Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.80
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.
1.78 markus 38: * Copyright (c) 1999, 2000, 2001 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"
1.80 ! stevesk 62: RCSID("$OpenBSD: clientloop.c,v 1.79 2001/06/29 18:38:44 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"
1.74 markus 71: #include "channels.h"
1.15 markus 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;
1.75 markus 105: static volatile int received_signal = 0;
1.1 deraadt 106:
107: /* Flag indicating whether the user\'s terminal is in non-blocking mode. */
108: static int in_non_blocking_mode = 0;
109:
110: /* Common data for the client loop code. */
1.31 markus 111: static int quit_pending; /* Set to non-zero to quit the client loop. */
112: static int escape_char; /* Escape character. */
1.11 markus 113: static int escape_pending; /* Last character was the escape character */
114: static int last_was_cr; /* Last character was a newline. */
115: static int exit_status; /* Used to store the exit status of the command. */
116: static int stdin_eof; /* EOF has been encountered on standard error. */
117: static Buffer stdin_buffer; /* Buffer for stdin data. */
118: static Buffer stdout_buffer; /* Buffer for stdout data. */
119: static Buffer stderr_buffer; /* Buffer for stderr data. */
1.42 markus 120: static u_long stdin_bytes, stdout_bytes, stderr_bytes;
121: static u_int buffer_high;/* Soft max buffer size. */
1.11 markus 122: static int connection_in; /* Connection to server (input). */
123: static int connection_out; /* Connection to server (output). */
1.56 markus 124: static int need_rekeying; /* Set to non-zero if rekeying is requested. */
1.60 markus 125: static int session_closed = 0; /* In SSH2: login session closed. */
1.1 deraadt 126:
1.77 itojun 127: static void client_init_dispatch(void);
1.16 markus 128: int session_ident = -1;
129:
1.54 markus 130: /*XXX*/
131: extern Kex *xxx_kex;
132:
1.1 deraadt 133: /* Restores stdin to blocking mode. */
134:
1.77 itojun 135: static void
1.49 itojun 136: leave_non_blocking(void)
1.1 deraadt 137: {
1.11 markus 138: if (in_non_blocking_mode) {
139: (void) fcntl(fileno(stdin), F_SETFL, 0);
140: in_non_blocking_mode = 0;
141: fatal_remove_cleanup((void (*) (void *)) leave_non_blocking, NULL);
142: }
1.1 deraadt 143: }
144:
1.11 markus 145: /* Puts stdin terminal in non-blocking mode. */
146:
1.77 itojun 147: static void
1.49 itojun 148: enter_non_blocking(void)
1.1 deraadt 149: {
1.11 markus 150: in_non_blocking_mode = 1;
151: (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
152: fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
1.1 deraadt 153: }
154:
1.13 markus 155: /*
156: * Signal handler for the window change signal (SIGWINCH). This just sets a
157: * flag indicating that the window has changed.
158: */
1.1 deraadt 159:
1.77 itojun 160: static void
1.11 markus 161: window_change_handler(int sig)
1.1 deraadt 162: {
1.11 markus 163: received_window_change_signal = 1;
164: signal(SIGWINCH, window_change_handler);
1.1 deraadt 165: }
166:
1.13 markus 167: /*
168: * Signal handler for signals that cause the program to terminate. These
169: * signals must be trapped to restore terminal modes.
170: */
1.1 deraadt 171:
1.77 itojun 172: static void
1.11 markus 173: signal_handler(int sig)
1.1 deraadt 174: {
1.75 markus 175: received_signal = sig;
176: quit_pending = 1;
1.1 deraadt 177: }
178:
1.13 markus 179: /*
180: * Returns current time in seconds from Jan 1, 1970 with the maximum
181: * available resolution.
182: */
1.1 deraadt 183:
1.77 itojun 184: static double
1.49 itojun 185: get_current_time(void)
1.1 deraadt 186: {
1.11 markus 187: struct timeval tv;
188: gettimeofday(&tv, NULL);
189: return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
1.1 deraadt 190: }
191:
1.13 markus 192: /*
193: * This is called when the interactive is entered. This checks if there is
194: * an EOF coming on stdin. We must check this explicitly, as select() does
195: * not appear to wake up when redirecting from /dev/null.
196: */
1.1 deraadt 197:
1.77 itojun 198: static void
1.49 itojun 199: client_check_initial_eof_on_stdin(void)
1.1 deraadt 200: {
1.11 markus 201: int len;
202: char buf[1];
1.1 deraadt 203:
1.13 markus 204: /*
205: * If standard input is to be "redirected from /dev/null", we simply
206: * mark that we have seen an EOF and send an EOF message to the
207: * server. Otherwise, we try to read a single character; it appears
208: * that for some files, such /dev/null, select() never wakes up for
209: * read for this descriptor, which means that we never get EOF. This
210: * way we will get the EOF if stdin comes from /dev/null or similar.
