/*
- *
- * clientloop.c
- *
* Author: Tatu Ylonen <ylo@cs.hut.fi>
- *
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
- *
- *
- * Created: Sat Sep 23 12:23:57 1995 ylo
- *
* The main loop for the interactive session (client side).
- *
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ *
+ *
+ * Copyright (c) 1999 Theo de Raadt. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * SSH2 support added by Markus Friedl.
+ * Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: clientloop.c,v 1.72 2001/05/24 18:57:53 stevesk Exp $");
-#include "xmalloc.h"
#include "ssh.h"
+#include "ssh1.h"
+#include "ssh2.h"
+#include "xmalloc.h"
#include "packet.h"
#include "buffer.h"
-#include "authfd.h"
+#include "compat.h"
+#include "channels.h"
+#include "dispatch.h"
+#include "buffer.h"
+#include "bufaux.h"
+#include "key.h"
+#include "kex.h"
+#include "log.h"
#include "readconf.h"
+#include "clientloop.h"
+#include "authfd.h"
+#include "atomicio.h"
+#include "sshtty.h"
+#include "misc.h"
+
+/* import options */
+extern Options options;
/* Flag indicating that stdin should be redirected from /dev/null. */
extern int stdin_null_flag;
*/
static volatile int received_window_change_signal = 0;
-/* Terminal modes, as saved by enter_raw_mode. */
-static struct termios saved_tio;
-
-/*
- * Flag indicating whether we are in raw mode. This is used by
- * enter_raw_mode and leave_raw_mode.
- */
-static int in_raw_mode = 0;
-
/* Flag indicating whether the user\'s terminal is in non-blocking mode. */
static int in_non_blocking_mode = 0;
/* Common data for the client loop code. */
+static int quit_pending; /* Set to non-zero to quit the client loop. */
+static int escape_char; /* Escape character. */
static int escape_pending; /* Last character was the escape character */
static int last_was_cr; /* Last character was a newline. */
static int exit_status; /* Used to store the exit status of the command. */
static Buffer stdin_buffer; /* Buffer for stdin data. */
static Buffer stdout_buffer; /* Buffer for stdout data. */
static Buffer stderr_buffer; /* Buffer for stderr data. */
-static unsigned int buffer_high;/* Soft max buffer size. */
-static int max_fd; /* Maximum file descriptor number in select(). */
+static u_long stdin_bytes, stdout_bytes, stderr_bytes;
+static u_int buffer_high;/* Soft max buffer size. */
static int connection_in; /* Connection to server (input). */
static int connection_out; /* Connection to server (output). */
-static unsigned long stdin_bytes, stdout_bytes, stderr_bytes;
-static int quit_pending; /* Set to non-zero to quit the client loop. */
-static int escape_char; /* Escape character. */
-
-/* Returns the user\'s terminal to normal mode if it had been put in raw mode. */
-
-void
-leave_raw_mode()
-{
- if (!in_raw_mode)
- return;
- in_raw_mode = 0;
- if (tcsetattr(fileno(stdin), TCSADRAIN, &saved_tio) < 0)
- perror("tcsetattr");
+static int need_rekeying; /* Set to non-zero if rekeying is requested. */
+static int session_closed = 0; /* In SSH2: login session closed. */
- fatal_remove_cleanup((void (*) (void *)) leave_raw_mode, NULL);
-}
+void client_init_dispatch(void);
+int session_ident = -1;
-/* Puts the user\'s terminal in raw mode. */
-
-void
-enter_raw_mode()
-{
- struct termios tio;
-
- if (tcgetattr(fileno(stdin), &tio) < 0)
- perror("tcgetattr");
- saved_tio = tio;
- tio.c_iflag |= IGNPAR;
- tio.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL | IXON | IXANY | IXOFF);
- tio.c_lflag &= ~(ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHONL);
-#ifdef IEXTEN
- tio.c_lflag &= ~IEXTEN;
-#endif /* IEXTEN */
- tio.c_oflag &= ~OPOST;
- tio.c_cc[VMIN] = 1;
- tio.c_cc[VTIME] = 0;
- if (tcsetattr(fileno(stdin), TCSADRAIN, &tio) < 0)
- perror("tcsetattr");
- in_raw_mode = 1;
-
- fatal_add_cleanup((void (*) (void *)) leave_raw_mode, NULL);
-}
+/*XXX*/
+extern Kex *xxx_kex;
/* Restores stdin to blocking mode. */
-void
-leave_non_blocking()
+void
+leave_non_blocking(void)
{
if (in_non_blocking_mode) {
(void) fcntl(fileno(stdin), F_SETFL, 0);
/* Puts stdin terminal in non-blocking mode. */
-void
-enter_non_blocking()
+void
+enter_non_blocking(void)
{
in_non_blocking_mode = 1;
(void) fcntl(fileno(stdin), F_SETFL, O_NONBLOCK);
* flag indicating that the window has changed.
