Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.62
1.1 deraadt 1: /*
1.12 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
1.33 deraadt 5: * The main loop for the interactive session (client side).
1.20 markus 6: *
1.33 deraadt 7: * As far as I am concerned, the code I have written for this software
8: * can be used freely for any purpose. Any derived versions of this
9: * software must be clearly marked as such, and if the derived work is
10: * incompatible with the protocol description in the RFC file, it must be
11: * called by a name other than "ssh" or "Secure Shell".
12: *
13: *
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.
1.20 markus 35: *
36: *
1.33 deraadt 37: * SSH2 support added by Markus Friedl.
38: * Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
1.20 markus 39: *
1.33 deraadt 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.
1.12 deraadt 59: */
1.1 deraadt 60:
61: #include "includes.h"
1.62 ! stevesk 62: RCSID("$OpenBSD: clientloop.c,v 1.61 2001/04/08 11:27:33 markus Exp $");
1.1 deraadt 63:
1.45 markus 64: #include "ssh.h"
65: #include "ssh1.h"
66: #include "ssh2.h"
1.1 deraadt 67: #include "xmalloc.h"
68: #include "packet.h"
69: #include "buffer.h"
1.15 markus 70: #include "compat.h"
71: #include "channels.h"
72: #include "dispatch.h"
1.30 markus 73: #include "buffer.h"
74: #include "bufaux.h"
1.40 markus 75: #include "key.h"
1.54 markus 76: #include "kex.h"
1.45 markus 77: #include "log.h"
78: #include "readconf.h"
79: #include "clientloop.h"
1.40 markus 80: #include "authfd.h"
1.45 markus 81: #include "atomicio.h"
1.62 ! stevesk 82: #include "sshtty.h"
1.39 markus 83:
84: /* import options */
85: extern Options options;
86:
1.1 deraadt 87: /* Flag indicating that stdin should be redirected from /dev/null. */
88: extern int stdin_null_flag;
89:
1.13 markus 90: /*
91: * Name of the host we are connecting to. This is the name given on the
92: * command line, or the HostName specified for the user-supplied name in a
93: * configuration file.
94: */
1.1 deraadt 95: extern char *host;
96:
1.13 markus 97: /*
98: * Flag to indicate that we have received a window change signal which has
99: * not yet been processed. This will cause a message indicating the new
100: * window size to be sent to the server a little later. This is volatile
101: * because this is updated in a signal handler.
102: */
1.1 deraadt 103: static volatile int received_window_change_signal = 0;
104:
105: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
106: static int in_non_blocking_mode = 0;
107:
108: /* Common data for the client loop code. */
1.31 markus 109: static int quit_pending; /* Set to non-zero to quit the client loop. */
110: static int escape_char; /* Escape character. */
1.11 markus 111: static int escape_pending; /* Last character was the escape character */
112: static int last_was_cr; /* Last character was a newline. */
113: static int exit_status; /* Used to store the exit status of the command. */
114: static int stdin_eof; /* EOF has been encountered on standard error. */
115: static Buffer stdin_buffer; /* Buffer for stdin data. */
116: static Buffer stdout_buffer; /* Buffer for stdout data. */
117: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 118: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
119: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 120: static int connection_in; /* Connection to server (input). */
121: static int connection_out; /* Connection to server (output). */
1.56 markus 122: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 123: static int session_closed = 0; /* In SSH2: login session closed. */
1.1 deraadt 124:
1.16 markus 125: void client_init_dispatch(void);
126: int session_ident = -1;
127:
1.54 markus 128: /*XXX*/
129: extern Kex *xxx_kex;
130:
1.1 deraadt 131: /* Restores stdin to blocking mode. */
132:
1.20 markus 133: void
1.49 itojun 134: leave_non_blocking(void)
1.1 deraadt 135: {
1.11 markus 136: if (in_non_blocking_mode) {
137: (void) fcntl(fileno(stdin), F_SETFL, 0);
138: in_non_blocking_mode = 0;
139: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
140: }
1.1 deraadt 141: }
142:
1.11 markus 143: /* Puts stdin terminal in non-blocking mode. */
144:
1.20 markus 145: void
1.49 itojun 146: enter_non_blocking(void)
1.1 deraadt 147: {
1.11 markus 148: in_non_blocking_mode = 1;
149: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
150: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 151: }
152:
1.13 markus 153: /*
154: * Signal handler for the window change signal (SIGWINCH). This just sets a
155: * flag indicating that the window has changed.
156: */
1.1 deraadt 157:
1.20 markus 158: void
1.11 markus 159: window_change_handler(int sig)
1.1 deraadt 160: {
1.11 markus 161: received_window_change_signal = 1;
162: signal(SIGWINCH, window_change_handler);
1.1 deraadt 163: }
164:
1.13 markus 165: /*
166: * Signal handler for signals that cause the program to terminate. These
167: * signals must be trapped to restore terminal modes.
