Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.50
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"
1.50 ! deraadt 62: RCSID("$OpenBSD: clientloop.c,v 1.49 2001/02/08 19:30:51 itojun 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"
1.45 markus 76: #include "log.h"
77: #include "readconf.h"
78: #include "clientloop.h"
1.40 markus 79: #include "authfd.h"
1.45 markus 80: #include "atomicio.h"
1.39 markus 81:
82: /* import options */
83: extern Options options;
84:
1.1 deraadt 85: /* Flag indicating that stdin should be redirected from /dev/null. */
86: extern int stdin_null_flag;
87:
1.13 markus 88: /*
89: * Name of the host we are connecting to. This is the name given on the
90: * command line, or the HostName specified for the user-supplied name in a
91: * configuration file.
92: */
1.1 deraadt 93: extern char *host;
94:
1.13 markus 95: /*
96: * Flag to indicate that we have received a window change signal which has
97: * not yet been processed. This will cause a message indicating the new
98: * window size to be sent to the server a little later. This is volatile
99: * because this is updated in a signal handler.
100: */
1.1 deraadt 101: static volatile int received_window_change_signal = 0;
102:
103: /* Terminal modes, as saved by enter_raw_mode. */
104: static struct termios saved_tio;
105:
1.13 markus 106: /*
107: * Flag indicating whether we are in raw mode. This is used by
108: * enter_raw_mode and leave_raw_mode.
109: */
1.1 deraadt 110: static int in_raw_mode = 0;
111:
112: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
113: static int in_non_blocking_mode = 0;
114:
115: /* Common data for the client loop code. */
1.31 markus 116: static int quit_pending; /* Set to non-zero to quit the client loop. */
117: static int escape_char; /* Escape character. */
1.11 markus 118: static int escape_pending; /* Last character was the escape character */
119: static int last_was_cr; /* Last character was a newline. */
120: static int exit_status; /* Used to store the exit status of the command. */
121: static int stdin_eof; /* EOF has been encountered on standard error. */
122: static Buffer stdin_buffer; /* Buffer for stdin data. */
123: static Buffer stdout_buffer; /* Buffer for stdout data. */
124: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 125: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
126: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 127: static int connection_in; /* Connection to server (input). */
128: static int connection_out; /* Connection to server (output). */
1.1 deraadt 129:
1.16 markus 130: void client_init_dispatch(void);
131: int session_ident = -1;
132:
1.13 markus 133: /* Returns the user\'s terminal to normal mode if it had been put in raw mode. */
1.1 deraadt 134:
1.20 markus 135: void
1.49 itojun 136: leave_raw_mode(void)
1.1 deraadt 137: {
1.11 markus 138: if (!in_raw_mode)
139: return;
140: in_raw_mode = 0;
141: if (tcsetattr(fileno(stdin), TCSADRAIN, &saved_tio) < 0)
142: perror("tcsetattr");
1.1 deraadt 143:
1.11 markus 144: fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
1.1 deraadt 145: }
146:
147: /* Puts the user\'s terminal in raw mode. */
148:
1.20 markus 149: void
1.49 itojun 150: enter_raw_mode(void)
1.1 deraadt 151: {
1.11 markus 152: struct termios tio;
1.1 deraadt 153:
1.11 markus 154: if (tcgetattr(fileno(stdin), &tio) < 0)
155: perror("tcgetattr");
156: saved_tio = tio;
157: tio.c_iflag |= IGNPAR;
158: tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
159: tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
1.1 deraadt 160: #ifdef IEXTEN
1.11 markus 161: tio.c_lflag &= ~IEXTEN;
162: #endif /* IEXTEN */
163: tio.c_oflag &= ~OPOST;
164: tio.c_cc[VMIN] = 1;
165: tio.c_cc[VTIME] = 0;
166: if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) < 0)
167: perror("tcsetattr");
168: in_raw_mode = 1;
1.1 deraadt 169:
1.11 markus 170: fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
171: }
1.1 deraadt 172:
173: /* Restores stdin to blocking mode. */
174:
1.20 markus 175: void
1.49 itojun 176: leave_non_blocking(void)
1.1 deraadt 177: {
1.11 markus 178: if (in_non_blocking_mode) {
179: (void) fcntl(fileno(stdin), F_SETFL, 0);
180: in_non_blocking_mode = 0;
181: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
182: }
1.1 deraadt 183: }
184:
1.11 markus 185: /* Puts stdin terminal in non-blocking mode. */
186:
1.20 markus 187: void
1.49 itojun 188: enter_non_blocking(void)
1.1 deraadt 189: {
1.11 markus 190: in_non_blocking_mode = 1;
191: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
192: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 193: }
194:
1.13 markus 195: /*
196: * Signal handler for the window change signal (SIGWINCH). This just sets a
197: * flag indicating that the window has changed.
