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Merge pull request #116 from glyptodon/fake-merge-screen-sharing-005-vnc

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GUAC-1389: Add screen sharing support to VNC.
This commit is contained in:
James Muehlner 2016-03-04 01:02:17 -08:00
commit 6da0c0e0b4
28 changed files with 2391 additions and 1296 deletions
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2
Makefile.am
View File

@ -62,7 +62,7 @@ if ENABLE_TELNET
endif
if ENABLE_VNC
#SUBDIRS += src/protocols/vnc
SUBDIRS += src/protocols/vnc
endif
EXTRA_DIST = \

20
src/protocols/vnc/Makefile.am
View File

@ -26,16 +26,28 @@ ACLOCAL_AMFLAGS = -I m4
lib_LTLIBRARIES = libguac-client-vnc.la
libguac_client_vnc_la_SOURCES = \
auth.c \
client.c \
clipboard.c \
guac_handlers.c \
vnc_handlers.c
cursor.c \
display.c \
input.c \
log.c \
settings.c \
user.c \
vnc.c
noinst_HEADERS = \
auth.h \
client.h \
clipboard.h \
guac_handlers.h \
vnc_handlers.h
cursor.h \
display.h \
input.h \
log.h \
settings.h \
user.h \
vnc.h
# Optional PulseAudio support
if ENABLE_PULSE

36
src/protocols/vnc/auth.c Normal file
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@ -0,0 +1,36 @@
/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "auth.h"
#include "vnc.h"
#include <guacamole/client.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
char* guac_vnc_get_password(rfbClient* client) {
guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
return ((guac_vnc_client*) gc->data)->settings->password;
}

27
src/protocols/vnc/vnc_handlers.h → src/protocols/vnc/auth.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2013 Glyptodon LLC
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@ -20,23 +20,26 @@
* THE SOFTWARE.
*/
#ifndef __GUAC_VNC_VNC_HANDLERS_H
#define __GUAC_VNC_VNC_HANDLERS_H
#ifndef GUAC_VNC_AUTH_H
#define GUAC_VNC_AUTH_H
#include "config.h"
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
void guac_vnc_cursor(rfbClient* client, int x, int y, int w, int h, int bpp);
void guac_vnc_update(rfbClient* client, int x, int y, int w, int h);
void guac_vnc_copyrect(rfbClient* client, int src_x, int src_y, int w, int h, int dest_x, int dest_y);
/**
* Callback which is invoked by libVNCServer when it needs to read the user's
* VNC password. As ths user's password, if any, will be stored in the
* connection settings, this function does nothing more than return that value.
*
* @param client
* The rfbClient associated with the VNC connection requiring the password.
*
* @return
* The password to provide to the VNC server.
*/
char* guac_vnc_get_password(rfbClient* client);
rfbBool guac_vnc_malloc_framebuffer(rfbClient* rfb_client);
void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen);
void guac_vnc_client_log_info(const char* format, ...);
void guac_vnc_client_log_error(const char* format, ...);
void guac_vnc_set_pixel_format(rfbClient* client, int color_depth);
#endif

