Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.57
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"
1.57 ! markus 62: RCSID("$OpenBSD: clientloop.c,v 1.56 2001/04/04 20:25:37 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"
1.39 markus 82:
83: /* import options */
84: extern Options options;
85:
1.1 deraadt 86: /* Flag indicating that stdin should be redirected from /dev/null. */
87: extern int stdin_null_flag;
88:
1.13 markus 89: /*
90: * Name of the host we are connecting to. This is the name given on the
91: * command line, or the HostName specified for the user-supplied name in a
92: * configuration file.
93: */
1.1 deraadt 94: extern char *host;
95:
1.13 markus 96: /*
97: * Flag to indicate that we have received a window change signal which has
98: * not yet been processed. This will cause a message indicating the new
99: * window size to be sent to the server a little later. This is volatile
100: * because this is updated in a signal handler.
101: */
1.1 deraadt 102: static volatile int received_window_change_signal = 0;
103:
104: /* Terminal modes, as saved by enter_raw_mode. */
105: static struct termios saved_tio;
106:
1.13 markus 107: /*
108: * Flag indicating whether we are in raw mode. This is used by
109: * enter_raw_mode and leave_raw_mode.
110: */
1.1 deraadt 111: static int in_raw_mode = 0;
112:
113: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
114: static int in_non_blocking_mode = 0;
115:
116: /* Common data for the client loop code. */
1.31 markus 117: static int quit_pending; /* Set to non-zero to quit the client loop. */
118: static int escape_char; /* Escape character. */
1.11 markus 119: static int escape_pending; /* Last character was the escape character */
120: static int last_was_cr; /* Last character was a newline. */
121: static int exit_status; /* Used to store the exit status of the command. */
122: static int stdin_eof; /* EOF has been encountered on standard error. */
123: static Buffer stdin_buffer; /* Buffer for stdin data. */
124: static Buffer stdout_buffer; /* Buffer for stdout data. */
125: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 126: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
127: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 128: static int connection_in; /* Connection to server (input). */
129: static int connection_out; /* Connection to server (output). */
1.56 markus 130: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.1 deraadt 131:
1.16 markus 132: void client_init_dispatch(void);
133: int session_ident = -1;
134:
1.54 markus 135: /*XXX*/
136: extern Kex *xxx_kex;
137:
1.13 markus 138: /* Returns the user\'s terminal to normal mode if it had been put in raw mode. */
1.1 deraadt 139:
1.20 markus 140: void
1.49 itojun 141: leave_raw_mode(void)
1.1 deraadt 142: {
1.11 markus 143: if (!in_raw_mode)
144: return;
145: in_raw_mode = 0;
146: if (tcsetattr(fileno(stdin), TCSADRAIN, &saved_tio) < 0)
147: perror("tcsetattr");
1.1 deraadt 148:
1.11 markus 149: fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
1.1 deraadt 150: }
151:
152: /* Puts the user\'s terminal in raw mode. */
153:
1.20 markus 154: void
1.49 itojun 155: enter_raw_mode(void)
1.1 deraadt 156: {
1.11 markus 157: struct termios tio;
1.1 deraadt 158:
1.11 markus 159: if (tcgetattr(fileno(stdin), &tio) < 0)
160: perror("tcgetattr");
161: saved_tio = tio;
162: tio.c_iflag |= IGNPAR;
163: tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
164: tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
1.1 deraadt 165: #ifdef IEXTEN
1.11 markus 166: tio.c_lflag &= ~IEXTEN;
167: #endif /* IEXTEN */
168: tio.c_oflag &= ~OPOST;
169: tio.c_cc[VMIN] = 1;
170: tio.c_cc[VTIME] = 0;
171: if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) < 0)
172: perror("tcsetattr");
173: in_raw_mode = 1;
1.1 deraadt 174:
1.11 markus 175: fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
176: }
1.1 deraadt 177:
178: /* Restores stdin to blocking mode. */
179:
1.20 markus 180: void
1.49 itojun 181: leave_non_blocking(void)
1.1 deraadt 182: {
1.11 markus 183: if (in_non_blocking_mode) {
184: (void) fcntl(fileno(stdin), F_SETFL, 0);
185: in_non_blocking_mode = 0;
186: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
187: }
1.1 deraadt 188: }
189:
1.11 markus 190: /* Puts stdin terminal in non-blocking mode. */
191:
1.20 markus 192: void
1.49 itojun 193: enter_non_blocking(void)
1.1 deraadt 194: {
1.11 markus 195: in_non_blocking_mode = 1;
196: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
197: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 198: }
199:
1.13 markus 200: /*
201: * Signal handler for the window change signal (SIGWINCH). This just sets a
202: * flag indicating that the window has changed.
203: */
1.1 deraadt 204:
1.20 markus 205: void
1.11 markus 206: window_change_handler(int sig)
1.1 deraadt 207: {
1.11 markus 208: received_window_change_signal = 1;
209: signal(SIGWINCH, window_change_handler);
1.1 deraadt 210: }
211:
1.13 markus 212: /*
213: * Signal handler for signals that cause the program to terminate. These
214: * signals must be trapped to restore terminal modes.
