Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.65
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"
1.65 ! djm 62: RCSID("$OpenBSD: clientloop.c,v 1.64 2001/04/17 09:52:48 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"
1.63 markus 83: #include "misc.h"
1.39 markus 84:
85: /* import options */
86: extern Options options;
87:
1.1 deraadt 88: /* Flag indicating that stdin should be redirected from /dev/null. */
89: extern int stdin_null_flag;
90:
1.13 markus 91: /*
92: * Name of the host we are connecting to. This is the name given on the
93: * command line, or the HostName specified for the user-supplied name in a
94: * configuration file.
95: */
1.1 deraadt 96: extern char *host;
97:
1.13 markus 98: /*
99: * Flag to indicate that we have received a window change signal which has
100: * not yet been processed. This will cause a message indicating the new
101: * window size to be sent to the server a little later. This is volatile
102: * because this is updated in a signal handler.
103: */
1.1 deraadt 104: static volatile int received_window_change_signal = 0;
105:
106: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
107: static int in_non_blocking_mode = 0;
108:
109: /* Common data for the client loop code. */
1.31 markus 110: static int quit_pending; /* Set to non-zero to quit the client loop. */
111: static int escape_char; /* Escape character. */
1.11 markus 112: static int escape_pending; /* Last character was the escape character */
113: static int last_was_cr; /* Last character was a newline. */
114: static int exit_status; /* Used to store the exit status of the command. */
115: static int stdin_eof; /* EOF has been encountered on standard error. */
116: static Buffer stdin_buffer; /* Buffer for stdin data. */
117: static Buffer stdout_buffer; /* Buffer for stdout data. */
118: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 119: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
120: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 121: static int connection_in; /* Connection to server (input). */
122: static int connection_out; /* Connection to server (output). */
1.56 markus 123: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 124: static int session_closed = 0; /* In SSH2: login session closed. */
1.1 deraadt 125:
1.16 markus 126: void client_init_dispatch(void);
127: int session_ident = -1;
128:
1.54 markus 129: /*XXX*/
130: extern Kex *xxx_kex;
131:
1.1 deraadt 132: /* Restores stdin to blocking mode. */
133:
1.20 markus 134: void
1.49 itojun 135: leave_non_blocking(void)
1.1 deraadt 136: {
1.11 markus 137: if (in_non_blocking_mode) {
138: (void) fcntl(fileno(stdin), F_SETFL, 0);
139: in_non_blocking_mode = 0;
140: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
141: }
1.1 deraadt 142: }
143:
1.11 markus 144: /* Puts stdin terminal in non-blocking mode. */
145:
1.20 markus 146: void
1.49 itojun 147: enter_non_blocking(void)
1.1 deraadt 148: {
1.11 markus 149: in_non_blocking_mode = 1;
150: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
151: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 152: }
153:
1.13 markus 154: /*
155: * Signal handler for the window change signal (SIGWINCH). This just sets a
156: * flag indicating that the window has changed.
157: */
1.1 deraadt 158:
1.20 markus 159: void
1.11 markus 160: window_change_handler(int sig)
1.1 deraadt 161: {
1.11 markus 162: received_window_change_signal = 1;
163: signal(SIGWINCH, window_change_handler);
1.1 deraadt 164: }
165:
1.13 markus 166: /*
167: * Signal handler for signals that cause the program to terminate. These
168: * signals must be trapped to restore terminal modes.
169: */
1.1 deraadt 170:
1.20 markus 171: void
1.11 markus 172: signal_handler(int sig)
1.1 deraadt 173: {
1.62 stevesk 174: if (in_raw_mode())
1.11 markus 175: leave_raw_mode();
176: if (in_non_blocking_mode)
177: leave_non_blocking();
178: channel_stop_listening();
179: packet_close();
180: fatal("Killed by signal %d.", sig);
1.1 deraadt 181: }
182:
1.13 markus 183: /*
184: * Returns current time in seconds from Jan 1, 1970 with the maximum
185: * available resolution.
186: */
1.1 deraadt 187:
1.20 markus 188: double
1.49 itojun 189: get_current_time(void)
1.1 deraadt 190: {
1.11 markus 191: struct timeval tv;
192: gettimeofday(&tv, NULL);
193: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 194: }
195:
1.13 markus 196: /*
197: * This is called when the interactive is entered. This checks if there is
198: * an EOF coming on stdin. We must check this explicitly, as select() does
199: * not appear to wake up when redirecting from /dev/null.
200: */
1.1 deraadt 201:
1.20 markus 202: void
1.49 itojun 203: client_check_initial_eof_on_stdin(void)
1.1 deraadt 204: {
1.11 markus 205: int len;
206: char buf[1];
1.1 deraadt 207:
1.13 markus 208: /*
209: * If standard input is to be "redirected from /dev/null", we simply
210: * mark that we have seen an EOF and send an EOF message to the
211: * server. Otherwise, we try to read a single character; it appears
212: * that for some files, such /dev/null, select() never wakes up for
213: * read for this descriptor, which means that we never get EOF. This
214: * way we will get the EOF if stdin comes from /dev/null or similar.