597
src/protocols/vnc/client.c
View File

@ -23,16 +23,8 @@
#include "config.h"
#include "client.h"
#include "clipboard.h"
#include "guac_clipboard.h"
#include "guac_dot_cursor.h"
#include "guac_handlers.h"
#include "guac_pointer_cursor.h"
#include "vnc_handlers.h"
#ifdef ENABLE_PULSE
#include "pulse.h"
#endif
#include "user.h"
#include "vnc.h"
#ifdef ENABLE_COMMON_SSH
#include "guac_sftp.h"
@ -40,522 +32,103 @@
#include "sftp.h"
#endif
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
#ifdef ENABLE_PULSE
#include "pulse.h"
#endif
#include <guacamole/client.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
/* Client plugin arguments */
const char* GUAC_CLIENT_ARGS[] = {
"hostname",
"port",
"read-only",
"encodings",
"password",
"swap-red-blue",
"color-depth",
"cursor",
"autoretry",
"clipboard-encoding",
int guac_client_init(guac_client* client) {
#ifdef ENABLE_VNC_REPEATER
"dest-host",
"dest-port",
#endif
#ifdef ENABLE_PULSE
"enable-audio",
"audio-servername",
#endif
#ifdef ENABLE_VNC_LISTEN
"reverse-connect",
"listen-timeout",
#endif
#ifdef ENABLE_COMMON_SSH
"enable-sftp",
"sftp-hostname",
"sftp-port",
"sftp-username",
"sftp-password",
"sftp-private-key",
"sftp-passphrase",
"sftp-directory",
#endif
NULL
};
enum VNC_ARGS_IDX {
IDX_HOSTNAME,
IDX_PORT,
IDX_READ_ONLY,
IDX_ENCODINGS,
IDX_PASSWORD,
IDX_SWAP_RED_BLUE,
IDX_COLOR_DEPTH,
IDX_CURSOR,
IDX_AUTORETRY,
IDX_CLIPBOARD_ENCODING,
#ifdef ENABLE_VNC_REPEATER
IDX_DEST_HOST,
IDX_DEST_PORT,
#endif
#ifdef ENABLE_PULSE
IDX_ENABLE_AUDIO,
IDX_AUDIO_SERVERNAME,
#endif
#ifdef ENABLE_VNC_LISTEN
IDX_REVERSE_CONNECT,
IDX_LISTEN_TIMEOUT,
#endif
#ifdef ENABLE_COMMON_SSH
IDX_ENABLE_SFTP,
IDX_SFTP_HOSTNAME,
IDX_SFTP_PORT,
IDX_SFTP_USERNAME,
IDX_SFTP_PASSWORD,
IDX_SFTP_PRIVATE_KEY,
IDX_SFTP_PASSPHRASE,
IDX_SFTP_DIRECTORY,
#endif
VNC_ARGS_COUNT
};
char* __GUAC_CLIENT = "GUAC_CLIENT";
/**
* Allocates a new rfbClient instance given the parameters stored within the
* client, returning NULL on failure.
*/
static rfbClient* __guac_vnc_get_client(guac_client* client) {
rfbClient* rfb_client = rfbGetClient(8, 3, 4); /* 32-bpp client */
vnc_guac_client_data* guac_client_data =
(vnc_guac_client_data*) client->data;
/* Store Guac client in rfb client */
rfbClientSetClientData(rfb_client, __GUAC_CLIENT, client);
/* Framebuffer update handler */
rfb_client->GotFrameBufferUpdate = guac_vnc_update;
rfb_client->GotCopyRect = guac_vnc_copyrect;
/* Do not handle clipboard and local cursor if read-only */
if (guac_client_data->read_only == 0) {
/* Clipboard */
rfb_client->GotXCutText = guac_vnc_cut_text;
/* Set remote cursor */
if (guac_client_data->remote_cursor)
rfb_client->appData.useRemoteCursor = FALSE;
else {
/* Enable client-side cursor */
rfb_client->appData.useRemoteCursor = TRUE;
rfb_client->GotCursorShape = guac_vnc_cursor;
}
}
/* Password */
rfb_client->GetPassword = guac_vnc_get_password;
/* Depth */
guac_vnc_set_pixel_format(rfb_client, guac_client_data->color_depth);
/* Hook into allocation so we can handle resize. */
guac_client_data->rfb_MallocFrameBuffer = rfb_client->MallocFrameBuffer;
rfb_client->MallocFrameBuffer = guac_vnc_malloc_framebuffer;
rfb_client->canHandleNewFBSize = 1;
/* Set hostname and port */
rfb_client->serverHost = strdup(guac_client_data->hostname);
rfb_client->serverPort = guac_client_data->port;
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
if (guac_client_data->dest_host) {
rfb_client->destHost = strdup(guac_client_data->dest_host);
rfb_client->destPort = guac_client_data->dest_port;
}
#endif
#ifdef ENABLE_VNC_LISTEN
/* If reverse connection enabled, start listening */
if (guac_client_data->reverse_connect) {
guac_client_log(client, GUAC_LOG_INFO, "Listening for connections on port %i",
guac_client_data->port);
/* Listen for connection from server */
rfb_client->listenPort = guac_client_data->port;
if (listenForIncomingConnectionsNoFork(rfb_client,
guac_client_data->listen_timeout*1000) <= 0)
return NULL;
}
#endif
/* Set encodings if provided */
if (guac_client_data->encodings)
rfb_client->appData.encodingsString =
strdup(guac_client_data->encodings);
/* Connect */
if (rfbInitClient(rfb_client, NULL, NULL))
return rfb_client;
/* If connection fails, return NULL */
return NULL;
}
/**
* Sets the encoding of clipboard data exchanged with the VNC server to the
* encoding having the given name. If the name is left blank, or is invalid,
* the standard ISO8859-1 encoding will be used.
*
* @param client
* The client to set the clipboard encoding of.
*
* @param name
* The name of the encoding to use for all clipboard data. Valid values
* are: "ISO8859-1", "UTF-8", "UTF-16", "CP1252", or "".
*
* @return
* Zero if the chosen encoding is standard for VNC, or non-zero if the VNC
* standard is being violated.
*/
static int guac_vnc_set_clipboard_encoding(guac_client* client,
const char* name) {
vnc_guac_client_data* guac_client_data =
(vnc_guac_client_data*) client->data;
/* Use ISO8859-1 if explicitly selected or blank */
if (name[0] == '\0' || strcmp(name, "ISO8859-1") == 0) {
guac_client_data->clipboard_reader = GUAC_READ_ISO8859_1;
guac_client_data->clipboard_writer = GUAC_WRITE_ISO8859_1;
return 0;
}
/* UTF-8 */
if (strcmp(name, "UTF-8") == 0) {
guac_client_data->clipboard_reader = GUAC_READ_UTF8;
guac_client_data->clipboard_writer = GUAC_WRITE_UTF8;
return 1;
}
/* UTF-16 */
if (strcmp(name, "UTF-16") == 0) {
guac_client_data->clipboard_reader = GUAC_READ_UTF16;
guac_client_data->clipboard_writer = GUAC_WRITE_UTF16;
return 1;
}
/* CP1252 */
if (strcmp(name, "CP1252") == 0) {
guac_client_data->clipboard_reader = GUAC_READ_CP1252;
guac_client_data->clipboard_writer = GUAC_WRITE_CP1252;
return 1;
}
/* If encoding unrecognized, warn and default to ISO8859-1 */
guac_client_log(client, GUAC_LOG_WARNING,
"Encoding '%s' is invalid. Defaulting to ISO8859-1.", name);
guac_client_data->clipboard_reader = GUAC_READ_ISO8859_1;
guac_client_data->clipboard_writer = GUAC_WRITE_ISO8859_1;
return 0;
}
int guac_client_init(guac_client* client, int argc, char** argv) {
rfbClient* rfb_client;
vnc_guac_client_data* guac_client_data;
int retries_remaining;
/* Set up libvncclient logging */
rfbClientLog = guac_vnc_client_log_info;
rfbClientErr = guac_vnc_client_log_error;
/*** PARSE ARGUMENTS ***/
if (argc != VNC_ARGS_COUNT) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Wrong argument count received.");
return 1;
}
/* Set client args */
client->args = GUAC_VNC_CLIENT_ARGS;
/* Alloc client data */
guac_client_data = malloc(sizeof(vnc_guac_client_data));
client->data = guac_client_data;
guac_client_data->hostname = strdup(argv[IDX_HOSTNAME]);
guac_client_data->port = atoi(argv[IDX_PORT]);
guac_client_data->password = strdup(argv[IDX_PASSWORD]); /* NOTE: freed by libvncclient */
guac_client_data->default_surface = NULL;
/* Set flags */
guac_client_data->remote_cursor = (strcmp(argv[IDX_CURSOR], "remote") == 0);
guac_client_data->swap_red_blue = (strcmp(argv[IDX_SWAP_RED_BLUE], "true") == 0);
guac_client_data->read_only = (strcmp(argv[IDX_READ_ONLY], "true") == 0);
/* Parse color depth */
guac_client_data->color_depth = atoi(argv[IDX_COLOR_DEPTH]);
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
if (argv[IDX_DEST_HOST][0] != '\0')
guac_client_data->dest_host = strdup(argv[IDX_DEST_HOST]);
else
guac_client_data->dest_host = NULL;
if (argv[IDX_DEST_PORT][0] != '\0')
guac_client_data->dest_port = atoi(argv[IDX_DEST_PORT]);
#endif
/* Set encodings if specified */
if (argv[IDX_ENCODINGS][0] != '\0')
guac_client_data->encodings = strdup(argv[IDX_ENCODINGS]);
else
guac_client_data->encodings = NULL;
/* Parse autoretry */
if (argv[IDX_AUTORETRY][0] != '\0')
retries_remaining = atoi(argv[IDX_AUTORETRY]);
else
retries_remaining = 0;
#ifdef ENABLE_VNC_LISTEN
/* Set reverse-connection flag */
guac_client_data->reverse_connect =
(strcmp(argv[IDX_REVERSE_CONNECT], "true") == 0);
/* Parse listen timeout */
if (argv[IDX_LISTEN_TIMEOUT][0] != '\0')
guac_client_data->listen_timeout = atoi(argv[IDX_LISTEN_TIMEOUT]);
else
guac_client_data->listen_timeout = 5000;
#endif
guac_vnc_client* vnc_client = calloc(1, sizeof(guac_vnc_client));
client->data = vnc_client;
/* Init clipboard */
guac_client_data->clipboard = guac_common_clipboard_alloc(GUAC_VNC_CLIPBOARD_MAX_LENGTH);
/* Configure clipboard encoding */
if (guac_vnc_set_clipboard_encoding(client, argv[IDX_CLIPBOARD_ENCODING]))
guac_client_log(client, GUAC_LOG_INFO,
"Using non-standard VNC clipboard encoding: '%s'.",
argv[IDX_CLIPBOARD_ENCODING]);
/* Ensure connection is kept alive during lengthy connects */
guac_socket_require_keep_alive(client->socket);
/* Attempt connection */
rfb_client = __guac_vnc_get_client(client);
/* If unsuccessful, retry as many times as specified */
while (!rfb_client && retries_remaining > 0) {
struct timespec guac_vnc_connect_interval = {
.tv_sec = GUAC_VNC_CONNECT_INTERVAL/1000,
.tv_nsec = (GUAC_VNC_CONNECT_INTERVAL%1000)*1000000
};
guac_client_log(client, GUAC_LOG_INFO,
"Connect failed. Waiting %ims before retrying...",
GUAC_VNC_CONNECT_INTERVAL);
/* Wait for given interval then retry */
nanosleep(&guac_vnc_connect_interval, NULL);
rfb_client = __guac_vnc_get_client(client);
retries_remaining--;
}
/* If the final connect attempt fails, return error */
if (!rfb_client) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Unable to connect to VNC server.");
return 1;
}
#ifdef ENABLE_PULSE
guac_client_data->audio_enabled =
(strcmp(argv[IDX_ENABLE_AUDIO], "true") == 0);
/* If an encoding is available, load an audio stream */
if (guac_client_data->audio_enabled) {
guac_client_data->audio = guac_audio_stream_alloc(client, NULL,
GUAC_VNC_AUDIO_RATE,
GUAC_VNC_AUDIO_CHANNELS,
GUAC_VNC_AUDIO_BPS);
/* Load servername if specified */
if (argv[IDX_AUDIO_SERVERNAME][0] != '\0')
guac_client_data->pa_servername =
strdup(argv[IDX_AUDIO_SERVERNAME]);
else
guac_client_data->pa_servername = NULL;
/* If successful, init audio system */
if (guac_client_data->audio != NULL) {
guac_client_log(client, GUAC_LOG_INFO,
"Audio will be encoded as %s",
guac_client_data->audio->encoder->mimetype);
/* Require threadsafe sockets if audio enabled */
guac_socket_require_threadsafe(client->socket);
/* Start audio stream */
guac_pa_start_stream(client);
}
/* Otherwise, audio loading failed */
else
guac_client_log(client, GUAC_LOG_INFO,
"No available audio encoding. Sound disabled.");
} /* end if audio enabled */
#endif
#ifdef ENABLE_COMMON_SSH
guac_common_ssh_init(client);
/* Connect via SSH if SFTP is enabled */
if (strcmp(argv[IDX_ENABLE_SFTP], "true") == 0) {
guac_client_log(client, GUAC_LOG_DEBUG,
"Connecting via SSH for SFTP filesystem access.");
guac_client_data->sftp_user =
guac_common_ssh_create_user(argv[IDX_SFTP_USERNAME]);
/* Import private key, if given */
if (argv[IDX_SFTP_PRIVATE_KEY][0] != '\0') {
guac_client_log(client, GUAC_LOG_DEBUG,
"Authenticating with private key.");
/* Abort if private key cannot be read */
if (guac_common_ssh_user_import_key(guac_client_data->sftp_user,
argv[IDX_SFTP_PRIVATE_KEY],
argv[IDX_SFTP_PASSPHRASE])) {
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
return 1;
}
}
/* Otherwise, use specified password */
else {
guac_client_log(client, GUAC_LOG_DEBUG,
"Authenticating with password.");
guac_common_ssh_user_set_password(guac_client_data->sftp_user,
argv[IDX_SFTP_PASSWORD]);
}
/* Parse hostname - use VNC hostname by default */
const char* sftp_hostname = argv[IDX_SFTP_HOSTNAME];
if (sftp_hostname[0] == '\0')
sftp_hostname = guac_client_data->hostname;
/* Parse port, defaulting to standard SSH port */
const char* sftp_port = argv[IDX_SFTP_PORT];
if (sftp_port[0] == '\0')
sftp_port = "22";
/* Attempt SSH connection */
guac_client_data->sftp_session =
guac_common_ssh_create_session(client, sftp_hostname, sftp_port,
guac_client_data->sftp_user);
/* Fail if SSH connection does not succeed */
if (guac_client_data->sftp_session == NULL) {
/* Already aborted within guac_common_ssh_create_session() */
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
return 1;
}
/* Load and expose filesystem */
guac_client_data->sftp_filesystem =
guac_common_ssh_create_sftp_filesystem(
guac_client_data->sftp_session, "/");
/* Abort if SFTP connection fails */
if (guac_client_data->sftp_filesystem == NULL) {
guac_common_ssh_destroy_session(guac_client_data->sftp_session);
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
return 1;
}
/* Configure destination for basic uploads, if specified */
if (argv[IDX_SFTP_DIRECTORY][0] != '\0')
guac_common_ssh_sftp_set_upload_path(
guac_client_data->sftp_filesystem,
argv[IDX_SFTP_DIRECTORY]);
/* Set file handler for basic uploads */
client->file_handler = guac_vnc_sftp_file_handler;
guac_client_log(client, GUAC_LOG_DEBUG,
"SFTP connection succeeded.");
}
#endif
/* Set remaining client data */
guac_client_data->rfb_client = rfb_client;
guac_client_data->copy_rect_used = 0;
guac_client_data->cursor = guac_client_alloc_buffer(client);
vnc_client->clipboard = guac_common_clipboard_alloc(GUAC_VNC_CLIPBOARD_MAX_LENGTH);
/* Set handlers */
client->handle_messages = vnc_guac_client_handle_messages;
client->free_handler = vnc_guac_client_free_handler;
client->join_handler = guac_vnc_user_join_handler;
client->free_handler = guac_vnc_client_free_handler;
/* If not read-only, set input handlers and pointer */
if (guac_client_data->read_only == 0) {
/* Only handle mouse/keyboard/clipboard if not read-only */
client->mouse_handler = vnc_guac_client_mouse_handler;
client->key_handler = vnc_guac_client_key_handler;
client->clipboard_handler = guac_vnc_clipboard_handler;
/* If not read-only but cursor is remote, set a dot cursor */
if (guac_client_data->remote_cursor)
guac_common_set_dot_cursor(client);
/* Otherwise, set pointer until explicitly requested otherwise */
else
guac_common_set_pointer_cursor(client);
}
/* Send name */
guac_protocol_send_name(client->socket, rfb_client->desktopName);
/* Create default surface */
guac_client_data->default_surface = guac_common_surface_alloc(client,
client->socket, GUAC_DEFAULT_LAYER,
rfb_client->width, rfb_client->height);
return 0;
}
int guac_vnc_client_free_handler(guac_client* client) {
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
guac_vnc_settings* settings = vnc_client->settings;
/* Clean up VNC client*/
rfbClient* rfb_client = vnc_client->rfb_client;
if (rfb_client != NULL) {
/* Wait for client thread to finish */
pthread_join(vnc_client->client_thread, NULL);
/* Free memory not free'd by libvncclient's rfbClientCleanup() */
if (rfb_client->frameBuffer != NULL) free(rfb_client->frameBuffer);
if (rfb_client->raw_buffer != NULL) free(rfb_client->raw_buffer);
if (rfb_client->rcSource != NULL) free(rfb_client->rcSource);
/* Free VNC rfbClientData linked list (not free'd by rfbClientCleanup()) */
while (rfb_client->clientData != NULL) {
rfbClientData* next = rfb_client->clientData->next;
free(rfb_client->clientData);
rfb_client->clientData = next;
}
rfbClientCleanup(rfb_client);
}
#ifdef ENABLE_COMMON_SSH
/* Free SFTP filesystem, if loaded */
if (vnc_client->sftp_filesystem)
guac_common_ssh_destroy_sftp_filesystem(vnc_client->sftp_filesystem);
/* Free SFTP session */
if (vnc_client->sftp_session)
guac_common_ssh_destroy_session(vnc_client->sftp_session);
/* Free SFTP user */
if (vnc_client->sftp_user)
guac_common_ssh_destroy_user(vnc_client->sftp_user);
guac_common_ssh_uninit();
#endif
/* Free clipboard */
if (vnc_client->clipboard != NULL)
guac_common_clipboard_free(vnc_client->clipboard);
/* Free display */
if (vnc_client->display != NULL)
guac_common_display_free(vnc_client->display);
/* Free settings-dependend data */
if (settings != NULL) {
#ifdef ENABLE_PULSE
/* If audio enabled, stop streaming */
if (settings->audio_enabled)
guac_pa_stop_stream(client);
#endif
/* Free parsed settings */
guac_vnc_settings_free(settings);
}
/* Free generic data struct */
free(client->data);
return 0;
}

