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