version 1.26.2.4, 2001/03/21 18:52:41 |
version 1.27, 2000/06/20 01:39:40 |
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/* |
/* |
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* |
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* clientloop.c |
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* |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
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* |
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* All rights reserved |
* All rights reserved |
* The main loop for the interactive session (client side). |
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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". |
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* |
* |
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* Created: Sat Sep 23 12:23:57 1995 ylo |
* |
* |
* Copyright (c) 1999 Theo de Raadt. All rights reserved. |
* The main loop for the interactive session (client side). |
* |
* |
* 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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* |
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* |
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* SSH2 support added by Markus Friedl. |
* SSH2 support added by Markus Friedl. |
* Copyright (c) 1999,2000 Markus Friedl. 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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*/ |
*/ |
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#include "includes.h" |
#include "includes.h" |
RCSID("$OpenBSD$"); |
RCSID("$OpenBSD$"); |
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#include "ssh.h" |
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#include "ssh1.h" |
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#include "ssh2.h" |
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#include "xmalloc.h" |
#include "xmalloc.h" |
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#include "ssh.h" |
#include "packet.h" |
#include "packet.h" |
#include "buffer.h" |
#include "buffer.h" |
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#include "authfd.h" |
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#include "readconf.h" |
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#include "ssh2.h" |
#include "compat.h" |
#include "compat.h" |
#include "channels.h" |
#include "channels.h" |
#include "dispatch.h" |
#include "dispatch.h" |
#include "buffer.h" |
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#include "bufaux.h" |
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#include "key.h" |
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#include "log.h" |
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#include "readconf.h" |
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#include "clientloop.h" |
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#include "authfd.h" |
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#include "atomicio.h" |
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/* import options */ |
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extern Options options; |
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/* Flag indicating that stdin should be redirected from /dev/null. */ |
/* Flag indicating that stdin should be redirected from /dev/null. */ |
extern int stdin_null_flag; |
extern int stdin_null_flag; |
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static int in_non_blocking_mode = 0; |
static int in_non_blocking_mode = 0; |
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/* Common data for the client loop code. */ |
/* Common data for the client loop code. */ |
static int quit_pending; /* Set to non-zero to quit the client loop. */ |
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static int escape_char; /* Escape character. */ |
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static int escape_pending; /* Last character was the escape character */ |
static int escape_pending; /* Last character was the escape character */ |
static int last_was_cr; /* Last character was a newline. */ |
static int last_was_cr; /* Last character was a newline. */ |
static int exit_status; /* Used to store the exit status of the command. */ |
static int exit_status; /* Used to store the exit status of the command. */ |
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static Buffer stdin_buffer; /* Buffer for stdin data. */ |
static Buffer stdin_buffer; /* Buffer for stdin data. */ |
static Buffer stdout_buffer; /* Buffer for stdout data. */ |
static Buffer stdout_buffer; /* Buffer for stdout data. */ |
static Buffer stderr_buffer; /* Buffer for stderr data. */ |
static Buffer stderr_buffer; /* Buffer for stderr data. */ |
static u_long stdin_bytes, stdout_bytes, stderr_bytes; |
static unsigned int buffer_high;/* Soft max buffer size. */ |
static u_int buffer_high;/* Soft max buffer size. */ |
static int max_fd; /* Maximum file descriptor number in select(). */ |
static int connection_in; /* Connection to server (input). */ |
static int connection_in; /* Connection to server (input). */ |
static int connection_out; /* Connection to server (output). */ |
static int connection_out; /* Connection to server (output). */ |
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static unsigned long stdin_bytes, stdout_bytes, stderr_bytes; |
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static int quit_pending; /* Set to non-zero to quit the client loop. */ |
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static int escape_char; /* Escape character. */ |
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void client_init_dispatch(void); |
void client_init_dispatch(void); |
int session_ident = -1; |
int session_ident = -1; |
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/* Returns the user\'s terminal to normal mode if it had been put in raw mode. */ |
/* Returns the user\'s terminal to normal mode if it had been put in raw mode. */ |