184
src/protocols/vnc/client.h
View File

@ -24,24 +24,7 @@
#ifndef __GUAC_VNC_CLIENT_H
#define __GUAC_VNC_CLIENT_H
#include "config.h"
#include "guac_clipboard.h"
#include "guac_surface.h"
#include "guac_iconv.h"
#include <guacamole/audio.h>
#include <guacamole/layer.h>
#include <rfb/rfbclient.h>
#ifdef ENABLE_PULSE
#include <pulse/pulseaudio.h>
#endif
#ifdef ENABLE_COMMON_SSH
#include "guac_sftp.h"
#include "guac_ssh.h"
#include "guac_ssh_user.h"
#endif
#include <guacamole/client.h>
/**
* The maximum duration of a frame in milliseconds.
@ -55,6 +38,15 @@
*/
#define GUAC_VNC_FRAME_TIMEOUT 10
/**
* The amount of time to wait for a new message from the VNC server when
* beginning a new frame. This value must be kept reasonably small such that
* a slow VNC server will not prevent external events from being handled (such
* as the stop signal from guac_client_stop()), but large enough that the
* message handling loop does not eat up CPU spinning.
*/
#define GUAC_VNC_FRAME_START_TIMEOUT 1000000
/**
* The number of milliseconds to wait between connection attempts.
*/
@ -65,162 +57,10 @@
*/
#define GUAC_VNC_CLIPBOARD_MAX_LENGTH 262144
extern char* __GUAC_CLIENT;
/**
* VNC-specific client data.
* Handler which frees all data associated with the guac_client.
*/
typedef struct vnc_guac_client_data {
/**
* The underlying VNC client.
*/
rfbClient* rfb_client;
/**
* The original framebuffer malloc procedure provided by the initialized
* rfbClient.
*/
MallocFrameBufferProc rfb_MallocFrameBuffer;
/**
* Whether copyrect was used to produce the latest update received
* by the VNC server.
*/
int copy_rect_used;
/**
* The hostname of the VNC server (or repeater) to connect to.
*/
char* hostname;
/**
* The port of the VNC server (or repeater) to connect to.
*/
int port;
/**
* The password given in the arguments.
*/
char* password;
/**
* Space-separated list of encodings to use within the VNC session.
*/
char* encodings;
/**
* Whether the red and blue components of each color should be swapped.
* This is mainly used for VNC servers that do not properly handle
* colors.
*/
int swap_red_blue;
/**
* The color depth to request, in bits.
*/
int color_depth;
/**
* Whether this connection is read-only, and user input should be dropped.
*/
int read_only;
/**
* The VNC host to connect to, if using a repeater.
*/
char* dest_host;
/**
* The VNC port to connect to, if using a repeater.
*/
int dest_port;
#ifdef ENABLE_VNC_LISTEN
/**
* Whether not actually connecting to a VNC server, but rather listening
* for a connection from the VNC server (reverse connection).
*/
int reverse_connect;
/**
* The maximum amount of time to wait when listening for connections, in
* milliseconds.
*/
int listen_timeout;
#endif
/**
* Whether the cursor should be rendered on the server (remote) or on the
* client (local).
*/
int remote_cursor;
/**
* The layer holding the cursor image.
*/
guac_layer* cursor;
/**
* Whether audio is enabled.
*/
int audio_enabled;
/**
* Audio output, if any.
*/
guac_audio_stream* audio;
#ifdef ENABLE_PULSE
/**
* The name of the PulseAudio server to connect to.
*/
char* pa_servername;
/**
* PulseAudio event loop.
*/
pa_threaded_mainloop* pa_mainloop;
#endif
/**
* Internal clipboard.
*/
guac_common_clipboard* clipboard;
/**
* Default surface.
*/
guac_common_surface* default_surface;
#ifdef ENABLE_COMMON_SSH
/**
* The user and credentials used to authenticate for SFTP.
*/
guac_common_ssh_user* sftp_user;
/**
* The SSH session used for SFTP.
*/
guac_common_ssh_session* sftp_session;
/**
* The exposed filesystem object, implemented with SFTP.
*/
guac_object* sftp_filesystem;
#endif
/**
* Clipboard encoding-specific reader.
*/
guac_iconv_read* clipboard_reader;
/**
* Clipboard encoding-specific writer.
*/
guac_iconv_write* clipboard_writer;
} vnc_guac_client_data;
guac_client_free_handler guac_vnc_client_free_handler;
#endif

93
src/protocols/vnc/clipboard.c
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@ -25,17 +25,64 @@
#include "clipboard.h"
#include "guac_clipboard.h"
#include "guac_iconv.h"
#include "user.h"
#include "vnc.h"
#include <guacamole/client.h>
#include <guacamole/stream.h>
#include <guacamole/user.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
int guac_vnc_clipboard_handler(guac_client* client, guac_stream* stream,
int guac_vnc_set_clipboard_encoding(guac_client* client,
const char* name) {
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
/* Use ISO8859-1 if explicitly selected or NULL */
if (name == NULL || strcmp(name, "ISO8859-1") == 0) {
vnc_client->clipboard_reader = GUAC_READ_ISO8859_1;
vnc_client->clipboard_writer = GUAC_WRITE_ISO8859_1;
return 0;
}
/* UTF-8 */
if (strcmp(name, "UTF-8") == 0) {
vnc_client->clipboard_reader = GUAC_READ_UTF8;
vnc_client->clipboard_writer = GUAC_WRITE_UTF8;
return 1;
}
/* UTF-16 */
if (strcmp(name, "UTF-16") == 0) {
vnc_client->clipboard_reader = GUAC_READ_UTF16;
vnc_client->clipboard_writer = GUAC_WRITE_UTF16;
return 1;
}
/* CP1252 */
if (strcmp(name, "CP1252") == 0) {
vnc_client->clipboard_reader = GUAC_READ_CP1252;
vnc_client->clipboard_writer = GUAC_WRITE_CP1252;
return 1;
}
/* If encoding unrecognized, warn and default to ISO8859-1 */
guac_client_log(client, GUAC_LOG_WARNING,
"Encoding '%s' is invalid. Defaulting to ISO8859-1.", name);
vnc_client->clipboard_reader = GUAC_READ_ISO8859_1;
vnc_client->clipboard_writer = GUAC_WRITE_ISO8859_1;
return 0;
}
int guac_vnc_clipboard_handler(guac_user* user, guac_stream* stream,
char* mimetype) {
/* Clear clipboard and prepare for new data */
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_common_clipboard_reset(client_data->clipboard, mimetype);
guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
guac_common_clipboard_reset(vnc_client->clipboard, mimetype);
/* Set handlers for clipboard stream */
stream->blob_handler = guac_vnc_clipboard_blob_handler;
@ -44,29 +91,29 @@ int guac_vnc_clipboard_handler(guac_client* client, guac_stream* stream,
return 0;
}
int guac_vnc_clipboard_blob_handler(guac_client* client, guac_stream* stream,
int guac_vnc_clipboard_blob_handler(guac_user* user, guac_stream* stream,
void* data, int length) {
/* Append new data */
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_common_clipboard_append(client_data->clipboard, (char*) data, length);
guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
guac_common_clipboard_append(vnc_client->clipboard, (char*) data, length);
return 0;
}
int guac_vnc_clipboard_end_handler(guac_client* client, guac_stream* stream) {
int guac_vnc_clipboard_end_handler(guac_user* user, guac_stream* stream) {
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
rfbClient* rfb_client = client_data->rfb_client;
guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
rfbClient* rfb_client = vnc_client->rfb_client;
char output_data[GUAC_VNC_CLIPBOARD_MAX_LENGTH];
const char* input = client_data->clipboard->buffer;
const char* input = vnc_client->clipboard->buffer;
char* output = output_data;
guac_iconv_write* writer = client_data->clipboard_writer;
guac_iconv_write* writer = vnc_client->clipboard_writer;
/* Convert clipboard contents */
guac_iconv(GUAC_READ_UTF8, &input, client_data->clipboard->length,
guac_iconv(GUAC_READ_UTF8, &input, vnc_client->clipboard->length,
writer, &output, sizeof(output_data));
/* Send via VNC */
@ -75,3 +122,25 @@ int guac_vnc_clipboard_end_handler(guac_client* client, guac_stream* stream) {
return 0;
}
void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen) {
guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
char received_data[GUAC_VNC_CLIPBOARD_MAX_LENGTH];
const char* input = text;
char* output = received_data;
guac_iconv_read* reader = vnc_client->clipboard_reader;
/* Convert clipboard contents */
guac_iconv(reader, &input, textlen,
GUAC_WRITE_UTF8, &output, sizeof(received_data));
/* Send converted data */
guac_common_clipboard_reset(vnc_client->clipboard, "text/plain");
guac_common_clipboard_append(vnc_client->clipboard, received_data, output - received_data);
guac_common_clipboard_send(vnc_client->clipboard, gc);
}

