Annotation of src/usr.bin/ssh/clientloop.c, Revision 1.26.2.4
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
1.26.2.2 jason 5: * The main loop for the interactive session (client side).
1.20 markus 6: *
1.26.2.2 jason 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".
1.20 markus 12: *
13: *
1.26.2.2 jason 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.
35: *
1.20 markus 36: *
1.16 markus 37: * SSH2 support added by Markus Friedl.
1.26.2.2 jason 38: * Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
39: *
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"
1.26.2.4! jason 62: RCSID("$OpenBSD: clientloop.c,v 1.53 2001/03/06 01:08:27 millert Exp $");
1.1 deraadt 63:
64: #include "ssh.h"
1.26.2.3 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"
1.26.2.1 jason 73: #include "buffer.h"
74: #include "bufaux.h"
1.26.2.3 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"
1.26.2.2 jason 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. */
1.26.2.1 jason 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. */
1.26.2.3 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
1.26.2.3 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
1.26.2.3 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
1.26.2.3 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
1.26.2.3 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
1.26.2.3 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
1.26.2.3 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: */
1.26.2.3 jason 280: if ((u_char) buf[0] == escape_char)
1.11 markus 281: escape_pending = 1;
1.26.2.4! jason 282: else
1.11 markus 283: buffer_append(&stdin_buffer, buf, 1);
284: }
285: leave_non_blocking();
286: }
1.1 deraadt 287: }
288:
289:
1.13 markus 290: /*
291: * Make packets from buffered stdin data, and buffer them for sending to the
292: * connection.
293: */
1.1 deraadt 294:
1.20 markus 295: void
1.26.2.3 jason 296: client_make_packets_from_stdin_data(void)
1.1 deraadt 297: {
1.26.2.3 jason 298: u_int len;
1.1 deraadt 299:
1.11 markus 300: /* Send buffered stdin data to the server. */
301: while (buffer_len(&stdin_buffer) > 0 &&
302: packet_not_very_much_data_to_write()) {
303: len = buffer_len(&stdin_buffer);
304: /* Keep the packets at reasonable size. */
305: if (len > packet_get_maxsize())
306: len = packet_get_maxsize();
307: packet_start(SSH_CMSG_STDIN_DATA);
308: packet_put_string(buffer_ptr(&stdin_buffer), len);
309: packet_send();
310: buffer_consume(&stdin_buffer, len);
1.26.2.4! jason 311: stdin_bytes += len;
1.11 markus 312: /* If we have a pending EOF, send it now. */
313: if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
314: packet_start(SSH_CMSG_EOF);
315: packet_send();
316: }
1.1 deraadt 317: }
318: }
319:
1.13 markus 320: /*
321: * Checks if the client window has changed, and sends a packet about it to
322: * the server if so. The actual change is detected elsewhere (by a software
323: * interrupt on Unix); this just checks the flag and sends a message if
324: * appropriate.
325: */
1.1 deraadt 326:
1.20 markus 327: void
1.26.2.3 jason 328: client_check_window_change(void)
1.1 deraadt 329: {
1.16 markus 330: struct winsize ws;
331:
332: if (! received_window_change_signal)
333: return;
334: /** XXX race */
335: received_window_change_signal = 0;
336:
337: if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
338: return;
339:
1.26.2.2 jason 340: debug2("client_check_window_change: changed");
1.16 markus 341:
342: if (compat20) {
343: channel_request_start(session_ident, "window-change", 0);
344: packet_put_int(ws.ws_col);
345: packet_put_int(ws.ws_row);
346: packet_put_int(ws.ws_xpixel);
347: packet_put_int(ws.ws_ypixel);
348: packet_send();
349: } else {
350: packet_start(SSH_CMSG_WINDOW_SIZE);
351: packet_put_int(ws.ws_row);
352: packet_put_int(ws.ws_col);
353: packet_put_int(ws.ws_xpixel);
354: packet_put_int(ws.ws_ypixel);
355: packet_send();
1.1 deraadt 356: }
357: }
358:
1.13 markus 359: /*
360: * Waits until the client can do something (some data becomes available on
361: * one of the file descriptors).
