | static Channel * |
fa08c86b | 1700 | client_request_x11(const char *request_type, int rchan) |
1701 | { | |
1702 | Channel *c = NULL; | |
1703 | char *originator; | |
1704 | int originator_port; | |
719fc62f | 1705 | int sock; |
fa08c86b | 1706 | |
1707 | if (!options.forward_x11) { | |
1708 | error("Warning: ssh server tried X11 forwarding."); | |
1908529f | 1709 | error("Warning: this is probably a break-in attempt by a malicious server."); |
fa08c86b | 1710 | return NULL; |
1711 | } | |
1712 | originator = packet_get_string(NULL); | |
1713 | if (datafellows & SSH_BUG_X11FWD) { | |
1714 | debug2("buggy server: x11 request w/o originator_port"); | |
1715 | originator_port = 0; | |
1716 | } else { | |
1717 | originator_port = packet_get_int(); | |
1718 | } | |
95500969 | 1719 | packet_check_eom(); |
fa08c86b | 1720 | /* XXX check permission */ |
865ac82e | 1721 | debug("client_request_x11: request from %s %d", originator, |
1722 | originator_port); | |
719fc62f | 1723 | xfree(originator); |
fa08c86b | 1724 | sock = x11_connect_display(); |
719fc62f | 1725 | if (sock < 0) |
1726 | return NULL; | |
1727 | c = channel_new("x11", | |
1728 | SSH_CHANNEL_X11_OPEN, sock, sock, -1, | |
0d942eff | 1729 | CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); |
a5f82435 | 1730 | c->force_drain = 1; |
fa08c86b | 1731 | return c; |
1732 | } | |
1733 | ||
343288b8 | 1734 | static Channel * |
fa08c86b | 1735 | client_request_agent(const char *request_type, int rchan) |
1736 | { | |
1737 | Channel *c = NULL; | |
719fc62f | 1738 | int sock; |
fa08c86b | 1739 | |
1740 | if (!options.forward_agent) { | |
1741 | error("Warning: ssh server tried agent forwarding."); | |
1908529f | 1742 | error("Warning: this is probably a break-in attempt by a malicious server."); |
fa08c86b | 1743 | return NULL; |
1744 | } | |
1745 | sock = ssh_get_authentication_socket(); | |
719fc62f | 1746 | if (sock < 0) |
1747 | return NULL; | |
1748 | c = channel_new("authentication agent connection", | |
1749 | SSH_CHANNEL_OPEN, sock, sock, -1, | |
1750 | CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, | |
0d942eff | 1751 | "authentication agent connection", 1); |
a5f82435 | 1752 | c->force_drain = 1; |
fa08c86b | 1753 | return c; |
1754 | } | |
1755 | ||
0b242b12 | 1756 | /* XXXX move to generic input handler */ |
396c147e | 1757 | static void |
7819b5c3 | 1758 | client_input_channel_open(int type, u_int32_t seq, void *ctxt) |
0b242b12 | 1759 | { |
1760 | Channel *c = NULL; | |
1761 | char *ctype; | |
0b242b12 | 1762 | int rchan; |
f91d9a89 | 1763 | u_int rmaxpack, rwindow, len; |
0b242b12 | 1764 | |
1765 | ctype = packet_get_string(&len); | |
1766 | rchan = packet_get_int(); | |
1767 | rwindow = packet_get_int(); | |
1768 | rmaxpack = packet_get_int(); | |
1769 | ||
1d1ffb87 | 1770 | debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
0b242b12 | 1771 | ctype, rchan, rwindow, rmaxpack); |
1772 | ||
fa08c86b | 1773 | if (strcmp(ctype, "forwarded-tcpip") == 0) { |
1774 | c = client_request_forwarded_tcpip(ctype, rchan); | |
1775 | } else if (strcmp(ctype, "x11") == 0) { | |
1776 | c = client_request_x11(ctype, rchan); | |
1777 | } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { | |
1778 | c = client_request_agent(ctype, rchan); | |
0b242b12 | 1779 | } |
1780 | /* XXX duplicate : */ | |
1781 | if (c != NULL) { | |
1782 | debug("confirm %s", ctype); | |
1783 | c->remote_id = rchan; | |
1784 | c->remote_window = rwindow; | |
1785 | c->remote_maxpacket = rmaxpack; | |
a01a10dd | 1786 | if (c->type != SSH_CHANNEL_CONNECTING) { |
1787 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1788 | packet_put_int(c->remote_id); | |
1789 | packet_put_int(c->self); | |
1790 | packet_put_int(c->local_window); | |
1791 | packet_put_int(c->local_maxpacket); | |
1792 | packet_send(); | |
1793 | } | |
0b242b12 | 1794 | } else { |
1795 | debug("failure %s", ctype); | |
1796 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); | |
1797 | packet_put_int(rchan); | |
1798 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 1799 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
a01a10dd | 1800 | packet_put_cstring("open failed"); |
fbe90f7b | 1801 | packet_put_cstring(""); |
1802 | } | |
0b242b12 | 1803 | packet_send(); |
1804 | } | |
1805 | xfree(ctype); | |
1806 | } | |
396c147e | 1807 | static void |
7819b5c3 | 1808 | client_input_channel_req(int type, u_int32_t seq, void *ctxt) |
