Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.54
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"
1.54 ! markus 62: RCSID("$OpenBSD: clientloop.c,v 1.53 2001/03/06 01:08:27 millert 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). */
1.1 deraadt 130:
1.16 markus 131: void client_init_dispatch(void);
132: int session_ident = -1;
133:
1.54 ! markus 134: /*XXX*/
! 135: extern Kex *xxx_kex;
! 136:
1.13 markus 137: /* Returns the user\'s terminal to normal mode if it had been put in raw mode. */
1.1 deraadt 138:
1.20 markus 139: void
1.49 itojun 140: leave_raw_mode(void)
1.1 deraadt 141: {
1.11 markus 142: if (!in_raw_mode)
143: return;
144: in_raw_mode = 0;
145: if (tcsetattr(fileno(stdin), TCSADRAIN, &saved_tio) < 0)
146: perror("tcsetattr");
1.1 deraadt 147:
1.11 markus 148: fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
1.1 deraadt 149: }
150:
151: /* Puts the user\'s terminal in raw mode. */
152:
1.20 markus 153: void
1.49 itojun 154: enter_raw_mode(void)
1.1 deraadt 155: {
1.11 markus 156: struct termios tio;
1.1 deraadt 157:
1.11 markus 158: if (tcgetattr(fileno(stdin), &tio) < 0)
159: perror("tcgetattr");
160: saved_tio = tio;
161: tio.c_iflag |= IGNPAR;
162: tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
163: tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
1.1 deraadt 164: #ifdef IEXTEN
1.11 markus 165: tio.c_lflag &= ~IEXTEN;
166: #endif /* IEXTEN */
167: tio.c_oflag &= ~OPOST;
168: tio.c_cc[VMIN] = 1;
169: tio.c_cc[VTIME] = 0;
170: if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) < 0)
171: perror("tcsetattr");
172: in_raw_mode = 1;
1.1 deraadt 173:
1.11 markus 174: fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
175: }
1.1 deraadt 176:
177: /* Restores stdin to blocking mode. */
178:
1.20 markus 179: void
1.49 itojun 180: leave_non_blocking(void)
1.1 deraadt 181: {
1.11 markus 182: if (in_non_blocking_mode) {
183: (void) fcntl(fileno(stdin), F_SETFL, 0);
184: in_non_blocking_mode = 0;
185: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
186: }
1.1 deraadt 187: }
188:
1.11 markus 189: /* Puts stdin terminal in non-blocking mode. */
190:
1.20 markus 191: void
1.49 itojun 192: enter_non_blocking(void)
1.1 deraadt 193: {
1.11 markus 194: in_non_blocking_mode = 1;
195: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
196: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 197: }
198:
1.13 markus 199: /*
200: * Signal handler for the window change signal (SIGWINCH). This just sets a
201: * flag indicating that the window has changed.
202: */
1.1 deraadt 203:
1.20 markus 204: void
1.11 markus 205: window_change_handler(int sig)
1.1 deraadt 206: {
1.11 markus 207: received_window_change_signal = 1;
208: signal(SIGWINCH, window_change_handler);
1.1 deraadt 209: }
210:
1.13 markus 211: /*
212: * Signal handler for signals that cause the program to terminate. These
213: * signals must be trapped to restore terminal modes.
214: */
1.1 deraadt 215:
1.20 markus 216: void
1.11 markus 217: signal_handler(int sig)
1.1 deraadt 218: {
1.11 markus 219: if (in_raw_mode)
220: leave_raw_mode();
221: if (in_non_blocking_mode)
222: leave_non_blocking();
223: channel_stop_listening();
224: packet_close();
225: fatal("Killed by signal %d.", sig);
1.1 deraadt 226: }
227:
1.13 markus 228: /*
229: * Returns current time in seconds from Jan 1, 1970 with the maximum
230: * available resolution.
231: */
1.1 deraadt 232:
1.20 markus 233: double
1.49 itojun 234: get_current_time(void)
1.1 deraadt 235: {
1.11 markus 236: struct timeval tv;
237: gettimeofday(&tv, NULL);
238: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 239: }
240:
1.13 markus 241: /*
242: * This is called when the interactive is entered. This checks if there is
243: * an EOF coming on stdin. We must check this explicitly, as select() does
244: * not appear to wake up when redirecting from /dev/null.