362: */
1.1 deraadt 363:
1.20 markus 364: void
1.26.2.3 jason 365: client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
366: int *maxfdp)
1.11 markus 367: {
1.26.2.3 jason 368: /* Add any selections by the channel mechanism. */
369: channel_prepare_select(readsetp, writesetp, maxfdp);
1.11 markus 370:
1.16 markus 371: if (!compat20) {
1.17 markus 372: /* Read from the connection, unless our buffers are full. */
1.16 markus 373: if (buffer_len(&stdout_buffer) < buffer_high &&
374: buffer_len(&stderr_buffer) < buffer_high &&
375: channel_not_very_much_buffered_data())
1.26.2.3 jason 376: FD_SET(connection_in, *readsetp);
1.17 markus 377: /*
378: * Read from stdin, unless we have seen EOF or have very much
379: * buffered data to send to the server.
380: */
381: if (!stdin_eof && packet_not_very_much_data_to_write())
1.26.2.3 jason 382: FD_SET(fileno(stdin), *readsetp);
1.17 markus 383:
384: /* Select stdout/stderr if have data in buffer. */
385: if (buffer_len(&stdout_buffer) > 0)
1.26.2.3 jason 386: FD_SET(fileno(stdout), *writesetp);
1.17 markus 387: if (buffer_len(&stderr_buffer) > 0)
1.26.2.3 jason 388: FD_SET(fileno(stderr), *writesetp);
1.16 markus 389: } else {
1.26.2.3 jason 390: FD_SET(connection_in, *readsetp);
1.16 markus 391: }
1.11 markus 392:
393: /* Select server connection if have data to write to the server. */
394: if (packet_have_data_to_write())
1.26.2.3 jason 395: FD_SET(connection_out, *writesetp);
1.11 markus 396:
1.13 markus 397: /*
398: * Wait for something to happen. This will suspend the process until
399: * some selected descriptor can be read, written, or has some other
400: * event pending. Note: if you want to implement SSH_MSG_IGNORE
401: * messages to fool traffic analysis, this might be the place to do
402: * it: just have a random timeout for the select, and send a random
403: * SSH_MSG_IGNORE packet when the timeout expires.
404: */
1.11 markus 405:
1.26.2.3 jason 406: if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
1.11 markus 407: char buf[100];
1.26.2.3 jason 408:
409: /*
410: * We have to clear the select masks, because we return.
411: * We have to return, because the mainloop checks for the flags
412: * set by the signal handlers.
413: */
414: memset(*readsetp, 0, *maxfdp);
415: memset(*writesetp, 0, *maxfdp);
416:
1.11 markus 417: if (errno == EINTR)
418: return;
419: /* Note: we might still have data in the buffers. */
420: snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
421: buffer_append(&stderr_buffer, buf, strlen(buf));
422: quit_pending = 1;
423: }
424: }
425:
1.20 markus 426: void
1.26.2.1 jason 427: client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
1.1 deraadt 428: {
1.11 markus 429: struct winsize oldws, newws;
430:
431: /* Flush stdout and stderr buffers. */
1.26.2.1 jason 432: if (buffer_len(bout) > 0)
433: atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
434: if (buffer_len(berr) > 0)
435: atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
1.11 markus 436:
437: leave_raw_mode();
438:
1.13 markus 439: /*
440: * Free (and clear) the buffer to reduce the amount of data that gets
441: * written to swap.
442: */
1.26.2.1 jason 443: buffer_free(bin);
444: buffer_free(bout);
445: buffer_free(berr);
1.11 markus 446:
447: /* Save old window size. */
448: ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
449:
450: /* Send the suspend signal to the program itself. */
451: kill(getpid(), SIGTSTP);
452:
453: /* Check if the window size has changed. */
454: if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
455: (oldws.ws_row != newws.ws_row ||
456: oldws.ws_col != newws.ws_col ||
457: oldws.ws_xpixel != newws.ws_xpixel ||
458: oldws.ws_ypixel != newws.ws_ypixel))
459: received_window_change_signal = 1;
460:
461: /* OK, we have been continued by the user. Reinitialize buffers. */
1.26.2.1 jason 462: buffer_init(bin);
463: buffer_init(bout);
464: buffer_init(berr);
1.11 markus 465:
466: enter_raw_mode();
467: }
468:
1.20 markus 469: void
1.17 markus 470: client_process_net_input(fd_set * readset)
1.11 markus 471: {
1.17 markus 472: int len;
473: char buf[8192];
1.11 markus 474:
1.13 markus 475: /*
476: * Read input from the server, and add any such data to the buffer of
477: * the packet subsystem.