215: */
1.1 deraadt 216:
1.20 markus 217: void
1.11 markus 218: signal_handler(int sig)
1.1 deraadt 219: {
1.11 markus 220: if (in_raw_mode)
221: leave_raw_mode();
222: if (in_non_blocking_mode)
223: leave_non_blocking();
224: channel_stop_listening();
225: packet_close();
226: fatal("Killed by signal %d.", sig);
1.1 deraadt 227: }
228:
1.13 markus 229: /*
230: * Returns current time in seconds from Jan 1, 1970 with the maximum
231: * available resolution.
232: */
1.1 deraadt 233:
1.20 markus 234: double
1.49 itojun 235: get_current_time(void)
1.1 deraadt 236: {
1.11 markus 237: struct timeval tv;
238: gettimeofday(&tv, NULL);
239: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 240: }
241:
1.13 markus 242: /*
243: * This is called when the interactive is entered. This checks if there is
244: * an EOF coming on stdin. We must check this explicitly, as select() does
245: * not appear to wake up when redirecting from /dev/null.
246: */
1.1 deraadt 247:
1.20 markus 248: void
1.49 itojun 249: client_check_initial_eof_on_stdin(void)
1.1 deraadt 250: {
1.11 markus 251: int len;
252: char buf[1];
1.1 deraadt 253:
1.13 markus 254: /*
255: * If standard input is to be "redirected from /dev/null", we simply
256: * mark that we have seen an EOF and send an EOF message to the
257: * server. Otherwise, we try to read a single character; it appears
258: * that for some files, such /dev/null, select() never wakes up for
259: * read for this descriptor, which means that we never get EOF. This
260: * way we will get the EOF if stdin comes from /dev/null or similar.
261: */
1.11 markus 262: if (stdin_null_flag) {
263: /* Fake EOF on stdin. */
264: debug("Sending eof.");
265: stdin_eof = 1;
266: packet_start(SSH_CMSG_EOF);
267: packet_send();
268: } else {
269: enter_non_blocking();
270:
271: /* Check for immediate EOF on stdin. */
272: len = read(fileno(stdin), buf, 1);
273: if (len == 0) {
1.13 markus 274: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 275: debug("Sending eof.");
276: stdin_eof = 1;
277: packet_start(SSH_CMSG_EOF);
278: packet_send();
279: } else if (len > 0) {
1.13 markus 280: /*
281: * Got data. We must store the data in the buffer,
282: * and also process it as an escape character if
283: * appropriate.
284: */
1.42 markus 285: if ((u_char) buf[0] == escape_char)
1.11 markus 286: escape_pending = 1;
1.52 markus 287: else
1.11 markus 288: buffer_append(&stdin_buffer, buf, 1);
289: }
290: leave_non_blocking();
291: }
1.1 deraadt 292: }
293:
294:
1.13 markus 295: /*
296: * Make packets from buffered stdin data, and buffer them for sending to the
297: * connection.
298: */
1.1 deraadt 299:
1.20 markus 300: void
1.49 itojun 301: client_make_packets_from_stdin_data(void)
1.1 deraadt 302: {
1.42 markus 303: u_int len;
1.1 deraadt 304:
1.11 markus 305: /* Send buffered stdin data to the server. */
306: while (buffer_len(&stdin_buffer) > 0 &&
307: packet_not_very_much_data_to_write()) {
308: len = buffer_len(&stdin_buffer);
309: /* Keep the packets at reasonable size. */
310: if (len > packet_get_maxsize())
311: len = packet_get_maxsize();
312: packet_start(SSH_CMSG_STDIN_DATA);
313: packet_put_string(buffer_ptr(&stdin_buffer), len);
314: packet_send();
315: buffer_consume(&stdin_buffer, len);
1.52 markus 316: stdin_bytes += len;
1.11 markus 317: /* If we have a pending EOF, send it now. */
318: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
319: packet_start(SSH_CMSG_EOF);
320: packet_send();
321: }
1.1 deraadt 322: }
323: }
324:
1.13 markus 325: /*
326: * Checks if the client window has changed, and sends a packet about it to
327: * the server if so. The actual change is detected elsewhere (by a software
328: * interrupt on Unix); this just checks the flag and sends a message if
329: * appropriate.
330: */
1.1 deraadt 331:
1.20 markus 332: void
1.49 itojun 333: client_check_window_change(void)
1.1 deraadt 334: {
1.16 markus 335: struct winsize ws;
336:
337: if (! received_window_change_signal)
338: return;
339: /** XXX race */
340: received_window_change_signal = 0;
341:
342: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
343: return;
344:
1.37 markus 345: debug2("client_check_window_change: changed");
1.16 markus 346:
347: if (compat20) {
348: channel_request_start(session_ident, "window-change", 0);
349: packet_put_int(ws.ws_col);
350: packet_put_int(ws.ws_row);
351: packet_put_int(ws.ws_xpixel);
352: packet_put_int(ws.ws_ypixel);
353: packet_send();
354: } else {
355: packet_start(SSH_CMSG_WINDOW_SIZE);
356: packet_put_int(ws.ws_row);
357: packet_put_int(ws.ws_col);
358: packet_put_int(ws.ws_xpixel);
359: packet_put_int(ws.ws_ypixel);
360: packet_send();
1.1 deraadt 361: }
362: }
363:
1.13 markus 364: /*
365: * Waits until the client can do something (some data becomes available on
366: * one of the file descriptors).