245: */
1.1 deraadt 246:
1.20 markus 247: void
1.49 itojun 248: client_check_initial_eof_on_stdin(void)
1.1 deraadt 249: {
1.11 markus 250: int len;
251: char buf[1];
1.1 deraadt 252:
1.13 markus 253: /*
254: * If standard input is to be "redirected from /dev/null", we simply
255: * mark that we have seen an EOF and send an EOF message to the
256: * server. Otherwise, we try to read a single character; it appears
257: * that for some files, such /dev/null, select() never wakes up for
258: * read for this descriptor, which means that we never get EOF. This
259: * way we will get the EOF if stdin comes from /dev/null or similar.
260: */
1.11 markus 261: if (stdin_null_flag) {
262: /* Fake EOF on stdin. */
263: debug("Sending eof.");
264: stdin_eof = 1;
265: packet_start(SSH_CMSG_EOF);
266: packet_send();
267: } else {
268: enter_non_blocking();
269:
270: /* Check for immediate EOF on stdin. */
271: len = read(fileno(stdin), buf, 1);
272: if (len == 0) {
1.13 markus 273: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 274: debug("Sending eof.");
275: stdin_eof = 1;
276: packet_start(SSH_CMSG_EOF);
277: packet_send();
278: } else if (len > 0) {
1.13 markus 279: /*
280: * Got data. We must store the data in the buffer,
281: * and also process it as an escape character if
282: * appropriate.
283: */
1.42 markus 284: if ((u_char) buf[0] == escape_char)
1.11 markus 285: escape_pending = 1;
1.52 markus 286: else
1.11 markus 287: buffer_append(&stdin_buffer, buf, 1);
288: }
289: leave_non_blocking();
290: }
1.1 deraadt 291: }
292:
293:
1.13 markus 294: /*
295: * Make packets from buffered stdin data, and buffer them for sending to the
296: * connection.
297: */
1.1 deraadt 298:
1.20 markus 299: void
1.49 itojun 300: client_make_packets_from_stdin_data(void)
1.1 deraadt 301: {
1.42 markus 302: u_int len;
1.1 deraadt 303:
1.11 markus 304: /* Send buffered stdin data to the server. */
305: while (buffer_len(&stdin_buffer) > 0 &&
306: packet_not_very_much_data_to_write()) {
307: len = buffer_len(&stdin_buffer);
308: /* Keep the packets at reasonable size. */
309: if (len > packet_get_maxsize())
310: len = packet_get_maxsize();
311: packet_start(SSH_CMSG_STDIN_DATA);
312: packet_put_string(buffer_ptr(&stdin_buffer), len);
313: packet_send();
314: buffer_consume(&stdin_buffer, len);
1.52 markus 315: stdin_bytes += len;
1.11 markus 316: /* If we have a pending EOF, send it now. */
317: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
318: packet_start(SSH_CMSG_EOF);
319: packet_send();
320: }
1.1 deraadt 321: }
322: }
323:
1.13 markus 324: /*
325: * Checks if the client window has changed, and sends a packet about it to
326: * the server if so. The actual change is detected elsewhere (by a software
327: * interrupt on Unix); this just checks the flag and sends a message if
328: * appropriate.
329: */
1.1 deraadt 330:
1.20 markus 331: void
1.49 itojun 332: client_check_window_change(void)
1.1 deraadt 333: {
1.16 markus 334: struct winsize ws;
335:
336: if (! received_window_change_signal)
337: return;
338: /** XXX race */
339: received_window_change_signal = 0;
340:
341: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
342: return;
343:
1.37 markus 344: debug2("client_check_window_change: changed");
1.16 markus 345:
346: if (compat20) {
347: channel_request_start(session_ident, "window-change", 0);
348: packet_put_int(ws.ws_col);
349: packet_put_int(ws.ws_row);
350: packet_put_int(ws.ws_xpixel);
351: packet_put_int(ws.ws_ypixel);
352: packet_send();
353: } else {
354: packet_start(SSH_CMSG_WINDOW_SIZE);
355: packet_put_int(ws.ws_row);
356: packet_put_int(ws.ws_col);
357: packet_put_int(ws.ws_xpixel);
358: packet_put_int(ws.ws_ypixel);
359: packet_send();
1.1 deraadt 360: }
361: }
362:
1.13 markus 363: /*
364: * Waits until the client can do something (some data becomes available on
365: * one of the file descriptors).