48
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@ -26,24 +26,58 @@
#include "config.h"
#include <guacamole/client.h>
#include <guacamole/stream.h>
#include <guacamole/user.h>
#include <rfb/rfbclient.h>
/**
* Handler for inbound clipboard data.
* Sets the encoding of clipboard data exchanged with the VNC server to the
* encoding having the given name. If the name is NULL, or is invalid, the
* standard ISO8859-1 encoding will be used.
*
* @param client
* The client to set the clipboard encoding of.
*
* @param name
* The name of the encoding to use for all clipboard data. Valid values
* are: "ISO8859-1", "UTF-8", "UTF-16", "CP1252", or NULL.
*
* @return
* Zero if the chosen encoding is standard for VNC, or non-zero if the VNC
* standard is being violated.
*/
int guac_vnc_clipboard_handler(guac_client* client, guac_stream* stream,
char* mimetype);
int guac_vnc_set_clipboard_encoding(guac_client* client,
const char* name);
/**
* Handler for inbound clipboard data from Guacamole users.
*/
guac_user_clipboard_handler guac_vnc_clipboard_handler;
/**
* Handler for stream data related to clipboard.
*/
int guac_vnc_clipboard_blob_handler(guac_client* client, guac_stream* stream,
void* data, int length);
guac_user_blob_handler guac_vnc_clipboard_blob_handler;
/**
* Handler for end-of-stream related to clipboard.
*/
int guac_vnc_clipboard_end_handler(guac_client* client, guac_stream* stream);
guac_user_end_handler guac_vnc_clipboard_end_handler;
/**
* Handler for clipboard data received via VNC, invoked by libVNCServer
* whenever text has been copied or cut within the VNC session.
*
* @param client
* The VNC client associated with the session in which the user cut or
* copied text.
*
* @param text
* The string of cut/copied text.
*
* @param textlen
* The number of bytes in the string of cut/copied text.
*/
void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen);
#endif

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@ -0,0 +1,131 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "guac_cursor.h"
#include "guac_display.h"
#include "guac_surface.h"
#include "vnc.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
/* Define cairo_format_stride_for_width() if missing */
#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
#define cairo_format_stride_for_width(format, width) (width*4)
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <syslog.h>
void guac_vnc_cursor(rfbClient* client, int x, int y, int w, int h, int bpp) {
guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
/* Cairo image buffer */
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, w);
unsigned char* buffer = malloc(h*stride);
unsigned char* buffer_row_current = buffer;
/* VNC image buffer */
unsigned int fb_stride = bpp * w;
unsigned char* fb_row_current = client->rcSource;
unsigned char* fb_mask = client->rcMask;
int dx, dy;
/* Copy image data from VNC client to RGBA buffer */
for (dy = 0; dy<h; dy++) {
unsigned int* buffer_current;
unsigned char* fb_current;
/* Get current buffer row, advance to next */
buffer_current = (unsigned int*) buffer_row_current;
buffer_row_current += stride;
/* Get current framebuffer row, advance to next */
fb_current = fb_row_current;
fb_row_current += fb_stride;
for (dx = 0; dx<w; dx++) {
unsigned char alpha, red, green, blue;
unsigned int v;
/* Read current pixel value */
switch (bpp) {
case 4:
v = *((uint32_t*) fb_current);
break;
case 2:
v = *((uint16_t*) fb_current);
break;
default:
v = *((uint8_t*) fb_current);
}
/* Translate mask to alpha */
if (*(fb_mask++)) alpha = 0xFF;
else alpha = 0x00;
/* Translate value to RGB */
red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
/* Output ARGB */
if (vnc_client->settings->swap_red_blue)
*(buffer_current++) = (alpha << 24) | (blue << 16) | (green << 8) | red;
else
*(buffer_current++) = (alpha << 24) | (red << 16) | (green << 8) | blue;
/* Next VNC pixel */
fb_current += bpp;
}
}
/* Update stored cursor information */
guac_common_cursor_set_argb(vnc_client->display->cursor, x, y,
buffer, w, h, stride);
/* Free surface */
free(buffer);
/* libvncclient does not free rcMask as it does rcSource */
free(client->rcMask);
}

61
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@ -0,0 +1,61 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUAC_VNC_CURSOR_H
#define GUAC_VNC_CURSOR_H
#include "config.h"
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
/**
* Callback invoked by libVNCServer when it receives a new cursor image from
* the VNC server. The cursor image itself will be split across
* client->rcSource and client->rcMask, where rcSource is an image buffer of
* the format natively used by the current VNC connection, and rcMask is an
* array if bitmasks. Each bit within rcMask corresponds to a pixel within
* rcSource, where a 0 denotes full transparency and a 1 denotes full opacity.
*
* @param client
* The VNC client associated with the VNC session in which the new cursor
* image was received.
*
* @param x
* The X coordinate of the new cursor image's hotspot, in pixels.
*
* @param y
* The Y coordinate of the new cursor image's hotspot, in pixels.
*
* @param w
* The width of the cursor image, in pixels.
*
* @param h
* The height of the cursor image, in pixels.
*
* @param bpp
* The number of bytes in each pixel, which must be either 4, 2, or 1.
*/
void guac_vnc_cursor(rfbClient* client, int x, int y, int w, int h, int bpp);
#endif

209
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@ -0,0 +1,209 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "guac_iconv.h"
#include "guac_surface.h"
#include "vnc.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
/* Define cairo_format_stride_for_width() if missing */
#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
#define cairo_format_stride_for_width(format, width) (width*4)
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <syslog.h>
void guac_vnc_update(rfbClient* client, int x, int y, int w, int h) {
guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
int dx, dy;
/* Cairo image buffer */
int stride;
unsigned char* buffer;
unsigned char* buffer_row_current;
cairo_surface_t* surface;
/* VNC framebuffer */
unsigned int bpp;
unsigned int fb_stride;
unsigned char* fb_row_current;
/* Ignore extra update if already handled by copyrect */
if (vnc_client->copy_rect_used) {
vnc_client->copy_rect_used = 0;
return;
}
/* Init Cairo buffer */
stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, w);
buffer = malloc(h*stride);
buffer_row_current = buffer;
bpp = client->format.bitsPerPixel/8;
fb_stride = bpp * client->width;
fb_row_current = client->frameBuffer + (y * fb_stride) + (x * bpp);
/* Copy image data from VNC client to PNG */
for (dy = y; dy<y+h; dy++) {
unsigned int* buffer_current;
unsigned char* fb_current;
/* Get current buffer row, advance to next */
buffer_current = (unsigned int*) buffer_row_current;
buffer_row_current += stride;
/* Get current framebuffer row, advance to next */
fb_current = fb_row_current;
fb_row_current += fb_stride;
for (dx = x; dx<x+w; dx++) {
unsigned char red, green, blue;
unsigned int v;
switch (bpp) {
case 4:
v = *((uint32_t*) fb_current);
break;
case 2:
v = *((uint16_t*) fb_current);
break;
default:
v = *((uint8_t*) fb_current);
}
/* Translate value to RGB */
red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
/* Output RGB */
if (vnc_client->settings->swap_red_blue)
*(buffer_current++) = (blue << 16) | (green << 8) | red;
else
*(buffer_current++) = (red << 16) | (green << 8) | blue;
fb_current += bpp;
}
}
/* Create surface from decoded buffer */
surface = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_RGB24,
w, h, stride);
/* Draw directly to default layer */
guac_common_surface_draw(vnc_client->display->default_surface,
x, y, surface);
/* Free surface */
cairo_surface_destroy(surface);
free(buffer);
}
void guac_vnc_copyrect(rfbClient* client, int src_x, int src_y, int w, int h, int dest_x, int dest_y) {
guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
/* Copy specified rectangle within default layer */
guac_common_surface_copy(vnc_client->display->default_surface,
src_x, src_y, w, h,
vnc_client->display->default_surface, dest_x, dest_y);
vnc_client->copy_rect_used = 1;
}
void guac_vnc_set_pixel_format(rfbClient* client, int color_depth) {
switch(color_depth) {
case 8:
client->format.depth = 8;
client->format.bitsPerPixel = 8;
client->format.blueShift = 6;
client->format.redShift = 0;
client->format.greenShift = 3;
client->format.blueMax = 3;
client->format.redMax = 7;
client->format.greenMax = 7;
break;
case 16:
client->format.depth = 16;
client->format.bitsPerPixel = 16;
client->format.blueShift = 0;
client->format.redShift = 11;
client->format.greenShift = 5;
client->format.blueMax = 0x1f;
client->format.redMax = 0x1f;
client->format.greenMax = 0x3f;
break;
case 24:
case 32:
default:
client->format.depth = 24;
client->format.bitsPerPixel = 32;
client->format.blueShift = 0;
client->format.redShift = 16;
client->format.greenShift = 8;
client->format.blueMax = 0xff;
client->format.redMax = 0xff;
client->format.greenMax = 0xff;
}
}
rfbBool guac_vnc_malloc_framebuffer(rfbClient* rfb_client) {
guac_client* gc = rfbClientGetClientData(rfb_client, GUAC_VNC_CLIENT_KEY);
guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
/* Resize surface */
if (vnc_client->display != NULL)
guac_common_surface_resize(vnc_client->display->default_surface,
rfb_client->width, rfb_client->height);
/* Use original, wrapped proc */
return vnc_client->rfb_MallocFrameBuffer(rfb_client);
}

