Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.63
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"
1.63 ! markus 62: RCSID("$OpenBSD: clientloop.c,v 1.62 2001/04/14 16:33:20 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"
71: #include "channels.h"
72: #include "dispatch.h"
1.30 markus 73: #include "buffer.h"
74: #include "bufaux.h"
1.40 markus 75: #include "key.h"
1.54 markus 76: #include "kex.h"
1.45 markus 77: #include "log.h"
78: #include "readconf.h"
79: #include "clientloop.h"
1.40 markus 80: #include "authfd.h"
1.45 markus 81: #include "atomicio.h"
1.62 stevesk 82: #include "sshtty.h"
1.63 ! markus 83: #include "misc.h"
1.39 markus 84:
85: /* import options */
86: extern Options options;
87:
1.1 deraadt 88: /* Flag indicating that stdin should be redirected from /dev/null. */
89: extern int stdin_null_flag;
90:
1.13 markus 91: /*
92: * Name of the host we are connecting to. This is the name given on the
93: * command line, or the HostName specified for the user-supplied name in a
94: * configuration file.
95: */
1.1 deraadt 96: extern char *host;
97:
1.13 markus 98: /*
99: * Flag to indicate that we have received a window change signal which has
100: * not yet been processed. This will cause a message indicating the new
101: * window size to be sent to the server a little later. This is volatile
102: * because this is updated in a signal handler.
103: */
1.1 deraadt 104: static volatile int received_window_change_signal = 0;
105:
106: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
107: static int in_non_blocking_mode = 0;
108:
109: /* Common data for the client loop code. */
1.31 markus 110: static int quit_pending; /* Set to non-zero to quit the client loop. */
111: static int escape_char; /* Escape character. */
1.11 markus 112: static int escape_pending; /* Last character was the escape character */
113: static int last_was_cr; /* Last character was a newline. */
114: static int exit_status; /* Used to store the exit status of the command. */
115: static int stdin_eof; /* EOF has been encountered on standard error. */
116: static Buffer stdin_buffer; /* Buffer for stdin data. */
117: static Buffer stdout_buffer; /* Buffer for stdout data. */
118: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 119: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
120: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 121: static int connection_in; /* Connection to server (input). */
122: static int connection_out; /* Connection to server (output). */
1.56 markus 123: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 124: static int session_closed = 0; /* In SSH2: login session closed. */
1.1 deraadt 125:
1.16 markus 126: void client_init_dispatch(void);
127: int session_ident = -1;
128:
1.54 markus 129: /*XXX*/
130: extern Kex *xxx_kex;
131:
1.1 deraadt 132: /* Restores stdin to blocking mode. */
133:
1.20 markus 134: void
1.49 itojun 135: leave_non_blocking(void)
1.1 deraadt 136: {
1.11 markus 137: if (in_non_blocking_mode) {
138: (void) fcntl(fileno(stdin), F_SETFL, 0);
139: in_non_blocking_mode = 0;
140: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
141: }
1.1 deraadt 142: }
143:
1.11 markus 144: /* Puts stdin terminal in non-blocking mode. */
145:
1.20 markus 146: void
1.49 itojun 147: enter_non_blocking(void)
1.1 deraadt 148: {
1.11 markus 149: in_non_blocking_mode = 1;
150: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
151: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 152: }
153:
1.13 markus 154: /*
155: * Signal handler for the window change signal (SIGWINCH). This just sets a
156: * flag indicating that the window has changed.
157: */
1.1 deraadt 158:
1.20 markus 159: void
1.11 markus 160: window_change_handler(int sig)
1.1 deraadt 161: {
1.11 markus 162: received_window_change_signal = 1;
163: signal(SIGWINCH, window_change_handler);
1.1 deraadt 164: }
165:
1.13 markus 166: /*
167: * Signal handler for signals that cause the program to terminate. These
168: * signals must be trapped to restore terminal modes.
169: */
1.1 deraadt 170:
1.20 markus 171: void
1.11 markus 172: signal_handler(int sig)
1.1 deraadt 173: {
1.62 stevesk 174: if (in_raw_mode())
1.11 markus 175: leave_raw_mode();
176: if (in_non_blocking_mode)
177: leave_non_blocking();
178: channel_stop_listening();
179: packet_close();
180: fatal("Killed by signal %d.", sig);
1.1 deraadt 181: }
182:
1.13 markus 183: /*
184: * Returns current time in seconds from Jan 1, 1970 with the maximum
185: * available resolution.
186: */
1.1 deraadt 187:
1.20 markus 188: double
1.49 itojun 189: get_current_time(void)
1.1 deraadt 190: {
1.11 markus 191: struct timeval tv;
192: gettimeofday(&tv, NULL);
193: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 194: }
195:
1.13 markus 196: /*
197: * This is called when the interactive is entered. This checks if there is
198: * an EOF coming on stdin. We must check this explicitly, as select() does
199: * not appear to wake up when redirecting from /dev/null.
