2006-08-05 01:34:19 +00:00
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/* $OpenBSD: clientloop.c,v 1.173 2006/07/26 13:57:17 stevesk Exp $ */
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1999-10-27 03:42:43 +00:00
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/*
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1999-11-24 13:26:21 +00:00
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* Author: Tatu Ylonen <ylo@cs.hut.fi>
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* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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* All rights reserved
|
2000-09-16 02:29:08 +00:00
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* The main loop for the interactive session (client side).
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2000-04-16 01:18:38 +00:00
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*
|
2000-09-16 02:29:08 +00:00
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* As far as I am concerned, the code I have written for this software
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* can be used freely for any purpose. Any derived versions of this
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* software must be clearly marked as such, and if the derived work is
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* incompatible with the protocol description in the RFC file, it must be
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* called by a name other than "ssh" or "Secure Shell".
|
2000-04-16 01:18:38 +00:00
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*
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*
|
2000-09-16 02:29:08 +00:00
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* Copyright (c) 1999 Theo de Raadt. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
|
2000-04-16 01:18:38 +00:00
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*
|
2000-04-06 02:32:37 +00:00
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* SSH2 support added by Markus Friedl.
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2001-07-04 03:32:30 +00:00
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* Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved.
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2000-09-16 02:29:08 +00:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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|
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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1999-11-24 13:26:21 +00:00
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*/
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1999-10-27 03:42:43 +00:00
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#include "includes.h"
|
2006-03-15 00:28:34 +00:00
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|
2006-03-15 00:45:54 +00:00
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#include <sys/types.h>
|
2006-08-05 00:57:45 +00:00
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#include <sys/ioctl.h>
|
2006-08-05 01:02:17 +00:00
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#include <sys/param.h>
|
2006-03-15 00:45:54 +00:00
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
|
2006-08-05 00:57:45 +00:00
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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#endif
|
2006-07-10 11:08:03 +00:00
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#include <sys/socket.h>
|
2006-03-15 00:11:28 +00:00
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|
2006-03-15 00:53:45 +00:00
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#include <ctype.h>
|
2006-07-12 12:22:46 +00:00
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#include <errno.h>
|
2006-03-15 03:42:54 +00:00
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#ifdef HAVE_PATHS_H
|
2006-03-15 00:16:59 +00:00
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#include <paths.h>
|
2006-03-15 03:42:54 +00:00
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#endif
|
2006-03-15 00:52:09 +00:00
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#include <signal.h>
|
2006-08-05 01:34:19 +00:00
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#include <stdlib.h>
|
2006-07-24 04:13:33 +00:00
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#include <string.h>
|
2006-03-15 00:11:28 +00:00
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#include <termios.h>
|
2006-07-24 04:01:23 +00:00
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#include <unistd.h>
|
1999-10-27 03:42:43 +00:00
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#include "ssh.h"
|
2001-01-22 05:34:40 +00:00
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#include "ssh1.h"
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#include "ssh2.h"
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#include "xmalloc.h"
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1999-10-27 03:42:43 +00:00
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#include "packet.h"
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#include "buffer.h"
|
2000-04-01 01:09:21 +00:00
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#include "compat.h"
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2001-06-09 00:36:26 +00:00
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#include "channels.h"
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2000-04-01 01:09:21 +00:00
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#include "dispatch.h"
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2000-08-23 00:46:23 +00:00
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#include "buffer.h"
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#include "bufaux.h"
|
2000-11-13 11:57:25 +00:00
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#include "key.h"
|
2001-04-04 02:03:04 +00:00
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#include "kex.h"
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2001-01-22 05:34:40 +00:00
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#include "log.h"
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#include "readconf.h"
|
2001-01-18 02:04:35 +00:00
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#include "clientloop.h"
|
2005-12-13 08:29:36 +00:00
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#include "sshconnect.h"
|
2001-01-22 05:34:40 +00:00
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#include "authfd.h"
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#include "atomicio.h"
|
2004-05-13 06:06:46 +00:00
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#include "sshpty.h"
|
2001-04-16 02:01:25 +00:00
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#include "misc.h"
|
2004-06-15 00:34:08 +00:00
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#include "monitor_fdpass.h"
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#include "match.h"
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#include "msg.h"
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2000-10-28 03:19:58 +00:00
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/* import options */
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extern Options options;
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1999-10-27 03:42:43 +00:00
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/* Flag indicating that stdin should be redirected from /dev/null. */
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extern int stdin_null_flag;
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|
2003-12-17 05:31:53 +00:00
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/* Flag indicating that no shell has been requested */
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extern int no_shell_flag;
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|
2004-06-15 00:34:08 +00:00
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/* Control socket */
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extern int control_fd;
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1999-11-25 00:54:57 +00:00
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/*
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* Name of the host we are connecting to. This is the name given on the
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* command line, or the HostName specified for the user-supplied name in a
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* configuration file.
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*/
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1999-10-27 03:42:43 +00:00
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extern char *host;
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1999-11-25 00:54:57 +00:00
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/*
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* Flag to indicate that we have received a window change signal which has
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* not yet been processed. This will cause a message indicating the new
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* window size to be sent to the server a little later. This is volatile
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* because this is updated in a signal handler.
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*/
|
2001-12-06 16:48:14 +00:00
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static volatile sig_atomic_t received_window_change_signal = 0;
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static volatile sig_atomic_t received_signal = 0;
|
1999-10-27 03:42:43 +00:00
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|
2005-11-05 04:14:59 +00:00
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/* Flag indicating whether the user's terminal is in non-blocking mode. */
|
1999-10-27 03:42:43 +00:00
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static int in_non_blocking_mode = 0;
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/* Common data for the client loop code. */
|
2006-04-23 02:08:37 +00:00
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static volatile sig_atomic_t quit_pending; /* Set non-zero to quit the loop. */
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2000-08-23 00:46:23 +00:00
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static int escape_char; /* Escape character. */
|
1999-11-24 13:26:21 +00:00
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static int escape_pending; /* Last character was the escape character */
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static int last_was_cr; /* Last character was a newline. */
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static int exit_status; /* Used to store the exit status of the command. */
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static int stdin_eof; /* EOF has been encountered on standard error. */
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static Buffer stdin_buffer; /* Buffer for stdin data. */
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static Buffer stdout_buffer; /* Buffer for stdout data. */
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static Buffer stderr_buffer; /* Buffer for stderr data. */
|
2000-12-22 01:43:59 +00:00
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static u_long stdin_bytes, stdout_bytes, stderr_bytes;
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static u_int buffer_high;/* Soft max buffer size. */
|
1999-11-24 13:26:21 +00:00
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static int connection_in; /* Connection to server (input). */
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static int connection_out; /* Connection to server (output). */
|
2001-04-04 23:46:07 +00:00
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static int need_rekeying; /* Set to non-zero if rekeying is requested. */
|
2001-04-05 23:37:36 +00:00
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static int session_closed = 0; /* In SSH2: login session closed. */
|
2003-12-17 05:33:10 +00:00
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static int server_alive_timeouts = 0;
|
1999-10-27 03:42:43 +00:00
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|
2001-06-25 05:01:22 +00:00
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static void client_init_dispatch(void);
|
2000-04-06 02:32:37 +00:00
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int session_ident = -1;
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|
2004-06-15 00:34:08 +00:00
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struct confirm_ctx {
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int want_tty;
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int want_subsys;
|
2005-07-05 23:44:19 +00:00
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int want_x_fwd;
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int want_agent_fwd;
|
2004-06-15 00:34:08 +00:00
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Buffer cmd;
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char *term;
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struct termios tio;
|
2004-06-17 15:17:29 +00:00
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char **env;
|
2004-06-15 00:34:08 +00:00
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};
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|
2001-04-04 02:03:04 +00:00
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/*XXX*/
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extern Kex *xxx_kex;
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|
2004-06-15 00:34:08 +00:00
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void ssh_process_session2_setup(int, int, int, Buffer *);
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|
1999-10-27 03:42:43 +00:00
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/* Restores stdin to blocking mode. */
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|
2001-06-25 05:01:22 +00:00
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static void
|
2001-02-09 02:11:24 +00:00
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leave_non_blocking(void)
|
1999-10-27 03:42:43 +00:00
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{
|
1999-11-24 13:26:21 +00:00
|
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if (in_non_blocking_mode) {
|
2004-06-15 05:47:51 +00:00
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unset_nonblock(fileno(stdin));
|
1999-11-24 13:26:21 +00:00
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in_non_blocking_mode = 0;
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}
|
1999-10-27 03:42:43 +00:00
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}
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|
1999-11-24 13:26:21 +00:00
|
|
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/* Puts stdin terminal in non-blocking mode. */
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|
2001-06-25 05:01:22 +00:00
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static void
|
2001-02-09 02:11:24 +00:00
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enter_non_blocking(void)
|
1999-10-27 03:42:43 +00:00
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{
|
1999-11-24 13:26:21 +00:00
|
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in_non_blocking_mode = 1;
|
2004-06-15 00:35:30 +00:00
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|
set_nonblock(fileno(stdin));
|
1999-10-27 03:42:43 +00:00
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}
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|
1999-11-25 00:54:57 +00:00
|
|
|
/*
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|
|
|
* Signal handler for the window change signal (SIGWINCH). This just sets a
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|
* flag indicating that the window has changed.
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*/
|
2006-03-26 02:59:20 +00:00
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/*ARGSUSED */
|
2001-06-25 05:01:22 +00:00
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static void
|
1999-11-24 13:26:21 +00:00
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window_change_handler(int sig)
|
1999-10-27 03:42:43 +00:00
|
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{
|
1999-11-24 13:26:21 +00:00
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received_window_change_signal = 1;
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signal(SIGWINCH, window_change_handler);
|
1999-10-27 03:42:43 +00:00
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}
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|
1999-11-25 00:54:57 +00:00
|
|
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/*
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|
|
|
* Signal handler for signals that cause the program to terminate. These
|
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|
|
* signals must be trapped to restore terminal modes.
|
|
|
|
*/
|
2006-03-26 02:59:20 +00:00
|
|
|
/*ARGSUSED */
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
1999-11-24 13:26:21 +00:00
|
|
|
signal_handler(int sig)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
2001-06-09 01:27:31 +00:00
|
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|
received_signal = sig;
|
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|
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quit_pending = 1;
|
1999-10-27 03:42:43 +00:00
|
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|
}
|
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|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
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|
|
* Returns current time in seconds from Jan 1, 1970 with the maximum
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|
|
* available resolution.
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|
*/
|
1999-10-27 03:42:43 +00:00
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|
2001-06-25 05:01:22 +00:00
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|
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static double
|
2001-02-09 02:11:24 +00:00
|
|
|
get_current_time(void)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
1999-11-24 13:26:21 +00:00
|
|
|
struct timeval tv;
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|
|
gettimeofday(&tv, NULL);
|
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|
|
return (double) tv.tv_sec + (double) tv.tv_usec / 1000000.0;
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
|
2005-06-17 02:54:33 +00:00
|
|
|
#define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
|
|
|
|
void
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|
|
client_x11_get_proto(const char *display, const char *xauth_path,
|
|
|
|
u_int trusted, char **_proto, char **_data)
|
|
|
|
{
|
|
|
|
char cmd[1024];
|
|
|
|
char line[512];
|
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|
|
char xdisplay[512];
|
|
|
|
static char proto[512], data[512];
|
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|
|
FILE *f;
|
|
|
|
int got_data = 0, generated = 0, do_unlink = 0, i;
|
|
|
|
char *xauthdir, *xauthfile;
|
|
|
|
struct stat st;
|
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|
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|
xauthdir = xauthfile = NULL;
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|
|
*_proto = proto;
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|
|
*_data = data;
|
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|
|
proto[0] = data[0] = '\0';
|
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|
|
|
|
|
|
if (xauth_path == NULL ||(stat(xauth_path, &st) == -1)) {
|
|
|
|
debug("No xauth program.");
|
|
|
|
} else {
|
|
|
|
if (display == NULL) {
|
|
|
|
debug("x11_get_proto: DISPLAY not set");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/*
|
|
|
|
* Handle FamilyLocal case where $DISPLAY does
|
|
|
|
* not match an authorization entry. For this we
|
|
|
|
* just try "xauth list unix:displaynum.screennum".
|
|
|
|
* XXX: "localhost" match to determine FamilyLocal
|
|
|
|
* is not perfect.
