blob: 65a6682a68e194b7db5c171745316a0a40c8c30c [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
Damien Miller95def091999-11-25 00:26:21 +11003 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * The main loop for the interactive session (client side).
Damien Miller4af51302000-04-16 11:18:38 +10006 *
Damien Millere4340be2000-09-16 13:29:08 +11007 * 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.
35 *
36 *
Damien Miller1383bd82000-04-06 12:32:37 +100037 * SSH2 support added by Markus Friedl.
Ben Lindstrom44697232001-07-04 03:32:30 +000038 * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved.
Damien Millere4340be2000-09-16 13:29:08 +110039 *
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.
Damien Miller95def091999-11-25 00:26:21 +110059 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100060
61#include "includes.h"
Damien Miller699d0032002-02-08 22:07:16 +110062RCSID("$OpenBSD: clientloop.c,v 1.96 2002/02/06 14:55:15 markus Exp $");
Damien Millerd4a8b7e1999-10-27 13:42:43 +100063
Damien Millerd4a8b7e1999-10-27 13:42:43 +100064#include "ssh.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000065#include "ssh1.h"
66#include "ssh2.h"
67#include "xmalloc.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100068#include "packet.h"
69#include "buffer.h"
Damien Millerb38eff82000-04-01 11:09:21 +100070#include "compat.h"
Ben Lindstromc7637672001-06-09 00:36:26 +000071#include "channels.h"
Damien Millerb38eff82000-04-01 11:09:21 +100072#include "dispatch.h"
Damien Millerad833b32000-08-23 10:46:23 +100073#include "buffer.h"
74#include "bufaux.h"
Damien Miller0bc1bd82000-11-13 22:57:25 +110075#include "key.h"
Ben Lindstromf28f6342001-04-04 02:03:04 +000076#include "kex.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000077#include "log.h"
78#include "readconf.h"
Ben Lindstrombf555ba2001-01-18 02:04:35 +000079#include "clientloop.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000080#include "authfd.h"
81#include "atomicio.h"
Ben Lindstromae8e2d32001-04-14 23:13:02 +000082#include "sshtty.h"
Ben Lindstrom302ea6f2001-04-16 02:01:25 +000083#include "misc.h"
Damien Miller69b69aa2000-10-28 14:19:58 +110084
85/* import options */
86extern Options options;
87
Damien Millerd4a8b7e1999-10-27 13:42:43 +100088/* Flag indicating that stdin should be redirected from /dev/null. */
89extern int stdin_null_flag;
90
Damien Miller5428f641999-11-25 11:54:57 +110091/*
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 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100096extern char *host;
97
Damien Miller5428f641999-11-25 11:54:57 +110098/*
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 */
Ben Lindstrom5e71c542001-12-06 16:48:14 +0000104static volatile sig_atomic_t received_window_change_signal = 0;
105static volatile sig_atomic_t received_signal = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000106
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000107/* Flag indicating whether the user\'s terminal is in non-blocking mode. */
108static int in_non_blocking_mode = 0;
109
110/* Common data for the client loop code. */
Damien Millerad833b32000-08-23 10:46:23 +1000111static int quit_pending; /* Set to non-zero to quit the client loop. */
112static int escape_char; /* Escape character. */
Damien Miller95def091999-11-25 00:26:21 +1100113static int escape_pending; /* Last character was the escape character */
114static int last_was_cr; /* Last character was a newline. */
115static int exit_status; /* Used to store the exit status of the command. */
116static int stdin_eof; /* EOF has been encountered on standard error. */
117static Buffer stdin_buffer; /* Buffer for stdin data. */
118static Buffer stdout_buffer; /* Buffer for stdout data. */
119static Buffer stderr_buffer; /* Buffer for stderr data. */
Ben Lindstrom46c16222000-12-22 01:43:59 +0000120static u_long stdin_bytes, stdout_bytes, stderr_bytes;
121static u_int buffer_high;/* Soft max buffer size. */
Damien Miller95def091999-11-25 00:26:21 +1100122static int connection_in; /* Connection to server (input). */
123static int connection_out; /* Connection to server (output). */
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000124static int need_rekeying; /* Set to non-zero if rekeying is requested. */
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000125static int session_closed = 0; /* In SSH2: login session closed. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000126
Ben Lindstrombba81212001-06-25 05:01:22 +0000127static void client_init_dispatch(void);
Damien Miller1383bd82000-04-06 12:32:37 +1000128int session_ident = -1;
129
Ben Lindstromf28f6342001-04-04 02:03:04 +0000130/*XXX*/
131extern Kex *xxx_kex;
132
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000133/* Restores stdin to blocking mode. */
134
Ben Lindstrombba81212001-06-25 05:01:22 +0000135static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000136leave_non_blocking(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000137{
Damien Miller95def091999-11-25 00:26:21 +1100138 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 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000143}
144
Damien Miller95def091999-11-25 00:26:21 +1100145/* Puts stdin terminal in non-blocking mode. */
146
Ben Lindstrombba81212001-06-25 05:01:22 +0000147static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000148enter_non_blocking(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000149{
Damien Miller95def091999-11-25 00:26:21 +1100150 in_non_blocking_mode = 1;
151 (void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
152 fatal_add_cleanup((void (*) (void *)) leave_non_blocking, NULL);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000153}
154
Damien Miller5428f641999-11-25 11:54:57 +1100155/*
156 * Signal handler for the window change signal (SIGWINCH). This just sets a
157 * flag indicating that the window has changed.
158 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000159
Ben Lindstrombba81212001-06-25 05:01:22 +0000160static void
Damien Miller95def091999-11-25 00:26:21 +1100161window_change_handler(int sig)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000162{
Damien Miller95def091999-11-25 00:26:21 +1100163 received_window_change_signal = 1;
164 signal(SIGWINCH, window_change_handler);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000165}
166
Damien Miller5428f641999-11-25 11:54:57 +1100167/*
168 * Signal handler for signals that cause the program to terminate. These
169 * signals must be trapped to restore terminal modes.
170 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000171
Ben Lindstrombba81212001-06-25 05:01:22 +0000172static void
Damien Miller95def091999-11-25 00:26:21 +1100173signal_handler(int sig)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000174{
Ben Lindstromec46e0b2001-06-09 01:27:31 +0000175 received_signal = sig;
176 quit_pending = 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000177}
178
Damien Miller5428f641999-11-25 11:54:57 +1100179/*
180 * Returns current time in seconds from Jan 1, 1970 with the maximum
181 * available resolution.
182 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000183
Ben Lindstrombba81212001-06-25 05:01:22 +0000184static double
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000185get_current_time(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000186{
Damien Miller95def091999-11-25 00:26:21 +1100187 struct timeval tv;
188 gettimeofday(&tv, NULL);
189 return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000190}
191
Damien Miller5428f641999-11-25 11:54:57 +1100192/*
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 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000197
Ben Lindstrombba81212001-06-25 05:01:22 +0000198static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000199client_check_initial_eof_on_stdin(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000200{
Damien Miller95def091999-11-25 00:26:21 +1100201 int len;
202 char buf[1];
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000203
Damien Miller5428f641999-11-25 11:54:57 +1100204 /*
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 */
Damien Miller95def091999-11-25 00:26:21 +1100212 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 {
Damien Miller95def091999-11-25 00:26:21 +1100219 enter_non_blocking();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000220
Damien Miller95def091999-11-25 00:26:21 +1100221 /* Check for immediate EOF on stdin. */
222 len = read(fileno(stdin), buf, 1);
223 if (len == 0) {
Damien Miller5428f641999-11-25 11:54:57 +1100224 /* EOF. Record that we have seen it and send EOF to server. */
Damien Miller95def091999-11-25 00:26:21 +1100225 debug("Sending eof.");
226 stdin_eof = 1;
227 packet_start(SSH_CMSG_EOF);
228 packet_send();
229 } else if (len > 0) {
Damien Miller5428f641999-11-25 11:54:57 +1100230 /*
231 * Got data. We must store the data in the buffer,
232 * and also process it as an escape character if
233 * appropriate.