120
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@ -0,0 +1,120 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUAC_VNC_DISPLAY_H
#define GUAC_VNC_DISPLAY_H
#include "config.h"
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
/**
* Callback invoked by libVNCServer when it receives a new binary image data.
* the VNC server. The image itself will be stored in the designated sub-
* rectangle of client->framebuffer.
*
* @param client
* The VNC client associated with the VNC session in which the new image
* was received.
*
* @param x
* The X coordinate of the upper-left corner of the destination rectangle
* in which the image should be drawn, in pixels.
*
* @param y
* The Y coordinate of the upper-left corner of the destination rectangle
* in which the image should be drawn, in pixels.
*
* @param w
* The width of the image, in pixels.
*
* @param h
* The height of the image, in pixels.
*/
void guac_vnc_update(rfbClient* client, int x, int y, int w, int h);
/**
* Callback invoked by libVNCServer when it receives a CopyRect message.
* CopyRect specified a rectangle of source data within the display and a
* set of X/Y coordinates to which that rectangle should be copied.
*
* @param client
* The VNC client associated with the VNC session in which the CopyRect
* was received.
*
* @param src_x
* The X coordinate of the upper-left corner of the source rectangle
* from which the image data should be copied, in pixels.
*
* @param src_y
* The Y coordinate of the upper-left corner of the source rectangle
* from which the image data should be copied, in pixels.
*
* @param w
* The width of the source and destination rectangles, in pixels.
*
* @param h
* The height of the source and destination rectangles, in pixels.
*
* @param dest_x
* The X coordinate of the upper-left corner of the destination rectangle
* in which the copied image data should be drawn, in pixels.
*
* @param dest_y
* The Y coordinate of the upper-left corner of the destination rectangle
* in which the copied image data should be drawn, in pixels.
*/
void guac_vnc_copyrect(rfbClient* client, int src_x, int src_y, int w, int h,
int dest_x, int dest_y);
/**
* Sets the pixel format to request of the VNC server. The request will be made
* during the connection handshake with the VNC server using the values
* specified by this function. Note that the VNC server is not required to
* honor this request.
*
* @param client
* The VNC client associated with the VNC session whose desired pixel
* format should be set.
*
* @param color_depth
* The desired new color depth, in bits per pixel. Valid values are 8, 16,
* 24, and 32.
*/
void guac_vnc_set_pixel_format(rfbClient* client, int color_depth);
/**
* Overridden implementation of the rfb_MallocFrameBuffer function invoked by
* libVNCServer when the display is being resized (or initially allocated).
*
* @param client
* The VNC client associated with the VNC session whose display needs to be
* allocated or reallocated.
*
* @return
* The original value returned by rfb_MallocFrameBuffer().
*/
rfbBool guac_vnc_malloc_framebuffer(rfbClient* rfb_client);
#endif

190
src/protocols/vnc/guac_handlers.c
View File

@ -1,190 +0,0 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "guac_clipboard.h"
#include "guac_surface.h"
#include <guacamole/client.h>
#include <guacamole/protocol.h>
#include <guacamole/timestamp.h>
#include <rfb/rfbclient.h>
#ifdef ENABLE_COMMON_SSH
#include <guac_sftp.h>
#include <guac_ssh.h>
#include <guac_ssh_user.h>
#endif
#ifdef ENABLE_PULSE
#include "pulse.h"
#endif
#include <stdlib.h>
/**
* Waits until data is available to be read from the given rfbClient, and thus
* a call to HandleRFBServerMessages() should not block. If the timeout elapses
* before data is available, zero is returned.
*
* @param rfb_client
* The rfbClient to wait for.
*
* @param timeout
* The maximum amount of time to wait, in microseconds.
*
* @returns
* A positive value if data is available, zero if the timeout elapses
* before data becomes available, or a negative value on error.
*/
static int guac_vnc_wait_for_messages(rfbClient* rfb_client, int timeout) {
/* Do not explicitly wait while data is on the buffer */
if (rfb_client->buffered)
return 1;
/* If no data on buffer, wait for data on socket */
return WaitForMessage(rfb_client, timeout);
}
int vnc_guac_client_handle_messages(guac_client* client) {
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) client->data;
rfbClient* rfb_client = guac_client_data->rfb_client;
/* Initially wait for messages */
int wait_result = guac_vnc_wait_for_messages(rfb_client, 1000000);
guac_timestamp frame_start = guac_timestamp_current();
while (wait_result > 0) {
guac_timestamp frame_end;
int frame_remaining;
/* Handle any message received */
if (!HandleRFBServerMessage(rfb_client)) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Error handling message from VNC server.");
return 1;
}
/* Calculate time remaining in frame */
frame_end = guac_timestamp_current();
frame_remaining = frame_start + GUAC_VNC_FRAME_DURATION - frame_end;
/* Wait again if frame remaining */
if (frame_remaining > 0)
wait_result = guac_vnc_wait_for_messages(rfb_client,
GUAC_VNC_FRAME_TIMEOUT*1000);
else
break;
}
/* If an error occurs, log it and fail */
if (wait_result < 0) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Connection closed.");
return 1;
}
guac_common_surface_flush(guac_client_data->default_surface);
return 0;
}
int vnc_guac_client_mouse_handler(guac_client* client, int x, int y, int mask) {
rfbClient* rfb_client = ((vnc_guac_client_data*) client->data)->rfb_client;
SendPointerEvent(rfb_client, x, y, mask);
return 0;
}
int vnc_guac_client_key_handler(guac_client* client, int keysym, int pressed) {
rfbClient* rfb_client = ((vnc_guac_client_data*) client->data)->rfb_client;
SendKeyEvent(rfb_client, keysym, pressed);
return 0;
}
int vnc_guac_client_free_handler(guac_client* client) {
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) client->data;
rfbClient* rfb_client = guac_client_data->rfb_client;
#ifdef ENABLE_PULSE
/* If audio enabled, stop streaming */
if (guac_client_data->audio_enabled)
guac_pa_stop_stream(client);
#endif
#ifdef ENABLE_COMMON_SSH
/* Free SFTP filesystem, if loaded */
if (guac_client_data->sftp_filesystem)
guac_common_ssh_destroy_sftp_filesystem(guac_client_data->sftp_filesystem);
/* Free SFTP session */
if (guac_client_data->sftp_session)
guac_common_ssh_destroy_session(guac_client_data->sftp_session);
/* Free SFTP user */
if (guac_client_data->sftp_user)
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
guac_common_ssh_uninit();
#endif
/* Free encodings string, if used */
if (guac_client_data->encodings != NULL)
free(guac_client_data->encodings);
/* Free clipboard */
guac_common_clipboard_free(guac_client_data->clipboard);
/* Free surface */
guac_common_surface_free(guac_client_data->default_surface);
/* Free generic data struct */
free(client->data);
/* Free memory not free'd by libvncclient's rfbClientCleanup() */
if (rfb_client->frameBuffer != NULL) free(rfb_client->frameBuffer);
if (rfb_client->raw_buffer != NULL) free(rfb_client->raw_buffer);
if (rfb_client->rcSource != NULL) free(rfb_client->rcSource);
/* Free VNC rfbClientData linked list (not free'd by rfbClientCleanup()) */
while (rfb_client->clientData != NULL) {
rfbClientData* next = rfb_client->clientData->next;
free(rfb_client->clientData);
rfb_client->clientData = next;
}
/* Clean up VNC client*/
rfbClientCleanup(rfb_client);
return 0;
}

53
src/protocols/vnc/input.c Normal file
View File

@ -0,0 +1,53 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "guac_cursor.h"
#include "guac_display.h"
#include "vnc.h"
#include <guacamole/user.h>
#include <rfb/rfbclient.h>
int guac_vnc_user_mouse_handler(guac_user* user, int x, int y, int mask) {
guac_client* client = user->client;
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
/* Store current mouse location */
guac_common_cursor_move(vnc_client->display->cursor, user, x, y);
SendPointerEvent(vnc_client->rfb_client, x, y, mask);
return 0;
}
int guac_vnc_user_key_handler(guac_user* user, int keysym, int pressed) {
guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
SendKeyEvent(vnc_client->rfb_client, keysym, pressed);
return 0;
}

19
src/protocols/vnc/guac_handlers.h → src/protocols/vnc/input.h
View File

@ -21,17 +21,22 @@
*/
#ifndef __GUAC_VNC_GUAC_HANDLERS_H
#define __GUAC_VNC_GUAC_HANDLERS_H
#ifndef GUAC_VNC_INPUT_H
#define GUAC_VNC_INPUT_H
#include "config.h"
#include <guacamole/client.h>
#include <guacamole/user.h>
int vnc_guac_client_handle_messages(guac_client* client);
int vnc_guac_client_mouse_handler(guac_client* client, int x, int y, int mask);
int vnc_guac_client_key_handler(guac_client* client, int keysym, int pressed);
int vnc_guac_client_free_handler(guac_client* client);
/**
* Handler for Guacamole user mouse events.
*/
guac_user_mouse_handler guac_vnc_user_mouse_handler;
/**
* Handler for Guacamole user key events.
*/
guac_user_key_handler guac_vnc_user_key_handler;
#endif

71
src/protocols/vnc/log.c Normal file
View File

@ -0,0 +1,71 @@
/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "guac_iconv.h"
#include "guac_surface.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
void guac_vnc_client_log_info(const char* format, ...) {
char message[2048];
/* Copy log message into buffer */
va_list args;
va_start(args, format);
vsnprintf(message, sizeof(message), format, args);
va_end(args);
/* Log to syslog */
syslog(LOG_INFO, "%s", message);
}
void guac_vnc_client_log_error(const char* format, ...) {
char message[2048];
/* Copy log message into buffer */
va_list args;
va_start(args, format);
vsnprintf(message, sizeof(message), format, args);
va_end(args);
/* Log to syslog */
syslog(LOG_ERR, "%s", message);
}

71
src/protocols/vnc/log.h Normal file
View File

@ -0,0 +1,71 @@
/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUAC_VNC_LOG_H
#define GUAC_VNC_LOG_H
#include "config.h"
#include "client.h"
#include "guac_iconv.h"
#include "guac_surface.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
/**
* Callback invoked by libVNCServer when an informational message needs to be
* logged.
*
* @param format
* A printf-style format string to log.
*
* @param ...
* The values to use when filling the conversion specifiers within the
* format string.
*/
void guac_vnc_client_log_info(const char* format, ...);
/**
* Callback invoked by libVNCServer when an error message needs to be logged.
*
* @param format
* A printf-style format string to log.
*
* @param ...
* The values to use when filling the conversion specifiers within the
* format string.
*/
void guac_vnc_client_log_error(const char* format, ...);
#endif

22
src/protocols/vnc/pulse.c
View File

@ -22,8 +22,8 @@
#include "config.h"
#include "client.h"
#include "pulse.h"
#include "vnc.h"
#include <guacamole/audio.h>
#include <guacamole/client.h>
@ -66,8 +66,8 @@ static void __stream_read_callback(pa_stream* stream, size_t length,
void* data) {
guac_client* client = (guac_client*) data;
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_audio_stream* audio = client_data->audio;
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
guac_audio_stream* audio = vnc_client->audio;
const void* buffer;
@ -231,35 +231,37 @@ static void __context_state_callback(pa_context* context, void* data) {
void guac_pa_start_stream(guac_client* client) {
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
guac_vnc_settings* settings = vnc_client->settings;
pa_context* context;
guac_client_log(client, GUAC_LOG_INFO, "Starting audio stream");
/* Init main loop */
client_data->pa_mainloop = pa_threaded_mainloop_new();
vnc_client->pa_mainloop = pa_threaded_mainloop_new();
/* Create context */
context = pa_context_new(
pa_threaded_mainloop_get_api(client_data->pa_mainloop),
pa_threaded_mainloop_get_api(vnc_client->pa_mainloop),
"Guacamole Audio");
/* Set up context */
pa_context_set_state_callback(context, __context_state_callback, client);
pa_context_connect(context, client_data->pa_servername,
pa_context_connect(context, settings->pa_servername,
PA_CONTEXT_NOAUTOSPAWN, NULL);
/* Start loop */
pa_threaded_mainloop_start(client_data->pa_mainloop);
pa_threaded_mainloop_start(vnc_client->pa_mainloop);
}
void guac_pa_stop_stream(guac_client* client) {
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
/* Stop loop */
pa_threaded_mainloop_stop(client_data->pa_mainloop);
pa_threaded_mainloop_stop(vnc_client->pa_mainloop);
guac_client_log(client, GUAC_LOG_INFO, "Audio stream finished");

2
src/protocols/vnc/pulse.h
View File

@ -26,6 +26,8 @@
#include "config.h"
#include <guacamole/client.h>
/**
* The number of bytes to request for the audio fragments received from
* PulseAudio.