211: */
1.11 markus 212: if (stdin_null_flag) {
213: /* Fake EOF on stdin. */
214: debug("Sending eof.");
215: stdin_eof = 1;
216: packet_start(SSH_CMSG_EOF);
217: packet_send();
218: } else {
219: enter_non_blocking();
220:
221: /* Check for immediate EOF on stdin. */
222: len = read(fileno(stdin), buf, 1);
223: if (len == 0) {
1.13 markus 224: /* EOF. Record that we have seen it and send EOF to server. */
1.11 markus 225: debug("Sending eof.");
226: stdin_eof = 1;
227: packet_start(SSH_CMSG_EOF);
228: packet_send();
229: } else if (len > 0) {
1.13 markus 230: /*
231: * Got data. We must store the data in the buffer,
232: * and also process it as an escape character if
233: * appropriate.
234: */
1.42 markus 235: if ((u_char) buf[0] == escape_char)
1.11 markus 236: escape_pending = 1;
1.52 markus 237: else
1.11 markus 238: buffer_append(&stdin_buffer, buf, 1);
239: }
240: leave_non_blocking();
241: }
1.1 deraadt 242: }
243:
244:
1.13 markus 245: /*
246: * Make packets from buffered stdin data, and buffer them for sending to the
247: * connection.
248: */
1.1 deraadt 249:
1.77 itojun 250: static void
1.49 itojun 251: client_make_packets_from_stdin_data(void)
1.1 deraadt 252: {
1.42 markus 253: u_int len;
1.1 deraadt 254:
1.11 markus 255: /* Send buffered stdin data to the server. */
256: while (buffer_len(&stdin_buffer) > 0 &&
257: packet_not_very_much_data_to_write()) {
258: len = buffer_len(&stdin_buffer);
259: /* Keep the packets at reasonable size. */
260: if (len > packet_get_maxsize())
261: len = packet_get_maxsize();
262: packet_start(SSH_CMSG_STDIN_DATA);
263: packet_put_string(buffer_ptr(&stdin_buffer), len);
264: packet_send();
265: buffer_consume(&stdin_buffer, len);
1.52 markus 266: stdin_bytes += len;
1.11 markus 267: /* If we have a pending EOF, send it now. */
268: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
269: packet_start(SSH_CMSG_EOF);
270: packet_send();
271: }
1.1 deraadt 272: }
273: }
274:
1.13 markus 275: /*
276: * Checks if the client window has changed, and sends a packet about it to
277: * the server if so. The actual change is detected elsewhere (by a software
278: * interrupt on Unix); this just checks the flag and sends a message if
279: * appropriate.
280: */
1.1 deraadt 281:
1.77 itojun 282: static void
1.49 itojun 283: client_check_window_change(void)
1.1 deraadt 284: {
1.16 markus 285: struct winsize ws;
286:
287: if (! received_window_change_signal)
288: return;
289: /** XXX race */
290: received_window_change_signal = 0;
291:
292: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
293: return;
294:
1.37 markus 295: debug2("client_check_window_change: changed");
1.16 markus 296:
297: if (compat20) {
298: channel_request_start(session_ident, "window-change", 0);
299: packet_put_int(ws.ws_col);
300: packet_put_int(ws.ws_row);
301: packet_put_int(ws.ws_xpixel);
302: packet_put_int(ws.ws_ypixel);
303: packet_send();
304: } else {
305: packet_start(SSH_CMSG_WINDOW_SIZE);
306: packet_put_int(ws.ws_row);
307: packet_put_int(ws.ws_col);
308: packet_put_int(ws.ws_xpixel);
309: packet_put_int(ws.ws_ypixel);
310: packet_send();
1.1 deraadt 311: }
312: }
313:
1.13 markus 314: /*
315: * Waits until the client can do something (some data becomes available on
316: * one of the file descriptors).
317: */
1.1 deraadt 318:
1.77 itojun 319: static void
1.46 markus 320: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
1.56 markus 321: int *maxfdp, int rekeying)
1.11 markus 322: {
1.46 markus 323: /* Add any selections by the channel mechanism. */
1.56 markus 324: channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
1.11 markus 325:
1.16 markus 326: if (!compat20) {
1.17 markus 327: /* Read from the connection, unless our buffers are full. */
1.16 markus 328: if (buffer_len(&stdout_buffer) < buffer_high &&
329: buffer_len(&stderr_buffer) < buffer_high &&
330: channel_not_very_much_buffered_data())
1.46 markus 331: FD_SET(connection_in, *readsetp);
1.17 markus 332: /*
333: * Read from stdin, unless we have seen EOF or have very much
334: * buffered data to send to the server.
335: */
336: if (!stdin_eof && packet_not_very_much_data_to_write())
1.46 markus 337: FD_SET(fileno(stdin), *readsetp);
1.17 markus 338:
339: /* Select stdout/stderr if have data in buffer. */
340: if (buffer_len(&stdout_buffer) > 0)
1.46 markus 341: FD_SET(fileno(stdout), *writesetp);
1.17 markus 342: if (buffer_len(&stderr_buffer) > 0)
1.46 markus 343: FD_SET(fileno(stderr), *writesetp);
1.16 markus 344: } else {
1.71 markus 345: /* channel_prepare_select could have closed the last channel */
346: if (session_closed && !channel_still_open()) {
347: if (!packet_have_data_to_write())
348: return;
349: } else {
350: FD_SET(connection_in, *readsetp);
351: }
1.16 markus 352: }
1.11 markus 353:
354: /* Select server connection if have data to write to the server. */
355: if (packet_have_data_to_write())
1.46 markus 356: FD_SET(connection_out, *writesetp);
1.11 markus 357:
1.13 markus 358: /*
359: * Wait for something to happen. This will suspend the process until
360: * some selected descriptor can be read, written, or has some other
361: * event pending. Note: if you want to implement SSH_MSG_IGNORE
362: * messages to fool traffic analysis, this might be the place to do
363: * it: just have a random timeout for the select, and send a random
364: * SSH_MSG_IGNORE packet when the timeout expires.