234 */
Ben Lindstrom46c16222000-12-22 01:43:59 +0000235 if ((u_char) buf[0] == escape_char)
Damien Miller95def091999-11-25 00:26:21 +1100236 escape_pending = 1;
Ben Lindstrome9613cf2001-03-05 06:14:02 +0000237 else
Damien Miller95def091999-11-25 00:26:21 +1100238 buffer_append(&stdin_buffer, buf, 1);
Damien Miller95def091999-11-25 00:26:21 +1100239 }
Damien Miller95def091999-11-25 00:26:21 +1100240 leave_non_blocking();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000241 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000242}
243
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000244
Damien Miller5428f641999-11-25 11:54:57 +1100245/*
246 * Make packets from buffered stdin data, and buffer them for sending to the
247 * connection.
248 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000249
Ben Lindstrombba81212001-06-25 05:01:22 +0000250static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000251client_make_packets_from_stdin_data(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000252{
Ben Lindstrom46c16222000-12-22 01:43:59 +0000253 u_int len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000254
Damien Miller95def091999-11-25 00:26:21 +1100255 /* Send buffered stdin data to the server. */
256 while (buffer_len(&stdin_buffer) > 0 &&
Damien Miller9f0f5c62001-12-21 14:45:46 +1100257 packet_not_very_much_data_to_write()) {
Damien Miller95def091999-11-25 00:26:21 +1100258 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);
Ben Lindstrome9613cf2001-03-05 06:14:02 +0000266 stdin_bytes += len;
Damien Miller95def091999-11-25 00:26:21 +1100267 /* 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 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000272 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000273}
274
Damien Miller5428f641999-11-25 11:54:57 +1100275/*
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 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000281
Ben Lindstrombba81212001-06-25 05:01:22 +0000282static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000283client_check_window_change(void)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000284{
Damien Miller1383bd82000-04-06 12:32:37 +1000285 struct winsize ws;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000286
Damien Miller1383bd82000-04-06 12:32:37 +1000287 if (! received_window_change_signal)
288 return;
289 /** XXX race */
290 received_window_change_signal = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000291
Damien Miller1383bd82000-04-06 12:32:37 +1000292 if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
293 return;
294
Damien Millerd3444942000-09-30 14:20:03 +1100295 debug2("client_check_window_change: changed");
Damien Miller1383bd82000-04-06 12:32:37 +1000296
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();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000311 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000312}
313
Damien Miller5428f641999-11-25 11:54:57 +1100314/*
315 * Waits until the client can do something (some data becomes available on
316 * one of the file descriptors).
317 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000318
Ben Lindstrombba81212001-06-25 05:01:22 +0000319static void
Damien Miller5e953212001-01-30 09:14:00 +1100320client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
Ben Lindstrom16d29d52001-07-18 16:01:46 +0000321 int *maxfdp, int *nallocp, int rekeying)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000322{
Damien Miller5e953212001-01-30 09:14:00 +1100323 /* Add any selections by the channel mechanism. */
Ben Lindstrom16d29d52001-07-18 16:01:46 +0000324 channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000325
Damien Miller1383bd82000-04-06 12:32:37 +1000326 if (!compat20) {
327 /* Read from the connection, unless our buffers are full. */
328 if (buffer_len(&stdout_buffer) < buffer_high &&
329 buffer_len(&stderr_buffer) < buffer_high &&
330 channel_not_very_much_buffered_data())
Damien Miller5e953212001-01-30 09:14:00 +1100331 FD_SET(connection_in, *readsetp);
Damien Miller1383bd82000-04-06 12:32:37 +1000332 /*
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())
Damien Miller5e953212001-01-30 09:14:00 +1100337 FD_SET(fileno(stdin), *readsetp);
Damien Miller1383bd82000-04-06 12:32:37 +1000338
339 /* Select stdout/stderr if have data in buffer. */
340 if (buffer_len(&stdout_buffer) > 0)
Damien Miller5e953212001-01-30 09:14:00 +1100341 FD_SET(fileno(stdout), *writesetp);
Damien Miller1383bd82000-04-06 12:32:37 +1000342 if (buffer_len(&stderr_buffer) > 0)
Damien Miller5e953212001-01-30 09:14:00 +1100343 FD_SET(fileno(stderr), *writesetp);
Damien Miller1383bd82000-04-06 12:32:37 +1000344 } else {
Ben Lindstromc8b3f472001-05-17 03:19:40 +0000345 /* channel_prepare_select could have closed the last channel */
Damien Miller164a7f42001-10-12 11:36:09 +1000346 if (session_closed && !channel_still_open() &&
347 !packet_have_data_to_write()) {
348 /* clear mask since we did not call select() */
Damien Miller79faeff2001-11-12 11:06:32 +1100349 memset(*readsetp, 0, *nallocp);
350 memset(*writesetp, 0, *nallocp);
Damien Miller164a7f42001-10-12 11:36:09 +1000351 return;
Ben Lindstromc8b3f472001-05-17 03:19:40 +0000352 } else {
353 FD_SET(connection_in, *readsetp);
354 }
Damien Miller1383bd82000-04-06 12:32:37 +1000355 }
356
Damien Miller95def091999-11-25 00:26:21 +1100357 /* Select server connection if have data to write to the server. */
358 if (packet_have_data_to_write())
Damien Miller5e953212001-01-30 09:14:00 +1100359 FD_SET(connection_out, *writesetp);
Damien Miller95def091999-11-25 00:26:21 +1100360
Damien Miller5428f641999-11-25 11:54:57 +1100361 /*
362 * Wait for something to happen. This will suspend the process until
363 * some selected descriptor can be read, written, or has some other
364 * event pending. Note: if you want to implement SSH_MSG_IGNORE
365 * messages to fool traffic analysis, this might be the place to do
366 * it: just have a random timeout for the select, and send a random
367 * SSH_MSG_IGNORE packet when the timeout expires.
368 */
Damien Miller95def091999-11-25 00:26:21 +1100369
Damien Miller5e953212001-01-30 09:14:00 +1100370 if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
Damien Miller95def091999-11-25 00:26:21 +1100371 char buf[100];
Ben Lindstromf9452512001-02-15 03:12:08 +0000372
373 /*
374 * We have to clear the select masks, because we return.
375 * We have to return, because the mainloop checks for the flags
376 * set by the signal handlers.