1fc8ccdf | 1809 | { |
1810 | Channel *c = NULL; | |
5e96b616 | 1811 | int exitval, id, reply, success = 0; |
1fc8ccdf | 1812 | char *rtype; |
1813 | ||
1814 | id = packet_get_int(); | |
1815 | rtype = packet_get_string(NULL); | |
1816 | reply = packet_get_char(); | |
1817 | ||
1818 | debug("client_input_channel_req: channel %d rtype %s reply %d", | |
1819 | id, rtype, reply); | |
1820 | ||
13de3560 | 1821 | if (id == -1) { |
1822 | error("client_input_channel_req: request for channel -1"); | |
1823 | } else if ((c = channel_lookup(id)) == NULL) { | |
1fc8ccdf | 1824 | error("client_input_channel_req: channel %d: unknown channel", id); |
1825 | } else if (strcmp(rtype, "exit-status") == 0) { | |
5e96b616 | 1826 | exitval = packet_get_int(); |
1827 | if (id == session_ident) { | |
1828 | success = 1; | |
1829 | exit_status = exitval; | |
1830 | } else if (c->ctl_fd == -1) { | |
1831 | error("client_input_channel_req: unexpected channel %d", | |
1832 | session_ident); | |
1833 | } else { | |
1834 | atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval)); | |
1835 | success = 1; | |
1836 | } | |
95500969 | 1837 | packet_check_eom(); |
1fc8ccdf | 1838 | } |
1839 | if (reply) { | |
1840 | packet_start(success ? | |
1841 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
13de3560 | 1842 | packet_put_int(id); |
1fc8ccdf | 1843 | packet_send(); |
1844 | } | |
1845 | xfree(rtype); | |
1846 | } | |
3d209bbe | 1847 | static void |
1848 | client_input_global_request(int type, u_int32_t seq, void *ctxt) | |
1849 | { | |
1850 | char *rtype; | |
1851 | int want_reply; | |
1852 | int success = 0; | |
1853 | ||
1854 | rtype = packet_get_string(NULL); | |
1855 | want_reply = packet_get_char(); | |
5d8d32a3 | 1856 | debug("client_input_global_request: rtype %s want_reply %d", |
1857 | rtype, want_reply); | |
3d209bbe | 1858 | if (want_reply) { |
1859 | packet_start(success ? | |
1860 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
1861 | packet_send(); | |
1862 | packet_write_wait(); | |
1863 | } | |
1864 | xfree(rtype); | |
1865 | } | |
0b242b12 | 1866 | |
5e96b616 | 1867 | void |
f2107e97 | 1868 | client_session2_setup(int id, int want_tty, int want_subsystem, |
1786be35 | 1869 | const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env, |
5e96b616 | 1870 | dispatch_fn *subsys_repl) |
1871 | { | |
1872 | int len; | |
2c9a4d41 | 1873 | Channel *c = NULL; |
5e96b616 | 1874 | |
1875 | debug2("%s: id %d", __func__, id); | |
1876 | ||
2c9a4d41 | 1877 | if ((c = channel_lookup(id)) == NULL) |
1878 | fatal("client_session2_setup: channel %d: unknown channel", id); | |
1879 | ||
5e96b616 | 1880 | if (want_tty) { |
1881 | struct winsize ws; | |
1882 | struct termios tio; | |
1883 | ||
1884 | /* Store window size in the packet. */ | |
1885 | if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) | |
1886 | memset(&ws, 0, sizeof(ws)); | |
1887 | ||
1888 | channel_request_start(id, "pty-req", 0); | |
1889 | packet_put_cstring(term != NULL ? term : ""); | |
148de80c | 1890 | packet_put_int((u_int)ws.ws_col); |
1891 | packet_put_int((u_int)ws.ws_row); | |
1892 | packet_put_int((u_int)ws.ws_xpixel); | |
1893 | packet_put_int((u_int)ws.ws_ypixel); | |
5e96b616 | 1894 | tio = get_saved_tio(); |
1895 | tty_make_modes(-1, tiop != NULL ? tiop : &tio); | |
1896 | packet_send(); | |
1897 | /* XXX wait for reply */ | |
2c9a4d41 | 1898 | c->client_tty = 1; |
5e96b616 | 1899 | } |
1900 | ||
1901 | /* Transfer any environment variables from client to server */ | |
1786be35 | 1902 | if (options.num_send_env != 0 && env != NULL) { |
5e96b616 | 1903 | int i, j, matched; |
5e96b616 | 1904 | char *name, *val; |
1905 | ||
1906 | debug("Sending environment."); | |
1786be35 | 1907 | for (i = 0; env[i] != NULL; i++) { |
5e96b616 | 1908 | /* Split */ |
1786be35 | 1909 | name = xstrdup(env[i]); |
5e96b616 | 1910 | if ((val = strchr(name, '=')) == NULL) { |
8c4bd764 | 1911 | xfree(name); |
5e96b616 | 1912 | continue; |
1913 | } | |
1914 | *val++ = '\0'; | |
1915 | ||
1916 | matched = 0; | |
1917 | for (j = 0; j < options.num_send_env; j++) { | |
1918 | if (match_pattern(name, options.send_env[j])) { | |
1919 | matched = 1; | |
1920 | break; | |
1921 | } | |
1922 | } | |
1923 | if (!matched) { | |
1924 | debug3("Ignored env %s", name); | |
8c4bd764 | 1925 | xfree(name); |
5e96b616 | 1926 | continue; |
1927 | } | |
1928 | ||