365: */
1.11 markus 366:
1.46 markus 367: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 368: char buf[100];
1.51 markus 369:
370: /*
371: * We have to clear the select masks, because we return.
372: * We have to return, because the mainloop checks for the flags
373: * set by the signal handlers.
374: */
375: memset(*readsetp, 0, *maxfdp);
376: memset(*writesetp, 0, *maxfdp);
1.50 deraadt 377:
1.11 markus 378: if (errno == EINTR)
379: return;
380: /* Note: we might still have data in the buffers. */
381: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
382: buffer_append(&stderr_buffer, buf, strlen(buf));
383: quit_pending = 1;
384: }
385: }
386:
1.77 itojun 387: static void
1.31 markus 388: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 389: {
1.11 markus 390: struct winsize oldws, newws;
391:
392: /* Flush stdout and stderr buffers. */
1.31 markus 393: if (buffer_len(bout) > 0)
394: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
395: if (buffer_len(berr) > 0)
396: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 397:
398: leave_raw_mode();
399:
1.13 markus 400: /*
401: * Free (and clear) the buffer to reduce the amount of data that gets
402: * written to swap.
403: */
1.31 markus 404: buffer_free(bin);
405: buffer_free(bout);
406: buffer_free(berr);
1.11 markus 407:
408: /* Save old window size. */
409: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
410:
411: /* Send the suspend signal to the program itself. */
412: kill(getpid(), SIGTSTP);
413:
414: /* Check if the window size has changed. */
415: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
416: (oldws.ws_row != newws.ws_row ||
417: oldws.ws_col != newws.ws_col ||
418: oldws.ws_xpixel != newws.ws_xpixel ||
419: oldws.ws_ypixel != newws.ws_ypixel))
420: received_window_change_signal = 1;
421:
422: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 423: buffer_init(bin);
424: buffer_init(bout);
425: buffer_init(berr);
1.11 markus 426:
427: enter_raw_mode();
428: }
429:
1.77 itojun 430: static void
1.17 markus 431: client_process_net_input(fd_set * readset)
1.11 markus 432: {
1.17 markus 433: int len;
434: char buf[8192];
1.11 markus 435:
1.13 markus 436: /*
437: * Read input from the server, and add any such data to the buffer of
438: * the packet subsystem.
439: */
1.11 markus 440: if (FD_ISSET(connection_in, readset)) {
441: /* Read as much as possible. */
442: len = read(connection_in, buf, sizeof(buf));
443: if (len == 0) {
444: /* Received EOF. The remote host has closed the connection. */
445: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
446: host);
1.1 deraadt 447: buffer_append(&stderr_buffer, buf, strlen(buf));
448: quit_pending = 1;
449: return;
1.11 markus 450: }
1.13 markus 451: /*
452: * There is a kernel bug on Solaris that causes select to
453: * sometimes wake up even though there is no data available.
454: */
1.53 millert 455: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 456: len = 0;
457:
458: if (len < 0) {
459: /* An error has encountered. Perhaps there is a network problem. */
460: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
461: host, strerror(errno));
462: buffer_append(&stderr_buffer, buf, strlen(buf));
463: quit_pending = 1;
464: return;
465: }
466: packet_process_incoming(buf, len);
467: }
1.17 markus 468: }
1.16 markus 469:
1.31 markus 470: /* process the characters one by one */
1.77 itojun 471: static int
1.31 markus 472: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
473: {
1.32 markus 474: char string[1024];
1.31 markus 475: pid_t pid;
476: int bytes = 0;
1.42 markus 477: u_int i;
478: u_char ch;
1.31 markus 479: char *s;
480:
481: for (i = 0; i < len; i++) {
482: /* Get one character at a time. */
483: ch = buf[i];
484:
485: if (escape_pending) {
486: /* We have previously seen an escape character. */
487: /* Clear the flag now. */
488: escape_pending = 0;
489:
490: /* Process the escaped character. */
491: switch (ch) {
492: case '.':
493: /* Terminate the connection. */
1.32 markus 494: snprintf(string, sizeof string, "%c.\r\n", escape_char);
495: buffer_append(berr, string, strlen(string));
1.31 markus 496:
497: quit_pending = 1;
498: return -1;
499:
500: case 'Z' - 64:
501: /* Suspend the program. */
502: /* Print a message to that effect to the user. */
1.32 markus 503: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
504: buffer_append(berr, string, strlen(string));
1.31 markus 505:
506: /* Restore terminal modes and suspend. */
507: client_suspend_self(bin, bout, berr);
508:
509: /* We have been continued. */
510: continue;
511:
1.54 markus 512: case 'R':
1.59 markus 513: if (compat20) {
514: if (datafellows & SSH_BUG_NOREKEY)
515: log("Server does not support re-keying");
516: else
517: need_rekeying = 1;
518: }
1.54 markus 519: continue;
520:
1.31 markus 521: case '&':
522: /* XXX does not work yet with proto 2 */
523: if (compat20)
524: continue;
525: /*
526: * Detach the program (continue to serve connections,
527: * but put in background and no more new connections).