478: */
1.11 markus 479: if (FD_ISSET(connection_in, readset)) {
480: /* Read as much as possible. */
481: len = read(connection_in, buf, sizeof(buf));
482: if (len == 0) {
483: /* Received EOF. The remote host has closed the connection. */
484: snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
485: host);
1.1 deraadt 486: buffer_append(&stderr_buffer, buf, strlen(buf));
487: quit_pending = 1;
488: return;
1.11 markus 489: }
1.13 markus 490: /*
491: * There is a kernel bug on Solaris that causes select to
492: * sometimes wake up even though there is no data available.
493: */
1.26.2.4! jason 494: if (len < 0 && (errno == EAGAIN || errno == EINTR))
1.11 markus 495: len = 0;
496:
497: if (len < 0) {
498: /* An error has encountered. Perhaps there is a network problem. */
499: snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
500: host, strerror(errno));
501: buffer_append(&stderr_buffer, buf, strlen(buf));
502: quit_pending = 1;
503: return;
504: }
505: packet_process_incoming(buf, len);
506: }
1.17 markus 507: }
1.16 markus 508:
1.26.2.1 jason 509: /* process the characters one by one */
510: int
511: process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
512: {
513: char string[1024];
514: pid_t pid;
515: int bytes = 0;
1.26.2.3 jason 516: u_int i;
517: u_char ch;
1.26.2.1 jason 518: char *s;
519:
520: for (i = 0; i < len; i++) {
521: /* Get one character at a time. */
522: ch = buf[i];
523:
524: if (escape_pending) {
525: /* We have previously seen an escape character. */
526: /* Clear the flag now. */
527: escape_pending = 0;
528:
529: /* Process the escaped character. */
530: switch (ch) {
531: case '.':
532: /* Terminate the connection. */
533: snprintf(string, sizeof string, "%c.\r\n", escape_char);
534: buffer_append(berr, string, strlen(string));
535:
536: quit_pending = 1;
537: return -1;
538:
539: case 'Z' - 64:
540: /* Suspend the program. */
541: /* Print a message to that effect to the user. */
542: snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
543: buffer_append(berr, string, strlen(string));
544:
545: /* Restore terminal modes and suspend. */
546: client_suspend_self(bin, bout, berr);
547:
548: /* We have been continued. */
549: continue;
550:
551: case '&':
552: /* XXX does not work yet with proto 2 */
553: if (compat20)
554: continue;
555: /*
556: * Detach the program (continue to serve connections,
557: * but put in background and no more new connections).
558: */
559: if (!stdin_eof) {
560: /*
561: * Sending SSH_CMSG_EOF alone does not always appear
562: * to be enough. So we try to send an EOF character
563: * first.
564: */
565: packet_start(SSH_CMSG_STDIN_DATA);
566: packet_put_string("\004", 1);
567: packet_send();
568: /* Close stdin. */
569: stdin_eof = 1;
570: if (buffer_len(bin) == 0) {
571: packet_start(SSH_CMSG_EOF);
572: packet_send();
573: }
574: }
575: /* Restore tty modes. */
576: leave_raw_mode();
577:
578: /* Stop listening for new connections. */
579: channel_stop_listening();
580:
581: printf("%c& [backgrounded]\n", escape_char);
582:
583: /* Fork into background. */
584: pid = fork();
585: if (pid < 0) {
586: error("fork: %.100s", strerror(errno));
587: continue;
588: }
589: if (pid != 0) { /* This is the parent. */
590: /* The parent just exits. */
591: exit(0);
592: }
593: /* The child continues serving connections. */
594: continue; /*XXX ? */
595:
596: case '?':
597: snprintf(string, sizeof string,
598: "%c?\r\n\
599: Supported escape sequences:\r\n\
600: ~. - terminate connection\r\n\
601: ~^Z - suspend ssh\r\n\
602: ~# - list forwarded connections\r\n\
603: ~& - background ssh (when waiting for connections to terminate)\r\n\
604: ~? - this message\r\n\
605: ~~ - send the escape character by typing it twice\r\n\
606: (Note that escapes are only recognized immediately after newline.)\r\n",
607: escape_char);
608: buffer_append(berr, string, strlen(string));
609: continue;
610:
611: case '#':
612: snprintf(string, sizeof string, "%c#\r\n", escape_char);
613: buffer_append(berr, string, strlen(string));
614: s = channel_open_message();
615: buffer_append(berr, s, strlen(s));
616: xfree(s);
617: continue;
618:
619: default:
620: if (ch != escape_char) {
621: buffer_put_char(bin, escape_char);
622: bytes++;
623: }
624: /* Escaped characters fall through here */
625: break;
626: }
627: } else {
628: /*
629: * The previous character was not an escape char. Check if this
630: * is an escape.