377 */
Damien Miller79faeff2001-11-12 11:06:32 +1100378 memset(*readsetp, 0, *nallocp);
379 memset(*writesetp, 0, *nallocp);
Ben Lindstromf9452512001-02-15 03:12:08 +0000380
Damien Miller95def091999-11-25 00:26:21 +1100381 if (errno == EINTR)
382 return;
383 /* Note: we might still have data in the buffers. */
384 snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
385 buffer_append(&stderr_buffer, buf, strlen(buf));
Damien Miller95def091999-11-25 00:26:21 +1100386 quit_pending = 1;
387 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000388}
389
Ben Lindstrombba81212001-06-25 05:01:22 +0000390static void
Damien Millerad833b32000-08-23 10:46:23 +1000391client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000392{
Damien Miller95def091999-11-25 00:26:21 +1100393 struct winsize oldws, newws;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000394
Damien Miller95def091999-11-25 00:26:21 +1100395 /* Flush stdout and stderr buffers. */
Damien Millerad833b32000-08-23 10:46:23 +1000396 if (buffer_len(bout) > 0)
397 atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
398 if (buffer_len(berr) > 0)
399 atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000400
Damien Miller95def091999-11-25 00:26:21 +1100401 leave_raw_mode();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000402
Damien Miller5428f641999-11-25 11:54:57 +1100403 /*
404 * Free (and clear) the buffer to reduce the amount of data that gets
405 * written to swap.
406 */
Damien Millerad833b32000-08-23 10:46:23 +1000407 buffer_free(bin);
408 buffer_free(bout);
409 buffer_free(berr);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000410
Damien Miller95def091999-11-25 00:26:21 +1100411 /* Save old window size. */
412 ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000413
Damien Miller95def091999-11-25 00:26:21 +1100414 /* Send the suspend signal to the program itself. */
415 kill(getpid(), SIGTSTP);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000416
Damien Miller95def091999-11-25 00:26:21 +1100417 /* Check if the window size has changed. */
418 if (ioctl(fileno(stdin), TIOCGWINSZ, &newws) >= 0 &&
419 (oldws.ws_row != newws.ws_row ||
Damien Miller9f0f5c62001-12-21 14:45:46 +1100420 oldws.ws_col != newws.ws_col ||
421 oldws.ws_xpixel != newws.ws_xpixel ||
422 oldws.ws_ypixel != newws.ws_ypixel))
Damien Miller95def091999-11-25 00:26:21 +1100423 received_window_change_signal = 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000424
Damien Miller95def091999-11-25 00:26:21 +1100425 /* OK, we have been continued by the user. Reinitialize buffers. */
Damien Millerad833b32000-08-23 10:46:23 +1000426 buffer_init(bin);
427 buffer_init(bout);
428 buffer_init(berr);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000429
Damien Miller95def091999-11-25 00:26:21 +1100430 enter_raw_mode();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000431}
432
Ben Lindstrombba81212001-06-25 05:01:22 +0000433static void
Damien Miller1383bd82000-04-06 12:32:37 +1000434client_process_net_input(fd_set * readset)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000435{
Damien Miller1383bd82000-04-06 12:32:37 +1000436 int len;
437 char buf[8192];
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000438
Damien Miller5428f641999-11-25 11:54:57 +1100439 /*
440 * Read input from the server, and add any such data to the buffer of
441 * the packet subsystem.
442 */
Damien Miller95def091999-11-25 00:26:21 +1100443 if (FD_ISSET(connection_in, readset)) {
444 /* Read as much as possible. */
445 len = read(connection_in, buf, sizeof(buf));
446 if (len == 0) {
447 /* Received EOF. The remote host has closed the connection. */
448 snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
449 host);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000450 buffer_append(&stderr_buffer, buf, strlen(buf));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000451 quit_pending = 1;
452 return;
Damien Miller95def091999-11-25 00:26:21 +1100453 }
Damien Miller5428f641999-11-25 11:54:57 +1100454 /*
455 * There is a kernel bug on Solaris that causes select to
456 * sometimes wake up even though there is no data available.
457 */
Ben Lindstromebc88272001-03-06 03:34:40 +0000458 if (len < 0 && (errno == EAGAIN || errno == EINTR))
Damien Miller95def091999-11-25 00:26:21 +1100459 len = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000460
Damien Miller95def091999-11-25 00:26:21 +1100461 if (len < 0) {
462 /* An error has encountered. Perhaps there is a network problem. */
463 snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
464 host, strerror(errno));
465 buffer_append(&stderr_buffer, buf, strlen(buf));
Damien Miller95def091999-11-25 00:26:21 +1100466 quit_pending = 1;
467 return;
468 }
469 packet_process_incoming(buf, len);
470 }
Damien Miller1383bd82000-04-06 12:32:37 +1000471}
472
Damien Millerad833b32000-08-23 10:46:23 +1000473/* process the characters one by one */
Ben Lindstrombba81212001-06-25 05:01:22 +0000474static int
Damien Millerad833b32000-08-23 10:46:23 +1000475process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
476{
477 char string[1024];
478 pid_t pid;
479 int bytes = 0;
Ben Lindstrom46c16222000-12-22 01:43:59 +0000480 u_int i;
481 u_char ch;
Damien Millerad833b32000-08-23 10:46:23 +1000482 char *s;
483
484 for (i = 0; i < len; i++) {
485 /* Get one character at a time. */
486 ch = buf[i];
487
488 if (escape_pending) {
489 /* We have previously seen an escape character. */
490 /* Clear the flag now. */
491 escape_pending = 0;
492
493 /* Process the escaped character. */
494 switch (ch) {
495 case '.':
496 /* Terminate the connection. */
497 snprintf(string, sizeof string, "%c.\r\n", escape_char);
498 buffer_append(berr, string, strlen(string));
Damien Millerad833b32000-08-23 10:46:23 +1000499
500 quit_pending = 1;
501 return -1;
502
503 case 'Z' - 64:
504 /* Suspend the program. */
505 /* Print a message to that effect to the user. */
506 snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
507 buffer_append(berr, string, strlen(string));
Damien Millerad833b32000-08-23 10:46:23 +1000508
509 /* Restore terminal modes and suspend. */
510 client_suspend_self(bin, bout, berr);
511
512 /* We have been continued. */
513 continue;
514
Ben Lindstromf28f6342001-04-04 02:03:04 +0000515 case 'R':
Ben Lindstrom11bd8992001-04-05 23:34:29 +0000516 if (compat20) {
517 if (datafellows & SSH_BUG_NOREKEY)
518 log("Server does not support re-keying");
519 else
520 need_rekeying = 1;
521 }
Ben Lindstromf28f6342001-04-04 02:03:04 +0000522 continue;
523
Damien Millerad833b32000-08-23 10:46:23 +1000524 case '&':
Damien Millerad833b32000-08-23 10:46:23 +1000525 /*
526 * Detach the program (continue to serve connections,
527 * but put in background and no more new connections).
528 */
Damien Miller96507ef2001-11-12 10:52:25 +1100529 /* Restore tty modes. */
530 leave_raw_mode();
531
532 /* Stop listening for new connections. */
533 channel_stop_listening();
534
535 snprintf(string, sizeof string,
536 "%c& [backgrounded]\n", escape_char);
537 buffer_append(berr, string, strlen(string));
538
539 /* Fork into background. */
540 pid = fork();
541 if (pid < 0) {
542 error("fork: %.100s", strerror(errno));
543 continue;
544 }
545 if (pid != 0) { /* This is the parent. */
546 /* The parent just exits. */
547 exit(0);
548 }
549 /* The child continues serving connections. */
550 if (compat20) {
551 buffer_append(bin, "\004", 1);
552 /* fake EOF on stdin */
553 return -1;
554 } else if (!stdin_eof) {
Damien Millerad833b32000-08-23 10:46:23 +1000555 /*
556 * Sending SSH_CMSG_EOF alone does not always appear
557 * to be enough. So we try to send an EOF character
558 * first.