215: */
1.11 markus 216: if (stdin_null_flag) {
217: /* Fake EOF on stdin. */
218: debug("Sending eof.");
219: stdin_eof = 1;
220: packet_start(SSH_CMSG_EOF);
221: packet_send();
222: } else {
223: enter_non_blocking();
224:
225: /* Check for immediate EOF on stdin. */
226: len = read(fileno(stdin), buf, 1);
227: if (len == 0) {
1.13 markus 228: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 229: debug("Sending eof.");
230: stdin_eof = 1;
231: packet_start(SSH_CMSG_EOF);
232: packet_send();
233: } else if (len > 0) {
1.13 markus 234: /*
235: * Got data. We must store the data in the buffer,
236: * and also process it as an escape character if
237: * appropriate.
238: */
1.42 markus 239: if ((u_char) buf[0] == escape_char)
1.11 markus 240: escape_pending = 1;
1.52 markus 241: else
1.11 markus 242: buffer_append(&stdin_buffer, buf, 1);
243: }
244: leave_non_blocking();
245: }
1.1 deraadt 246: }
247:
248:
1.13 markus 249: /*
250: * Make packets from buffered stdin data, and buffer them for sending to the
251: * connection.
252: */
1.1 deraadt 253:
1.20 markus 254: void
1.49 itojun 255: client_make_packets_from_stdin_data(void)
1.1 deraadt 256: {
1.42 markus 257: u_int len;
1.1 deraadt 258:
1.11 markus 259: /* Send buffered stdin data to the server. */
260: while (buffer_len(&stdin_buffer) > 0 &&
261: packet_not_very_much_data_to_write()) {
262: len = buffer_len(&stdin_buffer);
263: /* Keep the packets at reasonable size. */
264: if (len > packet_get_maxsize())
265: len = packet_get_maxsize();
266: packet_start(SSH_CMSG_STDIN_DATA);
267: packet_put_string(buffer_ptr(&stdin_buffer), len);
268: packet_send();
269: buffer_consume(&stdin_buffer, len);
1.52 markus 270: stdin_bytes += len;
1.11 markus 271: /* If we have a pending EOF, send it now. */
272: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
273: packet_start(SSH_CMSG_EOF);
274: packet_send();
275: }
1.1 deraadt 276: }
277: }
278:
1.13 markus 279: /*
280: * Checks if the client window has changed, and sends a packet about it to
281: * the server if so. The actual change is detected elsewhere (by a software
282: * interrupt on Unix); this just checks the flag and sends a message if
283: * appropriate.
284: */
1.1 deraadt 285:
1.20 markus 286: void
1.49 itojun 287: client_check_window_change(void)
1.1 deraadt 288: {
1.16 markus 289: struct winsize ws;
290:
291: if (! received_window_change_signal)
292: return;
293: /** XXX race */
294: received_window_change_signal = 0;
295:
296: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
297: return;
298:
1.37 markus 299: debug2("client_check_window_change: changed");
1.16 markus 300:
301: if (compat20) {
302: channel_request_start(session_ident, "window-change", 0);
303: packet_put_int(ws.ws_col);
304: packet_put_int(ws.ws_row);
305: packet_put_int(ws.ws_xpixel);
306: packet_put_int(ws.ws_ypixel);
307: packet_send();
308: } else {
309: packet_start(SSH_CMSG_WINDOW_SIZE);
310: packet_put_int(ws.ws_row);
311: packet_put_int(ws.ws_col);
312: packet_put_int(ws.ws_xpixel);
313: packet_put_int(ws.ws_ypixel);
314: packet_send();
1.1 deraadt 315: }
316: }
317:
1.13 markus 318: /*
319: * Waits until the client can do something (some data becomes available on
320: * one of the file descriptors).
321: */
1.1 deraadt 322:
1.20 markus 323: void
1.46 markus 324: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.56 markus 325: int *maxfdp, int rekeying)
1.11 markus 326: {
1.46 markus 327: /* Add any selections by the channel mechanism. */
1.56 markus 328: channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
1.11 markus 329:
1.16 markus 330: if (!compat20) {
1.17 markus 331: /* Read from the connection, unless our buffers are full. */
1.16 markus 332: if (buffer_len(&stdout_buffer) < buffer_high &&
333: buffer_len(&stderr_buffer) < buffer_high &&
334: channel_not_very_much_buffered_data())
1.46 markus 335: FD_SET(connection_in, *readsetp);
1.17 markus 336: /*
337: * Read from stdin, unless we have seen EOF or have very much
338: * buffered data to send to the server.