366: */
1.1 deraadt 367:
1.20 markus 368: void
1.46 markus 369: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
370: int *maxfdp)
1.11 markus 371: {
1.46 markus 372: /* Add any selections by the channel mechanism. */
373: channel_prepare_select(readsetp, writesetp, maxfdp);
1.11 markus 374:
1.16 markus 375: if (!compat20) {
1.17 markus 376: /* Read from the connection, unless our buffers are full. */
1.16 markus 377: if (buffer_len(&stdout_buffer) < buffer_high &&
378: buffer_len(&stderr_buffer) < buffer_high &&
379: channel_not_very_much_buffered_data())
1.46 markus 380: FD_SET(connection_in, *readsetp);
1.17 markus 381: /*
382: * Read from stdin, unless we have seen EOF or have very much
383: * buffered data to send to the server.
384: */
385: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 386: FD_SET(fileno(stdin), *readsetp);
1.17 markus 387:
388: /* Select stdout/stderr if have data in buffer. */
389: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 390: FD_SET(fileno(stdout), *writesetp);
1.17 markus 391: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 392: FD_SET(fileno(stderr), *writesetp);
1.16 markus 393: } else {
1.46 markus 394: FD_SET(connection_in, *readsetp);
1.16 markus 395: }
1.11 markus 396:
397: /* Select server connection if have data to write to the server. */
398: if (packet_have_data_to_write())
1.46 markus 399: FD_SET(connection_out, *writesetp);
1.11 markus 400:
1.13 markus 401: /*
402: * Wait for something to happen. This will suspend the process until
403: * some selected descriptor can be read, written, or has some other
404: * event pending. Note: if you want to implement SSH_MSG_IGNORE
405: * messages to fool traffic analysis, this might be the place to do
406: * it: just have a random timeout for the select, and send a random
407: * SSH_MSG_IGNORE packet when the timeout expires.
408: */
1.11 markus 409:
1.46 markus 410: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 411: char buf[100];
1.51 markus 412:
413: /*
414: * We have to clear the select masks, because we return.
415: * We have to return, because the mainloop checks for the flags
416: * set by the signal handlers.
417: */
418: memset(*readsetp, 0, *maxfdp);
419: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 420:
1.11 markus 421: if (errno == EINTR)
422: return;
423: /* Note: we might still have data in the buffers. */
424: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
425: buffer_append(&stderr_buffer, buf, strlen(buf));
426: quit_pending = 1;
427: }
428: }
429:
1.20 markus 430: void
1.31 markus 431: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 432: {
1.11 markus 433: struct winsize oldws, newws;
434:
435: /* Flush stdout and stderr buffers. */
1.31 markus 436: if (buffer_len(bout) > 0)
437: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
438: if (buffer_len(berr) > 0)
439: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 440:
441: leave_raw_mode();
442:
1.13 markus 443: /*
444: * Free (and clear) the buffer to reduce the amount of data that gets
445: * written to swap.
446: */
1.31 markus 447: buffer_free(bin);
448: buffer_free(bout);
449: buffer_free(berr);
1.11 markus 450:
451: /* Save old window size. */
452: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
453:
454: /* Send the suspend signal to the program itself. */
455: kill(getpid(), SIGTSTP);
456:
457: /* Check if the window size has changed. */
458: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
459: (oldws.ws_row != newws.ws_row ||
460: oldws.ws_col != newws.ws_col ||
461: oldws.ws_xpixel != newws.ws_xpixel ||
462: oldws.ws_ypixel != newws.ws_ypixel))
463: received_window_change_signal = 1;
464:
465: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 466: buffer_init(bin);
467: buffer_init(bout);
468: buffer_init(berr);
1.11 markus 469:
470: enter_raw_mode();
471: }
472:
1.20 markus 473: void
1.17 markus 474: client_process_net_input(fd_set * readset)
1.11 markus 475: {
1.17 markus 476: int len;
477: char buf[8192];
1.11 markus 478:
1.13 markus 479: /*
480: * Read input from the server, and add any such data to the buffer of
481: * the packet subsystem.
482: */
1.11 markus 483: if (FD_ISSET(connection_in, readset)) {
484: /* Read as much as possible. */
485: len = read(connection_in, buf, sizeof(buf));
486: if (len == 0) {
487: /* Received EOF. The remote host has closed the connection. */
488: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
489: host);
1.1 deraadt 490: buffer_append(&stderr_buffer, buf, strlen(buf));
491: quit_pending = 1;
492: return;
1.11 markus 493: }
1.13 markus 494: /*
495: * There is a kernel bug on Solaris that causes select to
496: * sometimes wake up even though there is no data available.