528: */
529: if (!stdin_eof) {
530: /*
531: * Sending SSH_CMSG_EOF alone does not always appear
532: * to be enough. So we try to send an EOF character
533: * first.
534: */
535: packet_start(SSH_CMSG_STDIN_DATA);
536: packet_put_string("\004", 1);
537: packet_send();
538: /* Close stdin. */
539: stdin_eof = 1;
540: if (buffer_len(bin) == 0) {
541: packet_start(SSH_CMSG_EOF);
542: packet_send();
543: }
544: }
545: /* Restore tty modes. */
546: leave_raw_mode();
547:
548: /* Stop listening for new connections. */
1.76 markus 549: channel_close_all(); /* proto1 only XXXX */
1.31 markus 550:
551: printf("%c& [backgrounded]\n", escape_char);
552:
553: /* Fork into background. */
554: pid = fork();
555: if (pid < 0) {
556: error("fork: %.100s", strerror(errno));
557: continue;
558: }
559: if (pid != 0) { /* This is the parent. */
560: /* The parent just exits. */
561: exit(0);
562: }
563: /* The child continues serving connections. */
564: continue; /*XXX ? */
565:
566: case '?':
1.32 markus 567: snprintf(string, sizeof string,
1.31 markus 568: "%c?\r\n\
569: Supported escape sequences:\r\n\
570: ~. - terminate connection\r\n\
1.72 stevesk 571: ~R - Request rekey (SSH protocol 2 only)\r\n\
1.31 markus 572: ~^Z - suspend ssh\r\n\
573: ~# - list forwarded connections\r\n\
574: ~& - background ssh (when waiting for connections to terminate)\r\n\
575: ~? - this message\r\n\
576: ~~ - send the escape character by typing it twice\r\n\
577: (Note that escapes are only recognized immediately after newline.)\r\n",
578: escape_char);
1.32 markus 579: buffer_append(berr, string, strlen(string));
1.31 markus 580: continue;
581:
582: case '#':
1.32 markus 583: snprintf(string, sizeof string, "%c#\r\n", escape_char);
584: buffer_append(berr, string, strlen(string));
1.31 markus 585: s = channel_open_message();
586: buffer_append(berr, s, strlen(s));
587: xfree(s);
588: continue;
589:
590: default:
591: if (ch != escape_char) {
592: buffer_put_char(bin, escape_char);
593: bytes++;
594: }
595: /* Escaped characters fall through here */
596: break;
597: }
598: } else {
599: /*
600: * The previous character was not an escape char. Check if this
601: * is an escape.
602: */
603: if (last_was_cr && ch == escape_char) {
604: /* It is. Set the flag and continue to next character. */
605: escape_pending = 1;
606: continue;
607: }
608: }
609:
610: /*
611: * Normal character. Record whether it was a newline,
612: * and append it to the buffer.
613: */
614: last_was_cr = (ch == '\r' || ch == '\n');
615: buffer_put_char(bin, ch);
616: bytes++;
617: }
618: return bytes;
619: }
620:
1.77 itojun 621: static void
1.17 markus 622: client_process_input(fd_set * readset)
623: {
1.21 deraadt 624: int len;
1.31 markus 625: char buf[8192];
1.16 markus 626:
1.11 markus 627: /* Read input from stdin. */
628: if (FD_ISSET(fileno(stdin), readset)) {
629: /* Read as much as possible. */
630: len = read(fileno(stdin), buf, sizeof(buf));
1.64 markus 631: if (len < 0 && (errno == EAGAIN || errno == EINTR))
632: return; /* we'll try again later */
1.11 markus 633: if (len <= 0) {
1.13 markus 634: /*
635: * Received EOF or error. They are treated
636: * similarly, except that an error message is printed
637: * if it was an error condition.
638: */
1.11 markus 639: if (len < 0) {
640: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
641: buffer_append(&stderr_buffer, buf, strlen(buf));
642: }
643: /* Mark that we have seen EOF. */
644: stdin_eof = 1;
1.13 markus 645: /*
646: * Send an EOF message to the server unless there is
647: * data in the buffer. If there is data in the
648: * buffer, no message will be sent now. Code
649: * elsewhere will send the EOF when the buffer
650: * becomes empty if stdin_eof is set.
651: */
1.11 markus 652: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 653: packet_start(SSH_CMSG_EOF);
654: packet_send();
1.11 markus 655: }
1.72 stevesk 656: } else if (escape_char == SSH_ESCAPECHAR_NONE) {
1.13 markus 657: /*
658: * Normal successful read, and no escape character.
659: * Just append the data to buffer.
660: */
1.11 markus 661: buffer_append(&stdin_buffer, buf, len);
662: } else {
1.13 markus 663: /*
664: * Normal, successful read. But we have an escape character
665: * and have to process the characters one by one.