418
src/protocols/vnc/settings.c Normal file
View File

@ -0,0 +1,418 @@
/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "settings.h"
#include <guacamole/user.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
/* Client plugin arguments */
const char* GUAC_VNC_CLIENT_ARGS[] = {
"hostname",
"port",
"read-only",
"encodings",
"password",
"swap-red-blue",
"color-depth",
"cursor",
"autoretry",
"clipboard-encoding",
#ifdef ENABLE_VNC_REPEATER
"dest-host",
"dest-port",
#endif
#ifdef ENABLE_PULSE
"enable-audio",
"audio-servername",
#endif
#ifdef ENABLE_VNC_LISTEN
"reverse-connect",
"listen-timeout",
#endif
#ifdef ENABLE_COMMON_SSH
"enable-sftp",
"sftp-hostname",
"sftp-port",
"sftp-username",
"sftp-password",
"sftp-private-key",
"sftp-passphrase",
"sftp-directory",
#endif
NULL
};
enum VNC_ARGS_IDX {
/**
* The hostname of the VNC server (or repeater) to connect to.
*/
IDX_HOSTNAME,
/**
* The port of the VNC server (or repeater) to connect to.
*/
IDX_PORT,
/**
* "true" if this connection should be read-only (user input should be
* dropped), "false" or blank otherwise.
*/
IDX_READ_ONLY,
/**
* Space-separated list of encodings to use within the VNC session. If not
* specified, this will be:
*
* "zrle ultra copyrect hextile zlib corre rre raw".
*/
IDX_ENCODINGS,
/**
* The password to send to the VNC server if authentication is requested.
*/
IDX_PASSWORD,
/**
* "true" if the red and blue components of each color should be swapped,
* "false" or blank otherwise. This is mainly used for VNC servers that do
* not properly handle colors.
*/
IDX_SWAP_RED_BLUE,
/**
* The color depth to request, in bits.
*/
IDX_COLOR_DEPTH,
/**
* "remote" if the cursor should be rendered on the server instead of the
* client. All other values will default to local rendering.
*/
IDX_CURSOR,
/**
* The number of connection attempts to make before giving up. By default,
* this will be 0.
*/
IDX_AUTORETRY,
/**
* The encoding to use for clipboard data sent to the VNC server if we are
* going to be deviating from the standard (which mandates ISO 8829-1).
* Valid values are "ISO8829-1" (the only legal value with respect to the
* VNC standard), "UTF-8", "UTF-16", and "CP2252".
*/
IDX_CLIPBOARD_ENCODING,
#ifdef ENABLE_VNC_REPEATER
/**
* The VNC host to connect to, if using a repeater.
*/
IDX_DEST_HOST,
/**
* The VNC port to connect to, if using a repeater.
*/
IDX_DEST_PORT,
#endif
#ifdef ENABLE_PULSE
/**
* "true" if audio should be enabled, "false" or blank otherwise.
*/
IDX_ENABLE_AUDIO,
/**
* The name of the PulseAudio server to connect to. If left blank, the
* default sink of the local machine will be used as the source for audio.
*/
IDX_AUDIO_SERVERNAME,
#endif
#ifdef ENABLE_VNC_LISTEN
/**
* "true" if not actually connecting to a VNC server, but rather listening
* for a connection from the VNC server (reverse connection), "false" or
* blank otherwise.
*/
IDX_REVERSE_CONNECT,
/**
* The maximum amount of time to wait when listening for connections, in
* milliseconds. If unspecified, this will default to 5000.
*/
IDX_LISTEN_TIMEOUT,
#endif
#ifdef ENABLE_COMMON_SSH
/**
* "true" if SFTP should be enabled for the VNC connection, "false" or
* blank otherwise.
*/
IDX_ENABLE_SFTP,
/**
* The hostname of the SSH server to connect to for SFTP. If blank, the
* hostname of the VNC server will be used.
*/
IDX_SFTP_HOSTNAME,
/**
* The port of the SSH server to connect to for SFTP. If blank, the default
* SSH port of "22" will be used.
*/
IDX_SFTP_PORT,
/**
* The username to provide when authenticating with the SSH server for
* SFTP.
*/
IDX_SFTP_USERNAME,
/**
* The password to provide when authenticating with the SSH server for
* SFTP (if not using a private key).
*/
IDX_SFTP_PASSWORD,
/**
* The base64-encoded private key to use when authenticating with the SSH
* server for SFTP (if not using a password).
*/
IDX_SFTP_PRIVATE_KEY,
/**
* The passphrase to use to decrypt the provided base64-encoded private
* key.
*/
IDX_SFTP_PASSPHRASE,
/**
* The default location for file uploads within the SSH server. This will
* apply only to uploads which do not use the filesystem guac_object (where
* the destination directory is otherwise ambiguous).
*/
IDX_SFTP_DIRECTORY,
#endif
VNC_ARGS_COUNT
};
guac_vnc_settings* guac_vnc_parse_args(guac_user* user,
int argc, const char** argv) {
/* Validate arg count */
if (argc != VNC_ARGS_COUNT) {
guac_user_log(user, GUAC_LOG_WARNING, "Incorrect number of connection "
"parameters provided: expected %i, got %i.",
VNC_ARGS_COUNT, argc);
return NULL;
}
guac_vnc_settings* settings = calloc(1, sizeof(guac_vnc_settings));
settings->hostname =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_HOSTNAME, "");
settings->port =
guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_PORT, 0);
settings->password =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_PASSWORD, ""); /* NOTE: freed by libvncclient */
/* Remote cursor */
if (strcmp(argv[IDX_CURSOR], "remote") == 0) {
guac_user_log(user, GUAC_LOG_INFO, "Cursor rendering: remote");
settings->remote_cursor = true;
}
/* Local cursor */
else {
guac_user_log(user, GUAC_LOG_INFO, "Cursor rendering: local");
settings->remote_cursor = false;
}
/* Swap red/blue (for buggy VNC servers) */
settings->swap_red_blue =
guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SWAP_RED_BLUE, false);
/* Read-only mode */
settings->read_only =
guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_READ_ONLY, false);
/* Parse color depth */
settings->color_depth =
guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_COLOR_DEPTH, 0);
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
settings->dest_host =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_DEST_HOST, NULL);
/* VNC repeater port */
settings->dest_port =
guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_DEST_PORT, 0);
#endif
/* Set encodings if specified */
settings->encodings =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_ENCODINGS,
"zrle ultra copyrect hextile zlib corre rre raw");
/* Parse autoretry */
settings->retries =
guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_AUTORETRY, 0);
#ifdef ENABLE_VNC_LISTEN
/* Set reverse-connection flag */
settings->reverse_connect =
guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_REVERSE_CONNECT, false);
/* Parse listen timeout */
settings->listen_timeout =
guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_LISTEN_TIMEOUT, 5000);
#endif
#ifdef ENABLE_PULSE
/* Audio enable/disable */
settings->audio_enabled =
guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_ENABLE_AUDIO, false);
/* Load servername if specified and applicable */
if (settings->audio_enabled)
settings->pa_servername =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_AUDIO_SERVERNAME, NULL);
#endif
/* Set clipboard encoding if specified */
settings->clipboard_encoding =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_CLIPBOARD_ENCODING, NULL);
#ifdef ENABLE_COMMON_SSH
/* SFTP enable/disable */
settings->enable_sftp =
guac_user_parse_args_boolean(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_ENABLE_SFTP, false);
/* Hostname for SFTP connection */
settings->sftp_hostname =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_HOSTNAME, settings->hostname);
/* Port for SFTP connection */
settings->sftp_port =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_PORT, "22");
/* Username for SSH/SFTP authentication */
settings->sftp_username =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_USERNAME, "");
/* Password for SFTP (if not using private key) */
settings->sftp_password =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_PASSWORD, "");
/* Private key for SFTP (if not using password) */
settings->sftp_private_key =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_PRIVATE_KEY, NULL);
/* Passphrase for decrypting the SFTP private key (if applicable */
settings->sftp_passphrase =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_PASSPHRASE, "");
/* Default upload directory */
settings->sftp_directory =
guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
IDX_SFTP_DIRECTORY, NULL);
#endif
return settings;
}
void guac_vnc_settings_free(guac_vnc_settings* settings) {
/* Free settings strings */
free(settings->clipboard_encoding);
free(settings->encodings);
free(settings->hostname);
#ifdef ENABLE_VNC_REPEATER
/* Free VNC repeater settings */
free(settings->dest_host);
#endif
#ifdef ENABLE_COMMON_SSH
/* Free SFTP settings */
free(settings->sftp_directory);
free(settings->sftp_hostname);
free(settings->sftp_passphrase);
free(settings->sftp_password);
free(settings->sftp_port);
free(settings->sftp_private_key);
free(settings->sftp_username);
#endif
#ifdef ENABLE_PULSE
/* Free PulseAudio settings */
free(settings->pa_servername);
#endif
/* Free settings structure */
free(settings);
}

