Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.39.2.2
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"
1.39.2.1 jason 62: RCSID("$OpenBSD: clientloop.c,v 1.51 2001/02/13 21:51:09 markus Exp $");
1.1 deraadt 63:
64: #include "ssh.h"
1.39.2.1 jason 65: #include "ssh1.h"
66: #include "ssh2.h"
67: #include "xmalloc.h"
1.1 deraadt 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"
1.39.2.1 jason 75: #include "key.h"
76: #include "log.h"
77: #include "readconf.h"
78: #include "clientloop.h"
79: #include "authfd.h"
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. */
1.39.2.1 jason 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
1.39.2.1 jason 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
1.39.2.1 jason 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
1.39.2.1 jason 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
1.39.2.1 jason 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
1.39.2.1 jason 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
1.39.2.1 jason 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: */
1.39.2.1 jason 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
1.39.2.1 jason 298: client_make_packets_from_stdin_data(void)
1.1 deraadt 299: {
1.39.2.1 jason 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
1.39.2.1 jason 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
1.39.2.1 jason 366: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
367: int *maxfdp)
1.11 markus 368: {
1.39.2.1 jason 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())
1.39.2.1 jason 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())
1.39.2.1 jason 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)
1.39.2.1 jason 387: FD_SET(fileno(stdout), *writesetp);
1.17 markus 388: if (buffer_len(&stderr_buffer) > 0)
1.39.2.1 jason 389: FD_SET(fileno(stderr), *writesetp);
1.16 markus 390: } else {
1.39.2.1 jason 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())
1.39.2.1 jason 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:
1.39.2.1 jason 407: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 408: char buf[100];
1.39.2.1 jason 409:
410: /*
411: * We have to clear the select masks, because we return.
412: * We have to return, because the mainloop checks for the flags
413: * set by the signal handlers.
414: */
415: memset(*readsetp, 0, *maxfdp);
416: memset(*writesetp, 0, *maxfdp);
417:
1.11 markus 418: if (errno == EINTR)
419: return;
420: /* Note: we might still have data in the buffers. */
421: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
422: buffer_append(&stderr_buffer, buf, strlen(buf));
423: stderr_bytes += strlen(buf);
424: quit_pending = 1;
425: }
426: }
427:
1.20 markus 428: void
1.31 markus 429: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 430: {
1.11 markus 431: struct winsize oldws, newws;
432:
433: /* Flush stdout and stderr buffers. */
1.31 markus 434: if (buffer_len(bout) > 0)
435: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
436: if (buffer_len(berr) > 0)
437: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 438:
439: leave_raw_mode();
440:
1.13 markus 441: /*
442: * Free (and clear) the buffer to reduce the amount of data that gets
443: * written to swap.
444: */
1.31 markus 445: buffer_free(bin);
446: buffer_free(bout);
447: buffer_free(berr);
1.11 markus 448:
449: /* Save old window size. */
450: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
451:
452: /* Send the suspend signal to the program itself. */
453: kill(getpid(), SIGTSTP);
454:
455: /* Check if the window size has changed. */
456: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
457: (oldws.ws_row != newws.ws_row ||
458: oldws.ws_col != newws.ws_col ||
459: oldws.ws_xpixel != newws.ws_xpixel ||
460: oldws.ws_ypixel != newws.ws_ypixel))
461: received_window_change_signal = 1;
462:
463: /* OK, we have been continued by the user. Reinitialize buffers. */
1.31 markus 464: buffer_init(bin);
465: buffer_init(bout);
466: buffer_init(berr);
1.11 markus 467:
468: enter_raw_mode();
469: }
470:
1.20 markus 471: void
1.17 markus 472: client_process_net_input(fd_set * readset)
1.11 markus 473: {
1.17 markus 474: int len;
475: char buf[8192];
1.11 markus 476:
1.13 markus 477: /*
478: * Read input from the server, and add any such data to the buffer of
479: * the packet subsystem.