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void |
void |
leave_raw_mode(void) |
leave_raw_mode() |
{ |
{ |
if (!in_raw_mode) |
if (!in_raw_mode) |
return; |
return; |
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/* Puts the user\'s terminal in raw mode. */ |
/* Puts the user\'s terminal in raw mode. */ |
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void |
void |
enter_raw_mode(void) |
enter_raw_mode() |
{ |
{ |
struct termios tio; |
struct termios tio; |
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/* Restores stdin to blocking mode. */ |
/* Restores stdin to blocking mode. */ |
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void |
void |
leave_non_blocking(void) |
leave_non_blocking() |
{ |
{ |
if (in_non_blocking_mode) { |
if (in_non_blocking_mode) { |
(void) fcntl(fileno(stdin), F_SETFL, 0); |
(void) fcntl(fileno(stdin), F_SETFL, 0); |
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/* Puts stdin terminal in non-blocking mode. */ |
/* Puts stdin terminal in non-blocking mode. */ |
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void |
void |
enter_non_blocking(void) |
enter_non_blocking() |
{ |
{ |
in_non_blocking_mode = 1; |
in_non_blocking_mode = 1; |
(void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK); |
(void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK); |
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*/ |
*/ |
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double |
double |
get_current_time(void) |
get_current_time() |
{ |
{ |
struct timeval tv; |
struct timeval tv; |
gettimeofday(&tv, NULL); |
gettimeofday(&tv, NULL); |
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*/ |
*/ |
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void |
void |
client_check_initial_eof_on_stdin(void) |
client_check_initial_eof_on_stdin() |
{ |
{ |
int len; |
int len; |
char buf[1]; |
char buf[1]; |
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* and also process it as an escape character if |
* and also process it as an escape character if |
* appropriate. |
* appropriate. |
*/ |
*/ |
if ((u_char) buf[0] == escape_char) |
if ((unsigned char) buf[0] == escape_char) |
escape_pending = 1; |
escape_pending = 1; |
else |
else { |
buffer_append(&stdin_buffer, buf, 1); |
buffer_append(&stdin_buffer, buf, 1); |
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stdin_bytes += 1; |
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} |
} |
} |
leave_non_blocking(); |
leave_non_blocking(); |
} |
} |
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*/ |
*/ |
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void |
void |
client_make_packets_from_stdin_data(void) |
client_make_packets_from_stdin_data() |
{ |
{ |
u_int len; |
unsigned int len; |
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/* Send buffered stdin data to the server. */ |
/* Send buffered stdin data to the server. */ |
while (buffer_len(&stdin_buffer) > 0 && |
while (buffer_len(&stdin_buffer) > 0 && |
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packet_put_string(buffer_ptr(&stdin_buffer), len); |
packet_put_string(buffer_ptr(&stdin_buffer), len); |
packet_send(); |
packet_send(); |
buffer_consume(&stdin_buffer, len); |
buffer_consume(&stdin_buffer, len); |
stdin_bytes += len; |
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/* If we have a pending EOF, send it now. */ |
/* If we have a pending EOF, send it now. */ |
if (stdin_eof && buffer_len(&stdin_buffer) == 0) { |
if (stdin_eof && buffer_len(&stdin_buffer) == 0) { |
packet_start(SSH_CMSG_EOF); |
packet_start(SSH_CMSG_EOF); |
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*/ |
*/ |
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void |
void |
client_check_window_change(void) |
client_check_window_change() |
{ |
{ |
struct winsize ws; |
struct winsize ws; |
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if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0) |
return; |
return; |
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debug2("client_check_window_change: changed"); |
debug("client_check_window_change: changed"); |
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if (compat20) { |
if (compat20) { |
channel_request_start(session_ident, "window-change", 0); |
channel_request_start(session_ident, "window-change", 0); |
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*/ |
*/ |
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void |
void |
client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp, |
client_wait_until_can_do_something(fd_set * readset, fd_set * writeset) |
int *maxfdp) |
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{ |
{ |
/* Add any selections by the channel mechanism. */ |
/*debug("client_wait_until_can_do_something"); */ |
channel_prepare_select(readsetp, writesetp, maxfdp); |
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/* Initialize select masks. */ |
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FD_ZERO(readset); |
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FD_ZERO(writeset); |
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if (!compat20) { |
if (!compat20) { |
/* Read from the connection, unless our buffers are full. */ |
/* Read from the connection, unless our buffers are full. */ |
if (buffer_len(&stdout_buffer) < buffer_high && |
if (buffer_len(&stdout_buffer) < buffer_high && |
buffer_len(&stderr_buffer) < buffer_high && |
buffer_len(&stderr_buffer) < buffer_high && |
channel_not_very_much_buffered_data()) |
channel_not_very_much_buffered_data()) |
FD_SET(connection_in, *readsetp); |
FD_SET(connection_in, readset); |
/* |
/* |
* Read from stdin, unless we have seen EOF or have very much |
* Read from stdin, unless we have seen EOF or have very much |
* buffered data to send to the server. |
* buffered data to send to the server. |
*/ |
*/ |
if (!stdin_eof && packet_not_very_much_data_to_write()) |
if (!stdin_eof && packet_not_very_much_data_to_write()) |
FD_SET(fileno(stdin), *readsetp); |
FD_SET(fileno(stdin), readset); |
