Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.73
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"
1.73 ! markus 62: RCSID("$OpenBSD: clientloop.c,v 1.72 2001/05/24 18:57:53 stevesk 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"
1.73 ! markus 71: #include "channel.h"
1.15 markus 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 {
1.71 markus 349: /* channel_prepare_select could have closed the last channel */
350: if (session_closed && !channel_still_open()) {
351: if (!packet_have_data_to_write())
352: return;
353: } else {
354: FD_SET(connection_in, *readsetp);
355: }
1.16 markus 356: }
1.11 markus 357:
358: /* Select server connection if have data to write to the server. */
359: if (packet_have_data_to_write())
1.46 markus 360: FD_SET(connection_out, *writesetp);
1.11 markus 361:
1.13 markus 362: /*
363: * Wait for something to happen. This will suspend the process until
364: * some selected descriptor can be read, written, or has some other
365: * event pending. Note: if you want to implement SSH_MSG_IGNORE
366: * messages to fool traffic analysis, this might be the place to do
367: * it: just have a random timeout for the select, and send a random
368: * SSH_MSG_IGNORE packet when the timeout expires.
369: */
1.11 markus 370:
1.46 markus 371: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 372: char buf[100];
1.51 markus 373:
374: /*
375: * We have to clear the select masks, because we return.
376: * We have to return, because the mainloop checks for the flags
377: * set by the signal handlers.
378: */
379: memset(*readsetp, 0, *maxfdp);
380: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 381:
1.11 markus 382: if (errno == EINTR)
383: return;
384: /* Note: we might still have data in the buffers. */
385: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
386: buffer_append(&stderr_buffer, buf, strlen(buf));
387: quit_pending = 1;
388: }
389: }
390:
1.20 markus 391: void
1.31 markus 392: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 393: {
1.11 markus 394: struct winsize oldws, newws;
395:
396: /* Flush stdout and stderr buffers. */
1.31 markus 397: if (buffer_len(bout) > 0)
398: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
399: if (buffer_len(berr) > 0)
400: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 401:
402: leave_raw_mode();
403:
1.13 markus 404: /*
405: * Free (and clear) the buffer to reduce the amount of data that gets
406: * written to swap.
407: */
1.31 markus 408: buffer_free(bin);
409: buffer_free(bout);
410: buffer_free(berr);
1.11 markus 411:
412: /* Save old window size. */
413: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
414:
415: /* Send the suspend signal to the program itself. */
416: kill(getpid(), SIGTSTP);
417:
418: /* Check if the window size has changed. */
419: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
420: (oldws.ws_row != newws.ws_row ||
421: oldws.ws_col != newws.ws_col ||
422: oldws.ws_xpixel != newws.ws_xpixel ||
423: oldws.ws_ypixel != newws.ws_ypixel))
424: received_window_change_signal = 1;
425:
426: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 427: buffer_init(bin);
428: buffer_init(bout);
429: buffer_init(berr);
1.11 markus 430:
431: enter_raw_mode();
432: }
433:
1.20 markus 434: void
1.17 markus 435: client_process_net_input(fd_set * readset)
1.11 markus 436: {
1.17 markus 437: int len;
438: char buf[8192];
1.11 markus 439:
1.13 markus 440: /*
441: * Read input from the server, and add any such data to the buffer of
442: * the packet subsystem.
443: */
1.11 markus 444: if (FD_ISSET(connection_in, readset)) {
445: /* Read as much as possible. */
446: len = read(connection_in, buf, sizeof(buf));
447: if (len == 0) {
448: /* Received EOF. The remote host has closed the connection. */
449: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
450: host);
1.1 deraadt 451: buffer_append(&stderr_buffer, buf, strlen(buf));
452: quit_pending = 1;
453: return;
1.11 markus 454: }
1.13 markus 455: /*
456: * There is a kernel bug on Solaris that causes select to
457: * sometimes wake up even though there is no data available.
