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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
bcbf86ec | 5 | * The main loop for the interactive session (client side). |
6ae2364d | 6 | * |
bcbf86ec | 7 | * As far as I am concerned, the code I have written for this software |
8 | * can be used freely for any purpose. Any derived versions of this | |
9 | * software must be clearly marked as such, and if the derived work is | |
10 | * incompatible with the protocol description in the RFC file, it must be | |
11 | * called by a name other than "ssh" or "Secure Shell". | |
6ae2364d | 12 | * |
6ae2364d | 13 | * |
bcbf86ec | 14 | * Copyright (c) 1999 Theo de Raadt. All rights reserved. |
15 | * | |
16 | * Redistribution and use in source and binary forms, with or without | |
17 | * modification, are permitted provided that the following conditions | |
18 | * are met: | |
19 | * 1. Redistributions of source code must retain the above copyright | |
20 | * notice, this list of conditions and the following disclaimer. | |
21 | * 2. Redistributions in binary form must reproduce the above copyright | |
22 | * notice, this list of conditions and the following disclaimer in the | |
23 | * documentation and/or other materials provided with the distribution. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
26 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
27 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
28 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
29 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
30 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
34 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
6ae2364d | 36 | * |
8ce64345 | 37 | * SSH2 support added by Markus Friedl. |
a96070d4 | 38 | * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 39 | * |
40 | * Redistribution and use in source and binary forms, with or without | |
41 | * modification, are permitted provided that the following conditions | |
42 | * are met: | |
43 | * 1. Redistributions of source code must retain the above copyright | |
44 | * notice, this list of conditions and the following disclaimer. | |
45 | * 2. Redistributions in binary form must reproduce the above copyright | |
46 | * notice, this list of conditions and the following disclaimer in the | |
47 | * documentation and/or other materials provided with the distribution. | |
48 | * | |
49 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
50 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
51 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
52 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
53 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
54 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
55 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
56 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
57 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
58 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
5260325f | 59 | */ |
8efc0c15 | 60 | |
61 | #include "includes.h" | |
bd7c69ea | 62 | |
4095f623 | 63 | #include <sys/types.h> |
64 | #ifdef HAVE_SYS_STAT_H | |
65 | # include <sys/stat.h> | |
66 | #endif | |
bd7c69ea | 67 | #include <sys/ioctl.h> |
1d3e026f | 68 | |
b6438382 | 69 | #include <ctype.h> |
b5b88c19 | 70 | #ifdef HAVE_PATHS_H |
a75f5360 | 71 | #include <paths.h> |
b5b88c19 | 72 | #endif |
ada68823 | 73 | #include <signal.h> |
1d3e026f | 74 | #include <termios.h> |
8efc0c15 | 75 | |
8efc0c15 | 76 | #include "ssh.h" |
42f11eb2 | 77 | #include "ssh1.h" |
78 | #include "ssh2.h" | |
79 | #include "xmalloc.h" | |
8efc0c15 | 80 | #include "packet.h" |
81 | #include "buffer.h" | |
7368a6c8 | 82 | #include "compat.h" |
a5efa1bb | 83 | #include "channels.h" |
7368a6c8 | 84 | #include "dispatch.h" |
2e73a022 | 85 | #include "buffer.h" |
86 | #include "bufaux.h" | |
fa08c86b | 87 | #include "key.h" |
e092ce67 | 88 | #include "kex.h" |
42f11eb2 | 89 | #include "log.h" |
90 | #include "readconf.h" | |
b5c334cc | 91 | #include "clientloop.h" |
ceec33f3 | 92 | #include "sshconnect.h" |
42f11eb2 | 93 | #include "authfd.h" |
94 | #include "atomicio.h" | |
07d80252 | 95 | #include "sshpty.h" |
e968270c | 96 | #include "misc.h" |
5e96b616 | 97 | #include "monitor_fdpass.h" |
98 | #include "match.h" | |
99 | #include "msg.h" | |
a22aff1f | 100 | |
101 | /* import options */ | |
102 | extern Options options; | |
103 | ||
8efc0c15 | 104 | /* Flag indicating that stdin should be redirected from /dev/null. */ |
105 | extern int stdin_null_flag; | |
106 | ||
66357af5 | 107 | /* Flag indicating that no shell has been requested */ |
108 | extern int no_shell_flag; | |
109 | ||
5e96b616 | 110 | /* Control socket */ |
111 | extern int control_fd; | |
112 | ||
aa3378df | 113 | /* |
114 | * Name of the host we are connecting to. This is the name given on the | |
115 | * command line, or the HostName specified for the user-supplied name in a | |
116 | * configuration file. | |
117 | */ | |
8efc0c15 | 118 | extern char *host; |
119 | ||
aa3378df | 120 | /* |
121 | * Flag to indicate that we have received a window change signal which has | |
122 | * not yet been processed. This will cause a message indicating the new | |
123 | * window size to be sent to the server a little later. This is volatile | |
124 | * because this is updated in a signal handler. | |
125 | */ | |
7a934d1b | 126 | static volatile sig_atomic_t received_window_change_signal = 0; |
127 | static volatile sig_atomic_t received_signal = 0; | |
8efc0c15 | 128 | |
7b9b0103 | 129 | /* Flag indicating whether the user's terminal is in non-blocking mode. */ |
8efc0c15 | 130 | static int in_non_blocking_mode = 0; |
131 | ||
132 | /* Common data for the client loop code. */ | |
2e73a022 | 133 | static int quit_pending; /* Set to non-zero to quit the client loop. */ |
134 | static int escape_char; /* Escape character. */ | |
5260325f | 135 | static int escape_pending; /* Last character was the escape character */ |
136 | static int last_was_cr; /* Last character was a newline. */ | |
137 | static int exit_status; /* Used to store the exit status of the command. */ | |
138 | static int stdin_eof; /* EOF has been encountered on standard error. */ | |
139 | static Buffer stdin_buffer; /* Buffer for stdin data. */ | |
140 | static Buffer stdout_buffer; /* Buffer for stdout data. */ | |
141 | static Buffer stderr_buffer; /* Buffer for stderr data. */ | |
1e3b8b07 | 142 | static u_long stdin_bytes, stdout_bytes, stderr_bytes; |
143 | static u_int buffer_high;/* Soft max buffer size. */ | |
5260325f | 144 | static int connection_in; /* Connection to server (input). */ |
145 | static int connection_out; /* Connection to server (output). */ | |
c422989b | 146 | static int need_rekeying; /* Set to non-zero if rekeying is requested. */ |
eb0dd41f | 147 | static int session_closed = 0; /* In SSH2: login session closed. */ |
5d8d32a3 | 148 | static int server_alive_timeouts = 0; |
8efc0c15 | 149 | |
396c147e | 150 | static void client_init_dispatch(void); |
8ce64345 | 151 | int session_ident = -1; |
152 | ||
5e96b616 | 153 | struct confirm_ctx { |
154 | int want_tty; | |
155 | int want_subsys; | |
ef07103c | 156 | int want_x_fwd; |
157 | int want_agent_fwd; | |
5e96b616 | 158 | Buffer cmd; |
159 | char *term; | |
160 | struct termios tio; | |
1786be35 | 161 | char **env; |
5e96b616 | 162 | }; |
163 | ||
e092ce67 | 164 | /*XXX*/ |
165 | extern Kex *xxx_kex; | |
166 | ||
5e96b616 | 167 | void ssh_process_session2_setup(int, int, int, Buffer *); |
168 | ||
8efc0c15 | 169 | /* Restores stdin to blocking mode. */ |
170 | ||
396c147e | 171 | static void |
5ca51e19 | 172 | leave_non_blocking(void) |
8efc0c15 | 173 | { |
5260325f | 174 | if (in_non_blocking_mode) { |
1b273ece | 175 | unset_nonblock(fileno(stdin)); |
5260325f | 176 | in_non_blocking_mode = 0; |
5260325f | 177 | } |
8efc0c15 | 178 | } |
179 | ||
5260325f | 180 | /* Puts stdin terminal in non-blocking mode. */ |
181 | ||
396c147e | 182 | static void |
5ca51e19 | 183 | enter_non_blocking(void) |
8efc0c15 | 184 | { |
5260325f | 185 | in_non_blocking_mode = 1; |
170694d7 | 186 | set_nonblock(fileno(stdin)); |
8efc0c15 | 187 | } |
188 | ||
aa3378df | 189 | /* |
190 | * Signal handler for the window change signal (SIGWINCH). This just sets a | |
191 | * flag indicating that the window has changed. | |
192 | */ | |
3efa8ea9 | 193 | /*ARGSUSED */ |
396c147e | 194 | static void |
5260325f | 195 | window_change_handler(int sig) |
8efc0c15 | 196 | { |
5260325f | 197 | received_window_change_signal = 1; |
198 | signal(SIGWINCH, window_change_handler); | |
8efc0c15 | 199 | } |
200 | ||
aa3378df | 201 | /* |
202 | * Signal handler for signals that cause the program to terminate. These | |
203 | * signals must be trapped to restore terminal modes. | |
204 | */ | |
3efa8ea9 | 205 | /*ARGSUSED */ |
396c147e | 206 | static void |
5260325f | 207 | signal_handler(int sig) |
8efc0c15 | 208 | { |
c9130033 | 209 | received_signal = sig; |
210 | quit_pending = 1; | |
8efc0c15 | 211 | } |
212 | ||
aa3378df | 213 | /* |
214 | * Returns current time in seconds from Jan 1, 1970 with the maximum | |
215 | * available resolution. | |
216 | */ | |
8efc0c15 | 217 | |
396c147e | 218 | static double |
5ca51e19 | 219 | get_current_time(void) |
8efc0c15 | 220 | { |
5260325f | 221 | struct timeval tv; |
222 | gettimeofday(&tv, NULL); | |
223 | return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0; | |
8efc0c15 | 224 | } |
225 | ||
9bf083eb | 226 | #define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1" |
227 | void | |
228 | client_x11_get_proto(const char *display, const char *xauth_path, | |