|
|
|
|
*/
|
|
|
|
if (strncmp(display, "localhost:", 10) == 0) {
|
|
|
|
snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
|
|
|
|
display + 10);
|
|
|
|
display = xdisplay;
|
|
|
|
}
|
|
|
|
if (trusted == 0) {
|
|
|
|
xauthdir = xmalloc(MAXPATHLEN);
|
|
|
|
xauthfile = xmalloc(MAXPATHLEN);
|
|
|
|
strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN);
|
|
|
|
if (mkdtemp(xauthdir) != NULL) {
|
|
|
|
do_unlink = 1;
|
|
|
|
snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile",
|
|
|
|
xauthdir);
|
|
|
|
snprintf(cmd, sizeof(cmd),
|
|
|
|
"%s -f %s generate %s " SSH_X11_PROTO
|
|
|
|
" untrusted timeout 1200 2>" _PATH_DEVNULL,
|
|
|
|
xauth_path, xauthfile, display);
|
|
|
|
debug2("x11_get_proto: %s", cmd);
|
|
|
|
if (system(cmd) == 0)
|
|
|
|
generated = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
snprintf(cmd, sizeof(cmd),
|
2005-10-03 08:05:26 +00:00
|
|
|
"%s %s%s list %s 2>" _PATH_DEVNULL,
|
2005-06-17 02:54:33 +00:00
|
|
|
xauth_path,
|
|
|
|
generated ? "-f " : "" ,
|
|
|
|
generated ? xauthfile : "",
|
|
|
|
display);
|
|
|
|
debug2("x11_get_proto: %s", cmd);
|
|
|
|
f = popen(cmd, "r");
|
|
|
|
if (f && fgets(line, sizeof(line), f) &&
|
|
|
|
sscanf(line, "%*s %511s %511s", proto, data) == 2)
|
|
|
|
got_data = 1;
|
|
|
|
if (f)
|
|
|
|
pclose(f);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (do_unlink) {
|
|
|
|
unlink(xauthfile);
|
|
|
|
rmdir(xauthdir);
|
|
|
|
}
|
|
|
|
if (xauthdir)
|
|
|
|
xfree(xauthdir);
|
|
|
|
if (xauthfile)
|
|
|
|
xfree(xauthfile);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we didn't get authentication data, just make up some
|
|
|
|
* data. The forwarding code will check the validity of the
|
|
|
|
* response anyway, and substitute this data. The X11
|
|
|
|
* server, however, will ignore this fake data and use
|
|
|
|
* whatever authentication mechanisms it was using otherwise
|
|
|
|
* for the local connection.
|
|
|
|
*/
|
|
|
|
if (!got_data) {
|
|
|
|
u_int32_t rnd = 0;
|
|
|
|
|
|
|
|
logit("Warning: No xauth data; "
|
|
|
|
"using fake authentication data for X11 forwarding.");
|
|
|
|
strlcpy(proto, SSH_X11_PROTO, sizeof proto);
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
|
|
if (i % 4 == 0)
|
|
|
|
rnd = arc4random();
|
|
|
|
snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
|
|
|
|
rnd & 0xff);
|
|
|
|
rnd >>= 8;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* This is called when the interactive is entered. This checks if there is
|
|
|
|
* an EOF coming on stdin. We must check this explicitly, as select() does
|
|
|
|
* not appear to wake up when redirecting from /dev/null.
|
|
|
|
*/
|
1999-10-27 03:42:43 +00:00
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_check_initial_eof_on_stdin(void)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
1999-11-24 13:26:21 +00:00
|
|
|
int len;
|
|
|
|
char buf[1];
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* If standard input is to be "redirected from /dev/null", we simply
|
|
|
|
* mark that we have seen an EOF and send an EOF message to the
|
|
|
|
* server. Otherwise, we try to read a single character; it appears
|
|
|
|
* that for some files, such /dev/null, select() never wakes up for
|
|
|
|
* read for this descriptor, which means that we never get EOF. This
|
|
|
|
* way we will get the EOF if stdin comes from /dev/null or similar.
|
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
if (stdin_null_flag) {
|
|
|
|
/* Fake EOF on stdin. */
|
|
|
|
debug("Sending eof.");
|
|
|
|
stdin_eof = 1;
|
|
|
|
packet_start(SSH_CMSG_EOF);
|
|
|
|
packet_send();
|
|
|
|
} else {
|
|
|
|
enter_non_blocking();
|
|
|
|
|
|
|
|
/* Check for immediate EOF on stdin. */
|
|
|
|
len = read(fileno(stdin), buf, 1);
|
|
|
|
if (len == 0) {
|
1999-11-25 00:54:57 +00:00
|
|
|
/* EOF. Record that we have seen it and send EOF to server. */
|
1999-11-24 13:26:21 +00:00
|
|
|
debug("Sending eof.");
|
|
|
|
stdin_eof = 1;
|
|
|
|
packet_start(SSH_CMSG_EOF);
|
|
|
|
packet_send();
|
|
|
|
} else if (len > 0) {
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Got data. We must store the data in the buffer,
|
|
|
|
* and also process it as an escape character if
|
|
|
|
* appropriate.
|
|
|
|
*/
|
2000-12-22 01:43:59 +00:00
|
|
|
if ((u_char) buf[0] == escape_char)
|
1999-11-24 13:26:21 +00:00
|
|
|
escape_pending = 1;
|
2001-03-05 06:14:02 +00:00
|
|
|
else
|
1999-11-24 13:26:21 +00:00
|
|
|
buffer_append(&stdin_buffer, buf, 1);
|
|
|
|
}
|
|
|
|
leave_non_blocking();
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Make packets from buffered stdin data, and buffer them for sending to the
|
|
|
|
* connection.
|
|
|
|
*/
|
1999-10-27 03:42:43 +00:00
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_make_packets_from_stdin_data(void)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int len;
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* Send buffered stdin data to the server. */
|
|
|
|
while (buffer_len(&stdin_buffer) > 0 &&
|
2001-12-21 03:45:46 +00:00
|
|
|
packet_not_very_much_data_to_write()) {
|
1999-11-24 13:26:21 +00:00
|
|
|
len = buffer_len(&stdin_buffer);
|
|
|
|
/* Keep the packets at reasonable size. */
|
|
|
|
if (len > packet_get_maxsize())
|
|
|
|
len = packet_get_maxsize();
|
|
|
|
packet_start(SSH_CMSG_STDIN_DATA);
|
|
|
|
packet_put_string(buffer_ptr(&stdin_buffer), len);
|
|
|
|
packet_send();
|
|
|
|
buffer_consume(&stdin_buffer, len);
|
2001-03-05 06:14:02 +00:00
|
|
|
stdin_bytes += len;
|
1999-11-24 13:26:21 +00:00
|
|
|
/* If we have a pending EOF, send it now. */
|
|
|
|
if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
|
|
|
|
packet_start(SSH_CMSG_EOF);
|
|
|
|
packet_send();
|
|
|
|
}
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Checks if the client window has changed, and sends a packet about it to
|
|
|
|
* the server if so. The actual change is detected elsewhere (by a software
|
|
|
|
* interrupt on Unix); this just checks the flag and sends a message if
|
|
|
|
* appropriate.
|
|
|
|
*/
|
1999-10-27 03:42:43 +00:00
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_check_window_change(void)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
2000-04-06 02:32:37 +00:00
|
|
|
struct winsize ws;
|
|
|
|
|
|
|
|
if (! received_window_change_signal)
|
|
|
|
return;
|
|
|
|
/** XXX race */
|
|
|
|
received_window_change_signal = 0;
|
|
|
|
|
2000-09-30 03:20:03 +00:00
|
|
|
debug2("client_check_window_change: changed");
|
2000-04-06 02:32:37 +00:00
|
|
|
|
|
|
|
if (compat20) {
|
2004-06-15 00:34:08 +00:00
|
|
|
channel_send_window_changes();
|
2000-04-06 02:32:37 +00:00
|
|
|
} else {
|
2004-06-15 00:34:08 +00:00
|
|
|
if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
|
|
|
|
return;
|
2000-04-06 02:32:37 +00:00
|
|
|
packet_start(SSH_CMSG_WINDOW_SIZE);
|
2006-03-26 03:04:36 +00:00
|
|
|
packet_put_int((u_int)ws.ws_row);
|
|
|
|
packet_put_int((u_int)ws.ws_col);
|
|
|
|
packet_put_int((u_int)ws.ws_xpixel);
|
|
|
|
packet_put_int((u_int)ws.ws_ypixel);
|
2000-04-06 02:32:37 +00:00
|
|
|
packet_send();
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2003-12-17 05:33:10 +00:00
|
|
|
static void
|
|
|
|
client_global_request_reply(int type, u_int32_t seq, void *ctxt)
|
|
|
|
{
|
|
|
|
server_alive_timeouts = 0;
|
|
|
|
client_global_request_reply_fwd(type, seq, ctxt);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
server_alive_check(void)
|
|
|
|
{
|
|
|
|
if (++server_alive_timeouts > options.server_alive_count_max)
|
|
|
|
packet_disconnect("Timeout, server not responding.");
|
|
|
|
packet_start(SSH2_MSG_GLOBAL_REQUEST);
|
|
|
|
packet_put_cstring("keepalive@openssh.com");
|
|
|
|
packet_put_char(1); /* boolean: want reply */
|
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Waits until the client can do something (some data becomes available on
|
|
|
|
* one of the file descriptors).
|
|
|
|
*/
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-01-29 22:14:00 +00:00
|
|
|
client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
|
2004-08-13 11:18:00 +00:00
|
|
|
int *maxfdp, u_int *nallocp, int rekeying)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
2003-12-17 05:33:10 +00:00
|
|
|
struct timeval tv, *tvp;
|
|
|
|
int ret;
|
|
|
|
|
2001-01-29 22:14:00 +00:00
|
|
|
/* Add any selections by the channel mechanism. */
|
2001-07-18 16:01:46 +00:00
|
|
|
channel_prepare_select(readsetp, writesetp, maxfdp, nallocp, rekeying);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2000-04-06 02:32:37 +00:00
|
|
|
if (!compat20) {
|
|
|
|
/* Read from the connection, unless our buffers are full. */
|
|
|
|
if (buffer_len(&stdout_buffer) < buffer_high &&
|
|
|
|
buffer_len(&stderr_buffer) < buffer_high &&
|
|
|
|
channel_not_very_much_buffered_data())
|
2001-01-29 22:14:00 +00:00
|
|
|
FD_SET(connection_in, *readsetp);
|
2000-04-06 02:32:37 +00:00
|
|
|
/*
|
|
|
|
* Read from stdin, unless we have seen EOF or have very much
|
|
|
|
* buffered data to send to the server.
|
|
|
|
*/
|
|
|
|
if (!stdin_eof && packet_not_very_much_data_to_write())
|
2001-01-29 22:14:00 +00:00
|
|
|
FD_SET(fileno(stdin), *readsetp);
|
2000-04-06 02:32:37 +00:00
|
|
|
|
|
|
|
/* Select stdout/stderr if have data in buffer. */
|
|
|
|
if (buffer_len(&stdout_buffer) > 0)
|
2001-01-29 22:14:00 +00:00
|
|
|
FD_SET(fileno(stdout), *writesetp);
|
2000-04-06 02:32:37 +00:00
|
|
|
if (buffer_len(&stderr_buffer) > 0)
|
2001-01-29 22:14:00 +00:00
|
|
|
FD_SET(fileno(stderr), *writesetp);
|
2000-04-06 02:32:37 +00:00
|
|
|
} else {
|
2001-05-17 03:19:40 +00:00
|
|
|
/* channel_prepare_select could have closed the last channel */
|
2001-10-12 01:36:09 +00:00
|
|
|
if (session_closed && !channel_still_open() &&
|
|
|
|
!packet_have_data_to_write()) {
|
|
|
|
/* clear mask since we did not call select() */
|
2001-11-12 00:06:32 +00:00
|
|
|
memset(*readsetp, 0, *nallocp);
|
|
|
|
memset(*writesetp, 0, *nallocp);
|
2001-10-12 01:36:09 +00:00
|
|
|
return;
|
2001-05-17 03:19:40 +00:00
|
|
|
} else {
|
|
|
|
FD_SET(connection_in, *readsetp);
|
|
|
|
}
|
2000-04-06 02:32:37 +00:00
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* Select server connection if have data to write to the server. */
|
|
|
|
if (packet_have_data_to_write())
|
2001-01-29 22:14:00 +00:00
|
|
|
FD_SET(connection_out, *writesetp);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
if (control_fd != -1)
|
|
|
|
FD_SET(control_fd, *readsetp);
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Wait for something to happen. This will suspend the process until
|
|
|
|
* some selected descriptor can be read, written, or has some other
|
2003-12-17 05:33:10 +00:00
|
|
|
* event pending.
|
1999-11-25 00:54:57 +00:00
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2003-12-17 05:33:10 +00:00
|
|
|
if (options.server_alive_interval == 0 || !compat20)
|
|
|
|
tvp = NULL;
|
2004-07-17 06:12:08 +00:00
|
|
|
else {
|
2003-12-17 05:33:10 +00:00
|
|
|
tv.tv_sec = options.server_alive_interval;
|
|
|
|
tv.tv_usec = 0;
|
|
|
|
tvp = &tv;
|
|
|
|
}
|
|
|
|
ret = select((*maxfdp)+1, *readsetp, *writesetp, NULL, tvp);
|
|
|
|
if (ret < 0) {
|
1999-11-24 13:26:21 +00:00
|
|
|
char buf[100];
|
2001-02-15 03:12:08 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We have to clear the select masks, because we return.
|
|
|
|
* We have to return, because the mainloop checks for the flags
|
|
|
|
* set by the signal handlers.
|
|
|
|
*/
|
2001-11-12 00:06:32 +00:00
|
|
|
memset(*readsetp, 0, *nallocp);
|
|
|
|
memset(*writesetp, 0, *nallocp);
|
2001-02-15 03:12:08 +00:00
|
|
|
|
1999-11-24 13:26:21 +00:00
|
|
|
if (errno == EINTR)
|
|
|
|
return;
|
|
|
|
/* Note: we might still have data in the buffers. */
|
|
|
|
snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno));
|
|
|
|
buffer_append(&stderr_buffer, buf, strlen(buf));
|
|
|
|
quit_pending = 1;
|
2003-12-17 05:33:10 +00:00
|
|
|
} else if (ret == 0)
|
|
|
|
server_alive_check();
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2000-08-23 00:46:23 +00:00
|
|
|
client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
1999-11-24 13:26:21 +00:00
|
|
|
/* Flush stdout and stderr buffers. */
|
2000-08-23 00:46:23 +00:00
|
|
|
if (buffer_len(bout) > 0)
|
2003-07-03 03:46:56 +00:00
|
|
|
atomicio(vwrite, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
|
2000-08-23 00:46:23 +00:00
|
|
|
if (buffer_len(berr) > 0)
|
2003-07-03 03:46:56 +00:00
|
|
|
atomicio(vwrite, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
leave_raw_mode();
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Free (and clear) the buffer to reduce the amount of data that gets
|
|
|
|
* written to swap.