168: */
1.1 deraadt 169:
1.20 markus 170: void
1.11 markus 171: signal_handler(int sig)
1.1 deraadt 172: {
1.62 ! stevesk 173: if (in_raw_mode())
1.11 markus 174: leave_raw_mode();
175: if (in_non_blocking_mode)
176: leave_non_blocking();
177: channel_stop_listening();
178: packet_close();
179: fatal("Killed by signal %d.", sig);
1.1 deraadt 180: }
181:
1.13 markus 182: /*
183: * Returns current time in seconds from Jan 1, 1970 with the maximum
184: * available resolution.
185: */
1.1 deraadt 186:
1.20 markus 187: double
1.49 itojun 188: get_current_time(void)
1.1 deraadt 189: {
1.11 markus 190: struct timeval tv;
191: gettimeofday(&tv, NULL);
192: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 193: }
194:
1.13 markus 195: /*
196: * This is called when the interactive is entered. This checks if there is
197: * an EOF coming on stdin. We must check this explicitly, as select() does
198: * not appear to wake up when redirecting from /dev/null.
199: */
1.1 deraadt 200:
1.20 markus 201: void
1.49 itojun 202: client_check_initial_eof_on_stdin(void)
1.1 deraadt 203: {
1.11 markus 204: int len;
205: char buf[1];
1.1 deraadt 206:
1.13 markus 207: /*
208: * If standard input is to be "redirected from /dev/null", we simply
209: * mark that we have seen an EOF and send an EOF message to the
210: * server. Otherwise, we try to read a single character; it appears
211: * that for some files, such /dev/null, select() never wakes up for
212: * read for this descriptor, which means that we never get EOF. This
213: * way we will get the EOF if stdin comes from /dev/null or similar.
214: */
1.11 markus 215: if (stdin_null_flag) {
216: /* Fake EOF on stdin. */
217: debug("Sending eof.");
218: stdin_eof = 1;
219: packet_start(SSH_CMSG_EOF);
220: packet_send();
221: } else {
222: enter_non_blocking();
223:
224: /* Check for immediate EOF on stdin. */
225: len = read(fileno(stdin), buf, 1);
226: if (len == 0) {
1.13 markus 227: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 228: debug("Sending eof.");
229: stdin_eof = 1;
230: packet_start(SSH_CMSG_EOF);
231: packet_send();
232: } else if (len > 0) {
1.13 markus 233: /*
234: * Got data. We must store the data in the buffer,
235: * and also process it as an escape character if
236: * appropriate.
237: */
1.42 markus 238: if ((u_char) buf[0] == escape_char)
1.11 markus 239: escape_pending = 1;
1.52 markus 240: else
1.11 markus 241: buffer_append(&stdin_buffer, buf, 1);
242: }
243: leave_non_blocking();
244: }
1.1 deraadt 245: }
246:
247:
1.13 markus 248: /*
249: * Make packets from buffered stdin data, and buffer them for sending to the
250: * connection.
251: */
1.1 deraadt 252:
1.20 markus 253: void
1.49 itojun 254: client_make_packets_from_stdin_data(void)
1.1 deraadt 255: {
1.42 markus 256: u_int len;
1.1 deraadt 257:
1.11 markus 258: /* Send buffered stdin data to the server. */
259: while (buffer_len(&stdin_buffer) > 0 &&
260: packet_not_very_much_data_to_write()) {
261: len = buffer_len(&stdin_buffer);
262: /* Keep the packets at reasonable size. */
263: if (len > packet_get_maxsize())
264: len = packet_get_maxsize();
265: packet_start(SSH_CMSG_STDIN_DATA);
266: packet_put_string(buffer_ptr(&stdin_buffer), len);
267: packet_send();
268: buffer_consume(&stdin_buffer, len);
1.52 markus 269: stdin_bytes += len;
1.11 markus 270: /* If we have a pending EOF, send it now. */
271: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
272: packet_start(SSH_CMSG_EOF);
273: packet_send();
274: }
1.1 deraadt 275: }
276: }
277:
1.13 markus 278: /*
279: * Checks if the client window has changed, and sends a packet about it to
280: * the server if so. The actual change is detected elsewhere (by a software
281: * interrupt on Unix); this just checks the flag and sends a message if
282: * appropriate.
283: */
1.1 deraadt 284:
1.20 markus 285: void
1.49 itojun 286: client_check_window_change(void)
1.1 deraadt 287: {
1.16 markus 288: struct winsize ws;
289:
290: if (! received_window_change_signal)
291: return;
292: /** XXX race */
293: received_window_change_signal = 0;
294:
295: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
296: return;
297:
1.37 markus 298: debug2("client_check_window_change: changed");
1.16 markus 299:
300: if (compat20) {
301: channel_request_start(session_ident, "window-change", 0);
302: packet_put_int(ws.ws_col);
303: packet_put_int(ws.ws_row);
304: packet_put_int(ws.ws_xpixel);
305: packet_put_int(ws.ws_ypixel);
306: packet_send();
307: } else {
308: packet_start(SSH_CMSG_WINDOW_SIZE);
309: packet_put_int(ws.ws_row);
310: packet_put_int(ws.ws_col);
311: packet_put_int(ws.ws_xpixel);
312: packet_put_int(ws.ws_ypixel);
313: packet_send();
1.1 deraadt 314: }
315: }
316:
1.13 markus 317: /*
318: * Waits until the client can do something (some data becomes available on
319: * one of the file descriptors).