229 | u_int trusted, char **_proto, char **_data) | |
230 | { | |
231 | char cmd[1024]; | |
232 | char line[512]; | |
233 | char xdisplay[512]; | |
234 | static char proto[512], data[512]; | |
235 | FILE *f; | |
236 | int got_data = 0, generated = 0, do_unlink = 0, i; | |
237 | char *xauthdir, *xauthfile; | |
238 | struct stat st; | |
239 | ||
240 | xauthdir = xauthfile = NULL; | |
241 | *_proto = proto; | |
242 | *_data = data; | |
243 | proto[0] = data[0] = '\0'; | |
244 | ||
245 | if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) { | |
246 | debug("No xauth program."); | |
247 | } else { | |
248 | if (display == NULL) { | |
249 | debug("x11_get_proto: DISPLAY not set"); | |
250 | return; | |
251 | } | |
252 | /* | |
253 | * Handle FamilyLocal case where $DISPLAY does | |
254 | * not match an authorization entry. For this we | |
255 | * just try "xauth list unix:displaynum.screennum". | |
256 | * XXX: "localhost" match to determine FamilyLocal | |
257 | * is not perfect. | |
258 | */ | |
259 | if (strncmp(display, "localhost:", 10) == 0) { | |
260 | snprintf(xdisplay, sizeof(xdisplay), "unix:%s", | |
261 | display + 10); | |
262 | display = xdisplay; | |
263 | } | |
264 | if (trusted == 0) { | |
265 | xauthdir = xmalloc(MAXPATHLEN); | |
266 | xauthfile = xmalloc(MAXPATHLEN); | |
267 | strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN); | |
268 | if (mkdtemp(xauthdir) != NULL) { | |
269 | do_unlink = 1; | |
270 | snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile", | |
271 | xauthdir); | |
272 | snprintf(cmd, sizeof(cmd), | |
273 | "%s -f %s generate %s " SSH_X11_PROTO | |
274 | " untrusted timeout 1200 2>" _PATH_DEVNULL, | |
275 | xauth_path, xauthfile, display); | |
276 | debug2("x11_get_proto: %s", cmd); | |
277 | if (system(cmd) == 0) | |
278 | generated = 1; | |
279 | } | |
280 | } | |
281 | snprintf(cmd, sizeof(cmd), | |
b5443199 | 282 | "%s %s%s list %s 2>" _PATH_DEVNULL, |
9bf083eb | 283 | xauth_path, |
284 | generated ? "-f " : "" , | |
285 | generated ? xauthfile : "", | |
286 | display); | |
287 | debug2("x11_get_proto: %s", cmd); | |
288 | f = popen(cmd, "r"); | |
289 | if (f && fgets(line, sizeof(line), f) && | |
290 | sscanf(line, "%*s %511s %511s", proto, data) == 2) | |
291 | got_data = 1; | |
292 | if (f) | |
293 | pclose(f); | |
294 | } | |
295 | ||
296 | if (do_unlink) { | |
297 | unlink(xauthfile); | |
298 | rmdir(xauthdir); | |
299 | } | |
300 | if (xauthdir) | |
301 | xfree(xauthdir); | |
302 | if (xauthfile) | |
303 | xfree(xauthfile); | |
304 | ||
305 | /* | |
306 | * If we didn't get authentication data, just make up some | |
307 | * data. The forwarding code will check the validity of the | |
308 | * response anyway, and substitute this data. The X11 | |
309 | * server, however, will ignore this fake data and use | |
310 | * whatever authentication mechanisms it was using otherwise | |
311 | * for the local connection. | |
312 | */ | |
313 | if (!got_data) { | |
314 | u_int32_t rnd = 0; | |
315 | ||
316 | logit("Warning: No xauth data; " | |
317 | "using fake authentication data for X11 forwarding."); | |
318 | strlcpy(proto, SSH_X11_PROTO, sizeof proto); | |
319 | for (i = 0; i < 16; i++) { | |
320 | if (i % 4 == 0) | |
321 | rnd = arc4random(); | |
322 | snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", | |
323 | rnd & 0xff); | |
324 | rnd >>= 8; | |
325 | } | |
326 | } | |
327 | } | |
328 | ||
aa3378df | 329 | /* |
330 | * This is called when the interactive is entered. This checks if there is | |
331 | * an EOF coming on stdin. We must check this explicitly, as select() does | |
332 | * not appear to wake up when redirecting from /dev/null. | |
333 | */ | |
8efc0c15 | 334 | |
396c147e | 335 | static void |
5ca51e19 | 336 | client_check_initial_eof_on_stdin(void) |
8efc0c15 | 337 | { |
5260325f | 338 | int len; |
339 | char buf[1]; | |
340 | ||
aa3378df | 341 | /* |
342 | * If standard input is to be "redirected from /dev/null", we simply | |
343 | * mark that we have seen an EOF and send an EOF message to the | |
344 | * server. Otherwise, we try to read a single character; it appears | |
345 | * that for some files, such /dev/null, select() never wakes up for | |
346 | * read for this descriptor, which means that we never get EOF. This | |
347 | * way we will get the EOF if stdin comes from /dev/null or similar. | |
348 | */ | |
5260325f | 349 | if (stdin_null_flag) { |
350 | /* Fake EOF on stdin. */ | |
351 | debug("Sending eof."); | |
352 | stdin_eof = 1; | |
353 | packet_start(SSH_CMSG_EOF); | |
354 | packet_send(); | |
355 | } else { | |
5260325f | 356 | enter_non_blocking(); |
357 | ||
358 | /* Check for immediate EOF on stdin. */ | |
359 | len = read(fileno(stdin), buf, 1); | |
360 | if (len == 0) { | |
aa3378df | 361 | /* EOF. Record that we have seen it and send EOF to server. */ |
5260325f | 362 | debug("Sending eof."); |
363 | stdin_eof = 1; | |
364 | packet_start(SSH_CMSG_EOF); | |
365 | packet_send(); | |
366 | } else if (len > 0) { | |
aa3378df | 367 | /* |
368 | * Got data. We must store the data in the buffer, | |
369 | * and also process it as an escape character if | |
370 | * appropriate. | |
371 | */ | |
1e3b8b07 | 372 | if ((u_char) buf[0] == escape_char) |
5260325f | 373 | escape_pending = 1; |
7e8911cd | 374 | else |
5260325f | 375 | buffer_append(&stdin_buffer, buf, 1); |
5260325f | 376 | } |
5260325f | 377 | leave_non_blocking(); |
8efc0c15 | 378 | } |
8efc0c15 | 379 | } |
380 | ||
8efc0c15 | 381 | |
aa3378df | 382 | /* |
383 | * Make packets from buffered stdin data, and buffer them for sending to the | |
384 | * connection. | |
385 | */ | |
8efc0c15 | 386 | |
396c147e | 387 | static void |
5ca51e19 | 388 | client_make_packets_from_stdin_data(void) |
8efc0c15 | 389 | { |
1e3b8b07 | 390 | u_int len; |
5260325f | 391 | |
392 | /* Send buffered stdin data to the server. */ | |
393 | while (buffer_len(&stdin_buffer) > 0 && | |
184eed6a | 394 | packet_not_very_much_data_to_write()) { |
5260325f | 395 | len = buffer_len(&stdin_buffer); |
396 | /* Keep the packets at reasonable size. */ | |
397 | if (len > packet_get_maxsize()) | |
398 | len = packet_get_maxsize(); | |
399 | packet_start(SSH_CMSG_STDIN_DATA); | |
400 | packet_put_string(buffer_ptr(&stdin_buffer), len); | |
401 | packet_send(); | |
402 | buffer_consume(&stdin_buffer, len); | |
7e8911cd | 403 | stdin_bytes += len; |
5260325f | 404 | /* If we have a pending EOF, send it now. */ |
405 | if (stdin_eof && buffer_len(&stdin_buffer) == 0) { | |
406 | packet_start(SSH_CMSG_EOF); | |
407 | packet_send(); | |
408 | } | |
8efc0c15 | 409 | } |
8efc0c15 | 410 | } |
411 | ||
aa3378df | 412 | /* |
413 | * Checks if the client window has changed, and sends a packet about it to | |
414 | * the server if so. The actual change is detected elsewhere (by a software | |
415 | * interrupt on Unix); this just checks the flag and sends a message if | |
416 | * appropriate. | |
417 | */ | |
8efc0c15 | 418 | |
396c147e | 419 | static void |
5ca51e19 | 420 | client_check_window_change(void) |
8efc0c15 | 421 | { |
8ce64345 | 422 | struct winsize ws; |
423 | ||
424 | if (! received_window_change_signal) | |
425 | return; | |
426 | /** XXX race */ | |
427 | received_window_change_signal = 0; | |
428 | ||
de273eef | 429 | debug2("client_check_window_change: changed"); |
8ce64345 | 430 | |
431 | if (compat20) { | |
5e96b616 | 432 | channel_send_window_changes(); |
8ce64345 | 433 | } else { |
5e96b616 | 434 | if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
435 | return; | |
8ce64345 | 436 | packet_start(SSH_CMSG_WINDOW_SIZE); |
148de80c | 437 | packet_put_int((u_int)ws.ws_row); |
438 | packet_put_int((u_int)ws.ws_col); | |
439 | packet_put_int((u_int)ws.ws_xpixel); | |
440 | packet_put_int((u_int)ws.ws_ypixel); | |
8ce64345 | 441 | packet_send(); |
8efc0c15 | 442 | } |
8efc0c15 | 443 | } |
444 | ||
5d8d32a3 | 445 | static void |
446 | client_global_request_reply(int type, u_int32_t seq, void *ctxt) | |
447 | { | |
448 | server_alive_timeouts = 0; | |
449 | client_global_request_reply_fwd(type, seq, ctxt); | |
450 | } | |
451 | ||
452 | static void | |
453 | server_alive_check(void) | |
454 | { | |
455 | if (++server_alive_timeouts > options.server_alive_count_max) | |
456 | packet_disconnect("Timeout, server not responding."); | |
457 | packet_start(SSH2_MSG_GLOBAL_REQUEST); | |
458 | packet_put_cstring("keepalive@openssh.com"); | |
459 | packet_put_char(1); /* boolean: want reply */ | |
460 | packet_send(); | |
461 | } | |
462 | ||
aa3378df | 463 | /* |
464 | * Waits until the client can do something (some data becomes available on | |
465 | * one of the file descriptors). | |
466 | */ | |
396c147e | 467 | static void |
39929cdb | 468 | client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
9a995072 | 469 | int *maxfdp, u_int *nallocp, int rekeying) |
8efc0c15 | 470 | { |
5d8d32a3 | 471 | struct timeval tv, *tvp; |
472 | int ret; | |
473 | ||
39929cdb | 474 | /* Add any selections by the channel mechanism. */ |
489aa2e9 | 475 | channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying); |
5260325f | 476 | |
8ce64345 | 477 | if (!compat20) { |
478 | /* Read from the connection, unless our buffers are full. */ | |
479 | if (buffer_len(&stdout_buffer) < buffer_high && | |
480 | buffer_len(&stderr_buffer) < buffer_high && | |
481 | channel_not_very_much_buffered_data()) | |
39929cdb | 482 | FD_SET(connection_in, *readsetp); |
8ce64345 | 483 | /* |
484 | * Read from stdin, unless we have seen EOF or have very much | |
485 | * buffered data to send to the server. | |
486 | */ | |
487 | if (!stdin_eof && packet_not_very_much_data_to_write()) | |