200: */
1.1 deraadt 201:
1.20 markus 202: void
1.49 itojun 203: client_check_initial_eof_on_stdin(void)
1.1 deraadt 204: {
1.11 markus 205: int len;
206: char buf[1];
1.1 deraadt 207:
1.13 markus 208: /*
209: * If standard input is to be "redirected from /dev/null", we simply
210: * mark that we have seen an EOF and send an EOF message to the
211: * server. Otherwise, we try to read a single character; it appears
212: * that for some files, such /dev/null, select() never wakes up for
213: * read for this descriptor, which means that we never get EOF. This
214: * way we will get the EOF if stdin comes from /dev/null or similar.
215: */
1.11 markus 216: if (stdin_null_flag) {
217: /* Fake EOF on stdin. */
218: debug("Sending eof.");
219: stdin_eof = 1;
220: packet_start(SSH_CMSG_EOF);
221: packet_send();
222: } else {
223: enter_non_blocking();
224:
225: /* Check for immediate EOF on stdin. */
226: len = read(fileno(stdin), buf, 1);
227: if (len == 0) {
1.13 markus 228: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 229: debug("Sending eof.");
230: stdin_eof = 1;
231: packet_start(SSH_CMSG_EOF);
232: packet_send();
233: } else if (len > 0) {
1.13 markus 234: /*
235: * Got data. We must store the data in the buffer,
236: * and also process it as an escape character if
237: * appropriate.
238: */
1.42 markus 239: if ((u_char) buf[0] == escape_char)
1.11 markus 240: escape_pending = 1;
1.52 markus 241: else
1.11 markus 242: buffer_append(&stdin_buffer, buf, 1);
243: }
244: leave_non_blocking();
245: }
1.1 deraadt 246: }
247:
248:
1.13 markus 249: /*
250: * Make packets from buffered stdin data, and buffer them for sending to the
251: * connection.
252: */
1.1 deraadt 253:
1.20 markus 254: void
1.49 itojun 255: client_make_packets_from_stdin_data(void)
1.1 deraadt 256: {
1.42 markus 257: u_int len;
1.1 deraadt 258:
1.11 markus 259: /* Send buffered stdin data to the server. */
260: while (buffer_len(&stdin_buffer) > 0 &&
261: packet_not_very_much_data_to_write()) {
262: len = buffer_len(&stdin_buffer);
263: /* Keep the packets at reasonable size. */
264: if (len > packet_get_maxsize())
265: len = packet_get_maxsize();
266: packet_start(SSH_CMSG_STDIN_DATA);
267: packet_put_string(buffer_ptr(&stdin_buffer), len);
268: packet_send();
269: buffer_consume(&stdin_buffer, len);
1.52 markus 270: stdin_bytes += len;
1.11 markus 271: /* If we have a pending EOF, send it now. */
272: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
273: packet_start(SSH_CMSG_EOF);
274: packet_send();
275: }
1.1 deraadt 276: }
277: }
278:
1.13 markus 279: /*
280: * Checks if the client window has changed, and sends a packet about it to
281: * the server if so. The actual change is detected elsewhere (by a software
282: * interrupt on Unix); this just checks the flag and sends a message if
283: * appropriate.
284: */
1.1 deraadt 285:
1.20 markus 286: void
1.49 itojun 287: client_check_window_change(void)
1.1 deraadt 288: {
1.16 markus 289: struct winsize ws;
290:
291: if (! received_window_change_signal)
292: return;
293: /** XXX race */
294: received_window_change_signal = 0;
295:
296: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
297: return;
298:
1.37 markus 299: debug2("client_check_window_change: changed");
1.16 markus 300:
301: if (compat20) {
302: channel_request_start(session_ident, "window-change", 0);
303: packet_put_int(ws.ws_col);
304: packet_put_int(ws.ws_row);
305: packet_put_int(ws.ws_xpixel);
306: packet_put_int(ws.ws_ypixel);
307: packet_send();
308: } else {
309: packet_start(SSH_CMSG_WINDOW_SIZE);
310: packet_put_int(ws.ws_row);
311: packet_put_int(ws.ws_col);
312: packet_put_int(ws.ws_xpixel);
313: packet_put_int(ws.ws_ypixel);
314: packet_send();
1.1 deraadt 315: }
316: }
317:
1.13 markus 318: /*
319: * Waits until the client can do something (some data becomes available on
320: * one of the file descriptors).
321: */
1.1 deraadt 322:
1.20 markus 323: void
1.46 markus 324: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.56 markus 325: int *maxfdp, int rekeying)
1.11 markus 326: {
1.46 markus 327: /* Add any selections by the channel mechanism. */
1.56 markus 328: channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
1.11 markus 329:
1.16 markus 330: if (!compat20) {
1.17 markus 331: /* Read from the connection, unless our buffers are full. */
1.16 markus 332: if (buffer_len(&stdout_buffer) < buffer_high &&
333: buffer_len(&stderr_buffer) < buffer_high &&
334: channel_not_very_much_buffered_data())
1.46 markus 335: FD_SET(connection_in, *readsetp);
1.17 markus 336: /*
337: * Read from stdin, unless we have seen EOF or have very much
338: * buffered data to send to the server.