1929 | debug("Sending env %s = %s", name, val); | |
1930 | channel_request_start(id, "env", 0); | |
1931 | packet_put_cstring(name); | |
1932 | packet_put_cstring(val); | |
1933 | packet_send(); | |
8c4bd764 | 1934 | xfree(name); |
5e96b616 | 1935 | } |
1936 | } | |
1937 | ||
1938 | len = buffer_len(cmd); | |
1939 | if (len > 0) { | |
1940 | if (len > 900) | |
1941 | len = 900; | |
1942 | if (want_subsystem) { | |
1943 | debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd)); | |
1944 | channel_request_start(id, "subsystem", subsys_repl != NULL); | |
1945 | if (subsys_repl != NULL) { | |
1946 | /* register callback for reply */ | |
1947 | /* XXX we assume that client_loop has already been called */ | |
1948 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl); | |
1949 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl); | |
1950 | } | |
1951 | } else { | |
1952 | debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd)); | |
1953 | channel_request_start(id, "exec", 0); | |
1954 | } | |
1955 | packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); | |
1956 | packet_send(); | |
1957 | } else { | |
1958 | channel_request_start(id, "shell", 0); | |
1959 | packet_send(); | |
1960 | } | |
1961 | } | |
1962 | ||
396c147e | 1963 | static void |
5ca51e19 | 1964 | client_init_dispatch_20(void) |
8ce64345 | 1965 | { |
7a37c112 | 1966 | dispatch_init(&dispatch_protocol_error); |
e0ae8728 | 1967 | |
8ce64345 | 1968 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
1969 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
1970 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
1971 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
0b242b12 | 1972 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
8ce64345 | 1973 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
1974 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1fc8ccdf | 1975 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
8ce64345 | 1976 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
3d209bbe | 1977 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); |
7a37c112 | 1978 | |
1979 | /* rekeying */ | |
1980 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e0ae8728 | 1981 | |
1982 | /* global request reply messages */ | |
1983 | dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); | |
1984 | dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); | |
8ce64345 | 1985 | } |
396c147e | 1986 | static void |
5ca51e19 | 1987 | client_init_dispatch_13(void) |
7368a6c8 | 1988 | { |
1989 | dispatch_init(NULL); | |
1990 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
1991 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
1992 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
7368a6c8 | 1993 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
1994 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1995 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
7368a6c8 | 1996 | dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
1997 | dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); | |
1998 | dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); | |
a22aff1f | 1999 | |
2000 | dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? | |
c15706e2 | 2001 | &client_input_agent_open : &deny_input_open); |
a22aff1f | 2002 | dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
2003 | &x11_input_open : &deny_input_open); | |
7368a6c8 | 2004 | } |
396c147e | 2005 | static void |
5ca51e19 | 2006 | client_init_dispatch_15(void) |
7368a6c8 | 2007 | { |
2008 | client_init_dispatch_13(); | |
2009 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
2010 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); | |
2011 | } | |
eea46d13 | 2012 | static void |
5ca51e19 | 2013 | client_init_dispatch(void) |
7368a6c8 | 2014 | { |
8ce64345 | 2015 | if (compat20) |
2016 | client_init_dispatch_20(); | |
2017 | else if (compat13) | |
7368a6c8 | 2018 | client_init_dispatch_13(); |
2019 | else | |
2020 | client_init_dispatch_15(); | |
2021 | } | |
82de775c | 2022 | |
2023 | /* client specific fatal cleanup */ | |
2024 | void | |
2362db19 | 2025 | cleanup_exit(int i) |
82de775c | 2026 | { |
82de775c | 2027 | leave_raw_mode(); |
2028 | leave_non_blocking(); | |
5e96b616 | 2029 | if (options.control_path != NULL && control_fd != -1) |
2030 | unlink(options.control_path); | |
2362db19 | 2031 | _exit(i); |
82de775c | 2032 | } |