39929cdb | 488 | FD_SET(fileno(stdin), *readsetp); |
8ce64345 | 489 | |
490 | /* Select stdout/stderr if have data in buffer. */ | |
491 | if (buffer_len(&stdout_buffer) > 0) | |
39929cdb | 492 | FD_SET(fileno(stdout), *writesetp); |
8ce64345 | 493 | if (buffer_len(&stderr_buffer) > 0) |
39929cdb | 494 | FD_SET(fileno(stderr), *writesetp); |
8ce64345 | 495 | } else { |
24b6b45f | 496 | /* channel_prepare_select could have closed the last channel */ |
fd6cfbaf | 497 | if (session_closed && !channel_still_open() && |
498 | !packet_have_data_to_write()) { | |
499 | /* clear mask since we did not call select() */ | |
b3ad8fe6 | 500 | memset(*readsetp, 0, *nallocp); |
501 | memset(*writesetp, 0, *nallocp); | |
fd6cfbaf | 502 | return; |
24b6b45f | 503 | } else { |
504 | FD_SET(connection_in, *readsetp); | |
505 | } | |
8ce64345 | 506 | } |
5260325f | 507 | |
5260325f | 508 | /* Select server connection if have data to write to the server. */ |
509 | if (packet_have_data_to_write()) | |
39929cdb | 510 | FD_SET(connection_out, *writesetp); |
5260325f | 511 | |
5e96b616 | 512 | if (control_fd != -1) |
513 | FD_SET(control_fd, *readsetp); | |
514 | ||
aa3378df | 515 | /* |
516 | * Wait for something to happen. This will suspend the process until | |
517 | * some selected descriptor can be read, written, or has some other | |
5d8d32a3 | 518 | * event pending. |
aa3378df | 519 | */ |
5260325f | 520 | |
5d8d32a3 | 521 | if (options.server_alive_interval == 0 || !compat20) |
522 | tvp = NULL; | |
f2107e97 | 523 | else { |
5d8d32a3 | 524 | tv.tv_sec = options.server_alive_interval; |
525 | tv.tv_usec = 0; | |
526 | tvp = &tv; | |
527 | } | |
528 | ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp); | |
529 | if (ret < 0) { | |
5260325f | 530 | char buf[100]; |
fd193ca4 | 531 | |
532 | /* | |
533 | * We have to clear the select masks, because we return. | |
534 | * We have to return, because the mainloop checks for the flags | |
535 | * set by the signal handlers. | |
536 | */ | |
b3ad8fe6 | 537 | memset(*readsetp, 0, *nallocp); |
538 | memset(*writesetp, 0, *nallocp); | |
fd193ca4 | 539 | |
5260325f | 540 | if (errno == EINTR) |
541 | return; | |
542 | /* Note: we might still have data in the buffers. */ | |
543 | snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); | |
544 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 545 | quit_pending = 1; |
5d8d32a3 | 546 | } else if (ret == 0) |
547 | server_alive_check(); | |
8efc0c15 | 548 | } |
549 | ||
396c147e | 550 | static void |
2e73a022 | 551 | client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
8efc0c15 | 552 | { |
5260325f | 553 | /* Flush stdout and stderr buffers. */ |
2e73a022 | 554 | if (buffer_len(bout) > 0) |
dc54438a | 555 | atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
2e73a022 | 556 | if (buffer_len(berr) > 0) |
dc54438a | 557 | atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr)); |
5260325f | 558 | |
5260325f | 559 | leave_raw_mode(); |
560 | ||
aa3378df | 561 | /* |
562 | * Free (and clear) the buffer to reduce the amount of data that gets | |
563 | * written to swap. | |
564 | */ | |
2e73a022 | 565 | buffer_free(bin); |
566 | buffer_free(bout); | |
567 | buffer_free(berr); | |
5260325f | 568 | |
5260325f | 569 | /* Send the suspend signal to the program itself. */ |
570 | kill(getpid(), SIGTSTP); | |
571 | ||
2c9a4d41 | 572 | /* Reset window sizes in case they have changed */ |
573 | received_window_change_signal = 1; | |
5260325f | 574 | |
575 | /* OK, we have been continued by the user. Reinitialize buffers. */ | |
2e73a022 | 576 | buffer_init(bin); |
577 | buffer_init(bout); | |
578 | buffer_init(berr); | |
5260325f | 579 | |
5260325f | 580 | enter_raw_mode(); |
8efc0c15 | 581 | } |
582 | ||
396c147e | 583 | static void |
8ce64345 | 584 | client_process_net_input(fd_set * readset) |
8efc0c15 | 585 | { |
8ce64345 | 586 | int len; |
587 | char buf[8192]; | |
5260325f | 588 | |
aa3378df | 589 | /* |
590 | * Read input from the server, and add any such data to the buffer of | |
591 | * the packet subsystem. | |
592 | */ | |
5260325f | 593 | if (FD_ISSET(connection_in, readset)) { |
594 | /* Read as much as possible. */ | |
595 | len = read(connection_in, buf, sizeof(buf)); | |
596 | if (len == 0) { | |
597 | /* Received EOF. The remote host has closed the connection. */ | |
598 | snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n", | |
599 | host); | |
8efc0c15 | 600 | buffer_append(&stderr_buffer, buf, strlen(buf)); |
8efc0c15 | 601 | quit_pending = 1; |
602 | return; | |
5260325f | 603 | } |
aa3378df | 604 | /* |
605 | * There is a kernel bug on Solaris that causes select to | |
606 | * sometimes wake up even though there is no data available. | |
607 | */ | |
09cb311c | 608 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
5260325f | 609 | len = 0; |
610 | ||
611 | if (len < 0) { | |
612 | /* An error has encountered. Perhaps there is a network problem. */ | |
613 | snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n", | |
614 | host, strerror(errno)); | |
615 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 616 | quit_pending = 1; |
617 | return; | |
618 | } | |
619 | packet_process_incoming(buf, len); | |
620 | } | |
8ce64345 | 621 | } |
622 | ||
5e96b616 | 623 | static void |
624 | client_subsystem_reply(int type, u_int32_t seq, void *ctxt) | |
625 | { | |
626 | int id; | |
627 | Channel *c; | |
f2107e97 | 628 | |
5e96b616 | 629 | id = packet_get_int(); |
630 | packet_check_eom(); | |
631 | ||
632 | if ((c = channel_lookup(id)) == NULL) { | |
633 | error("%s: no channel for id %d", __func__, id); | |
634 | return; | |
635 | } | |
636 | ||
637 | if (type == SSH2_MSG_CHANNEL_SUCCESS) | |
638 | debug2("Request suceeded on channel %d", id); | |
639 | else if (type == SSH2_MSG_CHANNEL_FAILURE) { | |
640 | error("Request failed on channel %d", id); | |
641 | channel_free(c); | |
642 | } | |
643 | } | |
644 | ||
645 | static void | |
646 | client_extra_session2_setup(int id, void *arg) | |
647 | { | |
648 | struct confirm_ctx *cctx = arg; | |
ef07103c | 649 | const char *display; |
5e96b616 | 650 | Channel *c; |
1786be35 | 651 | int i; |
f2107e97 | 652 | |
5e96b616 | 653 | if (cctx == NULL) |
654 | fatal("%s: cctx == NULL", __func__); | |
655 | if ((c = channel_lookup(id)) == NULL) | |
656 | fatal("%s: no channel for id %d", __func__, id); | |
657 | ||
56964485 | 658 | display = getenv("DISPLAY"); |
ef07103c | 659 | if (cctx->want_x_fwd && options.forward_x11 && display != NULL) { |
660 | char *proto, *data; | |
661 | /* Get reasonable local authentication information. */ | |
662 | client_x11_get_proto(display, options.xauth_location, | |
663 | options.forward_x11_trusted, &proto, &data); | |
664 | /* Request forwarding with authentication spoofing. */ | |
665 | debug("Requesting X11 forwarding with authentication spoofing."); | |
666 | x11_request_forwarding_with_spoofing(id, display, proto, data); | |
667 | /* XXX wait for reply */ | |
668 | } | |
669 | ||
670 | if (cctx->want_agent_fwd && options.forward_agent) { | |
671 | debug("Requesting authentication agent forwarding."); | |
672 | channel_request_start(id, "auth-agent-req@openssh.com", 0); | |
673 | packet_send(); | |
674 | } | |
675 | ||
f2107e97 | 676 | client_session2_setup(id, cctx->want_tty, cctx->want_subsys, |
1786be35 | 677 | cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env, |
5e96b616 | 678 | client_subsystem_reply); |
0d34d6ce | 679 | |
5e96b616 | 680 | c->confirm_ctx = NULL; |
681 | buffer_free(&cctx->cmd); | |
1786be35 | 682 | xfree(cctx->term); |
683 | if (cctx->env != NULL) { | |
684 | for (i = 0; cctx->env[i] != NULL; i++) | |
685 | xfree(cctx->env[i]); | |
686 | xfree(cctx->env); | |
f2107e97 | 687 | } |
1786be35 | 688 | xfree(cctx); |
5e96b616 | 689 | } |
690 | ||
691 | static void | |
692 | client_process_control(fd_set * readset) | |
693 | { | |
694 | Buffer m; | |
695 | Channel *c; | |
2ceb8101 | 696 | int client_fd, new_fd[3], ver, allowed; |
5e96b616 | 697 | socklen_t addrlen; |
698 | struct sockaddr_storage addr; | |
699 | struct confirm_ctx *cctx; | |
700 | char *cmd; | |
2ceb8101 | 701 | u_int i, len, env_len, command, flags; |
5e96b616 | 702 | uid_t euid; |
703 | gid_t egid; | |
704 | ||
705 | /* | |
706 | * Accept connection on control socket | |
707 | */ | |
708 | if (control_fd == -1 || !FD_ISSET(control_fd, readset)) | |
709 | return; | |
710 | ||
711 | memset(&addr, 0, sizeof(addr)); | |
712 | addrlen = sizeof(addr); | |
713 | if ((client_fd = accept(control_fd, | |
714 | (struct sockaddr*)&addr, &addrlen)) == -1) { | |
715 | error("%s accept: %s", __func__, strerror(errno)); | |
716 | return; | |
717 | } | |
718 | ||
719 | if (getpeereid(client_fd, &euid, &egid) < 0) { | |
720 | error("%s getpeereid failed: %s", __func__, strerror(errno)); | |
721 | close(client_fd); | |
722 | return; | |
723 | } | |
724 | if ((euid != 0) && (getuid() != euid)) { | |
725 | error("control mode uid mismatch: peer euid %u != uid %u", | |
726 | (u_int) euid, (u_int) getuid()); | |
727 | close(client_fd); | |
728 | return; | |
729 | } | |
0d34d6ce | 730 | |
5e96b616 | 731 | unset_nonblock(client_fd); |
732 | ||
f8c6db83 | 733 | /* Read command */ |
5e96b616 | 734 | buffer_init(&m); |
f8c6db83 | 735 | if (ssh_msg_recv(client_fd, &m) == -1) { |
736 | error("%s: client msg_recv failed", __func__); | |
737 | close(client_fd); | |
738 | buffer_free(&m); | |
739 | return; | |
740 | } | |
ef07103c | 741 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
f8c6db83 | 742 | error("%s: wrong client version %d", __func__, ver); |
743 | buffer_free(&m); | |
744 | close(client_fd); | |