|
|
|
|
*/
|
2000-08-23 00:46:23 +00:00
|
|
|
buffer_free(bin);
|
|
|
|
buffer_free(bout);
|
|
|
|
buffer_free(berr);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* Send the suspend signal to the program itself. */
|
|
|
|
kill(getpid(), SIGTSTP);
|
|
|
|
|
2004-11-05 09:35:44 +00:00
|
|
|
/* Reset window sizes in case they have changed */
|
|
|
|
received_window_change_signal = 1;
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* OK, we have been continued by the user. Reinitialize buffers. */
|
2000-08-23 00:46:23 +00:00
|
|
|
buffer_init(bin);
|
|
|
|
buffer_init(bout);
|
|
|
|
buffer_init(berr);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
enter_raw_mode();
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2006-03-26 03:25:37 +00:00
|
|
|
client_process_net_input(fd_set *readset)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
2000-04-06 02:32:37 +00:00
|
|
|
int len;
|
|
|
|
char buf[8192];
|
1999-11-24 13:26:21 +00:00
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Read input from the server, and add any such data to the buffer of
|
|
|
|
* the packet subsystem.
|
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
if (FD_ISSET(connection_in, readset)) {
|
|
|
|
/* Read as much as possible. */
|
|
|
|
len = read(connection_in, buf, sizeof(buf));
|
|
|
|
if (len == 0) {
|
|
|
|
/* Received EOF. The remote host has closed the connection. */
|
|
|
|
snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
|
|
|
|
host);
|
1999-10-27 03:42:43 +00:00
|
|
|
buffer_append(&stderr_buffer, buf, strlen(buf));
|
|
|
|
quit_pending = 1;
|
|
|
|
return;
|
1999-11-24 13:26:21 +00:00
|
|
|
}
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* There is a kernel bug on Solaris that causes select to
|
|
|
|
* sometimes wake up even though there is no data available.
|
|
|
|
*/
|
2001-03-06 03:34:40 +00:00
|
|
|
if (len < 0 && (errno == EAGAIN || errno == EINTR))
|
1999-11-24 13:26:21 +00:00
|
|
|
len = 0;
|
|
|
|
|
|
|
|
if (len < 0) {
|
|
|
|
/* An error has encountered. Perhaps there is a network problem. */
|
|
|
|
snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
|
|
|
|
host, strerror(errno));
|
|
|
|
buffer_append(&stderr_buffer, buf, strlen(buf));
|
|
|
|
quit_pending = 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
packet_process_incoming(buf, len);
|
|
|
|
}
|
2000-04-06 02:32:37 +00:00
|
|
|
}
|
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
static void
|
|
|
|
client_subsystem_reply(int type, u_int32_t seq, void *ctxt)
|
|
|
|
{
|
|
|
|
int id;
|
|
|
|
Channel *c;
|
2004-07-17 06:12:08 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
id = packet_get_int();
|
|
|
|
packet_check_eom();
|
|
|
|
|
|
|
|
if ((c = channel_lookup(id)) == NULL) {
|
|
|
|
error("%s: no channel for id %d", __func__, id);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (type == SSH2_MSG_CHANNEL_SUCCESS)
|
|
|
|
debug2("Request suceeded on channel %d", id);
|
|
|
|
else if (type == SSH2_MSG_CHANNEL_FAILURE) {
|
|
|
|
error("Request failed on channel %d", id);
|
|
|
|
channel_free(c);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
client_extra_session2_setup(int id, void *arg)
|
|
|
|
{
|
|
|
|
struct confirm_ctx *cctx = arg;
|
2005-07-05 23:44:19 +00:00
|
|
|
const char *display;
|
2004-06-15 00:34:08 +00:00
|
|
|
Channel *c;
|
2004-06-17 15:17:29 +00:00
|
|
|
int i;
|
2004-07-17 06:12:08 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
if (cctx == NULL)
|
|
|
|
fatal("%s: cctx == NULL", __func__);
|
|
|
|
if ((c = channel_lookup(id)) == NULL)
|
|
|
|
fatal("%s: no channel for id %d", __func__, id);
|
|
|
|
|
2005-07-17 07:02:09 +00:00
|
|
|
display = getenv("DISPLAY");
|
2005-07-05 23:44:19 +00:00
|
|
|
if (cctx->want_x_fwd && options.forward_x11 && display != NULL) {
|
|
|
|
char *proto, *data;
|
|
|
|
/* Get reasonable local authentication information. */
|
|
|
|
client_x11_get_proto(display, options.xauth_location,
|
|
|
|
options.forward_x11_trusted, &proto, &data);
|
|
|
|
/* Request forwarding with authentication spoofing. */
|
|
|
|
debug("Requesting X11 forwarding with authentication spoofing.");
|
|
|
|
x11_request_forwarding_with_spoofing(id, display, proto, data);
|
|
|
|
/* XXX wait for reply */
|
|
|
|
}
|
|
|
|
|
|
|
|
if (cctx->want_agent_fwd && options.forward_agent) {
|
|
|
|
debug("Requesting authentication agent forwarding.");
|
|
|
|
channel_request_start(id, "auth-agent-req@openssh.com", 0);
|
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
|
2004-07-17 06:12:08 +00:00
|
|
|
client_session2_setup(id, cctx->want_tty, cctx->want_subsys,
|
2004-06-17 15:17:29 +00:00
|
|
|
cctx->term, &cctx->tio, c->rfd, &cctx->cmd, cctx->env,
|
2004-06-15 00:34:08 +00:00
|
|
|
client_subsystem_reply);
|
2004-06-17 15:19:03 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
c->confirm_ctx = NULL;
|
|
|
|
buffer_free(&cctx->cmd);
|
2004-06-17 15:17:29 +00:00
|
|
|
xfree(cctx->term);
|
|
|
|
if (cctx->env != NULL) {
|
|
|
|
for (i = 0; cctx->env[i] != NULL; i++)
|
|
|
|
xfree(cctx->env[i]);
|
|
|
|
xfree(cctx->env);
|
2004-07-17 06:12:08 +00:00
|
|
|
}
|
2004-06-17 15:17:29 +00:00
|
|
|
xfree(cctx);
|
2004-06-15 00:34:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2006-03-26 03:25:37 +00:00
|
|
|
client_process_control(fd_set *readset)
|
2004-06-15 00:34:08 +00:00
|
|
|
{
|
|
|
|
Buffer m;
|
|
|
|
Channel *c;
|
2005-06-17 02:59:34 +00:00
|
|
|
int client_fd, new_fd[3], ver, allowed;
|
2004-06-15 00:34:08 +00:00
|
|
|
socklen_t addrlen;
|
|
|
|
struct sockaddr_storage addr;
|
|
|
|
struct confirm_ctx *cctx;
|
|
|
|
char *cmd;
|
2005-06-17 02:59:34 +00:00
|
|
|
u_int i, len, env_len, command, flags;
|
2004-06-15 00:34:08 +00:00
|
|
|
uid_t euid;
|
|
|
|
gid_t egid;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Accept connection on control socket
|
|
|
|
*/
|
|
|
|
if (control_fd == -1 || !FD_ISSET(control_fd, readset))
|
|
|
|
return;
|
|
|
|
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
|
|
addrlen = sizeof(addr);
|
|
|
|
if ((client_fd = accept(control_fd,
|
|
|
|
(struct sockaddr*)&addr, &addrlen)) == -1) {
|
|
|
|
error("%s accept: %s", __func__, strerror(errno));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (getpeereid(client_fd, &euid, &egid) < 0) {
|
|
|
|
error("%s getpeereid failed: %s", __func__, strerror(errno));
|
|
|
|
close(client_fd);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if ((euid != 0) && (getuid() != euid)) {
|
|
|
|
error("control mode uid mismatch: peer euid %u != uid %u",
|
|
|
|
(u_int) euid, (u_int) getuid());
|
|
|
|
close(client_fd);
|
|
|
|
return;
|
|
|
|
}
|
2004-06-17 15:19:03 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
unset_nonblock(client_fd);
|
|
|
|
|
2004-11-07 09:06:19 +00:00
|
|
|
/* Read command */
|
2004-06-15 00:34:08 +00:00
|
|
|
buffer_init(&m);
|
2004-11-07 09:06:19 +00:00
|
|
|
if (ssh_msg_recv(client_fd, &m) == -1) {
|
|
|
|
error("%s: client msg_recv failed", __func__);
|
|
|
|
close(client_fd);
|
|
|
|
buffer_free(&m);
|
|
|
|
return;
|
|
|
|
}
|
2005-07-05 23:44:19 +00:00
|
|
|
if ((ver = buffer_get_char(&m)) != SSHMUX_VER) {
|
2004-11-07 09:06:19 +00:00
|
|
|
error("%s: wrong client version %d", __func__, ver);
|
|
|
|
buffer_free(&m);
|
|
|
|
close(client_fd);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
allowed = 1;
|
|
|
|
command = buffer_get_int(&m);
|
|
|
|
flags = buffer_get_int(&m);
|
|
|
|
|
|
|
|
buffer_clear(&m);
|
2004-06-15 00:34:08 +00:00
|
|
|
|
2004-11-07 09:06:19 +00:00
|
|
|
switch (command) {
|
|
|
|
case SSHMUX_COMMAND_OPEN:
|
2005-06-16 03:19:41 +00:00
|
|
|
if (options.control_master == SSHCTL_MASTER_ASK ||
|
|
|
|
options.control_master == SSHCTL_MASTER_AUTO_ASK)
|
2004-11-07 09:06:19 +00:00
|
|
|
allowed = ask_permission("Allow shared connection "
|
|
|
|
"to %s? ", host);
|
|
|
|
/* continue below */
|
|
|
|
break;
|
|
|
|
case SSHMUX_COMMAND_TERMINATE:
|
2005-06-16 03:19:41 +00:00
|
|
|
if (options.control_master == SSHCTL_MASTER_ASK ||
|
|
|
|
options.control_master == SSHCTL_MASTER_AUTO_ASK)
|
2004-11-07 09:06:19 +00:00
|
|
|
allowed = ask_permission("Terminate shared connection "
|
|
|
|
"to %s? ", host);
|
|
|
|
if (allowed)
|
|
|
|
quit_pending = 1;
|
2005-03-14 12:08:12 +00:00
|
|
|
/* FALLTHROUGH */
|
2004-11-07 09:06:19 +00:00
|
|
|
case SSHMUX_COMMAND_ALIVE_CHECK:
|
|
|
|
/* Reply for SSHMUX_COMMAND_TERMINATE and ALIVE_CHECK */
|
|
|
|
buffer_clear(&m);
|
|
|
|
buffer_put_int(&m, allowed);
|
|
|
|
buffer_put_int(&m, getpid());
|
2005-07-05 23:44:19 +00:00
|
|
|
if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) {
|
2004-11-07 09:06:19 +00:00
|
|
|
error("%s: client msg_send failed", __func__);
|
|
|
|
close(client_fd);
|
|
|
|
buffer_free(&m);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
buffer_free(&m);
|
|
|
|
close(client_fd);
|
|
|
|
return;
|
|
|
|
default:
|
|
|
|
error("Unsupported command %d", command);
|
|
|
|
buffer_free(&m);
|
|
|
|
close(client_fd);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reply for SSHMUX_COMMAND_OPEN */
|
|
|
|
buffer_clear(&m);
|
2004-06-17 15:19:03 +00:00
|
|
|
buffer_put_int(&m, allowed);
|
2004-06-15 00:34:08 +00:00
|
|
|
buffer_put_int(&m, getpid());
|
2005-07-05 23:44:19 +00:00
|
|
|
if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) {
|
2004-06-15 00:34:08 +00:00
|
|
|
error("%s: client msg_send failed", __func__);
|
|
|
|
close(client_fd);
|
2004-06-17 15:19:03 +00:00
|
|
|
buffer_free(&m);
|
2004-06-15 00:34:08 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2004-06-17 15:19:03 +00:00
|
|
|
if (!allowed) {
|
|
|
|
error("Refused control connection");
|
|
|
|
close(client_fd);
|
|
|
|
buffer_free(&m);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2004-11-07 09:06:19 +00:00
|
|
|
buffer_clear(&m);
|
2004-06-15 00:34:08 +00:00
|
|
|
if (ssh_msg_recv(client_fd, &m) == -1) {
|
|
|
|
error("%s: client msg_recv failed", __func__);
|
|
|
|
close(client_fd);
|
2004-06-17 15:19:03 +00:00
|
|
|
buffer_free(&m);
|
2004-06-15 00:34:08 +00:00
|
|
|
return;
|
|
|
|
}
|
2005-07-05 23:44:19 +00:00
|
|
|
if ((ver = buffer_get_char(&m)) != SSHMUX_VER) {
|
2004-06-15 00:34:08 +00:00
|
|
|
error("%s: wrong client version %d", __func__, ver);
|
|
|
|
buffer_free(&m);
|
|
|
|