198: */
1.1 deraadt 199:
1.20 markus 200: void
1.11 markus 201: window_change_handler(int sig)
1.1 deraadt 202: {
1.11 markus 203: received_window_change_signal = 1;
204: signal(SIGWINCH, window_change_handler);
1.1 deraadt 205: }
206:
1.13 markus 207: /*
208: * Signal handler for signals that cause the program to terminate. These
209: * signals must be trapped to restore terminal modes.
210: */
1.1 deraadt 211:
1.20 markus 212: void
1.11 markus 213: signal_handler(int sig)
1.1 deraadt 214: {
1.11 markus 215: if (in_raw_mode)
216: leave_raw_mode();
217: if (in_non_blocking_mode)
218: leave_non_blocking();
219: channel_stop_listening();
220: packet_close();
221: fatal("Killed by signal %d.", sig);
1.1 deraadt 222: }
223:
1.13 markus 224: /*
225: * Returns current time in seconds from Jan 1, 1970 with the maximum
226: * available resolution.
227: */
1.1 deraadt 228:
1.20 markus 229: double
1.49 itojun 230: get_current_time(void)
1.1 deraadt 231: {
1.11 markus 232: struct timeval tv;
233: gettimeofday(&tv, NULL);
234: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 235: }
236:
1.13 markus 237: /*
238: * This is called when the interactive is entered. This checks if there is
239: * an EOF coming on stdin. We must check this explicitly, as select() does
240: * not appear to wake up when redirecting from /dev/null.
241: */
1.1 deraadt 242:
1.20 markus 243: void
1.49 itojun 244: client_check_initial_eof_on_stdin(void)
1.1 deraadt 245: {
1.11 markus 246: int len;
247: char buf[1];
1.1 deraadt 248:
1.13 markus 249: /*
250: * If standard input is to be "redirected from /dev/null", we simply
251: * mark that we have seen an EOF and send an EOF message to the
252: * server. Otherwise, we try to read a single character; it appears
253: * that for some files, such /dev/null, select() never wakes up for
254: * read for this descriptor, which means that we never get EOF. This
255: * way we will get the EOF if stdin comes from /dev/null or similar.
256: */
1.11 markus 257: if (stdin_null_flag) {
258: /* Fake EOF on stdin. */
259: debug("Sending eof.");
260: stdin_eof = 1;
261: packet_start(SSH_CMSG_EOF);
262: packet_send();
263: } else {
264: enter_non_blocking();
265:
266: /* Check for immediate EOF on stdin. */
267: len = read(fileno(stdin), buf, 1);
268: if (len == 0) {
1.13 markus 269: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 270: debug("Sending eof.");
271: stdin_eof = 1;
272: packet_start(SSH_CMSG_EOF);
273: packet_send();
274: } else if (len > 0) {
1.13 markus 275: /*
276: * Got data. We must store the data in the buffer,
277: * and also process it as an escape character if
278: * appropriate.
279: */
1.42 markus 280: if ((u_char) buf[0] == escape_char)
1.11 markus 281: escape_pending = 1;
282: else {
283: buffer_append(&stdin_buffer, buf, 1);
284: stdin_bytes += 1;
285: }
286: }
287: leave_non_blocking();
288: }
1.1 deraadt 289: }
290:
291:
1.13 markus 292: /*
293: * Make packets from buffered stdin data, and buffer them for sending to the
294: * connection.
295: */
1.1 deraadt 296:
1.20 markus 297: void
1.49 itojun 298: client_make_packets_from_stdin_data(void)
1.1 deraadt 299: {
1.42 markus 300: u_int len;
1.1 deraadt 301:
1.11 markus 302: /* Send buffered stdin data to the server. */
303: while (buffer_len(&stdin_buffer) > 0 &&
304: packet_not_very_much_data_to_write()) {
305: len = buffer_len(&stdin_buffer);
306: /* Keep the packets at reasonable size. */
307: if (len > packet_get_maxsize())
308: len = packet_get_maxsize();
309: packet_start(SSH_CMSG_STDIN_DATA);
310: packet_put_string(buffer_ptr(&stdin_buffer), len);
311: packet_send();
312: buffer_consume(&stdin_buffer, len);
313: /* If we have a pending EOF, send it now. */
314: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
315: packet_start(SSH_CMSG_EOF);
316: packet_send();
317: }
1.1 deraadt 318: }
319: }
320:
1.13 markus 321: /*
322: * Checks if the client window has changed, and sends a packet about it to
323: * the server if so. The actual change is detected elsewhere (by a software
324: * interrupt on Unix); this just checks the flag and sends a message if
325: * appropriate.