320: */
1.1 deraadt 321:
1.20 markus 322: void
1.46 markus 323: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.56 markus 324: int *maxfdp, int rekeying)
1.11 markus 325: {
1.46 markus 326: /* Add any selections by the channel mechanism. */
1.56 markus 327: channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
1.11 markus 328:
1.16 markus 329: if (!compat20) {
1.17 markus 330: /* Read from the connection, unless our buffers are full. */
1.16 markus 331: if (buffer_len(&stdout_buffer) < buffer_high &&
332: buffer_len(&stderr_buffer) < buffer_high &&
333: channel_not_very_much_buffered_data())
1.46 markus 334: FD_SET(connection_in, *readsetp);
1.17 markus 335: /*
336: * Read from stdin, unless we have seen EOF or have very much
337: * buffered data to send to the server.
338: */
339: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 340: FD_SET(fileno(stdin), *readsetp);
1.17 markus 341:
342: /* Select stdout/stderr if have data in buffer. */
343: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 344: FD_SET(fileno(stdout), *writesetp);
1.17 markus 345: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 346: FD_SET(fileno(stderr), *writesetp);
1.16 markus 347: } else {
1.46 markus 348: FD_SET(connection_in, *readsetp);
1.16 markus 349: }
1.11 markus 350:
351: /* Select server connection if have data to write to the server. */
352: if (packet_have_data_to_write())
1.46 markus 353: FD_SET(connection_out, *writesetp);
1.11 markus 354:
1.13 markus 355: /*
356: * Wait for something to happen. This will suspend the process until
357: * some selected descriptor can be read, written, or has some other
358: * event pending. Note: if you want to implement SSH_MSG_IGNORE
359: * messages to fool traffic analysis, this might be the place to do
360: * it: just have a random timeout for the select, and send a random
361: * SSH_MSG_IGNORE packet when the timeout expires.
362: */
1.11 markus 363:
1.46 markus 364: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 365: char buf[100];
1.51 markus 366:
367: /*
368: * We have to clear the select masks, because we return.
369: * We have to return, because the mainloop checks for the flags
370: * set by the signal handlers.
371: */
372: memset(*readsetp, 0, *maxfdp);
373: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 374:
1.11 markus 375: if (errno == EINTR)
376: return;
377: /* Note: we might still have data in the buffers. */
378: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
379: buffer_append(&stderr_buffer, buf, strlen(buf));
380: quit_pending = 1;
381: }
382: }
383:
1.20 markus 384: void
1.31 markus 385: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 386: {
1.11 markus 387: struct winsize oldws, newws;
388:
389: /* Flush stdout and stderr buffers. */
1.31 markus 390: if (buffer_len(bout) > 0)
391: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
392: if (buffer_len(berr) > 0)
393: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 394:
395: leave_raw_mode();
396:
1.13 markus 397: /*
398: * Free (and clear) the buffer to reduce the amount of data that gets
399: * written to swap.
400: */
1.31 markus 401: buffer_free(bin);
402: buffer_free(bout);
403: buffer_free(berr);
1.11 markus 404:
405: /* Save old window size. */
406: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
407:
408: /* Send the suspend signal to the program itself. */
409: kill(getpid(), SIGTSTP);
410:
411: /* Check if the window size has changed. */
412: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
413: (oldws.ws_row != newws.ws_row ||
414: oldws.ws_col != newws.ws_col ||
415: oldws.ws_xpixel != newws.ws_xpixel ||
416: oldws.ws_ypixel != newws.ws_ypixel))
417: received_window_change_signal = 1;
418:
419: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 420: buffer_init(bin);
421: buffer_init(bout);
422: buffer_init(berr);
1.11 markus 423:
424: enter_raw_mode();
425: }
426:
1.20 markus 427: void
1.17 markus 428: client_process_net_input(fd_set * readset)
1.11 markus 429: {
1.17 markus 430: int len;
431: char buf[8192];
1.11 markus 432:
1.13 markus 433: /*
434: * Read input from the server, and add any such data to the buffer of
435: * the packet subsystem.
436: */
1.11 markus 437: if (FD_ISSET(connection_in, readset)) {
438: /* Read as much as possible. */
439: len = read(connection_in, buf, sizeof(buf));
440: if (len == 0) {
441: /* Received EOF. The remote host has closed the connection. */
442: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
443: host);
1.1 deraadt 444: buffer_append(&stderr_buffer, buf, strlen(buf));
445: quit_pending = 1;
446: return;
1.11 markus 447: }
1.13 markus 448: /*
449: * There is a kernel bug on Solaris that causes select to
450: * sometimes wake up even though there is no data available.