631: */
632: if (last_was_cr && ch == escape_char) {
633: /* It is. Set the flag and continue to next character. */
634: escape_pending = 1;
635: continue;
636: }
637: }
638:
639: /*
640: * Normal character. Record whether it was a newline,
641: * and append it to the buffer.
642: */
643: last_was_cr = (ch == '\r' || ch == '\n');
644: buffer_put_char(bin, ch);
645: bytes++;
646: }
647: return bytes;
648: }
649:
1.20 markus 650: void
1.17 markus 651: client_process_input(fd_set * readset)
652: {
1.21 deraadt 653: int len;
1.26.2.1 jason 654: char buf[8192];
1.16 markus 655:
1.11 markus 656: /* Read input from stdin. */
657: if (FD_ISSET(fileno(stdin), readset)) {
658: /* Read as much as possible. */
659: len = read(fileno(stdin), buf, sizeof(buf));
660: if (len <= 0) {
1.13 markus 661: /*
662: * Received EOF or error. They are treated
663: * similarly, except that an error message is printed
664: * if it was an error condition.
665: */
1.11 markus 666: if (len < 0) {
667: snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
668: buffer_append(&stderr_buffer, buf, strlen(buf));
669: }
670: /* Mark that we have seen EOF. */
671: stdin_eof = 1;
1.13 markus 672: /*
673: * Send an EOF message to the server unless there is
674: * data in the buffer. If there is data in the
675: * buffer, no message will be sent now. Code
676: * elsewhere will send the EOF when the buffer
677: * becomes empty if stdin_eof is set.
678: */
1.11 markus 679: if (buffer_len(&stdin_buffer) == 0) {
1.1 deraadt 680: packet_start(SSH_CMSG_EOF);
681: packet_send();
1.11 markus 682: }
683: } else if (escape_char == -1) {
1.13 markus 684: /*
685: * Normal successful read, and no escape character.
686: * Just append the data to buffer.
687: */
1.11 markus 688: buffer_append(&stdin_buffer, buf, len);
689: } else {
1.13 markus 690: /*
691: * Normal, successful read. But we have an escape character
692: * and have to process the characters one by one.
693: */
1.26.2.4! jason 694: if (process_escapes(&stdin_buffer, &stdout_buffer,
! 695: &stderr_buffer, buf, len) == -1)
1.26.2.1 jason 696: return;
1.11 markus 697: }
698: }
699: }
700:
1.20 markus 701: void
1.11 markus 702: client_process_output(fd_set * writeset)
703: {
704: int len;
705: char buf[100];
1.1 deraadt 706:
1.11 markus 707: /* Write buffered output to stdout. */
708: if (FD_ISSET(fileno(stdout), writeset)) {
709: /* Write as much data as possible. */
710: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 711: buffer_len(&stdout_buffer));
1.11 markus 712: if (len <= 0) {
713: if (errno == EAGAIN)
714: len = 0;
715: else {
1.13 markus 716: /*
717: * An error or EOF was encountered. Put an
718: * error message to stderr buffer.
719: */
1.11 markus 720: snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
721: buffer_append(&stderr_buffer, buf, strlen(buf));
722: quit_pending = 1;
723: return;
724: }
725: }
726: /* Consume printed data from the buffer. */
727: buffer_consume(&stdout_buffer, len);
1.26.2.4! jason 728: stdout_bytes += len;
1.11 markus 729: }
730: /* Write buffered output to stderr. */
731: if (FD_ISSET(fileno(stderr), writeset)) {
732: /* Write as much data as possible. */
733: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 734: buffer_len(&stderr_buffer));
1.11 markus 735: if (len <= 0) {
736: if (errno == EAGAIN)
737: len = 0;
738: else {
1.13 markus 739: /* EOF or error, but can't even print error message. */
1.11 markus 740: quit_pending = 1;
741: return;
742: }
743: }
744: /* Consume printed characters from the buffer. */
745: buffer_consume(&stderr_buffer, len);
1.26.2.4! jason 746: stderr_bytes += len;
1.11 markus 747: }
1.1 deraadt 748: }
749:
1.13 markus 750: /*
1.15 markus 751: * Get packets from the connection input buffer, and process them as long as
752: * there are packets available.