745 | return; | |
746 | } | |
747 | ||
748 | allowed = 1; | |
749 | command = buffer_get_int(&m); | |
750 | flags = buffer_get_int(&m); | |
751 | ||
752 | buffer_clear(&m); | |
5e96b616 | 753 | |
f8c6db83 | 754 | switch (command) { |
755 | case SSHMUX_COMMAND_OPEN: | |
9dfd96d6 | 756 | if (options.control_master == SSHCTL_MASTER_ASK || |
757 | options.control_master == SSHCTL_MASTER_AUTO_ASK) | |
f8c6db83 | 758 | allowed = ask_permission("Allow shared connection " |
759 | "to %s? ", host); | |
760 | /* continue below */ | |
761 | break; | |
762 | case SSHMUX_COMMAND_TERMINATE: | |
9dfd96d6 | 763 | if (options.control_master == SSHCTL_MASTER_ASK || |
764 | options.control_master == SSHCTL_MASTER_AUTO_ASK) | |
f8c6db83 | 765 | allowed = ask_permission("Terminate shared connection " |
766 | "to %s? ", host); | |
767 | if (allowed) | |
768 | quit_pending = 1; | |
f8cc7664 | 769 | /* FALLTHROUGH */ |
f8c6db83 | 770 | case SSHMUX_COMMAND_ALIVE_CHECK: |
771 | /* Reply for SSHMUX_COMMAND_TERMINATE and ALIVE_CHECK */ | |
772 | buffer_clear(&m); | |
773 | buffer_put_int(&m, allowed); | |
774 | buffer_put_int(&m, getpid()); | |
ef07103c | 775 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
f8c6db83 | 776 | error("%s: client msg_send failed", __func__); |
777 | close(client_fd); | |
778 | buffer_free(&m); | |
779 | return; | |
780 | } | |
781 | buffer_free(&m); | |
782 | close(client_fd); | |
783 | return; | |
784 | default: | |
785 | error("Unsupported command %d", command); | |
786 | buffer_free(&m); | |
787 | close(client_fd); | |
788 | return; | |
789 | } | |
790 | ||
791 | /* Reply for SSHMUX_COMMAND_OPEN */ | |
792 | buffer_clear(&m); | |
0d34d6ce | 793 | buffer_put_int(&m, allowed); |
5e96b616 | 794 | buffer_put_int(&m, getpid()); |
ef07103c | 795 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
5e96b616 | 796 | error("%s: client msg_send failed", __func__); |
797 | close(client_fd); | |
0d34d6ce | 798 | buffer_free(&m); |
5e96b616 | 799 | return; |
800 | } | |
5e96b616 | 801 | |
0d34d6ce | 802 | if (!allowed) { |
803 | error("Refused control connection"); | |
804 | close(client_fd); | |
805 | buffer_free(&m); | |
806 | return; | |
807 | } | |
808 | ||
f8c6db83 | 809 | buffer_clear(&m); |
5e96b616 | 810 | if (ssh_msg_recv(client_fd, &m) == -1) { |
811 | error("%s: client msg_recv failed", __func__); | |
812 | close(client_fd); | |
0d34d6ce | 813 | buffer_free(&m); |
5e96b616 | 814 | return; |
815 | } | |
ef07103c | 816 | if ((ver = buffer_get_char(&m)) != SSHMUX_VER) { |
5e96b616 | 817 | error("%s: wrong client version %d", __func__, ver); |
818 | buffer_free(&m); | |
819 | close(client_fd); | |
820 | return; | |
821 | } | |
822 | ||
823 | cctx = xmalloc(sizeof(*cctx)); | |
824 | memset(cctx, 0, sizeof(*cctx)); | |
f8c6db83 | 825 | cctx->want_tty = (flags & SSHMUX_FLAG_TTY) != 0; |
826 | cctx->want_subsys = (flags & SSHMUX_FLAG_SUBSYS) != 0; | |
ef07103c | 827 | cctx->want_x_fwd = (flags & SSHMUX_FLAG_X11_FWD) != 0; |
828 | cctx->want_agent_fwd = (flags & SSHMUX_FLAG_AGENT_FWD) != 0; | |
5e96b616 | 829 | cctx->term = buffer_get_string(&m, &len); |
830 | ||
831 | cmd = buffer_get_string(&m, &len); | |
832 | buffer_init(&cctx->cmd); | |
833 | buffer_append(&cctx->cmd, cmd, strlen(cmd)); | |
834 | ||
1786be35 | 835 | env_len = buffer_get_int(&m); |
836 | env_len = MIN(env_len, 4096); | |
837 | debug3("%s: receiving %d env vars", __func__, env_len); | |
838 | if (env_len != 0) { | |
839 | cctx->env = xmalloc(sizeof(*cctx->env) * (env_len + 1)); | |
840 | for (i = 0; i < env_len; i++) | |
841 | cctx->env[i] = buffer_get_string(&m, &len); | |
842 | cctx->env[i] = NULL; | |
843 | } | |
844 | ||
5e96b616 | 845 | debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__, |
846 | cctx->want_tty, cctx->want_subsys, cmd); | |
847 | ||
848 | /* Gather fds from client */ | |
849 | new_fd[0] = mm_receive_fd(client_fd); | |
850 | new_fd[1] = mm_receive_fd(client_fd); | |
851 | new_fd[2] = mm_receive_fd(client_fd); | |
852 | ||
853 | debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__, | |
854 | new_fd[0], new_fd[1], new_fd[2]); | |
855 | ||
856 | /* Try to pick up ttymodes from client before it goes raw */ | |
857 | if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1) | |
858 | error("%s: tcgetattr: %s", __func__, strerror(errno)); | |
859 | ||
f8c6db83 | 860 | /* This roundtrip is just for synchronisation of ttymodes */ |
5e96b616 | 861 | buffer_clear(&m); |
ef07103c | 862 | if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) { |
5e96b616 | 863 | error("%s: client msg_send failed", __func__); |
864 | close(client_fd); | |
865 | close(new_fd[0]); | |
866 | close(new_fd[1]); | |
867 | close(new_fd[2]); | |
0d34d6ce | 868 | buffer_free(&m); |
f8c6db83 | 869 | xfree(cctx->term); |
870 | if (env_len != 0) { | |
871 | for (i = 0; i < env_len; i++) | |
872 | xfree(cctx->env[i]); | |
873 | xfree(cctx->env); | |
874 | } | |
5e96b616 | 875 | return; |
876 | } | |
877 | buffer_free(&m); | |
878 | ||
879 | /* enable nonblocking unless tty */ | |
880 | if (!isatty(new_fd[0])) | |
881 | set_nonblock(new_fd[0]); | |
882 | if (!isatty(new_fd[1])) | |
883 | set_nonblock(new_fd[1]); | |
884 | if (!isatty(new_fd[2])) | |
885 | set_nonblock(new_fd[2]); | |
886 | ||
887 | set_nonblock(client_fd); | |
888 | ||
f2107e97 | 889 | c = channel_new("session", SSH_CHANNEL_OPENING, |
5e96b616 | 890 | new_fd[0], new_fd[1], new_fd[2], |
891 | CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT, | |
892 | CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0); | |
893 | ||
894 | /* XXX */ | |
895 | c->ctl_fd = client_fd; | |
896 | ||
897 | debug3("%s: channel_new: %d", __func__, c->self); | |
898 | ||
899 | channel_send_open(c->self); | |
900 | channel_register_confirm(c->self, client_extra_session2_setup, cctx); | |
901 | } | |
902 | ||
c53c54c2 | 903 | static void |
ec9b7086 | 904 | process_cmdline(void) |
c53c54c2 | 905 | { |
c53c54c2 | 906 | void (*handler)(int); |
3867aa0a | 907 | char *s, *cmd, *cancel_host; |
d740ec16 | 908 | int delete = 0; |
c53c54c2 | 909 | int local = 0; |
3867aa0a | 910 | u_short cancel_port; |
911 | Forward fwd; | |
c53c54c2 | 912 | |
913 | leave_raw_mode(); | |
875ec275 | 914 | handler = signal(SIGINT, SIG_IGN); |
ec9b7086 | 915 | cmd = s = read_passphrase("\r\nssh> ", RP_ECHO); |
c53c54c2 | 916 | if (s == NULL) |
917 | goto out; | |
c53c54c2 | 918 | while (*s && isspace(*s)) |
919 | s++; | |
d740ec16 | 920 | if (*s == '-') |
921 | s++; /* Skip cmdline '-', if any */ | |
27c6fcae | 922 | if (*s == '\0') |
c53c54c2 | 923 | goto out; |
d740ec16 | 924 | |
7069a5e2 | 925 | if (*s == 'h' || *s == 'H' || *s == '?') { |
d740ec16 | 926 | logit("Commands:"); |
927 | logit(" -Lport:host:hostport Request local forward"); | |
928 | logit(" -Rport:host:hostport Request remote forward"); | |
929 | logit(" -KRhostport Cancel remote forward"); | |
d20f3c9e | 930 | if (!options.permit_local_command) |
931 | goto out; | |
932 | logit(" !args Execute local command"); | |
933 | goto out; | |
934 | } | |
935 | ||
936 | if (*s == '!' && options.permit_local_command) { | |
937 | s++; | |
938 | ssh_local_cmd(s); | |
d740ec16 | 939 | goto out; |
940 | } | |
941 | ||
942 | if (*s == 'K') { | |
943 | delete = 1; | |
944 | s++; | |
945 | } | |
946 | if (*s != 'L' && *s != 'R') { | |
bbe88b6d | 947 | logit("Invalid command."); |
c53c54c2 | 948 | goto out; |
949 | } | |
d740ec16 | 950 | if (*s == 'L') |
c53c54c2 | 951 | local = 1; |
d740ec16 | 952 | if (local && delete) { |
953 | logit("Not supported."); | |
954 | goto out; | |
955 | } | |
956 | if ((!local || delete) && !compat20) { | |
bbe88b6d | 957 | logit("Not supported for SSH protocol version 1."); |
c53c54c2 | 958 | goto out; |
959 | } | |
d740ec16 | 960 | |
961 | s++; | |
c53c54c2 | 962 | while (*s && isspace(*s)) |
963 | s++; | |
964 | ||
d740ec16 | 965 | if (delete) { |
3867aa0a | 966 | cancel_port = 0; |
967 | cancel_host = hpdelim(&s); /* may be NULL */ | |
968 | if (s != NULL) { | |
969 | cancel_port = a2port(s); | |
970 | cancel_host = cleanhostname(cancel_host); | |
971 | } else { | |
972 | cancel_port = a2port(cancel_host); | |
973 | cancel_host = NULL; | |
d740ec16 | 974 | } |
3867aa0a | 975 | if (cancel_port == 0) { |
976 | logit("Bad forwarding close port"); | |
c53c54c2 | 977 | goto out; |
978 | } | |
3867aa0a | 979 | channel_request_rforward_cancel(cancel_host, cancel_port); |
d740ec16 | 980 | } else { |
3867aa0a | 981 | if (!parse_forward(&fwd, s)) { |
d740ec16 | 982 | logit("Bad forwarding specification."); |
983 | goto out; | |
984 | } | |
d740ec16 | 985 | if (local) { |
3867aa0a | 986 | if (channel_setup_local_fwd_listener(fwd.listen_host, |
987 | fwd.listen_port, fwd.connect_host, | |
988 | fwd.connect_port, options.gateway_ports) < 0) { | |
d740ec16 | 989 | logit("Port forwarding failed."); |
990 | goto out; | |
991 | } | |
3867aa0a | 992 | } else { |
993 | channel_request_remote_forwarding(fwd.listen_host, | |
994 | fwd.listen_port, fwd.connect_host, | |
995 | fwd.connect_port); | |
996 | } | |
997 | ||
d740ec16 | 998 | logit("Forwarding port."); |
999 | } | |
1000 | ||
c53c54c2 | 1001 | out: |
1002 | signal(SIGINT, handler); | |
1003 | enter_raw_mode(); | |
1004 | if (cmd) | |
1005 | xfree(cmd); | |
1006 | } | |
1007 | ||
2e73a022 | 1008 | /* process the characters one by one */ |
396c147e | 1009 | static int |
2e73a022 | 1010 | process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len) |
1011 | { | |
1012 | char string[1024]; | |
1013 | pid_t pid; | |
1014 | int bytes = 0; | |
1e3b8b07 | 1015 | u_int i; |
1016 | u_char ch; | |
2e73a022 | 1017 | char *s; |
1018 | ||
2ceb8101 | 1019 | if (len <= 0) |