458: */
1.53 millert 459: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 460: len = 0;
461:
462: if (len < 0) {
463: /* An error has encountered. Perhaps there is a network problem. */
464: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
465: host, strerror(errno));
466: buffer_append(&stderr_buffer, buf, strlen(buf));
467: quit_pending = 1;
468: return;
469: }
470: packet_process_incoming(buf, len);
471: }
1.17 markus 472: }
1.16 markus 473:
1.31 markus 474: /* process the characters one by one */
475: int
476: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
477: {
1.32 markus 478: char string[1024];
1.31 markus 479: pid_t pid;
480: int bytes = 0;
1.42 markus 481: u_int i;
482: u_char ch;
1.31 markus 483: char *s;
484:
485: for (i = 0; i < len; i++) {
486: /* Get one character at a time. */
487: ch = buf[i];
488:
489: if (escape_pending) {
490: /* We have previously seen an escape character. */
491: /* Clear the flag now. */
492: escape_pending = 0;
493:
494: /* Process the escaped character. */
495: switch (ch) {
496: case '.':
497: /* Terminate the connection. */
1.32 markus 498: snprintf(string, sizeof string, "%c.\r\n", escape_char);
499: buffer_append(berr, string, strlen(string));
1.31 markus 500:
501: quit_pending = 1;
502: return -1;
503:
504: case 'Z' - 64:
505: /* Suspend the program. */
506: /* Print a message to that effect to the user. */
1.32 markus 507: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
508: buffer_append(berr, string, strlen(string));
1.31 markus 509:
510: /* Restore terminal modes and suspend. */
511: client_suspend_self(bin, bout, berr);
512:
513: /* We have been continued. */
514: continue;
515:
1.54 markus 516: case 'R':
1.59 markus 517: if (compat20) {
518: if (datafellows & SSH_BUG_NOREKEY)
519: log("Server does not support re-keying");
520: else
521: need_rekeying = 1;
522: }
1.54 markus 523: continue;
524:
1.31 markus 525: case '&':
526: /* XXX does not work yet with proto 2 */
527: if (compat20)
528: continue;
529: /*
530: * Detach the program (continue to serve connections,
531: * but put in background and no more new connections).
532: */
533: if (!stdin_eof) {
534: /*
535: * Sending SSH_CMSG_EOF alone does not always appear
536: * to be enough. So we try to send an EOF character
537: * first.
538: */
539: packet_start(SSH_CMSG_STDIN_DATA);
540: packet_put_string("\004", 1);
541: packet_send();
542: /* Close stdin. */
543: stdin_eof = 1;
544: if (buffer_len(bin) == 0) {
545: packet_start(SSH_CMSG_EOF);
546: packet_send();
547: }
548: }
549: /* Restore tty modes. */
550: leave_raw_mode();
551:
552: /* Stop listening for new connections. */
553: channel_stop_listening();
554:
555: printf("%c& [backgrounded]\n", escape_char);
556:
557: /* Fork into background. */
558: pid = fork();
559: if (pid < 0) {
560: error("fork: %.100s", strerror(errno));
561: continue;
562: }
563: if (pid != 0) { /* This is the parent. */
564: /* The parent just exits. */
565: exit(0);
566: }
567: /* The child continues serving connections. */
568: continue; /*XXX ? */
569:
570: case '?':
1.32 markus 571: snprintf(string, sizeof string,
1.31 markus 572: "%c?\r\n\
573: Supported escape sequences:\r\n\
574: ~. - terminate connection\r\n\
1.72 stevesk 575: ~R - Request rekey (SSH protocol 2 only)\r\n\
1.31 markus 576: ~^Z - suspend ssh\r\n\
577: ~# - list forwarded connections\r\n\
578: ~& - background ssh (when waiting for connections to terminate)\r\n\
579: ~? - this message\r\n\
580: ~~ - send the escape character by typing it twice\r\n\
581: (Note that escapes are only recognized immediately after newline.)\r\n",
582: escape_char);
1.32 markus 583: buffer_append(berr, string, strlen(string));
1.31 markus 584: continue;
585:
586: case '#':
1.32 markus 587: snprintf(string, sizeof string, "%c#\r\n", escape_char);
588: buffer_append(berr, string, strlen(string));
1.31 markus 589: s = channel_open_message();
590: buffer_append(berr, s, strlen(s));
591: xfree(s);
592: continue;
593:
594: default:
595: if (ch != escape_char) {
596: buffer_put_char(bin, escape_char);
597: bytes++;
598: }
599: /* Escaped characters fall through here */
600: break;
601: }
602: } else {
603: /*
604: * The previous character was not an escape char. Check if this
605: * is an escape.