367: */
1.1 deraadt 368:
1.20 markus 369: void
1.46 markus 370: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.56 markus 371: int *maxfdp, int rekeying)
1.11 markus 372: {
1.46 markus 373: /* Add any selections by the channel mechanism. */
1.56 markus 374: channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
1.11 markus 375:
1.16 markus 376: if (!compat20) {
1.17 markus 377: /* Read from the connection, unless our buffers are full. */
1.16 markus 378: if (buffer_len(&stdout_buffer) < buffer_high &&
379: buffer_len(&stderr_buffer) < buffer_high &&
380: channel_not_very_much_buffered_data())
1.46 markus 381: FD_SET(connection_in, *readsetp);
1.17 markus 382: /*
383: * Read from stdin, unless we have seen EOF or have very much
384: * buffered data to send to the server.
385: */
386: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 387: FD_SET(fileno(stdin), *readsetp);
1.17 markus 388:
389: /* Select stdout/stderr if have data in buffer. */
390: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 391: FD_SET(fileno(stdout), *writesetp);
1.17 markus 392: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 393: FD_SET(fileno(stderr), *writesetp);
1.16 markus 394: } else {
1.46 markus 395: FD_SET(connection_in, *readsetp);
1.16 markus 396: }
1.11 markus 397:
398: /* Select server connection if have data to write to the server. */
399: if (packet_have_data_to_write())
1.46 markus 400: FD_SET(connection_out, *writesetp);
1.11 markus 401:
1.13 markus 402: /*
403: * Wait for something to happen. This will suspend the process until
404: * some selected descriptor can be read, written, or has some other
405: * event pending. Note: if you want to implement SSH_MSG_IGNORE
406: * messages to fool traffic analysis, this might be the place to do
407: * it: just have a random timeout for the select, and send a random
408: * SSH_MSG_IGNORE packet when the timeout expires.
409: */
1.11 markus 410:
1.46 markus 411: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 412: char buf[100];
1.51 markus 413:
414: /*
415: * We have to clear the select masks, because we return.
416: * We have to return, because the mainloop checks for the flags
417: * set by the signal handlers.
418: */
419: memset(*readsetp, 0, *maxfdp);
420: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 421:
1.11 markus 422: if (errno == EINTR)
423: return;
424: /* Note: we might still have data in the buffers. */
425: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
426: buffer_append(&stderr_buffer, buf, strlen(buf));
427: quit_pending = 1;
428: }
429: }
430:
1.20 markus 431: void
1.31 markus 432: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 433: {
1.11 markus 434: struct winsize oldws, newws;
435:
436: /* Flush stdout and stderr buffers. */
1.31 markus 437: if (buffer_len(bout) > 0)
438: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
439: if (buffer_len(berr) > 0)
440: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 441:
442: leave_raw_mode();
443:
1.13 markus 444: /*
445: * Free (and clear) the buffer to reduce the amount of data that gets
446: * written to swap.
447: */
1.31 markus 448: buffer_free(bin);
449: buffer_free(bout);
450: buffer_free(berr);
1.11 markus 451:
452: /* Save old window size. */
453: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
454:
455: /* Send the suspend signal to the program itself. */
456: kill(getpid(), SIGTSTP);
457:
458: /* Check if the window size has changed. */
459: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
460: (oldws.ws_row != newws.ws_row ||
461: oldws.ws_col != newws.ws_col ||
462: oldws.ws_xpixel != newws.ws_xpixel ||
463: oldws.ws_ypixel != newws.ws_ypixel))
464: received_window_change_signal = 1;
465:
466: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 467: buffer_init(bin);
468: buffer_init(bout);
469: buffer_init(berr);
1.11 markus 470:
471: enter_raw_mode();
472: }
473:
1.20 markus 474: void
1.17 markus 475: client_process_net_input(fd_set * readset)
1.11 markus 476: {
1.17 markus 477: int len;
478: char buf[8192];
1.11 markus 479:
1.13 markus 480: /*
481: * Read input from the server, and add any such data to the buffer of
482: * the packet subsystem.
483: */
1.11 markus 484: if (FD_ISSET(connection_in, readset)) {
485: /* Read as much as possible. */
486: len = read(connection_in, buf, sizeof(buf));
487: if (len == 0) {
488: /* Received EOF. The remote host has closed the connection. */
489: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
490: host);
1.1 deraadt 491: buffer_append(&stderr_buffer, buf, strlen(buf));
492: quit_pending = 1;
493: return;
1.11 markus 494: }
1.13 markus 495: /*
496: * There is a kernel bug on Solaris that causes select to
497: * sometimes wake up even though there is no data available.