*/
-void
+void
window_change_handler(int sig)
{
received_window_change_signal = 1;
* signals must be trapped to restore terminal modes.
*/
-void
+void
signal_handler(int sig)
{
- if (in_raw_mode)
+ if (in_raw_mode())
leave_raw_mode();
if (in_non_blocking_mode)
leave_non_blocking();
* available resolution.
*/
-double
-get_current_time()
+double
+get_current_time(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
* not appear to wake up when redirecting from /dev/null.
*/
-void
-client_check_initial_eof_on_stdin()
+void
+client_check_initial_eof_on_stdin(void)
{
int len;
char buf[1];
* and also process it as an escape character if
* appropriate.
*/
- if ((unsigned char) buf[0] == escape_char)
+ if ((u_char) buf[0] == escape_char)
escape_pending = 1;
- else {
+ else
buffer_append(&stdin_buffer, buf, 1);
- stdin_bytes += 1;
- }
}
leave_non_blocking();
}
}
-/*
- * Get packets from the connection input buffer, and process them as long as
- * there are packets available.
- */
-
-void
-client_process_buffered_input_packets()
-{
- int type;
- char *data;
- unsigned int data_len;
- int payload_len;
-
- /* Process any buffered packets from the server. */
- while (!quit_pending &&
- (type = packet_read_poll(&payload_len)) != SSH_MSG_NONE) {
- switch (type) {
-
- case SSH_SMSG_STDOUT_DATA:
- data = packet_get_string(&data_len);
- packet_integrity_check(payload_len, 4 + data_len, type);
- buffer_append(&stdout_buffer, data, data_len);
- stdout_bytes += data_len;
- memset(data, 0, data_len);
- xfree(data);
- break;
-
- case SSH_SMSG_STDERR_DATA:
- data = packet_get_string(&data_len);
- packet_integrity_check(payload_len, 4 + data_len, type);
- buffer_append(&stderr_buffer, data, data_len);
- stdout_bytes += data_len;
- memset(data, 0, data_len);
- xfree(data);
- break;
-
- case SSH_SMSG_EXITSTATUS:
- packet_integrity_check(payload_len, 4, type);
- exit_status = packet_get_int();
- /* 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;
- break;
-
- case SSH_SMSG_X11_OPEN:
- x11_input_open(payload_len);
- break;
-
- case SSH_MSG_PORT_OPEN:
- channel_input_port_open(payload_len);
- break;
-
- case SSH_SMSG_AGENT_OPEN:
- packet_integrity_check(payload_len, 4, type);
- auth_input_open_request();
- break;
-
- case SSH_MSG_CHANNEL_OPEN_CONFIRMATION:
- packet_integrity_check(payload_len, 4 + 4, type);
- channel_input_open_confirmation();
- break;
-
- case SSH_MSG_CHANNEL_OPEN_FAILURE:
- packet_integrity_check(payload_len, 4, type);
- channel_input_open_failure();
- break;
-
- case SSH_MSG_CHANNEL_DATA:
- channel_input_data(payload_len);
- break;
-
- case SSH_MSG_CHANNEL_CLOSE:
- packet_integrity_check(payload_len, 4, type);
- channel_input_close();
- break;
-
- case SSH_MSG_CHANNEL_CLOSE_CONFIRMATION:
- packet_integrity_check(payload_len, 4, type);
- channel_input_close_confirmation();
- break;
-
- default:
- /*
- * 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.
- */
- packet_disconnect("Protocol error during session: type %d",
- type);
- }
- }
-}
/*
* Make packets from buffered stdin data, and buffer them for sending to the
* connection.