1020 | return (0); | |
1021 | ||
1022 | for (i = 0; i < (u_int)len; i++) { | |
2e73a022 | 1023 | /* Get one character at a time. */ |
1024 | ch = buf[i]; | |
1025 | ||
1026 | if (escape_pending) { | |
1027 | /* We have previously seen an escape character. */ | |
1028 | /* Clear the flag now. */ | |
1029 | escape_pending = 0; | |
1030 | ||
1031 | /* Process the escaped character. */ | |
1032 | switch (ch) { | |
1033 | case '.': | |
1034 | /* Terminate the connection. */ | |
1035 | snprintf(string, sizeof string, "%c.\r\n", escape_char); | |
1036 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1037 | |
1038 | quit_pending = 1; | |
1039 | return -1; | |
1040 | ||
1041 | case 'Z' - 64: | |
1042 | /* Suspend the program. */ | |
1043 | /* Print a message to that effect to the user. */ | |
1044 | snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char); | |
1045 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1046 | |
1047 | /* Restore terminal modes and suspend. */ | |
1048 | client_suspend_self(bin, bout, berr); | |
1049 | ||
1050 | /* We have been continued. */ | |
1051 | continue; | |
1052 | ||
16a79097 | 1053 | case 'B': |
1054 | if (compat20) { | |
1055 | snprintf(string, sizeof string, | |
1056 | "%cB\r\n", escape_char); | |
1057 | buffer_append(berr, string, | |
1058 | strlen(string)); | |
1059 | channel_request_start(session_ident, | |
1060 | "break", 0); | |
1061 | packet_put_int(1000); | |
1062 | packet_send(); | |
1063 | } | |
1064 | continue; | |
1065 | ||
e092ce67 | 1066 | case 'R': |
54506d2e | 1067 | if (compat20) { |
1068 | if (datafellows & SSH_BUG_NOREKEY) | |
bbe88b6d | 1069 | logit("Server does not support re-keying"); |
54506d2e | 1070 | else |
1071 | need_rekeying = 1; | |
1072 | } | |
e092ce67 | 1073 | continue; |
1074 | ||
2e73a022 | 1075 | case '&': |
2e73a022 | 1076 | /* |
1077 | * Detach the program (continue to serve connections, | |
1078 | * but put in background and no more new connections). | |
1079 | */ | |
2e73a022 | 1080 | /* Restore tty modes. */ |
1081 | leave_raw_mode(); | |
1082 | ||
1083 | /* Stop listening for new connections. */ | |
c6940381 | 1084 | channel_stop_listening(); |
2e73a022 | 1085 | |
c6940381 | 1086 | snprintf(string, sizeof string, |
1087 | "%c& [backgrounded]\n", escape_char); | |
1088 | buffer_append(berr, string, strlen(string)); | |
2e73a022 | 1089 | |
1090 | /* Fork into background. */ | |
1091 | pid = fork(); | |
1092 | if (pid < 0) { | |
1093 | error("fork: %.100s", strerror(errno)); | |
1094 | continue; | |
1095 | } | |
1096 | if (pid != 0) { /* This is the parent. */ | |
1097 | /* The parent just exits. */ | |
1098 | exit(0); | |
1099 | } | |
1100 | /* The child continues serving connections. */ | |
c6940381 | 1101 | if (compat20) { |
1102 | buffer_append(bin, "\004", 1); | |
1103 | /* fake EOF on stdin */ | |
1104 | return -1; | |
1105 | } else if (!stdin_eof) { | |
1106 | /* | |
1107 | * Sending SSH_CMSG_EOF alone does not always appear | |
1108 | * to be enough. So we try to send an EOF character | |
1109 | * first. | |
1110 | */ | |
1111 | packet_start(SSH_CMSG_STDIN_DATA); | |
1112 | packet_put_string("\004", 1); | |
1113 | packet_send(); | |
1114 | /* Close stdin. */ | |
1115 | stdin_eof = 1; | |
1116 | if (buffer_len(bin) == 0) { | |
1117 | packet_start(SSH_CMSG_EOF); | |
1118 | packet_send(); | |
1119 | } | |
1120 | } | |
1121 | continue; | |
2e73a022 | 1122 | |
1123 | case '?': | |
1124 | snprintf(string, sizeof string, | |
1125 | "%c?\r\n\ | |
1126 | Supported escape sequences:\r\n\ | |
1d77f8cb | 1127 | %c. - terminate connection\r\n\ |
16a79097 | 1128 | %cB - send a BREAK to the remote system\r\n\ |
1d77f8cb | 1129 | %cC - open a command line\r\n\ |
1130 | %cR - Request rekey (SSH protocol 2 only)\r\n\ | |
1131 | %c^Z - suspend ssh\r\n\ | |
1132 | %c# - list forwarded connections\r\n\ | |
1133 | %c& - background ssh (when waiting for connections to terminate)\r\n\ | |
1134 | %c? - this message\r\n\ | |
1135 | %c%c - send the escape character by typing it twice\r\n\ | |
2e73a022 | 1136 | (Note that escapes are only recognized immediately after newline.)\r\n", |
1d77f8cb | 1137 | escape_char, escape_char, escape_char, escape_char, |
1138 | escape_char, escape_char, escape_char, escape_char, | |
16a79097 | 1139 | escape_char, escape_char, escape_char); |
2e73a022 | 1140 | buffer_append(berr, string, strlen(string)); |
1141 | continue; | |
1142 | ||
1143 | case '#': | |
1144 | snprintf(string, sizeof string, "%c#\r\n", escape_char); | |
1145 | buffer_append(berr, string, strlen(string)); | |
1146 | s = channel_open_message(); | |
1147 | buffer_append(berr, s, strlen(s)); | |
1148 | xfree(s); | |
1149 | continue; | |
1150 | ||
c53c54c2 | 1151 | case 'C': |
ec9b7086 | 1152 | process_cmdline(); |
c53c54c2 | 1153 | continue; |
1154 | ||
2e73a022 | 1155 | default: |
1156 | if (ch != escape_char) { | |
1157 | buffer_put_char(bin, escape_char); | |
1158 | bytes++; | |
1159 | } | |
1160 | /* Escaped characters fall through here */ | |
1161 | break; | |
1162 | } | |
1163 | } else { | |
1164 | /* | |
1165 | * The previous character was not an escape char. Check if this | |
1166 | * is an escape. | |
1167 | */ | |
1168 | if (last_was_cr && ch == escape_char) { | |
1169 | /* It is. Set the flag and continue to next character. */ | |
1170 | escape_pending = 1; | |
1171 | continue; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * Normal character. Record whether it was a newline, | |
1177 | * and append it to the buffer. | |
1178 | */ | |
1179 | last_was_cr = (ch == '\r' || ch == '\n'); | |
1180 | buffer_put_char(bin, ch); | |
1181 | bytes++; | |
1182 | } | |
1183 | return bytes; | |
1184 | } | |
1185 | ||
396c147e | 1186 | static void |
8ce64345 | 1187 | client_process_input(fd_set * readset) |
1188 | { | |
9da5c3c9 | 1189 | int len; |
2e73a022 | 1190 | char buf[8192]; |
8ce64345 | 1191 | |
5260325f | 1192 | /* Read input from stdin. */ |
1193 | if (FD_ISSET(fileno(stdin), readset)) { | |
1194 | /* Read as much as possible. */ | |
1195 | len = read(fileno(stdin), buf, sizeof(buf)); | |
cf6bc93c | 1196 | if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
1197 | return; /* we'll try again later */ | |
5260325f | 1198 | if (len <= 0) { |
aa3378df | 1199 | /* |
1200 | * Received EOF or error. They are treated | |
1201 | * similarly, except that an error message is printed | |
1202 | * if it was an error condition. | |
1203 | */ | |
5260325f | 1204 | if (len < 0) { |
1205 | snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno)); | |
1206 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 1207 | } |
1208 | /* Mark that we have seen EOF. */ | |
1209 | stdin_eof = 1; | |
aa3378df | 1210 | /* |
1211 | * Send an EOF message to the server unless there is | |
1212 | * data in the buffer. If there is data in the | |
1213 | * buffer, no message will be sent now. Code | |
1214 | * elsewhere will send the EOF when the buffer | |
1215 | * becomes empty if stdin_eof is set. | |
1216 | */ | |
5260325f | 1217 | if (buffer_len(&stdin_buffer) == 0) { |
8efc0c15 | 1218 | packet_start(SSH_CMSG_EOF); |
1219 | packet_send(); | |
5260325f | 1220 | } |
4bf9c10e | 1221 | } else if (escape_char == SSH_ESCAPECHAR_NONE) { |
aa3378df | 1222 | /* |
1223 | * Normal successful read, and no escape character. | |
1224 | * Just append the data to buffer. | |
1225 | */ | |
5260325f | 1226 | buffer_append(&stdin_buffer, buf, len); |
5260325f | 1227 | } else { |
aa3378df | 1228 | /* |
1229 | * Normal, successful read. But we have an escape character | |
1230 | * and have to process the characters one by one. | |
1231 | */ | |
7e8911cd | 1232 | if (process_escapes(&stdin_buffer, &stdout_buffer, |
1233 | &stderr_buffer, buf, len) == -1) | |
2e73a022 | 1234 | return; |
5260325f | 1235 | } |
1236 | } | |
8efc0c15 | 1237 | } |
1238 | ||
396c147e | 1239 | static void |
5260325f | 1240 | client_process_output(fd_set * writeset) |
8efc0c15 | 1241 | { |
5260325f | 1242 | int len; |
1243 | char buf[100]; | |
1244 | ||
1245 | /* Write buffered output to stdout. */ | |
1246 | if (FD_ISSET(fileno(stdout), writeset)) { | |
1247 | /* Write as much data as possible. */ | |
1248 | len = write(fileno(stdout), buffer_ptr(&stdout_buffer), | |
a408af76 | 1249 | buffer_len(&stdout_buffer)); |
5260325f | 1250 | if (len <= 0) { |
cf6bc93c | 1251 | if (errno == EINTR || errno == EAGAIN) |
5260325f | 1252 | len = 0; |
1253 | else { | |
aa3378df | 1254 | /* |
1255 | * An error or EOF was encountered. Put an | |
1256 | * error message to stderr buffer. | |
1257 | */ | |
5260325f | 1258 | snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno)); |
1259 | buffer_append(&stderr_buffer, buf, strlen(buf)); | |
5260325f | 1260 | quit_pending = 1; |
1261 | return; | |
1262 | } | |
1263 | } | |
1264 | /* Consume printed data from the buffer. */ | |
1265 | buffer_consume(&stdout_buffer, len); | |
cd332296 | 1266 | stdout_bytes += len; |
5260325f | 1267 | } |
1268 | /* Write buffered output to stderr. */ | |
1269 | if (FD_ISSET(fileno(stderr), writeset)) { | |
1270 | /* Write as much data as possible. */ | |
1271 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1272 | buffer_len(&stderr_buffer)); |
5260325f | 1273 | if (len <= 0) { |
cf6bc93c | 1274 | if (errno == EINTR || errno == EAGAIN) |
5260325f | 1275 | len = 0; |
1276 | else { | |
aa3378df | 1277 | /* EOF or error, but can't even print error message. */ |
5260325f | 1278 | quit_pending = 1; |
1279 | return; | |
1280 | } | |
1281 | } | |
1282 | /* Consume printed characters from the buffer. */ | |
1283 | buffer_consume(&stderr_buffer, len); | |
cd332296 | 1284 | stderr_bytes += len; |
8efc0c15 | 1285 | } |