666: */
1.52 markus 667: if (process_escapes(&stdin_buffer, &stdout_buffer,
668: &stderr_buffer, buf, len) == -1)
1.31 markus 669: return;
1.11 markus 670: }
671: }
672: }
673:
1.77 itojun 674: static void
1.11 markus 675: client_process_output(fd_set * writeset)
676: {
677: int len;
678: char buf[100];
1.1 deraadt 679:
1.11 markus 680: /* Write buffered output to stdout. */
681: if (FD_ISSET(fileno(stdout), writeset)) {
682: /* Write as much data as possible. */
683: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 684: buffer_len(&stdout_buffer));
1.11 markus 685: if (len <= 0) {
1.64 markus 686: if (errno == EINTR || errno == EAGAIN)
1.11 markus 687: len = 0;
688: else {
1.13 markus 689: /*
690: * An error or EOF was encountered. Put an
691: * error message to stderr buffer.
692: */
1.11 markus 693: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
694: buffer_append(&stderr_buffer, buf, strlen(buf));
695: quit_pending = 1;
696: return;
697: }
698: }
699: /* Consume printed data from the buffer. */
700: buffer_consume(&stdout_buffer, len);
1.57 markus 701: stdout_bytes += len;
1.11 markus 702: }
703: /* Write buffered output to stderr. */
704: if (FD_ISSET(fileno(stderr), writeset)) {
705: /* Write as much data as possible. */
706: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 707: buffer_len(&stderr_buffer));
1.11 markus 708: if (len <= 0) {
1.64 markus 709: if (errno == EINTR || errno == EAGAIN)
1.11 markus 710: len = 0;
711: else {
1.13 markus 712: /* EOF or error, but can't even print error message. */
1.11 markus 713: quit_pending = 1;
714: return;
715: }
716: }
717: /* Consume printed characters from the buffer. */
718: buffer_consume(&stderr_buffer, len);
1.57 markus 719: stderr_bytes += len;
1.11 markus 720: }
1.1 deraadt 721: }
722:
1.13 markus 723: /*
1.15 markus 724: * Get packets from the connection input buffer, and process them as long as
725: * there are packets available.
726: *
727: * Any unknown packets received during the actual
728: * session cause the session to terminate. This is
729: * intended to make debugging easier since no
730: * confirmations are sent. Any compatible protocol
731: * extensions must be negotiated during the
732: * preparatory phase.
733: */
734:
1.77 itojun 735: static void
1.49 itojun 736: client_process_buffered_input_packets(void)
1.15 markus 737: {
1.54 markus 738: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
1.15 markus 739: }
740:
1.31 markus 741: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 742:
1.77 itojun 743: static int
1.31 markus 744: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 745: {
1.31 markus 746: /* XXX we assume c->extended is writeable */
747: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 748: }
749:
1.77 itojun 750: static void
1.60 markus 751: client_channel_closed(int id, void *arg)
752: {
753: if (id != session_ident)
754: error("client_channel_closed: id %d != session_ident %d",
755: id, session_ident);
756: session_closed = 1;
1.62 stevesk 757: if (in_raw_mode())
1.61 markus 758: leave_raw_mode();
1.60 markus 759: }
760:
1.15 markus 761: /*
1.13 markus 762: * Implements the interactive session with the server. This is called after
763: * the user has been authenticated, and a command has been started on the
1.72 stevesk 764: * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
765: * used as an escape character for terminating or suspending the session.
1.13 markus 766: */
1.1 deraadt 767:
1.20 markus 768: int
1.30 markus 769: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 770: {
1.46 markus 771: fd_set *readset = NULL, *writeset = NULL;
1.11 markus 772: double start_time, total_time;
1.56 markus 773: int max_fd = 0, len, rekeying = 0;
1.11 markus 774: char buf[100];
775:
776: debug("Entering interactive session.");
777:
778: start_time = get_current_time();
779:
780: /* Initialize variables. */
781: escape_pending = 0;
782: last_was_cr = 1;
783: exit_status = -1;
784: stdin_eof = 0;
785: buffer_high = 64 * 1024;
786: connection_in = packet_get_connection_in();
787: connection_out = packet_get_connection_out();
1.46 markus 788: max_fd = MAX(connection_in, connection_out);
789:
790: if (!compat20) {
1.63 markus 791: /* enable nonblocking unless tty */
792: if (!isatty(fileno(stdin)))
793: set_nonblock(fileno(stdin));
794: if (!isatty(fileno(stdout)))
795: set_nonblock(fileno(stdout));
796: if (!isatty(fileno(stderr)))
797: set_nonblock(fileno(stderr));
1.46 markus 798: max_fd = MAX(max_fd, fileno(stdin));
799: max_fd = MAX(max_fd, fileno(stdout));
800: max_fd = MAX(max_fd, fileno(stderr));
801: }
1.11 markus 802: stdin_bytes = 0;
803: stdout_bytes = 0;
804: stderr_bytes = 0;
805: quit_pending = 0;
806: escape_char = escape_char_arg;
807:
808: /* Initialize buffers. */
809: buffer_init(&stdin_buffer);
810: buffer_init(&stdout_buffer);
811: buffer_init(&stderr_buffer);
812:
1.15 markus 813: client_init_dispatch();
814:
1.11 markus 815: /* Set signal handlers to restore non-blocking mode. */
816: signal(SIGINT, signal_handler);
817: signal(SIGQUIT, signal_handler);
818: signal(SIGTERM, signal_handler);
819: signal(SIGPIPE, SIG_IGN);
820: if (have_pty)
821: signal(SIGWINCH, window_change_handler);
822:
823: if (have_pty)
824: enter_raw_mode();
825:
1.48 markus 826: if (compat20) {
827: session_ident = ssh2_chan_id;
1.72 stevesk 828: if (escape_char != SSH_ESCAPECHAR_NONE)
1.48 markus 829: channel_register_filter(session_ident,
830: simple_escape_filter);
1.60 markus 831: if (session_ident != -1)
832: channel_register_cleanup(session_ident,
833: client_channel_closed);
1.48 markus 834: } else {
835: /* Check if we should immediately send eof on stdin. */
1.16 markus 836: client_check_initial_eof_on_stdin();
1.48 markus 837: }
1.30 markus 838:
1.11 markus 839: /* Main loop of the client for the interactive session mode. */
840: while (!quit_pending) {
841:
1.13 markus 842: /* Process buffered packets sent by the server. */
1.11 markus 843: client_process_buffered_input_packets();
844:
1.60 markus 845: if (compat20 && session_closed && !channel_still_open())
846: break;
847:
1.56 markus 848: rekeying = (xxx_kex != NULL && !xxx_kex->done);
1.16 markus 849:
1.56 markus 850: if (rekeying) {
851: debug("rekeying in progress");
852: } else {
853: /*
854: * Make packets of buffered stdin data, and buffer
855: * them for sending to the server.