*/
-void
-client_make_packets_from_stdin_data()
+void
+client_make_packets_from_stdin_data(void)
{
- unsigned int len;
+ u_int len;
/* Send buffered stdin data to the server. */
while (buffer_len(&stdin_buffer) > 0 &&
packet_put_string(buffer_ptr(&stdin_buffer), len);
packet_send();
buffer_consume(&stdin_buffer, len);
+ stdin_bytes += len;
/* If we have a pending EOF, send it now. */
if (stdin_eof && buffer_len(&stdin_buffer) == 0) {
packet_start(SSH_CMSG_EOF);
* appropriate.
*/
-void
-client_check_window_change()
+void
+client_check_window_change(void)
{
- /* Send possible window change message to the server. */
- if (received_window_change_signal) {
- struct winsize ws;
-
- /* Clear the window change indicator. */
- received_window_change_signal = 0;
-
- /* Read new window size. */
- if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) >= 0) {
- /* Successful, send the packet now. */
- packet_start(SSH_CMSG_WINDOW_SIZE);
- packet_put_int(ws.ws_row);
- packet_put_int(ws.ws_col);
- packet_put_int(ws.ws_xpixel);
- packet_put_int(ws.ws_ypixel);
- packet_send();
- }
+ struct winsize ws;
+
+ if (! received_window_change_signal)
+ return;
+ /** XXX race */
+ received_window_change_signal = 0;
+
+ if (ioctl(fileno(stdin), TIOCGWINSZ, &ws) < 0)
+ return;
+
+ debug2("client_check_window_change: changed");
+
+ if (compat20) {
+ channel_request_start(session_ident, "window-change", 0);
+ packet_put_int(ws.ws_col);
+ packet_put_int(ws.ws_row);
+ packet_put_int(ws.ws_xpixel);
+ packet_put_int(ws.ws_ypixel);
+ packet_send();
+ } else {
+ packet_start(SSH_CMSG_WINDOW_SIZE);
+ packet_put_int(ws.ws_row);
+ packet_put_int(ws.ws_col);
+ packet_put_int(ws.ws_xpixel);
+ packet_put_int(ws.ws_ypixel);
+ packet_send();
}
}
* one of the file descriptors).
*/
-void
-client_wait_until_can_do_something(fd_set * readset, fd_set * writeset)
+void
+client_wait_until_can_do_something(fd_set **readsetp, fd_set **writesetp,
+ int *maxfdp, int rekeying)
{
- /* Initialize select masks. */
- FD_ZERO(readset);
-
- /* 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())
- FD_SET(connection_in, readset);
-
- /*
- * 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())
- FD_SET(fileno(stdin), readset);
-
- FD_ZERO(writeset);
-
/* Add any selections by the channel mechanism. */
- channel_prepare_select(readset, writeset);
+ channel_prepare_select(readsetp, writesetp, maxfdp, rekeying);
+
+ 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())
+ FD_SET(connection_in, *readsetp);
+ /*
+ * 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())
+ FD_SET(fileno(stdin), *readsetp);
+
+ /* Select stdout/stderr if have data in buffer. */
+ if (buffer_len(&stdout_buffer) > 0)
+ FD_SET(fileno(stdout), *writesetp);
+ if (buffer_len(&stderr_buffer) > 0)
+ FD_SET(fileno(stderr), *writesetp);
+ } else {
+ /* channel_prepare_select could have closed the last channel */
+ if (session_closed && !channel_still_open()) {
+ if (!packet_have_data_to_write())
+ return;
+ } else {
+ FD_SET(connection_in, *readsetp);
+ }
+ }
/* Select server connection if have data to write to the server. */
if (packet_have_data_to_write())
- FD_SET(connection_out, writeset);
-
- /* Select stdout if have data in buffer. */
- if (buffer_len(&stdout_buffer) > 0)
- FD_SET(fileno(stdout), writeset);
-
- /* Select stderr if have data in buffer. */
- if (buffer_len(&stderr_buffer) > 0)
- FD_SET(fileno(stderr), writeset);
-
- /* Update maximum file descriptor number, if appropriate. */
- if (channel_max_fd() > max_fd)
- max_fd = channel_max_fd();
+ FD_SET(connection_out, *writesetp);
/*
* Wait for something to happen. This will suspend the process until
* SSH_MSG_IGNORE packet when the timeout expires.