480: */
1.11 markus 481: if (FD_ISSET(connection_in, readset)) {
482: /* Read as much as possible. */
483: len = read(connection_in, buf, sizeof(buf));
484: if (len == 0) {
485: /* Received EOF. The remote host has closed the connection. */
486: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
487: host);
1.1 deraadt 488: buffer_append(&stderr_buffer, buf, strlen(buf));
489: stderr_bytes += strlen(buf);
490: quit_pending = 1;
491: return;
1.11 markus 492: }
1.13 markus 493: /*
494: * There is a kernel bug on Solaris that causes select to
495: * sometimes wake up even though there is no data available.
496: */
1.11 markus 497: if (len < 0 && errno == EAGAIN)
498: len = 0;
499:
500: if (len < 0) {
501: /* An error has encountered. Perhaps there is a network problem. */
502: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
503: host, strerror(errno));
504: buffer_append(&stderr_buffer, buf, strlen(buf));
505: stderr_bytes += strlen(buf);
506: quit_pending = 1;
507: return;
508: }
509: packet_process_incoming(buf, len);
510: }
1.17 markus 511: }
1.16 markus 512:
1.31 markus 513: /* process the characters one by one */
514: int
515: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
516: {
1.32 markus 517: char string[1024];
1.31 markus 518: pid_t pid;
519: int bytes = 0;
1.39.2.1 jason 520: u_int i;
521: u_char ch;
1.31 markus 522: char *s;
523:
524: for (i = 0; i < len; i++) {
525: /* Get one character at a time. */
526: ch = buf[i];
527:
528: if (escape_pending) {
529: /* We have previously seen an escape character. */
530: /* Clear the flag now. */
531: escape_pending = 0;
532:
533: /* Process the escaped character. */
534: switch (ch) {
535: case '.':
536: /* Terminate the connection. */
1.32 markus 537: snprintf(string, sizeof string, "%c.\r\n", escape_char);
538: buffer_append(berr, string, strlen(string));
539: /*stderr_bytes += strlen(string); XXX*/
1.31 markus 540:
541: quit_pending = 1;
542: return -1;
543:
544: case 'Z' - 64:
545: /* Suspend the program. */
546: /* Print a message to that effect to the user. */
1.32 markus 547: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
548: buffer_append(berr, string, strlen(string));
549: /*stderr_bytes += strlen(string); XXX*/
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:
557: case '&':
558: /* XXX does not work yet with proto 2 */
559: if (compat20)
560: continue;
561: /*
562: * Detach the program (continue to serve connections,
563: * but put in background and no more new connections).
564: */
565: if (!stdin_eof) {
566: /*
567: * Sending SSH_CMSG_EOF alone does not always appear
568: * to be enough. So we try to send an EOF character
569: * first.
570: */
571: packet_start(SSH_CMSG_STDIN_DATA);
572: packet_put_string("\004", 1);
573: packet_send();
574: /* Close stdin. */
575: stdin_eof = 1;
576: if (buffer_len(bin) == 0) {
577: packet_start(SSH_CMSG_EOF);
578: packet_send();
579: }
580: }
581: /* Restore tty modes. */
582: leave_raw_mode();
583:
584: /* Stop listening for new connections. */
585: channel_stop_listening();
586:
587: printf("%c& [backgrounded]\n", escape_char);
588:
589: /* Fork into background. */
590: pid = fork();
591: if (pid < 0) {
592: error("fork: %.100s", strerror(errno));
593: continue;
594: }
595: if (pid != 0) { /* This is the parent. */
596: /* The parent just exits. */
597: exit(0);
598: }
599: /* The child continues serving connections. */
600: continue; /*XXX ? */
601:
602: case '?':
1.32 markus 603: snprintf(string, sizeof string,
1.31 markus 604: "%c?\r\n\
605: Supported escape sequences:\r\n\
606: ~. - terminate connection\r\n\
607: ~^Z - suspend ssh\r\n\
608: ~# - list forwarded connections\r\n\
609: ~& - background ssh (when waiting for connections to terminate)\r\n\
610: ~? - this message\r\n\
611: ~~ - send the escape character by typing it twice\r\n\
612: (Note that escapes are only recognized immediately after newline.)\r\n",
613: escape_char);
1.32 markus 614: buffer_append(berr, string, strlen(string));
1.31 markus 615: continue;
616:
617: case '#':
1.32 markus 618: snprintf(string, sizeof string, "%c#\r\n", escape_char);
619: buffer_append(berr, string, strlen(string));
1.31 markus 620: s = channel_open_message();
621: buffer_append(berr, s, strlen(s));
622: xfree(s);
623: continue;
624:
625: default:
626: if (ch != escape_char) {
627: buffer_put_char(bin, escape_char);
628: bytes++;
629: }
630: /* Escaped characters fall through here */
631: break;
632: }
633: } else {
634: /*
635: * The previous character was not an escape char. Check if this
636: * is an escape.