497: */
1.53 millert 498: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 499: len = 0;
500:
501: if (len < 0) {
502: /* An error has encountered. Perhaps there is a network problem. */
503: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
504: host, strerror(errno));
505: buffer_append(&stderr_buffer, buf, strlen(buf));
506: quit_pending = 1;
507: return;
508: }
509: packet_process_incoming(buf, len);
510: }
1.17 markus 511: }
1.16 markus 512:
1.31 markus 513: /* process the characters one by one */
514: int
515: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
516: {
1.32 markus 517: char string[1024];
1.31 markus 518: pid_t pid;
519: int bytes = 0;
1.42 markus 520: u_int i;
521: u_char ch;
1.31 markus 522: char *s;
523:
524: for (i = 0; i < len; i++) {
525: /* Get one character at a time. */
526: ch = buf[i];
527:
528: if (escape_pending) {
529: /* We have previously seen an escape character. */
530: /* Clear the flag now. */
531: escape_pending = 0;
532:
533: /* Process the escaped character. */
534: switch (ch) {
535: case '.':
536: /* Terminate the connection. */
1.32 markus 537: snprintf(string, sizeof string, "%c.\r\n", escape_char);
538: buffer_append(berr, string, strlen(string));
1.31 markus 539:
540: quit_pending = 1;
541: return -1;
542:
543: case 'Z' - 64:
544: /* Suspend the program. */
545: /* Print a message to that effect to the user. */
1.32 markus 546: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
547: buffer_append(berr, string, strlen(string));
1.31 markus 548:
549: /* Restore terminal modes and suspend. */
550: client_suspend_self(bin, bout, berr);
551:
552: /* We have been continued. */
553: continue;
554:
1.54 ! markus 555: case 'R':
! 556: debug("Rekeying");
! 557: kex_send_kexinit(xxx_kex);
! 558: continue;
! 559:
1.31 markus 560: case '&':
561: /* XXX does not work yet with proto 2 */
562: if (compat20)
563: continue;
564: /*
565: * Detach the program (continue to serve connections,
566: * but put in background and no more new connections).
567: */
568: if (!stdin_eof) {
569: /*
570: * Sending SSH_CMSG_EOF alone does not always appear
571: * to be enough. So we try to send an EOF character
572: * first.
573: */
574: packet_start(SSH_CMSG_STDIN_DATA);
575: packet_put_string("\004", 1);
576: packet_send();
577: /* Close stdin. */
578: stdin_eof = 1;
579: if (buffer_len(bin) == 0) {
580: packet_start(SSH_CMSG_EOF);
581: packet_send();
582: }
583: }
584: /* Restore tty modes. */
585: leave_raw_mode();
586:
587: /* Stop listening for new connections. */
588: channel_stop_listening();
589:
590: printf("%c& [backgrounded]\n", escape_char);
591:
592: /* Fork into background. */
593: pid = fork();
594: if (pid < 0) {
595: error("fork: %.100s", strerror(errno));
596: continue;
597: }
598: if (pid != 0) { /* This is the parent. */
599: /* The parent just exits. */
600: exit(0);
601: }
602: /* The child continues serving connections. */
603: continue; /*XXX ? */
604:
605: case '?':
1.32 markus 606: snprintf(string, sizeof string,
1.31 markus 607: "%c?\r\n\
608: Supported escape sequences:\r\n\
609: ~. - terminate connection\r\n\
610: ~^Z - suspend ssh\r\n\
611: ~# - list forwarded connections\r\n\
612: ~& - background ssh (when waiting for connections to terminate)\r\n\
613: ~? - this message\r\n\
614: ~~ - send the escape character by typing it twice\r\n\
615: (Note that escapes are only recognized immediately after newline.)\r\n",
616: escape_char);
1.32 markus 617: buffer_append(berr, string, strlen(string));
1.31 markus 618: continue;
619:
620: case '#':
1.32 markus 621: snprintf(string, sizeof string, "%c#\r\n", escape_char);
622: buffer_append(berr, string, strlen(string));
1.31 markus 623: s = channel_open_message();
624: buffer_append(berr, s, strlen(s));
625: xfree(s);
626: continue;
627:
628: default:
629: if (ch != escape_char) {
630: buffer_put_char(bin, escape_char);
631: bytes++;
632: }
633: /* Escaped characters fall through here */
634: break;
635: }
636: } else {
637: /*
638: * The previous character was not an escape char. Check if this
639: * is an escape.