606: */
607: if (last_was_cr && ch == escape_char) {
608: /* It is. Set the flag and continue to next character. */
609: escape_pending = 1;
610: continue;
611: }
612: }
613:
614: /*
615: * Normal character. Record whether it was a newline,
616: * and append it to the buffer.
617: */
618: last_was_cr = (ch == '\r' || ch == '\n');
619: buffer_put_char(bin, ch);
620: bytes++;
621: }
622: return bytes;
623: }
624:
1.20 markus 625: void
1.17 markus 626: client_process_input(fd_set * readset)
627: {
1.21 deraadt 628: int len;
1.31 markus 629: char buf[8192];
1.16 markus 630:
1.11 markus 631: /* Read input from stdin. */
632: if (FD_ISSET(fileno(stdin), readset)) {
633: /* Read as much as possible. */
634: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 635: if (len < 0 && (errno == EAGAIN || errno == EINTR))
636: return; /* we'll try again later */
1.11 markus 637: if (len <= 0) {
1.13 markus 638: /*
639: * Received EOF or error. They are treated
640: * similarly, except that an error message is printed
641: * if it was an error condition.
642: */
1.11 markus 643: if (len < 0) {
644: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
645: buffer_append(&stderr_buffer, buf, strlen(buf));
646: }
647: /* Mark that we have seen EOF. */
648: stdin_eof = 1;
1.13 markus 649: /*
650: * Send an EOF message to the server unless there is
651: * data in the buffer. If there is data in the
652: * buffer, no message will be sent now. Code
653: * elsewhere will send the EOF when the buffer
654: * becomes empty if stdin_eof is set.
655: */
1.11 markus 656: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 657: packet_start(SSH_CMSG_EOF);
658: packet_send();
1.11 markus 659: }
1.72 stevesk 660: } else if (escape_char == SSH_ESCAPECHAR_NONE) {
1.13 markus 661: /*
662: * Normal successful read, and no escape character.
663: * Just append the data to buffer.
664: */
1.11 markus 665: buffer_append(&stdin_buffer, buf, len);
666: } else {
1.13 markus 667: /*
668: * Normal, successful read. But we have an escape character
669: * and have to process the characters one by one.
670: */
1.52 markus 671: if (process_escapes(&stdin_buffer, &stdout_buffer,
672: &stderr_buffer, buf, len) == -1)
1.31 markus 673: return;
1.11 markus 674: }
675: }
676: }
677:
1.20 markus 678: void
1.11 markus 679: client_process_output(fd_set * writeset)
680: {
681: int len;
682: char buf[100];
1.1 deraadt 683:
1.11 markus 684: /* Write buffered output to stdout. */
685: if (FD_ISSET(fileno(stdout), writeset)) {
686: /* Write as much data as possible. */
687: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 688: buffer_len(&stdout_buffer));
1.11 markus 689: if (len <= 0) {
1.64 markus 690: if (errno == EINTR || errno == EAGAIN)
1.11 markus 691: len = 0;
692: else {
1.13 markus 693: /*
694: * An error or EOF was encountered. Put an
695: * error message to stderr buffer.