close(client_fd);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2006-03-26 03:19:21 +00:00
|
|
|
cctx = xcalloc(1, sizeof(*cctx));
|
2004-11-07 09:06:19 +00:00
|
|
|
cctx->want_tty = (flags & SSHMUX_FLAG_TTY) != 0;
|
|
|
|
cctx->want_subsys = (flags & SSHMUX_FLAG_SUBSYS) != 0;
|
2005-07-05 23:44:19 +00:00
|
|
|
cctx->want_x_fwd = (flags & SSHMUX_FLAG_X11_FWD) != 0;
|
|
|
|
cctx->want_agent_fwd = (flags & SSHMUX_FLAG_AGENT_FWD) != 0;
|
2004-06-15 00:34:08 +00:00
|
|
|
cctx->term = buffer_get_string(&m, &len);
|
|
|
|
|
|
|
|
cmd = buffer_get_string(&m, &len);
|
|
|
|
buffer_init(&cctx->cmd);
|
|
|
|
buffer_append(&cctx->cmd, cmd, strlen(cmd));
|
|
|
|
|
2004-06-17 15:17:29 +00:00
|
|
|
env_len = buffer_get_int(&m);
|
|
|
|
env_len = MIN(env_len, 4096);
|
|
|
|
debug3("%s: receiving %d env vars", __func__, env_len);
|
|
|
|
if (env_len != 0) {
|
2006-03-26 03:19:21 +00:00
|
|
|
cctx->env = xcalloc(env_len + 1, sizeof(*cctx->env));
|
2004-06-17 15:17:29 +00:00
|
|
|
for (i = 0; i < env_len; i++)
|
|
|
|
cctx->env[i] = buffer_get_string(&m, &len);
|
|
|
|
cctx->env[i] = NULL;
|
|
|
|
}
|
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
debug2("%s: accepted tty %d, subsys %d, cmd %s", __func__,
|
|
|
|
cctx->want_tty, cctx->want_subsys, cmd);
|
2006-06-13 03:00:09 +00:00
|
|
|
xfree(cmd);
|
2004-06-15 00:34:08 +00:00
|
|
|
|
|
|
|
/* Gather fds from client */
|
|
|
|
new_fd[0] = mm_receive_fd(client_fd);
|
|
|
|
new_fd[1] = mm_receive_fd(client_fd);
|
|
|
|
new_fd[2] = mm_receive_fd(client_fd);
|
|
|
|
|
|
|
|
debug2("%s: got fds stdin %d, stdout %d, stderr %d", __func__,
|
|
|
|
new_fd[0], new_fd[1], new_fd[2]);
|
|
|
|
|
|
|
|
/* Try to pick up ttymodes from client before it goes raw */
|
|
|
|
if (cctx->want_tty && tcgetattr(new_fd[0], &cctx->tio) == -1)
|
|
|
|
error("%s: tcgetattr: %s", __func__, strerror(errno));
|
|
|
|
|
2004-11-07 09:06:19 +00:00
|
|
|
/* This roundtrip is just for synchronisation of ttymodes */
|
2004-06-15 00:34:08 +00:00
|
|
|
buffer_clear(&m);
|
2005-07-05 23:44:19 +00:00
|
|
|
if (ssh_msg_send(client_fd, SSHMUX_VER, &m) == -1) {
|
2004-06-15 00:34:08 +00:00
|
|
|
error("%s: client msg_send failed", __func__);
|
|
|
|
close(client_fd);
|
|
|
|
close(new_fd[0]);
|
|
|
|
close(new_fd[1]);
|
|
|
|
close(new_fd[2]);
|
2004-06-17 15:19:03 +00:00
|
|
|
buffer_free(&m);
|
2004-11-07 09:06:19 +00:00
|
|
|
xfree(cctx->term);
|
|
|
|
if (env_len != 0) {
|
|
|
|
for (i = 0; i < env_len; i++)
|
|
|
|
xfree(cctx->env[i]);
|
|
|
|
xfree(cctx->env);
|
|
|
|
}
|
2004-06-15 00:34:08 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
buffer_free(&m);
|
|
|
|
|
|
|
|
/* enable nonblocking unless tty */
|
|
|
|
if (!isatty(new_fd[0]))
|
|
|
|
set_nonblock(new_fd[0]);
|
|
|
|
if (!isatty(new_fd[1]))
|
|
|
|
set_nonblock(new_fd[1]);
|
|
|
|
if (!isatty(new_fd[2]))
|
|
|
|
set_nonblock(new_fd[2]);
|
|
|
|
|
|
|
|
set_nonblock(client_fd);
|
|
|
|
|
2004-07-17 06:12:08 +00:00
|
|
|
c = channel_new("session", SSH_CHANNEL_OPENING,
|
2004-06-15 00:34:08 +00:00
|
|
|
new_fd[0], new_fd[1], new_fd[2],
|
|
|
|
CHAN_SES_WINDOW_DEFAULT, CHAN_SES_PACKET_DEFAULT,
|
|
|
|
CHAN_EXTENDED_WRITE, "client-session", /*nonblock*/0);
|
|
|
|
|
|
|
|
/* XXX */
|
|
|
|
c->ctl_fd = client_fd;
|
|
|
|
|
|
|
|
debug3("%s: channel_new: %d", __func__, c->self);
|
|
|
|
|
|
|
|
channel_send_open(c->self);
|
|
|
|
channel_register_confirm(c->self, client_extra_session2_setup, cctx);
|
|
|
|
}
|
|
|
|
|
2002-03-22 03:24:32 +00:00
|
|
|
static void
|
2002-03-22 03:53:00 +00:00
|
|
|
process_cmdline(void)
|
2002-03-22 03:24:32 +00:00
|
|
|
{
|
|
|
|
void (*handler)(int);
|
2005-03-01 10:24:33 +00:00
|
|
|
char *s, *cmd, *cancel_host;
|
2004-05-24 00:18:05 +00:00
|
|
|
int delete = 0;
|
2002-03-22 03:24:32 +00:00
|
|
|
int local = 0;
|
2005-03-01 10:24:33 +00:00
|
|
|
u_short cancel_port;
|
|
|
|
Forward fwd;
|
2002-03-22 03:24:32 +00:00
|
|
|
|
|
|
|
leave_raw_mode();
|
2002-06-09 19:41:48 +00:00
|
|
|
handler = signal(SIGINT, SIG_IGN);
|
2002-03-22 03:53:00 +00:00
|
|
|
cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
|
2002-03-22 03:24:32 +00:00
|
|
|
if (s == NULL)
|
|
|
|
goto out;
|
|
|
|
while (*s && isspace(*s))
|
|
|
|
s++;
|
2004-05-24 00:18:05 +00:00
|
|
|
if (*s == '-')
|
|
|
|
s++; /* Skip cmdline '-', if any */
|
2004-05-24 00:13:07 +00:00
|
|
|
if (*s == '\0')
|
2002-03-22 03:24:32 +00:00
|
|
|
goto out;
|
2004-05-24 00:18:05 +00:00
|
|
|
|
2004-05-24 00:34:36 +00:00
|
|
|
if (*s == 'h' || *s == 'H' || *s == '?') {
|
2004-05-24 00:18:05 +00:00
|
|
|
logit("Commands:");
|
2006-07-10 10:16:12 +00:00
|
|
|
logit(" -L[bind_address:]port:host:hostport "
|
|
|
|
"Request local forward");
|
|
|
|
logit(" -R[bind_address:]port:host:hostport "
|
|
|
|
"Request remote forward");
|
2006-07-10 10:20:52 +00:00
|
|
|
logit(" -KR[bind_address:]port "
|
2006-07-10 10:16:12 +00:00
|
|
|
"Cancel remote forward");
|
2005-12-13 08:29:02 +00:00
|
|
|
if (!options.permit_local_command)
|
|
|
|
goto out;
|
2006-07-10 10:16:12 +00:00
|
|
|
logit(" !args "
|
|
|
|
"Execute local command");
|
2005-12-13 08:29:02 +00:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (*s == '!' && options.permit_local_command) {
|
|
|
|
s++;
|
|
|
|
ssh_local_cmd(s);
|
2004-05-24 00:18:05 +00:00
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (*s == 'K') {
|
|
|
|
delete = 1;
|
|
|
|
s++;
|
|
|
|
}
|
|
|
|
if (*s != 'L' && *s != 'R') {
|
2003-04-09 10:59:48 +00:00
|
|
|
logit("Invalid command.");
|
2002-03-22 03:24:32 +00:00
|
|
|
goto out;
|
|
|
|
}
|
2004-05-24 00:18:05 +00:00
|
|
|
if (*s == 'L')
|
2002-03-22 03:24:32 +00:00
|
|
|
local = 1;
|
2004-05-24 00:18:05 +00:00
|
|
|
if (local && delete) {
|
|
|
|
logit("Not supported.");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if ((!local || delete) && !compat20) {
|
2003-04-09 10:59:48 +00:00
|
|
|
logit("Not supported for SSH protocol version 1.");
|
2002-03-22 03:24:32 +00:00
|
|
|
goto out;
|
|
|
|
}
|
2004-05-24 00:18:05 +00:00
|
|
|
|
|
|
|
s++;
|
2002-03-22 03:24:32 +00:00
|
|
|
while (*s && isspace(*s))
|
|
|
|
s++;
|
|
|
|
|
2004-05-24 00:18:05 +00:00
|
|
|
if (delete) {
|
2005-03-01 10:24:33 +00:00
|
|
|
cancel_port = 0;
|
|
|
|
cancel_host = hpdelim(&s); /* may be NULL */
|
|
|
|
if (s != NULL) {
|
|
|
|
cancel_port = a2port(s);
|
|
|
|
cancel_host = cleanhostname(cancel_host);
|
|
|
|
} else {
|
|
|
|
cancel_port = a2port(cancel_host);
|
|
|
|
cancel_host = NULL;
|
2004-05-24 00:18:05 +00:00
|
|
|
}
|
2005-03-01 10:24:33 +00:00
|
|
|
if (cancel_port == 0) {
|
|
|
|
logit("Bad forwarding close port");
|
2002-03-22 03:24:32 +00:00
|
|
|
goto out;
|
|
|
|
}
|
2005-03-01 10:24:33 +00:00
|
|
|
channel_request_rforward_cancel(cancel_host, cancel_port);
|
2004-05-24 00:18:05 +00:00
|
|
|
} else {
|
2005-03-01 10:24:33 +00:00
|
|
|
if (!parse_forward(&fwd, s)) {
|
2004-05-24 00:18:05 +00:00
|
|
|
logit("Bad forwarding specification.");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
if (local) {
|
2005-03-01 10:24:33 +00:00
|
|
|
if (channel_setup_local_fwd_listener(fwd.listen_host,
|
|
|
|
fwd.listen_port, fwd.connect_host,
|
|
|
|
fwd.connect_port, options.gateway_ports) < 0) {
|
2004-05-24 00:18:05 +00:00
|
|
|
logit("Port forwarding failed.");
|
|
|
|
goto out;
|
|
|
|
}
|
2005-03-01 10:24:33 +00:00
|
|
|
} else {
|
2006-07-12 12:17:10 +00:00
|
|
|
if (channel_request_remote_forwarding(fwd.listen_host,
|
2005-03-01 10:24:33 +00:00
|
|
|
fwd.listen_port, fwd.connect_host,
|
2006-07-12 12:17:10 +00:00
|
|
|
fwd.connect_port) < 0) {
|
|
|
|
logit("Port forwarding failed.");
|
|
|
|
goto out;
|
|
|
|
}
|
2005-03-01 10:24:33 +00:00
|
|
|
}
|
|
|
|
|
2004-05-24 00:18:05 +00:00
|
|
|
logit("Forwarding port.");
|
|
|
|
}
|
|
|
|
|
2002-03-22 03:24:32 +00:00
|
|
|
out:
|
|
|
|
signal(SIGINT, handler);
|
|
|
|
enter_raw_mode();
|
|
|
|
if (cmd)
|
|
|
|
xfree(cmd);
|
|
|
|
}
|
|
|
|
|
2000-08-23 00:46:23 +00:00
|
|
|
/* process the characters one by one */
|
2001-06-25 05:01:22 +00:00
|
|
|
static int
|
2000-08-23 00:46:23 +00:00
|
|
|
process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
|
|
|
|
{
|
|
|
|
char string[1024];
|
|
|
|
pid_t pid;
|
|
|
|
int bytes = 0;
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int i;
|
|
|
|
u_char ch;
|
2000-08-23 00:46:23 +00:00
|
|
|
char *s;
|
|
|
|
|
2005-06-17 02:59:34 +00:00
|
|
|
if (len <= 0)
|
|
|
|
return (0);
|
|
|
|
|
|
|
|
for (i = 0; i < (u_int)len; i++) {
|
2000-08-23 00:46:23 +00:00
|
|
|
/* Get one character at a time. */
|
|
|
|
ch = buf[i];
|
|
|
|
|
|
|
|
if (escape_pending) {
|
|
|
|
/* We have previously seen an escape character. */
|
|
|
|
/* Clear the flag now. */
|
|
|
|
escape_pending = 0;
|
|
|
|
|
|
|
|
/* Process the escaped character. */
|
|
|
|
switch (ch) {
|
|
|
|
case '.':
|
|
|
|
/* Terminate the connection. */
|
|
|
|
snprintf(string, sizeof string, "%c.\r\n", escape_char);
|
|
|
|
buffer_append(berr, string, strlen(string));
|
|
|
|
|
|
|
|
quit_pending = 1;
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
case 'Z' - 64:
|
|
|
|
/* Suspend the program. */
|
|
|
|
/* Print a message to that effect to the user. */
|
|
|
|
snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char);
|
|
|
|
buffer_append(berr, string, strlen(string));
|
|
|
|
|
|
|
|
/* Restore terminal modes and suspend. */
|
|
|
|
client_suspend_self(bin, bout, berr);
|
|
|
|
|
|
|
|
/* We have been continued. */
|
|
|
|
continue;
|
|
|
|
|
2003-05-15 00:20:13 +00:00
|
|
|
case 'B':
|
|
|
|
if (compat20) {
|
|
|
|
snprintf(string, sizeof string,
|
|
|
|
"%cB\r\n", escape_char);
|
|
|
|
buffer_append(berr, string,
|
|
|
|
strlen(string));
|
|
|
|
channel_request_start(session_ident,
|
|
|
|
"break", 0);
|
|
|
|
packet_put_int(1000);
|
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
continue;
|
|
|
|
|
2001-04-04 02:03:04 +00:00
|
|
|
case 'R':
|
2001-04-05 23:34:29 +00:00
|
|
|
if (compat20) {
|
|
|
|
if (datafellows & SSH_BUG_NOREKEY)
|
2003-04-09 10:59:48 +00:00
|
|
|
logit("Server does not support re-keying");
|
2001-04-05 23:34:29 +00:00
|
|
|
else
|
|
|
|
need_rekeying = 1;
|
|
|
|
}
|
2001-04-04 02:03:04 +00:00
|
|
|
continue;
|
|
|
|
|
2000-08-23 00:46:23 +00:00
|
|
|
case '&':
|
|
|
|
/*
|
|
|
|
* Detach the program (continue to serve connections,
|
|
|
|
* but put in background and no more new connections).