498: */
1.53 millert 499: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 500: len = 0;
501:
502: if (len < 0) {
503: /* An error has encountered. Perhaps there is a network problem. */
504: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
505: host, strerror(errno));
506: buffer_append(&stderr_buffer, buf, strlen(buf));
507: quit_pending = 1;
508: return;
509: }
510: packet_process_incoming(buf, len);
511: }
1.17 markus 512: }
1.16 markus 513:
1.31 markus 514: /* process the characters one by one */
515: int
516: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
517: {
1.32 markus 518: char string[1024];
1.31 markus 519: pid_t pid;
520: int bytes = 0;
1.42 markus 521: u_int i;
522: u_char ch;
1.31 markus 523: char *s;
524:
525: for (i = 0; i < len; i++) {
526: /* Get one character at a time. */
527: ch = buf[i];
528:
529: if (escape_pending) {
530: /* We have previously seen an escape character. */
531: /* Clear the flag now. */
532: escape_pending = 0;
533:
534: /* Process the escaped character. */
535: switch (ch) {
536: case '.':
537: /* Terminate the connection. */
1.32 markus 538: snprintf(string, sizeof string, "%c.\r\n", escape_char);
539: buffer_append(berr, string, strlen(string));
1.31 markus 540:
541: quit_pending = 1;
542: return -1;
543:
544: case 'Z' - 64:
545: /* Suspend the program. */
546: /* Print a message to that effect to the user. */
1.32 markus 547: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
548: buffer_append(berr, string, strlen(string));
1.31 markus 549:
550: /* Restore terminal modes and suspend. */
551: client_suspend_self(bin, bout, berr);
552:
553: /* We have been continued. */
554: continue;
555:
1.54 markus 556: case 'R':
1.56 markus 557: if (compat20)
558: need_rekeying = 1;
1.54 markus 559: continue;
560:
1.31 markus 561: case '&':
562: /* XXX does not work yet with proto 2 */
563: if (compat20)
564: continue;
565: /*
566: * Detach the program (continue to serve connections,
567: * but put in background and no more new connections).
568: */
569: if (!stdin_eof) {
570: /*
571: * Sending SSH_CMSG_EOF alone does not always appear
572: * to be enough. So we try to send an EOF character
573: * first.
574: */
575: packet_start(SSH_CMSG_STDIN_DATA);
576: packet_put_string("\004", 1);
577: packet_send();
578: /* Close stdin. */
579: stdin_eof = 1;
580: if (buffer_len(bin) == 0) {
581: packet_start(SSH_CMSG_EOF);
582: packet_send();
583: }
584: }
585: /* Restore tty modes. */
586: leave_raw_mode();
587:
588: /* Stop listening for new connections. */
589: channel_stop_listening();
590:
591: printf("%c& [backgrounded]\n", escape_char);
592:
593: /* Fork into background. */
594: pid = fork();
595: if (pid < 0) {
596: error("fork: %.100s", strerror(errno));
597: continue;
598: }
599: if (pid != 0) { /* This is the parent. */
600: /* The parent just exits. */
601: exit(0);
602: }
603: /* The child continues serving connections. */
604: continue; /*XXX ? */
605:
606: case '?':
1.32 markus 607: snprintf(string, sizeof string,
1.31 markus 608: "%c?\r\n\
609: Supported escape sequences:\r\n\
610: ~. - terminate connection\r\n\
611: ~^Z - suspend ssh\r\n\
612: ~# - list forwarded connections\r\n\
613: ~& - background ssh (when waiting for connections to terminate)\r\n\
614: ~? - this message\r\n\
615: ~~ - send the escape character by typing it twice\r\n\
616: (Note that escapes are only recognized immediately after newline.)\r\n",
617: escape_char);
1.32 markus 618: buffer_append(berr, string, strlen(string));
1.31 markus 619: continue;
620:
621: case '#':
1.32 markus 622: snprintf(string, sizeof string, "%c#\r\n", escape_char);
623: buffer_append(berr, string, strlen(string));
1.31 markus 624: s = channel_open_message();
625: buffer_append(berr, s, strlen(s));
626: xfree(s);
627: continue;
628:
629: default:
630: if (ch != escape_char) {
631: buffer_put_char(bin, escape_char);
632: bytes++;
633: }
634: /* Escaped characters fall through here */
635: break;
636: }
637: } else {
638: /*
639: * The previous character was not an escape char. Check if this
640: * is an escape.
641: */
642: if (last_was_cr && ch == escape_char) {
643: /* It is. Set the flag and continue to next character. */
644: escape_pending = 1;
645: continue;
646: }
647: }
648:
649: /*
650: * Normal character. Record whether it was a newline,
651: * and append it to the buffer.
