guacamole-spice-protocol/protocols/ssh/src/ssh_handlers.c

319 lines
9.8 KiB
C

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is libguac-client-ssh.
*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* James Muehlner <dagger10k@users.sourceforge.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <sys/select.h>
#include <stdlib.h>
#include <string.h>
#include <libssh/libssh.h>
#include <cairo/cairo.h>
#include <pango/pangocairo.h>
#include <guacamole/socket.h>
#include <guacamole/protocol.h>
#include <guacamole/client.h>
#include "ssh_handlers.h"
#include "ssh_client.h"
#include "cursor.h"
int ssh_guac_client_handle_messages(guac_client* client) {
guac_socket* socket = client->socket;
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
char buffer[8192];
ssh_channel channels[2], out_channels[2];
struct timeval timeout;
fd_set fds;
int ssh_fd;
/* Channels to read */
channels[0] = client_data->term_channel;
channels[1] = NULL;
/* Get SSH file descriptor */
ssh_fd = ssh_get_fd(client_data->session);
/* Build fd_set */
FD_ZERO(&fds);
FD_SET(ssh_fd, &fds);
/* Time to wait */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
/* Wait for data to be available */
if (ssh_select(channels, out_channels, ssh_fd+1, &fds, &timeout)
== SSH_OK) {
int bytes_read = 0;
/* Lock terminal access */
pthread_mutex_lock(&(client_data->term->lock));
/* Clear cursor */
guac_terminal_toggle_reverse(client_data->term,
client_data->term->cursor_row,
client_data->term->cursor_col);
/* While data available, write to terminal */
while (channel_is_open(client_data->term_channel)
&& !channel_is_eof(client_data->term_channel)
&& (bytes_read = channel_read_nonblocking(client_data->term_channel, buffer, sizeof(buffer), 0)) > 0) {
if (guac_terminal_write(client_data->term, buffer, bytes_read)
|| guac_socket_flush(socket))
return 1;
}
/* Notify on error */
if (bytes_read < 0) {
guac_protocol_send_error(socket, "Error reading data.");
guac_socket_flush(socket);
return 1;
}
/* Draw cursor */
guac_terminal_toggle_reverse(client_data->term,
client_data->term->cursor_row,
client_data->term->cursor_col);
/* Flush terminal delta */
guac_terminal_delta_flush(client_data->term->delta);
/* Unlock terminal access */
pthread_mutex_unlock(&(client_data->term->lock));
}
return 0;
}
int ssh_guac_client_clipboard_handler(guac_client* client, char* data) {
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
free(client_data->clipboard_data);
client_data->clipboard_data = strdup(data);
return 0;
}
int ssh_guac_client_mouse_handler(guac_client* client, int x, int y, int mask) {
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
guac_terminal* term = client_data->term;
/* Determine which buttons were just released and pressed */
int released_mask = client_data->mouse_mask & ~mask;
int pressed_mask = ~client_data->mouse_mask & mask;
client_data->mouse_mask = mask;
/* Show mouse cursor if not already shown */
if (client_data->current_cursor != client_data->ibar_cursor) {
pthread_mutex_lock(&(term->lock));
client_data->current_cursor = client_data->ibar_cursor;
guac_ssh_set_cursor(client, client_data->ibar_cursor);
guac_socket_flush(client->socket);
pthread_mutex_unlock(&(term->lock));
}
/* Paste contents of clipboard on right mouse button up */
if ((released_mask & GUAC_CLIENT_MOUSE_RIGHT)
&& client_data->clipboard_data != NULL) {
int length = strlen(client_data->clipboard_data);
if (length)
return channel_write(client_data->term_channel,
client_data->clipboard_data, length);
}