|
|
|
|
*/
|
|
|
|
/* Restore tty modes. */
|
|
|
|
leave_raw_mode();
|
|
|
|
|
|
|
|
/* Stop listening for new connections. */
|
2001-11-11 23:52:25 +00:00
|
|
|
channel_stop_listening();
|
2000-08-23 00:46:23 +00:00
|
|
|
|
2001-11-11 23:52:25 +00:00
|
|
|
snprintf(string, sizeof string,
|
|
|
|
"%c& [backgrounded]\n", escape_char);
|
|
|
|
buffer_append(berr, string, strlen(string));
|
2000-08-23 00:46:23 +00:00
|
|
|
|
|
|
|
/* Fork into background. */
|
|
|
|
pid = fork();
|
|
|
|
if (pid < 0) {
|
|
|
|
error("fork: %.100s", strerror(errno));
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (pid != 0) { /* This is the parent. */
|
|
|
|
/* The parent just exits. */
|
|
|
|
exit(0);
|
|
|
|
}
|
|
|
|
/* The child continues serving connections. */
|
2001-11-11 23:52:25 +00:00
|
|
|
if (compat20) {
|
|
|
|
buffer_append(bin, "\004", 1);
|
|
|
|
/* fake EOF on stdin */
|
|
|
|
return -1;
|
|
|
|
} else if (!stdin_eof) {
|
|
|
|
/*
|
|
|
|
* Sending SSH_CMSG_EOF alone does not always appear
|
|
|
|
* to be enough. So we try to send an EOF character
|
|
|
|
* first.
|
|
|
|
*/
|
|
|
|
packet_start(SSH_CMSG_STDIN_DATA);
|
|
|
|
packet_put_string("\004", 1);
|
|
|
|
packet_send();
|
|
|
|
/* Close stdin. */
|
|
|
|
stdin_eof = 1;
|
|
|
|
if (buffer_len(bin) == 0) {
|
|
|
|
packet_start(SSH_CMSG_EOF);
|
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
continue;
|
2000-08-23 00:46:23 +00:00
|
|
|
|
|
|
|
case '?':
|
|
|
|
snprintf(string, sizeof string,
|
|
|
|
"%c?\r\n\
|
|
|
|
Supported escape sequences:\r\n\
|
2002-09-04 06:32:10 +00:00
|
|
|
%c. - terminate connection\r\n\
|
2003-05-15 00:20:13 +00:00
|
|
|
%cB - send a BREAK to the remote system\r\n\
|
2002-09-04 06:32:10 +00:00
|
|
|
%cC - open a command line\r\n\
|
|
|
|
%cR - Request rekey (SSH protocol 2 only)\r\n\
|
|
|
|
%c^Z - suspend ssh\r\n\
|
|
|
|
%c# - list forwarded connections\r\n\
|
|
|
|
%c& - background ssh (when waiting for connections to terminate)\r\n\
|
|
|
|
%c? - this message\r\n\
|
|
|
|
%c%c - send the escape character by typing it twice\r\n\
|
2000-08-23 00:46:23 +00:00
|
|
|
(Note that escapes are only recognized immediately after newline.)\r\n",
|
2002-09-04 06:32:10 +00:00
|
|
|
escape_char, escape_char, escape_char, escape_char,
|
|
|
|
escape_char, escape_char, escape_char, escape_char,
|
2003-05-15 00:20:13 +00:00
|
|
|
escape_char, escape_char, escape_char);
|
2000-08-23 00:46:23 +00:00
|
|
|
buffer_append(berr, string, strlen(string));
|
|
|
|
continue;
|
|
|
|
|
|
|
|
case '#':
|
|
|
|
snprintf(string, sizeof string, "%c#\r\n", escape_char);
|
|
|
|
buffer_append(berr, string, strlen(string));
|
|
|
|
s = channel_open_message();
|
|
|
|
buffer_append(berr, s, strlen(s));
|
|
|
|
xfree(s);
|
|
|
|
continue;
|
|
|
|
|
2002-03-22 03:24:32 +00:00
|
|
|
case 'C':
|
2002-03-22 03:53:00 +00:00
|
|
|
process_cmdline();
|
2002-03-22 03:24:32 +00:00
|
|
|
continue;
|
|
|
|
|
2000-08-23 00:46:23 +00:00
|
|
|
default:
|
|
|
|
if (ch != escape_char) {
|
|
|
|
buffer_put_char(bin, escape_char);
|
|
|
|
bytes++;
|
|
|
|
}
|
|
|
|
/* Escaped characters fall through here */
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* The previous character was not an escape char. Check if this
|
|
|
|
* is an escape.
|
|
|
|
*/
|
|
|
|
if (last_was_cr && ch == escape_char) {
|
|
|
|
/* It is. Set the flag and continue to next character. */
|
|
|
|
escape_pending = 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Normal character. Record whether it was a newline,
|
|
|
|
* and append it to the buffer.
|
|
|
|
*/
|
|
|
|
last_was_cr = (ch == '\r' || ch == '\n');
|
|
|
|
buffer_put_char(bin, ch);
|
|
|
|
bytes++;
|
|
|
|
}
|
|
|
|
return bytes;
|
|
|
|
}
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2006-03-26 03:25:37 +00:00
|
|
|
client_process_input(fd_set *readset)
|
2000-04-06 02:32:37 +00:00
|
|
|
{
|
2000-04-19 21:42:21 +00:00
|
|
|
int len;
|
2000-08-23 00:46:23 +00:00
|
|
|
char buf[8192];
|
2000-04-06 02:32:37 +00:00
|
|
|
|
1999-11-24 13:26:21 +00:00
|
|
|
/* Read input from stdin. */
|
|
|
|
if (FD_ISSET(fileno(stdin), readset)) {
|
|
|
|
/* Read as much as possible. */
|
|
|
|
len = read(fileno(stdin), buf, sizeof(buf));
|
2001-04-17 18:09:42 +00:00
|
|
|
if (len < 0 && (errno == EAGAIN || errno == EINTR))
|
|
|
|
return; /* we'll try again later */
|
1999-11-24 13:26:21 +00:00
|
|
|
if (len <= 0) {
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Received EOF or error. They are treated
|
|
|
|
* similarly, except that an error message is printed
|
|
|
|
* if it was an error condition.
|
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
if (len < 0) {
|
|
|
|
snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
|
|
|
|
buffer_append(&stderr_buffer, buf, strlen(buf));
|
|
|
|
}
|
|
|
|
/* Mark that we have seen EOF. */
|
|
|
|
stdin_eof = 1;
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Send an EOF message to the server unless there is
|
|
|
|
* data in the buffer. If there is data in the
|
|
|
|
* buffer, no message will be sent now. Code
|
|
|
|
* elsewhere will send the EOF when the buffer
|
|
|
|
* becomes empty if stdin_eof is set.
|
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
if (buffer_len(&stdin_buffer) == 0) {
|
1999-10-27 03:42:43 +00:00
|
|
|
packet_start(SSH_CMSG_EOF);
|
|
|
|
packet_send();
|
1999-11-24 13:26:21 +00:00
|
|
|
}
|
2001-06-05 20:32:21 +00:00
|
|
|
} else if (escape_char == SSH_ESCAPECHAR_NONE) {
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Normal successful read, and no escape character.
|
|
|
|
* Just append the data to buffer.
|
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
buffer_append(&stdin_buffer, buf, len);
|
|
|
|
} else {
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Normal, successful read. But we have an escape character
|
|
|
|
* and have to process the characters one by one.
|
|
|
|
*/
|
2001-03-05 06:14:02 +00:00
|
|
|
if (process_escapes(&stdin_buffer, &stdout_buffer,
|
|
|
|
&stderr_buffer, buf, len) == -1)
|
2000-08-23 00:46:23 +00:00
|
|
|
return;
|
1999-11-24 13:26:21 +00:00
|
|
|
}
|
|
|
|
}
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2006-03-26 03:25:37 +00:00
|
|
|
client_process_output(fd_set *writeset)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
1999-11-24 13:26:21 +00:00
|
|
|
int len;
|
|
|
|
char buf[100];
|
|
|
|
|
|
|
|
/* Write buffered output to stdout. */
|
|
|
|
if (FD_ISSET(fileno(stdout), writeset)) {
|
|
|
|
/* Write as much data as possible. */
|
|
|
|
len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
|
1999-12-07 04:38:31 +00:00
|
|
|
buffer_len(&stdout_buffer));
|
1999-11-24 13:26:21 +00:00
|
|
|
if (len <= 0) {
|
2001-04-17 18:09:42 +00:00
|
|
|
if (errno == EINTR || errno == EAGAIN)
|
1999-11-24 13:26:21 +00:00
|
|
|
len = 0;
|
|
|
|
else {
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* An error or EOF was encountered. Put an
|
|
|
|
* error message to stderr buffer.
|
|
|
|
*/
|
1999-11-24 13:26:21 +00:00
|
|
|
snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
|
|
|
|
buffer_append(&stderr_buffer, buf, strlen(buf));
|
|
|
|
quit_pending = 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Consume printed data from the buffer. */
|
|
|
|
buffer_consume(&stdout_buffer, len);
|
2001-04-05 23:26:32 +00:00
|
|
|
stdout_bytes += len;
|
1999-11-24 13:26:21 +00:00
|
|
|
}
|
|
|
|
/* Write buffered output to stderr. */
|
|
|
|
if (FD_ISSET(fileno(stderr), writeset)) {
|
|
|
|
/* Write as much data as possible. */
|
|
|
|
len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
|
1999-12-07 04:38:31 +00:00
|
|
|
buffer_len(&stderr_buffer));
|
1999-11-24 13:26:21 +00:00
|
|
|
if (len <= 0) {
|
2001-04-17 18:09:42 +00:00
|
|
|
if (errno == EINTR || errno == EAGAIN)
|
1999-11-24 13:26:21 +00:00
|
|
|
len = 0;
|
|
|
|
else {
|
1999-11-25 00:54:57 +00:00
|
|
|
/* EOF or error, but can't even print error message. */
|
1999-11-24 13:26:21 +00:00
|
|
|
quit_pending = 1;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Consume printed characters from the buffer. */
|
|
|
|
buffer_consume(&stderr_buffer, len);
|
2001-04-05 23:26:32 +00:00
|
|
|
stderr_bytes += len;
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2000-04-01 01:09:21 +00:00
|
|
|
/*
|
|
|
|
* Get packets from the connection input buffer, and process them as long as
|
|
|
|
* there are packets available.
|
|
|
|
*
|
|
|
|
* Any unknown packets received during the actual
|
|
|
|
* session cause the session to terminate. This is
|
|
|
|
* intended to make debugging easier since no
|
|
|
|
* confirmations are sent. Any compatible protocol
|
|
|
|
* extensions must be negotiated during the
|
|
|
|
* preparatory phase.
|
|
|
|
*/
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_process_buffered_input_packets(void)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
2001-04-04 02:03:04 +00:00
|
|
|
dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
|
2000-04-01 01:09:21 +00:00
|
|
|
}
|
|
|
|
|
2000-08-23 00:46:23 +00:00
|
|
|
/* scan buf[] for '~' before sending data to the peer */
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static int
|
2000-08-23 00:46:23 +00:00
|
|
|
simple_escape_filter(Channel *c, char *buf, int len)
|
|
|
|
{
|
|
|
|
/* XXX we assume c->extended is writeable */
|
|
|
|
return process_escapes(&c->input, &c->output, &c->extended, buf, len);
|
|
|
|
}
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-04-05 23:37:36 +00:00
|
|
|
client_channel_closed(int id, void *arg)
|
|
|
|
{
|
2001-10-12 01:35:04 +00:00
|
|
|
channel_cancel_cleanup(id);
|
2001-04-05 23:37:36 +00:00
|
|
|
session_closed = 1;
|
2003-09-22 11:16:05 +00:00
|
|
|
leave_raw_mode();
|
2001-04-05 23:37:36 +00:00
|
|
|
}
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Implements the interactive session with the server. This is called after
|
|
|
|
* the user has been authenticated, and a command has been started on the
|
2001-06-05 20:32:21 +00:00
|
|
|
* remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
|
|
|
|
* used as an escape character for terminating or suspending the session.