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/* Select stdout/stderr if have data in buffer. */ |
/* Select stdout/stderr if have data in buffer. */ |
if (buffer_len(&stdout_buffer) > 0) |
if (buffer_len(&stdout_buffer) > 0) |
FD_SET(fileno(stdout), *writesetp); |
FD_SET(fileno(stdout), writeset); |
if (buffer_len(&stderr_buffer) > 0) |
if (buffer_len(&stderr_buffer) > 0) |
FD_SET(fileno(stderr), *writesetp); |
FD_SET(fileno(stderr), writeset); |
} else { |
} else { |
FD_SET(connection_in, *readsetp); |
FD_SET(connection_in, readset); |
} |
} |
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/* Add any selections by the channel mechanism. */ |
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channel_prepare_select(readset, writeset); |
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/* Select server connection if have data to write to the server. */ |
/* Select server connection if have data to write to the server. */ |
if (packet_have_data_to_write()) |
if (packet_have_data_to_write()) |
FD_SET(connection_out, *writesetp); |
FD_SET(connection_out, writeset); |
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/* move UP XXX */ |
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/* Update maximum file descriptor number, if appropriate. */ |
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if (channel_max_fd() > max_fd) |
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max_fd = channel_max_fd(); |
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/* |
/* |
* Wait for something to happen. This will suspend the process until |
* Wait for something to happen. This will suspend the process until |
* some selected descriptor can be read, written, or has some other |
* some selected descriptor can be read, written, or has some other |
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* SSH_MSG_IGNORE packet when the timeout expires. |
* SSH_MSG_IGNORE packet when the timeout expires. |
*/ |
*/ |
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if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) { |
if (select(max_fd + 1, readset, writeset, NULL, NULL) < 0) { |
char buf[100]; |
char buf[100]; |
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/* Some systems fail to clear these automatically. */ |
/* |
FD_ZERO(readset); |
* We have to clear the select masks, because we return. |
FD_ZERO(writeset); |
* We have to return, because the mainloop checks for the flags |
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* set by the signal handlers. |
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*/ |
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memset(*readsetp, 0, *maxfdp); |
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memset(*writesetp, 0, *maxfdp); |
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if (errno == EINTR) |
if (errno == EINTR) |
return; |
return; |
/* Note: we might still have data in the buffers. */ |
/* Note: we might still have data in the buffers. */ |
snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); |
snprintf(buf, sizeof buf, "select: %s\r\n", strerror(errno)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
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stderr_bytes += strlen(buf); |
quit_pending = 1; |
quit_pending = 1; |
} |
} |
} |
} |
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void |
void |
client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr) |
client_suspend_self() |
{ |
{ |
struct winsize oldws, newws; |
struct winsize oldws, newws; |
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/* Flush stdout and stderr buffers. */ |
/* Flush stdout and stderr buffers. */ |
if (buffer_len(bout) > 0) |
if (buffer_len(&stdout_buffer) > 0) |
atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout)); |
atomicio(write, fileno(stdout), buffer_ptr(&stdout_buffer), |
if (buffer_len(berr) > 0) |
buffer_len(&stdout_buffer)); |
atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr)); |
if (buffer_len(&stderr_buffer) > 0) |
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atomicio(write, fileno(stderr), buffer_ptr(&stderr_buffer), |
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buffer_len(&stderr_buffer)); |
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leave_raw_mode(); |
leave_raw_mode(); |
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* Free (and clear) the buffer to reduce the amount of data that gets |
* Free (and clear) the buffer to reduce the amount of data that gets |
* written to swap. |
* written to swap. |
*/ |
*/ |
buffer_free(bin); |
buffer_free(&stdin_buffer); |
buffer_free(bout); |
buffer_free(&stdout_buffer); |
buffer_free(berr); |
buffer_free(&stderr_buffer); |
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/* Save old window size. */ |
/* Save old window size. */ |
ioctl(fileno(stdin), TIOCGWINSZ, &oldws); |
ioctl(fileno(stdin), TIOCGWINSZ, &oldws); |
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received_window_change_signal = 1; |
received_window_change_signal = 1; |
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/* OK, we have been continued by the user. Reinitialize buffers. */ |
/* OK, we have been continued by the user. Reinitialize buffers. */ |
buffer_init(bin); |
buffer_init(&stdin_buffer); |
buffer_init(bout); |
buffer_init(&stdout_buffer); |
buffer_init(berr); |
buffer_init(&stderr_buffer); |
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enter_raw_mode(); |
enter_raw_mode(); |
} |
} |
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if (FD_ISSET(connection_in, readset)) { |
if (FD_ISSET(connection_in, readset)) { |
/* Read as much as possible. */ |
/* Read as much as possible. */ |
len = read(connection_in, buf, sizeof(buf)); |
len = read(connection_in, buf, sizeof(buf)); |
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/*debug("read connection_in len %d", len); XXX */ |
if (len == 0) { |
if (len == 0) { |
/* Received EOF. The remote host has closed the connection. */ |
/* Received EOF. The remote host has closed the connection. */ |
snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n", |
snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n", |
host); |
host); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
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stderr_bytes += strlen(buf); |
quit_pending = 1; |
quit_pending = 1; |
return; |
return; |
} |
} |
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* There is a kernel bug on Solaris that causes select to |
* There is a kernel bug on Solaris that causes select to |
* sometimes wake up even though there is no data available. |
* sometimes wake up even though there is no data available. |
*/ |
*/ |
if (len < 0 && (errno == EAGAIN || errno == EINTR)) |
if (len < 0 && errno == EAGAIN) |
len = 0; |
len = 0; |
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if (len < 0) { |
if (len < 0) { |
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snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n", |
snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n", |
host, strerror(errno)); |
host, strerror(errno)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
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stderr_bytes += strlen(buf); |
quit_pending = 1; |
quit_pending = 1; |
return; |
return; |
} |
} |
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} |
} |
} |
} |
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/* process the characters one by one */ |
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int |
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process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len) |
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{ |
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char string[1024]; |
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pid_t pid; |
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int bytes = 0; |
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u_int i; |
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u_char ch; |
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char *s; |
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for (i = 0; i < len; i++) { |
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/* Get one character at a time. */ |
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ch = buf[i]; |
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if (escape_pending) { |
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/* We have previously seen an escape character. */ |
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/* Clear the flag now. */ |
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escape_pending = 0; |
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/* Process the escaped character. */ |
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switch (ch) { |
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case '.': |
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/* Terminate the connection. */ |
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snprintf(string, sizeof string, "%c.\r\n", escape_char); |
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buffer_append(berr, string, strlen(string)); |
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quit_pending = 1; |
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return -1; |
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case 'Z' - 64: |
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/* Suspend the program. */ |
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/* Print a message to that effect to the user. */ |
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snprintf(string, sizeof string, "%c^Z [suspend ssh]\r\n", escape_char); |
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buffer_append(berr, string, strlen(string)); |
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/* Restore terminal modes and suspend. */ |
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client_suspend_self(bin, bout, berr); |
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/* We have been continued. */ |
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continue; |
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case '&': |
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/* XXX does not work yet with proto 2 */ |
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if (compat20) |
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continue; |
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/* |
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* Detach the program (continue to serve connections, |
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* but put in background and no more new connections). |
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*/ |
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if (!stdin_eof) { |
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/* |
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* Sending SSH_CMSG_EOF alone does not always appear |
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* to be enough. So we try to send an EOF character |
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* first. |
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*/ |
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packet_start(SSH_CMSG_STDIN_DATA); |
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packet_put_string("\004", 1); |
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packet_send(); |
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/* Close stdin. */ |
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stdin_eof = 1; |
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if (buffer_len(bin) == 0) { |
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packet_start(SSH_CMSG_EOF); |
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packet_send(); |
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} |
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} |