696: */
1.11 markus 697: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
698: buffer_append(&stderr_buffer, buf, strlen(buf));
699: quit_pending = 1;
700: return;
701: }
702: }
703: /* Consume printed data from the buffer. */
704: buffer_consume(&stdout_buffer, len);
1.57 markus 705: stdout_bytes += len;
1.11 markus 706: }
707: /* Write buffered output to stderr. */
708: if (FD_ISSET(fileno(stderr), writeset)) {
709: /* Write as much data as possible. */
710: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 711: buffer_len(&stderr_buffer));
1.11 markus 712: if (len <= 0) {
1.64 markus 713: if (errno == EINTR || errno == EAGAIN)
1.11 markus 714: len = 0;
715: else {
1.13 markus 716: /* EOF or error, but can't even print error message. */
1.11 markus 717: quit_pending = 1;
718: return;
719: }
720: }
721: /* Consume printed characters from the buffer. */
722: buffer_consume(&stderr_buffer, len);
1.57 markus 723: stderr_bytes += len;
1.11 markus 724: }
1.1 deraadt 725: }
726:
1.13 markus 727: /*
1.15 markus 728: * Get packets from the connection input buffer, and process them as long as
729: * there are packets available.
730: *
731: * Any unknown packets received during the actual
732: * session cause the session to terminate. This is
733: * intended to make debugging easier since no
734: * confirmations are sent. Any compatible protocol
735: * extensions must be negotiated during the
736: * preparatory phase.
737: */
738:
1.20 markus 739: void
1.49 itojun 740: client_process_buffered_input_packets(void)
1.15 markus 741: {
1.54 markus 742: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 743: }
744:
1.31 markus 745: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 746:
747: int
1.31 markus 748: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 749: {
1.31 markus 750: /* XXX we assume c->extended is writeable */
751: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 752: }
753:
1.60 markus 754: void
755: client_channel_closed(int id, void *arg)
756: {
757: if (id != session_ident)
758: error("client_channel_closed: id %d != session_ident %d",
759: id, session_ident);
760: session_closed = 1;
1.62 stevesk 761: if (in_raw_mode())
1.61 markus 762: leave_raw_mode();
1.60 markus 763: }
764:
1.15 markus 765: /*
1.13 markus 766: * Implements the interactive session with the server. This is called after
767: * the user has been authenticated, and a command has been started on the
1.72 stevesk 768: * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
769: * used as an escape character for terminating or suspending the session.
1.13 markus 770: */
1.1 deraadt 771:
1.20 markus 772: int
1.30 markus 773: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 774: {
1.46 markus 775: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 776: double start_time, total_time;
1.56 markus 777: int max_fd = 0, len, rekeying = 0;
1.11 markus 778: char buf[100];
779:
780: debug("Entering interactive session.");
781:
782: start_time = get_current_time();
783:
784: /* Initialize variables. */
785: escape_pending = 0;
786: last_was_cr = 1;
787: exit_status = -1;
788: stdin_eof = 0;
789: buffer_high = 64 * 1024;
790: connection_in = packet_get_connection_in();
791: connection_out = packet_get_connection_out();
1.46 markus 792: max_fd = MAX(connection_in, connection_out);
793:
794: if (!compat20) {
1.63 markus 795: /* enable nonblocking unless tty */
796: if (!isatty(fileno(stdin)))
797: set_nonblock(fileno(stdin));
798: if (!isatty(fileno(stdout)))
799: set_nonblock(fileno(stdout));