856: */
857: if (!compat20)
858: client_make_packets_from_stdin_data();
1.11 markus 859:
1.56 markus 860: /*
861: * Make packets from buffered channel data, and
862: * enqueue them for sending to the server.
863: */
864: if (packet_not_very_much_data_to_write())
865: channel_output_poll();
1.11 markus 866:
1.56 markus 867: /*
868: * Check if the window size has changed, and buffer a
869: * message about it to the server if so.
870: */
871: client_check_window_change();
1.11 markus 872:
1.56 markus 873: if (quit_pending)
874: break;
875: }
1.13 markus 876: /*
877: * Wait until we have something to do (something becomes
878: * available on one of the descriptors).
879: */
1.56 markus 880: client_wait_until_can_do_something(&readset, &writeset,
881: &max_fd, rekeying);
1.11 markus 882:
883: if (quit_pending)
884: break;
885:
1.56 markus 886: /* Do channel operations unless rekeying in progress. */
887: if (!rekeying) {
888: channel_after_select(readset, writeset);
889:
890: if (need_rekeying) {
891: debug("user requests rekeying");
892: xxx_kex->done = 0;
893: kex_send_kexinit(xxx_kex);
894: need_rekeying = 0;
895: }
896: }
1.11 markus 897:
1.17 markus 898: /* Buffer input from the connection. */
1.46 markus 899: client_process_net_input(readset);
1.17 markus 900:
901: if (quit_pending)
902: break;
1.11 markus 903:
1.17 markus 904: if (!compat20) {
905: /* Buffer data from stdin */
1.46 markus 906: client_process_input(readset);
1.17 markus 907: /*
908: * Process output to stdout and stderr. Output to
909: * the connection is processed elsewhere (above).
910: */
1.46 markus 911: client_process_output(writeset);
1.17 markus 912: }
1.11 markus 913:
1.13 markus 914: /* Send as much buffered packet data as possible to the sender. */
1.46 markus 915: if (FD_ISSET(connection_out, writeset))
1.11 markus 916: packet_write_poll();
917: }
1.46 markus 918: if (readset)
919: xfree(readset);
920: if (writeset)
921: xfree(writeset);
1.11 markus 922:
923: /* Terminate the session. */
924:
925: /* Stop watching for window change. */
926: if (have_pty)
927: signal(SIGWINCH, SIG_DFL);
928:
1.76 markus 929: channel_free_all();
1.11 markus 930:
1.75 markus 931: if (have_pty)
932: leave_raw_mode();
933:
934: /* restore blocking io */
935: if (!isatty(fileno(stdin)))
936: unset_nonblock(fileno(stdin));
937: if (!isatty(fileno(stdout)))
938: unset_nonblock(fileno(stdout));
939: if (!isatty(fileno(stderr)))
940: unset_nonblock(fileno(stderr));
941:
942: if (received_signal) {
943: if (in_non_blocking_mode) /* XXX */
944: leave_non_blocking();
945: fatal("Killed by signal %d.", received_signal);
946: }
947:
1.13 markus 948: /*
949: * In interactive mode (with pseudo tty) display a message indicating
950: * that the connection has been closed.