339: */
340: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 341: FD_SET(fileno(stdin), *readsetp);
1.17 markus 342:
343: /* Select stdout/stderr if have data in buffer. */
344: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 345: FD_SET(fileno(stdout), *writesetp);
1.17 markus 346: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 347: FD_SET(fileno(stderr), *writesetp);
1.16 markus 348: } else {
1.46 markus 349: FD_SET(connection_in, *readsetp);
1.16 markus 350: }
1.11 markus 351:
352: /* Select server connection if have data to write to the server. */
353: if (packet_have_data_to_write())
1.46 markus 354: FD_SET(connection_out, *writesetp);
1.11 markus 355:
1.13 markus 356: /*
357: * Wait for something to happen. This will suspend the process until
358: * some selected descriptor can be read, written, or has some other
359: * event pending. Note: if you want to implement SSH_MSG_IGNORE
360: * messages to fool traffic analysis, this might be the place to do
361: * it: just have a random timeout for the select, and send a random
362: * SSH_MSG_IGNORE packet when the timeout expires.
363: */
1.11 markus 364:
1.46 markus 365: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 366: char buf[100];
1.51 markus 367:
368: /*
369: * We have to clear the select masks, because we return.
370: * We have to return, because the mainloop checks for the flags
371: * set by the signal handlers.
372: */
373: memset(*readsetp, 0, *maxfdp);
374: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 375:
1.11 markus 376: if (errno == EINTR)
377: return;
378: /* Note: we might still have data in the buffers. */
379: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
380: buffer_append(&stderr_buffer, buf, strlen(buf));
381: quit_pending = 1;
382: }
383: }
384:
1.20 markus 385: void
1.31 markus 386: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 387: {
1.11 markus 388: struct winsize oldws, newws;
389:
390: /* Flush stdout and stderr buffers. */
1.31 markus 391: if (buffer_len(bout) > 0)
392: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
393: if (buffer_len(berr) > 0)
394: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 395:
396: leave_raw_mode();
397:
1.13 markus 398: /*
399: * Free (and clear) the buffer to reduce the amount of data that gets
400: * written to swap.
401: */
1.31 markus 402: buffer_free(bin);
403: buffer_free(bout);
404: buffer_free(berr);
1.11 markus 405:
406: /* Save old window size. */
407: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
408:
409: /* Send the suspend signal to the program itself. */
410: kill(getpid(), SIGTSTP);
411:
412: /* Check if the window size has changed. */
413: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
414: (oldws.ws_row != newws.ws_row ||
415: oldws.ws_col != newws.ws_col ||
416: oldws.ws_xpixel != newws.ws_xpixel ||
417: oldws.ws_ypixel != newws.ws_ypixel))
418: received_window_change_signal = 1;
419:
420: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 421: buffer_init(bin);
422: buffer_init(bout);
423: buffer_init(berr);
1.11 markus 424:
425: enter_raw_mode();
426: }
427:
1.20 markus 428: void
1.17 markus 429: client_process_net_input(fd_set * readset)
1.11 markus 430: {
1.17 markus 431: int len;
432: char buf[8192];
1.11 markus 433:
1.13 markus 434: /*
435: * Read input from the server, and add any such data to the buffer of
436: * the packet subsystem.
437: */
1.11 markus 438: if (FD_ISSET(connection_in, readset)) {
439: /* Read as much as possible. */
440: len = read(connection_in, buf, sizeof(buf));
441: if (len == 0) {
442: /* Received EOF. The remote host has closed the connection. */
443: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
444: host);
1.1 deraadt 445: buffer_append(&stderr_buffer, buf, strlen(buf));
446: quit_pending = 1;
447: return;
1.11 markus 448: }
1.13 markus 449: /*
450: * There is a kernel bug on Solaris that causes select to
451: * sometimes wake up even though there is no data available.
452: */
1.53 millert 453: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 454: len = 0;
455:
456: if (len < 0) {
457: /* An error has encountered. Perhaps there is a network problem. */
458: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
459: host, strerror(errno));
460: buffer_append(&stderr_buffer, buf, strlen(buf));
461: quit_pending = 1;
462: return;
463: }
464: packet_process_incoming(buf, len);
465: }
1.17 markus 466: }
1.16 markus 467:
1.31 markus 468: /* process the characters one by one */
469: int
470: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
471: {
1.32 markus 472: char string[1024];
1.31 markus 473: pid_t pid;
474: int bytes = 0;
1.42 markus 475: u_int i;
476: u_char ch;
1.31 markus 477: char *s;
478:
479: for (i = 0; i < len; i++) {
480: /* Get one character at a time. */
481: ch = buf[i];
482:
483: if (escape_pending) {
484: /* We have previously seen an escape character. */
485: /* Clear the flag now. */
486: escape_pending = 0;
487:
488: /* Process the escaped character. */
489: switch (ch) {
490: case '.':
491: /* Terminate the connection. */
1.32 markus 492: snprintf(string, sizeof string, "%c.\r\n", escape_char);
493: buffer_append(berr, string, strlen(string));
1.31 markus 494:
495: quit_pending = 1;
496: return -1;
497:
498: case 'Z' - 64:
499: /* Suspend the program. */
500: /* Print a message to that effect to the user. */
1.32 markus 501: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
502: buffer_append(berr, string, strlen(string));
1.31 markus 503:
504: /* Restore terminal modes and suspend. */
505: client_suspend_self(bin, bout, berr);
506:
507: /* We have been continued. */
508: continue;
509:
1.54 markus 510: case 'R':
1.59 markus 511: if (compat20) {
512: if (datafellows & SSH_BUG_NOREKEY)
513: log("Server does not support re-keying");
514: else
515: need_rekeying = 1;
516: }
1.54 markus 517: continue;
518:
1.31 markus 519: case '&':
520: /* XXX does not work yet with proto 2 */
521: if (compat20)
522: continue;
523: /*
524: * Detach the program (continue to serve connections,
525: * but put in background and no more new connections).