326: */
1.1 deraadt 327:
1.20 markus 328: void
1.49 itojun 329: client_check_window_change(void)
1.1 deraadt 330: {
1.16 markus 331: struct winsize ws;
332:
333: if (! received_window_change_signal)
334: return;
335: /** XXX race */
336: received_window_change_signal = 0;
337:
338: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
339: return;
340:
1.37 markus 341: debug2("client_check_window_change: changed");
1.16 markus 342:
343: if (compat20) {
344: channel_request_start(session_ident, "window-change", 0);
345: packet_put_int(ws.ws_col);
346: packet_put_int(ws.ws_row);
347: packet_put_int(ws.ws_xpixel);
348: packet_put_int(ws.ws_ypixel);
349: packet_send();
350: } else {
351: packet_start(SSH_CMSG_WINDOW_SIZE);
352: packet_put_int(ws.ws_row);
353: packet_put_int(ws.ws_col);
354: packet_put_int(ws.ws_xpixel);
355: packet_put_int(ws.ws_ypixel);
356: packet_send();
1.1 deraadt 357: }
358: }
359:
1.13 markus 360: /*
361: * Waits until the client can do something (some data becomes available on
362: * one of the file descriptors).
363: */
1.1 deraadt 364:
1.20 markus 365: void
1.46 markus 366: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
367: int *maxfdp)
1.11 markus 368: {
1.46 markus 369: /* Add any selections by the channel mechanism. */
370: channel_prepare_select(readsetp, writesetp, maxfdp);
1.11 markus 371:
1.16 markus 372: if (!compat20) {
1.17 markus 373: /* Read from the connection, unless our buffers are full. */
1.16 markus 374: if (buffer_len(&stdout_buffer) < buffer_high &&
375: buffer_len(&stderr_buffer) < buffer_high &&
376: channel_not_very_much_buffered_data())
1.46 markus 377: FD_SET(connection_in, *readsetp);
1.17 markus 378: /*
379: * Read from stdin, unless we have seen EOF or have very much
380: * buffered data to send to the server.
381: */
382: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 383: FD_SET(fileno(stdin), *readsetp);
1.17 markus 384:
385: /* Select stdout/stderr if have data in buffer. */
386: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 387: FD_SET(fileno(stdout), *writesetp);
1.17 markus 388: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 389: FD_SET(fileno(stderr), *writesetp);
1.16 markus 390: } else {
1.46 markus 391: FD_SET(connection_in, *readsetp);
1.16 markus 392: }
1.11 markus 393:
394: /* Select server connection if have data to write to the server. */
395: if (packet_have_data_to_write())
1.46 markus 396: FD_SET(connection_out, *writesetp);
1.11 markus 397:
1.13 markus 398: /*
399: * Wait for something to happen. This will suspend the process until
400: * some selected descriptor can be read, written, or has some other
401: * event pending. Note: if you want to implement SSH_MSG_IGNORE
402: * messages to fool traffic analysis, this might be the place to do
403: * it: just have a random timeout for the select, and send a random
404: * SSH_MSG_IGNORE packet when the timeout expires.
405: */
1.11 markus 406:
1.46 markus 407: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 408: char buf[100];
1.50 ! deraadt 409:
1.11 markus 410: if (errno == EINTR)
411: return;
412: /* Note: we might still have data in the buffers. */
413: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
414: buffer_append(&stderr_buffer, buf, strlen(buf));
415: stderr_bytes += strlen(buf);
416: quit_pending = 1;
417: }
418: }
419:
1.20 markus 420: void
1.31 markus 421: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 422: {
1.11 markus 423: struct winsize oldws, newws;
424:
425: /* Flush stdout and stderr buffers. */
1.31 markus 426: if (buffer_len(bout) > 0)
427: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
428: if (buffer_len(berr) > 0)
429: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 430:
431: leave_raw_mode();
432:
1.13 markus 433: /*
434: * Free (and clear) the buffer to reduce the amount of data that gets
435: * written to swap.
436: */
1.31 markus 437: buffer_free(bin);
438: buffer_free(bout);
439: buffer_free(berr);
1.11 markus 440:
441: /* Save old window size. */
442: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
443:
444: /* Send the suspend signal to the program itself. */
445: kill(getpid(), SIGTSTP);
446:
447: /* Check if the window size has changed. */
448: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
449: (oldws.ws_row != newws.ws_row ||
450: oldws.ws_col != newws.ws_col ||
451: oldws.ws_xpixel != newws.ws_xpixel ||
452: oldws.ws_ypixel != newws.ws_ypixel))
453: received_window_change_signal = 1;
454:
455: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 456: buffer_init(bin);
457: buffer_init(bout);
458: buffer_init(berr);
1.11 markus 459:
460: enter_raw_mode();
461: }
462:
1.20 markus 463: void
1.17 markus 464: client_process_net_input(fd_set * readset)
1.11 markus 465: {
1.17 markus 466: int len;
467: char buf[8192];
1.11 markus 468:
1.13 markus 469: /*
470: * Read input from the server, and add any such data to the buffer of
471: * the packet subsystem.