951: */
1.11 markus 952: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
953: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
954: buffer_append(&stderr_buffer, buf, strlen(buf));
955: }
1.70 markus 956:
1.11 markus 957: /* Output any buffered data for stdout. */
1.70 markus 958: while (buffer_len(&stdout_buffer) > 0) {
959: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 960: buffer_len(&stdout_buffer));
1.70 markus 961: if (len <= 0) {
1.11 markus 962: error("Write failed flushing stdout buffer.");
1.70 markus 963: break;
964: }
1.11 markus 965: buffer_consume(&stdout_buffer, len);
1.57 markus 966: stdout_bytes += len;
1.11 markus 967: }
968:
969: /* Output any buffered data for stderr. */
1.70 markus 970: while (buffer_len(&stderr_buffer) > 0) {
971: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 972: buffer_len(&stderr_buffer));
1.70 markus 973: if (len <= 0) {
1.11 markus 974: error("Write failed flushing stderr buffer.");
1.70 markus 975: break;
976: }
1.11 markus 977: buffer_consume(&stderr_buffer, len);
1.57 markus 978: stderr_bytes += len;
1.11 markus 979: }
980:
981: /* Clear and free any buffers. */
982: memset(buf, 0, sizeof(buf));
983: buffer_free(&stdin_buffer);
984: buffer_free(&stdout_buffer);
985: buffer_free(&stderr_buffer);
986:
987: /* Report bytes transferred, and transfer rates. */
988: total_time = get_current_time() - start_time;
989: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
990: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
991: if (total_time > 0)
992: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
993: stdin_bytes / total_time, stdout_bytes / total_time,
994: stderr_bytes / total_time);
995:
996: /* Return the exit status of the program. */
997: debug("Exit status %d", exit_status);
998: return exit_status;
1.15 markus 999: }
1000:
1001: /*********/
1002:
1.77 itojun 1003: static void
1.36 markus 1004: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 1005: {
1.42 markus 1006: u_int data_len;
1.15 markus 1007: char *data = packet_get_string(&data_len);
1008: packet_integrity_check(plen, 4 + data_len, type);
1009: buffer_append(&stdout_buffer, data, data_len);
1010: memset(data, 0, data_len);
1011: xfree(data);
1012: }
1.77 itojun 1013: static void
1.36 markus 1014: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 1015: {
1.42 markus 1016: u_int data_len;
1.15 markus 1017: char *data = packet_get_string(&data_len);
1018: packet_integrity_check(plen, 4 + data_len, type);
1019: buffer_append(&stderr_buffer, data, data_len);
1020: memset(data, 0, data_len);
1021: xfree(data);
1022: }
1.77 itojun 1023: static void
1.36 markus 1024: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1025: {
1026: packet_integrity_check(plen, 4, type);
1027: exit_status = packet_get_int();
1028: /* Acknowledge the exit. */
1029: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1030: packet_send();
1031: /*
1032: * Must wait for packet to be sent since we are
1033: * exiting the loop.
1034: */
1035: packet_write_wait();
1036: /* Flag that we want to exit. */
1037: quit_pending = 1;
1038: }
1039:
1.77 itojun 1040: static Channel *
1.40 markus 1041: client_request_forwarded_tcpip(const char *request_type, int rchan)
1042: {
1043: Channel* c = NULL;
1044: char *listen_address, *originator_address;
1045: int listen_port, originator_port;
1.67 markus 1046: int sock;
1.40 markus 1047:
1048: /* Get rest of the packet */
1049: listen_address = packet_get_string(NULL);
1050: listen_port = packet_get_int();
1051: originator_address = packet_get_string(NULL);
1052: originator_port = packet_get_int();
1053: packet_done();
1054:
1055: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1056: listen_address, listen_port, originator_address, originator_port);
1057:
1.80 ! stevesk 1058: sock = channel_connect_by_listen_address(listen_port);
1.67 markus 1059: if (sock < 0) {
1060: xfree(originator_address);
1061: xfree(listen_address);
1062: return NULL;
1063: }
1064: c = channel_new("forwarded-tcpip",
1065: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1066: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1067: xstrdup(originator_address), 1);
1068: if (c == NULL) {
1069: error("client_request_forwarded_tcpip: channel_new failed");
1070: close(sock);
1.40 markus 1071: }
1072: xfree(originator_address);
1073: xfree(listen_address);
1074: return c;
1075: }
1076:
1.77 itojun 1077: static Channel*
1.40 markus 1078: client_request_x11(const char *request_type, int rchan)
1079: {
1080: Channel *c = NULL;
1081: char *originator;
1082: int originator_port;
1.67 markus 1083: int sock;
1.40 markus 1084:
1085: if (!options.forward_x11) {
1086: error("Warning: ssh server tried X11 forwarding.");
1087: error("Warning: this is probably a break in attempt by a malicious server.");
1088: return NULL;
1089: }
1090: originator = packet_get_string(NULL);
1091: if (datafellows & SSH_BUG_X11FWD) {
1092: debug2("buggy server: x11 request w/o originator_port");
1093: originator_port = 0;
1094: } else {
1095: originator_port = packet_get_int();
1096: }
1097: packet_done();
1098: /* XXX check permission */
1.47 markus 1099: debug("client_request_x11: request from %s %d", originator,
1100: originator_port);
1.67 markus 1101: xfree(originator);
1.40 markus 1102: sock = x11_connect_display();
1.67 markus 1103: if (sock < 0)
1104: return NULL;
1105: c = channel_new("x11",
1106: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1107: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1108: xstrdup("x11"), 1);
1109: if (c == NULL) {
1110: error("client_request_x11: channel_new failed");
1111: close(sock);
1.40 markus 1112: }
1113: return c;
1114: }
1115:
1.77 itojun 1116: static Channel*
1.40 markus 1117: client_request_agent(const char *request_type, int rchan)
1118: {
1119: Channel *c = NULL;
1.67 markus 1120: int sock;
1.40 markus 1121:
1122: if (!options.forward_agent) {