8efc0c15 | 1286 | } |
1287 | ||
7368a6c8 | 1288 | /* |
1289 | * Get packets from the connection input buffer, and process them as long as | |
1290 | * there are packets available. | |
1291 | * | |
1292 | * Any unknown packets received during the actual | |
1293 | * session cause the session to terminate. This is | |
1294 | * intended to make debugging easier since no | |
1295 | * confirmations are sent. Any compatible protocol | |
1296 | * extensions must be negotiated during the | |
1297 | * preparatory phase. | |
1298 | */ | |
1299 | ||
396c147e | 1300 | static void |
5ca51e19 | 1301 | client_process_buffered_input_packets(void) |
7368a6c8 | 1302 | { |
e092ce67 | 1303 | dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL); |
7368a6c8 | 1304 | } |
1305 | ||
2e73a022 | 1306 | /* scan buf[] for '~' before sending data to the peer */ |
1307 | ||
396c147e | 1308 | static int |
2e73a022 | 1309 | simple_escape_filter(Channel *c, char *buf, int len) |
1310 | { | |
1311 | /* XXX we assume c->extended is writeable */ | |
1312 | return process_escapes(&c->input, &c->output, &c->extended, buf, len); | |
1313 | } | |
1314 | ||
396c147e | 1315 | static void |
eb0dd41f | 1316 | client_channel_closed(int id, void *arg) |
1317 | { | |
418e724c | 1318 | channel_cancel_cleanup(id); |
eb0dd41f | 1319 | session_closed = 1; |
82de775c | 1320 | leave_raw_mode(); |
eb0dd41f | 1321 | } |
1322 | ||
aa3378df | 1323 | /* |
1324 | * Implements the interactive session with the server. This is called after | |
1325 | * the user has been authenticated, and a command has been started on the | |
4bf9c10e | 1326 | * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character |
1327 | * used as an escape character for terminating or suspending the session. | |
aa3378df | 1328 | */ |
8efc0c15 | 1329 | |
6ae2364d | 1330 | int |
2e73a022 | 1331 | client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) |
8efc0c15 | 1332 | { |
39929cdb | 1333 | fd_set *readset = NULL, *writeset = NULL; |
5260325f | 1334 | double start_time, total_time; |
9a995072 | 1335 | int max_fd = 0, max_fd2 = 0, len, rekeying = 0; |
1336 | u_int nalloc = 0; | |
5260325f | 1337 | char buf[100]; |
1338 | ||
1339 | debug("Entering interactive session."); | |
1340 | ||
1341 | start_time = get_current_time(); | |
1342 | ||
1343 | /* Initialize variables. */ | |
1344 | escape_pending = 0; | |
1345 | last_was_cr = 1; | |
1346 | exit_status = -1; | |
1347 | stdin_eof = 0; | |
1348 | buffer_high = 64 * 1024; | |
1349 | connection_in = packet_get_connection_in(); | |
1350 | connection_out = packet_get_connection_out(); | |
39929cdb | 1351 | max_fd = MAX(connection_in, connection_out); |
5e96b616 | 1352 | if (control_fd != -1) |
1353 | max_fd = MAX(max_fd, control_fd); | |
39929cdb | 1354 | |
1355 | if (!compat20) { | |
e968270c | 1356 | /* enable nonblocking unless tty */ |
1357 | if (!isatty(fileno(stdin))) | |
1358 | set_nonblock(fileno(stdin)); | |
1359 | if (!isatty(fileno(stdout))) | |
1360 | set_nonblock(fileno(stdout)); | |
1361 | if (!isatty(fileno(stderr))) | |
1362 | set_nonblock(fileno(stderr)); | |
39929cdb | 1363 | max_fd = MAX(max_fd, fileno(stdin)); |
1364 | max_fd = MAX(max_fd, fileno(stdout)); | |
1365 | max_fd = MAX(max_fd, fileno(stderr)); | |
1366 | } | |
5260325f | 1367 | stdin_bytes = 0; |
1368 | stdout_bytes = 0; | |
1369 | stderr_bytes = 0; | |
1370 | quit_pending = 0; | |
1371 | escape_char = escape_char_arg; | |
1372 | ||
1373 | /* Initialize buffers. */ | |
1374 | buffer_init(&stdin_buffer); | |
1375 | buffer_init(&stdout_buffer); | |
1376 | buffer_init(&stderr_buffer); | |
1377 | ||
7368a6c8 | 1378 | client_init_dispatch(); |
1379 | ||
3c93c917 | 1380 | /* |
1381 | * Set signal handlers, (e.g. to restore non-blocking mode) | |
1382 | * but don't overwrite SIG_IGN, matches behaviour from rsh(1) | |
1383 | */ | |
d3e5d1e9 | 1384 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN) |
1385 | signal(SIGHUP, signal_handler); | |
3c93c917 | 1386 | if (signal(SIGINT, SIG_IGN) != SIG_IGN) |
1387 | signal(SIGINT, signal_handler); | |
1388 | if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) | |
1389 | signal(SIGQUIT, signal_handler); | |
1390 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN) | |
1391 | signal(SIGTERM, signal_handler); | |
2c9a4d41 | 1392 | signal(SIGWINCH, window_change_handler); |
5260325f | 1393 | |
5260325f | 1394 | if (have_pty) |
1395 | enter_raw_mode(); | |
1396 | ||
1fc8ccdf | 1397 | if (compat20) { |
1398 | session_ident = ssh2_chan_id; | |
4bf9c10e | 1399 | if (escape_char != SSH_ESCAPECHAR_NONE) |
1fc8ccdf | 1400 | channel_register_filter(session_ident, |
c1c6a032 | 1401 | simple_escape_filter, NULL); |
eb0dd41f | 1402 | if (session_ident != -1) |
1403 | channel_register_cleanup(session_ident, | |
8cd0437d | 1404 | client_channel_closed, 0); |
1fc8ccdf | 1405 | } else { |
1406 | /* Check if we should immediately send eof on stdin. */ | |
8ce64345 | 1407 | client_check_initial_eof_on_stdin(); |
1fc8ccdf | 1408 | } |
2e73a022 | 1409 | |
5260325f | 1410 | /* Main loop of the client for the interactive session mode. */ |
1411 | while (!quit_pending) { | |
5260325f | 1412 | |
aa3378df | 1413 | /* Process buffered packets sent by the server. */ |
5260325f | 1414 | client_process_buffered_input_packets(); |
1415 | ||
eb0dd41f | 1416 | if (compat20 && session_closed && !channel_still_open()) |
8ce64345 | 1417 | break; |
eb0dd41f | 1418 | |
1419 | rekeying = (xxx_kex != NULL && !xxx_kex->done); | |
8ce64345 | 1420 | |
c422989b | 1421 | if (rekeying) { |
1422 | debug("rekeying in progress"); | |
1423 | } else { | |
1424 | /* | |
1425 | * Make packets of buffered stdin data, and buffer | |
1426 | * them for sending to the server. | |
1427 | */ | |
1428 | if (!compat20) | |
1429 | client_make_packets_from_stdin_data(); | |
5260325f | 1430 | |
c422989b | 1431 | /* |
1432 | * Make packets from buffered channel data, and | |
1433 | * enqueue them for sending to the server. | |
1434 | */ | |
1435 | if (packet_not_very_much_data_to_write()) | |
1436 | channel_output_poll(); | |
5260325f | 1437 | |
c422989b | 1438 | /* |
1439 | * Check if the window size has changed, and buffer a | |
1440 | * message about it to the server if so. | |
1441 | */ | |
1442 | client_check_window_change(); | |
5260325f | 1443 | |
c422989b | 1444 | if (quit_pending) |
1445 | break; | |
1446 | } | |
aa3378df | 1447 | /* |
1448 | * Wait until we have something to do (something becomes | |
1449 | * available on one of the descriptors). | |
1450 | */ | |
489aa2e9 | 1451 | max_fd2 = max_fd; |
c422989b | 1452 | client_wait_until_can_do_something(&readset, &writeset, |
489aa2e9 | 1453 | &max_fd2, &nalloc, rekeying); |
5260325f | 1454 | |
1455 | if (quit_pending) | |
1456 | break; | |
1457 | ||
c422989b | 1458 | /* Do channel operations unless rekeying in progress. */ |
1459 | if (!rekeying) { | |
1460 | channel_after_select(readset, writeset); | |
ffd7b36b | 1461 | if (need_rekeying || packet_need_rekeying()) { |
1462 | debug("need rekeying"); | |
c422989b | 1463 | xxx_kex->done = 0; |
1464 | kex_send_kexinit(xxx_kex); | |
1465 | need_rekeying = 0; | |
1466 | } | |
1467 | } | |
5260325f | 1468 | |
8ce64345 | 1469 | /* Buffer input from the connection. */ |
39929cdb | 1470 | client_process_net_input(readset); |
5260325f | 1471 | |
5e96b616 | 1472 | /* Accept control connections. */ |
1473 | client_process_control(readset); | |
1474 | ||
8ce64345 | 1475 | if (quit_pending) |
1476 | break; | |
1477 | ||
1478 | if (!compat20) { | |
1479 | /* Buffer data from stdin */ | |
39929cdb | 1480 | client_process_input(readset); |
8ce64345 | 1481 | /* |
1482 | * Process output to stdout and stderr. Output to | |
1483 | * the connection is processed elsewhere (above). | |
1484 | */ | |
39929cdb | 1485 | client_process_output(writeset); |
8ce64345 | 1486 | } |
5260325f | 1487 | |
aa3378df | 1488 | /* Send as much buffered packet data as possible to the sender. */ |
39929cdb | 1489 | if (FD_ISSET(connection_out, writeset)) |
5260325f | 1490 | packet_write_poll(); |
1491 | } | |
39929cdb | 1492 | if (readset) |
1493 | xfree(readset); | |
1494 | if (writeset) | |
1495 | xfree(writeset); | |
5260325f | 1496 | |
1497 | /* Terminate the session. */ | |
1498 | ||
1499 | /* Stop watching for window change. */ | |
2c9a4d41 | 1500 | signal(SIGWINCH, SIG_DFL); |
5260325f | 1501 | |
d6746a0b | 1502 | channel_free_all(); |
5260325f | 1503 | |
c9130033 | 1504 | if (have_pty) |
1505 | leave_raw_mode(); | |
89aa792b | 1506 | |
1507 | /* restore blocking io */ | |
1508 | if (!isatty(fileno(stdin))) | |
1509 | unset_nonblock(fileno(stdin)); | |
1510 | if (!isatty(fileno(stdout))) | |
1511 | unset_nonblock(fileno(stdout)); | |
1512 | if (!isatty(fileno(stderr))) | |
1513 | unset_nonblock(fileno(stderr)); | |
1514 | ||
66357af5 | 1515 | /* |
1516 | * If there was no shell or command requested, there will be no remote | |
1517 | * exit status to be returned. In that case, clear error code if the | |
1518 | * connection was deliberately terminated at this end. | |
1519 | */ | |
1520 | if (no_shell_flag && received_signal == SIGTERM) { | |
1521 | received_signal = 0; | |
1522 | exit_status = 0; | |
1523 | } | |
1524 | ||
82de775c | 1525 | if (received_signal) |
010f9726 | 1526 | fatal("Killed by signal %d.", (int) received_signal); |
c9130033 | 1527 | |
1528 | /* | |
1529 | * In interactive mode (with pseudo tty) display a message indicating | |
1530 | * that the connection has been closed. | |
1531 | */ | |
1532 | if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { | |
1533 | snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host); | |