753: *
754: * Any unknown packets received during the actual
755: * session cause the session to terminate. This is
756: * intended to make debugging easier since no
757: * confirmations are sent. Any compatible protocol
758: * extensions must be negotiated during the
759: * preparatory phase.
760: */
761:
1.20 markus 762: void
1.26.2.3 jason 763: client_process_buffered_input_packets(void)
1.15 markus 764: {
1.26.2.2 jason 765: dispatch_run(DISPATCH_NONBLOCK, &quit_pending, NULL);
1.15 markus 766: }
767:
1.26.2.1 jason 768: /* scan buf[] for '~' before sending data to the peer */
769:
770: int
771: simple_escape_filter(Channel *c, char *buf, int len)
772: {
773: /* XXX we assume c->extended is writeable */
774: return process_escapes(&c->input, &c->output, &c->extended, buf, len);
775: }
776:
1.15 markus 777: /*
1.13 markus 778: * Implements the interactive session with the server. This is called after
779: * the user has been authenticated, and a command has been started on the
780: * remote host. If escape_char != -1, it is the character used as an escape
781: * character for terminating or suspending the session.
782: */
1.1 deraadt 783:
1.20 markus 784: int
1.26.2.1 jason 785: client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
1.1 deraadt 786: {
1.26.2.3 jason 787: fd_set *readset = NULL, *writeset = NULL;
788: int max_fd = 0;
1.11 markus 789: double start_time, total_time;
790: int len;
791: char buf[100];
792:
793: debug("Entering interactive session.");
794:
795: start_time = get_current_time();
796:
797: /* Initialize variables. */
798: escape_pending = 0;
799: last_was_cr = 1;
800: exit_status = -1;
801: stdin_eof = 0;
802: buffer_high = 64 * 1024;
803: connection_in = packet_get_connection_in();
804: connection_out = packet_get_connection_out();
1.26.2.3 jason 805: max_fd = MAX(connection_in, connection_out);
806:
807: if (!compat20) {
808: max_fd = MAX(max_fd, fileno(stdin));
809: max_fd = MAX(max_fd, fileno(stdout));
810: max_fd = MAX(max_fd, fileno(stderr));
811: }
1.11 markus 812: stdin_bytes = 0;
813: stdout_bytes = 0;
814: stderr_bytes = 0;
815: quit_pending = 0;
816: escape_char = escape_char_arg;
817:
818: /* Initialize buffers. */
819: buffer_init(&stdin_buffer);
820: buffer_init(&stdout_buffer);
821: buffer_init(&stderr_buffer);
822:
1.15 markus 823: client_init_dispatch();
824:
1.11 markus 825: /* Set signal handlers to restore non-blocking mode. */
826: signal(SIGINT, signal_handler);
827: signal(SIGQUIT, signal_handler);
828: signal(SIGTERM, signal_handler);
829: signal(SIGPIPE, SIG_IGN);
830: if (have_pty)
831: signal(SIGWINCH, window_change_handler);
832:
833: if (have_pty)
834: enter_raw_mode();
835:
1.26.2.3 jason 836: if (compat20) {
837: session_ident = ssh2_chan_id;
838: if (escape_char != -1)
839: channel_register_filter(session_ident,
840: simple_escape_filter);
841: } else {
842: /* Check if we should immediately send eof on stdin. */
1.16 markus 843: client_check_initial_eof_on_stdin();
1.26.2.3 jason 844: }
1.26.2.1 jason 845:
1.11 markus 846: /* Main loop of the client for the interactive session mode. */
847: while (!quit_pending) {
848:
1.13 markus 849: /* Process buffered packets sent by the server. */
1.11 markus 850: client_process_buffered_input_packets();
851:
1.16 markus 852: if (compat20 && !channel_still_open()) {
1.26.2.2 jason 853: debug2("!channel_still_open.");
1.16 markus 854: break;
855: }
856:
1.13 markus 857: /*
858: * Make packets of buffered stdin data, and buffer them for
859: * sending to the server.