339: */
340: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 341: FD_SET(fileno(stdin), *readsetp);
1.17 markus 342:
343: /* Select stdout/stderr if have data in buffer. */
344: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 345: FD_SET(fileno(stdout), *writesetp);
1.17 markus 346: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 347: FD_SET(fileno(stderr), *writesetp);
1.16 markus 348: } else {
1.46 markus 349: FD_SET(connection_in, *readsetp);
1.16 markus 350: }
1.11 markus 351:
352: /* Select server connection if have data to write to the server. */
353: if (packet_have_data_to_write())
1.46 markus 354: FD_SET(connection_out, *writesetp);
1.11 markus 355:
1.13 markus 356: /*
357: * Wait for something to happen. This will suspend the process until
358: * some selected descriptor can be read, written, or has some other
359: * event pending. Note: if you want to implement SSH_MSG_IGNORE
360: * messages to fool traffic analysis, this might be the place to do
361: * it: just have a random timeout for the select, and send a random
362: * SSH_MSG_IGNORE packet when the timeout expires.
363: */
1.11 markus 364:
1.46 markus 365: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 366: char buf[100];
1.51 markus 367:
368: /*
369: * We have to clear the select masks, because we return.
370: * We have to return, because the mainloop checks for the flags
371: * set by the signal handlers.
372: */
373: memset(*readsetp, 0, *maxfdp);
374: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 375:
1.11 markus 376: if (errno == EINTR)
377: return;
378: /* Note: we might still have data in the buffers. */
379: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
380: buffer_append(&stderr_buffer, buf, strlen(buf));
381: quit_pending = 1;
382: }
383: }
384:
1.20 markus 385: void
1.31 markus 386: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 387: {
1.11 markus 388: struct winsize oldws, newws;
389:
390: /* Flush stdout and stderr buffers. */
1.31 markus 391: if (buffer_len(bout) > 0)
392: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
393: if (buffer_len(berr) > 0)
394: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 395:
396: leave_raw_mode();
397:
1.13 markus 398: /*
399: * Free (and clear) the buffer to reduce the amount of data that gets
400: * written to swap.
401: */
1.31 markus 402: buffer_free(bin);
403: buffer_free(bout);
404: buffer_free(berr);
1.11 markus 405:
406: /* Save old window size. */
407: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
408:
409: /* Send the suspend signal to the program itself. */
410: kill(getpid(), SIGTSTP);
411:
412: /* Check if the window size has changed. */
413: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
414: (oldws.ws_row != newws.ws_row ||
415: oldws.ws_col != newws.ws_col ||
416: oldws.ws_xpixel != newws.ws_xpixel ||
417: oldws.ws_ypixel != newws.ws_ypixel))
418: received_window_change_signal = 1;
419:
420: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 421: buffer_init(bin);
422: buffer_init(bout);
423: buffer_init(berr);
1.11 markus 424:
425: enter_raw_mode();
426: }
427:
1.20 markus 428: void
1.17 markus 429: client_process_net_input(fd_set * readset)
1.11 markus 430: {
1.17 markus 431: int len;
432: char buf[8192];
1.11 markus 433:
1.13 markus 434: /*
435: * Read input from the server, and add any such data to the buffer of
436: * the packet subsystem.
437: */
1.11 markus 438: if (FD_ISSET(connection_in, readset)) {
439: /* Read as much as possible. */
440: len = read(connection_in, buf, sizeof(buf));
441: if (len == 0) {
442: /* Received EOF. The remote host has closed the connection. */
443: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
444: host);
1.1 deraadt 445: buffer_append(&stderr_buffer, buf, strlen(buf));
446: quit_pending = 1;
447: return;
1.11 markus 448: }
1.13 markus 449: /*
450: * There is a kernel bug on Solaris that causes select to
451: * sometimes wake up even though there is no data available.