526: */
527: if (!stdin_eof) {
528: /*
529: * Sending SSH_CMSG_EOF alone does not always appear
530: * to be enough. So we try to send an EOF character
531: * first.
532: */
533: packet_start(SSH_CMSG_STDIN_DATA);
534: packet_put_string("\004", 1);
535: packet_send();
536: /* Close stdin. */
537: stdin_eof = 1;
538: if (buffer_len(bin) == 0) {
539: packet_start(SSH_CMSG_EOF);
540: packet_send();
541: }
542: }
543: /* Restore tty modes. */
544: leave_raw_mode();
545:
546: /* Stop listening for new connections. */
547: channel_stop_listening();
548:
549: printf("%c& [backgrounded]\n", escape_char);
550:
551: /* Fork into background. */
552: pid = fork();
553: if (pid < 0) {
554: error("fork: %.100s", strerror(errno));
555: continue;
556: }
557: if (pid != 0) { /* This is the parent. */
558: /* The parent just exits. */
559: exit(0);
560: }
561: /* The child continues serving connections. */
562: continue; /*XXX ? */
563:
564: case '?':
1.32 markus 565: snprintf(string, sizeof string,
1.31 markus 566: "%c?\r\n\
567: Supported escape sequences:\r\n\
568: ~. - terminate connection\r\n\
1.65 ! djm 569: ~R - Request rekey (SSH protocol 2 only)\r\n\
1.31 markus 570: ~^Z - suspend ssh\r\n\
571: ~# - list forwarded connections\r\n\
572: ~& - background ssh (when waiting for connections to terminate)\r\n\
573: ~? - this message\r\n\
574: ~~ - send the escape character by typing it twice\r\n\
575: (Note that escapes are only recognized immediately after newline.)\r\n",
576: escape_char);
1.32 markus 577: buffer_append(berr, string, strlen(string));
1.31 markus 578: continue;
579:
580: case '#':
1.32 markus 581: snprintf(string, sizeof string, "%c#\r\n", escape_char);
582: buffer_append(berr, string, strlen(string));
1.31 markus 583: s = channel_open_message();
584: buffer_append(berr, s, strlen(s));
585: xfree(s);
586: continue;
587:
588: default:
589: if (ch != escape_char) {
590: buffer_put_char(bin, escape_char);
591: bytes++;
592: }
593: /* Escaped characters fall through here */
594: break;
595: }
596: } else {
597: /*
598: * The previous character was not an escape char. Check if this
599: * is an escape.
600: */
601: if (last_was_cr && ch == escape_char) {
602: /* It is. Set the flag and continue to next character. */
603: escape_pending = 1;
604: continue;
605: }
606: }
607:
608: /*
609: * Normal character. Record whether it was a newline,
610: * and append it to the buffer.
611: */
612: last_was_cr = (ch == '\r' || ch == '\n');
613: buffer_put_char(bin, ch);
614: bytes++;
615: }
616: return bytes;
617: }
618:
1.20 markus 619: void
1.17 markus 620: client_process_input(fd_set * readset)
621: {
1.21 deraadt 622: int len;
1.31 markus 623: char buf[8192];
1.16 markus 624:
1.11 markus 625: /* Read input from stdin. */
626: if (FD_ISSET(fileno(stdin), readset)) {
627: /* Read as much as possible. */
628: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 629: if (len < 0 && (errno == EAGAIN || errno == EINTR))
630: return; /* we'll try again later */
1.11 markus 631: if (len <= 0) {
1.13 markus 632: /*
633: * Received EOF or error. They are treated
634: * similarly, except that an error message is printed
635: * if it was an error condition.
636: */
1.11 markus 637: if (len < 0) {
638: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
639: buffer_append(&stderr_buffer, buf, strlen(buf));
640: }
641: /* Mark that we have seen EOF. */
642: stdin_eof = 1;
1.13 markus 643: /*
644: * Send an EOF message to the server unless there is
645: * data in the buffer. If there is data in the
646: * buffer, no message will be sent now. Code
647: * elsewhere will send the EOF when the buffer
648: * becomes empty if stdin_eof is set.