*/
- if (select(max_fd + 1, readset, writeset, NULL, NULL) < 0) {
+ if (select((*maxfdp)+1, *readsetp, *writesetp, NULL, NULL) < 0) {
char buf[100];
- /* Some systems fail to clear these automatically. */
- FD_ZERO(readset);
- FD_ZERO(writeset);
+
+ /*
+ * 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.
+ */
+ memset(*readsetp, 0, *maxfdp);
+ memset(*writesetp, 0, *maxfdp);
+
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));
- stderr_bytes += strlen(buf);
quit_pending = 1;
}
}
-void
-client_suspend_self()
+void
+client_suspend_self(Buffer *bin, Buffer *bout, Buffer *berr)
{
struct winsize oldws, newws;
/* Flush stdout and stderr buffers. */
- if (buffer_len(&stdout_buffer) > 0)
- write(fileno(stdout),
- buffer_ptr(&stdout_buffer),
- buffer_len(&stdout_buffer));
- if (buffer_len(&stderr_buffer) > 0)
- write(fileno(stderr),
- buffer_ptr(&stderr_buffer),
- buffer_len(&stderr_buffer));
+ if (buffer_len(bout) > 0)
+ atomicio(write, fileno(stdout), buffer_ptr(bout), buffer_len(bout));
+ if (buffer_len(berr) > 0)
+ atomicio(write, fileno(stderr), buffer_ptr(berr), buffer_len(berr));
leave_raw_mode();
* Free (and clear) the buffer to reduce the amount of data that gets
* written to swap.
*/
- buffer_free(&stdin_buffer);
- buffer_free(&stdout_buffer);
- buffer_free(&stderr_buffer);
+ buffer_free(bin);
+ buffer_free(bout);
+ buffer_free(berr);
/* Save old window size. */
ioctl(fileno(stdin), TIOCGWINSZ, &oldws);
received_window_change_signal = 1;
/* OK, we have been continued by the user. Reinitialize buffers. */
- buffer_init(&stdin_buffer);
- buffer_init(&stdout_buffer);
- buffer_init(&stderr_buffer);
+ buffer_init(bin);
+ buffer_init(bout);
+ buffer_init(berr);
enter_raw_mode();
}
-void
-client_process_input(fd_set * readset)
+void
+client_process_net_input(fd_set * readset)
{
- int len, pid;
- char buf[8192], *s;
+ int len;
+ char buf[8192];
/*
* Read input from the server, and add any such data to the buffer of
snprintf(buf, sizeof buf, "Connection to %.300s closed by remote host.\r\n",
host);
buffer_append(&stderr_buffer, buf, strlen(buf));
- stderr_bytes += strlen(buf);
quit_pending = 1;
return;
}
* There is a kernel bug on Solaris that causes select to
* sometimes wake up even though there is no data available.
*/
- if (len < 0 && errno == EAGAIN)
+ if (len < 0 && (errno == EAGAIN || errno == EINTR))
len = 0;
if (len < 0) {
snprintf(buf, sizeof buf, "Read from remote host %.300s: %.100s\r\n",
host, strerror(errno));
buffer_append(&stderr_buffer, buf, strlen(buf));
- stderr_bytes += strlen(buf);
quit_pending = 1;
return;
}
packet_process_incoming(buf, len);
}
+}
+
+/* process the characters one by one */
+int
+process_escapes(Buffer *bin, Buffer *bout, Buffer *berr, char *buf, int len)
+{
+ char string[1024];
+ pid_t pid;
+ int bytes = 0;
+ u_int i;
+ u_char ch;
+ char *s;
+
+ for (i = 0; i < len; i++) {
+ /* 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;
+
+ case 'R':
+ if (compat20) {
+ if (datafellows & SSH_BUG_NOREKEY)
+ log("Server does not support re-keying");
+ else
+ need_rekeying = 1;
+ }
+ continue;
+
+ case '&':
+ /* XXX does not work yet with proto 2 */
+ if (compat20)
+ continue;
+ /*
+ * 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(bin) == 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; /*XXX ? */
+
+ case '?':
+ snprintf(string, sizeof string,
+"%c?\r\n\
+Supported escape sequences:\r\n\
+~. - terminate connection\r\n\
+~R - Request rekey (SSH protocol 2 only)\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(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;
+
+ 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
+client_process_input(fd_set * readset)
+{
+ int len;
+ char buf[8192];
+
/* Read input from stdin. */
if (FD_ISSET(fileno(stdin), readset)) {
/* Read as much as possible. */
len = read(fileno(stdin), buf, sizeof(buf));
+ if (len < 0 && (errno == EAGAIN || errno == EINTR))
+ return; /* we'll try again later */
if (len <= 0) {
/*
* Received EOF or error. They are treated
if (len < 0) {
snprintf(buf, sizeof buf, "read: %.100s\r\n", strerror(errno));
buffer_append(&stderr_buffer, buf, strlen(buf));
- stderr_bytes += strlen(buf);
}
/* Mark that we have seen EOF. */
stdin_eof = 1;
packet_start(SSH_CMSG_EOF);
packet_send();
}
- } else if (escape_char == -1) {
+ } else if (escape_char == SSH_ESCAPECHAR_NONE) {
/*
* Normal successful read, and no escape character.