637: */
638: if (last_was_cr && ch == escape_char) {
639: /* It is. Set the flag and continue to next character. */
640: escape_pending = 1;
641: continue;
642: }
643: }
644:
645: /*
646: * Normal character. Record whether it was a newline,
647: * and append it to the buffer.
648: */
649: last_was_cr = (ch == '\r' || ch == '\n');
650: buffer_put_char(bin, ch);
651: bytes++;
652: }
653: return bytes;
654: }
655:
1.20 markus 656: void
1.17 markus 657: client_process_input(fd_set * readset)
658: {
1.31 markus 659: int ret;
1.21 deraadt 660: int len;
1.31 markus 661: char buf[8192];
1.16 markus 662:
1.11 markus 663: /* Read input from stdin. */
664: if (FD_ISSET(fileno(stdin), readset)) {
665: /* Read as much as possible. */
666: len = read(fileno(stdin), buf, sizeof(buf));
667: if (len <= 0) {
1.13 markus 668: /*
669: * Received EOF or error. They are treated
670: * similarly, except that an error message is printed
671: * if it was an error condition.
672: */
1.11 markus 673: if (len < 0) {
674: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
675: buffer_append(&stderr_buffer, buf, strlen(buf));
676: stderr_bytes += strlen(buf);
677: }
678: /* Mark that we have seen EOF. */
679: stdin_eof = 1;
1.13 markus 680: /*
681: * Send an EOF message to the server unless there is
682: * data in the buffer. If there is data in the
683: * buffer, no message will be sent now. Code
684: * elsewhere will send the EOF when the buffer
685: * becomes empty if stdin_eof is set.
686: */
1.11 markus 687: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 688: packet_start(SSH_CMSG_EOF);
689: packet_send();
1.11 markus 690: }
691: } else if (escape_char == -1) {
1.13 markus 692: /*
693: * Normal successful read, and no escape character.
694: * Just append the data to buffer.
695: */
1.11 markus 696: buffer_append(&stdin_buffer, buf, len);
697: stdin_bytes += len;
698: } else {
1.13 markus 699: /*
700: * Normal, successful read. But we have an escape character
701: * and have to process the characters one by one.
702: */
1.31 markus 703: ret = process_escapes(&stdin_buffer, &stdout_buffer, &stderr_buffer, buf, len);
704: if (ret == -1)
705: return;
706: stdout_bytes += ret;
1.11 markus 707: }
708: }
709: }
710:
1.20 markus 711: void
1.11 markus 712: client_process_output(fd_set * writeset)
713: {
714: int len;
715: char buf[100];
1.1 deraadt 716:
1.11 markus 717: /* Write buffered output to stdout. */
718: if (FD_ISSET(fileno(stdout), writeset)) {
719: /* Write as much data as possible. */
720: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 721: buffer_len(&stdout_buffer));
1.11 markus 722: if (len <= 0) {
723: if (errno == EAGAIN)
724: len = 0;
725: else {
1.13 markus 726: /*
727: * An error or EOF was encountered. Put an
728: * error message to stderr buffer.
729: */
1.11 markus 730: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
731: buffer_append(&stderr_buffer, buf, strlen(buf));
732: stderr_bytes += strlen(buf);
733: quit_pending = 1;
734: return;
735: }
736: }
737: /* Consume printed data from the buffer. */
738: buffer_consume(&stdout_buffer, len);
739: }
740: /* Write buffered output to stderr. */
741: if (FD_ISSET(fileno(stderr), writeset)) {
742: /* Write as much data as possible. */
743: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 744: buffer_len(&stderr_buffer));
1.11 markus 745: if (len <= 0) {
746: if (errno == EAGAIN)
747: len = 0;
748: else {
1.13 markus 749: /* EOF or error, but can't even print error message. */
1.11 markus 750: quit_pending = 1;
751: return;
752: }
753: }
754: /* Consume printed characters from the buffer. */
755: buffer_consume(&stderr_buffer, len);
756: }
1.1 deraadt 757: }
758:
1.13 markus 759: /*
1.15 markus 760: * Get packets from the connection input buffer, and process them as long as
761: * there are packets available.