649: */
1.11 markus 650: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 651: packet_start(SSH_CMSG_EOF);
652: packet_send();
1.11 markus 653: }
654: } else if (escape_char == -1) {
1.13 markus 655: /*
656: * Normal successful read, and no escape character.
657: * Just append the data to buffer.
658: */
1.11 markus 659: buffer_append(&stdin_buffer, buf, len);
660: } else {
1.13 markus 661: /*
662: * Normal, successful read. But we have an escape character
663: * and have to process the characters one by one.
664: */
1.52 markus 665: if (process_escapes(&stdin_buffer, &stdout_buffer,
666: &stderr_buffer, buf, len) == -1)
1.31 markus 667: return;
1.11 markus 668: }
669: }
670: }
671:
1.20 markus 672: void
1.11 markus 673: client_process_output(fd_set * writeset)
674: {
675: int len;
676: char buf[100];
1.1 deraadt 677:
1.11 markus 678: /* Write buffered output to stdout. */
679: if (FD_ISSET(fileno(stdout), writeset)) {
680: /* Write as much data as possible. */
681: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 682: buffer_len(&stdout_buffer));
1.11 markus 683: if (len <= 0) {
1.64 markus 684: if (errno == EINTR || errno == EAGAIN)
1.11 markus 685: len = 0;
686: else {
1.13 markus 687: /*
688: * An error or EOF was encountered. Put an
689: * error message to stderr buffer.
690: */
1.11 markus 691: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
692: buffer_append(&stderr_buffer, buf, strlen(buf));
693: quit_pending = 1;
694: return;
695: }
696: }
697: /* Consume printed data from the buffer. */
698: buffer_consume(&stdout_buffer, len);
1.57 markus 699: stdout_bytes += len;
1.11 markus 700: }
701: /* Write buffered output to stderr. */
702: if (FD_ISSET(fileno(stderr), writeset)) {
703: /* Write as much data as possible. */
704: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 705: buffer_len(&stderr_buffer));
1.11 markus 706: if (len <= 0) {
1.64 markus 707: if (errno == EINTR || errno == EAGAIN)
1.11 markus 708: len = 0;
709: else {
1.13 markus 710: /* EOF or error, but can't even print error message. */
1.11 markus 711: quit_pending = 1;
712: return;
713: }
714: }
715: /* Consume printed characters from the buffer. */
716: buffer_consume(&stderr_buffer, len);
1.57 markus 717: stderr_bytes += len;
1.11 markus 718: }
1.1 deraadt 719: }
720:
1.13 markus 721: /*
1.15 markus 722: * Get packets from the connection input buffer, and process them as long as
723: * there are packets available.
724: *
725: * Any unknown packets received during the actual
726: * session cause the session to terminate. This is
727: * intended to make debugging easier since no
728: * confirmations are sent. Any compatible protocol
729: * extensions must be negotiated during the
730: * preparatory phase.
731: */
732:
1.20 markus 733: void
1.49 itojun 734: client_process_buffered_input_packets(void)
1.15 markus 735: {
1.54 markus 736: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 737: }
738:
1.31 markus 739: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 740:
741: int
1.31 markus 742: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 743: {
1.31 markus 744: /* XXX we assume c->extended is writeable */
745: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 746: }
747:
1.60 markus 748: void
749: client_channel_closed(int id, void *arg)
750: {
751: if (id != session_ident)
752: error("client_channel_closed: id %d != session_ident %d",
753: id, session_ident);
754: session_closed = 1;
1.62 stevesk 755: if (in_raw_mode())
1.61 markus 756: leave_raw_mode();
1.60 markus 757: }
758:
1.15 markus 759: /*
1.13 markus 760: * Implements the interactive session with the server. This is called after
761: * the user has been authenticated, and a command has been started on the
762: * remote host. If escape_char != -1, it is the character used as an escape
763: * character for terminating or suspending the session.