472: */
1.11 markus 473: if (FD_ISSET(connection_in, readset)) {
474: /* Read as much as possible. */
475: len = read(connection_in, buf, sizeof(buf));
476: if (len == 0) {
477: /* Received EOF. The remote host has closed the connection. */
478: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
479: host);
1.1 deraadt 480: buffer_append(&stderr_buffer, buf, strlen(buf));
481: stderr_bytes += strlen(buf);
482: quit_pending = 1;
483: return;
1.11 markus 484: }
1.13 markus 485: /*
486: * There is a kernel bug on Solaris that causes select to
487: * sometimes wake up even though there is no data available.
488: */
1.11 markus 489: if (len < 0 && errno == EAGAIN)
490: len = 0;
491:
492: if (len < 0) {
493: /* An error has encountered. Perhaps there is a network problem. */
494: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
495: host, strerror(errno));
496: buffer_append(&stderr_buffer, buf, strlen(buf));
497: stderr_bytes += strlen(buf);
498: quit_pending = 1;
499: return;
500: }
501: packet_process_incoming(buf, len);
502: }
1.17 markus 503: }
1.16 markus 504:
1.31 markus 505: /* process the characters one by one */
506: int
507: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
508: {
1.32 markus 509: char string[1024];
1.31 markus 510: pid_t pid;
511: int bytes = 0;
1.42 markus 512: u_int i;
513: u_char ch;
1.31 markus 514: char *s;
515:
516: for (i = 0; i < len; i++) {
517: /* Get one character at a time. */
518: ch = buf[i];
519:
520: if (escape_pending) {
521: /* We have previously seen an escape character. */
522: /* Clear the flag now. */
523: escape_pending = 0;
524:
525: /* Process the escaped character. */
526: switch (ch) {
527: case '.':
528: /* Terminate the connection. */
1.32 markus 529: snprintf(string, sizeof string, "%c.\r\n", escape_char);
530: buffer_append(berr, string, strlen(string));
531: /*stderr_bytes += strlen(string); XXX*/
1.31 markus 532:
533: quit_pending = 1;
534: return -1;
535:
536: case 'Z' - 64:
537: /* Suspend the program. */
538: /* Print a message to that effect to the user. */
1.32 markus 539: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
540: buffer_append(berr, string, strlen(string));
541: /*stderr_bytes += strlen(string); XXX*/
1.31 markus 542:
543: /* Restore terminal modes and suspend. */
544: client_suspend_self(bin, bout, berr);
545:
546: /* We have been continued. */
547: continue;
548:
549: case '&':
550: /* XXX does not work yet with proto 2 */
551: if (compat20)
552: continue;
553: /*
554: * Detach the program (continue to serve connections,
555: * but put in background and no more new connections).
556: */
557: if (!stdin_eof) {
558: /*
559: * Sending SSH_CMSG_EOF alone does not always appear
560: * to be enough. So we try to send an EOF character
561: * first.
562: */
563: packet_start(SSH_CMSG_STDIN_DATA);
564: packet_put_string("\004", 1);
565: packet_send();
566: /* Close stdin. */
567: stdin_eof = 1;
568: if (buffer_len(bin) == 0) {
569: packet_start(SSH_CMSG_EOF);
570: packet_send();
571: }
572: }
573: /* Restore tty modes. */
574: leave_raw_mode();
575:
576: /* Stop listening for new connections. */
577: channel_stop_listening();
578:
579: printf("%c& [backgrounded]\n", escape_char);
580:
581: /* Fork into background. */
582: pid = fork();
583: if (pid < 0) {
584: error("fork: %.100s", strerror(errno));
585: continue;
586: }
587: if (pid != 0) { /* This is the parent. */
588: /* The parent just exits. */
589: exit(0);
590: }
591: /* The child continues serving connections. */
592: continue; /*XXX ? */
593:
594: case '?':
1.32 markus 595: snprintf(string, sizeof string,
1.31 markus 596: "%c?\r\n\
597: Supported escape sequences:\r\n\
598: ~. - terminate connection\r\n\
599: ~^Z - suspend ssh\r\n\
600: ~# - list forwarded connections\r\n\
601: ~& - background ssh (when waiting for connections to terminate)\r\n\
602: ~? - this message\r\n\
603: ~~ - send the escape character by typing it twice\r\n\
604: (Note that escapes are only recognized immediately after newline.)\r\n",
605: escape_char);
1.32 markus 606: buffer_append(berr, string, strlen(string));
1.31 markus 607: continue;
608:
609: case '#':
1.32 markus 610: snprintf(string, sizeof string, "%c#\r\n", escape_char);
611: buffer_append(berr, string, strlen(string));
1.31 markus 612: s = channel_open_message();
613: buffer_append(berr, s, strlen(s));
614: xfree(s);
615: continue;
616:
617: default:
618: if (ch != escape_char) {
619: buffer_put_char(bin, escape_char);
620: bytes++;
621: }
622: /* Escaped characters fall through here */
623: break;
624: }
625: } else {
626: /*
627: * The previous character was not an escape char. Check if this
628: * is an escape.