640: */
641: if (last_was_cr && ch == escape_char) {
642: /* It is. Set the flag and continue to next character. */
643: escape_pending = 1;
644: continue;
645: }
646: }
647:
648: /*
649: * Normal character. Record whether it was a newline,
650: * and append it to the buffer.
651: */
652: last_was_cr = (ch == '\r' || ch == '\n');
653: buffer_put_char(bin, ch);
654: bytes++;
655: }
656: return bytes;
657: }
658:
1.20 markus 659: void
1.17 markus 660: client_process_input(fd_set * readset)
661: {
1.21 deraadt 662: int len;
1.31 markus 663: char buf[8192];
1.16 markus 664:
1.11 markus 665: /* Read input from stdin. */
666: if (FD_ISSET(fileno(stdin), readset)) {
667: /* Read as much as possible. */
668: len = read(fileno(stdin), buf, sizeof(buf));
669: if (len <= 0) {
1.13 markus 670: /*
671: * Received EOF or error. They are treated
672: * similarly, except that an error message is printed
673: * if it was an error condition.
674: */
1.11 markus 675: if (len < 0) {
676: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
677: buffer_append(&stderr_buffer, buf, strlen(buf));
678: }
679: /* Mark that we have seen EOF. */
680: stdin_eof = 1;
1.13 markus 681: /*
682: * Send an EOF message to the server unless there is
683: * data in the buffer. If there is data in the
684: * buffer, no message will be sent now. Code
685: * elsewhere will send the EOF when the buffer
686: * becomes empty if stdin_eof is set.
687: */
1.11 markus 688: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 689: packet_start(SSH_CMSG_EOF);
690: packet_send();
1.11 markus 691: }
692: } else if (escape_char == -1) {
1.13 markus 693: /*
694: * Normal successful read, and no escape character.
695: * Just append the data to buffer.
696: */
1.11 markus 697: buffer_append(&stdin_buffer, buf, len);
698: } else {
1.13 markus 699: /*
700: * Normal, successful read. But we have an escape character
701: * and have to process the characters one by one.
702: */
1.52 markus 703: if (process_escapes(&stdin_buffer, &stdout_buffer,
704: &stderr_buffer, buf, len) == -1)
1.31 markus 705: return;
1.11 markus 706: }
707: }
708: }
709:
1.20 markus 710: void
1.11 markus 711: client_process_output(fd_set * writeset)
712: {
713: int len;
714: char buf[100];
1.1 deraadt 715:
1.11 markus 716: /* Write buffered output to stdout. */
717: if (FD_ISSET(fileno(stdout), writeset)) {
718: /* Write as much data as possible. */
719: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 720: buffer_len(&stdout_buffer));
1.11 markus 721: if (len <= 0) {
722: if (errno == EAGAIN)
723: len = 0;
724: else {
1.13 markus 725: /*
726: * An error or EOF was encountered. Put an
727: * error message to stderr buffer.
728: */
1.11 markus 729: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
730: buffer_append(&stderr_buffer, buf, strlen(buf));
731: quit_pending = 1;
732: return;
733: }
734: }
735: /* Consume printed data from the buffer. */
736: buffer_consume(&stdout_buffer, len);
1.52 markus 737: stdout_bytes += len;
1.11 markus 738: }
739: /* Write buffered output to stderr. */
740: if (FD_ISSET(fileno(stderr), writeset)) {
741: /* Write as much data as possible. */
742: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 743: buffer_len(&stderr_buffer));
1.11 markus 744: if (len <= 0) {
745: if (errno == EAGAIN)
746: len = 0;
747: else {
1.13 markus 748: /* EOF or error, but can't even print error message. */
1.11 markus 749: quit_pending = 1;
750: return;
751: }
752: }
753: /* Consume printed characters from the buffer. */
754: buffer_consume(&stderr_buffer, len);
1.52 markus 755: stderr_bytes += len;
1.11 markus 756: }
1.1 deraadt 757: }
758:
1.13 markus 759: /*
1.15 markus 760: * Get packets from the connection input buffer, and process them as long as
761: * there are packets available.
762: *
763: * Any unknown packets received during the actual
764: * session cause the session to terminate. This is
765: * intended to make debugging easier since no
766: * confirmations are sent. Any compatible protocol
767: * extensions must be negotiated during the
768: * preparatory phase.