652: */
653: last_was_cr = (ch == '\r' || ch == '\n');
654: buffer_put_char(bin, ch);
655: bytes++;
656: }
657: return bytes;
658: }
659:
1.20 markus 660: void
1.17 markus 661: client_process_input(fd_set * readset)
662: {
1.21 deraadt 663: int len;
1.31 markus 664: char buf[8192];
1.16 markus 665:
1.11 markus 666: /* Read input from stdin. */
667: if (FD_ISSET(fileno(stdin), readset)) {
668: /* Read as much as possible. */
669: len = read(fileno(stdin), buf, sizeof(buf));
670: if (len <= 0) {
1.13 markus 671: /*
672: * Received EOF or error. They are treated
673: * similarly, except that an error message is printed
674: * if it was an error condition.
675: */
1.11 markus 676: if (len < 0) {
677: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
678: buffer_append(&stderr_buffer, buf, strlen(buf));
679: }
680: /* Mark that we have seen EOF. */
681: stdin_eof = 1;
1.13 markus 682: /*
683: * Send an EOF message to the server unless there is
684: * data in the buffer. If there is data in the
685: * buffer, no message will be sent now. Code
686: * elsewhere will send the EOF when the buffer
687: * becomes empty if stdin_eof is set.
688: */
1.11 markus 689: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 690: packet_start(SSH_CMSG_EOF);
691: packet_send();
1.11 markus 692: }
693: } else if (escape_char == -1) {
1.13 markus 694: /*
695: * Normal successful read, and no escape character.
696: * Just append the data to buffer.
697: */
1.11 markus 698: buffer_append(&stdin_buffer, buf, len);
699: } else {
1.13 markus 700: /*
701: * Normal, successful read. But we have an escape character
702: * and have to process the characters one by one.
703: */
1.52 markus 704: if (process_escapes(&stdin_buffer, &stdout_buffer,
705: &stderr_buffer, buf, len) == -1)
1.31 markus 706: return;
1.11 markus 707: }
708: }
709: }
710:
1.20 markus 711: void
1.11 markus 712: client_process_output(fd_set * writeset)
713: {
714: int len;
715: char buf[100];
1.1 deraadt 716:
1.11 markus 717: /* Write buffered output to stdout. */
718: if (FD_ISSET(fileno(stdout), writeset)) {
719: /* Write as much data as possible. */
720: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 721: buffer_len(&stdout_buffer));
1.11 markus 722: if (len <= 0) {
723: if (errno == EAGAIN)
724: len = 0;
725: else {
1.13 markus 726: /*
727: * An error or EOF was encountered. Put an
728: * error message to stderr buffer.
729: */
1.11 markus 730: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
731: buffer_append(&stderr_buffer, buf, strlen(buf));
732: quit_pending = 1;
733: return;
734: }
735: }
736: /* Consume printed data from the buffer. */
737: buffer_consume(&stdout_buffer, len);
1.57 ! markus 738: stdout_bytes += len;
1.11 markus 739: }
740: /* Write buffered output to stderr. */
741: if (FD_ISSET(fileno(stderr), writeset)) {
742: /* Write as much data as possible. */
743: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 744: buffer_len(&stderr_buffer));
1.11 markus 745: if (len <= 0) {
746: if (errno == EAGAIN)
747: len = 0;
748: else {
1.13 markus 749: /* EOF or error, but can't even print error message. */
1.11 markus 750: quit_pending = 1;
751: return;
752: }
753: }
754: /* Consume printed characters from the buffer. */
755: buffer_consume(&stderr_buffer, len);
1.57 ! markus 756: stderr_bytes += len;
1.11 markus 757: }
1.1 deraadt 758: }
759:
1.13 markus 760: /*
1.15 markus 761: * Get packets from the connection input buffer, and process them as long as
762: * there are packets available.
763: *
764: * Any unknown packets received during the actual
765: * session cause the session to terminate. This is
766: * intended to make debugging easier since no
767: * confirmations are sent. Any compatible protocol
768: * extensions must be negotiated during the
769: * preparatory phase.
770: */
771:
1.20 markus 772: void
1.49 itojun 773: client_process_buffered_input_packets(void)
1.15 markus 774: {
1.54 markus 775: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 776: }
777:
1.31 markus 778: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 779:
780: int
1.31 markus 781: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 782: {
1.31 markus 783: /* XXX we assume c->extended is writeable */
784: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 785: }
786:
1.15 markus 787: /*
1.13 markus 788: * Implements the interactive session with the server. This is called after
789: * the user has been authenticated, and a command has been started on the
790: * remote host. If escape_char != -1, it is the character used as an escape
791: * character for terminating or suspending the session.