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); |
cd332296 | 1546 | stdout_bytes += len; |
8efc0c15 | 1547 | } |
5260325f | 1548 | |
1549 | /* Output any buffered data for stderr. */ | |
89aa792b | 1550 | while (buffer_len(&stderr_buffer) > 0) { |
1551 | len = write(fileno(stderr), buffer_ptr(&stderr_buffer), | |
a408af76 | 1552 | buffer_len(&stderr_buffer)); |
89aa792b | 1553 | if (len <= 0) { |
5260325f | 1554 | error("Write failed flushing stderr buffer."); |
89aa792b | 1555 | break; |
1556 | } | |
5260325f | 1557 | buffer_consume(&stderr_buffer, len); |
cd332296 | 1558 | stderr_bytes += len; |
5260325f | 1559 | } |
1560 | ||
5260325f | 1561 | /* Clear and free any buffers. */ |
1562 | memset(buf, 0, sizeof(buf)); | |
1563 | buffer_free(&stdin_buffer); | |
1564 | buffer_free(&stdout_buffer); | |
1565 | buffer_free(&stderr_buffer); | |
1566 | ||
1567 | /* Report bytes transferred, and transfer rates. */ | |
1568 | total_time = get_current_time() - start_time; | |
1569 | debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds", | |
184eed6a | 1570 | stdin_bytes, stdout_bytes, stderr_bytes, total_time); |
5260325f | 1571 | if (total_time > 0) |
1572 | debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f", | |
184eed6a | 1573 | stdin_bytes / total_time, stdout_bytes / total_time, |
1574 | stderr_bytes / total_time); | |
5260325f | 1575 | |
1576 | /* Return the exit status of the program. */ | |
1577 | debug("Exit status %d", exit_status); | |
1578 | return exit_status; | |
8efc0c15 | 1579 | } |
7368a6c8 | 1580 | |
1581 | /*********/ | |
1582 | ||
396c147e | 1583 | static void |
7819b5c3 | 1584 | client_input_stdout_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1585 | { |
1e3b8b07 | 1586 | u_int data_len; |
7368a6c8 | 1587 | char *data = packet_get_string(&data_len); |
95500969 | 1588 | packet_check_eom(); |
7368a6c8 | 1589 | buffer_append(&stdout_buffer, data, data_len); |
7368a6c8 | 1590 | memset(data, 0, data_len); |
1591 | xfree(data); | |
1592 | } | |
396c147e | 1593 | static void |
7819b5c3 | 1594 | client_input_stderr_data(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1595 | { |
1e3b8b07 | 1596 | u_int data_len; |
7368a6c8 | 1597 | char *data = packet_get_string(&data_len); |
95500969 | 1598 | packet_check_eom(); |
7368a6c8 | 1599 | buffer_append(&stderr_buffer, data, data_len); |
7368a6c8 | 1600 | memset(data, 0, data_len); |
1601 | xfree(data); | |
1602 | } | |
396c147e | 1603 | static void |
7819b5c3 | 1604 | client_input_exit_status(int type, u_int32_t seq, void *ctxt) |
7368a6c8 | 1605 | { |
7368a6c8 | 1606 | exit_status = packet_get_int(); |
95500969 | 1607 | packet_check_eom(); |
7368a6c8 | 1608 | /* Acknowledge the exit. */ |
1609 | packet_start(SSH_CMSG_EXIT_CONFIRMATION); | |
1610 | packet_send(); | |
1611 | /* | |
1612 | * Must wait for packet to be sent since we are | |
1613 | * exiting the loop. | |
1614 | */ | |
1615 | packet_write_wait(); | |
1616 | /* Flag that we want to exit. */ | |
1617 | quit_pending = 1; | |
1618 | } | |
c15706e2 | 1619 | static void |
1620 | client_input_agent_open(int type, u_int32_t seq, void *ctxt) | |
1621 | { | |
1622 | Channel *c = NULL; | |
1623 | int remote_id, sock; | |
1624 | ||
1625 | /* Read the remote channel number from the message. */ | |
1626 | remote_id = packet_get_int(); | |
1627 | packet_check_eom(); | |
1628 | ||
1629 | /* | |
1630 | * Get a connection to the local authentication agent (this may again | |
1631 | * get forwarded). | |
1632 | */ | |
1633 | sock = ssh_get_authentication_socket(); | |
1634 | ||
1635 | /* | |
1636 | * If we could not connect the agent, send an error message back to | |
1637 | * the server. This should never happen unless the agent dies, | |
1638 | * because authentication forwarding is only enabled if we have an | |
1639 | * agent. | |
1640 | */ | |
1641 | if (sock >= 0) { | |
1642 | c = channel_new("", SSH_CHANNEL_OPEN, sock, sock, | |
1643 | -1, 0, 0, 0, "authentication agent connection", 1); | |
1644 | c->remote_id = remote_id; | |
1645 | c->force_drain = 1; | |
1646 | } | |
1647 | if (c == NULL) { | |
1648 | packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE); | |
1649 | packet_put_int(remote_id); | |
1650 | } else { | |
1651 | /* Send a confirmation to the remote host. */ | |
1652 | debug("Forwarding authentication connection."); | |
1653 | packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1654 | packet_put_int(remote_id); | |
1655 | packet_put_int(c->self); | |
1656 | } | |
1657 | packet_send(); | |
1658 | } | |
7368a6c8 | 1659 | |
396c147e | 1660 | static Channel * |
fa08c86b | 1661 | client_request_forwarded_tcpip(const char *request_type, int rchan) |
1662 | { | |
343288b8 | 1663 | Channel *c = NULL; |
fa08c86b | 1664 | char *listen_address, *originator_address; |
1665 | int listen_port, originator_port; | |
719fc62f | 1666 | int sock; |
fa08c86b | 1667 | |
1668 | /* Get rest of the packet */ | |
1669 | listen_address = packet_get_string(NULL); | |
1670 | listen_port = packet_get_int(); | |
1671 | originator_address = packet_get_string(NULL); | |
1672 | originator_port = packet_get_int(); | |
95500969 | 1673 | packet_check_eom(); |
fa08c86b | 1674 | |
1675 | debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d", | |
1676 | listen_address, listen_port, originator_address, originator_port); | |
1677 | ||
b3f8a79c | 1678 | sock = channel_connect_by_listen_address(listen_port); |
719fc62f | 1679 | if (sock < 0) { |
1680 | xfree(originator_address); | |
1681 | xfree(listen_address); | |
1682 | return NULL; | |
1683 | } | |
1684 | c = channel_new("forwarded-tcpip", | |
1685 | SSH_CHANNEL_CONNECTING, sock, sock, -1, | |
1686 | CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, | |
0d942eff | 1687 | originator_address, 1); |
fa08c86b | 1688 | xfree(originator_address); |
1689 | xfree(listen_address); | |
1690 | return c; | |
1691 | } | |
1692 | ||
343288b8 | 1693 | static Channel * |
fa08c86b | 1694 | client_request_x11(const char *request_type, int rchan) |
1695 | { | |
1696 | Channel *c = NULL; | |
1697 | char *originator; | |
1698 | int originator_port; | |
719fc62f | 1699 | int sock; |
fa08c86b | 1700 | |
1701 | if (!options.forward_x11) { | |
1702 | error("Warning: ssh server tried X11 forwarding."); | |
1908529f | 1703 | error("Warning: this is probably a break-in attempt by a malicious server."); |
fa08c86b | 1704 | return NULL; |
1705 | } | |
1706 | originator = packet_get_string(NULL); | |
1707 | if (datafellows & SSH_BUG_X11FWD) { | |
1708 | debug2("buggy server: x11 request w/o originator_port"); | |
1709 | originator_port = 0; | |
1710 | } else { | |
1711 | originator_port = packet_get_int(); | |
1712 | } | |
95500969 | 1713 | packet_check_eom(); |
fa08c86b | 1714 | /* XXX check permission */ |
865ac82e | 1715 | debug("client_request_x11: request from %s %d", originator, |
1716 | originator_port); | |
719fc62f | 1717 | xfree(originator); |
fa08c86b | 1718 | sock = x11_connect_display(); |
719fc62f | 1719 | if (sock < 0) |
1720 | return NULL; | |
1721 | c = channel_new("x11", | |
1722 | SSH_CHANNEL_X11_OPEN, sock, sock, -1, | |
0d942eff | 1723 | CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1); |
a5f82435 | 1724 | c->force_drain = 1; |
fa08c86b | 1725 | return c; |
1726 | } | |
1727 | ||
343288b8 | 1728 | static Channel * |
fa08c86b | 1729 | client_request_agent(const char *request_type, int rchan) |
1730 | { | |
1731 | Channel *c = NULL; | |
719fc62f | 1732 | int sock; |
fa08c86b | 1733 | |
1734 | if (!options.forward_agent) { | |
1735 | error("Warning: ssh server tried agent forwarding."); | |
1908529f | 1736 | error("Warning: this is probably a break-in attempt by a malicious server."); |
fa08c86b | 1737 | return NULL; |
1738 | } | |
1739 | sock = ssh_get_authentication_socket(); | |
719fc62f | 1740 | if (sock < 0) |
1741 | return NULL; | |
1742 | c = channel_new("authentication agent connection", | |
1743 | SSH_CHANNEL_OPEN, sock, sock, -1, | |
1744 | CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, | |
0d942eff | 1745 | "authentication agent connection", 1); |
a5f82435 | 1746 | c->force_drain = 1; |
fa08c86b | 1747 | return c; |
1748 | } | |
1749 | ||
0b242b12 | 1750 | /* XXXX move to generic input handler */ |
396c147e | 1751 | static void |
7819b5c3 | 1752 | client_input_channel_open(int type, u_int32_t seq, void *ctxt) |
0b242b12 | 1753 | { |
1754 | Channel *c = NULL; | |
1755 | char *ctype; | |
0b242b12 | 1756 | int rchan; |
f91d9a89 | 1757 | u_int rmaxpack, rwindow, len; |
0b242b12 | 1758 | |
1759 | ctype = packet_get_string(&len); | |
1760 | rchan = packet_get_int(); | |
1761 | rwindow = packet_get_int(); | |
1762 | rmaxpack = packet_get_int(); | |
1763 | ||
1d1ffb87 | 1764 | debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
0b242b12 | 1765 | ctype, rchan, rwindow, rmaxpack); |
1766 | ||
fa08c86b | 1767 | if (strcmp(ctype, "forwarded-tcpip") == 0) { |
1768 | c = client_request_forwarded_tcpip(ctype, rchan); | |
1769 | } else if (strcmp(ctype, "x11") == 0) { | |
1770 | c = client_request_x11(ctype, rchan); | |
1771 | } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { | |
1772 | c = client_request_agent(ctype, rchan); | |
0b242b12 | 1773 | } |
1774 | /* XXX duplicate : */ | |
1775 | if (c != NULL) { | |
1776 | debug("confirm %s", ctype); | |
1777 | c->remote_id = rchan; | |
1778 | c->remote_window = rwindow; | |
1779 | c->remote_maxpacket = rmaxpack; | |
a01a10dd | 1780 | if (c->type != SSH_CHANNEL_CONNECTING) { |
1781 | packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION); | |
1782 | packet_put_int(c->remote_id); | |
1783 | packet_put_int(c->self); | |
1784 | packet_put_int(c->local_window); | |