* Just append the data to buffer.
*/
buffer_append(&stdin_buffer, buf, len);
- stdin_bytes += len;
} else {
/*
* Normal, successful read. But we have an escape character
* and have to process the characters one by one.
*/
- unsigned int i;
- for (i = 0; i < len; i++) {
- 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;
- }
+ if (process_escapes(&stdin_buffer, &stdout_buffer,
+ &stderr_buffer, buf, len) == -1)
+ return;
}
}
}
-void
+void
client_process_output(fd_set * writeset)
{
int len;
if (FD_ISSET(fileno(stdout), writeset)) {
/* Write as much data as possible. */
len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
- buffer_len(&stdout_buffer));
+ buffer_len(&stdout_buffer));
if (len <= 0) {
- if (errno == EAGAIN)
+ if (errno == EINTR || errno == EAGAIN)
len = 0;
else {
/*
*/
snprintf(buf, sizeof buf, "write stdout: %.50s\r\n", strerror(errno));
buffer_append(&stderr_buffer, buf, strlen(buf));
- stderr_bytes += strlen(buf);
quit_pending = 1;
return;
}
}
/* Consume printed data from the buffer. */
buffer_consume(&stdout_buffer, len);
+ stdout_bytes += len;
}
/* 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),
- buffer_len(&stderr_buffer));
+ buffer_len(&stderr_buffer));
if (len <= 0) {
- if (errno == EAGAIN)
+ if (errno == EINTR || errno == EAGAIN)
len = 0;
else {
/* EOF or error, but can't even print error message. */
}
/* Consume printed characters from the buffer. */
buffer_consume(&stderr_buffer, len);
+ stderr_bytes += len;
}
}
+/*
+ * 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.
+ */
+
+void
+client_process_buffered_input_packets(void)
+{
+ dispatch_run(DISPATCH_NONBLOCK, &quit_pending, compat20 ? xxx_kex : NULL);
+}
+
+/* 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);
+}
+
+void
+client_channel_closed(int id, void *arg)
+{
+ if (id != session_ident)
+ error("client_channel_closed: id %d != session_ident %d",
+ id, session_ident);
+ session_closed = 1;
+ if (in_raw_mode())
+ leave_raw_mode();
+}
+
/*
* Implements the interactive session with the server. This is called after
* the user has been authenticated, and a command has been started on the
- * remote host. If escape_char != -1, it is the character used as an escape
- * character for terminating or suspending the session.
+ * remote host. If escape_char != SSH_ESCAPECHAR_NONE, it is the character
+ * used as an escape character for terminating or suspending the session.