762: *
763: * Any unknown packets received during the actual
764: * session cause the session to terminate. This is
765: * intended to make debugging easier since no
766: * confirmations are sent. Any compatible protocol
767: * extensions must be negotiated during the
768: * preparatory phase.
769: */
770:
1.20 markus 771: void
1.39.2.1 jason 772: client_process_buffered_input_packets(void)
1.15 markus 773: {
1.36 markus 774: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, NULL);
1.15 markus 775: }
776:
1.31 markus 777: /* scan buf[] for '~' before sending data to the peer */
1.30 markus 778:
779: int
1.31 markus 780: simple_escape_filter(Channel *c, char *buf, int len)
1.30 markus 781: {
1.31 markus 782: /* XXX we assume c->extended is writeable */
783: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
1.30 markus 784: }
785:
1.15 markus 786: /*
1.13 markus 787: * Implements the interactive session with the server. This is called after
788: * the user has been authenticated, and a command has been started on the
789: * remote host. If escape_char != -1, it is the character used as an escape
790: * character for terminating or suspending the session.
791: */
1.1 deraadt 792:
1.20 markus 793: int
1.30 markus 794: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 795: {
1.39.2.1 jason 796: fd_set *readset = NULL, *writeset = NULL;
797: int max_fd = 0;
1.11 markus 798: double start_time, total_time;
799: int len;
800: char buf[100];
801:
802: debug("Entering interactive session.");
803:
804: start_time = get_current_time();
805:
806: /* Initialize variables. */
807: escape_pending = 0;
808: last_was_cr = 1;
809: exit_status = -1;
810: stdin_eof = 0;
811: buffer_high = 64 * 1024;
812: connection_in = packet_get_connection_in();
813: connection_out = packet_get_connection_out();
1.39.2.1 jason 814: max_fd = MAX(connection_in, connection_out);
815:
816: if (!compat20) {
817: max_fd = MAX(max_fd, fileno(stdin));
818: max_fd = MAX(max_fd, fileno(stdout));
819: max_fd = MAX(max_fd, fileno(stderr));
820: }
1.11 markus 821: stdin_bytes = 0;
822: stdout_bytes = 0;
823: stderr_bytes = 0;
824: quit_pending = 0;
825: escape_char = escape_char_arg;
826:
827: /* Initialize buffers. */
828: buffer_init(&stdin_buffer);
829: buffer_init(&stdout_buffer);
830: buffer_init(&stderr_buffer);
831:
1.15 markus 832: client_init_dispatch();
833:
1.11 markus 834: /* Set signal handlers to restore non-blocking mode. */
835: signal(SIGINT, signal_handler);
836: signal(SIGQUIT, signal_handler);
837: signal(SIGTERM, signal_handler);
838: signal(SIGPIPE, SIG_IGN);
839: if (have_pty)
840: signal(SIGWINCH, window_change_handler);
841:
842: if (have_pty)
843: enter_raw_mode();
844:
1.39.2.1 jason 845: if (compat20) {
846: session_ident = ssh2_chan_id;
847: if (escape_char != -1)
848: channel_register_filter(session_ident,
849: simple_escape_filter);
850: } else {
851: /* Check if we should immediately send eof on stdin. */
1.16 markus 852: client_check_initial_eof_on_stdin();
1.39.2.1 jason 853: }
1.30 markus 854:
1.11 markus 855: /* Main loop of the client for the interactive session mode. */
856: while (!quit_pending) {
857:
1.13 markus 858: /* Process buffered packets sent by the server. */
1.11 markus 859: client_process_buffered_input_packets();
860:
1.16 markus 861: if (compat20 && !channel_still_open()) {
1.37 markus 862: debug2("!channel_still_open.");
1.16 markus 863: break;
864: }
865:
1.13 markus 866: /*
867: * Make packets of buffered stdin data, and buffer them for
868: * sending to the server.