452: */
1.53 millert 453: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 454: len = 0;
455:
456: if (len < 0) {
457: /* An error has encountered. Perhaps there is a network problem. */
458: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
459: host, strerror(errno));
460: buffer_append(&stderr_buffer, buf, strlen(buf));
461: quit_pending = 1;
462: return;
463: }
464: packet_process_incoming(buf, len);
465: }
1.17 markus 466: }
1.16 markus 467:
1.31 markus 468: /* process the characters one by one */
469: int
470: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
471: {
1.32 markus 472: char string[1024];
1.31 markus 473: pid_t pid;
474: int bytes = 0;
1.42 markus 475: u_int i;
476: u_char ch;
1.31 markus 477: char *s;
478:
479: for (i = 0; i < len; i++) {
480: /* Get one character at a time. */
481: ch = buf[i];
482:
483: if (escape_pending) {
484: /* We have previously seen an escape character. */
485: /* Clear the flag now. */
486: escape_pending = 0;
487:
488: /* Process the escaped character. */
489: switch (ch) {
490: case '.':
491: /* Terminate the connection. */
1.32 markus 492: snprintf(string, sizeof string, "%c.\r\n", escape_char);
493: buffer_append(berr, string, strlen(string));
1.31 markus 494:
495: quit_pending = 1;
496: return -1;
497:
498: case 'Z' - 64:
499: /* Suspend the program. */
500: /* Print a message to that effect to the user. */
1.32 markus 501: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
502: buffer_append(berr, string, strlen(string));
1.31 markus 503:
504: /* Restore terminal modes and suspend. */
505: client_suspend_self(bin, bout, berr);
506:
507: /* We have been continued. */
508: continue;
509:
1.54 markus 510: case 'R':
1.59 markus 511: if (compat20) {
512: if (datafellows & SSH_BUG_NOREKEY)
513: log("Server does not support re-keying");
514: else
515: need_rekeying = 1;
516: }
1.54 markus 517: continue;
518:
1.31 markus 519: case '&':
520: /* XXX does not work yet with proto 2 */
521: if (compat20)
522: continue;
523: /*
524: * Detach the program (continue to serve connections,
525: * but put in background and no more new connections).
526: */
527: if (!stdin_eof) {
528: /*
529: * Sending SSH_CMSG_EOF alone does not always appear
530: * to be enough. So we try to send an EOF character
531: * first.
532: */
533: packet_start(SSH_CMSG_STDIN_DATA);
534: packet_put_string("\004", 1);
535: packet_send();
536: /* Close stdin. */
537: stdin_eof = 1;
538: if (buffer_len(bin) == 0) {
539: packet_start(SSH_CMSG_EOF);
540: packet_send();
541: }
542: }
543: /* Restore tty modes. */
544: leave_raw_mode();
545:
546: /* Stop listening for new connections. */
547: channel_stop_listening();
548:
549: printf("%c& [backgrounded]\n", escape_char);
550:
551: /* Fork into background. */
552: pid = fork();
553: if (pid < 0) {
554: error("fork: %.100s", strerror(errno));
555: continue;
556: }
557: if (pid != 0) { /* This is the parent. */
558: /* The parent just exits. */
559: exit(0);
560: }
561: /* The child continues serving connections. */
562: continue; /*XXX ? */
563:
564: case '?':
1.32 markus 565: snprintf(string, sizeof string,
1.31 markus 566: "%c?\r\n\
567: Supported escape sequences:\r\n\
568: ~. - terminate connection\r\n\
569: ~^Z - suspend ssh\r\n\
570: ~# - list forwarded connections\r\n\
571: ~& - background ssh (when waiting for connections to terminate)\r\n\
572: ~? - this message\r\n\
573: ~~ - send the escape character by typing it twice\r\n\
574: (Note that escapes are only recognized immediately after newline.)\r\n",
575: escape_char);
1.32 markus 576: buffer_append(berr, string, strlen(string));
1.31 markus 577: continue;
578:
579: case '#':
1.32 markus 580: snprintf(string, sizeof string, "%c#\r\n", escape_char);
581: buffer_append(berr, string, strlen(string));
1.31 markus 582: s = channel_open_message();
583: buffer_append(berr, s, strlen(s));
584: xfree(s);
585: continue;
586:
587: default:
588: if (ch != escape_char) {
589: buffer_put_char(bin, escape_char);
590: bytes++;
591: }
592: /* Escaped characters fall through here */
593: break;
594: }
595: } else {
596: /*
597: * The previous character was not an escape char. Check if this
598: * is an escape.
599: */
600: if (last_was_cr && ch == escape_char) {
601: /* It is. Set the flag and continue to next character. */
602: escape_pending = 1;
603: continue;
604: }
605: }
606:
607: /*
608: * Normal character. Record whether it was a newline,
609: * and append it to the buffer.
610: */
611: last_was_cr = (ch == '\r' || ch == '\n');
612: buffer_put_char(bin, ch);
613: bytes++;
614: }
615: return bytes;
616: }
617:
1.20 markus 618: void
1.17 markus 619: client_process_input(fd_set * readset)
620: {
1.21 deraadt 621: int len;
1.31 markus 622: char buf[8192];
1.16 markus 623:
1.11 markus 624: /* Read input from stdin. */
625: if (FD_ISSET(fileno(stdin), readset)) {
626: /* Read as much as possible. */
627: len = read(fileno(stdin), buf, sizeof(buf));
628: if (len <= 0) {
1.13 markus 629: /*
630: * Received EOF or error. They are treated
631: * similarly, except that an error message is printed
632: * if it was an error condition.
633: */
1.11 markus 634: if (len < 0) {
635: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
636: buffer_append(&stderr_buffer, buf, strlen(buf));
637: }
638: /* Mark that we have seen EOF. */
639: stdin_eof = 1;
1.13 markus 640: /*
641: * Send an EOF message to the server unless there is
642: * data in the buffer. If there is data in the
643: * buffer, no message will be sent now. Code
644: * elsewhere will send the EOF when the buffer
645: * becomes empty if stdin_eof is set.