*/
-int
-client_loop(int have_pty, int escape_char_arg)
+int
+client_loop(int have_pty, int escape_char_arg, int ssh2_chan_id)
{
- extern Options options;
+ fd_set *readset = NULL, *writeset = NULL;
double start_time, total_time;
- int len;
+ int max_fd = 0, len, rekeying = 0;
char buf[100];
debug("Entering interactive session.");
buffer_high = 64 * 1024;
connection_in = packet_get_connection_in();
connection_out = packet_get_connection_out();
- max_fd = connection_in;
- if (connection_out > max_fd)
- max_fd = connection_out;
+ max_fd = MAX(connection_in, connection_out);
+
+ if (!compat20) {
+ /* 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));
+ max_fd = MAX(max_fd, fileno(stdin));
+ max_fd = MAX(max_fd, fileno(stdout));
+ max_fd = MAX(max_fd, fileno(stderr));
+ }
stdin_bytes = 0;
stdout_bytes = 0;
stderr_bytes = 0;
buffer_init(&stdout_buffer);
buffer_init(&stderr_buffer);
+ client_init_dispatch();
+
/* Set signal handlers to restore non-blocking mode. */
signal(SIGINT, signal_handler);
signal(SIGQUIT, signal_handler);
if (have_pty)
enter_raw_mode();
- /* Check if we should immediately send of on stdin. */
- client_check_initial_eof_on_stdin();
+ if (compat20) {
+ session_ident = ssh2_chan_id;
+ if (escape_char != SSH_ESCAPECHAR_NONE)
+ channel_register_filter(session_ident,
+ simple_escape_filter);
+ if (session_ident != -1)
+ channel_register_cleanup(session_ident,
+ client_channel_closed);
+ } else {
+ /* Check if we should immediately send eof on stdin. */
+ client_check_initial_eof_on_stdin();
+ }
/* Main loop of the client for the interactive session mode. */
while (!quit_pending) {
- fd_set readset, writeset;
/* Process buffered packets sent by the server. */
client_process_buffered_input_packets();
- /*
- * Make packets of buffered stdin data, and buffer them for
- * sending to the server.
- */
- client_make_packets_from_stdin_data();
+ if (compat20 && session_closed && !channel_still_open())
+ break;
- /*
- * Make packets from buffered channel data, and buffer them
- * for sending to the server.
- */
- if (packet_not_very_much_data_to_write())
- channel_output_poll();
+ rekeying = (xxx_kex != NULL && !xxx_kex->done);
- /*
- * Check if the window size has changed, and buffer a message
- * about it to the server if so.
- */
- client_check_window_change();
+ 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();
- if (quit_pending)
- break;
+ /*
+ * 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();
+
+ /*
+ * Check if the window size has changed, and buffer a
+ * message about it to the server if so.
+ */
+ client_check_window_change();
+ if (quit_pending)
+ break;
+ }
/*
* Wait until we have something to do (something becomes
* available on one of the descriptors).
*/
- client_wait_until_can_do_something(&readset, &writeset);
+ client_wait_until_can_do_something(&readset, &writeset,
+ &max_fd, rekeying);
if (quit_pending)
break;
- /* Do channel operations. */
- channel_after_select(&readset, &writeset);
+ /* Do channel operations unless rekeying in progress. */
+ if (!rekeying) {
+ channel_after_select(readset, writeset);
- /*
- * Process input from the connection and from stdin. Buffer
- * any data that is available.
- */
- client_process_input(&readset);
+ if (need_rekeying) {
+ debug("user requests rekeying");
+ xxx_kex->done = 0;
+ kex_send_kexinit(xxx_kex);
+ need_rekeying = 0;
+ }
+ }
- /*
- * Process output to stdout and stderr. Output to the
- * connection is processed elsewhere (above).
- */
- client_process_output(&writeset);
+ /* Buffer input from the connection. */
+ client_process_net_input(readset);
+
+ if (quit_pending)
+ break;
+
+ if (!compat20) {
+ /* Buffer data from stdin */
+ client_process_input(readset);
+ /*
+ * Process output to stdout and stderr. Output to
+ * the connection is processed elsewhere (above).