792: */
1.1 deraadt 793:
1.20 markus 794: int
1.30 markus 795: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 796: {
1.46 markus 797: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 798: double start_time, total_time;
1.56 markus 799: int max_fd = 0, len, rekeying = 0;
1.11 markus 800: char buf[100];
801:
802: debug("Entering interactive session.");
803:
804: start_time = get_current_time();
805:
806: /* Initialize variables. */
807: escape_pending = 0;
808: last_was_cr = 1;
809: exit_status = -1;
810: stdin_eof = 0;
811: buffer_high = 64 * 1024;
812: connection_in = packet_get_connection_in();
813: connection_out = packet_get_connection_out();
1.46 markus 814: max_fd = MAX(connection_in, connection_out);
815:
816: if (!compat20) {
817: max_fd = MAX(max_fd, fileno(stdin));
818: max_fd = MAX(max_fd, fileno(stdout));
819: max_fd = MAX(max_fd, fileno(stderr));
820: }
1.11 markus 821: stdin_bytes = 0;
822: stdout_bytes = 0;
823: stderr_bytes = 0;
824: quit_pending = 0;
825: escape_char = escape_char_arg;
826:
827: /* Initialize buffers. */
828: buffer_init(&stdin_buffer);
829: buffer_init(&stdout_buffer);
830: buffer_init(&stderr_buffer);
831:
1.15 markus 832: client_init_dispatch();
833:
1.11 markus 834: /* Set signal handlers to restore non-blocking mode. */
835: signal(SIGINT, signal_handler);
836: signal(SIGQUIT, signal_handler);
837: signal(SIGTERM, signal_handler);
838: signal(SIGPIPE, SIG_IGN);
839: if (have_pty)
840: signal(SIGWINCH, window_change_handler);
841:
842: if (have_pty)
843: enter_raw_mode();
844:
1.48 markus 845: if (compat20) {
846: session_ident = ssh2_chan_id;
847: if (escape_char != -1)
848: channel_register_filter(session_ident,
849: simple_escape_filter);
850: } else {
851: /* Check if we should immediately send eof on stdin. */
1.16 markus 852: client_check_initial_eof_on_stdin();
1.48 markus 853: }
1.30 markus 854:
1.11 markus 855: /* Main loop of the client for the interactive session mode. */
856: while (!quit_pending) {
857:
1.13 markus 858: /* Process buffered packets sent by the server. */
1.11 markus 859: client_process_buffered_input_packets();
860:
1.56 markus 861: rekeying = (xxx_kex != NULL && !xxx_kex->done);
862:
1.16 markus 863: if (compat20 && !channel_still_open()) {
1.37 markus 864: debug2("!channel_still_open.");
1.16 markus 865: break;
866: }
867:
1.56 markus 868: if (rekeying) {
869: debug("rekeying in progress");
870: } else {
871: /*
872: * Make packets of buffered stdin data, and buffer
873: * them for sending to the server.
874: */
875: if (!compat20)
876: client_make_packets_from_stdin_data();
1.11 markus 877:
1.56 markus 878: /*
879: * Make packets from buffered channel data, and
880: * enqueue them for sending to the server.
881: */
882: if (packet_not_very_much_data_to_write())
883: channel_output_poll();
1.11 markus 884:
1.56 markus 885: /*
886: * Check if the window size has changed, and buffer a
887: * message about it to the server if so.
888: */
889: client_check_window_change();
1.11 markus 890:
1.56 markus 891: if (quit_pending)
892: break;
893: }
1.13 markus 894: /*
895: * Wait until we have something to do (something becomes
896: * available on one of the descriptors).
897: */
1.56 markus 898: client_wait_until_can_do_something(&readset, &writeset,
899: &max_fd, rekeying);
1.11 markus 900:
901: if (quit_pending)
902: break;
903:
1.56 markus 904: /* Do channel operations unless rekeying in progress. */
905: if (!rekeying) {
906: channel_after_select(readset, writeset);
907:
908: if (need_rekeying) {
909: debug("user requests rekeying");
910: xxx_kex->done = 0;
911: kex_send_kexinit(xxx_kex);
912: need_rekeying = 0;
913: }
914: }
1.11 markus 915:
1.17 markus 916: /* Buffer input from the connection. */
1.46 markus 917: client_process_net_input(readset);
1.17 markus 918:
919: if (quit_pending)
920: break;
1.11 markus 921:
1.17 markus 922: if (!compat20) {
923: /* Buffer data from stdin */
1.46 markus 924: client_process_input(readset);
1.17 markus 925: /*
926: * Process output to stdout and stderr. Output to
927: * the connection is processed elsewhere (above).
928: */
1.46 markus 929: client_process_output(writeset);
1.17 markus 930: }
1.11 markus 931:
1.13 markus 932: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 933: if (FD_ISSET(connection_out, writeset))
1.11 markus 934: packet_write_poll();
935: }
1.46 markus 936: if (readset)
937: xfree(readset);
938: if (writeset)
939: xfree(writeset);
1.11 markus 940:
941: /* Terminate the session. */
942:
943: /* Stop watching for window change. */
944: if (have_pty)
945: signal(SIGWINCH, SIG_DFL);
946:
947: /* Stop listening for connections. */
948: channel_stop_listening();
949:
1.13 markus 950: /*
951: * In interactive mode (with pseudo tty) display a message indicating
952: * that the connection has been closed.