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/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef __GUAC_VNC_SETTINGS_H
#define __GUAC_VNC_SETTINGS_H
#include "config.h"
#include <stdbool.h>
/**
* VNC-specific client data.
*/
typedef struct guac_vnc_settings {
/**
* The hostname of the VNC server (or repeater) to connect to.
*/
char* hostname;
/**
* The port of the VNC server (or repeater) to connect to.
*/
int port;
/**
* The password given in the arguments.
*/
char* password;
/**
* Space-separated list of encodings to use within the VNC session.
*/
char* encodings;
/**
* Whether the red and blue components of each color should be swapped.
* This is mainly used for VNC servers that do not properly handle
* colors.
*/
bool swap_red_blue;
/**
* The color depth to request, in bits.
*/
int color_depth;
/**
* Whether this connection is read-only, and user input should be dropped.
*/
bool read_only;
#ifdef ENABLE_VNC_REPEATER
/**
* The VNC host to connect to, if using a repeater.
*/
char* dest_host;
/**
* The VNC port to connect to, if using a repeater.
*/
int dest_port;
#endif
#ifdef ENABLE_VNC_LISTEN
/**
* Whether not actually connecting to a VNC server, but rather listening
* for a connection from the VNC server (reverse connection).
*/
bool reverse_connect;
/**
* The maximum amount of time to wait when listening for connections, in
* milliseconds.
*/
int listen_timeout;
#endif
/**
* Whether the cursor should be rendered on the server (remote) or on the
* client (local).
*/
bool remote_cursor;
#ifdef ENABLE_PULSE
/**
* Whether audio is enabled.
*/
bool audio_enabled;
/**
* The name of the PulseAudio server to connect to.
*/
char* pa_servername;
#endif
/**
* The number of connection attempts to make before giving up.
*/
int retries;
/**
* The encoding to use for clipboard data sent to the VNC server, or NULL
* to use the encoding required by the VNC standard.
*/
char* clipboard_encoding;
#ifdef ENABLE_COMMON_SSH
/**
* Whether SFTP should be enabled for the VNC connection.
*/
bool enable_sftp;
/**
* The hostname of the SSH server to connect to for SFTP.
*/
char* sftp_hostname;
/**
* The port of the SSH server to connect to for SFTP.
*/
char* sftp_port;
/**
* The username to provide when authenticating with the SSH server for
* SFTP.
*/
char* sftp_username;
/**
* The password to provide when authenticating with the SSH server for
* SFTP (if not using a private key).
*/
char* sftp_password;
/**
* The base64-encoded private key to use when authenticating with the SSH
* server for SFTP (if not using a password).
*/
char* sftp_private_key;
/**
* The passphrase to use to decrypt the provided base64-encoded private
* key.
*/
char* sftp_passphrase;
/**
* The default location for file uploads within the SSH server. This will
* apply only to uploads which do not use the filesystem guac_object (where
* the destination directory is otherwise ambiguous).
*/
char* sftp_directory;
#endif
} guac_vnc_settings;
/**
* Parses all given args, storing them in a newly-allocated settings object. If
* the args fail to parse, NULL is returned.
*
* @param user
* The user who submitted the given arguments while joining the
* connection.
*
* @param argc
* The number of arguments within the argv array.
*
* @param argv
* The values of all arguments provided by the user.
*
* @return
* A newly-allocated settings object which must be freed with
* guac_vnc_settings_free() when no longer needed. If the arguments fail
* to parse, NULL is returned.
*/
guac_vnc_settings* guac_vnc_parse_args(guac_user* user,
int argc, const char** argv);
/**
* Frees the given guac_vnc_settings object, having been previously allocated
* via guac_vnc_parse_args().
*
* @param settings
* The settings object to free.
*/
void guac_vnc_settings_free(guac_vnc_settings* settings);
/**
* NULL-terminated array of accepted client args.
*/
extern const char* GUAC_VNC_CLIENT_ARGS[];
#endif

12
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@ -22,21 +22,23 @@
#include "config.h"
#include "client.h"
#include "guac_sftp.h"
#include "sftp.h"
#include "vnc.h"
#include <guacamole/client.h>
#include <guacamole/stream.h>
#include <guacamole/user.h>
int guac_vnc_sftp_file_handler(guac_client* client, guac_stream* stream,
int guac_vnc_sftp_file_handler(guac_user* user, guac_stream* stream,
char* mimetype, char* filename) {
vnc_guac_client_data* client_data = (vnc_guac_client_data*) client->data;
guac_object* filesystem = client_data->sftp_filesystem;
guac_client* client = user->client;
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
guac_common_ssh_sftp_filesystem* filesystem = vnc_client->sftp_filesystem;
/* Handle file upload */
return guac_common_ssh_sftp_handle_file_stream(filesystem, stream,
return guac_common_ssh_sftp_handle_file_stream(filesystem, user, stream,
mimetype, filename);
}

22
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@ -25,31 +25,13 @@
#include "config.h"
#include <guacamole/client.h>
#include <guacamole/stream.h>
#include <guacamole/user.h>
/**
* Handles an incoming stream from a Guacamole "file" instruction, saving the
* contents of that stream to the file having the given name.
*
* @param client
* The client receiving the uploaded file.
*
* @param stream
* The stream through which the uploaded file data will be received.
*
* @param mimetype
* The mimetype of the data being received.
*
* @param filename
* The filename of the file to write to.
*
* @return
* Zero if the incoming stream has been handled successfully, non-zero on
* failure.
*/
int guac_vnc_sftp_file_handler(guac_client* client, guac_stream* stream,
char* mimetype, char* filename);
guac_user_file_handler guac_vnc_sftp_file_handler;
#endif

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/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "clipboard.h"
#include "input.h"
#include "guac_display.h"
#include "guac_dot_cursor.h"
#include "guac_pointer_cursor.h"
#include "user.h"
#include "sftp.h"
#include "vnc.h"
#include <guacamole/audio.h>
#include <guacamole/client.h>
#include <guacamole/socket.h>
#include <guacamole/user.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
#include <pthread.h>
int guac_vnc_user_join_handler(guac_user* user, int argc, char** argv) {
guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
/* Connect via VNC if owner */
if (user->owner) {
/* Parse arguments into client */
guac_vnc_settings* settings = vnc_client->settings =
guac_vnc_parse_args(user, argc, (const char**) argv);
/* Fail if settings cannot be parsed */
if (settings == NULL) {
guac_user_log(user, GUAC_LOG_INFO,
"Badly formatted client arguments.");
return 1;
}
/* Start client thread */
if (pthread_create(&vnc_client->client_thread, NULL, guac_vnc_client_thread, user->client)) {
guac_user_log(user, GUAC_LOG_ERROR, "Unable to start VNC client thread.");
return 1;
}
}
/* If not owner, synchronize with current state */
else {
#ifdef ENABLE_PULSE
/* Synchronize an audio stream */
if (vnc_client->audio)
guac_audio_stream_add_user(vnc_client->audio, user);
#endif
/* Synchronize with current display */
guac_common_display_dup(vnc_client->display, user, user->socket);
guac_socket_flush(user->socket);
}
/* Only handle events if not read-only */
if (vnc_client->settings->read_only == 0) {
/* General mouse/keyboard/clipboard events */
user->mouse_handler = guac_vnc_user_mouse_handler;
user->key_handler = guac_vnc_user_key_handler;
user->clipboard_handler = guac_vnc_clipboard_handler;
#ifdef ENABLE_COMMON_SSH
/* Set generic (non-filesystem) file upload handler */
user->file_handler = guac_vnc_sftp_file_handler;
#endif
}
return 0;
}
int guac_vnc_user_leave_handler(guac_user* user) {
guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
guac_common_cursor_remove_user(vnc_client->display->cursor, user);
return 0;
}

41
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/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUAC_VNC_USER_H
#define GUAC_VNC_USER_H
#include "config.h"
#include <guacamole/user.h>
/**
* Handler for joining users.
*/
guac_user_join_handler guac_vnc_user_join_handler;
/**
* Handler for leaving users.
*/
guac_user_leave_handler guac_vnc_user_leave_handler;
#endif