800: if (!isatty(fileno(stderr)))
801: set_nonblock(fileno(stderr));
1.46 markus 802: max_fd = MAX(max_fd, fileno(stdin));
803: max_fd = MAX(max_fd, fileno(stdout));
804: max_fd = MAX(max_fd, fileno(stderr));
805: }
1.11 markus 806: stdin_bytes = 0;
807: stdout_bytes = 0;
808: stderr_bytes = 0;
809: quit_pending = 0;
810: escape_char = escape_char_arg;
811:
812: /* Initialize buffers. */
813: buffer_init(&stdin_buffer);
814: buffer_init(&stdout_buffer);
815: buffer_init(&stderr_buffer);
816:
1.15 markus 817: client_init_dispatch();
818:
1.11 markus 819: /* Set signal handlers to restore non-blocking mode. */
820: signal(SIGINT, signal_handler);
821: signal(SIGQUIT, signal_handler);
822: signal(SIGTERM, signal_handler);
823: signal(SIGPIPE, SIG_IGN);
824: if (have_pty)
825: signal(SIGWINCH, window_change_handler);
826:
827: if (have_pty)
828: enter_raw_mode();
829:
1.48 markus 830: if (compat20) {
831: session_ident = ssh2_chan_id;
1.72 stevesk 832: if (escape_char != SSH_ESCAPECHAR_NONE)
1.48 markus 833: channel_register_filter(session_ident,
834: simple_escape_filter);
1.60 markus 835: if (session_ident != -1)
836: channel_register_cleanup(session_ident,
837: client_channel_closed);
1.48 markus 838: } else {
839: /* Check if we should immediately send eof on stdin. */
1.16 markus 840: client_check_initial_eof_on_stdin();
1.48 markus 841: }
1.30 markus 842:
1.11 markus 843: /* Main loop of the client for the interactive session mode. */
844: while (!quit_pending) {
845:
1.13 markus 846: /* Process buffered packets sent by the server. */
1.11 markus 847: client_process_buffered_input_packets();
848:
1.60 markus 849: if (compat20 && session_closed && !channel_still_open())
850: break;
851:
1.56 markus 852: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 853:
1.56 markus 854: if (rekeying) {
855: debug("rekeying in progress");
856: } else {
857: /*
858: * Make packets of buffered stdin data, and buffer
859: * them for sending to the server.
860: */
861: if (!compat20)
862: client_make_packets_from_stdin_data();
1.11 markus 863:
1.56 markus 864: /*
865: * Make packets from buffered channel data, and
866: * enqueue them for sending to the server.
867: */
868: if (packet_not_very_much_data_to_write())
869: channel_output_poll();
1.11 markus 870:
1.56 markus 871: /*
872: * Check if the window size has changed, and buffer a
873: * message about it to the server if so.
874: */
875: client_check_window_change();
1.11 markus 876:
1.56 markus 877: if (quit_pending)
878: break;
879: }
1.13 markus 880: /*
881: * Wait until we have something to do (something becomes
882: * available on one of the descriptors).
883: */
1.56 markus 884: client_wait_until_can_do_something(&readset, &writeset,
885: &max_fd, rekeying);
1.11 markus 886:
887: if (quit_pending)
888: break;
889:
1.56 markus 890: /* Do channel operations unless rekeying in progress. */
891: if (!rekeying) {
892: channel_after_select(readset, writeset);
893:
894: if (need_rekeying) {
895: debug("user requests rekeying");
896: xxx_kex->done = 0;
897: kex_send_kexinit(xxx_kex);
898: need_rekeying = 0;
899: }
900: }
1.11 markus 901:
1.17 markus 902: /* Buffer input from the connection. */
1.46 markus 903: client_process_net_input(readset);
1.17 markus 904:
905: if (quit_pending)
906: break;
1.11 markus 907:
1.17 markus 908: if (!compat20) {
909: /* Buffer data from stdin */
1.46 markus 910: client_process_input(readset);
1.17 markus 911: /*
912: * Process output to stdout and stderr. Output to
913: * the connection is processed elsewhere (above).