860: */
1.17 markus 861: if (!compat20)
1.16 markus 862: client_make_packets_from_stdin_data();
1.11 markus 863:
1.13 markus 864: /*
1.26.2.3 jason 865: * Make packets from buffered channel data, and enqueue them
1.13 markus 866: * for sending to the server.
867: */
1.11 markus 868: if (packet_not_very_much_data_to_write())
869: channel_output_poll();
870:
1.13 markus 871: /*
872: * Check if the window size has changed, and buffer a message
873: * about it to the server if so.
874: */
1.11 markus 875: client_check_window_change();
876:
877: if (quit_pending)
878: break;
879:
1.13 markus 880: /*
881: * Wait until we have something to do (something becomes
882: * available on one of the descriptors).
883: */
1.26.2.3 jason 884: client_wait_until_can_do_something(&readset, &writeset, &max_fd);
1.11 markus 885:
886: if (quit_pending)
887: break;
888:
889: /* Do channel operations. */
1.26.2.3 jason 890: channel_after_select(readset, writeset);
1.11 markus 891:
1.17 markus 892: /* Buffer input from the connection. */
1.26.2.3 jason 893: client_process_net_input(readset);
1.17 markus 894:
895: if (quit_pending)
896: break;
1.11 markus 897:
1.17 markus 898: if (!compat20) {
899: /* Buffer data from stdin */
1.26.2.3 jason 900: client_process_input(readset);
1.17 markus 901: /*
902: * Process output to stdout and stderr. Output to
903: * the connection is processed elsewhere (above).
904: */
1.26.2.3 jason 905: client_process_output(writeset);
1.17 markus 906: }
1.11 markus 907:
1.13 markus 908: /* Send as much buffered packet data as possible to the sender. */
1.26.2.3 jason 909: if (FD_ISSET(connection_out, writeset))
1.11 markus 910: packet_write_poll();
911: }
1.26.2.3 jason 912: if (readset)
913: xfree(readset);
914: if (writeset)
915: xfree(writeset);
1.11 markus 916:
917: /* Terminate the session. */
918:
919: /* Stop watching for window change. */
920: if (have_pty)
921: signal(SIGWINCH, SIG_DFL);
922:
923: /* Stop listening for connections. */
924: channel_stop_listening();
925:
1.13 markus 926: /*
927: * In interactive mode (with pseudo tty) display a message indicating
928: * that the connection has been closed.
929: */
1.11 markus 930: if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
931: snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
932: buffer_append(&stderr_buffer, buf, strlen(buf));
933: }
934: /* Output any buffered data for stdout. */
935: while (buffer_len(&stdout_buffer) > 0) {
936: len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
1.14 deraadt 937: buffer_len(&stdout_buffer));
1.11 markus 938: if (len <= 0) {
939: error("Write failed flushing stdout buffer.");
940: break;
941: }
942: buffer_consume(&stdout_buffer, len);
1.26.2.4! jason 943: stdout_bytes += len;
1.11 markus 944: }
945:
946: /* Output any buffered data for stderr. */
947: while (buffer_len(&stderr_buffer) > 0) {
948: len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
1.14 deraadt 949: buffer_len(&stderr_buffer));
1.11 markus 950: if (len <= 0) {
951: error("Write failed flushing stderr buffer.");
952: break;
953: }
954: buffer_consume(&stderr_buffer, len);
1.26.2.4! jason 955: stderr_bytes += len;
1.11 markus 956: }
957:
958: if (have_pty)
959: leave_raw_mode();
960:
961: /* Clear and free any buffers. */
962: memset(buf, 0, sizeof(buf));
963: buffer_free(&stdin_buffer);
964: buffer_free(&stdout_buffer);
965: buffer_free(&stderr_buffer);
966:
967: /* Report bytes transferred, and transfer rates. */
968: total_time = get_current_time() - start_time;
969: debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
970: stdin_bytes, stdout_bytes, stderr_bytes, total_time);
971: if (total_time > 0)
972: debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
973: stdin_bytes / total_time, stdout_bytes / total_time,
974: stderr_bytes / total_time);
975:
976: /* Return the exit status of the program. */
977: debug("Exit status %d", exit_status);
978: return exit_status;
1.15 markus 979: }
980:
981: /*********/
982:
983: void
1.26.2.2 jason 984: client_input_stdout_data(int type, int plen, void *ctxt)
1.15 markus 985: {
1.26.2.3 jason 986: u_int data_len;
1.15 markus 987: char *data = packet_get_string(&data_len);
988: packet_integrity_check(plen, 4 + data_len, type);
989: buffer_append(&stdout_buffer, data, data_len);
990: memset(data, 0, data_len);
991: xfree(data);
992: }
993: void
1.26.2.2 jason 994: client_input_stderr_data(int type, int plen, void *ctxt)
1.15 markus 995: {
1.26.2.3 jason 996: u_int data_len;
1.15 markus 997: char *data = packet_get_string(&data_len);
998: packet_integrity_check(plen, 4 + data_len, type);
999: buffer_append(&stderr_buffer, data, data_len);
1000: memset(data, 0, data_len);
1001: xfree(data);
1002: }
1003: void
1.26.2.2 jason 1004: client_input_exit_status(int type, int plen, void *ctxt)
1.15 markus 1005: {
1006: packet_integrity_check(plen, 4, type);
1007: exit_status = packet_get_int();
1008: /* Acknowledge the exit. */
1009: packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1010: packet_send();
1011: /*
1012: * Must wait for packet to be sent since we are
1013: * exiting the loop.