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/* Restore tty modes. */ |
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leave_raw_mode(); |
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/* Stop listening for new connections. */ |
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channel_stop_listening(); |
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printf("%c& [backgrounded]\n", escape_char); |
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/* Fork into background. */ |
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pid = fork(); |
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if (pid < 0) { |
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error("fork: %.100s", strerror(errno)); |
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continue; |
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} |
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if (pid != 0) { /* This is the parent. */ |
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/* The parent just exits. */ |
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exit(0); |
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} |
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/* The child continues serving connections. */ |
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continue; /*XXX ? */ |
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case '?': |
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snprintf(string, sizeof string, |
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"%c?\r\n\ |
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Supported escape sequences:\r\n\ |
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~. - terminate connection\r\n\ |
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~^Z - suspend ssh\r\n\ |
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~# - list forwarded connections\r\n\ |
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~& - background ssh (when waiting for connections to terminate)\r\n\ |
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~? - this message\r\n\ |
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~~ - send the escape character by typing it twice\r\n\ |
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(Note that escapes are only recognized immediately after newline.)\r\n", |
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escape_char); |
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buffer_append(berr, string, strlen(string)); |
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continue; |
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case '#': |
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snprintf(string, sizeof string, "%c#\r\n", escape_char); |
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buffer_append(berr, string, strlen(string)); |
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s = channel_open_message(); |
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buffer_append(berr, s, strlen(s)); |
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xfree(s); |
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continue; |
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|
|
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; |
|
} |
|
|
|
void |
void |
client_process_input(fd_set * readset) |
client_process_input(fd_set * readset) |
{ |
{ |
int len; |
int len; |
char buf[8192]; |
pid_t pid; |
|
char buf[8192], *s; |
|
|
/* Read input from stdin. */ |
/* Read input from stdin. */ |
if (FD_ISSET(fileno(stdin), readset)) { |
if (FD_ISSET(fileno(stdin), readset)) { |
|
|
if (len < 0) { |
if (len < 0) { |
snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno)); |
snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
stderr_bytes += strlen(buf); |
} |
} |
/* Mark that we have seen EOF. */ |
/* Mark that we have seen EOF. */ |
stdin_eof = 1; |
stdin_eof = 1; |
|
|
* Just append the data to buffer. |
* Just append the data to buffer. |
*/ |
*/ |
buffer_append(&stdin_buffer, buf, len); |
buffer_append(&stdin_buffer, buf, len); |
|
stdin_bytes += len; |
} else { |
} else { |
/* |
/* |
* Normal, successful read. But we have an escape character |
* Normal, successful read. But we have an escape character |
* and have to process the characters one by one. |
* and have to process the characters one by one. |
*/ |
*/ |
if (process_escapes(&stdin_buffer, &stdout_buffer, |
unsigned int i; |
&stderr_buffer, buf, len) == -1) |
for (i = 0; i < len; i++) { |
return; |
unsigned char ch; |
|
/* 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(buf, sizeof buf, "%c.\r\n", escape_char); |
|
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
stderr_bytes += strlen(buf); |
|
quit_pending = 1; |
|
return; |
|
|
|
case 'Z' - 64: |
|
/* Suspend the program. */ |
|
/* Print a message to that effect to the user. */ |
|
snprintf(buf, sizeof buf, "%c^Z\r\n", escape_char); |
|
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
stderr_bytes += strlen(buf); |
|
|
|
/* Restore terminal modes and suspend. */ |
|
client_suspend_self(); |
|
|
|
/* We have been continued. */ |
|
continue; |
|
|
|
case '&': |
|
/* |
|
* Detach the program (continue to serve connections, |
|
* but put in background and no more new connections). |
|
*/ |
|
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(&stdin_buffer) == 0) { |
|
packet_start(SSH_CMSG_EOF); |
|
packet_send(); |
|
} |
|
} |
|
/* Restore tty modes. */ |
|
leave_raw_mode(); |
|
|
|
/* Stop listening for new connections. */ |
|
channel_stop_listening(); |
|
|
|
printf("%c& [backgrounded]\n", escape_char); |
|
|
|
/* 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. */ |
|
continue; |
|
|
|
case '?': |
|
snprintf(buf, sizeof buf, |
|
"%c?\r\n\ |
|
Supported escape sequences:\r\n\ |
|
~. - terminate connection\r\n\ |
|
~^Z - suspend ssh\r\n\ |
|
~# - list forwarded connections\r\n\ |
|
~& - background ssh (when waiting for connections to terminate)\r\n\ |
|
~? - this message\r\n\ |
|
~~ - send the escape character by typing it twice\r\n\ |