764: */
1.1 deraadt 765:
1.20 markus 766: int
1.30 markus 767: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 768: {
1.46 markus 769: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 770: double start_time, total_time;
1.56 markus 771: int max_fd = 0, len, rekeying = 0;
1.11 markus 772: char buf[100];
773:
774: debug("Entering interactive session.");
775:
776: start_time = get_current_time();
777:
778: /* Initialize variables. */
779: escape_pending = 0;
780: last_was_cr = 1;
781: exit_status = -1;
782: stdin_eof = 0;
783: buffer_high = 64 * 1024;
784: connection_in = packet_get_connection_in();
785: connection_out = packet_get_connection_out();
1.46 markus 786: max_fd = MAX(connection_in, connection_out);
787:
788: if (!compat20) {
1.63 markus 789: /* enable nonblocking unless tty */
790: if (!isatty(fileno(stdin)))
791: set_nonblock(fileno(stdin));
792: if (!isatty(fileno(stdout)))
793: set_nonblock(fileno(stdout));
794: if (!isatty(fileno(stderr)))
795: set_nonblock(fileno(stderr));
1.46 markus 796: max_fd = MAX(max_fd, fileno(stdin));
797: max_fd = MAX(max_fd, fileno(stdout));
798: max_fd = MAX(max_fd, fileno(stderr));
799: }
1.11 markus 800: stdin_bytes = 0;
801: stdout_bytes = 0;
802: stderr_bytes = 0;
803: quit_pending = 0;
804: escape_char = escape_char_arg;
805:
806: /* Initialize buffers. */
807: buffer_init(&stdin_buffer);
808: buffer_init(&stdout_buffer);
809: buffer_init(&stderr_buffer);
810:
1.15 markus 811: client_init_dispatch();
812:
1.11 markus 813: /* Set signal handlers to restore non-blocking mode. */
814: signal(SIGINT, signal_handler);
815: signal(SIGQUIT, signal_handler);
816: signal(SIGTERM, signal_handler);
817: signal(SIGPIPE, SIG_IGN);
818: if (have_pty)
819: signal(SIGWINCH, window_change_handler);
820:
821: if (have_pty)
822: enter_raw_mode();
823:
1.48 markus 824: if (compat20) {
825: session_ident = ssh2_chan_id;
826: if (escape_char != -1)
827: channel_register_filter(session_ident,
828: simple_escape_filter);
1.60 markus 829: if (session_ident != -1)
830: channel_register_cleanup(session_ident,
831: client_channel_closed);
1.48 markus 832: } else {
833: /* Check if we should immediately send eof on stdin. */
1.16 markus 834: client_check_initial_eof_on_stdin();
1.48 markus 835: }
1.30 markus 836:
1.11 markus 837: /* Main loop of the client for the interactive session mode. */
838: while (!quit_pending) {
839:
1.13 markus 840: /* Process buffered packets sent by the server. */
1.11 markus 841: client_process_buffered_input_packets();
842:
1.60 markus 843: if (compat20 && session_closed && !channel_still_open())
844: break;
845:
1.56 markus 846: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 847:
1.56 markus 848: if (rekeying) {
849: debug("rekeying in progress");
850: } else {
851: /*
852: * Make packets of buffered stdin data, and buffer
853: * them for sending to the server.
854: */
855: if (!compat20)
856: client_make_packets_from_stdin_data();
1.11 markus 857:
1.56 markus 858: /*
859: * Make packets from buffered channel data, and
860: * enqueue them for sending to the server.
861: */
862: if (packet_not_very_much_data_to_write())
863: channel_output_poll();
1.11 markus 864:
1.56 markus 865: /*
866: * Check if the window size has changed, and buffer a
867: * message about it to the server if so.
868: */
869: client_check_window_change();
1.11 markus 870:
1.56 markus 871: if (quit_pending)
872: break;
873: }
1.13 markus 874: /*
875: * Wait until we have something to do (something becomes
876: * available on one of the descriptors).
877: */
1.56 markus 878: client_wait_until_can_do_something(&readset, &writeset,
879: &max_fd, rekeying);
1.11 markus 880:
881: if (quit_pending)
882: break;
883:
1.56 markus 884: /* Do channel operations unless rekeying in progress. */
885: if (!rekeying) {
886: channel_after_select(readset, writeset);
887:
888: if (need_rekeying) {
889: debug("user requests rekeying");
890: xxx_kex->done = 0;
891: kex_send_kexinit(xxx_kex);
892: need_rekeying = 0;
893: }
894: }
1.11 markus 895:
1.17 markus 896: /* Buffer input from the connection. */
1.46 markus 897: client_process_net_input(readset);
1.17 markus 898:
899: if (quit_pending)
900: break;
1.11 markus 901:
1.17 markus 902: if (!compat20) {
903: /* Buffer data from stdin */
1.46 markus 904: client_process_input(readset);
1.17 markus 905: /*
906: * Process output to stdout and stderr. Output to
907: * the connection is processed elsewhere (above).
908: */
1.46 markus 909: client_process_output(writeset);
1.17 markus 910: }
1.11 markus 911:
1.13 markus 912: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 913: if (FD_ISSET(connection_out, writeset))
1.11 markus 914: packet_write_poll();
915: }
1.46 markus 916: if (readset)
917: xfree(readset);
918: if (writeset)
919: xfree(writeset);
1.11 markus 920:
921: /* Terminate the session. */
922:
923: /* Stop watching for window change. */
924: if (have_pty)
925: signal(SIGWINCH, SIG_DFL);
926:
927: /* Stop listening for connections. */
928: channel_stop_listening();
929:
1.13 markus 930: /*
931: * In interactive mode (with pseudo tty) display a message indicating
932: * that the connection has been closed.