559 */
560 packet_start(SSH_CMSG_STDIN_DATA);
561 packet_put_string("\004", 1);
562 packet_send();
563 /* Close stdin. */
564 stdin_eof = 1;
565 if (buffer_len(bin) == 0) {
566 packet_start(SSH_CMSG_EOF);
567 packet_send();
568 }
569 }
Damien Miller96507ef2001-11-12 10:52:25 +1100570 continue;
Damien Millerad833b32000-08-23 10:46:23 +1000571
572 case '?':
573 snprintf(string, sizeof string,
574"%c?\r\n\
575Supported escape sequences:\r\n\
576~. - terminate connection\r\n\
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000577~R - Request rekey (SSH protocol 2 only)\r\n\
Damien Millerad833b32000-08-23 10:46:23 +1000578~^Z - suspend ssh\r\n\
579~# - list forwarded connections\r\n\
580~& - background ssh (when waiting for connections to terminate)\r\n\
581~? - this message\r\n\
582~~ - send the escape character by typing it twice\r\n\
583(Note that escapes are only recognized immediately after newline.)\r\n",
584 escape_char);
585 buffer_append(berr, string, strlen(string));
586 continue;
587
588 case '#':
589 snprintf(string, sizeof string, "%c#\r\n", escape_char);
590 buffer_append(berr, string, strlen(string));
591 s = channel_open_message();
592 buffer_append(berr, s, strlen(s));
593 xfree(s);
594 continue;
595
596 default:
597 if (ch != escape_char) {
598 buffer_put_char(bin, escape_char);
599 bytes++;
600 }
601 /* Escaped characters fall through here */
602 break;
603 }
604 } else {
605 /*
606 * The previous character was not an escape char. Check if this
607 * is an escape.
608 */
609 if (last_was_cr && ch == escape_char) {
610 /* It is. Set the flag and continue to next character. */
611 escape_pending = 1;
612 continue;
613 }
614 }
615
616 /*
617 * Normal character. Record whether it was a newline,
618 * and append it to the buffer.
619 */
620 last_was_cr = (ch == '\r' || ch == '\n');
621 buffer_put_char(bin, ch);
622 bytes++;
623 }
624 return bytes;
625}
626
Ben Lindstrombba81212001-06-25 05:01:22 +0000627static void
Damien Miller1383bd82000-04-06 12:32:37 +1000628client_process_input(fd_set * readset)
629{
Damien Miller166fca82000-04-20 07:42:21 +1000630 int len;
Damien Millerad833b32000-08-23 10:46:23 +1000631 char buf[8192];
Damien Miller1383bd82000-04-06 12:32:37 +1000632
Damien Miller95def091999-11-25 00:26:21 +1100633 /* Read input from stdin. */
634 if (FD_ISSET(fileno(stdin), readset)) {
635 /* Read as much as possible. */
636 len = read(fileno(stdin), buf, sizeof(buf));
Ben Lindstrom4c8cff12001-04-17 18:09:42 +0000637 if (len < 0 && (errno == EAGAIN || errno == EINTR))
638 return; /* we'll try again later */
Damien Miller95def091999-11-25 00:26:21 +1100639 if (len <= 0) {
Damien Miller5428f641999-11-25 11:54:57 +1100640 /*
641 * Received EOF or error. They are treated
642 * similarly, except that an error message is printed
643 * if it was an error condition.
644 */
Damien Miller95def091999-11-25 00:26:21 +1100645 if (len < 0) {
646 snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
647 buffer_append(&stderr_buffer, buf, strlen(buf));
Damien Miller95def091999-11-25 00:26:21 +1100648 }
649 /* Mark that we have seen EOF. */
650 stdin_eof = 1;
Damien Miller5428f641999-11-25 11:54:57 +1100651 /*
652 * Send an EOF message to the server unless there is
653 * data in the buffer. If there is data in the
654 * buffer, no message will be sent now. Code
655 * elsewhere will send the EOF when the buffer
656 * becomes empty if stdin_eof is set.
657 */
Damien Miller95def091999-11-25 00:26:21 +1100658 if (buffer_len(&stdin_buffer) == 0) {
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000659 packet_start(SSH_CMSG_EOF);
660 packet_send();
Damien Miller95def091999-11-25 00:26:21 +1100661 }
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000662 } else if (escape_char == SSH_ESCAPECHAR_NONE) {
Damien Miller5428f641999-11-25 11:54:57 +1100663 /*
664 * Normal successful read, and no escape character.
665 * Just append the data to buffer.
666 */
Damien Miller95def091999-11-25 00:26:21 +1100667 buffer_append(&stdin_buffer, buf, len);
Damien Miller95def091999-11-25 00:26:21 +1100668 } else {
Damien Miller5428f641999-11-25 11:54:57 +1100669 /*
670 * Normal, successful read. But we have an escape character
671 * and have to process the characters one by one.
672 */
Ben Lindstrome9613cf2001-03-05 06:14:02 +0000673 if (process_escapes(&stdin_buffer, &stdout_buffer,
674 &stderr_buffer, buf, len) == -1)
Damien Millerad833b32000-08-23 10:46:23 +1000675 return;
Damien Miller95def091999-11-25 00:26:21 +1100676 }
677 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000678}
679
Ben Lindstrombba81212001-06-25 05:01:22 +0000680static void
Damien Miller95def091999-11-25 00:26:21 +1100681client_process_output(fd_set * writeset)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000682{
Damien Miller95def091999-11-25 00:26:21 +1100683 int len;
684 char buf[100];
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000685
Damien Miller95def091999-11-25 00:26:21 +1100686 /* Write buffered output to stdout. */
687 if (FD_ISSET(fileno(stdout), writeset)) {
688 /* Write as much data as possible. */
689 len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
Damien Miller037a0dc1999-12-07 15:38:31 +1100690 buffer_len(&stdout_buffer));
Damien Miller95def091999-11-25 00:26:21 +1100691 if (len <= 0) {
Ben Lindstrom4c8cff12001-04-17 18:09:42 +0000692 if (errno == EINTR || errno == EAGAIN)
Damien Miller95def091999-11-25 00:26:21 +1100693 len = 0;
694 else {
Damien Miller5428f641999-11-25 11:54:57 +1100695 /*
696 * An error or EOF was encountered. Put an
697 * error message to stderr buffer.