451: */
1.53 millert 452: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 453: len = 0;
454:
455: if (len < 0) {
456: /* An error has encountered. Perhaps there is a network problem. */
457: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
458: host, strerror(errno));
459: buffer_append(&stderr_buffer, buf, strlen(buf));
460: quit_pending = 1;
461: return;
462: }
463: packet_process_incoming(buf, len);
464: }
1.17 markus 465: }
1.16 markus 466:
1.31 markus 467: /* process the characters one by one */
468: int
469: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
470: {
1.32 markus 471: char string[1024];
1.31 markus 472: pid_t pid;
473: int bytes = 0;
1.42 markus 474: u_int i;
475: u_char ch;
1.31 markus 476: char *s;
477:
478: for (i = 0; i < len; i++) {
479: /* Get one character at a time. */
480: ch = buf[i];
481:
482: if (escape_pending) {
483: /* We have previously seen an escape character. */
484: /* Clear the flag now. */
485: escape_pending = 0;
486:
487: /* Process the escaped character. */
488: switch (ch) {
489: case '.':
490: /* Terminate the connection. */
1.32 markus 491: snprintf(string, sizeof string, "%c.\r\n", escape_char);
492: buffer_append(berr, string, strlen(string));
1.31 markus 493:
494: quit_pending = 1;
495: return -1;
496:
497: case 'Z' - 64:
498: /* Suspend the program. */
499: /* Print a message to that effect to the user. */
1.32 markus 500: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
501: buffer_append(berr, string, strlen(string));
1.31 markus 502:
503: /* Restore terminal modes and suspend. */
504: client_suspend_self(bin, bout, berr);
505:
506: /* We have been continued. */
507: continue;
508:
1.54 markus 509: case 'R':
1.59 markus 510: if (compat20) {
511: if (datafellows & SSH_BUG_NOREKEY)
512: log("Server does not support re-keying");
513: else
514: need_rekeying = 1;
515: }
1.54 markus 516: continue;
517:
1.31 markus 518: case '&':
519: /* XXX does not work yet with proto 2 */
520: if (compat20)
521: continue;
522: /*
523: * Detach the program (continue to serve connections,
524: * but put in background and no more new connections).
525: */
526: if (!stdin_eof) {
527: /*
528: * Sending SSH_CMSG_EOF alone does not always appear
529: * to be enough. So we try to send an EOF character
530: * first.
531: */
532: packet_start(SSH_CMSG_STDIN_DATA);
533: packet_put_string("\004", 1);
534: packet_send();
535: /* Close stdin. */
536: stdin_eof = 1;
537: if (buffer_len(bin) == 0) {
538: packet_start(SSH_CMSG_EOF);
539: packet_send();
540: }
541: }
542: /* Restore tty modes. */
543: leave_raw_mode();
544:
545: /* Stop listening for new connections. */
546: channel_stop_listening();
547:
548: printf("%c& [backgrounded]\n", escape_char);
549:
550: /* Fork into background. */
551: pid = fork();
552: if (pid < 0) {
553: error("fork: %.100s", strerror(errno));
554: continue;
555: }
556: if (pid != 0) { /* This is the parent. */
557: /* The parent just exits. */
558: exit(0);
559: }
560: /* The child continues serving connections. */
561: continue; /*XXX ? */
562:
563: case '?':
1.32 markus 564: snprintf(string, sizeof string,
1.31 markus 565: "%c?\r\n\
566: Supported escape sequences:\r\n\
567: ~. - terminate connection\r\n\
568: ~^Z - suspend ssh\r\n\
569: ~# - list forwarded connections\r\n\
570: ~& - background ssh (when waiting for connections to terminate)\r\n\
571: ~? - this message\r\n\
572: ~~ - send the escape character by typing it twice\r\n\
573: (Note that escapes are only recognized immediately after newline.)\r\n",
574: escape_char);
1.32 markus 575: buffer_append(berr, string, strlen(string));
1.31 markus 576: continue;
577:
578: case '#':
1.32 markus 579: snprintf(string, sizeof string, "%c#\r\n", escape_char);
580: buffer_append(berr, string, strlen(string));
1.31 markus 581: s = channel_open_message();
582: buffer_append(berr, s, strlen(s));
583: xfree(s);
584: continue;
585:
586: default:
587: if (ch != escape_char) {
588: buffer_put_char(bin, escape_char);
589: bytes++;
590: }
591: /* Escaped characters fall through here */
592: break;
593: }
594: } else {
595: /*
596: * The previous character was not an escape char. Check if this
597: * is an escape.
598: */
599: if (last_was_cr && ch == escape_char) {
600: /* It is. Set the flag and continue to next character. */
601: escape_pending = 1;
602: continue;
603: }
604: }
605:
606: /*
607: * Normal character. Record whether it was a newline,
608: * and append it to the buffer.