933: */
1.11 markus 934: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
935: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
936: buffer_append(&stderr_buffer, buf, strlen(buf));
937: }
938: /* Output any buffered data for stdout. */
939: while (buffer_len(&stdout_buffer) > 0) {
940: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 941: buffer_len(&stdout_buffer));
1.11 markus 942: if (len <= 0) {
943: error("Write failed flushing stdout buffer.");
944: break;
945: }
946: buffer_consume(&stdout_buffer, len);
1.57 markus 947: stdout_bytes += len;
1.11 markus 948: }
949:
950: /* Output any buffered data for stderr. */
951: while (buffer_len(&stderr_buffer) > 0) {
952: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 953: buffer_len(&stderr_buffer));
1.11 markus 954: if (len <= 0) {
955: error("Write failed flushing stderr buffer.");
956: break;
957: }
958: buffer_consume(&stderr_buffer, len);
1.57 markus 959: stderr_bytes += len;
1.11 markus 960: }
961:
962: if (have_pty)
963: leave_raw_mode();
964:
965: /* Clear and free any buffers. */
966: memset(buf, 0, sizeof(buf));
967: buffer_free(&stdin_buffer);
968: buffer_free(&stdout_buffer);
969: buffer_free(&stderr_buffer);
970:
971: /* Report bytes transferred, and transfer rates. */
972: total_time = get_current_time() - start_time;
973: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
974: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
975: if (total_time > 0)
976: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
977: stdin_bytes / total_time, stdout_bytes / total_time,
978: stderr_bytes / total_time);
979:
980: /* Return the exit status of the program. */
981: debug("Exit status %d", exit_status);
982: return exit_status;
1.15 markus 983: }
984:
985: /*********/
986:
987: void
1.36 markus 988: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 989: {
1.42 markus 990: u_int data_len;
1.15 markus 991: char *data = packet_get_string(&data_len);
992: packet_integrity_check(plen, 4 + data_len, type);
993: buffer_append(&stdout_buffer, data, data_len);
994: memset(data, 0, data_len);
995: xfree(data);
996: }
997: void
1.36 markus 998: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 999: {
1.42 markus 1000: u_int data_len;
1.15 markus 1001: char *data = packet_get_string(&data_len);
1002: packet_integrity_check(plen, 4 + data_len, type);
1003: buffer_append(&stderr_buffer, data, data_len);
1004: memset(data, 0, data_len);
1005: xfree(data);
1006: }
1007: void
1.36 markus 1008: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1009: {
1010: packet_integrity_check(plen, 4, type);
1011: exit_status = packet_get_int();
1012: /* Acknowledge the exit. */
1013: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1014: packet_send();
1015: /*
1016: * Must wait for packet to be sent since we are
1017: * exiting the loop.
1018: */
1019: packet_write_wait();
1020: /* Flag that we want to exit. */
1021: quit_pending = 1;
1022: }
1023:
1.40 markus 1024: Channel *
1025: client_request_forwarded_tcpip(const char *request_type, int rchan)
1026: {
1027: Channel* c = NULL;
1028: char *listen_address, *originator_address;
1029: int listen_port, originator_port;
1030: int sock, newch;
1031:
1032: /* Get rest of the packet */
1033: listen_address = packet_get_string(NULL);
1034: listen_port = packet_get_int();
1035: originator_address = packet_get_string(NULL);
1036: originator_port = packet_get_int();
1037: packet_done();
1038:
1039: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1040: listen_address, listen_port, originator_address, originator_port);
1041:
1042: sock = channel_connect_by_listen_adress(listen_port);
1043: if (sock >= 0) {
1044: newch = channel_new("forwarded-tcpip",
1.41 markus 1045: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1046: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1047: xstrdup(originator_address), 1);
1048: c = channel_lookup(newch);
1049: }
1050: xfree(originator_address);
1051: xfree(listen_address);
1052: return c;
1053: }
1054:
1055: Channel*
1056: client_request_x11(const char *request_type, int rchan)
1057: {
1058: Channel *c = NULL;
1059: char *originator;
1060: int originator_port;
1061: int sock, newch;
1062:
1063: if (!options.forward_x11) {
1064: error("Warning: ssh server tried X11 forwarding.");
1065: error("Warning: this is probably a break in attempt by a malicious server.");
1066: return NULL;
1067: }
1068: originator = packet_get_string(NULL);
1069: if (datafellows & SSH_BUG_X11FWD) {
1070: debug2("buggy server: x11 request w/o originator_port");
1071: originator_port = 0;
1072: } else {
1073: originator_port = packet_get_int();
1074: }
1075: packet_done();
1076: /* XXX check permission */
1.47 markus 1077: debug("client_request_x11: request from %s %d", originator,
1078: originator_port);
1.40 markus 1079: sock = x11_connect_display();
1080: if (sock >= 0) {
1081: newch = channel_new("x11",
1082: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1083: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1084: xstrdup("x11"), 1);
1085: c = channel_lookup(newch);
1086: }
1087: xfree(originator);
1088: return c;
1089: }
1090:
1091: Channel*
1092: client_request_agent(const char *request_type, int rchan)
1093: {
1094: Channel *c = NULL;
1095: int sock, newch;
1096:
1097: if (!options.forward_agent) {
1098: error("Warning: ssh server tried agent forwarding.");