1785 | packet_put_int(c->local_maxpacket); | |
1786 | packet_send(); | |
1787 | } | |
0b242b12 | 1788 | } else { |
1789 | debug("failure %s", ctype); | |
1790 | packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE); | |
1791 | packet_put_int(rchan); | |
1792 | packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED); | |
fbe90f7b | 1793 | if (!(datafellows & SSH_BUG_OPENFAILURE)) { |
a01a10dd | 1794 | packet_put_cstring("open failed"); |
fbe90f7b | 1795 | packet_put_cstring(""); |
1796 | } | |
0b242b12 | 1797 | packet_send(); |
1798 | } | |
1799 | xfree(ctype); | |
1800 | } | |
396c147e | 1801 | static void |
7819b5c3 | 1802 | client_input_channel_req(int type, u_int32_t seq, void *ctxt) |
1fc8ccdf | 1803 | { |
1804 | Channel *c = NULL; | |
5e96b616 | 1805 | int exitval, id, reply, success = 0; |
1fc8ccdf | 1806 | char *rtype; |
1807 | ||
1808 | id = packet_get_int(); | |
1809 | rtype = packet_get_string(NULL); | |
1810 | reply = packet_get_char(); | |
1811 | ||
1812 | debug("client_input_channel_req: channel %d rtype %s reply %d", | |
1813 | id, rtype, reply); | |
1814 | ||
13de3560 | 1815 | if (id == -1) { |
1816 | error("client_input_channel_req: request for channel -1"); | |
1817 | } else if ((c = channel_lookup(id)) == NULL) { | |
1fc8ccdf | 1818 | error("client_input_channel_req: channel %d: unknown channel", id); |
1819 | } else if (strcmp(rtype, "exit-status") == 0) { | |
5e96b616 | 1820 | exitval = packet_get_int(); |
1821 | if (id == session_ident) { | |
1822 | success = 1; | |
1823 | exit_status = exitval; | |
1824 | } else if (c->ctl_fd == -1) { | |
1825 | error("client_input_channel_req: unexpected channel %d", | |
1826 | session_ident); | |
1827 | } else { | |
1828 | atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval)); | |
1829 | success = 1; | |
1830 | } | |
95500969 | 1831 | packet_check_eom(); |
1fc8ccdf | 1832 | } |
1833 | if (reply) { | |
1834 | packet_start(success ? | |
1835 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
13de3560 | 1836 | packet_put_int(id); |
1fc8ccdf | 1837 | packet_send(); |
1838 | } | |
1839 | xfree(rtype); | |
1840 | } | |
3d209bbe | 1841 | static void |
1842 | client_input_global_request(int type, u_int32_t seq, void *ctxt) | |
1843 | { | |
1844 | char *rtype; | |
1845 | int want_reply; | |
1846 | int success = 0; | |
1847 | ||
1848 | rtype = packet_get_string(NULL); | |
1849 | want_reply = packet_get_char(); | |
5d8d32a3 | 1850 | debug("client_input_global_request: rtype %s want_reply %d", |
1851 | rtype, want_reply); | |
3d209bbe | 1852 | if (want_reply) { |
1853 | packet_start(success ? | |
1854 | SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE); | |
1855 | packet_send(); | |
1856 | packet_write_wait(); | |
1857 | } | |
1858 | xfree(rtype); | |
1859 | } | |
0b242b12 | 1860 | |
5e96b616 | 1861 | void |
f2107e97 | 1862 | client_session2_setup(int id, int want_tty, int want_subsystem, |
1786be35 | 1863 | const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env, |
5e96b616 | 1864 | dispatch_fn *subsys_repl) |
1865 | { | |
1866 | int len; | |
2c9a4d41 | 1867 | Channel *c = NULL; |
5e96b616 | 1868 | |
1869 | debug2("%s: id %d", __func__, id); | |
1870 | ||
2c9a4d41 | 1871 | if ((c = channel_lookup(id)) == NULL) |
1872 | fatal("client_session2_setup: channel %d: unknown channel", id); | |
1873 | ||
5e96b616 | 1874 | if (want_tty) { |
1875 | struct winsize ws; | |
1876 | struct termios tio; | |
1877 | ||
1878 | /* Store window size in the packet. */ | |
1879 | if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0) | |
1880 | memset(&ws, 0, sizeof(ws)); | |
1881 | ||
1882 | channel_request_start(id, "pty-req", 0); | |
1883 | packet_put_cstring(term != NULL ? term : ""); | |
148de80c | 1884 | packet_put_int((u_int)ws.ws_col); |
1885 | packet_put_int((u_int)ws.ws_row); | |
1886 | packet_put_int((u_int)ws.ws_xpixel); | |
1887 | packet_put_int((u_int)ws.ws_ypixel); | |
5e96b616 | 1888 | tio = get_saved_tio(); |
1889 | tty_make_modes(-1, tiop != NULL ? tiop : &tio); | |
1890 | packet_send(); | |
1891 | /* XXX wait for reply */ | |
2c9a4d41 | 1892 | c->client_tty = 1; |
5e96b616 | 1893 | } |
1894 | ||
1895 | /* Transfer any environment variables from client to server */ | |
1786be35 | 1896 | if (options.num_send_env != 0 && env != NULL) { |
5e96b616 | 1897 | int i, j, matched; |
5e96b616 | 1898 | char *name, *val; |
1899 | ||
1900 | debug("Sending environment."); | |
1786be35 | 1901 | for (i = 0; env[i] != NULL; i++) { |
5e96b616 | 1902 | /* Split */ |
1786be35 | 1903 | name = xstrdup(env[i]); |
5e96b616 | 1904 | if ((val = strchr(name, '=')) == NULL) { |
8c4bd764 | 1905 | xfree(name); |
5e96b616 | 1906 | continue; |
1907 | } | |
1908 | *val++ = '\0'; | |
1909 | ||
1910 | matched = 0; | |
1911 | for (j = 0; j < options.num_send_env; j++) { | |
1912 | if (match_pattern(name, options.send_env[j])) { | |
1913 | matched = 1; | |
1914 | break; | |
1915 | } | |
1916 | } | |
1917 | if (!matched) { | |
1918 | debug3("Ignored env %s", name); | |
8c4bd764 | 1919 | xfree(name); |
5e96b616 | 1920 | continue; |
1921 | } | |
1922 | ||
1923 | debug("Sending env %s = %s", name, val); | |
1924 | channel_request_start(id, "env", 0); | |
1925 | packet_put_cstring(name); | |
1926 | packet_put_cstring(val); | |
1927 | packet_send(); | |
8c4bd764 | 1928 | xfree(name); |
5e96b616 | 1929 | } |
1930 | } | |
1931 | ||
1932 | len = buffer_len(cmd); | |
1933 | if (len > 0) { | |
1934 | if (len > 900) | |
1935 | len = 900; | |
1936 | if (want_subsystem) { | |
1937 | debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd)); | |
1938 | channel_request_start(id, "subsystem", subsys_repl != NULL); | |
1939 | if (subsys_repl != NULL) { | |
1940 | /* register callback for reply */ | |
1941 | /* XXX we assume that client_loop has already been called */ | |
1942 | dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl); | |
1943 | dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl); | |
1944 | } | |
1945 | } else { | |
1946 | debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd)); | |
1947 | channel_request_start(id, "exec", 0); | |
1948 | } | |
1949 | packet_put_string(buffer_ptr(cmd), buffer_len(cmd)); | |
1950 | packet_send(); | |
1951 | } else { | |
1952 | channel_request_start(id, "shell", 0); | |
1953 | packet_send(); | |
1954 | } | |
1955 | } | |
1956 | ||
396c147e | 1957 | static void |
5ca51e19 | 1958 | client_init_dispatch_20(void) |
8ce64345 | 1959 | { |
7a37c112 | 1960 | dispatch_init(&dispatch_protocol_error); |
e0ae8728 | 1961 | |
8ce64345 | 1962 | dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
1963 | dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data); | |
1964 | dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof); | |
1965 | dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data); | |
0b242b12 | 1966 | dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
8ce64345 | 1967 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
1968 | dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1fc8ccdf | 1969 | dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
8ce64345 | 1970 | dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
3d209bbe | 1971 | dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request); |
7a37c112 | 1972 | |
1973 | /* rekeying */ | |
1974 | dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit); | |
e0ae8728 | 1975 | |
1976 | /* global request reply messages */ | |
1977 | dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply); | |
1978 | dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply); | |
8ce64345 | 1979 | } |
396c147e | 1980 | static void |
5ca51e19 | 1981 | client_init_dispatch_13(void) |
7368a6c8 | 1982 | { |
1983 | dispatch_init(NULL); | |
1984 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); | |
1985 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation); | |
1986 | dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data); | |
7368a6c8 | 1987 | dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
1988 | dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); | |
1989 | dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); | |
7368a6c8 | 1990 | dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
1991 | dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); | |
1992 | dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); | |
a22aff1f | 1993 | |
1994 | dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? | |
c15706e2 | 1995 | &client_input_agent_open : &deny_input_open); |
a22aff1f | 1996 | dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
1997 | &x11_input_open : &deny_input_open); | |
7368a6c8 | 1998 | } |
396c147e | 1999 | static void |
5ca51e19 | 2000 | client_init_dispatch_15(void) |
7368a6c8 | 2001 | { |
2002 | client_init_dispatch_13(); | |
2003 | dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); | |
2004 | dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); | |
2005 | } | |
eea46d13 | 2006 | static void |
5ca51e19 | 2007 | client_init_dispatch(void) |
7368a6c8 | 2008 | { |
8ce64345 | 2009 | if (compat20) |
2010 | client_init_dispatch_20(); | |
2011 | else if (compat13) | |
7368a6c8 | 2012 | client_init_dispatch_13(); |
2013 | else | |
2014 | client_init_dispatch_15(); | |
2015 | } | |
82de775c | 2016 | |
2017 | /* client specific fatal cleanup */ | |
2018 | void | |
2362db19 | 2019 | cleanup_exit(int i) |
82de775c | 2020 | { |
82de775c | 2021 | leave_raw_mode(); |
2022 | leave_non_blocking(); | |
5e96b616 | 2023 | if (options.control_path != NULL && control_fd != -1) |
2024 | unlink(options.control_path); | |
2362db19 | 2025 | _exit(i); |
82de775c | 2026 | } |