869: */
1.17 markus 870: if (!compat20)
1.16 markus 871: client_make_packets_from_stdin_data();
1.11 markus 872:
1.13 markus 873: /*
1.39.2.1 jason 874: * Make packets from buffered channel data, and enqueue them
1.13 markus 875: * for sending to the server.
876: */
1.11 markus 877: if (packet_not_very_much_data_to_write())
878: channel_output_poll();
879:
1.13 markus 880: /*
881: * Check if the window size has changed, and buffer a message
882: * about it to the server if so.
883: */
1.11 markus 884: client_check_window_change();
885:
886: if (quit_pending)
887: break;
888:
1.13 markus 889: /*
890: * Wait until we have something to do (something becomes
891: * available on one of the descriptors).
892: */
1.39.2.1 jason 893: client_wait_until_can_do_something(&readset, &writeset, &max_fd);
1.11 markus 894:
895: if (quit_pending)
896: break;
897:
898: /* Do channel operations. */
1.39.2.1 jason 899: channel_after_select(readset, writeset);
1.11 markus 900:
1.17 markus 901: /* Buffer input from the connection. */
1.39.2.1 jason 902: client_process_net_input(readset);
1.17 markus 903:
904: if (quit_pending)
905: break;
1.11 markus 906:
1.17 markus 907: if (!compat20) {
908: /* Buffer data from stdin */
1.39.2.1 jason 909: client_process_input(readset);
1.17 markus 910: /*
911: * Process output to stdout and stderr. Output to
912: * the connection is processed elsewhere (above).
913: */
1.39.2.1 jason 914: client_process_output(writeset);
1.17 markus 915: }
1.11 markus 916:
1.13 markus 917: /* Send as much buffered packet data as possible to the sender. */
1.39.2.1 jason 918: if (FD_ISSET(connection_out, writeset))
1.11 markus 919: packet_write_poll();
920: }
1.39.2.1 jason 921: if (readset)
922: xfree(readset);
923: if (writeset)
924: xfree(writeset);
1.11 markus 925:
926: /* Terminate the session. */
927:
928: /* Stop watching for window change. */
929: if (have_pty)
930: signal(SIGWINCH, SIG_DFL);
931:
932: /* Stop listening for connections. */
933: channel_stop_listening();
934:
1.13 markus 935: /*
936: * In interactive mode (with pseudo tty) display a message indicating
937: * that the connection has been closed.
938: */
1.11 markus 939: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
940: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
941: buffer_append(&stderr_buffer, buf, strlen(buf));
942: stderr_bytes += strlen(buf);
943: }
944: /* Output any buffered data for stdout. */
945: while (buffer_len(&stdout_buffer) > 0) {
946: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 947: buffer_len(&stdout_buffer));
1.11 markus 948: if (len <= 0) {
949: error("Write failed flushing stdout buffer.");
950: break;
951: }
952: buffer_consume(&stdout_buffer, len);
953: }
954:
955: /* Output any buffered data for stderr. */
956: while (buffer_len(&stderr_buffer) > 0) {
957: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 958: buffer_len(&stderr_buffer));
1.11 markus 959: if (len <= 0) {
960: error("Write failed flushing stderr buffer.");
961: break;
962: }
963: buffer_consume(&stderr_buffer, len);
964: }
965:
966: if (have_pty)
967: leave_raw_mode();
968:
969: /* Clear and free any buffers. */
970: memset(buf, 0, sizeof(buf));
971: buffer_free(&stdin_buffer);
972: buffer_free(&stdout_buffer);
973: buffer_free(&stderr_buffer);
974:
975: /* Report bytes transferred, and transfer rates. */
976: total_time = get_current_time() - start_time;
977: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
978: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
979: if (total_time > 0)
980: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
981: stdin_bytes / total_time, stdout_bytes / total_time,
982: stderr_bytes / total_time);
983:
984: /* Return the exit status of the program. */
985: debug("Exit status %d", exit_status);
986: return exit_status;
1.15 markus 987: }
988:
989: /*********/
990:
991: void
1.36 markus 992: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 993: {
1.39.2.1 jason 994: u_int data_len;
1.15 markus 995: char *data = packet_get_string(&data_len);
996: packet_integrity_check(plen, 4 + data_len, type);
997: buffer_append(&stdout_buffer, data, data_len);
998: stdout_bytes += data_len;
999: memset(data, 0, data_len);
1000: xfree(data);
1001: }
1002: void
1.36 markus 1003: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 1004: {
1.39.2.1 jason 1005: u_int data_len;
1.15 markus 1006: char *data = packet_get_string(&data_len);
1007: packet_integrity_check(plen, 4 + data_len, type);
1008: buffer_append(&stderr_buffer, data, data_len);
1009: stdout_bytes += data_len;
1010: memset(data, 0, data_len);
1011: xfree(data);
1012: }
1013: void
1.36 markus 1014: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1015: {
1016: packet_integrity_check(plen, 4, type);
1017: exit_status = packet_get_int();
1018: /* Acknowledge the exit. */
1019: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1020: packet_send();
1021: /*
1022: * Must wait for packet to be sent since we are
1023: * exiting the loop.