698 */
Damien Miller95def091999-11-25 00:26:21 +1100699 snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
700 buffer_append(&stderr_buffer, buf, strlen(buf));
Damien Miller95def091999-11-25 00:26:21 +1100701 quit_pending = 1;
702 return;
703 }
704 }
705 /* Consume printed data from the buffer. */
706 buffer_consume(&stdout_buffer, len);
Ben Lindstroma3700052001-04-05 23:26:32 +0000707 stdout_bytes += len;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000708 }
Damien Miller95def091999-11-25 00:26:21 +1100709 /* Write buffered output to stderr. */
710 if (FD_ISSET(fileno(stderr), writeset)) {
711 /* Write as much data as possible. */
712 len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
Damien Miller037a0dc1999-12-07 15:38:31 +1100713 buffer_len(&stderr_buffer));
Damien Miller95def091999-11-25 00:26:21 +1100714 if (len <= 0) {
Ben Lindstrom4c8cff12001-04-17 18:09:42 +0000715 if (errno == EINTR || errno == EAGAIN)
Damien Miller95def091999-11-25 00:26:21 +1100716 len = 0;
717 else {
Damien Miller5428f641999-11-25 11:54:57 +1100718 /* EOF or error, but can't even print error message. */
Damien Miller95def091999-11-25 00:26:21 +1100719 quit_pending = 1;
720 return;
721 }
722 }
723 /* Consume printed characters from the buffer. */
724 buffer_consume(&stderr_buffer, len);
Ben Lindstroma3700052001-04-05 23:26:32 +0000725 stderr_bytes += len;
Damien Miller95def091999-11-25 00:26:21 +1100726 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000727}
728
Damien Miller5428f641999-11-25 11:54:57 +1100729/*
Damien Millerb38eff82000-04-01 11:09:21 +1000730 * Get packets from the connection input buffer, and process them as long as
731 * there are packets available.
732 *
733 * Any unknown packets received during the actual
734 * session cause the session to terminate. This is
735 * intended to make debugging easier since no
736 * confirmations are sent. Any compatible protocol
737 * extensions must be negotiated during the
738 * preparatory phase.
739 */
740
Ben Lindstrombba81212001-06-25 05:01:22 +0000741static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000742client_process_buffered_input_packets(void)
Damien Millerb38eff82000-04-01 11:09:21 +1000743{
Ben Lindstromf28f6342001-04-04 02:03:04 +0000744 dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
Damien Millerb38eff82000-04-01 11:09:21 +1000745}
746
Damien Millerad833b32000-08-23 10:46:23 +1000747/* scan buf[] for '~' before sending data to the peer */
748
Ben Lindstrombba81212001-06-25 05:01:22 +0000749static int
Damien Millerad833b32000-08-23 10:46:23 +1000750simple_escape_filter(Channel *c, char *buf, int len)
751{
752 /* XXX we assume c->extended is writeable */
753 return process_escapes(&c->input, &c->output, &c->extended, buf, len);
754}
755
Ben Lindstrombba81212001-06-25 05:01:22 +0000756static void
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000757client_channel_closed(int id, void *arg)
758{
759 if (id != session_ident)
760 error("client_channel_closed: id %d != session_ident %d",
761 id, session_ident);
Damien Miller3ec27592001-10-12 11:35:04 +1000762 channel_cancel_cleanup(id);
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000763 session_closed = 1;
Ben Lindstromae8e2d32001-04-14 23:13:02 +0000764 if (in_raw_mode())
Ben Lindstromd3447632001-04-08 18:07:22 +0000765 leave_raw_mode();
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000766}
767
Damien Millerb38eff82000-04-01 11:09:21 +1000768/*
Damien Miller5428f641999-11-25 11:54:57 +1100769 * Implements the interactive session with the server. This is called after
770 * the user has been authenticated, and a command has been started on the
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000771 * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
772 * used as an escape character for terminating or suspending the session.
Damien Miller5428f641999-11-25 11:54:57 +1100773 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000774
Damien Miller4af51302000-04-16 11:18:38 +1000775int
Damien Millerad833b32000-08-23 10:46:23 +1000776client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000777{
Damien Miller5e953212001-01-30 09:14:00 +1100778 fd_set *readset = NULL, *writeset = NULL;
Damien Miller95def091999-11-25 00:26:21 +1100779 double start_time, total_time;
Ben Lindstrom16d29d52001-07-18 16:01:46 +0000780 int max_fd = 0, max_fd2 = 0, len, rekeying = 0, nalloc = 0;
Damien Miller95def091999-11-25 00:26:21 +1100781 char buf[100];
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000782
Damien Miller95def091999-11-25 00:26:21 +1100783 debug("Entering interactive session.");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000784
Damien Miller95def091999-11-25 00:26:21 +1100785 start_time = get_current_time();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000786
Damien Miller95def091999-11-25 00:26:21 +1100787 /* Initialize variables. */
788 escape_pending = 0;
789 last_was_cr = 1;
790 exit_status = -1;
791 stdin_eof = 0;
792 buffer_high = 64 * 1024;
793 connection_in = packet_get_connection_in();
794 connection_out = packet_get_connection_out();
Damien Miller5e953212001-01-30 09:14:00 +1100795 max_fd = MAX(connection_in, connection_out);
796
797 if (!compat20) {
Ben Lindstrom302ea6f2001-04-16 02:01:25 +0000798 /* enable nonblocking unless tty */
799 if (!isatty(fileno(stdin)))
800 set_nonblock(fileno(stdin));
801 if (!isatty(fileno(stdout)))
802 set_nonblock(fileno(stdout));
803 if (!isatty(fileno(stderr)))
804 set_nonblock(fileno(stderr));
Damien Miller5e953212001-01-30 09:14:00 +1100805 max_fd = MAX(max_fd, fileno(stdin));
806 max_fd = MAX(max_fd, fileno(stdout));
807 max_fd = MAX(max_fd, fileno(stderr));
808 }
Damien Miller95def091999-11-25 00:26:21 +1100809 stdin_bytes = 0;
810 stdout_bytes = 0;
811 stderr_bytes = 0;
812 quit_pending = 0;
813 escape_char = escape_char_arg;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000814
Damien Miller95def091999-11-25 00:26:21 +1100815 /* Initialize buffers. */
816 buffer_init(&stdin_buffer);
817 buffer_init(&stdout_buffer);
818 buffer_init(&stderr_buffer);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000819
Damien Millerb38eff82000-04-01 11:09:21 +1000820 client_init_dispatch();
821
Damien Miller95def091999-11-25 00:26:21 +1100822 /* Set signal handlers to restore non-blocking mode. */
823 signal(SIGINT, signal_handler);
824 signal(SIGQUIT, signal_handler);
825 signal(SIGTERM, signal_handler);
Damien Miller95def091999-11-25 00:26:21 +1100826 if (have_pty)
827 signal(SIGWINCH, window_change_handler);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000828
Damien Miller95def091999-11-25 00:26:21 +1100829 if (have_pty)
830 enter_raw_mode();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000831
Ben Lindstrom5b828322001-02-09 01:34:36 +0000832 if (compat20) {
833 session_ident = ssh2_chan_id;
Ben Lindstrom2b1f71b2001-06-05 20:32:21 +0000834 if (escape_char != SSH_ESCAPECHAR_NONE)
Ben Lindstrom5b828322001-02-09 01:34:36 +0000835 channel_register_filter(session_ident,
836 simple_escape_filter);
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000837 if (session_ident != -1)
838 channel_register_cleanup(session_ident,
839 client_channel_closed);
Ben Lindstrom5b828322001-02-09 01:34:36 +0000840 } else {
841 /* Check if we should immediately send eof on stdin. */
Damien Miller1383bd82000-04-06 12:32:37 +1000842 client_check_initial_eof_on_stdin();
Ben Lindstrom5b828322001-02-09 01:34:36 +0000843 }
Damien Millerad833b32000-08-23 10:46:23 +1000844
Damien Miller95def091999-11-25 00:26:21 +1100845 /* Main loop of the client for the interactive session mode. */
846 while (!quit_pending) {
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000847
Damien Miller5428f641999-11-25 11:54:57 +1100848 /* Process buffered packets sent by the server. */
Damien Miller95def091999-11-25 00:26:21 +1100849 client_process_buffered_input_packets();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000850
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000851 if (compat20 && session_closed && !channel_still_open())
Damien Miller1383bd82000-04-06 12:32:37 +1000852 break;
Ben Lindstrom4c3f77d2001-04-05 23:37:36 +0000853
854 rekeying = (xxx_kex != NULL && !xxx_kex->done);
Damien Miller1383bd82000-04-06 12:32:37 +1000855
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000856 if (rekeying) {
857 debug("rekeying in progress");
858 } else {
859 /*
860 * Make packets of buffered stdin data, and buffer
861 * them for sending to the server.