953: */
1.11 markus 954: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
955: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
956: buffer_append(&stderr_buffer, buf, strlen(buf));
957: }
958: /* Output any buffered data for stdout. */
959: while (buffer_len(&stdout_buffer) > 0) {
960: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 961: buffer_len(&stdout_buffer));
1.11 markus 962: if (len <= 0) {
963: error("Write failed flushing stdout buffer.");
964: break;
965: }
966: buffer_consume(&stdout_buffer, len);
1.57 ! markus 967: stdout_bytes += len;
1.11 markus 968: }
969:
970: /* Output any buffered data for stderr. */
971: while (buffer_len(&stderr_buffer) > 0) {
972: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 973: buffer_len(&stderr_buffer));
1.11 markus 974: if (len <= 0) {
975: error("Write failed flushing stderr buffer.");
976: break;
977: }
978: buffer_consume(&stderr_buffer, len);
1.57 ! markus 979: stderr_bytes += len;
1.11 markus 980: }
981:
982: if (have_pty)
983: leave_raw_mode();
984:
985: /* Clear and free any buffers. */
986: memset(buf, 0, sizeof(buf));
987: buffer_free(&stdin_buffer);
988: buffer_free(&stdout_buffer);
989: buffer_free(&stderr_buffer);
990:
991: /* Report bytes transferred, and transfer rates. */
992: total_time = get_current_time() - start_time;
993: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
994: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
995: if (total_time > 0)
996: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
997: stdin_bytes / total_time, stdout_bytes / total_time,
998: stderr_bytes / total_time);
999:
1000: /* Return the exit status of the program. */
1001: debug("Exit status %d", exit_status);
1002: return exit_status;
1.15 markus 1003: }
1004:
1005: /*********/
1006:
1007: void
1.36 markus 1008: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 1009: {
1.42 markus 1010: u_int data_len;
1.15 markus 1011: char *data = packet_get_string(&data_len);
1012: packet_integrity_check(plen, 4 + data_len, type);
1013: buffer_append(&stdout_buffer, data, data_len);
1014: memset(data, 0, data_len);
1015: xfree(data);
1016: }
1017: void
1.36 markus 1018: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 1019: {
1.42 markus 1020: u_int data_len;
1.15 markus 1021: char *data = packet_get_string(&data_len);
1022: packet_integrity_check(plen, 4 + data_len, type);
1023: buffer_append(&stderr_buffer, data, data_len);
1024: memset(data, 0, data_len);
1025: xfree(data);
1026: }
1027: void
1.36 markus 1028: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1029: {
1030: packet_integrity_check(plen, 4, type);
1031: exit_status = packet_get_int();
1032: /* Acknowledge the exit. */
1033: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1034: packet_send();
1035: /*
1036: * Must wait for packet to be sent since we are
1037: * exiting the loop.
1038: */
1039: packet_write_wait();
1040: /* Flag that we want to exit. */
1041: quit_pending = 1;
1042: }
1043:
1.40 markus 1044: Channel *
1045: client_request_forwarded_tcpip(const char *request_type, int rchan)
1046: {
1047: Channel* c = NULL;
1048: char *listen_address, *originator_address;
1049: int listen_port, originator_port;
1050: int sock, newch;
1051:
1052: /* Get rest of the packet */
1053: listen_address = packet_get_string(NULL);
1054: listen_port = packet_get_int();
1055: originator_address = packet_get_string(NULL);
1056: originator_port = packet_get_int();
1057: packet_done();
1058:
1059: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1060: listen_address, listen_port, originator_address, originator_port);
1061:
1062: sock = channel_connect_by_listen_adress(listen_port);
1063: if (sock >= 0) {
1064: newch = channel_new("forwarded-tcpip",
1.41 markus 1065: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1066: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1067: xstrdup(originator_address), 1);
1068: c = channel_lookup(newch);
1069: }
1070: xfree(originator_address);
1071: xfree(listen_address);
1072: return c;
1073: }
1074:
1075: Channel*
1076: client_request_x11(const char *request_type, int rchan)
1077: {
1078: Channel *c = NULL;
1079: char *originator;
1080: int originator_port;
1081: int sock, newch;
1082:
1083: if (!options.forward_x11) {
1084: error("Warning: ssh server tried X11 forwarding.");
1085: error("Warning: this is probably a break in attempt by a malicious server.");
1086: return NULL;
1087: }
1088: originator = packet_get_string(NULL);
1089: if (datafellows & SSH_BUG_X11FWD) {
1090: debug2("buggy server: x11 request w/o originator_port");
1091: originator_port = 0;
1092: } else {
1093: originator_port = packet_get_int();
1094: }
1095: packet_done();
1096: /* XXX check permission */
1.47 markus 1097: debug("client_request_x11: request from %s %d", originator,
1098: originator_port);
1.40 markus 1099: sock = x11_connect_display();
1100: if (sock >= 0) {
1101: newch = channel_new("x11",
1102: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1103: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1104: xstrdup("x11"), 1);
1105: c = channel_lookup(newch);
1106: }
1107: xfree(originator);
1108: return c;
1109: }
1110:
1111: Channel*
1112: client_request_agent(const char *request_type, int rchan)
1113: {
1114: Channel *c = NULL;
1115: int sock, newch;
1116:
1117: if (!options.forward_agent) {
1118: error("Warning: ssh server tried agent forwarding.");