914: */
1.46 markus 915: client_process_output(writeset);
1.17 markus 916: }
1.11 markus 917:
1.13 markus 918: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 919: if (FD_ISSET(connection_out, writeset))
1.11 markus 920: packet_write_poll();
921: }
1.46 markus 922: if (readset)
923: xfree(readset);
924: if (writeset)
925: xfree(writeset);
1.11 markus 926:
927: /* Terminate the session. */
928:
929: /* Stop watching for window change. */
930: if (have_pty)
931: signal(SIGWINCH, SIG_DFL);
932:
933: /* Stop listening for connections. */
934: channel_stop_listening();
935:
1.13 markus 936: /*
937: * In interactive mode (with pseudo tty) display a message indicating
938: * that the connection has been closed.
939: */
1.11 markus 940: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
941: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
942: buffer_append(&stderr_buffer, buf, strlen(buf));
943: }
1.70 markus 944:
945: /* restore blocking io */
946: if (!isatty(fileno(stdin)))
947: unset_nonblock(fileno(stdin));
948: if (!isatty(fileno(stdout)))
949: unset_nonblock(fileno(stdout));
950: if (!isatty(fileno(stderr)))
951: unset_nonblock(fileno(stderr));
952:
1.11 markus 953: /* Output any buffered data for stdout. */
1.70 markus 954: while (buffer_len(&stdout_buffer) > 0) {
955: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 956: buffer_len(&stdout_buffer));
1.70 markus 957: if (len <= 0) {
1.11 markus 958: error("Write failed flushing stdout buffer.");
1.70 markus 959: break;
960: }
1.11 markus 961: buffer_consume(&stdout_buffer, len);
1.57 markus 962: stdout_bytes += len;
1.11 markus 963: }
964:
965: /* Output any buffered data for stderr. */
1.70 markus 966: while (buffer_len(&stderr_buffer) > 0) {
967: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 968: buffer_len(&stderr_buffer));
1.70 markus 969: if (len <= 0) {
1.11 markus 970: error("Write failed flushing stderr buffer.");
1.70 markus 971: break;
972: }
1.11 markus 973: buffer_consume(&stderr_buffer, len);
1.57 markus 974: stderr_bytes += len;
1.11 markus 975: }
976:
977: if (have_pty)
978: leave_raw_mode();
979:
980: /* Clear and free any buffers. */
981: memset(buf, 0, sizeof(buf));
982: buffer_free(&stdin_buffer);
983: buffer_free(&stdout_buffer);
984: buffer_free(&stderr_buffer);
985:
986: /* Report bytes transferred, and transfer rates. */
987: total_time = get_current_time() - start_time;
988: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
989: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
990: if (total_time > 0)
991: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
992: stdin_bytes / total_time, stdout_bytes / total_time,
993: stderr_bytes / total_time);
994:
995: /* Return the exit status of the program. */
996: debug("Exit status %d", exit_status);
997: return exit_status;
1.15 markus 998: }
999:
1000: /*********/
1001:
1002: void
1.36 markus 1003: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 1004: {
1.42 markus 1005: u_int data_len;
1.15 markus 1006: char *data = packet_get_string(&data_len);
1007: packet_integrity_check(plen, 4 + data_len, type);
1008: buffer_append(&stdout_buffer, data, data_len);
1009: memset(data, 0, data_len);
1010: xfree(data);
1011: }
1012: void
1.36 markus 1013: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 1014: {
1.42 markus 1015: u_int data_len;
1.15 markus 1016: char *data = packet_get_string(&data_len);
1017: packet_integrity_check(plen, 4 + data_len, type);
1018: buffer_append(&stderr_buffer, data, data_len);
1019: memset(data, 0, data_len);
1020: xfree(data);
1021: }
1022: void
1.36 markus 1023: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1024: {
1025: packet_integrity_check(plen, 4, type);
1026: exit_status = packet_get_int();
1027: /* Acknowledge the exit. */
1028: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1029: packet_send();
1030: /*
1031: * Must wait for packet to be sent since we are
1032: * exiting the loop.