862 */
863 if (!compat20)
864 client_make_packets_from_stdin_data();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000865
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000866 /*
867 * Make packets from buffered channel data, and
868 * enqueue them for sending to the server.
869 */
870 if (packet_not_very_much_data_to_write())
871 channel_output_poll();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000872
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000873 /*
874 * Check if the window size has changed, and buffer a
875 * message about it to the server if so.
876 */
877 client_check_window_change();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000878
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000879 if (quit_pending)
880 break;
881 }
Damien Miller5428f641999-11-25 11:54:57 +1100882 /*
883 * Wait until we have something to do (something becomes
884 * available on one of the descriptors).
885 */
Ben Lindstrom16d29d52001-07-18 16:01:46 +0000886 max_fd2 = max_fd;
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000887 client_wait_until_can_do_something(&readset, &writeset,
Ben Lindstrom16d29d52001-07-18 16:01:46 +0000888 &max_fd2, &nalloc, rekeying);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000889
Damien Miller95def091999-11-25 00:26:21 +1100890 if (quit_pending)
891 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000892
Ben Lindstrombe2cc432001-04-04 23:46:07 +0000893 /* Do channel operations unless rekeying in progress. */
894 if (!rekeying) {
895 channel_after_select(readset, writeset);
896
897 if (need_rekeying) {
898 debug("user requests rekeying");
899 xxx_kex->done = 0;
900 kex_send_kexinit(xxx_kex);
901 need_rekeying = 0;
902 }
903 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000904
Damien Miller1383bd82000-04-06 12:32:37 +1000905 /* Buffer input from the connection. */
Damien Miller5e953212001-01-30 09:14:00 +1100906 client_process_net_input(readset);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000907
Damien Miller1383bd82000-04-06 12:32:37 +1000908 if (quit_pending)
909 break;
910
911 if (!compat20) {
912 /* Buffer data from stdin */
Damien Miller5e953212001-01-30 09:14:00 +1100913 client_process_input(readset);
Damien Miller1383bd82000-04-06 12:32:37 +1000914 /*
915 * Process output to stdout and stderr. Output to
916 * the connection is processed elsewhere (above).
917 */
Damien Miller5e953212001-01-30 09:14:00 +1100918 client_process_output(writeset);
Damien Miller1383bd82000-04-06 12:32:37 +1000919 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000920
Damien Miller5428f641999-11-25 11:54:57 +1100921 /* Send as much buffered packet data as possible to the sender. */
Damien Miller5e953212001-01-30 09:14:00 +1100922 if (FD_ISSET(connection_out, writeset))
Damien Miller95def091999-11-25 00:26:21 +1100923 packet_write_poll();
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000924 }
Damien Miller5e953212001-01-30 09:14:00 +1100925 if (readset)
926 xfree(readset);
927 if (writeset)
928 xfree(writeset);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000929
Damien Miller95def091999-11-25 00:26:21 +1100930 /* Terminate the session. */
931
932 /* Stop watching for window change. */
933 if (have_pty)
934 signal(SIGWINCH, SIG_DFL);
935
Ben Lindstrom601e4362001-06-21 03:19:23 +0000936 channel_free_all();
Damien Miller95def091999-11-25 00:26:21 +1100937
Ben Lindstromec46e0b2001-06-09 01:27:31 +0000938 if (have_pty)
939 leave_raw_mode();
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000940
941 /* restore blocking io */
942 if (!isatty(fileno(stdin)))
943 unset_nonblock(fileno(stdin));
944 if (!isatty(fileno(stdout)))
945 unset_nonblock(fileno(stdout));
946 if (!isatty(fileno(stderr)))
947 unset_nonblock(fileno(stderr));
948
Ben Lindstromec46e0b2001-06-09 01:27:31 +0000949 if (received_signal) {
950 if (in_non_blocking_mode) /* XXX */
951 leave_non_blocking();
Ben Lindstromf8f065b2001-12-06 17:52:16 +0000952 fatal("Killed by signal %d.", (int) received_signal);
Ben Lindstromec46e0b2001-06-09 01:27:31 +0000953 }
954
955 /*
956 * In interactive mode (with pseudo tty) display a message indicating
957 * that the connection has been closed.