|
1999-11-25 00:54:57 +00:00
|
|
|
*/
|
1999-10-27 03:42:43 +00:00
|
|
|
|
2000-04-16 01:18:38 +00:00
|
|
|
int
|
2000-08-23 00:46:23 +00:00
|
|
|
client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
|
1999-10-27 03:42:43 +00:00
|
|
|
{
|
2001-01-29 22:14:00 +00:00
|
|
|
fd_set *readset = NULL, *writeset = NULL;
|
1999-11-24 13:26:21 +00:00
|
|
|
double start_time, total_time;
|
2004-08-13 11:18:00 +00:00
|
|
|
int max_fd = 0, max_fd2 = 0, len, rekeying = 0;
|
|
|
|
u_int nalloc = 0;
|
1999-11-24 13:26:21 +00:00
|
|
|
char buf[100];
|
|
|
|
|
|
|
|
debug("Entering interactive session.");
|
|
|
|
|
|
|
|
start_time = get_current_time();
|
|
|
|
|
|
|
|
/* Initialize variables. */
|
|
|
|
escape_pending = 0;
|
|
|
|
last_was_cr = 1;
|
|
|
|
exit_status = -1;
|
|
|
|
stdin_eof = 0;
|
|
|
|
buffer_high = 64 * 1024;
|
|
|
|
connection_in = packet_get_connection_in();
|
|
|
|
connection_out = packet_get_connection_out();
|
2001-01-29 22:14:00 +00:00
|
|
|
max_fd = MAX(connection_in, connection_out);
|
2004-06-15 00:34:08 +00:00
|
|
|
if (control_fd != -1)
|
|
|
|
max_fd = MAX(max_fd, control_fd);
|
2001-01-29 22:14:00 +00:00
|
|
|
|
|
|
|
if (!compat20) {
|
2001-04-16 02:01:25 +00:00
|
|
|
/* enable nonblocking unless tty */
|
|
|
|
if (!isatty(fileno(stdin)))
|
|
|
|
set_nonblock(fileno(stdin));
|
|
|
|
if (!isatty(fileno(stdout)))
|
|
|
|
set_nonblock(fileno(stdout));
|
|
|
|
if (!isatty(fileno(stderr)))
|
|
|
|
set_nonblock(fileno(stderr));
|
2001-01-29 22:14:00 +00:00
|
|
|
max_fd = MAX(max_fd, fileno(stdin));
|
|
|
|
max_fd = MAX(max_fd, fileno(stdout));
|
|
|
|
max_fd = MAX(max_fd, fileno(stderr));
|
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
stdin_bytes = 0;
|
|
|
|
stdout_bytes = 0;
|
|
|
|
stderr_bytes = 0;
|
|
|
|
quit_pending = 0;
|
|
|
|
escape_char = escape_char_arg;
|
|
|
|
|
|
|
|
/* Initialize buffers. */
|
|
|
|
buffer_init(&stdin_buffer);
|
|
|
|
buffer_init(&stdout_buffer);
|
|
|
|
buffer_init(&stderr_buffer);
|
|
|
|
|
2000-04-01 01:09:21 +00:00
|
|
|
client_init_dispatch();
|
|
|
|
|
2002-12-23 02:01:55 +00:00
|
|
|
/*
|
|
|
|
* Set signal handlers, (e.g. to restore non-blocking mode)
|
|
|
|
* but don't overwrite SIG_IGN, matches behaviour from rsh(1)
|
|
|
|
*/
|
2004-11-05 09:02:16 +00:00
|
|
|
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
|
|
|
|
signal(SIGHUP, signal_handler);
|
2002-12-23 02:01:55 +00:00
|
|
|
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
|
|
|
signal(SIGINT, signal_handler);
|
|
|
|
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
|
|
|
|
signal(SIGQUIT, signal_handler);
|
|
|
|
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
|
|
|
|
signal(SIGTERM, signal_handler);
|
2004-11-05 09:35:44 +00:00
|
|
|
signal(SIGWINCH, window_change_handler);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
if (have_pty)
|
|
|
|
enter_raw_mode();
|
|
|
|
|
2001-02-09 01:34:36 +00:00
|
|
|
if (compat20) {
|
|
|
|
session_ident = ssh2_chan_id;
|
2001-06-05 20:32:21 +00:00
|
|
|
if (escape_char != SSH_ESCAPECHAR_NONE)
|
2001-02-09 01:34:36 +00:00
|
|
|
channel_register_filter(session_ident,
|
2005-12-31 05:22:32 +00:00
|
|
|
simple_escape_filter, NULL);
|
2001-04-05 23:37:36 +00:00
|
|
|
if (session_ident != -1)
|
|
|
|
channel_register_cleanup(session_ident,
|
2005-11-05 03:52:50 +00:00
|
|
|
client_channel_closed, 0);
|
2001-02-09 01:34:36 +00:00
|
|
|
} else {
|
|
|
|
/* Check if we should immediately send eof on stdin. */
|
2000-04-06 02:32:37 +00:00
|
|
|
client_check_initial_eof_on_stdin();
|
2001-02-09 01:34:36 +00:00
|
|
|
}
|
2000-08-23 00:46:23 +00:00
|
|
|
|
1999-11-24 13:26:21 +00:00
|
|
|
/* Main loop of the client for the interactive session mode. */
|
|
|
|
while (!quit_pending) {
|
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/* Process buffered packets sent by the server. */
|
1999-11-24 13:26:21 +00:00
|
|
|
client_process_buffered_input_packets();
|
|
|
|
|
2001-04-05 23:37:36 +00:00
|
|
|
if (compat20 && session_closed && !channel_still_open())
|
2000-04-06 02:32:37 +00:00
|
|
|
break;
|
2001-04-05 23:37:36 +00:00
|
|
|
|
|
|
|
rekeying = (xxx_kex != NULL && !xxx_kex->done);
|
2000-04-06 02:32:37 +00:00
|
|
|
|
2001-04-04 23:46:07 +00:00
|
|
|
if (rekeying) {
|
|
|
|
debug("rekeying in progress");
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Make packets of buffered stdin data, and buffer
|
|
|
|
* them for sending to the server.
|
|
|
|
*/
|
|
|
|
if (!compat20)
|
|
|
|
client_make_packets_from_stdin_data();
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2001-04-04 23:46:07 +00:00
|
|
|
/*
|
|
|
|
* Make packets from buffered channel data, and
|
|
|
|
* enqueue them for sending to the server.
|
|
|
|
*/
|
|
|
|
if (packet_not_very_much_data_to_write())
|
|
|
|
channel_output_poll();
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2001-04-04 23:46:07 +00:00
|
|
|
/*
|
|
|
|
* Check if the window size has changed, and buffer a
|
|
|
|
* message about it to the server if so.
|
|
|
|
*/
|
|
|
|
client_check_window_change();
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2001-04-04 23:46:07 +00:00
|
|
|
if (quit_pending)
|
|
|
|
break;
|
|
|
|
}
|
1999-11-25 00:54:57 +00:00
|
|
|
/*
|
|
|
|
* Wait until we have something to do (something becomes
|
|
|
|
* available on one of the descriptors).
|
|
|
|
*/
|
2001-07-18 16:01:46 +00:00
|
|
|
max_fd2 = max_fd;
|
2001-04-04 23:46:07 +00:00
|
|
|
client_wait_until_can_do_something(&readset, &writeset,
|
2001-07-18 16:01:46 +00:00
|
|
|
&max_fd2, &nalloc, rekeying);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
if (quit_pending)
|
|
|
|
break;
|
|
|
|
|
2001-04-04 23:46:07 +00:00
|
|
|
/* Do channel operations unless rekeying in progress. */
|
|
|
|
if (!rekeying) {
|
|
|
|
channel_after_select(readset, writeset);
|
2003-04-09 10:50:06 +00:00
|
|
|
if (need_rekeying || packet_need_rekeying()) {
|
|
|
|
debug("need rekeying");
|
2001-04-04 23:46:07 +00:00
|
|
|
xxx_kex->done = 0;
|
|
|
|
kex_send_kexinit(xxx_kex);
|
|
|
|
need_rekeying = 0;
|
|
|
|
}
|
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2000-04-06 02:32:37 +00:00
|
|
|
/* Buffer input from the connection. */
|
2001-01-29 22:14:00 +00:00
|
|
|
client_process_net_input(readset);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
/* Accept control connections. */
|
|
|
|
client_process_control(readset);
|
|
|
|
|
2000-04-06 02:32:37 +00:00
|
|
|
if (quit_pending)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (!compat20) {
|
|
|
|
/* Buffer data from stdin */
|
2001-01-29 22:14:00 +00:00
|
|
|
client_process_input(readset);
|
2000-04-06 02:32:37 +00:00
|
|
|
/*
|
|
|
|
* Process output to stdout and stderr. Output to
|
|
|
|
* the connection is processed elsewhere (above).
|
|
|
|
*/
|
2001-01-29 22:14:00 +00:00
|
|
|
client_process_output(writeset);
|
2000-04-06 02:32:37 +00:00
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
|
1999-11-25 00:54:57 +00:00
|
|
|
/* Send as much buffered packet data as possible to the sender. */
|
2001-01-29 22:14:00 +00:00
|
|
|
if (FD_ISSET(connection_out, writeset))
|
1999-11-24 13:26:21 +00:00
|
|
|
packet_write_poll();
|
|
|
|
}
|
2001-01-29 22:14:00 +00:00
|
|
|
if (readset)
|
|
|
|
xfree(readset);
|
|
|
|
if (writeset)
|
|
|
|
xfree(writeset);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* Terminate the session. */
|
|
|
|
|
|
|
|
/* Stop watching for window change. */
|
2004-11-05 09:35:44 +00:00
|
|
|
signal(SIGWINCH, SIG_DFL);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2001-06-21 03:19:23 +00:00
|
|
|
channel_free_all();
|
1999-11-24 13:26:21 +00:00
|
|
|
|
2001-06-09 01:27:31 +00:00
|
|
|
if (have_pty)
|
|
|
|
leave_raw_mode();
|
2001-05-12 00:08:37 +00:00
|
|
|
|
|
|
|
/* restore blocking io */
|
|
|
|
if (!isatty(fileno(stdin)))
|
|
|
|
unset_nonblock(fileno(stdin));
|
|
|
|
if (!isatty(fileno(stdout)))
|
|
|
|
unset_nonblock(fileno(stdout));
|
|
|
|
if (!isatty(fileno(stderr)))
|
|
|
|
unset_nonblock(fileno(stderr));
|
|
|
|
|
2003-12-17 05:31:53 +00:00
|
|
|
/*
|
|
|
|
* If there was no shell or command requested, there will be no remote
|
|
|
|
* exit status to be returned. In that case, clear error code if the
|
|
|
|
* connection was deliberately terminated at this end.
|
|
|
|
*/
|
|
|
|
if (no_shell_flag && received_signal == SIGTERM) {
|
|
|
|
received_signal = 0;
|
|
|
|
exit_status = 0;
|
|
|
|
}
|
|
|
|
|
2003-09-22 11:16:05 +00:00
|
|
|
if (received_signal)
|
2001-12-06 17:52:16 +00:00
|
|
|
fatal("Killed by signal %d.", (int) received_signal);
|
2001-06-09 01:27:31 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* In interactive mode (with pseudo tty) display a message indicating
|
|
|
|
* that the connection has been closed.
|
|
|
|
*/
|
|
|
|
if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) {
|
|
|
|
snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host);
|
|
|
|
buffer_append(&stderr_buffer, buf, strlen(buf));
|
|
|
|
}
|
|
|
|
|
1999-11-24 13:26:21 +00:00
|
|
|
/* Output any buffered data for stdout. */
|
2001-05-12 00:08:37 +00:00
|
|
|
while (buffer_len(&stdout_buffer) > 0) {
|
|
|
|
len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
|
1999-12-07 04:38:31 +00:00
|
|
|
buffer_len(&stdout_buffer));
|
2001-05-12 00:08:37 +00:00
|
|
|
if (len <= 0) {
|
1999-11-24 13:26:21 +00:00
|
|
|
error("Write failed flushing stdout buffer.");
|
2001-05-12 00:08:37 +00:00
|
|
|
break;
|
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
buffer_consume(&stdout_buffer, len);
|
2001-04-05 23:26:32 +00:00
|
|
|
stdout_bytes += len;
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* Output any buffered data for stderr. */
|
2001-05-12 00:08:37 +00:00
|
|
|
while (buffer_len(&stderr_buffer) > 0) {
|
|
|
|
len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
|
1999-12-07 04:38:31 +00:00
|
|
|
buffer_len(&stderr_buffer));
|
2001-05-12 00:08:37 +00:00
|
|
|
if (len <= 0) {
|
1999-11-24 13:26:21 +00:00
|
|
|
error("Write failed flushing stderr buffer.");
|
2001-05-12 00:08:37 +00:00
|
|
|
break;
|
|
|
|
}
|
1999-11-24 13:26:21 +00:00
|
|
|
buffer_consume(&stderr_buffer, len);
|
2001-04-05 23:26:32 +00:00
|
|
|
stderr_bytes += len;
|
1999-11-24 13:26:21 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Clear and free any buffers. */
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
|
|
buffer_free(&stdin_buffer);
|
|
|
|
buffer_free(&stdout_buffer);
|
|
|
|
buffer_free(&stderr_buffer);
|
|
|
|
|
|
|
|
/* Report bytes transferred, and transfer rates. */
|
|
|
|
total_time = get_current_time() - start_time;
|
|
|
|
debug("Transferred: stdin %lu, stdout %lu, stderr %lu bytes in %.1f seconds",
|
2001-12-21 03:45:46 +00:00
|
|
|
stdin_bytes, stdout_bytes, stderr_bytes, total_time);
|
1999-11-24 13:26:21 +00:00
|
|
|
if (total_time > 0)
|
|
|
|
debug("Bytes per second: stdin %.1f, stdout %.1f, stderr %.1f",
|
2001-12-21 03:45:46 +00:00
|
|
|
stdin_bytes / total_time, stdout_bytes / total_time,
|
|
|
|
stderr_bytes / total_time);
|
1999-11-24 13:26:21 +00:00
|
|
|
|
|
|
|
/* Return the exit status of the program. */
|
|
|
|
debug("Exit status %d", exit_status);
|
|
|
|
return exit_status;
|
1999-10-27 03:42:43 +00:00
|
|
|
}
|
2000-04-01 01:09:21 +00:00
|
|
|
|
|
|
|
/*********/
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2002-01-22 12:17:30 +00:00
|
|
|
client_input_stdout_data(int type, u_int32_t seq, void *ctxt)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int data_len;
|
2000-04-01 01:09:21 +00:00
|
|
|
char *data = packet_get_string(&data_len);
|
2002-01-22 12:11:40 +00:00
|
|
|
packet_check_eom();
|
2000-04-01 01:09:21 +00:00
|
|
|
buffer_append(&stdout_buffer, data, data_len);
|
|
|
|
memset(data, 0, data_len);
|
|
|
|
xfree(data);
|
|
|
|
}
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2002-01-22 12:17:30 +00:00
|
|
|
client_input_stderr_data(int type, u_int32_t seq, void *ctxt)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
2000-12-22 01:43:59 +00:00
|
|
|
u_int data_len;
|
2000-04-01 01:09:21 +00:00
|
|
|
char *data = packet_get_string(&data_len);
|
2002-01-22 12:11:40 +00:00
|
|
|
packet_check_eom();
|
2000-04-01 01:09:21 +00:00
|
|
|
buffer_append(&stderr_buffer, data, data_len);
|
|
|
|
memset(data, 0, data_len);
|
|
|
|
xfree(data);
|
|
|
|
}
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2002-01-22 12:17:30 +00:00
|
|
|
client_input_exit_status(int type, u_int32_t seq, void *ctxt)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
|
|
|
exit_status = packet_get_int();
|
2002-01-22 12:11:40 +00:00
|
|
|
packet_check_eom();
|
2000-04-01 01:09:21 +00:00
|
|
|
/* Acknowledge the exit. */
|
|
|
|
packet_start(SSH_CMSG_EXIT_CONFIRMATION);
|
|
|
|
packet_send();
|
|
|
|
/*
|
|
|
|
* Must wait for packet to be sent since we are
|
|
|
|
* exiting the loop.