1119: error("Warning: this is probably a break in attempt by a malicious server.");
1120: return NULL;
1121: }
1122: sock = ssh_get_authentication_socket();
1123: if (sock >= 0) {
1124: newch = channel_new("authentication agent connection",
1125: SSH_CHANNEL_OPEN, sock, sock, -1,
1126: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1127: xstrdup("authentication agent connection"), 1);
1128: c = channel_lookup(newch);
1129: }
1130: return c;
1131: }
1132:
1.22 markus 1133: /* XXXX move to generic input handler */
1134: void
1.36 markus 1135: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1136: {
1137: Channel *c = NULL;
1138: char *ctype;
1.42 markus 1139: u_int len;
1.22 markus 1140: int rchan;
1141: int rmaxpack;
1142: int rwindow;
1143:
1144: ctype = packet_get_string(&len);
1145: rchan = packet_get_int();
1146: rwindow = packet_get_int();
1147: rmaxpack = packet_get_int();
1148:
1.24 markus 1149: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1150: ctype, rchan, rwindow, rmaxpack);
1151:
1.40 markus 1152: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1153: c = client_request_forwarded_tcpip(ctype, rchan);
1154: } else if (strcmp(ctype, "x11") == 0) {
1155: c = client_request_x11(ctype, rchan);
1156: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1157: c = client_request_agent(ctype, rchan);
1.22 markus 1158: }
1159: /* XXX duplicate : */
1160: if (c != NULL) {
1161: debug("confirm %s", ctype);
1162: c->remote_id = rchan;
1163: c->remote_window = rwindow;
1164: c->remote_maxpacket = rmaxpack;
1165:
1166: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1167: packet_put_int(c->remote_id);
1168: packet_put_int(c->self);
1169: packet_put_int(c->local_window);
1170: packet_put_int(c->local_maxpacket);
1171: packet_send();
1172: } else {
1173: debug("failure %s", ctype);
1174: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1175: packet_put_int(rchan);
1176: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1177: packet_put_cstring("bla bla");
1178: packet_put_cstring("");
1179: packet_send();
1180: }
1181: xfree(ctype);
1182: }
1.48 markus 1183: void
1184: client_input_channel_req(int type, int plen, void *ctxt)
1185: {
1186: Channel *c = NULL;
1187: int id, reply, success = 0;
1188: char *rtype;
1189:
1190: id = packet_get_int();
1191: rtype = packet_get_string(NULL);
1192: reply = packet_get_char();
1193:
1194: debug("client_input_channel_req: channel %d rtype %s reply %d",
1195: id, rtype, reply);
1196:
1197: if (session_ident == -1) {
1198: error("client_input_channel_req: no channel %d", session_ident);
1199: } else if (id != session_ident) {
1200: error("client_input_channel_req: channel %d: wrong channel: %d",
1201: session_ident, id);
1202: }
1203: c = channel_lookup(id);
1204: if (c == NULL) {
1205: error("client_input_channel_req: channel %d: unknown channel", id);
1206: } else if (strcmp(rtype, "exit-status") == 0) {
1207: success = 1;
1208: exit_status = packet_get_int();
1209: packet_done();
1210: }
1211: if (reply) {
1212: packet_start(success ?
1213: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1214: packet_put_int(c->remote_id);
1215: packet_send();
1216: }
1217: xfree(rtype);
1218: }
1.22 markus 1219:
1.20 markus 1220: void
1.49 itojun 1221: client_init_dispatch_20(void)
1.16 markus 1222: {
1.55 markus 1223: dispatch_init(&dispatch_protocol_error);
1.16 markus 1224: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1225: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1226: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1227: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1228: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1229: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1230: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1231: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1232: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1233:
1234: /* rekeying */
1235: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1236: }
1.20 markus 1237: void
1.49 itojun 1238: client_init_dispatch_13(void)
1.15 markus 1239: {
1240: dispatch_init(NULL);
1241: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1242: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1243: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1244: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1245: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1246: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1247: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1248: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1249: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1250:
1251: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1252: &auth_input_open_request : &deny_input_open);
1253: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1254: &x11_input_open : &deny_input_open);
1.15 markus 1255: }
1.20 markus 1256: void
1.49 itojun 1257: client_init_dispatch_15(void)
1.15 markus 1258: {
1259: client_init_dispatch_13();
1260: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1261: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1262: }
1.20 markus 1263: void
1.49 itojun 1264: client_init_dispatch(void)
1.15 markus 1265: {
1.16 markus 1266: if (compat20)
1267: client_init_dispatch_20();
1268: else if (compat13)
1.15 markus 1269: client_init_dispatch_13();
1270: else
1271: client_init_dispatch_15();
1.1 deraadt 1272: }
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