629: */
630: if (last_was_cr && ch == escape_char) {
631: /* It is. Set the flag and continue to next character. */
632: escape_pending = 1;
633: continue;
634: }
635: }
636:
637: /*
638: * Normal character. Record whether it was a newline,
639: * and append it to the buffer.
640: */
641: last_was_cr = (ch == '\r' || ch == '\n');
642: buffer_put_char(bin, ch);
643: bytes++;
644: }
645: return bytes;
646: }
647:
1.20 markus 648: void
1.17 markus 649: client_process_input(fd_set * readset)
650: {
1.31 markus 651: int ret;
1.21 deraadt 652: int len;
1.31 markus 653: char buf[8192];
1.16 markus 654:
1.11 markus 655: /* Read input from stdin. */
656: if (FD_ISSET(fileno(stdin), readset)) {
657: /* Read as much as possible. */
658: len = read(fileno(stdin), buf, sizeof(buf));
659: if (len <= 0) {
1.13 markus 660: /*
661: * Received EOF or error. They are treated
662: * similarly, except that an error message is printed
663: * if it was an error condition.
664: */
1.11 markus 665: if (len < 0) {
666: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
667: buffer_append(&stderr_buffer, buf, strlen(buf));
668: stderr_bytes += strlen(buf);
669: }
670: /* Mark that we have seen EOF. */
671: stdin_eof = 1;
1.13 markus 672: /*
673: * Send an EOF message to the server unless there is
674: * data in the buffer. If there is data in the
675: * buffer, no message will be sent now. Code
676: * elsewhere will send the EOF when the buffer
677: * becomes empty if stdin_eof is set.
678: */
1.11 markus 679: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 680: packet_start(SSH_CMSG_EOF);
681: packet_send();
1.11 markus 682: }
683: } else if (escape_char == -1) {
1.13 markus 684: /*
685: * Normal successful read, and no escape character.
686: * Just append the data to buffer.
687: */
1.11 markus 688: buffer_append(&stdin_buffer, buf, len);
689: stdin_bytes += len;
690: } else {
1.13 markus 691: /*
692: * Normal, successful read. But we have an escape character
693: * and have to process the characters one by one.
694: */
1.31 markus 695: ret = process_escapes(&stdin_buffer, &stdout_buffer, &stderr_buffer, buf, len);
696: if (ret == -1)
697: return;
698: stdout_bytes += ret;
1.11 markus 699: }
700: }
701: }
702:
1.20 markus 703: void
1.11 markus 704: client_process_output(fd_set * writeset)
705: {
706: int len;
707: char buf[100];
1.1 deraadt 708:
1.11 markus 709: /* Write buffered output to stdout. */
710: if (FD_ISSET(fileno(stdout), writeset)) {
711: /* Write as much data as possible. */
712: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 713: buffer_len(&stdout_buffer));
1.11 markus 714: if (len <= 0) {
715: if (errno == EAGAIN)
716: len = 0;
717: else {
1.13 markus 718: /*
719: * An error or EOF was encountered. Put an
720: * error message to stderr buffer.
721: */
1.11 markus 722: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
723: buffer_append(&stderr_buffer, buf, strlen(buf));
724: stderr_bytes += strlen(buf);
725: quit_pending = 1;
726: return;
727: }
728: }
729: /* Consume printed data from the buffer. */
730: buffer_consume(&stdout_buffer, len);
731: }
732: /* Write buffered output to stderr. */
733: if (FD_ISSET(fileno(stderr), writeset)) {
734: /* Write as much data as possible. */
735: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 736: buffer_len(&stderr_buffer));
1.11 markus 737: if (len <= 0) {
738: if (errno == EAGAIN)
739: len = 0;
740: else {
1.13 markus 741: /* EOF or error, but can't even print error message. */
1.11 markus 742: quit_pending = 1;
743: return;
744: }
745: }
746: /* Consume printed characters from the buffer. */
747: buffer_consume(&stderr_buffer, len);
748: }
1.1 deraadt 749: }
750:
1.13 markus 751: /*
1.15 markus 752: * Get packets from the connection input buffer, and process them as long as
753: * there are packets available.