|
|
|
|
*/
|
|
|
|
packet_write_wait();
|
|
|
|
/* Flag that we want to exit. */
|
|
|
|
quit_pending = 1;
|
|
|
|
}
|
2003-10-02 06:17:00 +00:00
|
|
|
static void
|
|
|
|
client_input_agent_open(int type, u_int32_t seq, void *ctxt)
|
|
|
|
{
|
|
|
|
Channel *c = NULL;
|
|
|
|
int remote_id, sock;
|
|
|
|
|
|
|
|
/* Read the remote channel number from the message. */
|
|
|
|
remote_id = packet_get_int();
|
|
|
|
packet_check_eom();
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get a connection to the local authentication agent (this may again
|
|
|
|
* get forwarded).
|
|
|
|
*/
|
|
|
|
sock = ssh_get_authentication_socket();
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we could not connect the agent, send an error message back to
|
|
|
|
* the server. This should never happen unless the agent dies,
|
|
|
|
* because authentication forwarding is only enabled if we have an
|
|
|
|
* agent.
|
|
|
|
*/
|
|
|
|
if (sock >= 0) {
|
|
|
|
c = channel_new("", SSH_CHANNEL_OPEN, sock, sock,
|
|
|
|
-1, 0, 0, 0, "authentication agent connection", 1);
|
|
|
|
c->remote_id = remote_id;
|
|
|
|
c->force_drain = 1;
|
|
|
|
}
|
|
|
|
if (c == NULL) {
|
|
|
|
packet_start(SSH_MSG_CHANNEL_OPEN_FAILURE);
|
|
|
|
packet_put_int(remote_id);
|
|
|
|
} else {
|
|
|
|
/* Send a confirmation to the remote host. */
|
|
|
|
debug("Forwarding authentication connection.");
|
|
|
|
packet_start(SSH_MSG_CHANNEL_OPEN_CONFIRMATION);
|
|
|
|
packet_put_int(remote_id);
|
|
|
|
packet_put_int(c->self);
|
|
|
|
}
|
|
|
|
packet_send();
|
|
|
|
}
|
2000-04-01 01:09:21 +00:00
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static Channel *
|
2000-11-13 11:57:25 +00:00
|
|
|
client_request_forwarded_tcpip(const char *request_type, int rchan)
|
|
|
|
{
|
2002-07-04 00:14:17 +00:00
|
|
|
Channel *c = NULL;
|
2000-11-13 11:57:25 +00:00
|
|
|
char *listen_address, *originator_address;
|
|
|
|
int listen_port, originator_port;
|
2001-05-05 04:09:47 +00:00
|
|
|
int sock;
|
2000-11-13 11:57:25 +00:00
|
|
|
|
|
|
|
/* Get rest of the packet */
|
|
|
|
listen_address = packet_get_string(NULL);
|
|
|
|
listen_port = packet_get_int();
|
|
|
|
originator_address = packet_get_string(NULL);
|
|
|
|
originator_port = packet_get_int();
|
2002-01-22 12:11:40 +00:00
|
|
|
packet_check_eom();
|
2000-11-13 11:57:25 +00:00
|
|
|
|
|
|
|
debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
|
|
|
|
listen_address, listen_port, originator_address, originator_port);
|
|
|
|
|
2001-07-04 05:15:15 +00:00
|
|
|
sock = channel_connect_by_listen_address(listen_port);
|
2001-05-05 04:09:47 +00:00
|
|
|
if (sock < 0) {
|
|
|
|
xfree(originator_address);
|
|
|
|
xfree(listen_address);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
c = channel_new("forwarded-tcpip",
|
|
|
|
SSH_CHANNEL_CONNECTING, sock, sock, -1,
|
|
|
|
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
|
2003-05-14 03:45:42 +00:00
|
|
|
originator_address, 1);
|
2000-11-13 11:57:25 +00:00
|
|
|
xfree(originator_address);
|
|
|
|
xfree(listen_address);
|
|
|
|
return c;
|
|
|
|
}
|
|
|
|
|
2002-07-04 00:14:17 +00:00
|
|
|
static Channel *
|
2000-11-13 11:57:25 +00:00
|
|
|
client_request_x11(const char *request_type, int rchan)
|
|
|
|
{
|
|
|
|
Channel *c = NULL;
|
|
|
|
char *originator;
|
|
|
|
int originator_port;
|
2001-05-05 04:09:47 +00:00
|
|
|
int sock;
|
2000-11-13 11:57:25 +00:00
|
|
|
|
|
|
|
if (!options.forward_x11) {
|
|
|
|
error("Warning: ssh server tried X11 forwarding.");
|
2005-12-31 05:19:53 +00:00
|
|
|
error("Warning: this is probably a break-in attempt by a malicious server.");
|
2000-11-13 11:57:25 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
originator = packet_get_string(NULL);
|
|
|
|
if (datafellows & SSH_BUG_X11FWD) {
|
|
|
|
debug2("buggy server: x11 request w/o originator_port");
|
|
|
|
originator_port = 0;
|
|
|
|
} else {
|
|
|
|
originator_port = packet_get_int();
|
|
|
|
}
|
2002-01-22 12:11:40 +00:00
|
|
|
packet_check_eom();
|
2000-11-13 11:57:25 +00:00
|
|
|
/* XXX check permission */
|
2001-01-29 22:19:34 +00:00
|
|
|
debug("client_request_x11: request from %s %d", originator,
|
|
|
|
originator_port);
|
2001-05-05 04:09:47 +00:00
|
|
|
xfree(originator);
|
2000-11-13 11:57:25 +00:00
|
|
|
sock = x11_connect_display();
|
2001-05-05 04:09:47 +00:00
|
|
|
if (sock < 0)
|
|
|
|
return NULL;
|
|
|
|
c = channel_new("x11",
|
|
|
|
SSH_CHANNEL_X11_OPEN, sock, sock, -1,
|
2003-05-14 03:45:42 +00:00
|
|
|
CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, "x11", 1);
|
2001-09-18 05:51:13 +00:00
|
|
|
c->force_drain = 1;
|
2000-11-13 11:57:25 +00:00
|
|
|
return c;
|
|
|
|
}
|
|
|
|
|
2002-07-04 00:14:17 +00:00
|
|
|
static Channel *
|
2000-11-13 11:57:25 +00:00
|
|
|
client_request_agent(const char *request_type, int rchan)
|
|
|
|
{
|
|
|
|
Channel *c = NULL;
|
2001-05-05 04:09:47 +00:00
|
|
|
int sock;
|
2000-11-13 11:57:25 +00:00
|
|
|
|
|
|
|
if (!options.forward_agent) {
|
|
|
|
error("Warning: ssh server tried agent forwarding.");
|
2005-12-31 05:19:53 +00:00
|
|
|
error("Warning: this is probably a break-in attempt by a malicious server.");
|
2000-11-13 11:57:25 +00:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
sock = ssh_get_authentication_socket();
|
2001-05-05 04:09:47 +00:00
|
|
|
if (sock < 0)
|
|
|
|
return NULL;
|
|
|
|
c = channel_new("authentication agent connection",
|
|
|
|
SSH_CHANNEL_OPEN, sock, sock, -1,
|
|
|
|
CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
|
2003-05-14 03:45:42 +00:00
|
|
|
"authentication agent connection", 1);
|
2001-09-18 05:51:13 +00:00
|
|
|
c->force_drain = 1;
|
2000-11-13 11:57:25 +00:00
|
|
|
return c;
|
|
|
|
}
|
|
|
|
|
2000-04-30 00:00:53 +00:00
|
|
|
/* XXXX move to generic input handler */
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2002-01-22 12:17:30 +00:00
|
|
|
client_input_channel_open(int type, u_int32_t seq, void *ctxt)
|
2000-04-30 00:00:53 +00:00
|
|
|
{
|
|
|
|
Channel *c = NULL;
|
|
|
|
char *ctype;
|
|
|
|
int rchan;
|
2002-06-25 23:17:36 +00:00
|
|
|
u_int rmaxpack, rwindow, len;
|
2000-04-30 00:00:53 +00:00
|
|
|
|
|
|
|
ctype = packet_get_string(&len);
|
|
|
|
rchan = packet_get_int();
|
|
|
|
rwindow = packet_get_int();
|
|
|
|
rmaxpack = packet_get_int();
|
|
|
|
|
- Remove references to SSLeay.