609: */
610: last_was_cr = (ch == '\r' || ch == '\n');
611: buffer_put_char(bin, ch);
612: bytes++;
613: }
614: return bytes;
615: }
616:
1.20 markus 617: void
1.17 markus 618: client_process_input(fd_set * readset)
619: {
1.21 deraadt 620: int len;
1.31 markus 621: char buf[8192];
1.16 markus 622:
1.11 markus 623: /* Read input from stdin. */
624: if (FD_ISSET(fileno(stdin), readset)) {
625: /* Read as much as possible. */
626: len = read(fileno(stdin), buf, sizeof(buf));
627: if (len <= 0) {
1.13 markus 628: /*
629: * Received EOF or error. They are treated
630: * similarly, except that an error message is printed
631: * if it was an error condition.
632: */
1.11 markus 633: if (len < 0) {
634: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
635: buffer_append(&stderr_buffer, buf, strlen(buf));
636: }
637: /* Mark that we have seen EOF. */
638: stdin_eof = 1;
1.13 markus 639: /*
640: * Send an EOF message to the server unless there is
641: * data in the buffer. If there is data in the
642: * buffer, no message will be sent now. Code
643: * elsewhere will send the EOF when the buffer
644: * becomes empty if stdin_eof is set.
645: */
1.11 markus 646: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 647: packet_start(SSH_CMSG_EOF);
648: packet_send();
1.11 markus 649: }
650: } else if (escape_char == -1) {
1.13 markus 651: /*
652: * Normal successful read, and no escape character.
653: * Just append the data to buffer.
654: */
1.11 markus 655: buffer_append(&stdin_buffer, buf, len);
656: } else {
1.13 markus 657: /*
658: * Normal, successful read. But we have an escape character
659: * and have to process the characters one by one.
660: */
1.52 markus 661: if (process_escapes(&stdin_buffer, &stdout_buffer,
662: &stderr_buffer, buf, len) == -1)
1.31 markus 663: return;
1.11 markus 664: }
665: }
666: }
667:
1.20 markus 668: void
1.11 markus 669: client_process_output(fd_set * writeset)
670: {
671: int len;
672: char buf[100];
1.1 deraadt 673:
1.11 markus 674: /* Write buffered output to stdout. */
675: if (FD_ISSET(fileno(stdout), writeset)) {
676: /* Write as much data as possible. */
677: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 678: buffer_len(&stdout_buffer));
1.11 markus 679: if (len <= 0) {
680: if (errno == EAGAIN)
681: len = 0;
682: else {
1.13 markus 683: /*
684: * An error or EOF was encountered. Put an
685: * error message to stderr buffer.
686: */
1.11 markus 687: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
688: buffer_append(&stderr_buffer, buf, strlen(buf));
689: quit_pending = 1;
690: return;
691: }
692: }
693: /* Consume printed data from the buffer. */
694: buffer_consume(&stdout_buffer, len);
1.57 markus 695: stdout_bytes += len;
1.11 markus 696: }
697: /* Write buffered output to stderr. */
698: if (FD_ISSET(fileno(stderr), writeset)) {
699: /* Write as much data as possible. */
700: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 701: buffer_len(&stderr_buffer));
1.11 markus 702: if (len <= 0) {
703: if (errno == EAGAIN)
704: len = 0;
705: else {
1.13 markus 706: /* EOF or error, but can't even print error message. */
1.11 markus 707: quit_pending = 1;
708: return;
709: }
710: }
711: /* Consume printed characters from the buffer. */
712: buffer_consume(&stderr_buffer, len);
1.57 markus 713: stderr_bytes += len;
1.11 markus 714: }
1.1 deraadt 715: }
716:
1.13 markus 717: /*
1.15 markus 718: * Get packets from the connection input buffer, and process them as long as
719: * there are packets available.
720: *
721: * Any unknown packets received during the actual
722: * session cause the session to terminate. This is
723: * intended to make debugging easier since no
724: * confirmations are sent. Any compatible protocol
725: * extensions must be negotiated during the
726: * preparatory phase.
727: */
728:
1.20 markus 729: void
1.49 itojun 730: client_process_buffered_input_packets(void)
1.15 markus 731: {
1.54 markus 732: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 733: }
734:
1.31 markus 735: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 736:
737: int
1.31 markus 738: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 739: {
1.31 markus 740: /* XXX we assume c->extended is writeable */
741: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 742: }
743:
1.60 markus 744: void
745: client_channel_closed(int id, void *arg)
746: {
747: if (id != session_ident)
748: error("client_channel_closed: id %d != session_ident %d",
749: id, session_ident);
750: session_closed = 1;
1.62 ! stevesk 751: if (in_raw_mode())
1.61 markus 752: leave_raw_mode();
1.60 markus 753: }
754:
1.15 markus 755: /*
1.13 markus 756: * Implements the interactive session with the server. This is called after
757: * the user has been authenticated, and a command has been started on the
758: * remote host. If escape_char != -1, it is the character used as an escape
759: * character for terminating or suspending the session.