646: */
1.11 markus 647: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 648: packet_start(SSH_CMSG_EOF);
649: packet_send();
1.11 markus 650: }
651: } else if (escape_char == -1) {
1.13 markus 652: /*
653: * Normal successful read, and no escape character.
654: * Just append the data to buffer.
655: */
1.11 markus 656: buffer_append(&stdin_buffer, buf, len);
657: } else {
1.13 markus 658: /*
659: * Normal, successful read. But we have an escape character
660: * and have to process the characters one by one.
661: */
1.52 markus 662: if (process_escapes(&stdin_buffer, &stdout_buffer,
663: &stderr_buffer, buf, len) == -1)
1.31 markus 664: return;
1.11 markus 665: }
666: }
667: }
668:
1.20 markus 669: void
1.11 markus 670: client_process_output(fd_set * writeset)
671: {
672: int len;
673: char buf[100];
1.1 deraadt 674:
1.11 markus 675: /* Write buffered output to stdout. */
676: if (FD_ISSET(fileno(stdout), writeset)) {
677: /* Write as much data as possible. */
678: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 679: buffer_len(&stdout_buffer));
1.11 markus 680: if (len <= 0) {
681: if (errno == EAGAIN)
682: len = 0;
683: else {
1.13 markus 684: /*
685: * An error or EOF was encountered. Put an
686: * error message to stderr buffer.
687: */
1.11 markus 688: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
689: buffer_append(&stderr_buffer, buf, strlen(buf));
690: quit_pending = 1;
691: return;
692: }
693: }
694: /* Consume printed data from the buffer. */
695: buffer_consume(&stdout_buffer, len);
1.57 markus 696: stdout_bytes += len;
1.11 markus 697: }
698: /* Write buffered output to stderr. */
699: if (FD_ISSET(fileno(stderr), writeset)) {
700: /* Write as much data as possible. */
701: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 702: buffer_len(&stderr_buffer));
1.11 markus 703: if (len <= 0) {
704: if (errno == EAGAIN)
705: len = 0;
706: else {
1.13 markus 707: /* EOF or error, but can't even print error message. */
1.11 markus 708: quit_pending = 1;
709: return;
710: }
711: }
712: /* Consume printed characters from the buffer. */
713: buffer_consume(&stderr_buffer, len);
1.57 markus 714: stderr_bytes += len;
1.11 markus 715: }
1.1 deraadt 716: }
717:
1.13 markus 718: /*
1.15 markus 719: * Get packets from the connection input buffer, and process them as long as
720: * there are packets available.
721: *
722: * Any unknown packets received during the actual
723: * session cause the session to terminate. This is
724: * intended to make debugging easier since no
725: * confirmations are sent. Any compatible protocol
726: * extensions must be negotiated during the
727: * preparatory phase.
728: */
729:
1.20 markus 730: void
1.49 itojun 731: client_process_buffered_input_packets(void)
1.15 markus 732: {
1.54 markus 733: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 734: }
735:
1.31 markus 736: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 737:
738: int
1.31 markus 739: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 740: {
1.31 markus 741: /* XXX we assume c->extended is writeable */
742: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 743: }
744:
1.60 markus 745: void
746: client_channel_closed(int id, void *arg)
747: {
748: if (id != session_ident)
749: error("client_channel_closed: id %d != session_ident %d",
750: id, session_ident);
751: session_closed = 1;
1.62 stevesk 752: if (in_raw_mode())
1.61 markus 753: leave_raw_mode();
1.60 markus 754: }
755:
1.15 markus 756: /*
1.13 markus 757: * Implements the interactive session with the server. This is called after
758: * the user has been authenticated, and a command has been started on the
759: * remote host. If escape_char != -1, it is the character used as an escape
760: * character for terminating or suspending the session.