|
(Note that escapes are only recognized immediately after newline.)\r\n", |
|
escape_char); |
|
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
continue; |
|
|
|
case '#': |
|
snprintf(buf, sizeof buf, "%c#\r\n", escape_char); |
|
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
s = channel_open_message(); |
|
buffer_append(&stderr_buffer, s, strlen(s)); |
|
xfree(s); |
|
continue; |
|
|
|
default: |
|
if (ch != escape_char) { |
|
/* |
|
* Escape character followed by non-special character. |
|
* Append both to the input buffer. |
|
*/ |
|
buf[0] = escape_char; |
|
buf[1] = ch; |
|
buffer_append(&stdin_buffer, buf, 2); |
|
stdin_bytes += 2; |
|
continue; |
|
} |
|
/* |
|
* Note that escape character typed twice |
|
* falls through here; the latter gets processed |
|
* as a normal character below. |
|
*/ |
|
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'); |
|
buf[0] = ch; |
|
buffer_append(&stdin_buffer, buf, 1); |
|
stdin_bytes += 1; |
|
continue; |
|
} |
} |
} |
} |
} |
} |
} |
|
|
*/ |
*/ |
snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno)); |
snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
stderr_bytes += strlen(buf); |
quit_pending = 1; |
quit_pending = 1; |
return; |
return; |
} |
} |
} |
} |
/* Consume printed data from the buffer. */ |
/* Consume printed data from the buffer. */ |
buffer_consume(&stdout_buffer, len); |
buffer_consume(&stdout_buffer, len); |
stdout_bytes += len; |
|
} |
} |
/* Write buffered output to stderr. */ |
/* Write buffered output to stderr. */ |
if (FD_ISSET(fileno(stderr), writeset)) { |
if (FD_ISSET(fileno(stderr), writeset)) { |
|
|
} |
} |
/* Consume printed characters from the buffer. */ |
/* Consume printed characters from the buffer. */ |
buffer_consume(&stderr_buffer, len); |
buffer_consume(&stderr_buffer, len); |
stderr_bytes += len; |
|
} |
} |
} |
} |
|
|
|
|
*/ |
*/ |
|
|
void |
void |
client_process_buffered_input_packets(void) |
client_process_buffered_input_packets() |
{ |
{ |
dispatch_run(DISPATCH_NONBLOCK, &quit_pending, NULL); |
dispatch_run(DISPATCH_NONBLOCK, &quit_pending); |
} |
} |
|
|
/* scan buf[] for '~' before sending data to the peer */ |
|
|
|
int |
|
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); |
|
} |
|
|
|
/* |
/* |
* Implements the interactive session with the server. This is called after |
* Implements the interactive session with the server. This is called after |
* the user has been authenticated, and a command has been started on the |
* the user has been authenticated, and a command has been started on the |
|
|
*/ |
*/ |
|
|
int |
int |
client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id) |
client_loop(int have_pty, int escape_char_arg) |
{ |
{ |
fd_set *readset = NULL, *writeset = NULL; |
extern Options options; |
int max_fd = 0; |
|
double start_time, total_time; |
double start_time, total_time; |
int len; |
int len; |
char buf[100]; |
char buf[100]; |
|
|
buffer_high = 64 * 1024; |
buffer_high = 64 * 1024; |
connection_in = packet_get_connection_in(); |
connection_in = packet_get_connection_in(); |
connection_out = packet_get_connection_out(); |
connection_out = packet_get_connection_out(); |
max_fd = MAX(connection_in, connection_out); |
max_fd = connection_in; |
|
if (connection_out > max_fd) |
if (!compat20) { |
max_fd = connection_out; |
max_fd = MAX(max_fd, fileno(stdin)); |
|
max_fd = MAX(max_fd, fileno(stdout)); |
|
max_fd = MAX(max_fd, fileno(stderr)); |
|
} |
|
stdin_bytes = 0; |
stdin_bytes = 0; |
stdout_bytes = 0; |
stdout_bytes = 0; |
stderr_bytes = 0; |
stderr_bytes = 0; |
|
|
if (have_pty) |
if (have_pty) |
enter_raw_mode(); |
enter_raw_mode(); |
|
|
if (compat20) { |
/* Check if we should immediately send of on stdin. */ |
session_ident = ssh2_chan_id; |
if (!compat20) |
if (escape_char != -1) |
|
channel_register_filter(session_ident, |
|
simple_escape_filter); |
|
} else { |
|
/* Check if we should immediately send eof on stdin. */ |
|
client_check_initial_eof_on_stdin(); |
client_check_initial_eof_on_stdin(); |
} |
|
|
|
/* Main loop of the client for the interactive session mode. */ |
/* Main loop of the client for the interactive session mode. */ |
while (!quit_pending) { |
while (!quit_pending) { |
|
fd_set readset, writeset; |
|
|
/* Process buffered packets sent by the server. */ |
/* Process buffered packets sent by the server. */ |
client_process_buffered_input_packets(); |
client_process_buffered_input_packets(); |
|
|
if (compat20 && !channel_still_open()) { |
if (compat20 && !channel_still_open()) { |
debug2("!channel_still_open."); |
debug("!channel_still_open."); |
break; |
break; |
} |
} |
|
|
|
|
client_make_packets_from_stdin_data(); |
client_make_packets_from_stdin_data(); |
|
|
/* |
/* |
* Make packets from buffered channel data, and enqueue them |
* Make packets from buffered channel data, and buffer them |
* for sending to the server. |
* for sending to the server. |
*/ |
*/ |
if (packet_not_very_much_data_to_write()) |
if (packet_not_very_much_data_to_write()) |
|
|
* Wait until we have something to do (something becomes |
* Wait until we have something to do (something becomes |
* available on one of the descriptors). |
* available on one of the descriptors). |
*/ |
*/ |
client_wait_until_can_do_something(&readset, &writeset, &max_fd); |
client_wait_until_can_do_something(&readset, &writeset); |
|
|
if (quit_pending) |
if (quit_pending) |
break; |
break; |
|
|
/* Do channel operations. */ |
/* Do channel operations. */ |
channel_after_select(readset, writeset); |
channel_after_select(&readset, &writeset); |
|
|
/* Buffer input from the connection. */ |
/* Buffer input from the connection. */ |
client_process_net_input(readset); |
client_process_net_input(&readset); |
|
|
if (quit_pending) |
if (quit_pending) |
break; |
break; |
|
|
if (!compat20) { |
if (!compat20) { |
/* Buffer data from stdin */ |
/* Buffer data from stdin */ |
client_process_input(readset); |
client_process_input(&readset); |
/* |
/* |
* Process output to stdout and stderr. Output to |