1024: */
1025: packet_write_wait();
1026: /* Flag that we want to exit. */
1027: quit_pending = 1;
1028: }
1029:
1.39.2.1 jason 1030: Channel *
1031: client_request_forwarded_tcpip(const char *request_type, int rchan)
1032: {
1033: Channel* c = NULL;
1034: char *listen_address, *originator_address;
1035: int listen_port, originator_port;
1036: int sock, newch;
1037:
1038: /* Get rest of the packet */
1039: listen_address = packet_get_string(NULL);
1040: listen_port = packet_get_int();
1041: originator_address = packet_get_string(NULL);
1042: originator_port = packet_get_int();
1043: packet_done();
1044:
1045: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1046: listen_address, listen_port, originator_address, originator_port);
1047:
1048: sock = channel_connect_by_listen_adress(listen_port);
1049: if (sock >= 0) {
1050: newch = channel_new("forwarded-tcpip",
1051: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1052: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1053: xstrdup(originator_address), 1);
1054: c = channel_lookup(newch);
1055: }
1056: xfree(originator_address);
1057: xfree(listen_address);
1058: return c;
1059: }
1060:
1061: Channel*
1062: client_request_x11(const char *request_type, int rchan)
1063: {
1064: Channel *c = NULL;
1065: char *originator;
1066: int originator_port;
1067: int sock, newch;
1068:
1069: if (!options.forward_x11) {
1070: error("Warning: ssh server tried X11 forwarding.");
1071: error("Warning: this is probably a break in attempt by a malicious server.");
1072: return NULL;
1073: }
1074: originator = packet_get_string(NULL);
1075: if (datafellows & SSH_BUG_X11FWD) {
1076: debug2("buggy server: x11 request w/o originator_port");
1077: originator_port = 0;
1078: } else {
1079: originator_port = packet_get_int();
1080: }
1081: packet_done();
1082: /* XXX check permission */
1083: debug("client_request_x11: request from %s %d", originator,
1084: originator_port);
1085: sock = x11_connect_display();
1086: if (sock >= 0) {
1087: newch = channel_new("x11",
1088: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1089: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1090: xstrdup("x11"), 1);
1091: c = channel_lookup(newch);
1092: }
1093: xfree(originator);
1094: return c;
1095: }
1096:
1097: Channel*
1098: client_request_agent(const char *request_type, int rchan)
1099: {
1100: Channel *c = NULL;
1101: int sock, newch;
1102:
1103: if (!options.forward_agent) {
1104: error("Warning: ssh server tried agent forwarding.");
1105: error("Warning: this is probably a break in attempt by a malicious server.");
1106: return NULL;
1107: }
1108: sock = ssh_get_authentication_socket();
1109: if (sock >= 0) {
1110: newch = channel_new("authentication agent connection",
1111: SSH_CHANNEL_OPEN, sock, sock, -1,
1112: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1113: xstrdup("authentication agent connection"), 1);
1114: c = channel_lookup(newch);
1115: }
1116: return c;
1117: }
1118:
1.22 markus 1119: /* XXXX move to generic input handler */
1120: void
1.36 markus 1121: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1122: {
1123: Channel *c = NULL;
1124: char *ctype;
1.39.2.1 jason 1125: u_int len;
1.22 markus 1126: int rchan;
1127: int rmaxpack;
1128: int rwindow;
1129:
1130: ctype = packet_get_string(&len);
1131: rchan = packet_get_int();
1132: rwindow = packet_get_int();
1133: rmaxpack = packet_get_int();
1134:
1.24 markus 1135: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1136: ctype, rchan, rwindow, rmaxpack);
1137:
1.39.2.1 jason 1138: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1139: c = client_request_forwarded_tcpip(ctype, rchan);
1140: } else if (strcmp(ctype, "x11") == 0) {
1141: c = client_request_x11(ctype, rchan);
1142: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1143: c = client_request_agent(ctype, rchan);
1.22 markus 1144: }
1145: /* XXX duplicate : */
1146: if (c != NULL) {
1147: debug("confirm %s", ctype);