+ */
+ client_process_output(writeset);
+ }
/* 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();
}
+ if (readset)
+ xfree(readset);
+ if (writeset)
+ xfree(writeset);
/* Terminate the session. */
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));
- stderr_bytes += strlen(buf);
}
+
+ /* 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));
+
/* Output any buffered data for stdout. */
while (buffer_len(&stdout_buffer) > 0) {
len = write(fileno(stdout), buffer_ptr(&stdout_buffer),
- buffer_len(&stdout_buffer));
+ buffer_len(&stdout_buffer));
if (len <= 0) {
error("Write failed flushing stdout buffer.");
break;
}
buffer_consume(&stdout_buffer, len);
+ stdout_bytes += len;
}
/* Output any buffered data for stderr. */
while (buffer_len(&stderr_buffer) > 0) {
len = write(fileno(stderr), buffer_ptr(&stderr_buffer),
- buffer_len(&stderr_buffer));
+ buffer_len(&stderr_buffer));
if (len <= 0) {
error("Write failed flushing stderr buffer.");
break;
}
buffer_consume(&stderr_buffer, len);
+ stderr_bytes += len;
}
if (have_pty)
debug("Exit status %d", exit_status);
return exit_status;
}
+
+/*********/
+
+void
+client_input_stdout_data(int type, int plen, void *ctxt)
+{
+ u_int data_len;
+ char *data = packet_get_string(&data_len);
+ packet_integrity_check(plen, 4 + data_len, type);
+ buffer_append(&stdout_buffer, data, data_len);
+ memset(data, 0, data_len);
+ xfree(data);
+}
+void
+client_input_stderr_data(int type, int plen, void *ctxt)
+{
+ u_int data_len;
+ char *data = packet_get_string(&data_len);
+ packet_integrity_check(plen, 4 + data_len, type);
+ buffer_append(&stderr_buffer, data, data_len);
+ memset(data, 0, data_len);
+ xfree(data);
+}
+void
+client_input_exit_status(int type, int plen, void *ctxt)
+{
+ packet_integrity_check(plen, 4, type);
+ exit_status = packet_get_int();
+ /* 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;
+}
+
+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;
+
+ /* 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) {
+ 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,
+ xstrdup(originator_address), 1);
+ if (c == NULL) {
+ error("client_request_forwarded_tcpip: channel_new failed");
+ close(sock);
+ }
+ 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;
+
+ 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);
+ xfree(originator);
+ sock = x11_connect_display();
+ if (sock < 0)
+ return NULL;
+ c = channel_new("x11",
+ SSH_CHANNEL_X11_OPEN, sock, sock, -1,
+ CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
+ xstrdup("x11"), 1);
+ if (c == NULL) {
+ error("client_request_x11: channel_new failed");
+ close(sock);
+ }
+ return c;
+}
+
+Channel*
+client_request_agent(const char *request_type, int rchan)
+{
+ Channel *c = NULL;
+ int sock;
+
+ 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)
+ return NULL;
+ c = 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);
+ if (c == NULL) {
+ error("client_request_agent: channel_new failed");
+ close(sock);
+ }
+ return c;
+}
+
+/* XXXX move to generic input handler */
+void
+client_input_channel_open(int type, int plen, void *ctxt)
+{
+ Channel *c = NULL;
+ char *ctype;
+ u_int len;
+ int rchan;
+ int rmaxpack;
+ int rwindow;
+
+ ctype = packet_get_string(&len);
+ rchan = packet_get_int();
+ rwindow = packet_get_int();
+ rmaxpack = packet_get_int();
+
+ debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
+ ctype, rchan, rwindow, rmaxpack);
+
+ 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);
+ }
+/* XXX duplicate : */
+ if (c != NULL) {
+ debug("confirm %s", ctype);
+ c->remote_id = rchan;
+ c->remote_window = rwindow;
+ c->remote_maxpacket = rmaxpack;
+ 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();
+ }
+ } else {
+ debug("failure %s", ctype);
+ packet_start(SSH2_MSG_CHANNEL_OPEN_FAILURE);
+ packet_put_int(rchan);
+ packet_put_int(SSH2_OPEN_ADMINISTRATIVELY_PROHIBITED);
+ if (!(datafellows & SSH_BUG_OPENFAILURE)) {
+ packet_put_cstring("open failed");
+ packet_put_cstring("");
+ }
+ packet_send();
+ }
+ 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
+client_init_dispatch_20(void)
+{
+ dispatch_init(&dispatch_protocol_error);
+ 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);
+ 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_FAILURE, &channel_input_open_failure);
+ dispatch_set(SSH2_MSG_CHANNEL_REQUEST, &client_input_channel_req);
+ dispatch_set(SSH2_MSG_CHANNEL_WINDOW_ADJUST, &channel_input_window_adjust);
+
+ /* rekeying */
+ dispatch_set(SSH2_MSG_KEXINIT, &kex_input_kexinit);
+}
+void
+client_init_dispatch_13(void)
+{
+ 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);
+
+ 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
+client_init_dispatch_15(void)
+{
+ client_init_dispatch_13();
+ dispatch_set(SSH_MSG_CHANNEL_CLOSE, &channel_input_ieof);
+ dispatch_set(SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, & channel_input_oclose);
+}
+void
+client_init_dispatch(void)
+{
+ if (compat20)
+ client_init_dispatch_20();
+ else if (compat13)
+ client_init_dispatch_13();
+ else
+ client_init_dispatch_15();
+}
andersk / openssh.git / blobdiff