760: */
1.1 deraadt 761:
1.20 markus 762: int
1.30 markus 763: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 764: {
1.46 markus 765: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 766: double start_time, total_time;
1.56 markus 767: int max_fd = 0, len, rekeying = 0;
1.11 markus 768: char buf[100];
769:
770: debug("Entering interactive session.");
771:
772: start_time = get_current_time();
773:
774: /* Initialize variables. */
775: escape_pending = 0;
776: last_was_cr = 1;
777: exit_status = -1;
778: stdin_eof = 0;
779: buffer_high = 64 * 1024;
780: connection_in = packet_get_connection_in();
781: connection_out = packet_get_connection_out();
1.46 markus 782: max_fd = MAX(connection_in, connection_out);
783:
784: if (!compat20) {
785: max_fd = MAX(max_fd, fileno(stdin));
786: max_fd = MAX(max_fd, fileno(stdout));
787: max_fd = MAX(max_fd, fileno(stderr));
788: }
1.11 markus 789: stdin_bytes = 0;
790: stdout_bytes = 0;
791: stderr_bytes = 0;
792: quit_pending = 0;
793: escape_char = escape_char_arg;
794:
795: /* Initialize buffers. */
796: buffer_init(&stdin_buffer);
797: buffer_init(&stdout_buffer);
798: buffer_init(&stderr_buffer);
799:
1.15 markus 800: client_init_dispatch();
801:
1.11 markus 802: /* Set signal handlers to restore non-blocking mode. */
803: signal(SIGINT, signal_handler);
804: signal(SIGQUIT, signal_handler);
805: signal(SIGTERM, signal_handler);
806: signal(SIGPIPE, SIG_IGN);
807: if (have_pty)
808: signal(SIGWINCH, window_change_handler);
809:
810: if (have_pty)
811: enter_raw_mode();
812:
1.48 markus 813: if (compat20) {
814: session_ident = ssh2_chan_id;
815: if (escape_char != -1)
816: channel_register_filter(session_ident,
817: simple_escape_filter);
1.60 markus 818: if (session_ident != -1)
819: channel_register_cleanup(session_ident,
820: client_channel_closed);
1.48 markus 821: } else {
822: /* Check if we should immediately send eof on stdin. */
1.16 markus 823: client_check_initial_eof_on_stdin();
1.48 markus 824: }
1.30 markus 825:
1.11 markus 826: /* Main loop of the client for the interactive session mode. */
827: while (!quit_pending) {
828:
1.13 markus 829: /* Process buffered packets sent by the server. */
1.11 markus 830: client_process_buffered_input_packets();
831:
1.60 markus 832: if (compat20 && session_closed && !channel_still_open())
833: break;
834:
1.56 markus 835: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 836:
1.56 markus 837: if (rekeying) {
838: debug("rekeying in progress");
839: } else {
840: /*
841: * Make packets of buffered stdin data, and buffer
842: * them for sending to the server.
843: */
844: if (!compat20)
845: client_make_packets_from_stdin_data();
1.11 markus 846:
1.56 markus 847: /*
848: * Make packets from buffered channel data, and
849: * enqueue them for sending to the server.
850: */
851: if (packet_not_very_much_data_to_write())
852: channel_output_poll();
1.11 markus 853:
1.56 markus 854: /*
855: * Check if the window size has changed, and buffer a
856: * message about it to the server if so.
857: */
858: client_check_window_change();
1.11 markus 859:
1.56 markus 860: if (quit_pending)
861: break;
862: }
1.13 markus 863: /*
864: * Wait until we have something to do (something becomes
865: * available on one of the descriptors).
866: */
1.56 markus 867: client_wait_until_can_do_something(&readset, &writeset,
868: &max_fd, rekeying);
1.11 markus 869:
870: if (quit_pending)
871: break;
872:
1.56 markus 873: /* Do channel operations unless rekeying in progress. */
874: if (!rekeying) {
875: channel_after_select(readset, writeset);
876:
877: if (need_rekeying) {
878: debug("user requests rekeying");
879: xxx_kex->done = 0;
880: kex_send_kexinit(xxx_kex);
881: need_rekeying = 0;
882: }
883: }
1.11 markus 884:
1.17 markus 885: /* Buffer input from the connection. */
1.46 markus 886: client_process_net_input(readset);
1.17 markus 887:
888: if (quit_pending)
889: break;
1.11 markus 890:
1.17 markus 891: if (!compat20) {
892: /* Buffer data from stdin */
1.46 markus 893: client_process_input(readset);
1.17 markus 894: /*
895: * Process output to stdout and stderr. Output to
896: * the connection is processed elsewhere (above).
897: */
1.46 markus 898: client_process_output(writeset);
1.17 markus 899: }
1.11 markus 900:
1.13 markus 901: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 902: if (FD_ISSET(connection_out, writeset))
1.11 markus 903: packet_write_poll();
904: }
1.46 markus 905: if (readset)
906: xfree(readset);
907: if (writeset)
908: xfree(writeset);
1.11 markus 909:
910: /* Terminate the session. */
911:
912: /* Stop watching for window change. */
913: if (have_pty)
914: signal(SIGWINCH, SIG_DFL);
915:
916: /* Stop listening for connections. */
917: channel_stop_listening();
918:
1.13 markus 919: /*
920: * In interactive mode (with pseudo tty) display a message indicating
921: * that the connection has been closed.