1014: */
1015: packet_write_wait();
1016: /* Flag that we want to exit. */
1017: quit_pending = 1;
1018: }
1019:
1.26.2.3 jason 1020: Channel *
1021: client_request_forwarded_tcpip(const char *request_type, int rchan)
1022: {
1023: Channel* c = NULL;
1024: char *listen_address, *originator_address;
1025: int listen_port, originator_port;
1026: int sock, newch;
1027:
1028: /* Get rest of the packet */
1029: listen_address = packet_get_string(NULL);
1030: listen_port = packet_get_int();
1031: originator_address = packet_get_string(NULL);
1032: originator_port = packet_get_int();
1033: packet_done();
1034:
1035: debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1036: listen_address, listen_port, originator_address, originator_port);
1037:
1038: sock = channel_connect_by_listen_adress(listen_port);
1039: if (sock >= 0) {
1040: newch = channel_new("forwarded-tcpip",
1041: SSH_CHANNEL_CONNECTING, sock, sock, -1,
1042: CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1043: xstrdup(originator_address), 1);
1044: c = channel_lookup(newch);
1045: }
1046: xfree(originator_address);
1047: xfree(listen_address);
1048: return c;
1049: }
1050:
1051: Channel*
1052: client_request_x11(const char *request_type, int rchan)
1053: {
1054: Channel *c = NULL;
1055: char *originator;
1056: int originator_port;
1057: int sock, newch;
1058:
1059: if (!options.forward_x11) {
1060: error("Warning: ssh server tried X11 forwarding.");
1061: error("Warning: this is probably a break in attempt by a malicious server.");
1062: return NULL;
1063: }
1064: originator = packet_get_string(NULL);
1065: if (datafellows & SSH_BUG_X11FWD) {
1066: debug2("buggy server: x11 request w/o originator_port");
1067: originator_port = 0;
1068: } else {
1069: originator_port = packet_get_int();
1070: }
1071: packet_done();
1072: /* XXX check permission */
1073: debug("client_request_x11: request from %s %d", originator,
1074: originator_port);
1075: sock = x11_connect_display();
1076: if (sock >= 0) {
1077: newch = channel_new("x11",
1078: SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1079: CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1080: xstrdup("x11"), 1);
1081: c = channel_lookup(newch);
1082: }
1083: xfree(originator);
1084: return c;
1085: }
1086:
1087: Channel*
1088: client_request_agent(const char *request_type, int rchan)
1089: {
1090: Channel *c = NULL;
1091: int sock, newch;
1092:
1093: if (!options.forward_agent) {
1094: error("Warning: ssh server tried agent forwarding.");
1095: error("Warning: this is probably a break in attempt by a malicious server.");
1096: return NULL;
1097: }
1098: sock = ssh_get_authentication_socket();
1099: if (sock >= 0) {
1100: newch = channel_new("authentication agent connection",
1101: SSH_CHANNEL_OPEN, sock, sock, -1,
1102: CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1103: xstrdup("authentication agent connection"), 1);
1104: c = channel_lookup(newch);
1105: }
1106: return c;
1107: }
1108:
1.22 markus 1109: /* XXXX move to generic input handler */
1110: void
1.26.2.2 jason 1111: client_input_channel_open(int type, int plen, void *ctxt)
1.22 markus 1112: {
1113: Channel *c = NULL;
1114: char *ctype;
1.26.2.3 jason 1115: u_int len;
1.22 markus 1116: int rchan;
1117: int rmaxpack;
1118: int rwindow;
1119:
1120: ctype = packet_get_string(&len);
1121: rchan = packet_get_int();
1122: rwindow = packet_get_int();
1123: rmaxpack = packet_get_int();
1124:
1.24 markus 1125: debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
1.22 markus 1126: ctype, rchan, rwindow, rmaxpack);
1127:
1.26.2.3 jason 1128: if (strcmp(ctype, "forwarded-tcpip") == 0) {
1129: c = client_request_forwarded_tcpip(ctype, rchan);
1130: } else if (strcmp(ctype, "x11") == 0) {
1131: c = client_request_x11(ctype, rchan);
1132: } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1133: c = client_request_agent(ctype, rchan);
1.22 markus 1134: }
1135: /* XXX duplicate : */
1136: if (c != NULL) {
1137: debug("confirm %s", ctype);
1138: c->remote_id = rchan;