1148: c->remote_id = rchan;
1149: c->remote_window = rwindow;
1150: c->remote_maxpacket = rmaxpack;
1151:
1152: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1153: packet_put_int(c->remote_id);
1154: packet_put_int(c->self);
1155: packet_put_int(c->local_window);
1156: packet_put_int(c->local_maxpacket);
1157: packet_send();
1158: } else {
1159: debug("failure %s", ctype);
1160: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1161: packet_put_int(rchan);
1162: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1163: packet_put_cstring("bla bla");
1164: packet_put_cstring("");
1165: packet_send();
1166: }
1167: xfree(ctype);
1168: }
1.39.2.1 jason 1169: void
1170: client_input_channel_req(int type, int plen, void *ctxt)
1171: {
1172: Channel *c = NULL;
1173: int id, reply, success = 0;
1174: char *rtype;
1175:
1176: id = packet_get_int();
1177: rtype = packet_get_string(NULL);
1178: reply = packet_get_char();
1179:
1180: debug("client_input_channel_req: channel %d rtype %s reply %d",
1181: id, rtype, reply);
1182:
1183: if (session_ident == -1) {
1184: error("client_input_channel_req: no channel %d", session_ident);
1185: } else if (id != session_ident) {
1186: error("client_input_channel_req: channel %d: wrong channel: %d",
1187: session_ident, id);
1188: }
1189: c = channel_lookup(id);
1190: if (c == NULL) {
1191: error("client_input_channel_req: channel %d: unknown channel", id);
1192: } else if (strcmp(rtype, "exit-status") == 0) {
1193: success = 1;
1194: exit_status = packet_get_int();
1195: packet_done();
1196: }
1197: if (reply) {
1198: packet_start(success ?
1199: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1200: packet_put_int(c->remote_id);
1201: packet_send();
1202: }
1203: xfree(rtype);
1204: }
1.22 markus 1205:
1.20 markus 1206: void
1.39.2.1 jason 1207: client_init_dispatch_20(void)
1.16 markus 1208: {
1209: dispatch_init(&dispatch_protocol_error);
1210: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1211: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1212: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1213: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1214: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1215: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1216: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.39.2.1 jason 1217: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1218: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1219: }
1.20 markus 1220: void
1.39.2.1 jason 1221: client_init_dispatch_13(void)
1.15 markus 1222: {
1223: dispatch_init(NULL);
1224: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1225: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1226: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1227: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1228: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1229: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1230: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1231: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1232: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.39 markus 1233:
1234: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1235: &auth_input_open_request : &deny_input_open);
1236: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1237: &x11_input_open : &deny_input_open);
1.15 markus 1238: }
1.20 markus 1239: void
1.39.2.1 jason 1240: client_init_dispatch_15(void)
1.15 markus 1241: {
1242: client_init_dispatch_13();
1243: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1244: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1245: }
1.20 markus 1246: void
1.39.2.1 jason 1247: client_init_dispatch(void)
1.15 markus 1248: {
1.16 markus 1249: if (compat20)
1250: client_init_dispatch_20();
1251: else if (compat13)
1.15 markus 1252: client_init_dispatch_13();
1253: else
1254: client_init_dispatch_15();
1.1 deraadt 1255: }
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