922: */
1.11 markus 923: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
924: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
925: buffer_append(&stderr_buffer, buf, strlen(buf));
926: }
927: /* Output any buffered data for stdout. */
928: while (buffer_len(&stdout_buffer) > 0) {
929: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 930: buffer_len(&stdout_buffer));
1.11 markus 931: if (len <= 0) {
932: error("Write failed flushing stdout buffer.");
933: break;
934: }
935: buffer_consume(&stdout_buffer, len);
1.57 markus 936: stdout_bytes += len;
1.11 markus 937: }
938:
939: /* Output any buffered data for stderr. */
940: while (buffer_len(&stderr_buffer) > 0) {
941: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 942: buffer_len(&stderr_buffer));
1.11 markus 943: if (len <= 0) {
944: error("Write failed flushing stderr buffer.");
945: break;
946: }
947: buffer_consume(&stderr_buffer, len);
1.57 markus 948: stderr_bytes += len;
1.11 markus 949: }
950:
951: if (have_pty)
952: leave_raw_mode();
953:
954: /* Clear and free any buffers. */
955: memset(buf, 0, sizeof(buf));
956: buffer_free(&stdin_buffer);
957: buffer_free(&stdout_buffer);
958: buffer_free(&stderr_buffer);
959:
960: /* Report bytes transferred, and transfer rates. */
961: total_time = get_current_time() - start_time;
962: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
963: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
964: if (total_time > 0)
965: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
966: stdin_bytes / total_time, stdout_bytes / total_time,
967: stderr_bytes / total_time);
968:
969: /* Return the exit status of the program. */
970: debug("Exit status %d", exit_status);
971: return exit_status;
1.15 markus 972: }
973:
974: /*********/
975:
976: void
1.36 markus 977: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 978: {
1.42 markus 979: u_int data_len;
1.15 markus 980: char *data = packet_get_string(&data_len);
981: packet_integrity_check(plen, 4 + data_len, type);
982: buffer_append(&stdout_buffer, data, data_len);
983: memset(data, 0, data_len);
984: xfree(data);
985: }
986: void
1.36 markus 987: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 988: {
1.42 markus 989: u_int data_len;
1.15 markus 990: char *data = packet_get_string(&data_len);
991: packet_integrity_check(plen, 4 + data_len, type);
992: buffer_append(&stderr_buffer, data, data_len);
993: memset(data, 0, data_len);
994: xfree(data);
995: }
996: void
1.36 markus 997: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 998: {
999: packet_integrity_check(plen, 4, type);
1000: exit_status = packet_get_int();
1001: /* Acknowledge the exit. */
1002: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1003: packet_send();
1004: /*
1005: * Must wait for packet to be sent since we are
1006: * exiting the loop.
1007: */
1008: packet_write_wait();
1009: /* Flag that we want to exit. */
1010: quit_pending = 1;
1011: }
1012:
1.40 markus 1013: Channel *
1014: client_request_forwarded_tcpip(const char *request_type, int rchan)
1015: {
1016: Channel* c = NULL;
1017: char *listen_address, *originator_address;
1018: int listen_port, originator_port;
1019: int sock, newch;
1020:
1021: /* Get rest of the packet */
1022: listen_address = packet_get_string(NULL);
1023: listen_port = packet_get_int();
1024: originator_address = packet_get_string(NULL);
1025: originator_port = packet_get_int();
1026: packet_done();
1027:
1028: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1029: listen_address, listen_port, originator_address, originator_port);
1030:
1031: sock = channel_connect_by_listen_adress(listen_port);
1032: if (sock >= 0) {
1033: newch = channel_new("forwarded-tcpip",
1.41 markus 1034: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1035: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1036: xstrdup(originator_address), 1);
1037: c = channel_lookup(newch);
1038: }
1039: xfree(originator_address);
1040: xfree(listen_address);
1041: return c;
1042: }
1043:
1044: Channel*
1045: client_request_x11(const char *request_type, int rchan)
1046: {
1047: Channel *c = NULL;
1048: char *originator;
1049: int originator_port;
1050: int sock, newch;
1051:
1052: if (!options.forward_x11) {
1053: error("Warning: ssh server tried X11 forwarding.");
1054: error("Warning: this is probably a break in attempt by a malicious server.");
1055: return NULL;
1056: }
1057: originator = packet_get_string(NULL);
1058: if (datafellows & SSH_BUG_X11FWD) {
1059: debug2("buggy server: x11 request w/o originator_port");
1060: originator_port = 0;
1061: } else {
1062: originator_port = packet_get_int();
1063: }
1064: packet_done();
1065: /* XXX check permission */
1.47 markus 1066: debug("client_request_x11: request from %s %d", originator,
1067: originator_port);
1.40 markus 1068: sock = x11_connect_display();
1069: if (sock >= 0) {
1070: newch = channel_new("x11",
1071: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1072: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1073: xstrdup("x11"), 1);
1074: c = channel_lookup(newch);
1075: }
1076: xfree(originator);
1077: return c;
1078: }
1079:
1080: Channel*
1081: client_request_agent(const char *request_type, int rchan)
1082: {
1083: Channel *c = NULL;
1084: int sock, newch;
1085:
1086: if (!options.forward_agent) {
1087: error("Warning: ssh server tried agent forwarding.");