958 */
959 if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
960 snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
961 buffer_append(&stderr_buffer, buf, strlen(buf));
962 }
963
Damien Miller95def091999-11-25 00:26:21 +1100964 /* Output any buffered data for stdout. */
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000965 while (buffer_len(&stdout_buffer) > 0) {
966 len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
Damien Miller037a0dc1999-12-07 15:38:31 +1100967 buffer_len(&stdout_buffer));
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000968 if (len <= 0) {
Damien Miller95def091999-11-25 00:26:21 +1100969 error("Write failed flushing stdout buffer.");
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000970 break;
971 }
Damien Miller95def091999-11-25 00:26:21 +1100972 buffer_consume(&stdout_buffer, len);
Ben Lindstroma3700052001-04-05 23:26:32 +0000973 stdout_bytes += len;
Damien Miller95def091999-11-25 00:26:21 +1100974 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000975
Damien Miller95def091999-11-25 00:26:21 +1100976 /* Output any buffered data for stderr. */
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000977 while (buffer_len(&stderr_buffer) > 0) {
978 len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
Damien Miller037a0dc1999-12-07 15:38:31 +1100979 buffer_len(&stderr_buffer));
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000980 if (len <= 0) {
Damien Miller95def091999-11-25 00:26:21 +1100981 error("Write failed flushing stderr buffer.");
Ben Lindstromc93e84c2001-05-12 00:08:37 +0000982 break;
983 }
Damien Miller95def091999-11-25 00:26:21 +1100984 buffer_consume(&stderr_buffer, len);
Ben Lindstroma3700052001-04-05 23:26:32 +0000985 stderr_bytes += len;
Damien Miller95def091999-11-25 00:26:21 +1100986 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000987
Damien Miller95def091999-11-25 00:26:21 +1100988 /* Clear and free any buffers. */
989 memset(buf, 0, sizeof(buf));
990 buffer_free(&stdin_buffer);
991 buffer_free(&stdout_buffer);
992 buffer_free(&stderr_buffer);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000993
Damien Miller95def091999-11-25 00:26:21 +1100994 /* Report bytes transferred, and transfer rates. */
995 total_time = get_current_time() - start_time;
996 debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100997 stdin_bytes, stdout_bytes, stderr_bytes, total_time);
Damien Miller95def091999-11-25 00:26:21 +1100998 if (total_time > 0)
999 debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
Damien Miller9f0f5c62001-12-21 14:45:46 +11001000 stdin_bytes / total_time, stdout_bytes / total_time,
1001 stderr_bytes / total_time);
Damien Miller95def091999-11-25 00:26:21 +11001002
1003 /* Return the exit status of the program. */
1004 debug("Exit status %d", exit_status);
1005 return exit_status;
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001006}
Damien Millerb38eff82000-04-01 11:09:21 +10001007
1008/*********/
1009
Ben Lindstrombba81212001-06-25 05:01:22 +00001010static void
Damien Miller630d6f42002-01-22 23:17:30 +11001011client_input_stdout_data(int type, u_int32_t seq, void *ctxt)
Damien Millerb38eff82000-04-01 11:09:21 +10001012{
Ben Lindstrom46c16222000-12-22 01:43:59 +00001013 u_int data_len;
Damien Millerb38eff82000-04-01 11:09:21 +10001014 char *data = packet_get_string(&data_len);
Damien Miller48b03fc2002-01-22 23:11:40 +11001015 packet_check_eom();
Damien Millerb38eff82000-04-01 11:09:21 +10001016 buffer_append(&stdout_buffer, data, data_len);
Damien Millerb38eff82000-04-01 11:09:21 +10001017 memset(data, 0, data_len);
1018 xfree(data);
1019}
Ben Lindstrombba81212001-06-25 05:01:22 +00001020static void
Damien Miller630d6f42002-01-22 23:17:30 +11001021client_input_stderr_data(int type, u_int32_t seq, void *ctxt)
Damien Millerb38eff82000-04-01 11:09:21 +10001022{
Ben Lindstrom46c16222000-12-22 01:43:59 +00001023 u_int data_len;
Damien Millerb38eff82000-04-01 11:09:21 +10001024 char *data = packet_get_string(&data_len);
Damien Miller48b03fc2002-01-22 23:11:40 +11001025 packet_check_eom();
Damien Millerb38eff82000-04-01 11:09:21 +10001026 buffer_append(&stderr_buffer, data, data_len);
Damien Millerb38eff82000-04-01 11:09:21 +10001027 memset(data, 0, data_len);
1028 xfree(data);
1029}
Ben Lindstrombba81212001-06-25 05:01:22 +00001030static void
Damien Miller630d6f42002-01-22 23:17:30 +11001031client_input_exit_status(int type, u_int32_t seq, void *ctxt)
Damien Millerb38eff82000-04-01 11:09:21 +10001032{
Damien Millerb38eff82000-04-01 11:09:21 +10001033 exit_status = packet_get_int();
Damien Miller48b03fc2002-01-22 23:11:40 +11001034 packet_check_eom();
Damien Millerb38eff82000-04-01 11:09:21 +10001035 /* Acknowledge the exit. */
1036 packet_start(SSH_CMSG_EXIT_CONFIRMATION);
1037 packet_send();
1038 /*
1039 * Must wait for packet to be sent since we are
1040 * exiting the loop.
1041 */
1042 packet_write_wait();
1043 /* Flag that we want to exit. */
1044 quit_pending = 1;
1045}
1046
Ben Lindstrombba81212001-06-25 05:01:22 +00001047static Channel *
Damien Miller0bc1bd82000-11-13 22:57:25 +11001048client_request_forwarded_tcpip(const char *request_type, int rchan)
1049{
1050 Channel* c = NULL;
1051 char *listen_address, *originator_address;
1052 int listen_port, originator_port;
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001053 int sock;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001054
1055 /* Get rest of the packet */
1056 listen_address = packet_get_string(NULL);
1057 listen_port = packet_get_int();
1058 originator_address = packet_get_string(NULL);
1059 originator_port = packet_get_int();
Damien Miller48b03fc2002-01-22 23:11:40 +11001060 packet_check_eom();
Damien Miller0bc1bd82000-11-13 22:57:25 +11001061
1062 debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
1063 listen_address, listen_port, originator_address, originator_port);
1064
Ben Lindstrom173e6462001-07-04 05:15:15 +00001065 sock = channel_connect_by_listen_address(listen_port);
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001066 if (sock < 0) {
1067 xfree(originator_address);
1068 xfree(listen_address);
1069 return NULL;
1070 }
1071 c = channel_new("forwarded-tcpip",
1072 SSH_CHANNEL_CONNECTING, sock, sock, -1,
1073 CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
1074 xstrdup(originator_address), 1);
Damien Miller0bc1bd82000-11-13 22:57:25 +11001075 xfree(originator_address);
1076 xfree(listen_address);
1077 return c;
1078}
1079
Ben Lindstrombba81212001-06-25 05:01:22 +00001080static Channel*
Damien Miller0bc1bd82000-11-13 22:57:25 +11001081client_request_x11(const char *request_type, int rchan)
1082{
1083 Channel *c = NULL;
1084 char *originator;
1085 int originator_port;
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001086 int sock;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001087
1088 if (!options.forward_x11) {
1089 error("Warning: ssh server tried X11 forwarding.");
1090 error("Warning: this is probably a break in attempt by a malicious server.");
1091 return NULL;
1092 }
1093 originator = packet_get_string(NULL);
1094 if (datafellows & SSH_BUG_X11FWD) {
1095 debug2("buggy server: x11 request w/o originator_port");
1096 originator_port = 0;
1097 } else {
1098 originator_port = packet_get_int();
1099 }
Damien Miller48b03fc2002-01-22 23:11:40 +11001100 packet_check_eom();
Damien Miller0bc1bd82000-11-13 22:57:25 +11001101 /* XXX check permission */
Damien Millerd83ff352001-01-30 09:19:34 +11001102 debug("client_request_x11: request from %s %d", originator,
1103 originator_port);
Damien Miller0bc1bd82000-11-13 22:57:25 +11001104 xfree(originator);
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001105 sock = x11_connect_display();
1106 if (sock < 0)
1107 return NULL;
1108 c = channel_new("x11",
1109 SSH_CHANNEL_X11_OPEN, sock, sock, -1,
1110 CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
1111 xstrdup("x11"), 1);
Ben Lindstrom944c4f02001-09-18 05:51:13 +00001112 c->force_drain = 1;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001113 return c;
1114}
1115
Ben Lindstrombba81212001-06-25 05:01:22 +00001116static Channel*