769: */
770:
1.20 markus 771: void
1.49 itojun 772: client_process_buffered_input_packets(void)
1.15 markus 773: {
1.54 ! markus 774: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 775: }
776:
1.31 markus 777: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 778:
779: int
1.31 markus 780: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 781: {
1.31 markus 782: /* XXX we assume c->extended is writeable */
783: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 784: }
785:
1.15 markus 786: /*
1.13 markus 787: * Implements the interactive session with the server. This is called after
788: * the user has been authenticated, and a command has been started on the
789: * remote host. If escape_char != -1, it is the character used as an escape
790: * character for terminating or suspending the session.
791: */
1.1 deraadt 792:
1.20 markus 793: int
1.30 markus 794: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 795: {
1.46 markus 796: fd_set *readset = NULL, *writeset = NULL;
797: int max_fd = 0;
1.11 markus 798: double start_time, total_time;
799: int len;
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:
1.16 markus 861: if (compat20 && !channel_still_open()) {
1.37 markus 862: debug2("!channel_still_open.");
1.16 markus 863: break;
864: }
865:
1.13 markus 866: /*
867: * Make packets of buffered stdin data, and buffer them for
868: * sending to the server.
869: */
1.17 markus 870: if (!compat20)
1.16 markus 871: client_make_packets_from_stdin_data();
1.11 markus 872:
1.13 markus 873: /*
1.46 markus 874: * Make packets from buffered channel data, and enqueue them
1.13 markus 875: * for sending to the server.
876: */
1.11 markus 877: if (packet_not_very_much_data_to_write())
878: channel_output_poll();
879:
1.13 markus 880: /*
881: * Check if the window size has changed, and buffer a message
882: * about it to the server if so.
883: */
1.11 markus 884: client_check_window_change();
885:
886: if (quit_pending)
887: break;
888:
1.13 markus 889: /*
890: * Wait until we have something to do (something becomes
891: * available on one of the descriptors).
892: */
1.46 markus 893: client_wait_until_can_do_something(&readset, &writeset, &max_fd);
1.11 markus 894:
895: if (quit_pending)
896: break;
897:
898: /* Do channel operations. */
1.46 markus 899: channel_after_select(readset, writeset);
1.11 markus 900:
1.17 markus 901: /* Buffer input from the connection. */
1.46 markus 902: client_process_net_input(readset);
1.17 markus 903:
904: if (quit_pending)
905: break;
1.11 markus 906:
1.17 markus 907: if (!compat20) {
908: /* Buffer data from stdin */
1.46 markus 909: client_process_input(readset);
1.17 markus 910: /*
911: * Process output to stdout and stderr. Output to
912: * the connection is processed elsewhere (above).
913: */
1.46 markus 914: client_process_output(writeset);
1.17 markus 915: }
1.11 markus 916:
1.13 markus 917: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 918: if (FD_ISSET(connection_out, writeset))
1.11 markus 919: packet_write_poll();
920: }
1.46 markus 921: if (readset)
922: xfree(readset);
923: if (writeset)
924: xfree(writeset);
1.11 markus 925:
926: /* Terminate the session. */
927:
928: /* Stop watching for window change. */
929: if (have_pty)
930: signal(SIGWINCH, SIG_DFL);
931:
932: /* Stop listening for connections. */
933: channel_stop_listening();
934:
1.13 markus 935: /*
936: * In interactive mode (with pseudo tty) display a message indicating
937: * that the connection has been closed.