1123: error("Warning: ssh server tried agent forwarding.");
1124: error("Warning: this is probably a break in attempt by a malicious server.");
1125: return NULL;
1126: }
1127: sock = ssh_get_authentication_socket();
1.67 markus 1128: if (sock < 0)
1129: return NULL;
1130: c = channel_new("authentication agent connection",
1131: SSH_CHANNEL_OPEN, sock, sock, -1,
1132: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1133: xstrdup("authentication agent connection"), 1);
1134: if (c == NULL) {
1135: error("client_request_agent: channel_new failed");
1136: close(sock);
1.40 markus 1137: }
1138: return c;
1139: }
1140:
1.22 markus 1141: /* XXXX move to generic input handler */
1.77 itojun 1142: static void
1.36 markus 1143: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1144: {
1145: Channel *c = NULL;
1146: char *ctype;
1.42 markus 1147: u_int len;
1.22 markus 1148: int rchan;
1149: int rmaxpack;
1150: int rwindow;
1151:
1152: ctype = packet_get_string(&len);
1153: rchan = packet_get_int();
1154: rwindow = packet_get_int();
1155: rmaxpack = packet_get_int();
1156:
1.24 markus 1157: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1158: ctype, rchan, rwindow, rmaxpack);
1159:
1.40 markus 1160: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1161: c = client_request_forwarded_tcpip(ctype, rchan);
1162: } else if (strcmp(ctype, "x11") == 0) {
1163: c = client_request_x11(ctype, rchan);
1164: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1165: c = client_request_agent(ctype, rchan);
1.22 markus 1166: }
1167: /* XXX duplicate : */
1168: if (c != NULL) {
1169: debug("confirm %s", ctype);
1170: c->remote_id = rchan;
1171: c->remote_window = rwindow;
1172: c->remote_maxpacket = rmaxpack;
1.69 markus 1173: if (c->type != SSH_CHANNEL_CONNECTING) {
1174: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1175: packet_put_int(c->remote_id);
1176: packet_put_int(c->self);
1177: packet_put_int(c->local_window);
1178: packet_put_int(c->local_maxpacket);
1179: packet_send();
1180: }
1.22 markus 1181: } else {
1182: debug("failure %s", ctype);
1183: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1184: packet_put_int(rchan);
1185: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1.66 markus 1186: if (!(datafellows & SSH_BUG_OPENFAILURE)) {
1.69 markus 1187: packet_put_cstring("open failed");
1.66 markus 1188: packet_put_cstring("");
1189: }
1.22 markus 1190: packet_send();
1191: }
1192: xfree(ctype);
1193: }
1.77 itojun 1194: static void
1.48 markus 1195: client_input_channel_req(int type, int plen, void *ctxt)
1196: {
1197: Channel *c = NULL;
1198: int id, reply, success = 0;
1199: char *rtype;
1200:
1201: id = packet_get_int();
1202: rtype = packet_get_string(NULL);
1203: reply = packet_get_char();
1204:
1205: debug("client_input_channel_req: channel %d rtype %s reply %d",
1206: id, rtype, reply);
1207:
1208: if (session_ident == -1) {
1209: error("client_input_channel_req: no channel %d", session_ident);
1210: } else if (id != session_ident) {
1211: error("client_input_channel_req: channel %d: wrong channel: %d",
1212: session_ident, id);
1213: }
1214: c = channel_lookup(id);
1215: if (c == NULL) {
1216: error("client_input_channel_req: channel %d: unknown channel", id);
1217: } else if (strcmp(rtype, "exit-status") == 0) {
1218: success = 1;
1219: exit_status = packet_get_int();
1220: packet_done();
1221: }
1222: if (reply) {
1223: packet_start(success ?
1224: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1225: packet_put_int(c->remote_id);
1226: packet_send();
1227: }
1228: xfree(rtype);
1229: }
1.22 markus 1230:
1.77 itojun 1231: static void
1.49 itojun 1232: client_init_dispatch_20(void)
1.16 markus 1233: {
1.55 markus 1234: dispatch_init(&dispatch_protocol_error);
1.16 markus 1235: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1236: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1237: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1238: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1239: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1240: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1241: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.48 markus 1242: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1243: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1.55 markus 1244:
1245: /* rekeying */
1246: dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
1.16 markus 1247: }
1.77 itojun 1248: static void
1.49 itojun 1249: client_init_dispatch_13(void)
1.15 markus 1250: {
1251: dispatch_init(NULL);
1252: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1253: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1254: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1255: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1256: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1257: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1258: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1259: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1260: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1261:
1262: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1263: &auth_input_open_request : &deny_input_open);
1264: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1265: &x11_input_open : &deny_input_open);
1.15 markus 1266: }
1.77 itojun 1267: static void
1.49 itojun 1268: client_init_dispatch_15(void)
1.15 markus 1269: {
1270: client_init_dispatch_13();
1271: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1272: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1273: }
1.79 stevesk 1274: static void
1.49 itojun 1275: client_init_dispatch(void)
1.15 markus 1276: {
1.16 markus 1277: if (compat20)
1278: client_init_dispatch_20();
1279: else if (compat13)
1.15 markus 1280: client_init_dispatch_13();
1281: else
1282: client_init_dispatch_15();
1.1 deraadt 1283: }
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