- Big OpenBSD CVS update
- markus@cvs.openbsd.org
[clientloop.c]
- typo
[session.c]
- update proctitle on pty alloc/dealloc, e.g. w/ windows client
[session.c]
- update proctitle for proto 1, too
[channels.h nchan.c serverloop.c session.c sshd.c]
- use c-style comments
- deraadt@cvs.openbsd.org
[scp.c]
- more atomicio
- markus@cvs.openbsd.org
[channels.c]
- set O_NONBLOCK
[ssh.1]
- update AUTHOR
[readconf.c ssh-keygen.c ssh.h]
- default DSA key file ~/.ssh/id_dsa
[clientloop.c]
- typo, rm verbose debug
- deraadt@cvs.openbsd.org
[ssh-keygen.1]
- document DSA use of ssh-keygen
[sshd.8]
- a start at describing what i understand of the DSA side
[ssh-keygen.1]
- document -X and -x
[ssh-keygen.c]
- simplify usage
- markus@cvs.openbsd.org
[sshd.8]
- there is no rhosts_dsa
[ssh-keygen.1]
- document -y, update -X,-x
[nchan.c]
- fix close for non-open ssh1 channels
[servconf.c servconf.h ssh.h sshd.8 sshd.c ]
- s/DsaKey/HostDSAKey/, document option
[sshconnect2.c]
- respect number_of_password_prompts
[channels.c channels.h servconf.c servconf.h session.c sshd.8]
- GatewayPorts for sshd, ok deraadt@
[ssh-add.1 ssh-agent.1 ssh.1]
- more doc on: DSA, id_dsa, known_hosts2, authorized_keys2
[ssh.1]
- more info on proto 2
[sshd.8]
- sync AUTHOR w/ ssh.1
[key.c key.h sshconnect.c]
- print key type when talking about host keys
[packet.c]
- clear padding in ssh2
[dsa.c key.c radix.c ssh.h sshconnect1.c uuencode.c uuencode.h]
- replace broken uuencode w/ libc b64_ntop
[auth2.c]
- log failure before sending the reply
[key.c radix.c uuencode.c]
- remote trailing comments before calling __b64_pton
[auth2.c readconf.c readconf.h servconf.c servconf.h ssh.1]
[sshconnect2.c sshd.8]
- add DSAAuthetication option to ssh/sshd, document SSH2 in sshd.8
- Bring in b64_ntop and b64_pton from OpenBSD libc (bsd-base64.[ch])
2000-05-07 02:03:14 +00:00
|
|
|
debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
|
2000-04-30 00:00:53 +00:00
|
|
|
ctype, rchan, rwindow, rmaxpack);
|
|
|
|
|
2000-11-13 11:57:25 +00:00
|
|
|
if (strcmp(ctype, "forwarded-tcpip") == 0) {
|
|
|
|
c = client_request_forwarded_tcpip(ctype, rchan);
|
|
|
|
} else if (strcmp(ctype, "x11") == 0) {
|
|
|
|
c = client_request_x11(ctype, rchan);
|
|
|
|
} else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
|
|
|
|
c = client_request_agent(ctype, rchan);
|
2000-04-30 00:00:53 +00:00
|
|
|
}
|
|
|
|
/* XXX duplicate : */
|
|
|
|
if (c != NULL) {
|
|
|
|
debug("confirm %s", ctype);
|
|
|
|
c->remote_id = rchan;
|
|
|
|
c->remote_window = rwindow;
|
|
|
|
c->remote_maxpacket = rmaxpack;
|
2001-05-09 00:01:18 +00:00
|
|
|
if (c->type != SSH_CHANNEL_CONNECTING) {
|
|
|
|
packet_start(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION);
|
|
|
|
packet_put_int(c->remote_id);
|
|
|
|
packet_put_int(c->self);
|
|
|
|
packet_put_int(c->local_window);
|
|
|
|
packet_put_int(c->local_maxpacket);
|
|
|
|
packet_send();
|
|
|
|
}
|
2000-04-30 00:00:53 +00:00
|
|
|
} else {
|
|
|
|
debug("failure %s", ctype);
|
|
|
|
packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
|
|
|
|
packet_put_int(rchan);
|
|
|
|
packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
|
2001-04-29 19:52:00 +00:00
|
|
|
if (!(datafellows & SSH_BUG_OPENFAILURE)) {
|
2001-05-09 00:01:18 +00:00
|
|
|
packet_put_cstring("open failed");
|
2001-04-29 19:52:00 +00:00
|
|
|
packet_put_cstring("");
|
|
|
|
}
|
2000-04-30 00:00:53 +00:00
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
xfree(ctype);
|
|
|
|
}
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2002-01-22 12:17:30 +00:00
|
|
|
client_input_channel_req(int type, u_int32_t seq, void *ctxt)
|
2001-02-09 01:34:36 +00:00
|
|
|
{
|
|
|
|
Channel *c = NULL;
|
2004-06-15 00:34:08 +00:00
|
|
|
int exitval, id, reply, success = 0;
|
2001-02-09 01:34:36 +00:00
|
|
|
char *rtype;
|
|
|
|
|
|
|
|
id = packet_get_int();
|
|
|
|
rtype = packet_get_string(NULL);
|
|
|
|
reply = packet_get_char();
|
|
|
|
|
|
|
|
debug("client_input_channel_req: channel %d rtype %s reply %d",
|
|
|
|
id, rtype, reply);
|
|
|
|
|
2004-06-18 12:23:22 +00:00
|
|
|
if (id == -1) {
|
|
|
|
error("client_input_channel_req: request for channel -1");
|
|
|
|
} else if ((c = channel_lookup(id)) == NULL) {
|
2001-02-09 01:34:36 +00:00
|
|
|
error("client_input_channel_req: channel %d: unknown channel", id);
|
|
|
|
} else if (strcmp(rtype, "exit-status") == 0) {
|
2004-06-15 00:34:08 +00:00
|
|
|
exitval = packet_get_int();
|
|
|
|
if (id == session_ident) {
|
|
|
|
success = 1;
|
|
|
|
exit_status = exitval;
|
|
|
|
} else if (c->ctl_fd == -1) {
|
|
|
|
error("client_input_channel_req: unexpected channel %d",
|
|
|
|
session_ident);
|
|
|
|
} else {
|
|
|
|
atomicio(vwrite, c->ctl_fd, &exitval, sizeof(exitval));
|
|
|
|
success = 1;
|
|
|
|
}
|
2002-01-22 12:11:40 +00:00
|
|
|
packet_check_eom();
|
2001-02-09 01:34:36 +00:00
|
|
|
}
|
|
|
|
if (reply) {
|
|
|
|
packet_start(success ?
|
|
|
|
SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
|
2004-06-18 12:23:22 +00:00
|
|
|
packet_put_int(id);
|
2001-02-09 01:34:36 +00:00
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
xfree(rtype);
|
|
|
|
}
|
2002-01-22 12:21:58 +00:00
|
|
|
static void
|
|
|
|
client_input_global_request(int type, u_int32_t seq, void *ctxt)
|
|
|
|
{
|
|
|
|
char *rtype;
|
|
|
|
int want_reply;
|
|
|
|
int success = 0;
|
|
|
|
|
|
|
|
rtype = packet_get_string(NULL);
|
|
|
|
want_reply = packet_get_char();
|
2003-12-17 05:33:10 +00:00
|
|
|
debug("client_input_global_request: rtype %s want_reply %d",
|
|
|
|
rtype, want_reply);
|
2002-01-22 12:21:58 +00:00
|
|
|
if (want_reply) {
|
|
|
|
packet_start(success ?
|
|
|
|
SSH2_MSG_REQUEST_SUCCESS : SSH2_MSG_REQUEST_FAILURE);
|
|
|
|
packet_send();
|
|
|
|
packet_write_wait();
|
|
|
|
}
|
|
|
|
xfree(rtype);
|
|
|
|
}
|
2000-04-30 00:00:53 +00:00
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
void
|
2004-07-17 06:12:08 +00:00
|
|
|
client_session2_setup(int id, int want_tty, int want_subsystem,
|
2004-06-17 15:17:29 +00:00
|
|
|
const char *term, struct termios *tiop, int in_fd, Buffer *cmd, char **env,
|
2004-06-15 00:34:08 +00:00
|
|
|
dispatch_fn *subsys_repl)
|
|
|
|
{
|
|
|
|
int len;
|
2004-11-05 09:35:44 +00:00
|
|
|
Channel *c = NULL;
|
2004-06-15 00:34:08 +00:00
|
|
|
|
|
|
|
debug2("%s: id %d", __func__, id);
|
|
|
|
|
2004-11-05 09:35:44 +00:00
|
|
|
if ((c = channel_lookup(id)) == NULL)
|
|
|
|
fatal("client_session2_setup: channel %d: unknown channel", id);
|
|
|
|
|
2004-06-15 00:34:08 +00:00
|
|
|
if (want_tty) {
|
|
|
|
struct winsize ws;
|
|
|
|
struct termios tio;
|
|
|
|
|
|
|
|
/* Store window size in the packet. */
|
|
|
|
if (ioctl(in_fd, TIOCGWINSZ, &ws) < 0)
|
|
|
|
memset(&ws, 0, sizeof(ws));
|
|
|
|
|
|
|
|
channel_request_start(id, "pty-req", 0);
|
|
|
|
packet_put_cstring(term != NULL ? term : "");
|
2006-03-26 03:04:36 +00:00
|
|
|
packet_put_int((u_int)ws.ws_col);
|
|
|
|
packet_put_int((u_int)ws.ws_row);
|
|
|
|
packet_put_int((u_int)ws.ws_xpixel);
|
|
|
|
packet_put_int((u_int)ws.ws_ypixel);
|
2004-06-15 00:34:08 +00:00
|
|
|
tio = get_saved_tio();
|
|
|
|
tty_make_modes(-1, tiop != NULL ? tiop : &tio);
|
|
|
|
packet_send();
|
|
|
|
/* XXX wait for reply */
|
2004-11-05 09:35:44 +00:00
|
|
|
c->client_tty = 1;
|
2004-06-15 00:34:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Transfer any environment variables from client to server */
|
2004-06-17 15:17:29 +00:00
|
|
|
if (options.num_send_env != 0 && env != NULL) {
|
2004-06-15 00:34:08 +00:00
|
|
|
int i, j, matched;
|
|
|
|
char *name, *val;
|
|
|
|
|
|
|
|
debug("Sending environment.");
|
2004-06-17 15:17:29 +00:00
|
|
|
for (i = 0; env[i] != NULL; i++) {
|
2004-06-15 00:34:08 +00:00
|
|
|
/* Split */
|
2004-06-17 15:17:29 +00:00
|
|
|
name = xstrdup(env[i]);
|
2004-06-15 00:34:08 +00:00
|
|
|
if ((val = strchr(name, '=')) == NULL) {
|
2005-11-05 04:07:59 +00:00
|
|
|
xfree(name);
|
2004-06-15 00:34:08 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
*val++ = '\0';
|
|
|
|
|
|
|
|
matched = 0;
|
|
|
|
for (j = 0; j < options.num_send_env; j++) {
|
|
|
|
if (match_pattern(name, options.send_env[j])) {
|
|
|
|
matched = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (!matched) {
|
|
|
|
debug3("Ignored env %s", name);
|
2005-11-05 04:07:59 +00:00
|
|
|
xfree(name);
|
2004-06-15 00:34:08 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
debug("Sending env %s = %s", name, val);
|
|
|
|
channel_request_start(id, "env", 0);
|
|
|
|
packet_put_cstring(name);
|
|
|
|
packet_put_cstring(val);
|
|
|
|
packet_send();
|
2005-11-05 04:07:59 +00:00
|
|
|
xfree(name);
|
2004-06-15 00:34:08 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
len = buffer_len(cmd);
|
|
|
|
if (len > 0) {
|
|
|
|
if (len > 900)
|
|
|
|
len = 900;
|
|
|
|
if (want_subsystem) {
|
|
|
|
debug("Sending subsystem: %.*s", len, (u_char*)buffer_ptr(cmd));
|
|
|
|
channel_request_start(id, "subsystem", subsys_repl != NULL);
|
|
|
|
if (subsys_repl != NULL) {
|
|
|
|
/* register callback for reply */
|
|
|
|
/* XXX we assume that client_loop has already been called */
|
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_FAILURE, subsys_repl);
|
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_SUCCESS, subsys_repl);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
debug("Sending command: %.*s", len, (u_char*)buffer_ptr(cmd));
|
|
|
|
channel_request_start(id, "exec", 0);
|
|
|
|
}
|
|
|
|
packet_put_string(buffer_ptr(cmd), buffer_len(cmd));
|
|
|
|
packet_send();
|
|
|
|
} else {
|
|
|
|
channel_request_start(id, "shell", 0);
|
|
|
|
packet_send();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_init_dispatch_20(void)
|
2000-04-06 02:32:37 +00:00
|
|
|
{
|
2001-04-04 17:57:54 +00:00
|
|
|
dispatch_init(&dispatch_protocol_error);
|
2002-04-23 11:09:44 +00:00
|
|
|
|
2000-04-06 02:32:37 +00:00
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose);
|
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_DATA, &channel_input_data);
|
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_EOF, &channel_input_ieof);
|
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_EXTENDED_DATA, &channel_input_extended_data);
|
2000-04-30 00:00:53 +00:00
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open);
|
2000-04-06 02:32:37 +00:00
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
|
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
|
2001-02-09 01:34:36 +00:00
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
|
2000-04-06 02:32:37 +00:00
|
|
|
dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
|
2002-01-22 12:21:58 +00:00
|
|
|
dispatch_set(SSH2_MSG_GLOBAL_REQUEST, &client_input_global_request);
|
2001-04-04 17:57:54 +00:00
|
|
|
|
|
|
|
/* rekeying */
|
|
|
|
dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
|
2002-04-23 11:09:44 +00:00
|
|
|
|
|
|
|
/* global request reply messages */
|
|
|
|
dispatch_set(SSH2_MSG_REQUEST_FAILURE, &client_global_request_reply);
|
|
|
|
dispatch_set(SSH2_MSG_REQUEST_SUCCESS, &client_global_request_reply);
|
2000-04-06 02:32:37 +00:00
|
|
|
}
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_init_dispatch_13(void)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
|
|
|
dispatch_init(NULL);
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close);
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, &channel_input_close_confirmation);
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_DATA, &channel_input_data);
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation);
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure);
|
|
|
|
dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open);
|
|
|
|
dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status);
|
|
|
|
dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data);
|
|
|
|
dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data);
|
2000-10-28 03:19:58 +00:00
|
|
|
|
|
|
|
dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ?
|
2003-10-02 06:17:00 +00:00
|
|
|
&client_input_agent_open : &deny_input_open);
|
2000-10-28 03:19:58 +00:00
|
|
|
dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ?
|
|
|
|
&x11_input_open : &deny_input_open);
|
2000-04-01 01:09:21 +00:00
|
|
|
}
|
2001-06-25 05:01:22 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_init_dispatch_15(void)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
|
|
|
client_init_dispatch_13();
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
|
|
|
|
dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
|
|
|
|
}
|
2001-07-04 05:10:27 +00:00
|
|
|
static void
|
2001-02-09 02:11:24 +00:00
|
|
|
client_init_dispatch(void)
|
2000-04-01 01:09:21 +00:00
|
|
|
{
|
2000-04-06 02:32:37 +00:00
|
|
|
if (compat20)
|
|
|
|
client_init_dispatch_20();
|
|
|
|
else if (compat13)
|
2000-04-01 01:09:21 +00:00
|
|
|
client_init_dispatch_13();
|
|
|
|
else
|
|
|
|
client_init_dispatch_15();
|
|
|
|
}
|
2003-09-22 11:16:05 +00:00
|
|
|
|
|
|
|
/* client specific fatal cleanup */
|
|
|
|
void
|
2003-10-02 06:12:36 +00:00
|
|
|
cleanup_exit(int i)
|
2003-09-22 11:16:05 +00:00
|
|
|
{
|
|
|
|
leave_raw_mode();
|
|
|
|
leave_non_blocking();
|
2004-06-15 00:34:08 +00:00
|
|
|
if (options.control_path != NULL && control_fd != -1)
|
|
|
|
unlink(options.control_path);
|
2003-10-02 06:12:36 +00:00
|
|
|
_exit(i);
|
2003-09-22 11:16:05 +00:00
|
|
|
}
|