938: */
1.11 markus 939: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
940: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
941: buffer_append(&stderr_buffer, buf, strlen(buf));
942: }
943: /* Output any buffered data for stdout. */
944: while (buffer_len(&stdout_buffer) > 0) {
945: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 946: buffer_len(&stdout_buffer));
1.11 markus 947: if (len <= 0) {
948: error("Write failed flushing stdout buffer.");
949: break;
950: }
951: buffer_consume(&stdout_buffer, len);
1.52 markus 952: stdout_bytes += len;
1.11 markus 953: }
954:
955: /* Output any buffered data for stderr. */
956: while (buffer_len(&stderr_buffer) > 0) {
957: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 958: buffer_len(&stderr_buffer));
1.11 markus 959: if (len <= 0) {
960: error("Write failed flushing stderr buffer.");
961: break;
962: }
963: buffer_consume(&stderr_buffer, len);
1.52 markus 964: stderr_bytes += len;
1.11 markus 965: }
966:
967: if (have_pty)
968: leave_raw_mode();
969:
970: /* Clear and free any buffers. */
971: memset(buf, 0, sizeof(buf));
972: buffer_free(&stdin_buffer);
973: buffer_free(&stdout_buffer);
974: buffer_free(&stderr_buffer);
975:
976: /* Report bytes transferred, and transfer rates. */
977: total_time = get_current_time() - start_time;
978: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
979: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
980: if (total_time > 0)
981: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
982: stdin_bytes / total_time, stdout_bytes / total_time,
983: stderr_bytes / total_time);
984:
985: /* Return the exit status of the program. */
986: debug("Exit status %d", exit_status);
987: return exit_status;
1.15 markus 988: }
989:
990: /*********/
991:
992: void
1.36 markus 993: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 994: {
1.42 markus 995: u_int data_len;
1.15 markus 996: char *data = packet_get_string(&data_len);
997: packet_integrity_check(plen, 4 + data_len, type);
998: buffer_append(&stdout_buffer, data, data_len);
999: memset(data, 0, data_len);
1000: xfree(data);
1001: }
1002: void
1.36 markus 1003: client_input_stderr_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(&stderr_buffer, data, data_len);
1009: memset(data, 0, data_len);
1010: xfree(data);
1011: }
1012: void
1.36 markus 1013: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1014: {
1015: packet_integrity_check(plen, 4, type);
1016: exit_status = packet_get_int();
1017: /* Acknowledge the exit. */
1018: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1019: packet_send();
1020: /*
1021: * Must wait for packet to be sent since we are
1022: * exiting the loop.
1023: */
1024: packet_write_wait();
1025: /* Flag that we want to exit. */
1026: quit_pending = 1;
1027: }
1028:
1.40 markus 1029: Channel *
1030: client_request_forwarded_tcpip(const char *request_type, int rchan)
1031: {
1032: Channel* c = NULL;
1033: char *listen_address, *originator_address;
1034: int listen_port, originator_port;
1035: int sock, newch;
1036:
1037: /* Get rest of the packet */
1038: listen_address = packet_get_string(NULL);
1039: listen_port = packet_get_int();
1040: originator_address = packet_get_string(NULL);
1041: originator_port = packet_get_int();
1042: packet_done();
1043:
1044: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1045: listen_address, listen_port, originator_address, originator_port);
1046:
1047: sock = channel_connect_by_listen_adress(listen_port);
1048: if (sock >= 0) {
1049: newch = channel_new("forwarded-tcpip",
1.41 markus 1050: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1051: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1052: xstrdup(originator_address), 1);
1053: c = channel_lookup(newch);
1054: }
1055: xfree(originator_address);
1056: xfree(listen_address);
1057: return c;
1058: }
1059:
1060: Channel*
1061: client_request_x11(const char *request_type, int rchan)
1062: {
1063: Channel *c = NULL;
1064: char *originator;
1065: int originator_port;
1066: int sock, newch;
1067:
1068: if (!options.forward_x11) {
1069: error("Warning: ssh server tried X11 forwarding.");
1070: error("Warning: this is probably a break in attempt by a malicious server.");
1071: return NULL;
1072: }
1073: originator = packet_get_string(NULL);
1074: if (datafellows & SSH_BUG_X11FWD) {
1075: debug2("buggy server: x11 request w/o originator_port");
1076: originator_port = 0;
1077: } else {
1078: originator_port = packet_get_int();
1079: }
1080: packet_done();
1081: /* XXX check permission */
1.47 markus 1082: debug("client_request_x11: request from %s %d", originator,
1083: originator_port);
1.40 markus 1084: sock = x11_connect_display();
1085: if (sock >= 0) {
1086: newch = channel_new("x11",
1087: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1088: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1089: xstrdup("x11"), 1);
1090: c = channel_lookup(newch);
1091: }
1092: xfree(originator);
1093: return c;
1094: }
1095:
1096: Channel*
1097: client_request_agent(const char *request_type, int rchan)
1098: {
1099: Channel *c = NULL;
1100: int sock, newch;
1101:
1102: if (!options.forward_agent) {
1103: error("Warning: ssh server tried agent forwarding.");
1104: error("Warning: this is probably a break in attempt by a malicious server.");
1105: return NULL;
1106: }