* Process output to stdout and stderr. Output to |
* the connection is processed elsewhere (above). |
* the connection is processed elsewhere (above). |
*/ |
*/ |
client_process_output(writeset); |
client_process_output(&writeset); |
} |
} |
|
|
/* Send as much buffered packet data as possible to the sender. */ |
/* Send as much buffered packet data as possible to the sender. */ |
if (FD_ISSET(connection_out, writeset)) |
if (FD_ISSET(connection_out, &writeset)) |
packet_write_poll(); |
packet_write_poll(); |
} |
} |
if (readset) |
|
xfree(readset); |
|
if (writeset) |
|
xfree(writeset); |
|
|
|
/* Terminate the session. */ |
/* Terminate the session. */ |
|
|
|
|
if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { |
if (have_pty && options.log_level != SYSLOG_LEVEL_QUIET) { |
snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host); |
snprintf(buf, sizeof buf, "Connection to %.64s closed.\r\n", host); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
buffer_append(&stderr_buffer, buf, strlen(buf)); |
|
stderr_bytes += strlen(buf); |
} |
} |
/* Output any buffered data for stdout. */ |
/* Output any buffered data for stdout. */ |
while (buffer_len(&stdout_buffer) > 0) { |
while (buffer_len(&stdout_buffer) > 0) { |
|
|
break; |
break; |
} |
} |
buffer_consume(&stdout_buffer, len); |
buffer_consume(&stdout_buffer, len); |
stdout_bytes += len; |
|
} |
} |
|
|
/* Output any buffered data for stderr. */ |
/* Output any buffered data for stderr. */ |
|
|
break; |
break; |
} |
} |
buffer_consume(&stderr_buffer, len); |
buffer_consume(&stderr_buffer, len); |
stderr_bytes += len; |
|
} |
} |
|
|
if (have_pty) |
if (have_pty) |
|
|
/*********/ |
/*********/ |
|
|
void |
void |
client_input_stdout_data(int type, int plen, void *ctxt) |
client_input_stdout_data(int type, int plen) |
{ |
{ |
u_int data_len; |
unsigned int data_len; |
char *data = packet_get_string(&data_len); |
char *data = packet_get_string(&data_len); |
packet_integrity_check(plen, 4 + data_len, type); |
packet_integrity_check(plen, 4 + data_len, type); |
buffer_append(&stdout_buffer, data, data_len); |
buffer_append(&stdout_buffer, data, data_len); |
|
stdout_bytes += data_len; |
memset(data, 0, data_len); |
memset(data, 0, data_len); |
xfree(data); |
xfree(data); |
} |
} |
void |
void |
client_input_stderr_data(int type, int plen, void *ctxt) |
client_input_stderr_data(int type, int plen) |
{ |
{ |
u_int data_len; |
unsigned int data_len; |
char *data = packet_get_string(&data_len); |
char *data = packet_get_string(&data_len); |
packet_integrity_check(plen, 4 + data_len, type); |
packet_integrity_check(plen, 4 + data_len, type); |
buffer_append(&stderr_buffer, data, data_len); |
buffer_append(&stderr_buffer, data, data_len); |
|
stdout_bytes += data_len; |
memset(data, 0, data_len); |
memset(data, 0, data_len); |
xfree(data); |
xfree(data); |
} |
} |
void |
void |
client_input_exit_status(int type, int plen, void *ctxt) |
client_input_exit_status(int type, int plen) |
{ |
{ |
packet_integrity_check(plen, 4, type); |
packet_integrity_check(plen, 4, type); |
exit_status = packet_get_int(); |
exit_status = packet_get_int(); |
|
|
quit_pending = 1; |
quit_pending = 1; |
} |
} |
|
|
Channel * |
|
client_request_forwarded_tcpip(const char *request_type, int rchan) |
|
{ |
|
Channel* c = NULL; |
|
char *listen_address, *originator_address; |
|
int listen_port, originator_port; |
|
int sock, newch; |
|
|
|
/* 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(); |
|
packet_done(); |
|
|
|
debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d", |
|
listen_address, listen_port, originator_address, originator_port); |
|
|
|
sock = channel_connect_by_listen_adress(listen_port); |
|
if (sock >= 0) { |
|
newch = channel_new("forwarded-tcpip", |
|
SSH_CHANNEL_CONNECTING, sock, sock, -1, |
|
CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, |
|
xstrdup(originator_address), 1); |
|
c = channel_lookup(newch); |
|
} |
|
xfree(originator_address); |
|
xfree(listen_address); |
|
return c; |
|
} |
|
|
|
Channel* |
|
client_request_x11(const char *request_type, int rchan) |
|
{ |
|
Channel *c = NULL; |
|
char *originator; |
|
int originator_port; |
|
int sock, newch; |
|
|
|
if (!options.forward_x11) { |
|
error("Warning: ssh server tried X11 forwarding."); |
|
error("Warning: this is probably a break in attempt by a malicious server."); |
|
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(); |
|
} |
|
packet_done(); |
|
/* XXX check permission */ |
|
debug("client_request_x11: request from %s %d", originator, |
|
originator_port); |
|
sock = x11_connect_display(); |
|
if (sock >= 0) { |
|
newch = channel_new("x11", |
|
SSH_CHANNEL_X11_OPEN, sock, sock, -1, |
|
CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0, |
|
xstrdup("x11"), 1); |
|
c = channel_lookup(newch); |
|
} |
|
xfree(originator); |
|
return c; |
|
} |
|
|
|
Channel* |
|
client_request_agent(const char *request_type, int rchan) |
|
{ |
|
Channel *c = NULL; |
|
int sock, newch; |
|
|
|
if (!options.forward_agent) { |
|
error("Warning: ssh server tried agent forwarding."); |
|
error("Warning: this is probably a break in attempt by a malicious server."); |
|
return NULL; |
|
} |
|
sock = ssh_get_authentication_socket(); |
|
if (sock >= 0) { |
|
newch = channel_new("authentication agent connection", |
|
SSH_CHANNEL_OPEN, sock, sock, -1, |
|
CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0, |
|
xstrdup("authentication agent connection"), 1); |
|
c = channel_lookup(newch); |
|
} |
|
return c; |
|
} |
|
|
|
/* XXXX move to generic input handler */ |
/* XXXX move to generic input handler */ |
void |
void |
client_input_channel_open(int type, int plen, void *ctxt) |
client_input_channel_open(int type, int plen) |
{ |
{ |
Channel *c = NULL; |
Channel *c = NULL; |
char *ctype; |
char *ctype; |
u_int len; |
int id; |
|
unsigned int len; |
int rchan; |
int rchan; |
int rmaxpack; |
int rmaxpack; |
int rwindow; |
int rwindow; |
|
|
debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