761: */
1.1 deraadt 762:
1.20 markus 763: int
1.30 markus 764: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 765: {
1.46 markus 766: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 767: double start_time, total_time;
1.56 markus 768: int max_fd = 0, len, rekeying = 0;
1.11 markus 769: char buf[100];
770:
771: debug("Entering interactive session.");
772:
773: start_time = get_current_time();
774:
775: /* Initialize variables. */
776: escape_pending = 0;
777: last_was_cr = 1;
778: exit_status = -1;
779: stdin_eof = 0;
780: buffer_high = 64 * 1024;
781: connection_in = packet_get_connection_in();
782: connection_out = packet_get_connection_out();
1.46 markus 783: max_fd = MAX(connection_in, connection_out);
784:
785: if (!compat20) {
1.63 ! markus 786: /* enable nonblocking unless tty */
! 787: if (!isatty(fileno(stdin)))
! 788: set_nonblock(fileno(stdin));
! 789: if (!isatty(fileno(stdout)))
! 790: set_nonblock(fileno(stdout));
! 791: if (!isatty(fileno(stderr)))
! 792: set_nonblock(fileno(stderr));
1.46 markus 793: max_fd = MAX(max_fd, fileno(stdin));
794: max_fd = MAX(max_fd, fileno(stdout));
795: max_fd = MAX(max_fd, fileno(stderr));
796: }
1.11 markus 797: stdin_bytes = 0;
798: stdout_bytes = 0;
799: stderr_bytes = 0;
800: quit_pending = 0;
801: escape_char = escape_char_arg;
802:
803: /* Initialize buffers. */
804: buffer_init(&stdin_buffer);
805: buffer_init(&stdout_buffer);
806: buffer_init(&stderr_buffer);
807:
1.15 markus 808: client_init_dispatch();
809:
1.11 markus 810: /* Set signal handlers to restore non-blocking mode. */
811: signal(SIGINT, signal_handler);
812: signal(SIGQUIT, signal_handler);
813: signal(SIGTERM, signal_handler);
814: signal(SIGPIPE, SIG_IGN);
815: if (have_pty)
816: signal(SIGWINCH, window_change_handler);
817:
818: if (have_pty)
819: enter_raw_mode();
820:
1.48 markus 821: if (compat20) {
822: session_ident = ssh2_chan_id;
823: if (escape_char != -1)
824: channel_register_filter(session_ident,
825: simple_escape_filter);
1.60 markus 826: if (session_ident != -1)
827: channel_register_cleanup(session_ident,
828: client_channel_closed);
1.48 markus 829: } else {
830: /* Check if we should immediately send eof on stdin. */
1.16 markus 831: client_check_initial_eof_on_stdin();
1.48 markus 832: }
1.30 markus 833:
1.11 markus 834: /* Main loop of the client for the interactive session mode. */
835: while (!quit_pending) {
836:
1.13 markus 837: /* Process buffered packets sent by the server. */
1.11 markus 838: client_process_buffered_input_packets();
839:
1.60 markus 840: if (compat20 && session_closed && !channel_still_open())
841: break;
842:
1.56 markus 843: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 844:
1.56 markus 845: if (rekeying) {
846: debug("rekeying in progress");
847: } else {
848: /*
849: * Make packets of buffered stdin data, and buffer
850: * them for sending to the server.
851: */
852: if (!compat20)
853: client_make_packets_from_stdin_data();
1.11 markus 854:
1.56 markus 855: /*
856: * Make packets from buffered channel data, and
857: * enqueue them for sending to the server.
858: */
859: if (packet_not_very_much_data_to_write())
860: channel_output_poll();
1.11 markus 861:
1.56 markus 862: /*
863: * Check if the window size has changed, and buffer a
864: * message about it to the server if so.
865: */
866: client_check_window_change();
1.11 markus 867:
1.56 markus 868: if (quit_pending)
869: break;
870: }
1.13 markus 871: /*
872: * Wait until we have something to do (something becomes
873: * available on one of the descriptors).
874: */
1.56 markus 875: client_wait_until_can_do_something(&readset, &writeset,
876: &max_fd, rekeying);
1.11 markus 877:
878: if (quit_pending)
879: break;
880:
1.56 markus 881: /* Do channel operations unless rekeying in progress. */
882: if (!rekeying) {
883: channel_after_select(readset, writeset);
884:
885: if (need_rekeying) {
886: debug("user requests rekeying");
887: xxx_kex->done = 0;
888: kex_send_kexinit(xxx_kex);
889: need_rekeying = 0;
890: }
891: }
1.11 markus 892:
1.17 markus 893: /* Buffer input from the connection. */
1.46 markus 894: client_process_net_input(readset);
1.17 markus 895:
896: if (quit_pending)
897: break;
1.11 markus 898:
1.17 markus 899: if (!compat20) {
900: /* Buffer data from stdin */
1.46 markus 901: client_process_input(readset);
1.17 markus 902: /*
903: * Process output to stdout and stderr. Output to
904: * the connection is processed elsewhere (above).
905: */
1.46 markus 906: client_process_output(writeset);
1.17 markus 907: }
1.11 markus 908:
1.13 markus 909: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 910: if (FD_ISSET(connection_out, writeset))
1.11 markus 911: packet_write_poll();
912: }
1.46 markus 913: if (readset)
914: xfree(readset);
915: if (writeset)
916: xfree(writeset);
1.11 markus 917:
918: /* Terminate the session. */
919:
920: /* Stop watching for window change. */
921: if (have_pty)
922: signal(SIGWINCH, SIG_DFL);
923:
924: /* Stop listening for connections. */
925: channel_stop_listening();
926:
1.13 markus 927: /*
928: * In interactive mode (with pseudo tty) display a message indicating
929: * that the connection has been closed.