1107: sock = ssh_get_authentication_socket();
1108: if (sock >= 0) {
1109: newch = channel_new("authentication agent connection",
1110: SSH_CHANNEL_OPEN, sock, sock, -1,
1111: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1112: xstrdup("authentication agent connection"), 1);
1113: c = channel_lookup(newch);
1114: }
1115: return c;
1116: }
1117:
1.22 markus 1118: /* XXXX move to generic input handler */
1119: void
1.36 markus 1120: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1121: {
1122: Channel *c = NULL;
1123: char *ctype;
1.42 markus 1124: u_int len;
1.22 markus 1125: int rchan;
1126: int rmaxpack;
1127: int rwindow;
1128:
1129: ctype = packet_get_string(&len);
1130: rchan = packet_get_int();
1131: rwindow = packet_get_int();
1132: rmaxpack = packet_get_int();
1133:
1.24 markus 1134: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1135: ctype, rchan, rwindow, rmaxpack);
1136:
1.40 markus 1137: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1138: c = client_request_forwarded_tcpip(ctype, rchan);
1139: } else if (strcmp(ctype, "x11") == 0) {
1140: c = client_request_x11(ctype, rchan);
1141: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1142: c = client_request_agent(ctype, rchan);
1.22 markus 1143: }
1144: /* XXX duplicate : */
1145: if (c != NULL) {
1146: debug("confirm %s", ctype);
1147: c->remote_id = rchan;
1148: c->remote_window = rwindow;
1149: c->remote_maxpacket = rmaxpack;
1150:
1151: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1152: packet_put_int(c->remote_id);
1153: packet_put_int(c->self);
1154: packet_put_int(c->local_window);
1155: packet_put_int(c->local_maxpacket);
1156: packet_send();
1157: } else {
1158: debug("failure %s", ctype);
1159: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1160: packet_put_int(rchan);
1161: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1162: packet_put_cstring("bla bla");
1163: packet_put_cstring("");
1164: packet_send();
1165: }
1166: xfree(ctype);
1167: }
1.48 markus 1168: void
1169: client_input_channel_req(int type, int plen, void *ctxt)
1170: {
1171: Channel *c = NULL;
1172: int id, reply, success = 0;
1173: char *rtype;
1174:
1175: id = packet_get_int();
1176: rtype = packet_get_string(NULL);
1177: reply = packet_get_char();
1178:
1179: debug("client_input_channel_req: channel %d rtype %s reply %d",
1180: id, rtype, reply);
1181:
1182: if (session_ident == -1) {
1183: error("client_input_channel_req: no channel %d", session_ident);
1184: } else if (id != session_ident) {
1185: error("client_input_channel_req: channel %d: wrong channel: %d",
1186: session_ident, id);
1187: }
1188: c = channel_lookup(id);
1189: if (c == NULL) {
1190: error("client_input_channel_req: channel %d: unknown channel", id);
1191: } else if (strcmp(rtype, "exit-status") == 0) {
1192: success = 1;
1193: exit_status = packet_get_int();
1194: packet_done();
1195: }
1196: if (reply) {
1197: packet_start(success ?
1198: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1199: packet_put_int(c->remote_id);
1200: packet_send();
1201: }
1202: xfree(rtype);
1203: }
1.22 markus 1204:
1.20 markus 1205: void
1.49 itojun 1206: client_init_dispatch_20(void)
1.16 markus 1207: {
1.54 ! markus 1208: int i;
! 1209: /* dispatch_init(&dispatch_protocol_error); */
! 1210: for (i = 50; i <= 254; i++)
! 1211: dispatch_set(i, &dispatch_protocol_error);
1.16 markus 1212: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1213: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1214: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1215: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1216: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1217: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1218: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1219: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1220: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1221: }
1.20 markus 1222: void
1.49 itojun 1223: client_init_dispatch_13(void)
1.15 markus 1224: {
1225: dispatch_init(NULL);
1226: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1227: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1228: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1229: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1230: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1231: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1232: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1233: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1234: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1235:
1236: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1237: &auth_input_open_request : &deny_input_open);
1238: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1239: &x11_input_open : &deny_input_open);
1.15 markus 1240: }
1.20 markus 1241: void
1.49 itojun 1242: client_init_dispatch_15(void)
1.15 markus 1243: {
1244: client_init_dispatch_13();
1245: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1246: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1247: }
1.20 markus 1248: void
1.49 itojun 1249: client_init_dispatch(void)
1.15 markus 1250: {
1.16 markus 1251: if (compat20)
1252: client_init_dispatch_20();
1253: else if (compat13)
1.15 markus 1254: client_init_dispatch_13();
1255: else
1256: client_init_dispatch_15();
1.1 deraadt 1257: }
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