1099: error("Warning: this is probably a break in attempt by a malicious server.");
1100: return NULL;
1101: }
1102: sock = ssh_get_authentication_socket();
1103: if (sock >= 0) {
1104: newch = channel_new("authentication agent connection",
1105: SSH_CHANNEL_OPEN, sock, sock, -1,
1106: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1107: xstrdup("authentication agent connection"), 1);
1108: c = channel_lookup(newch);
1109: }
1110: return c;
1111: }
1112:
1.22 markus 1113: /* XXXX move to generic input handler */
1114: void
1.36 markus 1115: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1116: {
1117: Channel *c = NULL;
1118: char *ctype;
1.42 markus 1119: u_int len;
1.22 markus 1120: int rchan;
1121: int rmaxpack;
1122: int rwindow;
1123:
1124: ctype = packet_get_string(&len);
1125: rchan = packet_get_int();
1126: rwindow = packet_get_int();
1127: rmaxpack = packet_get_int();
1128:
1.24 markus 1129: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1130: ctype, rchan, rwindow, rmaxpack);
1131:
1.40 markus 1132: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1133: c = client_request_forwarded_tcpip(ctype, rchan);
1134: } else if (strcmp(ctype, "x11") == 0) {
1135: c = client_request_x11(ctype, rchan);
1136: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1137: c = client_request_agent(ctype, rchan);
1.22 markus 1138: }
1139: /* XXX duplicate : */
1140: if (c != NULL) {
1141: debug("confirm %s", ctype);
1142: c->remote_id = rchan;
1143: c->remote_window = rwindow;
1144: c->remote_maxpacket = rmaxpack;
1145:
1146: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1147: packet_put_int(c->remote_id);
1148: packet_put_int(c->self);
1149: packet_put_int(c->local_window);
1150: packet_put_int(c->local_maxpacket);
1151: packet_send();
1152: } else {
1153: debug("failure %s", ctype);
1154: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1155: packet_put_int(rchan);
1156: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1157: packet_put_cstring("bla bla");
1158: packet_put_cstring("");
1159: packet_send();
1160: }
1161: xfree(ctype);
1162: }
1.48 markus 1163: void
1164: client_input_channel_req(int type, int plen, void *ctxt)
1165: {
1166: Channel *c = NULL;
1167: int id, reply, success = 0;
1168: char *rtype;
1169:
1170: id = packet_get_int();
1171: rtype = packet_get_string(NULL);
1172: reply = packet_get_char();
1173:
1174: debug("client_input_channel_req: channel %d rtype %s reply %d",
1175: id, rtype, reply);
1176:
1177: if (session_ident == -1) {
1178: error("client_input_channel_req: no channel %d", session_ident);
1179: } else if (id != session_ident) {
1180: error("client_input_channel_req: channel %d: wrong channel: %d",
1181: session_ident, id);
1182: }
1183: c = channel_lookup(id);
1184: if (c == NULL) {
1185: error("client_input_channel_req: channel %d: unknown channel", id);
1186: } else if (strcmp(rtype, "exit-status") == 0) {
1187: success = 1;
1188: exit_status = packet_get_int();
1189: packet_done();
1190: }
1191: if (reply) {
1192: packet_start(success ?
1193: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1194: packet_put_int(c->remote_id);
1195: packet_send();
1196: }
1197: xfree(rtype);
1198: }
1.22 markus 1199:
1.20 markus 1200: void
1.49 itojun 1201: client_init_dispatch_20(void)
1.16 markus 1202: {
1.55 markus 1203: dispatch_init(&dispatch_protocol_error);
1.16 markus 1204: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1205: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1206: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1207: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1208: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1209: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1210: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1211: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1212: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1213:
1214: /* rekeying */
1215: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1216: }
1.20 markus 1217: void
1.49 itojun 1218: client_init_dispatch_13(void)
1.15 markus 1219: {
1220: dispatch_init(NULL);
1221: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1222: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1223: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1224: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1225: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1226: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1227: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1228: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1229: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1230:
1231: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1232: &auth_input_open_request : &deny_input_open);
1233: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1234: &x11_input_open : &deny_input_open);
1.15 markus 1235: }
1.20 markus 1236: void
1.49 itojun 1237: client_init_dispatch_15(void)
1.15 markus 1238: {
1239: client_init_dispatch_13();
1240: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1241: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1242: }
1.20 markus 1243: void
1.49 itojun 1244: client_init_dispatch(void)
1.15 markus 1245: {
1.16 markus 1246: if (compat20)
1247: client_init_dispatch_20();
1248: else if (compat13)
1.15 markus 1249: client_init_dispatch_13();
1250: else
1251: client_init_dispatch_15();
1.1 deraadt 1252: }