Damien Miller0bc1bd82000-11-13 22:57:25 +11001117client_request_agent(const char *request_type, int rchan)
1118{
1119 Channel *c = NULL;
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001120 int sock;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001121
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();
Ben Lindstrom99c73b32001-05-05 04:09:47 +00001128 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);
Ben Lindstrom944c4f02001-09-18 05:51:13 +00001134 c->force_drain = 1;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001135 return c;
1136}
1137
Damien Millerbd483e72000-04-30 10:00:53 +10001138/* XXXX move to generic input handler */
Ben Lindstrombba81212001-06-25 05:01:22 +00001139static void
Damien Miller630d6f42002-01-22 23:17:30 +11001140client_input_channel_open(int type, u_int32_t seq, void *ctxt)
Damien Millerbd483e72000-04-30 10:00:53 +10001141{
1142 Channel *c = NULL;
1143 char *ctype;
Ben Lindstrom46c16222000-12-22 01:43:59 +00001144 u_int len;
Damien Millerbd483e72000-04-30 10:00:53 +10001145 int rchan;
1146 int rmaxpack;
1147 int rwindow;
1148
1149 ctype = packet_get_string(&len);
1150 rchan = packet_get_int();
1151 rwindow = packet_get_int();
1152 rmaxpack = packet_get_int();
1153
Damien Millere247cc42000-05-07 12:03:14 +10001154 debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
Damien Millerbd483e72000-04-30 10:00:53 +10001155 ctype, rchan, rwindow, rmaxpack);
1156
Damien Miller0bc1bd82000-11-13 22:57:25 +11001157 if (strcmp(ctype, "forwarded-tcpip") == 0) {
1158 c = client_request_forwarded_tcpip(ctype, rchan);
1159 } else if (strcmp(ctype, "x11") == 0) {
1160 c = client_request_x11(ctype, rchan);
1161 } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
1162 c = client_request_agent(ctype, rchan);
Damien Millerbd483e72000-04-30 10:00:53 +10001163 }
1164/* XXX duplicate : */
1165 if (c != NULL) {
1166 debug("confirm %s", ctype);
1167 c->remote_id = rchan;
1168 c->remote_window = rwindow;
1169 c->remote_maxpacket = rmaxpack;
Ben Lindstroma69d89b2001-05-09 00:01:18 +00001170 if (c->type != SSH_CHANNEL_CONNECTING) {
1171 packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
1172 packet_put_int(c->remote_id);
1173 packet_put_int(c->self);
1174 packet_put_int(c->local_window);
1175 packet_put_int(c->local_maxpacket);
1176 packet_send();
1177 }
Damien Millerbd483e72000-04-30 10:00:53 +10001178 } else {
1179 debug("failure %s", ctype);
1180 packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
1181 packet_put_int(rchan);
1182 packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
Ben Lindstromf3436742001-04-29 19:52:00 +00001183 if (!(datafellows & SSH_BUG_OPENFAILURE)) {
Ben Lindstroma69d89b2001-05-09 00:01:18 +00001184 packet_put_cstring("open failed");
Ben Lindstromf3436742001-04-29 19:52:00 +00001185 packet_put_cstring("");
1186 }
Damien Millerbd483e72000-04-30 10:00:53 +10001187 packet_send();
1188 }
1189 xfree(ctype);
1190}
Ben Lindstrombba81212001-06-25 05:01:22 +00001191static void
Damien Miller630d6f42002-01-22 23:17:30 +11001192client_input_channel_req(int type, u_int32_t seq, void *ctxt)
Ben Lindstrom5b828322001-02-09 01:34:36 +00001193{
1194 Channel *c = NULL;
1195 int id, reply, success = 0;
1196 char *rtype;
1197
1198 id = packet_get_int();
1199 rtype = packet_get_string(NULL);
1200 reply = packet_get_char();
1201
1202 debug("client_input_channel_req: channel %d rtype %s reply %d",
1203 id, rtype, reply);
1204
1205 if (session_ident == -1) {
1206 error("client_input_channel_req: no channel %d", session_ident);
1207 } else if (id != session_ident) {
1208 error("client_input_channel_req: channel %d: wrong channel: %d",
1209 session_ident, id);
1210 }
1211 c = channel_lookup(id);
1212 if (c == NULL) {
1213 error("client_input_channel_req: channel %d: unknown channel", id);
1214 } else if (strcmp(rtype, "exit-status") == 0) {
1215 success = 1;
1216 exit_status = packet_get_int();
Damien Miller48b03fc2002-01-22 23:11:40 +11001217 packet_check_eom();
Ben Lindstrom5b828322001-02-09 01:34:36 +00001218 }
1219 if (reply) {
1220 packet_start(success ?
1221 SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
1222 packet_put_int(c->remote_id);
1223 packet_send();
1224 }
1225 xfree(rtype);
1226}
Damien Millerc3fa4072002-01-22 23:21:58 +11001227static void
1228client_input_global_request(int type, u_int32_t seq, void *ctxt)
1229{
1230 char *rtype;
1231 int want_reply;
1232 int success = 0;
1233
1234 rtype = packet_get_string(NULL);
1235 want_reply = packet_get_char();
1236 debug("client_input_global_request: rtype %s want_reply %d", rtype, want_reply);
1237 if (want_reply) {
1238 packet_start(success ?
1239 SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
1240 packet_send();
1241 packet_write_wait();
1242 }
1243 xfree(rtype);
1244}
Damien Millerbd483e72000-04-30 10:00:53 +10001245
Ben Lindstrombba81212001-06-25 05:01:22 +00001246static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +00001247client_init_dispatch_20(void)
Damien Miller1383bd82000-04-06 12:32:37 +10001248{
Ben Lindstrom8ac91062001-04-04 17:57:54 +00001249 dispatch_init(&dispatch_protocol_error);
Damien Miller1383bd82000-04-06 12:32:37 +10001250 dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
1251 dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
1252 dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
1253 dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
Damien Millerbd483e72000-04-30 10:00:53 +10001254 dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
Damien Miller1383bd82000-04-06 12:32:37 +10001255 dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1256 dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
Ben Lindstrom5b828322001-02-09 01:34:36 +00001257 dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
Damien Miller1383bd82000-04-06 12:32:37 +10001258 dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
Damien Millerc3fa4072002-01-22 23:21:58 +11001259 dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
Ben Lindstrom8ac91062001-04-04 17:57:54 +00001260
1261 /* rekeying */
1262 dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
Damien Miller1383bd82000-04-06 12:32:37 +10001263}
Ben Lindstrombba81212001-06-25 05:01:22 +00001264static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +00001265client_init_dispatch_13(void)
Damien Millerb38eff82000-04-01 11:09:21 +10001266{
1267 dispatch_init(NULL);
1268 dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
1269 dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
1270 dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
Damien Millerb38eff82000-04-01 11:09:21 +10001271 dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
1272 dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
1273 dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
Damien Millerb38eff82000-04-01 11:09:21 +10001274 dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
1275 dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
1276 dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
Damien Miller69b69aa2000-10-28 14:19:58 +11001277
1278 dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
1279 &auth_input_open_request : &deny_input_open);
1280 dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
1281 &x11_input_open : &deny_input_open);
Damien Millerb38eff82000-04-01 11:09:21 +10001282}
Ben Lindstrombba81212001-06-25 05:01:22 +00001283static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +00001284client_init_dispatch_15(void)
Damien Millerb38eff82000-04-01 11:09:21 +10001285{
1286 client_init_dispatch_13();
1287 dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
1288 dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
1289}
Ben Lindstromdb47f382001-07-04 05:10:27 +00001290static void
Ben Lindstrom31ca54a2001-02-09 02:11:24 +00001291client_init_dispatch(void)
Damien Millerb38eff82000-04-01 11:09:21 +10001292{
Damien Miller1383bd82000-04-06 12:32:37 +10001293 if (compat20)
1294 client_init_dispatch_20();
1295 else if (compat13)
Damien Millerb38eff82000-04-01 11:09:21 +10001296 client_init_dispatch_13();
1297 else
1298 client_init_dispatch_15();
1299}