1033: */
1034: packet_write_wait();
1035: /* Flag that we want to exit. */
1036: quit_pending = 1;
1037: }
1038:
1.40 markus 1039: Channel *
1040: client_request_forwarded_tcpip(const char *request_type, int rchan)
1041: {
1042: Channel* c = NULL;
1043: char *listen_address, *originator_address;
1044: int listen_port, originator_port;
1.67 markus 1045: int sock;
1.40 markus 1046:
1047: /* Get rest of the packet */
1048: listen_address = packet_get_string(NULL);
1049: listen_port = packet_get_int();
1050: originator_address = packet_get_string(NULL);
1051: originator_port = packet_get_int();
1052: packet_done();
1053:
1054: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1055: listen_address, listen_port, originator_address, originator_port);
1056:
1057: sock = channel_connect_by_listen_adress(listen_port);
1.67 markus 1058: if (sock < 0) {
1059: xfree(originator_address);
1060: xfree(listen_address);
1061: return NULL;
1062: }
1063: c = channel_new("forwarded-tcpip",
1064: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1065: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1066: xstrdup(originator_address), 1);
1067: if (c == NULL) {
1068: error("client_request_forwarded_tcpip: channel_new failed");
1069: close(sock);
1.40 markus 1070: }
1071: xfree(originator_address);
1072: xfree(listen_address);
1073: return c;
1074: }
1075:
1076: Channel*
1077: client_request_x11(const char *request_type, int rchan)
1078: {
1079: Channel *c = NULL;
1080: char *originator;
1081: int originator_port;
1.67 markus 1082: int sock;
1.40 markus 1083:
1084: if (!options.forward_x11) {
1085: error("Warning: ssh server tried X11 forwarding.");
1086: error("Warning: this is probably a break in attempt by a malicious server.");
1087: return NULL;
1088: }
1089: originator = packet_get_string(NULL);
1090: if (datafellows & SSH_BUG_X11FWD) {
1091: debug2("buggy server: x11 request w/o originator_port");
1092: originator_port = 0;
1093: } else {
1094: originator_port = packet_get_int();
1095: }
1096: packet_done();
1097: /* XXX check permission */
1.47 markus 1098: debug("client_request_x11: request from %s %d", originator,
1099: originator_port);
1.67 markus 1100: xfree(originator);
1.40 markus 1101: sock = x11_connect_display();
1.67 markus 1102: if (sock < 0)
1103: return NULL;
1104: c = channel_new("x11",
1105: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1106: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1107: xstrdup("x11"), 1);
1108: if (c == NULL) {
1109: error("client_request_x11: channel_new failed");
1110: close(sock);
1.40 markus 1111: }
1112: return c;
1113: }
1114:
1115: Channel*
1116: client_request_agent(const char *request_type, int rchan)
1117: {
1118: Channel *c = NULL;
1.67 markus 1119: int sock;
1.40 markus 1120:
1121: if (!options.forward_agent) {
1122: error("Warning: ssh server tried agent forwarding.");
1123: error("Warning: this is probably a break in attempt by a malicious server.");
1124: return NULL;
1125: }
1126: sock = ssh_get_authentication_socket();
1.67 markus 1127: if (sock < 0)
1128: return NULL;
1129: c = channel_new("authentication agent connection",
1130: SSH_CHANNEL_OPEN, sock, sock, -1,
1131: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1132: xstrdup("authentication agent connection"), 1);
1133: if (c == NULL) {
1134: error("client_request_agent: channel_new failed");
1135: close(sock);
1.40 markus 1136: }
1137: return c;
1138: }
1139:
1.22 markus 1140: /* XXXX move to generic input handler */
1141: void
1.36 markus 1142: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1143: {
1144: Channel *c = NULL;
1145: char *ctype;
1.42 markus 1146: u_int len;
1.22 markus 1147: int rchan;
1148: int rmaxpack;
1149: int rwindow;
1150:
1151: ctype = packet_get_string(&len);
1152: rchan = packet_get_int();
1153: rwindow = packet_get_int();
1154: rmaxpack = packet_get_int();
1155:
1.24 markus 1156: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1157: ctype, rchan, rwindow, rmaxpack);
1158:
1.40 markus 1159: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1160: c = client_request_forwarded_tcpip(ctype, rchan);
1161: } else if (strcmp(ctype, "x11") == 0) {
1162: c = client_request_x11(ctype, rchan);
1163: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1164: c = client_request_agent(ctype, rchan);