754: *
755: * Any unknown packets received during the actual
756: * session cause the session to terminate. This is
757: * intended to make debugging easier since no
758: * confirmations are sent. Any compatible protocol
759: * extensions must be negotiated during the
760: * preparatory phase.
761: */
762:
1.20 markus 763: void
1.49 itojun 764: client_process_buffered_input_packets(void)
1.15 markus 765: {
1.36 markus 766: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, NULL);
1.15 markus 767: }
768:
1.31 markus 769: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 770:
771: int
1.31 markus 772: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 773: {
1.31 markus 774: /* XXX we assume c->extended is writeable */
775: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 776: }
777:
1.15 markus 778: /*
1.13 markus 779: * Implements the interactive session with the server. This is called after
780: * the user has been authenticated, and a command has been started on the
781: * remote host. If escape_char != -1, it is the character used as an escape
782: * character for terminating or suspending the session.
783: */
1.1 deraadt 784:
1.20 markus 785: int
1.30 markus 786: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 787: {
1.46 markus 788: fd_set *readset = NULL, *writeset = NULL;
789: int max_fd = 0;
1.11 markus 790: double start_time, total_time;
791: int len;
792: char buf[100];
793:
794: debug("Entering interactive session.");
795:
796: start_time = get_current_time();
797:
798: /* Initialize variables. */
799: escape_pending = 0;
800: last_was_cr = 1;
801: exit_status = -1;
802: stdin_eof = 0;
803: buffer_high = 64 * 1024;
804: connection_in = packet_get_connection_in();
805: connection_out = packet_get_connection_out();
1.46 markus 806: max_fd = MAX(connection_in, connection_out);
807:
808: if (!compat20) {
809: max_fd = MAX(max_fd, fileno(stdin));
810: max_fd = MAX(max_fd, fileno(stdout));
811: max_fd = MAX(max_fd, fileno(stderr));
812: }
1.11 markus 813: stdin_bytes = 0;
814: stdout_bytes = 0;
815: stderr_bytes = 0;
816: quit_pending = 0;
817: escape_char = escape_char_arg;
818:
819: /* Initialize buffers. */
820: buffer_init(&stdin_buffer);
821: buffer_init(&stdout_buffer);
822: buffer_init(&stderr_buffer);
823:
1.15 markus 824: client_init_dispatch();
825:
1.11 markus 826: /* Set signal handlers to restore non-blocking mode. */
827: signal(SIGINT, signal_handler);
828: signal(SIGQUIT, signal_handler);
829: signal(SIGTERM, signal_handler);
830: signal(SIGPIPE, SIG_IGN);
831: if (have_pty)
832: signal(SIGWINCH, window_change_handler);
833:
834: if (have_pty)
835: enter_raw_mode();
836:
1.48 markus 837: if (compat20) {
838: session_ident = ssh2_chan_id;
839: if (escape_char != -1)
840: channel_register_filter(session_ident,
841: simple_escape_filter);
842: } else {
843: /* Check if we should immediately send eof on stdin. */
1.16 markus 844: client_check_initial_eof_on_stdin();
1.48 markus 845: }
1.30 markus 846:
1.11 markus 847: /* Main loop of the client for the interactive session mode. */
848: while (!quit_pending) {
849:
1.13 markus 850: /* Process buffered packets sent by the server. */
1.11 markus 851: client_process_buffered_input_packets();
852:
1.16 markus 853: if (compat20 && !channel_still_open()) {
1.37 markus 854: debug2("!channel_still_open.");
1.16 markus 855: break;
856: }
857:
1.13 markus 858: /*
859: * Make packets of buffered stdin data, and buffer them for
860: * sending to the server.
861: */
1.17 markus 862: if (!compat20)
1.16 markus 863: client_make_packets_from_stdin_data();
1.11 markus 864:
1.13 markus 865: /*
1.46 markus 866: * Make packets from buffered channel data, and enqueue them
1.13 markus 867: * for sending to the server.
868: */
1.11 markus 869: if (packet_not_very_much_data_to_write())
870: channel_output_poll();
871:
1.13 markus 872: /*
873: * Check if the window size has changed, and buffer a message
874: * about it to the server if so.
875: */
1.11 markus 876: client_check_window_change();
877:
878: if (quit_pending)
879: break;
880:
1.13 markus 881: /*
882: * Wait until we have something to do (something becomes
883: * available on one of the descriptors).
884: */
1.46 markus 885: client_wait_until_can_do_something(&readset, &writeset, &max_fd);
1.11 markus 886:
887: if (quit_pending)
888: break;
889:
890: /* Do channel operations. */
1.46 markus 891: channel_after_select(readset, writeset);
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: stderr_bytes += strlen(buf);
935: }
936: /* Output any buffered data for stdout. */
937: while (buffer_len(&stdout_buffer) > 0) {
938: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 939: buffer_len(&stdout_buffer));
1.11 markus 940: if (len <= 0) {
941: error("Write failed flushing stdout buffer.");
942: break;
943: }
944: buffer_consume(&stdout_buffer, len);
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);
956: }
957:
958: if (have_pty)
959: leave_raw_mode();
960:
961: /* Clear and free any buffers. */
962: memset(buf, 0, sizeof(buf));
963: buffer_free(&stdin_buffer);
964: buffer_free(&stdout_buffer);
965: buffer_free(&stderr_buffer);
966:
967: /* Report bytes transferred, and transfer rates. */
968: total_time = get_current_time() - start_time;
969: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
970: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
971: if (total_time > 0)
972: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
973: stdin_bytes / total_time, stdout_bytes / total_time,
974: stderr_bytes / total_time);
975:
976: /* Return the exit status of the program. */
977: debug("Exit status %d", exit_status);
978: return exit_status;
1.15 markus 979: }
980:
981: /*********/
982:
983: void
1.36 markus 984: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 985: {
1.42 markus 986: u_int data_len;
1.15 markus 987: char *data = packet_get_string(&data_len);
988: packet_integrity_check(plen, 4 + data_len, type);
989: buffer_append(&stdout_buffer, data, data_len);
990: stdout_bytes += 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: stdout_bytes += data_len;
1002: memset(data, 0, data_len);
1003: xfree(data);
1004: }
1005: void
1.36 markus 1006: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1007: {
1008: packet_integrity_check(plen, 4, type);
1009: exit_status = packet_get_int();
1010: /* Acknowledge the exit. */
1011: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1012: packet_send();
1013: /*
1014: * Must wait for packet to be sent since we are
1015: * exiting the loop.
1016: */
1017: packet_write_wait();
1018: /* Flag that we want to exit. */
1019: quit_pending = 1;
1020: }
1021:
1.40 markus 1022: Channel *
1023: client_request_forwarded_tcpip(const char *request_type, int rchan)
1024: {
1025: Channel* c = NULL;
1026: char *listen_address, *originator_address;
1027: int listen_port, originator_port;
1028: int sock, newch;
1029:
1030: /* Get rest of the packet */
1031: listen_address = packet_get_string(NULL);
1032: listen_port = packet_get_int();
1033: originator_address = packet_get_string(NULL);
1034: originator_port = packet_get_int();
1035: packet_done();
1036:
1037: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1038: listen_address, listen_port, originator_address, originator_port);
1039:
1040: sock = channel_connect_by_listen_adress(listen_port);
1041: if (sock >= 0) {
1042: newch = channel_new("forwarded-tcpip",
1.41 markus 1043: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1044: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1045: xstrdup(originator_address), 1);
1046: c = channel_lookup(newch);
1047: }
1048: xfree(originator_address);
1049: xfree(listen_address);
1050: return c;
1051: }
1052:
1053: Channel*
1054: client_request_x11(const char *request_type, int rchan)
1055: {
1056: Channel *c = NULL;
1057: char *originator;
1058: int originator_port;
1059: int sock, newch;
1060:
1061: if (!options.forward_x11) {
1062: error("Warning: ssh server tried X11 forwarding.");
1063: error("Warning: this is probably a break in attempt by a malicious server.");
1064: return NULL;
1065: }
1066: originator = packet_get_string(NULL);
1067: if (datafellows & SSH_BUG_X11FWD) {
1068: debug2("buggy server: x11 request w/o originator_port");
1069: originator_port = 0;
1070: } else {
1071: originator_port = packet_get_int();
1072: }
1073: packet_done();
1074: /* XXX check permission */
1.47 markus 1075: debug("client_request_x11: request from %s %d", originator,
1076: originator_port);
1.40 markus 1077: sock = x11_connect_display();
1078: if (sock >= 0) {
1079: newch = channel_new("x11",
1080: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1081: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1082: xstrdup("x11"), 1);
1083: c = channel_lookup(newch);
1084: }
1085: xfree(originator);
1086: return c;
1087: }
1088:
1089: Channel*
1090: client_request_agent(const char *request_type, int rchan)
1091: {
1092: Channel *c = NULL;
1093: int sock, newch;
1094:
1095: if (!options.forward_agent) {
1096: error("Warning: ssh server tried agent forwarding.");
1097: error("Warning: this is probably a break in attempt by a malicious server.");
1098: return NULL;
1099: }
1100: sock = ssh_get_authentication_socket();
1101: if (sock >= 0) {
1102: newch = channel_new("authentication agent connection",
1103: SSH_CHANNEL_OPEN, sock, sock, -1,
1104: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1105: xstrdup("authentication agent connection"), 1);
1106: c = channel_lookup(newch);
1107: }
1108: return c;
1109: }
1110:
1.22 markus 1111: /* XXXX move to generic input handler */
1112: void
1.36 markus 1113: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1114: {
1115: Channel *c = NULL;
1116: char *ctype;
1.42 markus 1117: u_int len;
1.22 markus 1118: int rchan;
1119: int rmaxpack;
1120: int rwindow;
1121:
1122: ctype = packet_get_string(&len);
1123: rchan = packet_get_int();
1124: rwindow = packet_get_int();
1125: rmaxpack = packet_get_int();
1126:
1.24 markus 1127: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1128: ctype, rchan, rwindow, rmaxpack);
1129:
1.40 markus 1130: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1131: c = client_request_forwarded_tcpip(ctype, rchan);
1132: } else if (strcmp(ctype, "x11") == 0) {
1133: c = client_request_x11(ctype, rchan);
1134: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1135: c = client_request_agent(ctype, rchan);
1.22 markus 1136: }
1137: /* XXX duplicate : */
1138: if (c != NULL) {
1139: debug("confirm %s", ctype);
1140: c->remote_id = rchan;
1141: c->remote_window = rwindow;
1142: c->remote_maxpacket = rmaxpack;
1143:
1144: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1145: packet_put_int(c->remote_id);
1146: packet_put_int(c->self);
1147: packet_put_int(c->local_window);
1148: packet_put_int(c->local_maxpacket);
1149: packet_send();
1150: } else {
1151: debug("failure %s", ctype);
1152: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1153: packet_put_int(rchan);
1154: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1155: packet_put_cstring("bla bla");
1156: packet_put_cstring("");
1157: packet_send();
1158: }
1159: xfree(ctype);
1160: }
1.48 markus 1161: void
1162: client_input_channel_req(int type, int plen, void *ctxt)
1163: {
1164: Channel *c = NULL;
1165: int id, reply, success = 0;
1166: char *rtype;
1167:
1168: id = packet_get_int();
1169: rtype = packet_get_string(NULL);
1170: reply = packet_get_char();
1171:
1172: debug("client_input_channel_req: channel %d rtype %s reply %d",
1173: id, rtype, reply);
1174:
1175: if (session_ident == -1) {
1176: error("client_input_channel_req: no channel %d", session_ident);
1177: } else if (id != session_ident) {
1178: error("client_input_channel_req: channel %d: wrong channel: %d",
1179: session_ident, id);
1180: }
1181: c = channel_lookup(id);
1182: if (c == NULL) {
1183: error("client_input_channel_req: channel %d: unknown channel", id);
1184: } else if (strcmp(rtype, "exit-status") == 0) {
1185: success = 1;
1186: exit_status = packet_get_int();
1187: packet_done();
1188: }
1189: if (reply) {
1190: packet_start(success ?
1191: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1192: packet_put_int(c->remote_id);
1193: packet_send();
1194: }
1195: xfree(rtype);
1196: }
1.22 markus 1197:
1.20 markus 1198: void
1.49 itojun 1199: client_init_dispatch_20(void)
1.16 markus 1200: {
1201: dispatch_init(&dispatch_protocol_error);
1202: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1203: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1204: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1205: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1206: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1207: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1208: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1209: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1210: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1211: }
1.20 markus 1212: void
1.49 itojun 1213: client_init_dispatch_13(void)
1.15 markus 1214: {
1215: dispatch_init(NULL);
1216: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1217: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1218: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1219: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1220: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1221: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1222: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1223: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1224: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1225:
1226: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1227: &auth_input_open_request : &deny_input_open);
1228: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1229: &x11_input_open : &deny_input_open);
1.15 markus 1230: }
1.20 markus 1231: void
1.49 itojun 1232: client_init_dispatch_15(void)
1.15 markus 1233: {
1234: client_init_dispatch_13();
1235: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1236: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1237: }
1.20 markus 1238: void
1.49 itojun 1239: client_init_dispatch(void)
1.15 markus 1240: {
1.16 markus 1241: if (compat20)
1242: client_init_dispatch_20();
1243: else if (compat13)
1.15 markus 1244: client_init_dispatch_13();
1245: else
1246: client_init_dispatch_15();
1.1 deraadt 1247: }
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