930: */
1.11 markus 931: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
932: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
933: buffer_append(&stderr_buffer, buf, strlen(buf));
934: }
935: /* Output any buffered data for stdout. */
936: while (buffer_len(&stdout_buffer) > 0) {
937: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 938: buffer_len(&stdout_buffer));
1.11 markus 939: if (len <= 0) {
940: error("Write failed flushing stdout buffer.");
941: break;
942: }
943: buffer_consume(&stdout_buffer, len);
1.57 markus 944: stdout_bytes += len;
1.11 markus 945: }
946:
947: /* Output any buffered data for stderr. */
948: while (buffer_len(&stderr_buffer) > 0) {
949: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 950: buffer_len(&stderr_buffer));
1.11 markus 951: if (len <= 0) {
952: error("Write failed flushing stderr buffer.");
953: break;
954: }
955: buffer_consume(&stderr_buffer, len);
1.57 markus 956: stderr_bytes += len;
1.11 markus 957: }
958:
959: if (have_pty)
960: leave_raw_mode();
961:
962: /* Clear and free any buffers. */
963: memset(buf, 0, sizeof(buf));
964: buffer_free(&stdin_buffer);
965: buffer_free(&stdout_buffer);
966: buffer_free(&stderr_buffer);
967:
968: /* Report bytes transferred, and transfer rates. */
969: total_time = get_current_time() - start_time;
970: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
971: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
972: if (total_time > 0)
973: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
974: stdin_bytes / total_time, stdout_bytes / total_time,
975: stderr_bytes / total_time);
976:
977: /* Return the exit status of the program. */
978: debug("Exit status %d", exit_status);
979: return exit_status;
1.15 markus 980: }
981:
982: /*********/
983:
984: void
1.36 markus 985: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 986: {
1.42 markus 987: u_int data_len;
1.15 markus 988: char *data = packet_get_string(&data_len);
989: packet_integrity_check(plen, 4 + data_len, type);
990: buffer_append(&stdout_buffer, data, data_len);
991: memset(data, 0, data_len);
992: xfree(data);
993: }
994: void
1.36 markus 995: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 996: {
1.42 markus 997: u_int data_len;
1.15 markus 998: char *data = packet_get_string(&data_len);
999: packet_integrity_check(plen, 4 + data_len, type);
1000: buffer_append(&stderr_buffer, data, data_len);
1001: memset(data, 0, data_len);
1002: xfree(data);
1003: }
1004: void
1.36 markus 1005: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1006: {
1007: packet_integrity_check(plen, 4, type);
1008: exit_status = packet_get_int();
1009: /* Acknowledge the exit. */
1010: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1011: packet_send();
1012: /*
1013: * Must wait for packet to be sent since we are
1014: * exiting the loop.
1015: */
1016: packet_write_wait();
1017: /* Flag that we want to exit. */
1018: quit_pending = 1;
1019: }
1020:
1.40 markus 1021: Channel *
1022: client_request_forwarded_tcpip(const char *request_type, int rchan)
1023: {
1024: Channel* c = NULL;
1025: char *listen_address, *originator_address;
1026: int listen_port, originator_port;
1027: int sock, newch;
1028:
1029: /* Get rest of the packet */
1030: listen_address = packet_get_string(NULL);
1031: listen_port = packet_get_int();
1032: originator_address = packet_get_string(NULL);
1033: originator_port = packet_get_int();
1034: packet_done();
1035:
1036: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1037: listen_address, listen_port, originator_address, originator_port);
1038:
1039: sock = channel_connect_by_listen_adress(listen_port);
1040: if (sock >= 0) {
1041: newch = channel_new("forwarded-tcpip",
1.41 markus 1042: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1043: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1044: xstrdup(originator_address), 1);
1045: c = channel_lookup(newch);
1046: }
1047: xfree(originator_address);
1048: xfree(listen_address);
1049: return c;
1050: }
1051:
1052: Channel*
1053: client_request_x11(const char *request_type, int rchan)
1054: {
1055: Channel *c = NULL;
1056: char *originator;
1057: int originator_port;
1058: int sock, newch;
1059:
1060: if (!options.forward_x11) {
1061: error("Warning: ssh server tried X11 forwarding.");
1062: error("Warning: this is probably a break in attempt by a malicious server.");
1063: return NULL;
1064: }
1065: originator = packet_get_string(NULL);
1066: if (datafellows & SSH_BUG_X11FWD) {
1067: debug2("buggy server: x11 request w/o originator_port");
1068: originator_port = 0;
1069: } else {
1070: originator_port = packet_get_int();
1071: }
1072: packet_done();
1073: /* XXX check permission */
1.47 markus 1074: debug("client_request_x11: request from %s %d", originator,
1075: originator_port);
1.40 markus 1076: sock = x11_connect_display();
1077: if (sock >= 0) {
1078: newch = channel_new("x11",
1079: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1080: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1081: xstrdup("x11"), 1);
1082: c = channel_lookup(newch);
1083: }
1084: xfree(originator);
1085: return c;
1086: }
1087:
1088: Channel*
1089: client_request_agent(const char *request_type, int rchan)
1090: {
1091: Channel *c = NULL;
1092: int sock, newch;
1093:
1094: if (!options.forward_agent) {
1095: error("Warning: ssh server tried agent forwarding.");
1096: error("Warning: this is probably a break in attempt by a malicious server.");