1.22 markus 1165: }
1166: /* XXX duplicate : */
1167: if (c != NULL) {
1168: debug("confirm %s", ctype);
1169: c->remote_id = rchan;
1170: c->remote_window = rwindow;
1171: c->remote_maxpacket = rmaxpack;
1.69 markus 1172: if (c->type != SSH_CHANNEL_CONNECTING) {
1173: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1174: packet_put_int(c->remote_id);
1175: packet_put_int(c->self);
1176: packet_put_int(c->local_window);
1177: packet_put_int(c->local_maxpacket);
1178: packet_send();
1179: }
1.22 markus 1180: } else {
1181: debug("failure %s", ctype);
1182: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1183: packet_put_int(rchan);
1184: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1.66 markus 1185: if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1.69 markus 1186: packet_put_cstring("open failed");
1.66 markus 1187: packet_put_cstring("");
1188: }
1.22 markus 1189: packet_send();
1190: }
1191: xfree(ctype);
1192: }
1.48 markus 1193: void
1194: client_input_channel_req(int type, int plen, void *ctxt)
1195: {
1196: Channel *c = NULL;
1197: int id, reply, success = 0;
1198: char *rtype;
1199:
1200: id = packet_get_int();
1201: rtype = packet_get_string(NULL);
1202: reply = packet_get_char();
1203:
1204: debug("client_input_channel_req: channel %d rtype %s reply %d",
1205: id, rtype, reply);
1206:
1207: if (session_ident == -1) {
1208: error("client_input_channel_req: no channel %d", session_ident);
1209: } else if (id != session_ident) {
1210: error("client_input_channel_req: channel %d: wrong channel: %d",
1211: session_ident, id);
1212: }
1213: c = channel_lookup(id);
1214: if (c == NULL) {
1215: error("client_input_channel_req: channel %d: unknown channel", id);
1216: } else if (strcmp(rtype, "exit-status") == 0) {
1217: success = 1;
1218: exit_status = packet_get_int();
1219: packet_done();
1220: }
1221: if (reply) {
1222: packet_start(success ?
1223: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1224: packet_put_int(c->remote_id);
1225: packet_send();
1226: }
1227: xfree(rtype);
1228: }
1.22 markus 1229:
1.20 markus 1230: void
1.49 itojun 1231: client_init_dispatch_20(void)
1.16 markus 1232: {
1.55 markus 1233: dispatch_init(&dispatch_protocol_error);
1.16 markus 1234: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1235: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1236: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1237: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1238: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1239: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1240: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1241: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1242: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1243:
1244: /* rekeying */
1245: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1246: }
1.20 markus 1247: void
1.49 itojun 1248: client_init_dispatch_13(void)
1.15 markus 1249: {
1250: dispatch_init(NULL);
1251: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1252: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1253: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1254: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1255: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1256: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1257: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1258: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1259: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1260:
1261: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1262: &auth_input_open_request : &deny_input_open);
1263: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1264: &x11_input_open : &deny_input_open);
1.15 markus 1265: }
1.20 markus 1266: void
1.49 itojun 1267: client_init_dispatch_15(void)
1.15 markus 1268: {
1269: client_init_dispatch_13();
1270: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1271: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1272: }
1.20 markus 1273: void
1.49 itojun 1274: client_init_dispatch(void)
1.15 markus 1275: {
1.16 markus 1276: if (compat20)
1277: client_init_dispatch_20();
1278: else if (compat13)
1.15 markus 1279: client_init_dispatch_13();
1280: else
1281: client_init_dispatch_15();
1.1 deraadt 1282: }
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