1139: c->remote_window = rwindow;
1140: c->remote_maxpacket = rmaxpack;
1141:
1142: packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1143: packet_put_int(c->remote_id);
1144: packet_put_int(c->self);
1145: packet_put_int(c->local_window);
1146: packet_put_int(c->local_maxpacket);
1147: packet_send();
1148: } else {
1149: debug("failure %s", ctype);
1150: packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1151: packet_put_int(rchan);
1152: packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
1153: packet_put_cstring("bla bla");
1154: packet_put_cstring("");
1155: packet_send();
1156: }
1157: xfree(ctype);
1158: }
1.26.2.3 jason 1159: void
1160: client_input_channel_req(int type, int plen, void *ctxt)
1161: {
1162: Channel *c = NULL;
1163: int id, reply, success = 0;
1164: char *rtype;
1165:
1166: id = packet_get_int();
1167: rtype = packet_get_string(NULL);
1168: reply = packet_get_char();
1169:
1170: debug("client_input_channel_req: channel %d rtype %s reply %d",
1171: id, rtype, reply);
1172:
1173: if (session_ident == -1) {
1174: error("client_input_channel_req: no channel %d", session_ident);
1175: } else if (id != session_ident) {
1176: error("client_input_channel_req: channel %d: wrong channel: %d",
1177: session_ident, id);
1178: }
1179: c = channel_lookup(id);
1180: if (c == NULL) {
1181: error("client_input_channel_req: channel %d: unknown channel", id);
1182: } else if (strcmp(rtype, "exit-status") == 0) {
1183: success = 1;
1184: exit_status = packet_get_int();
1185: packet_done();
1186: }
1187: if (reply) {
1188: packet_start(success ?
1189: SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1190: packet_put_int(c->remote_id);
1191: packet_send();
1192: }
1193: xfree(rtype);
1194: }
1.22 markus 1195:
1.20 markus 1196: void
1.26.2.3 jason 1197: client_init_dispatch_20(void)
1.16 markus 1198: {
1199: dispatch_init(&dispatch_protocol_error);
1200: dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1201: dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1202: dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1203: dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
1.22 markus 1204: dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
1.16 markus 1205: dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1206: dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1.26.2.3 jason 1207: dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
1.16 markus 1208: dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
1209: }
1.20 markus 1210: void
1.26.2.3 jason 1211: client_init_dispatch_13(void)
1.15 markus 1212: {
1213: dispatch_init(NULL);
1214: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1215: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1216: dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
1217: dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1218: dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1219: dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
1220: dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1221: dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1222: dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
1.26.2.2 jason 1223:
1224: dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1225: &auth_input_open_request : &deny_input_open);
1226: dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1227: &x11_input_open : &deny_input_open);
1.15 markus 1228: }
1.20 markus 1229: void
1.26.2.3 jason 1230: client_init_dispatch_15(void)
1.15 markus 1231: {
1232: client_init_dispatch_13();
1233: dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1234: dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1235: }
1.20 markus 1236: void
1.26.2.3 jason 1237: client_init_dispatch(void)
1.15 markus 1238: {
1.16 markus 1239: if (compat20)
1240: client_init_dispatch_20();
1241: else if (compat13)
1.15 markus 1242: client_init_dispatch_13();
1243: else
1244: client_init_dispatch_15();
1.1 deraadt 1245: }
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