debug("client_input_channel_open: ctype %s rchan %d win %d max %d", |
ctype, rchan, rwindow, rmaxpack); |
ctype, rchan, rwindow, rmaxpack); |
|
|
if (strcmp(ctype, "forwarded-tcpip") == 0) { |
if (strcmp(ctype, "x11") == 0) { |
c = client_request_forwarded_tcpip(ctype, rchan); |
int sock; |
} else if (strcmp(ctype, "x11") == 0) { |
char *originator; |
c = client_request_x11(ctype, rchan); |
int originator_port; |
} else if (strcmp(ctype, "auth-agent@openssh.com") == 0) { |
originator = packet_get_string(NULL); |
c = client_request_agent(ctype, rchan); |
if (datafellows & SSH_BUG_X11FWD) { |
|
debug("buggy server: x11 request w/o originator_port"); |
|
originator_port = 0; |
|
} else { |
|
originator_port = packet_get_int(); |
|
} |
|
packet_done(); |
|
/* XXX check permission */ |
|
xfree(originator); |
|
/* XXX move to channels.c */ |
|
sock = x11_connect_display(); |
|
if (sock >= 0) { |
|
id = channel_new("x11", SSH_CHANNEL_X11_OPEN, |
|
sock, sock, -1, 4*1024, 32*1024, 0, |
|
xstrdup("x11")); |
|
c = channel_lookup(id); |
|
} |
} |
} |
/* XXX duplicate : */ |
/* XXX duplicate : */ |
if (c != NULL) { |
if (c != NULL) { |
|
|
} |
} |
xfree(ctype); |
xfree(ctype); |
} |
} |
void |
|
client_input_channel_req(int type, int plen, void *ctxt) |
|
{ |
|
Channel *c = NULL; |
|
int id, reply, success = 0; |
|
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); |
|
|
|
if (session_ident == -1) { |
|
error("client_input_channel_req: no channel %d", session_ident); |
|
} else if (id != session_ident) { |
|
error("client_input_channel_req: channel %d: wrong channel: %d", |
|
session_ident, id); |
|
} |
|
c = channel_lookup(id); |
|
if (c == NULL) { |
|
error("client_input_channel_req: channel %d: unknown channel", id); |
|
} else if (strcmp(rtype, "exit-status") == 0) { |
|
success = 1; |
|
exit_status = packet_get_int(); |
|
packet_done(); |
|
} |
|
if (reply) { |
|
packet_start(success ? |
|
SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); |
|
packet_put_int(c->remote_id); |
|
packet_send(); |
|
} |
|
xfree(rtype); |
|
} |
|
|
|
void |
void |
client_init_dispatch_20(void) |
client_init_dispatch_20() |
{ |
{ |
dispatch_init(&dispatch_protocol_error); |
dispatch_init(&dispatch_protocol_error); |
dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
dispatch_set(SSH2_MSG_CHANNEL_CLOSE, &channel_input_oclose); |
|
|
dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
dispatch_set(SSH2_MSG_CHANNEL_OPEN, &client_input_channel_open); |
dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
dispatch_set(SSH2_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
dispatch_set(SSH2_MSG_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req); |
dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &channel_input_channel_request); |
dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust); |
} |
} |
void |
void |
client_init_dispatch_13(void) |
client_init_dispatch_13() |
{ |
{ |
dispatch_init(NULL); |
dispatch_init(NULL); |
dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); |
dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_close); |
|
|
dispatch_set(SSH_MSG_CHANNEL_OPEN_CONFIRMATION, &channel_input_open_confirmation); |
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_CHANNEL_OPEN_FAILURE, &channel_input_open_failure); |
dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); |
dispatch_set(SSH_MSG_PORT_OPEN, &channel_input_port_open); |
|
dispatch_set(SSH_SMSG_AGENT_OPEN, &auth_input_open_request); |
dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
dispatch_set(SSH_SMSG_EXITSTATUS, &client_input_exit_status); |
dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); |
dispatch_set(SSH_SMSG_STDERR_DATA, &client_input_stderr_data); |
dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); |
dispatch_set(SSH_SMSG_STDOUT_DATA, &client_input_stdout_data); |
|
dispatch_set(SSH_SMSG_X11_OPEN, &x11_input_open); |
dispatch_set(SSH_SMSG_AGENT_OPEN, options.forward_agent ? |
|
&auth_input_open_request : &deny_input_open); |
|
dispatch_set(SSH_SMSG_X11_OPEN, options.forward_x11 ? |
|
&x11_input_open : &deny_input_open); |
|
} |
} |
void |
void |
client_init_dispatch_15(void) |
client_init_dispatch_15() |
{ |
{ |
client_init_dispatch_13(); |
client_init_dispatch_13(); |
dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); |
dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof); |
dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); |
dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose); |
} |
} |
void |
void |
client_init_dispatch(void) |
client_init_dispatch() |
{ |
{ |
if (compat20) |
if (compat20) |
client_init_dispatch_20(); |
client_init_dispatch_20(); |
|
|
client_init_dispatch_13(); |
client_init_dispatch_13(); |
else |
else |
client_init_dispatch_15(); |
client_init_dispatch_15(); |
|
} |
|
|
|
void |
|
client_input_channel_req(int id, void *arg) |
|
{ |
|
Channel *c = NULL; |
|
unsigned int len; |
|
int success = 0; |
|
int reply; |
|
char *rtype; |
|
|
|
rtype = packet_get_string(&len); |
|
reply = packet_get_char(); |
|
|
|
debug("client_input_channel_req: rtype %s reply %d", rtype, reply); |
|
|
|
c = channel_lookup(id); |
|
if (c == NULL) |
|
fatal("session_input_channel_req: channel %d: bad channel", id); |
|
|
|
if (session_ident == -1) { |
|
error("client_input_channel_req: no channel %d", id); |
|
} else if (id != session_ident) { |
|
error("client_input_channel_req: bad channel %d != %d", |
|
id, session_ident); |
|
} else if (strcmp(rtype, "exit-status") == 0) { |
|
success = 1; |
|
exit_status = packet_get_int(); |
|
packet_done(); |
|
} |
|
if (reply) { |
|
packet_start(success ? |
|
SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); |
|
packet_put_int(c->remote_id); |
|
packet_send(); |
|
} |
|
xfree(rtype); |
|
} |
|
|
|
void |
|
client_set_session_ident(int id) |
|
{ |
|
debug("client_set_session_ident: id %d", id); |
|
session_ident = id; |
|
channel_register_callback(id, SSH2_MSG_CHANNEL_REQUEST, |
|
client_input_channel_req, (void *)0); |
} |
} |