/* If text selected, change state based on left mouse mouse button */
if (term->text_selected) {
pthread_mutex_lock(&(term->lock));
/* If mouse button released, stop selection */
if (released_mask & GUAC_CLIENT_MOUSE_LEFT)
guac_terminal_select_end(term);
/* Otherwise, just update */
else
guac_terminal_select_update(term,
y / term->delta->char_height - term->scroll_offset,
x / term->delta->char_width);
pthread_mutex_unlock(&(term->lock));
}
/* Otherwise, if mouse button pressed, start selection */
else if (pressed_mask & GUAC_CLIENT_MOUSE_LEFT) {
pthread_mutex_lock(&(term->lock));
guac_terminal_select_start(term,
y / term->delta->char_height - term->scroll_offset,
x / term->delta->char_width);
pthread_mutex_unlock(&(term->lock));
}
/* Scroll up if wheel moved up */
if (released_mask & GUAC_CLIENT_MOUSE_SCROLL_UP) {
pthread_mutex_lock(&(term->lock));
guac_terminal_scroll_display_up(term, GUAC_SSH_WHEEL_SCROLL_AMOUNT);
pthread_mutex_unlock(&(term->lock));
}
/* Scroll down if wheel moved down */
if (released_mask & GUAC_CLIENT_MOUSE_SCROLL_DOWN) {
pthread_mutex_lock(&(term->lock));
guac_terminal_scroll_display_down(term, GUAC_SSH_WHEEL_SCROLL_AMOUNT);
pthread_mutex_unlock(&(term->lock));
}
return 0;
}
int ssh_guac_client_key_handler(guac_client* client, int keysym, int pressed) {
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
guac_terminal* term = client_data->term;
/* Hide mouse cursor if not already hidden */
if (client_data->current_cursor != client_data->blank_cursor) {
pthread_mutex_lock(&(term->lock));
client_data->current_cursor = client_data->blank_cursor;
guac_ssh_set_cursor(client, client_data->blank_cursor);
guac_socket_flush(client->socket);
pthread_mutex_unlock(&(term->lock));
}
/* Track modifiers */
if (keysym == 0xFFE3) {
client_data->mod_ctrl = pressed;
}
/* If key pressed */
else if (pressed) {
/* Reset scroll */
if (term->scroll_offset != 0) {
pthread_mutex_lock(&(term->lock));
guac_terminal_scroll_display_down(term, term->scroll_offset);
pthread_mutex_unlock(&(term->lock));
}
/* If simple ASCII key */
if (keysym >= 0x00 && keysym <= 0xFF) {
char data = (char) keysym;
/* Handle Ctrl modifier */
if (client_data->mod_ctrl) {
if (keysym >= 'A' && keysym <= 'Z')
data = (char) (keysym - 'A' + 1);
else if (keysym >= 'a' && keysym <= 'z')
data = (char) (keysym - 'a' + 1);
}
return channel_write(client_data->term_channel, &data, 1);
}
else {
int length = 0;
const char* data = NULL;
if (keysym == 0xFF08) { data = "\x08"; length = 1; }
else if (keysym == 0xFF09) { data = "\x09"; length = 1; }
else if (keysym == 0xFF0D) { data = "\x0D"; length = 1; }
else if (keysym == 0xFF1B) { data = "\x1B"; length = 1; }
/* Arrow keys */
else if (keysym == 0xFF52) { data = "\x1B\x5B""A"; length = 3; }
else if (keysym == 0xFF54) { data = "\x1B\x5B""B"; length = 3; }
else if (keysym == 0xFF53) { data = "\x1B\x5B""C"; length = 3; }
else if (keysym == 0xFF51) { data = "\x1B\x5B""D"; length = 3; }
/* Ignore other keys */
else return 0;
return channel_write(client_data->term_channel, data, length);
}
}
return 0;
}
int ssh_guac_client_free_handler(guac_client* client) {
ssh_guac_client_data* guac_client_data = (ssh_guac_client_data*) client->data;
/* Free terminal */
guac_terminal_free(guac_client_data->term);
/* Free clipboard data */
free(guac_client_data->clipboard_data);
/* Free cursors */
guac_ssh_cursor_free(client, guac_client_data->ibar_cursor);
guac_ssh_cursor_free(client, guac_client_data->blank_cursor);
/* Free generic data struct */
free(client->data);
return 0;
}