1088: error("Warning: this is probably a break in attempt by a malicious server.");
1089: return NULL;
1090: }
1091: sock = ssh_get_authentication_socket();
1092: if (sock >= 0) {
1093: newch = channel_new("authentication agent connection",
1094: SSH_CHANNEL_OPEN, sock, sock, -1,
1095: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1096: xstrdup("authentication agent connection"), 1);
1097: c = channel_lookup(newch);
1098: }
1099: return c;
1100: }
1101:
1.22 markus 1102: /* XXXX move to generic input handler */
1103: void
1.36 markus 1104: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1105: {
1106: Channel *c = NULL;
1107: char *ctype;
1.42 markus 1108: u_int len;
1.22 markus 1109: int rchan;
1110: int rmaxpack;
1111: int rwindow;
1112:
1113: ctype = packet_get_string(&len);
1114: rchan = packet_get_int();
1115: rwindow = packet_get_int();
1116: rmaxpack = packet_get_int();
1117:
1.24 markus 1118: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1119: ctype, rchan, rwindow, rmaxpack);
1120:
1.40 markus 1121: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1122: c = client_request_forwarded_tcpip(ctype, rchan);
1123: } else if (strcmp(ctype, "x11") == 0) {
1124: c = client_request_x11(ctype, rchan);
1125: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1126: c = client_request_agent(ctype, rchan);
1.22 markus 1127: }
1128: /* XXX duplicate : */
1129: if (c != NULL) {
1130: debug("confirm %s", ctype);
1131: c->remote_id = rchan;
1132: c->remote_window = rwindow;
1133: c->remote_maxpacket = rmaxpack;
1134:
1135: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1136: packet_put_int(c->remote_id);
1137: packet_put_int(c->self);
1138: packet_put_int(c->local_window);
1139: packet_put_int(c->local_maxpacket);
1140: packet_send();
1141: } else {
1142: debug("failure %s", ctype);
1143: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1144: packet_put_int(rchan);
1145: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1146: packet_put_cstring("bla bla");
1147: packet_put_cstring("");
1148: packet_send();
1149: }
1150: xfree(ctype);
1151: }
1.48 markus 1152: void
1153: client_input_channel_req(int type, int plen, void *ctxt)
1154: {
1155: Channel *c = NULL;
1156: int id, reply, success = 0;
1157: char *rtype;
1158:
1159: id = packet_get_int();
1160: rtype = packet_get_string(NULL);
1161: reply = packet_get_char();
1162:
1163: debug("client_input_channel_req: channel %d rtype %s reply %d",
1164: id, rtype, reply);
1165:
1166: if (session_ident == -1) {
1167: error("client_input_channel_req: no channel %d", session_ident);
1168: } else if (id != session_ident) {
1169: error("client_input_channel_req: channel %d: wrong channel: %d",
1170: session_ident, id);
1171: }
1172: c = channel_lookup(id);
1173: if (c == NULL) {
1174: error("client_input_channel_req: channel %d: unknown channel", id);
1175: } else if (strcmp(rtype, "exit-status") == 0) {
1176: success = 1;
1177: exit_status = packet_get_int();
1178: packet_done();
1179: }
1180: if (reply) {
1181: packet_start(success ?
1182: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1183: packet_put_int(c->remote_id);
1184: packet_send();
1185: }
1186: xfree(rtype);
1187: }
1.22 markus 1188:
1.20 markus 1189: void
1.49 itojun 1190: client_init_dispatch_20(void)
1.16 markus 1191: {
1.55 markus 1192: dispatch_init(&dispatch_protocol_error);
1.16 markus 1193: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1194: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1195: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1196: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1197: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1198: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1199: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1200: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1201: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1202:
1203: /* rekeying */
1204: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1205: }
1.20 markus 1206: void
1.49 itojun 1207: client_init_dispatch_13(void)
1.15 markus 1208: {
1209: dispatch_init(NULL);
1210: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1211: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1212: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1213: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1214: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1215: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1216: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1217: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1218: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1219:
1220: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1221: &auth_input_open_request : &deny_input_open);
1222: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1223: &x11_input_open : &deny_input_open);
1.15 markus 1224: }
1.20 markus 1225: void
1.49 itojun 1226: client_init_dispatch_15(void)
1.15 markus 1227: {
1228: client_init_dispatch_13();
1229: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1230: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1231: }
1.20 markus 1232: void
1.49 itojun 1233: client_init_dispatch(void)
1.15 markus 1234: {
1.16 markus 1235: if (compat20)
1236: client_init_dispatch_20();
1237: else if (compat13)
1.15 markus 1238: client_init_dispatch_13();
1239: else
1240: client_init_dispatch_15();
1.1 deraadt 1241: }