1097: return NULL;
1098: }
1099: sock = ssh_get_authentication_socket();
1100: if (sock >= 0) {
1101: newch = channel_new("authentication agent connection",
1102: SSH_CHANNEL_OPEN, sock, sock, -1,
1103: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1104: xstrdup("authentication agent connection"), 1);
1105: c = channel_lookup(newch);
1106: }
1107: return c;
1108: }
1109:
1.22 markus 1110: /* XXXX move to generic input handler */
1111: void
1.36 markus 1112: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1113: {
1114: Channel *c = NULL;
1115: char *ctype;
1.42 markus 1116: u_int len;
1.22 markus 1117: int rchan;
1118: int rmaxpack;
1119: int rwindow;
1120:
1121: ctype = packet_get_string(&len);
1122: rchan = packet_get_int();
1123: rwindow = packet_get_int();
1124: rmaxpack = packet_get_int();
1125:
1.24 markus 1126: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1127: ctype, rchan, rwindow, rmaxpack);
1128:
1.40 markus 1129: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1130: c = client_request_forwarded_tcpip(ctype, rchan);
1131: } else if (strcmp(ctype, "x11") == 0) {
1132: c = client_request_x11(ctype, rchan);
1133: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1134: c = client_request_agent(ctype, rchan);
1.22 markus 1135: }
1136: /* XXX duplicate : */
1137: if (c != NULL) {
1138: debug("confirm %s", ctype);
1139: c->remote_id = rchan;
1140: c->remote_window = rwindow;
1141: c->remote_maxpacket = rmaxpack;
1142:
1143: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1144: packet_put_int(c->remote_id);
1145: packet_put_int(c->self);
1146: packet_put_int(c->local_window);
1147: packet_put_int(c->local_maxpacket);
1148: packet_send();
1149: } else {
1150: debug("failure %s", ctype);
1151: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1152: packet_put_int(rchan);
1153: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1154: packet_put_cstring("bla bla");
1155: packet_put_cstring("");
1156: packet_send();
1157: }
1158: xfree(ctype);
1159: }
1.48 markus 1160: void
1161: client_input_channel_req(int type, int plen, void *ctxt)
1162: {
1163: Channel *c = NULL;
1164: int id, reply, success = 0;
1165: char *rtype;
1166:
1167: id = packet_get_int();
1168: rtype = packet_get_string(NULL);
1169: reply = packet_get_char();
1170:
1171: debug("client_input_channel_req: channel %d rtype %s reply %d",
1172: id, rtype, reply);
1173:
1174: if (session_ident == -1) {
1175: error("client_input_channel_req: no channel %d", session_ident);
1176: } else if (id != session_ident) {
1177: error("client_input_channel_req: channel %d: wrong channel: %d",
1178: session_ident, id);
1179: }
1180: c = channel_lookup(id);
1181: if (c == NULL) {
1182: error("client_input_channel_req: channel %d: unknown channel", id);
1183: } else if (strcmp(rtype, "exit-status") == 0) {
1184: success = 1;
1185: exit_status = packet_get_int();
1186: packet_done();
1187: }
1188: if (reply) {
1189: packet_start(success ?
1190: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1191: packet_put_int(c->remote_id);
1192: packet_send();
1193: }
1194: xfree(rtype);
1195: }
1.22 markus 1196:
1.20 markus 1197: void
1.49 itojun 1198: client_init_dispatch_20(void)
1.16 markus 1199: {
1.55 markus 1200: dispatch_init(&dispatch_protocol_error);
1.16 markus 1201: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1202: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1203: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1204: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1205: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1206: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1207: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1208: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1209: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1210:
1211: /* rekeying */
1212: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1213: }
1.20 markus 1214: void
1.49 itojun 1215: client_init_dispatch_13(void)
1.15 markus 1216: {
1217: dispatch_init(NULL);
1218: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1219: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1220: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1221: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1222: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1223: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1224: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1225: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1226: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1227:
1228: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1229: &auth_input_open_request : &deny_input_open);
1230: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1231: &x11_input_open : &deny_input_open);
1.15 markus 1232: }
1.20 markus 1233: void
1.49 itojun 1234: client_init_dispatch_15(void)
1.15 markus 1235: {
1236: client_init_dispatch_13();
1237: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1238: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1239: }
1.20 markus 1240: void
1.49 itojun 1241: client_init_dispatch(void)
1.15 markus 1242: {
1.16 markus 1243: if (compat20)
1244: client_init_dispatch_20();
1245: else if (compat13)
1.15 markus 1246: client_init_dispatch_13();
1247: else
1248: client_init_dispatch_15();
1.1 deraadt 1249: }
![[BACK]](/icons/back.gif){kind=icon}
Return to clientloop.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh