Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.61
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"
1.61 ! markus 62: RCSID("$OpenBSD: clientloop.c,v 1.60 2001/04/05 21:05:23 markus Exp $");
1.1 deraadt 63:
1.45 markus 64: #include "ssh.h"
65: #include "ssh1.h"
66: #include "ssh2.h"
1.1 deraadt 67: #include "xmalloc.h"
68: #include "packet.h"
69: #include "buffer.h"
1.15 markus 70: #include "compat.h"
71: #include "channels.h"
72: #include "dispatch.h"
1.30 markus 73: #include "buffer.h"
74: #include "bufaux.h"
1.40 markus 75: #include "key.h"
1.54 markus 76: #include "kex.h"
1.45 markus 77: #include "log.h"
78: #include "readconf.h"
79: #include "clientloop.h"
1.40 markus 80: #include "authfd.h"
1.45 markus 81: #include "atomicio.h"
1.39 markus 82:
83: /* import options */
84: extern Options options;
85:
1.1 deraadt 86: /* Flag indicating that stdin should be redirected from /dev/null. */
87: extern int stdin_null_flag;
88:
1.13 markus 89: /*
90: * Name of the host we are connecting to. This is the name given on the
91: * command line, or the HostName specified for the user-supplied name in a
92: * configuration file.
93: */
1.1 deraadt 94: extern char *host;
95:
1.13 markus 96: /*
97: * Flag to indicate that we have received a window change signal which has
98: * not yet been processed. This will cause a message indicating the new
99: * window size to be sent to the server a little later. This is volatile
100: * because this is updated in a signal handler.
101: */
1.1 deraadt 102: static volatile int received_window_change_signal = 0;
103:
104: /* Terminal modes, as saved by enter_raw_mode. */
105: static struct termios saved_tio;
106:
1.13 markus 107: /*
108: * Flag indicating whether we are in raw mode. This is used by
109: * enter_raw_mode and leave_raw_mode.
110: */
1.1 deraadt 111: static int in_raw_mode = 0;
112:
113: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
114: static int in_non_blocking_mode = 0;
115:
116: /* Common data for the client loop code. */
1.31 markus 117: static int quit_pending; /* Set to non-zero to quit the client loop. */
118: static int escape_char; /* Escape character. */
1.11 markus 119: static int escape_pending; /* Last character was the escape character */
120: static int last_was_cr; /* Last character was a newline. */
121: static int exit_status; /* Used to store the exit status of the command. */
122: static int stdin_eof; /* EOF has been encountered on standard error. */
123: static Buffer stdin_buffer; /* Buffer for stdin data. */
124: static Buffer stdout_buffer; /* Buffer for stdout data. */
125: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 126: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
127: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 128: static int connection_in; /* Connection to server (input). */
129: static int connection_out; /* Connection to server (output). */
1.56 markus 130: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 131: static int session_closed = 0; /* In SSH2: login session closed. */
1.1 deraadt 132:
1.16 markus 133: void client_init_dispatch(void);
134: int session_ident = -1;
135:
1.54 markus 136: /*XXX*/
137: extern Kex *xxx_kex;
138:
1.13 markus 139: /* Returns the user\'s terminal to normal mode if it had been put in raw mode. */
1.1 deraadt 140:
1.20 markus 141: void
1.49 itojun 142: leave_raw_mode(void)
1.1 deraadt 143: {
1.11 markus 144: if (!in_raw_mode)
145: return;
146: in_raw_mode = 0;
147: if (tcsetattr(fileno(stdin), TCSADRAIN, &saved_tio) < 0)
148: perror("tcsetattr");
1.1 deraadt 149:
1.11 markus 150: fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
1.1 deraadt 151: }
152:
153: /* Puts the user\'s terminal in raw mode. */
154:
1.20 markus 155: void
1.49 itojun 156: enter_raw_mode(void)
1.1 deraadt 157: {
1.11 markus 158: struct termios tio;
1.1 deraadt 159:
1.11 markus 160: if (tcgetattr(fileno(stdin), &tio) < 0)
161: perror("tcgetattr");
162: saved_tio = tio;
163: tio.c_iflag |= IGNPAR;
164: tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
165: tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
1.1 deraadt 166: #ifdef IEXTEN
1.11 markus 167: tio.c_lflag &= ~IEXTEN;
168: #endif /* IEXTEN */
169: tio.c_oflag &= ~OPOST;
170: tio.c_cc[VMIN] = 1;
171: tio.c_cc[VTIME] = 0;
172: if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) < 0)
173: perror("tcsetattr");
174: in_raw_mode = 1;
1.1 deraadt 175:
1.11 markus 176: fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
177: }
1.1 deraadt 178:
179: /* Restores stdin to blocking mode. */
180:
1.20 markus 181: void
1.49 itojun 182: leave_non_blocking(void)
1.1 deraadt 183: {
1.11 markus 184: if (in_non_blocking_mode) {
185: (void) fcntl(fileno(stdin), F_SETFL, 0);
186: in_non_blocking_mode = 0;
187: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
188: }
1.1 deraadt 189: }
190:
1.11 markus 191: /* Puts stdin terminal in non-blocking mode. */
192:
1.20 markus 193: void
1.49 itojun 194: enter_non_blocking(void)
1.1 deraadt 195: {
1.11 markus 196: in_non_blocking_mode = 1;
197: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
198: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 199: }
200:
1.13 markus 201: /*
202: * Signal handler for the window change signal (SIGWINCH). This just sets a
203: * flag indicating that the window has changed.
204: */
1.1 deraadt 205:
1.20 markus 206: void
1.11 markus 207: window_change_handler(int sig)
1.1 deraadt 208: {
1.11 markus 209: received_window_change_signal = 1;
210: signal(SIGWINCH, window_change_handler);
1.1 deraadt 211: }
212:
1.13 markus 213: /*
214: * Signal handler for signals that cause the program to terminate. These
215: * signals must be trapped to restore terminal modes.
216: */
1.1 deraadt 217:
1.20 markus 218: void
1.11 markus 219: signal_handler(int sig)
1.1 deraadt 220: {
1.11 markus 221: if (in_raw_mode)
222: leave_raw_mode();
223: if (in_non_blocking_mode)
224: leave_non_blocking();
225: channel_stop_listening();
226: packet_close();
227: fatal("Killed by signal %d.", sig);
1.1 deraadt 228: }
229:
1.13 markus 230: /*
231: * Returns current time in seconds from Jan 1, 1970 with the maximum
232: * available resolution.
233: */
1.1 deraadt 234:
1.20 markus 235: double
1.49 itojun 236: get_current_time(void)
1.1 deraadt 237: {
1.11 markus 238: struct timeval tv;
239: gettimeofday(&tv, NULL);
240: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 241: }
242:
1.13 markus 243: /*
244: * This is called when the interactive is entered. This checks if there is
245: * an EOF coming on stdin. We must check this explicitly, as select() does
246: * not appear to wake up when redirecting from /dev/null.
247: */
1.1 deraadt 248:
1.20 markus 249: void
1.49 itojun 250: client_check_initial_eof_on_stdin(void)
1.1 deraadt 251: {
1.11 markus 252: int len;
253: char buf[1];
1.1 deraadt 254:
1.13 markus 255: /*
256: * If standard input is to be "redirected from /dev/null", we simply
257: * mark that we have seen an EOF and send an EOF message to the
258: * server. Otherwise, we try to read a single character; it appears
259: * that for some files, such /dev/null, select() never wakes up for
260: * read for this descriptor, which means that we never get EOF. This
261: * way we will get the EOF if stdin comes from /dev/null or similar.
262: */
1.11 markus 263: if (stdin_null_flag) {
264: /* Fake EOF on stdin. */
265: debug("Sending eof.");
266: stdin_eof = 1;
267: packet_start(SSH_CMSG_EOF);
268: packet_send();
269: } else {
270: enter_non_blocking();
271:
272: /* Check for immediate EOF on stdin. */
273: len = read(fileno(stdin), buf, 1);
274: if (len == 0) {
1.13 markus 275: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 276: debug("Sending eof.");
277: stdin_eof = 1;
278: packet_start(SSH_CMSG_EOF);
279: packet_send();
280: } else if (len > 0) {
1.13 markus 281: /*
282: * Got data. We must store the data in the buffer,
283: * and also process it as an escape character if
284: * appropriate.
285: */
1.42 markus 286: if ((u_char) buf[0] == escape_char)
1.11 markus 287: escape_pending = 1;
1.52 markus 288: else
1.11 markus 289: buffer_append(&stdin_buffer, buf, 1);
290: }
291: leave_non_blocking();
292: }
1.1 deraadt 293: }
294:
295:
1.13 markus 296: /*
297: * Make packets from buffered stdin data, and buffer them for sending to the
298: * connection.
299: */
1.1 deraadt 300:
1.20 markus 301: void
1.49 itojun 302: client_make_packets_from_stdin_data(void)
1.1 deraadt 303: {
1.42 markus 304: u_int len;
1.1 deraadt 305:
1.11 markus 306: /* Send buffered stdin data to the server. */
307: while (buffer_len(&stdin_buffer) > 0 &&
308: packet_not_very_much_data_to_write()) {
309: len = buffer_len(&stdin_buffer);
310: /* Keep the packets at reasonable size. */
311: if (len > packet_get_maxsize())
312: len = packet_get_maxsize();
313: packet_start(SSH_CMSG_STDIN_DATA);
314: packet_put_string(buffer_ptr(&stdin_buffer), len);
315: packet_send();
316: buffer_consume(&stdin_buffer, len);
1.52 markus 317: stdin_bytes += len;
1.11 markus 318: /* If we have a pending EOF, send it now. */
319: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
320: packet_start(SSH_CMSG_EOF);
321: packet_send();
322: }
1.1 deraadt 323: }
324: }
325:
1.13 markus 326: /*
327: * Checks if the client window has changed, and sends a packet about it to
328: * the server if so. The actual change is detected elsewhere (by a software
329: * interrupt on Unix); this just checks the flag and sends a message if
330: * appropriate.
331: */
1.1 deraadt 332:
1.20 markus 333: void
1.49 itojun 334: client_check_window_change(void)
1.1 deraadt 335: {
1.16 markus 336: struct winsize ws;
337:
338: if (! received_window_change_signal)
339: return;
340: /** XXX race */
341: received_window_change_signal = 0;
342:
343: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
344: return;
345:
1.37 markus 346: debug2("client_check_window_change: changed");
1.16 markus 347:
348: if (compat20) {
349: channel_request_start(session_ident, "window-change", 0);
350: packet_put_int(ws.ws_col);
351: packet_put_int(ws.ws_row);
352: packet_put_int(ws.ws_xpixel);
353: packet_put_int(ws.ws_ypixel);
354: packet_send();
355: } else {
356: packet_start(SSH_CMSG_WINDOW_SIZE);
357: packet_put_int(ws.ws_row);
358: packet_put_int(ws.ws_col);
359: packet_put_int(ws.ws_xpixel);
360: packet_put_int(ws.ws_ypixel);
361: packet_send();
1.1 deraadt 362: }
363: }
364:
1.13 markus 365: /*
366: * Waits until the client can do something (some data becomes available on
367: * one of the file descriptors).
368: */
1.1 deraadt 369:
1.20 markus 370: void
1.46 markus 371: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.56 markus 372: int *maxfdp, int rekeying)
1.11 markus 373: {
1.46 markus 374: /* Add any selections by the channel mechanism. */
1.56 markus 375: channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
1.11 markus 376:
1.16 markus 377: if (!compat20) {
1.17 markus 378: /* Read from the connection, unless our buffers are full. */
1.16 markus 379: if (buffer_len(&stdout_buffer) < buffer_high &&
380: buffer_len(&stderr_buffer) < buffer_high &&
381: channel_not_very_much_buffered_data())
1.46 markus 382: FD_SET(connection_in, *readsetp);
1.17 markus 383: /*
384: * Read from stdin, unless we have seen EOF or have very much
385: * buffered data to send to the server.
386: */
387: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 388: FD_SET(fileno(stdin), *readsetp);
1.17 markus 389:
390: /* Select stdout/stderr if have data in buffer. */
391: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 392: FD_SET(fileno(stdout), *writesetp);
1.17 markus 393: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 394: FD_SET(fileno(stderr), *writesetp);
1.16 markus 395: } else {
1.46 markus 396: FD_SET(connection_in, *readsetp);
1.16 markus 397: }
1.11 markus 398:
399: /* Select server connection if have data to write to the server. */
400: if (packet_have_data_to_write())
1.46 markus 401: FD_SET(connection_out, *writesetp);
1.11 markus 402:
1.13 markus 403: /*
404: * Wait for something to happen. This will suspend the process until
405: * some selected descriptor can be read, written, or has some other
406: * event pending. Note: if you want to implement SSH_MSG_IGNORE
407: * messages to fool traffic analysis, this might be the place to do
408: * it: just have a random timeout for the select, and send a random
409: * SSH_MSG_IGNORE packet when the timeout expires.
410: */
1.11 markus 411:
1.46 markus 412: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 413: char buf[100];
1.51 markus 414:
415: /*
416: * We have to clear the select masks, because we return.
417: * We have to return, because the mainloop checks for the flags
418: * set by the signal handlers.
419: */
420: memset(*readsetp, 0, *maxfdp);
421: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 422:
1.11 markus 423: if (errno == EINTR)
424: return;
425: /* Note: we might still have data in the buffers. */
426: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
427: buffer_append(&stderr_buffer, buf, strlen(buf));
428: quit_pending = 1;
429: }
430: }
431:
1.20 markus 432: void
1.31 markus 433: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 434: {
1.11 markus 435: struct winsize oldws, newws;
436:
437: /* Flush stdout and stderr buffers. */
1.31 markus 438: if (buffer_len(bout) > 0)
439: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
440: if (buffer_len(berr) > 0)
441: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 442:
443: leave_raw_mode();
444:
1.13 markus 445: /*
446: * Free (and clear) the buffer to reduce the amount of data that gets
447: * written to swap.
448: */
1.31 markus 449: buffer_free(bin);
450: buffer_free(bout);
451: buffer_free(berr);
1.11 markus 452:
453: /* Save old window size. */
454: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
455:
456: /* Send the suspend signal to the program itself. */
457: kill(getpid(), SIGTSTP);
458:
459: /* Check if the window size has changed. */
460: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
461: (oldws.ws_row != newws.ws_row ||
462: oldws.ws_col != newws.ws_col ||
463: oldws.ws_xpixel != newws.ws_xpixel ||
464: oldws.ws_ypixel != newws.ws_ypixel))
465: received_window_change_signal = 1;
466:
467: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 468: buffer_init(bin);
469: buffer_init(bout);
470: buffer_init(berr);
1.11 markus 471:
472: enter_raw_mode();
473: }
474:
1.20 markus 475: void
1.17 markus 476: client_process_net_input(fd_set * readset)
1.11 markus 477: {
1.17 markus 478: int len;
479: char buf[8192];
1.11 markus 480:
1.13 markus 481: /*
482: * Read input from the server, and add any such data to the buffer of
483: * the packet subsystem.
484: */
1.11 markus 485: if (FD_ISSET(connection_in, readset)) {
486: /* Read as much as possible. */
487: len = read(connection_in, buf, sizeof(buf));
488: if (len == 0) {
489: /* Received EOF. The remote host has closed the connection. */
490: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
491: host);
1.1 deraadt 492: buffer_append(&stderr_buffer, buf, strlen(buf));
493: quit_pending = 1;
494: return;
1.11 markus 495: }
1.13 markus 496: /*
497: * There is a kernel bug on Solaris that causes select to
498: * sometimes wake up even though there is no data available.
499: */
1.53 millert 500: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 501: len = 0;
502:
503: if (len < 0) {
504: /* An error has encountered. Perhaps there is a network problem. */
505: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
506: host, strerror(errno));
507: buffer_append(&stderr_buffer, buf, strlen(buf));
508: quit_pending = 1;
509: return;
510: }
511: packet_process_incoming(buf, len);
512: }
1.17 markus 513: }
1.16 markus 514:
1.31 markus 515: /* process the characters one by one */
516: int
517: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
518: {
1.32 markus 519: char string[1024];
1.31 markus 520: pid_t pid;
521: int bytes = 0;
1.42 markus 522: u_int i;
523: u_char ch;
1.31 markus 524: char *s;
525:
526: for (i = 0; i < len; i++) {
527: /* Get one character at a time. */
528: ch = buf[i];
529:
530: if (escape_pending) {
531: /* We have previously seen an escape character. */
532: /* Clear the flag now. */
533: escape_pending = 0;
534:
535: /* Process the escaped character. */
536: switch (ch) {
537: case '.':
538: /* Terminate the connection. */
1.32 markus 539: snprintf(string, sizeof string, "%c.\r\n", escape_char);
540: buffer_append(berr, string, strlen(string));
1.31 markus 541:
542: quit_pending = 1;
543: return -1;
544:
545: case 'Z' - 64:
546: /* Suspend the program. */
547: /* Print a message to that effect to the user. */
1.32 markus 548: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
549: buffer_append(berr, string, strlen(string));
1.31 markus 550:
551: /* Restore terminal modes and suspend. */
552: client_suspend_self(bin, bout, berr);
553:
554: /* We have been continued. */
555: continue;
556:
1.54 markus 557: case 'R':
1.59 markus 558: if (compat20) {
559: if (datafellows & SSH_BUG_NOREKEY)
560: log("Server does not support re-keying");
561: else
562: need_rekeying = 1;
563: }
1.54 markus 564: continue;
565:
1.31 markus 566: case '&':
567: /* XXX does not work yet with proto 2 */
568: if (compat20)
569: continue;
570: /*
571: * Detach the program (continue to serve connections,
572: * but put in background and no more new connections).
573: */
574: if (!stdin_eof) {
575: /*
576: * Sending SSH_CMSG_EOF alone does not always appear
577: * to be enough. So we try to send an EOF character
578: * first.
579: */
580: packet_start(SSH_CMSG_STDIN_DATA);
581: packet_put_string("\004", 1);
582: packet_send();
583: /* Close stdin. */
584: stdin_eof = 1;
585: if (buffer_len(bin) == 0) {
586: packet_start(SSH_CMSG_EOF);
587: packet_send();
588: }
589: }
590: /* Restore tty modes. */
591: leave_raw_mode();
592:
593: /* Stop listening for new connections. */
594: channel_stop_listening();
595:
596: printf("%c& [backgrounded]\n", escape_char);
597:
598: /* Fork into background. */
599: pid = fork();
600: if (pid < 0) {
601: error("fork: %.100s", strerror(errno));
602: continue;
603: }
604: if (pid != 0) { /* This is the parent. */
605: /* The parent just exits. */
606: exit(0);
607: }
608: /* The child continues serving connections. */
609: continue; /*XXX ? */
610:
611: case '?':
1.32 markus 612: snprintf(string, sizeof string,
1.31 markus 613: "%c?\r\n\
614: Supported escape sequences:\r\n\
615: ~. - terminate connection\r\n\
616: ~^Z - suspend ssh\r\n\
617: ~# - list forwarded connections\r\n\
618: ~& - background ssh (when waiting for connections to terminate)\r\n\
619: ~? - this message\r\n\
620: ~~ - send the escape character by typing it twice\r\n\
621: (Note that escapes are only recognized immediately after newline.)\r\n",
622: escape_char);
1.32 markus 623: buffer_append(berr, string, strlen(string));
1.31 markus 624: continue;
625:
626: case '#':
1.32 markus 627: snprintf(string, sizeof string, "%c#\r\n", escape_char);
628: buffer_append(berr, string, strlen(string));
1.31 markus 629: s = channel_open_message();
630: buffer_append(berr, s, strlen(s));
631: xfree(s);
632: continue;
633:
634: default:
635: if (ch != escape_char) {
636: buffer_put_char(bin, escape_char);
637: bytes++;
638: }
639: /* Escaped characters fall through here */
640: break;
641: }
642: } else {
643: /*
644: * The previous character was not an escape char. Check if this
645: * is an escape.
646: */
647: if (last_was_cr && ch == escape_char) {
648: /* It is. Set the flag and continue to next character. */
649: escape_pending = 1;
650: continue;
651: }
652: }
653:
654: /*
655: * Normal character. Record whether it was a newline,
656: * and append it to the buffer.
657: */
658: last_was_cr = (ch == '\r' || ch == '\n');
659: buffer_put_char(bin, ch);
660: bytes++;
661: }
662: return bytes;
663: }
664:
1.20 markus 665: void
1.17 markus 666: client_process_input(fd_set * readset)
667: {
1.21 deraadt 668: int len;
1.31 markus 669: char buf[8192];
1.16 markus 670:
1.11 markus 671: /* Read input from stdin. */
672: if (FD_ISSET(fileno(stdin), readset)) {
673: /* Read as much as possible. */
674: len = read(fileno(stdin), buf, sizeof(buf));
675: if (len <= 0) {
1.13 markus 676: /*
677: * Received EOF or error. They are treated
678: * similarly, except that an error message is printed
679: * if it was an error condition.
680: */
1.11 markus 681: if (len < 0) {
682: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
683: buffer_append(&stderr_buffer, buf, strlen(buf));
684: }
685: /* Mark that we have seen EOF. */
686: stdin_eof = 1;
1.13 markus 687: /*
688: * Send an EOF message to the server unless there is
689: * data in the buffer. If there is data in the
690: * buffer, no message will be sent now. Code
691: * elsewhere will send the EOF when the buffer
692: * becomes empty if stdin_eof is set.
693: */
1.11 markus 694: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 695: packet_start(SSH_CMSG_EOF);
696: packet_send();
1.11 markus 697: }
698: } else if (escape_char == -1) {
1.13 markus 699: /*
700: * Normal successful read, and no escape character.
701: * Just append the data to buffer.
702: */
1.11 markus 703: buffer_append(&stdin_buffer, buf, len);
704: } else {
1.13 markus 705: /*
706: * Normal, successful read. But we have an escape character
707: * and have to process the characters one by one.
708: */
1.52 markus 709: if (process_escapes(&stdin_buffer, &stdout_buffer,
710: &stderr_buffer, buf, len) == -1)
1.31 markus 711: return;
1.11 markus 712: }
713: }
714: }
715:
1.20 markus 716: void
1.11 markus 717: client_process_output(fd_set * writeset)
718: {
719: int len;
720: char buf[100];
1.1 deraadt 721:
1.11 markus 722: /* Write buffered output to stdout. */
723: if (FD_ISSET(fileno(stdout), writeset)) {
724: /* Write as much data as possible. */
725: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 726: buffer_len(&stdout_buffer));
1.11 markus 727: if (len <= 0) {
728: if (errno == EAGAIN)
729: len = 0;
730: else {
1.13 markus 731: /*
732: * An error or EOF was encountered. Put an
733: * error message to stderr buffer.
734: */
1.11 markus 735: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
736: buffer_append(&stderr_buffer, buf, strlen(buf));
737: quit_pending = 1;
738: return;
739: }
740: }
741: /* Consume printed data from the buffer. */
742: buffer_consume(&stdout_buffer, len);
1.57 markus 743: stdout_bytes += len;
1.11 markus 744: }
745: /* Write buffered output to stderr. */
746: if (FD_ISSET(fileno(stderr), writeset)) {
747: /* Write as much data as possible. */
748: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 749: buffer_len(&stderr_buffer));
1.11 markus 750: if (len <= 0) {
751: if (errno == EAGAIN)
752: len = 0;
753: else {
1.13 markus 754: /* EOF or error, but can't even print error message. */
1.11 markus 755: quit_pending = 1;
756: return;
757: }
758: }
759: /* Consume printed characters from the buffer. */
760: buffer_consume(&stderr_buffer, len);
1.57 markus 761: stderr_bytes += len;
1.11 markus 762: }
1.1 deraadt 763: }
764:
1.13 markus 765: /*
1.15 markus 766: * Get packets from the connection input buffer, and process them as long as
767: * there are packets available.
768: *
769: * Any unknown packets received during the actual
770: * session cause the session to terminate. This is
771: * intended to make debugging easier since no
772: * confirmations are sent. Any compatible protocol
773: * extensions must be negotiated during the
774: * preparatory phase.
775: */
776:
1.20 markus 777: void
1.49 itojun 778: client_process_buffered_input_packets(void)
1.15 markus 779: {
1.54 markus 780: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 781: }
782:
1.31 markus 783: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 784:
785: int
1.31 markus 786: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 787: {
1.31 markus 788: /* XXX we assume c->extended is writeable */
789: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 790: }
791:
1.60 markus 792: void
793: client_channel_closed(int id, void *arg)
794: {
795: if (id != session_ident)
796: error("client_channel_closed: id %d != session_ident %d",
797: id, session_ident);
798: session_closed = 1;
1.61 ! markus 799: if (in_raw_mode)
! 800: leave_raw_mode();
1.60 markus 801: }
802:
1.15 markus 803: /*
1.13 markus 804: * Implements the interactive session with the server. This is called after
805: * the user has been authenticated, and a command has been started on the
806: * remote host. If escape_char != -1, it is the character used as an escape
807: * character for terminating or suspending the session.
808: */
1.1 deraadt 809:
1.20 markus 810: int
1.30 markus 811: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 812: {
1.46 markus 813: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 814: double start_time, total_time;
1.56 markus 815: int max_fd = 0, len, rekeying = 0;
1.11 markus 816: char buf[100];
817:
818: debug("Entering interactive session.");
819:
820: start_time = get_current_time();
821:
822: /* Initialize variables. */
823: escape_pending = 0;
824: last_was_cr = 1;
825: exit_status = -1;
826: stdin_eof = 0;
827: buffer_high = 64 * 1024;
828: connection_in = packet_get_connection_in();
829: connection_out = packet_get_connection_out();
1.46 markus 830: max_fd = MAX(connection_in, connection_out);
831:
832: if (!compat20) {
833: max_fd = MAX(max_fd, fileno(stdin));
834: max_fd = MAX(max_fd, fileno(stdout));
835: max_fd = MAX(max_fd, fileno(stderr));
836: }
1.11 markus 837: stdin_bytes = 0;
838: stdout_bytes = 0;
839: stderr_bytes = 0;
840: quit_pending = 0;
841: escape_char = escape_char_arg;
842:
843: /* Initialize buffers. */
844: buffer_init(&stdin_buffer);
845: buffer_init(&stdout_buffer);
846: buffer_init(&stderr_buffer);
847:
1.15 markus 848: client_init_dispatch();
849:
1.11 markus 850: /* Set signal handlers to restore non-blocking mode. */
851: signal(SIGINT, signal_handler);
852: signal(SIGQUIT, signal_handler);
853: signal(SIGTERM, signal_handler);
854: signal(SIGPIPE, SIG_IGN);
855: if (have_pty)
856: signal(SIGWINCH, window_change_handler);
857:
858: if (have_pty)
859: enter_raw_mode();
860:
1.48 markus 861: if (compat20) {
862: session_ident = ssh2_chan_id;
863: if (escape_char != -1)
864: channel_register_filter(session_ident,
865: simple_escape_filter);
1.60 markus 866: if (session_ident != -1)
867: channel_register_cleanup(session_ident,
868: client_channel_closed);
1.48 markus 869: } else {
870: /* Check if we should immediately send eof on stdin. */
1.16 markus 871: client_check_initial_eof_on_stdin();
1.48 markus 872: }
1.30 markus 873:
1.11 markus 874: /* Main loop of the client for the interactive session mode. */
875: while (!quit_pending) {
876:
1.13 markus 877: /* Process buffered packets sent by the server. */
1.11 markus 878: client_process_buffered_input_packets();
879:
1.60 markus 880: if (compat20 && session_closed && !channel_still_open())
881: break;
882:
1.56 markus 883: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 884:
1.56 markus 885: if (rekeying) {
886: debug("rekeying in progress");
887: } else {
888: /*
889: * Make packets of buffered stdin data, and buffer
890: * them for sending to the server.
891: */
892: if (!compat20)
893: client_make_packets_from_stdin_data();
1.11 markus 894:
1.56 markus 895: /*
896: * Make packets from buffered channel data, and
897: * enqueue them for sending to the server.
898: */
899: if (packet_not_very_much_data_to_write())
900: channel_output_poll();
1.11 markus 901:
1.56 markus 902: /*
903: * Check if the window size has changed, and buffer a
904: * message about it to the server if so.
905: */
906: client_check_window_change();
1.11 markus 907:
1.56 markus 908: if (quit_pending)
909: break;
910: }
1.13 markus 911: /*
912: * Wait until we have something to do (something becomes
913: * available on one of the descriptors).
914: */
1.56 markus 915: client_wait_until_can_do_something(&readset, &writeset,
916: &max_fd, rekeying);
1.11 markus 917:
918: if (quit_pending)
919: break;
920:
1.56 markus 921: /* Do channel operations unless rekeying in progress. */
922: if (!rekeying) {
923: channel_after_select(readset, writeset);
924:
925: if (need_rekeying) {
926: debug("user requests rekeying");
927: xxx_kex->done = 0;
928: kex_send_kexinit(xxx_kex);
929: need_rekeying = 0;
930: }
931: }
1.11 markus 932:
1.17 markus 933: /* Buffer input from the connection. */
1.46 markus 934: client_process_net_input(readset);
1.17 markus 935:
936: if (quit_pending)
937: break;
1.11 markus 938:
1.17 markus 939: if (!compat20) {
940: /* Buffer data from stdin */
1.46 markus 941: client_process_input(readset);
1.17 markus 942: /*
943: * Process output to stdout and stderr. Output to
944: * the connection is processed elsewhere (above).
945: */
1.46 markus 946: client_process_output(writeset);
1.17 markus 947: }
1.11 markus 948:
1.13 markus 949: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 950: if (FD_ISSET(connection_out, writeset))
1.11 markus 951: packet_write_poll();
952: }
1.46 markus 953: if (readset)
954: xfree(readset);
955: if (writeset)
956: xfree(writeset);
1.11 markus 957:
958: /* Terminate the session. */
959:
960: /* Stop watching for window change. */
961: if (have_pty)
962: signal(SIGWINCH, SIG_DFL);
963:
964: /* Stop listening for connections. */
965: channel_stop_listening();
966:
1.13 markus 967: /*
968: * In interactive mode (with pseudo tty) display a message indicating
969: * that the connection has been closed.
970: */
1.11 markus 971: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
972: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
973: buffer_append(&stderr_buffer, buf, strlen(buf));
974: }
975: /* Output any buffered data for stdout. */
976: while (buffer_len(&stdout_buffer) > 0) {
977: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 978: buffer_len(&stdout_buffer));
1.11 markus 979: if (len <= 0) {
980: error("Write failed flushing stdout buffer.");
981: break;
982: }
983: buffer_consume(&stdout_buffer, len);
1.57 markus 984: stdout_bytes += len;
1.11 markus 985: }
986:
987: /* Output any buffered data for stderr. */
988: while (buffer_len(&stderr_buffer) > 0) {
989: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 990: buffer_len(&stderr_buffer));
1.11 markus 991: if (len <= 0) {
992: error("Write failed flushing stderr buffer.");
993: break;
994: }
995: buffer_consume(&stderr_buffer, len);
1.57 markus 996: stderr_bytes += len;
1.11 markus 997: }
998:
999: if (have_pty)
1000: leave_raw_mode();
1001:
1002: /* Clear and free any buffers. */
1003: memset(buf, 0, sizeof(buf));
1004: buffer_free(&stdin_buffer);
1005: buffer_free(&stdout_buffer);
1006: buffer_free(&stderr_buffer);
1007:
1008: /* Report bytes transferred, and transfer rates. */
1009: total_time = get_current_time() - start_time;
1010: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
1011: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
1012: if (total_time > 0)
1013: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
1014: stdin_bytes / total_time, stdout_bytes / total_time,
1015: stderr_bytes / total_time);
1016:
1017: /* Return the exit status of the program. */
1018: debug("Exit status %d", exit_status);
1019: return exit_status;
1.15 markus 1020: }
1021:
1022: /*********/
1023:
1024: void
1.36 markus 1025: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 1026: {
1.42 markus 1027: u_int data_len;
1.15 markus 1028: char *data = packet_get_string(&data_len);
1029: packet_integrity_check(plen, 4 + data_len, type);
1030: buffer_append(&stdout_buffer, data, data_len);
1031: memset(data, 0, data_len);
1032: xfree(data);
1033: }
1034: void
1.36 markus 1035: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 1036: {
1.42 markus 1037: u_int data_len;
1.15 markus 1038: char *data = packet_get_string(&data_len);
1039: packet_integrity_check(plen, 4 + data_len, type);
1040: buffer_append(&stderr_buffer, data, data_len);
1041: memset(data, 0, data_len);
1042: xfree(data);
1043: }
1044: void
1.36 markus 1045: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1046: {
1047: packet_integrity_check(plen, 4, type);
1048: exit_status = packet_get_int();
1049: /* Acknowledge the exit. */
1050: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1051: packet_send();
1052: /*
1053: * Must wait for packet to be sent since we are
1054: * exiting the loop.
1055: */
1056: packet_write_wait();
1057: /* Flag that we want to exit. */
1058: quit_pending = 1;
1059: }
1060:
1.40 markus 1061: Channel *
1062: client_request_forwarded_tcpip(const char *request_type, int rchan)
1063: {
1064: Channel* c = NULL;
1065: char *listen_address, *originator_address;
1066: int listen_port, originator_port;
1067: int sock, newch;
1068:
1069: /* Get rest of the packet */
1070: listen_address = packet_get_string(NULL);
1071: listen_port = packet_get_int();
1072: originator_address = packet_get_string(NULL);
1073: originator_port = packet_get_int();
1074: packet_done();
1075:
1076: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1077: listen_address, listen_port, originator_address, originator_port);
1078:
1079: sock = channel_connect_by_listen_adress(listen_port);
1080: if (sock >= 0) {
1081: newch = channel_new("forwarded-tcpip",
1.41 markus 1082: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1.40 markus 1083: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1084: xstrdup(originator_address), 1);
1085: c = channel_lookup(newch);
1086: }
1087: xfree(originator_address);
1088: xfree(listen_address);
1089: return c;
1090: }
1091:
1092: Channel*
1093: client_request_x11(const char *request_type, int rchan)
1094: {
1095: Channel *c = NULL;
1096: char *originator;
1097: int originator_port;
1098: int sock, newch;
1099:
1100: if (!options.forward_x11) {
1101: error("Warning: ssh server tried X11 forwarding.");
1102: error("Warning: this is probably a break in attempt by a malicious server.");
1103: return NULL;
1104: }
1105: originator = packet_get_string(NULL);
1106: if (datafellows & SSH_BUG_X11FWD) {
1107: debug2("buggy server: x11 request w/o originator_port");
1108: originator_port = 0;
1109: } else {
1110: originator_port = packet_get_int();
1111: }
1112: packet_done();
1113: /* XXX check permission */
1.47 markus 1114: debug("client_request_x11: request from %s %d", originator,
1115: originator_port);
1.40 markus 1116: sock = x11_connect_display();
1117: if (sock >= 0) {
1118: newch = channel_new("x11",
1119: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1120: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1121: xstrdup("x11"), 1);
1122: c = channel_lookup(newch);
1123: }
1124: xfree(originator);
1125: return c;
1126: }
1127:
1128: Channel*
1129: client_request_agent(const char *request_type, int rchan)
1130: {
1131: Channel *c = NULL;
1132: int sock, newch;
1133:
1134: if (!options.forward_agent) {
1135: error("Warning: ssh server tried agent forwarding.");
1136: error("Warning: this is probably a break in attempt by a malicious server.");
1137: return NULL;
1138: }
1139: sock = ssh_get_authentication_socket();
1140: if (sock >= 0) {
1141: newch = channel_new("authentication agent connection",
1142: SSH_CHANNEL_OPEN, sock, sock, -1,
1143: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1144: xstrdup("authentication agent connection"), 1);
1145: c = channel_lookup(newch);
1146: }
1147: return c;
1148: }
1149:
1.22 markus 1150: /* XXXX move to generic input handler */
1151: void
1.36 markus 1152: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1153: {
1154: Channel *c = NULL;
1155: char *ctype;
1.42 markus 1156: u_int len;
1.22 markus 1157: int rchan;
1158: int rmaxpack;
1159: int rwindow;
1160:
1161: ctype = packet_get_string(&len);
1162: rchan = packet_get_int();
1163: rwindow = packet_get_int();
1164: rmaxpack = packet_get_int();
1165:
1.24 markus 1166: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1167: ctype, rchan, rwindow, rmaxpack);
1168:
1.40 markus 1169: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1170: c = client_request_forwarded_tcpip(ctype, rchan);
1171: } else if (strcmp(ctype, "x11") == 0) {
1172: c = client_request_x11(ctype, rchan);
1173: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1174: c = client_request_agent(ctype, rchan);
1.22 markus 1175: }
1176: /* XXX duplicate : */
1177: if (c != NULL) {
1178: debug("confirm %s", ctype);
1179: c->remote_id = rchan;
1180: c->remote_window = rwindow;
1181: c->remote_maxpacket = rmaxpack;
1182:
1183: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1184: packet_put_int(c->remote_id);
1185: packet_put_int(c->self);
1186: packet_put_int(c->local_window);
1187: packet_put_int(c->local_maxpacket);
1188: packet_send();
1189: } else {
1190: debug("failure %s", ctype);
1191: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1192: packet_put_int(rchan);
1193: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1194: packet_put_cstring("bla bla");
1195: packet_put_cstring("");
1196: packet_send();
1197: }
1198: xfree(ctype);
1199: }
1.48 markus 1200: void
1201: client_input_channel_req(int type, int plen, void *ctxt)
1202: {
1203: Channel *c = NULL;
1204: int id, reply, success = 0;
1205: char *rtype;
1206:
1207: id = packet_get_int();
1208: rtype = packet_get_string(NULL);
1209: reply = packet_get_char();
1210:
1211: debug("client_input_channel_req: channel %d rtype %s reply %d",
1212: id, rtype, reply);
1213:
1214: if (session_ident == -1) {
1215: error("client_input_channel_req: no channel %d", session_ident);
1216: } else if (id != session_ident) {
1217: error("client_input_channel_req: channel %d: wrong channel: %d",
1218: session_ident, id);
1219: }
1220: c = channel_lookup(id);
1221: if (c == NULL) {
1222: error("client_input_channel_req: channel %d: unknown channel", id);
1223: } else if (strcmp(rtype, "exit-status") == 0) {
1224: success = 1;
1225: exit_status = packet_get_int();
1226: packet_done();
1227: }
1228: if (reply) {
1229: packet_start(success ?
1230: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1231: packet_put_int(c->remote_id);
1232: packet_send();
1233: }
1234: xfree(rtype);
1235: }
1.22 markus 1236:
1.20 markus 1237: void
1.49 itojun 1238: client_init_dispatch_20(void)
1.16 markus 1239: {
1.55 markus 1240: dispatch_init(&dispatch_protocol_error);
1.16 markus 1241: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1242: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1243: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1244: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1245: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1246: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1247: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1248: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1249: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1250:
1251: /* rekeying */
1252: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1253: }
1.20 markus 1254: void
1.49 itojun 1255: client_init_dispatch_13(void)
1.15 markus 1256: {
1257: dispatch_init(NULL);
1258: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1259: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1260: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1261: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1262: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1263: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1264: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1265: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1266: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1267:
1268: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1269: &auth_input_open_request : &deny_input_open);
1270: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1271: &x11_input_open : &deny_input_open);
1.15 markus 1272: }
1.20 markus 1273: void
1.49 itojun 1274: client_init_dispatch_15(void)
1.15 markus 1275: {
1276: client_init_dispatch_13();
1277: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1278: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1279: }
1.20 markus 1280: void
1.49 itojun 1281: client_init_dispatch(void)
1.15 markus 1282: {
1.16 markus 1283: if (compat20)
1284: client_init_dispatch_20();
1285: else if (compat13)
1.15 markus 1286: client_init_dispatch_13();
1287: else
1288: client_init_dispatch_15();
1.1 deraadt 1289: }
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