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/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "auth.h"
#include "client.h"
#include "clipboard.h"
#include "cursor.h"
#include "display.h"
#include "guac_clipboard.h"
#include "guac_cursor.h"
#include "guac_display.h"
#include "log.h"
#include "settings.h"
#include "vnc.h"
#ifdef ENABLE_PULSE
#include "pulse.h"
#endif
#ifdef ENABLE_COMMON_SSH
#include "guac_sftp.h"
#include "guac_ssh.h"
#include "sftp.h"
#endif
#include <guacamole/client.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <guacamole/timestamp.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
char* GUAC_VNC_CLIENT_KEY = "GUAC_VNC";
rfbClient* guac_vnc_get_client(guac_client* client) {
rfbClient* rfb_client = rfbGetClient(8, 3, 4); /* 32-bpp client */
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
guac_vnc_settings* vnc_settings = vnc_client->settings;
/* Store Guac client in rfb client */
rfbClientSetClientData(rfb_client, GUAC_VNC_CLIENT_KEY, client);
/* Framebuffer update handler */
rfb_client->GotFrameBufferUpdate = guac_vnc_update;
rfb_client->GotCopyRect = guac_vnc_copyrect;
/* Do not handle clipboard and local cursor if read-only */
if (vnc_settings->read_only == 0) {
/* Clipboard */
rfb_client->GotXCutText = guac_vnc_cut_text;
/* Set remote cursor */
if (vnc_settings->remote_cursor) {
rfb_client->appData.useRemoteCursor = FALSE;
}
else {
/* Enable client-side cursor */
rfb_client->appData.useRemoteCursor = TRUE;
rfb_client->GotCursorShape = guac_vnc_cursor;
}
}
/* Password */
rfb_client->GetPassword = guac_vnc_get_password;
/* Depth */
guac_vnc_set_pixel_format(rfb_client, vnc_settings->color_depth);
/* Hook into allocation so we can handle resize. */
vnc_client->rfb_MallocFrameBuffer = rfb_client->MallocFrameBuffer;
rfb_client->MallocFrameBuffer = guac_vnc_malloc_framebuffer;
rfb_client->canHandleNewFBSize = 1;
/* Set hostname and port */
rfb_client->serverHost = strdup(vnc_settings->hostname);
rfb_client->serverPort = vnc_settings->port;
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
if (vnc_settings->dest_host) {
rfb_client->destHost = strdup(vnc_settings->dest_host);
rfb_client->destPort = vnc_settings->dest_port;
}
#endif
#ifdef ENABLE_VNC_LISTEN
/* If reverse connection enabled, start listening */
if (vnc_settings->reverse_connect) {
guac_client_log(client, GUAC_LOG_INFO, "Listening for connections on port %i", vnc_settings->port);
/* Listen for connection from server */
rfb_client->listenPort = vnc_settings->port;
if (listenForIncomingConnectionsNoFork(rfb_client, vnc_settings->listen_timeout*1000) <= 0)
return NULL;
}
#endif
/* Set encodings if provided */
if (vnc_settings->encodings)
rfb_client->appData.encodingsString = strdup(vnc_settings->encodings);
/* Connect */
if (rfbInitClient(rfb_client, NULL, NULL))
return rfb_client;
/* If connection fails, return NULL */
return NULL;
}
/**
* Waits until data is available to be read from the given rfbClient, and thus
* a call to HandleRFBServerMessages() should not block. If the timeout elapses
* before data is available, zero is returned.
*
* @param rfb_client
* The rfbClient to wait for.
*
* @param timeout
* The maximum amount of time to wait, in microseconds.
*
* @returns
* A positive value if data is available, zero if the timeout elapses
* before data becomes available, or a negative value on error.
*/
static int guac_vnc_wait_for_messages(rfbClient* rfb_client, int timeout) {
/* Do not explicitly wait while data is on the buffer */
if (rfb_client->buffered)
return 1;
/* If no data on buffer, wait for data on socket */
return WaitForMessage(rfb_client, timeout);
}
void* guac_vnc_client_thread(void* data) {
guac_client* client = (guac_client*) data;
guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
guac_vnc_settings* settings = vnc_client->settings;
/* Configure clipboard encoding */
if (guac_vnc_set_clipboard_encoding(client, settings->clipboard_encoding)) {
guac_client_log(client, GUAC_LOG_INFO, "Using non-standard VNC "
"clipboard encoding: '%s'.", settings->clipboard_encoding);
}
/* Ensure connection is kept alive during lengthy connects */
guac_socket_require_keep_alive(client->socket);
/* Set up libvncclient logging */
rfbClientLog = guac_vnc_client_log_info;
rfbClientErr = guac_vnc_client_log_error;
/* Attempt connection */
rfbClient* rfb_client = guac_vnc_get_client(client);
int retries_remaining = settings->retries;
/* If unsuccessful, retry as many times as specified */
while (!rfb_client && retries_remaining > 0) {
guac_client_log(client, GUAC_LOG_INFO,
"Connect failed. Waiting %ims before retrying...",
GUAC_VNC_CONNECT_INTERVAL);
/* Wait for given interval then retry */
guac_timestamp_msleep(GUAC_VNC_CONNECT_INTERVAL);
rfb_client = guac_vnc_get_client(client);
retries_remaining--;
}
/* If the final connect attempt fails, return error */
if (!rfb_client) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Unable to connect to VNC server.");
return NULL;
}
#ifdef ENABLE_PULSE
/* If an encoding is available, load an audio stream */
if (settings->audio_enabled) {
vnc_client->audio = guac_audio_stream_alloc(client, NULL,
GUAC_VNC_AUDIO_RATE,
GUAC_VNC_AUDIO_CHANNELS,
GUAC_VNC_AUDIO_BPS);
/* If successful, init audio system */
if (vnc_client->audio != NULL) {
guac_client_log(client, GUAC_LOG_INFO,
"Audio will be encoded as %s",
vnc_client->audio->encoder->mimetype);
/* Start audio stream */
guac_pa_start_stream(client);
}
/* Otherwise, audio loading failed */
else
guac_client_log(client, GUAC_LOG_INFO,
"No available audio encoding. Sound disabled.");
} /* end if audio enabled */
#endif
#ifdef ENABLE_COMMON_SSH
guac_common_ssh_init(client);
/* Connect via SSH if SFTP is enabled */
if (settings->enable_sftp) {
guac_client_log(client, GUAC_LOG_DEBUG,
"Connecting via SSH for SFTP filesystem access.");
vnc_client->sftp_user =
guac_common_ssh_create_user(settings->sftp_username);
/* Import private key, if given */
if (settings->sftp_private_key != NULL) {
guac_client_log(client, GUAC_LOG_DEBUG,
"Authenticating with private key.");
/* Abort if private key cannot be read */
if (guac_common_ssh_user_import_key(vnc_client->sftp_user,
settings->sftp_private_key,
settings->sftp_passphrase)) {
guac_common_ssh_destroy_user(vnc_client->sftp_user);
return NULL;
}
}
/* Otherwise, use specified password */
else {
guac_client_log(client, GUAC_LOG_DEBUG,
"Authenticating with password.");
guac_common_ssh_user_set_password(vnc_client->sftp_user,
settings->sftp_password);
}
/* Attempt SSH connection */
vnc_client->sftp_session =
guac_common_ssh_create_session(client, settings->sftp_hostname,
settings->sftp_port, vnc_client->sftp_user);
/* Fail if SSH connection does not succeed */
if (vnc_client->sftp_session == NULL) {
/* Already aborted within guac_common_ssh_create_session() */
guac_common_ssh_destroy_user(vnc_client->sftp_user);
return NULL;
}
/* Load filesystem */
vnc_client->sftp_filesystem =
guac_common_ssh_create_sftp_filesystem(
vnc_client->sftp_session, "/");
/* Expose filesystem to connection owner */
guac_client_for_owner(client,
guac_common_ssh_expose_sftp_filesystem,
vnc_client->sftp_filesystem);
/* Abort if SFTP connection fails */
if (vnc_client->sftp_filesystem == NULL) {
guac_common_ssh_destroy_session(vnc_client->sftp_session);
guac_common_ssh_destroy_user(vnc_client->sftp_user);
return NULL;
}
/* Configure destination for basic uploads, if specified */
if (settings->sftp_directory != NULL)
guac_common_ssh_sftp_set_upload_path(
vnc_client->sftp_filesystem,
settings->sftp_directory);
guac_client_log(client, GUAC_LOG_DEBUG,
"SFTP connection succeeded.");
}
#endif
/* Set remaining client data */
vnc_client->rfb_client = rfb_client;
/* Send name */
guac_protocol_send_name(client->socket, rfb_client->desktopName);
/* Create display */
vnc_client->display = guac_common_display_alloc(client,
rfb_client->width, rfb_client->height);
/* If not read-only, set an appropriate cursor */
if (settings->read_only == 0) {
if (settings->remote_cursor)
guac_common_cursor_set_dot(vnc_client->display->cursor);
else
guac_common_cursor_set_pointer(vnc_client->display->cursor);
}
guac_socket_flush(client->socket);
guac_timestamp last_frame_end = guac_timestamp_current();
/* Handle messages from VNC server while client is running */
while (client->state == GUAC_CLIENT_RUNNING) {
/* Wait for start of frame */
int wait_result = guac_vnc_wait_for_messages(rfb_client,
GUAC_VNC_FRAME_START_TIMEOUT);
if (wait_result > 0) {
guac_timestamp frame_start = guac_timestamp_current();
/* Calculate time since last frame */
int time_elapsed = frame_start - last_frame_end;
int processing_lag = guac_client_get_processing_lag(client);
/* Force roughly-equal length of server and client frames */
if (time_elapsed < processing_lag)
guac_timestamp_msleep(processing_lag - time_elapsed);
/* Read server messages until frame is built */
do {
guac_timestamp frame_end;
int frame_remaining;
/* Handle any message received */
if (!HandleRFBServerMessage(rfb_client)) {
guac_client_abort(client,
GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR,
"Error handling message from VNC server.");
break;
}
/* Calculate time remaining in frame */
frame_end = guac_timestamp_current();
frame_remaining = frame_start + GUAC_VNC_FRAME_DURATION
- frame_end;
/* Wait again if frame remaining */
if (frame_remaining > 0)
wait_result = guac_vnc_wait_for_messages(rfb_client,
GUAC_VNC_FRAME_TIMEOUT*1000);
else
break;
} while (wait_result > 0);
/* Record end of frame */
last_frame_end = guac_timestamp_current();
}
/* If an error occurs, log it and fail */
if (wait_result < 0)
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Connection closed.");
guac_common_surface_flush(vnc_client->display->default_surface);
guac_client_end_frame(client);
guac_socket_flush(client->socket);
}
guac_client_log(client, GUAC_LOG_INFO, "Internal VNC client disconnected");
return NULL;
}

169
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/*
* Copyright (C) 2014 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef GUAC_VNC_VNC_H
#define GUAC_VNC_VNC_H
#include "config.h"
#include "guac_clipboard.h"
#include "guac_display.h"
#include "guac_iconv.h"
#include "guac_surface.h"
#include "settings.h"
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <rfb/rfbclient.h>
#ifdef ENABLE_PULSE
#include <guacamole/audio.h>
#include <pulse/pulseaudio.h>
#endif
#ifdef ENABLE_COMMON_SSH
#include "guac_sftp.h"
#include "guac_ssh.h"
#include "guac_ssh_user.h"
#endif
#include <pthread.h>
/**
* VNC-specific client data.
*/
typedef struct guac_vnc_client {
/**
* The VNC client thread.
*/
pthread_t client_thread;
/**
* The underlying VNC client.
*/
rfbClient* rfb_client;
/**
* The original framebuffer malloc procedure provided by the initialized
* rfbClient.
*/
MallocFrameBufferProc rfb_MallocFrameBuffer;
/**
* Whether copyrect was used to produce the latest update received
* by the VNC server.
*/
int copy_rect_used;
/**
* Client settings, parsed from args.
*/
guac_vnc_settings* settings;
/**
* The current display state.
*/
guac_common_display* display;
/**
* Internal clipboard.
*/
guac_common_clipboard* clipboard;
#ifdef ENABLE_PULSE
/**
* Audio output, if any.
*/
guac_audio_stream* audio;
/**
* PulseAudio event loop.
*/
pa_threaded_mainloop* pa_mainloop;
#endif
#ifdef ENABLE_COMMON_SSH
/**
* The user and credentials used to authenticate for SFTP.
*/
guac_common_ssh_user* sftp_user;
/**
* The SSH session used for SFTP.
*/
guac_common_ssh_session* sftp_session;
/**
* An SFTP-based filesystem.
*/
guac_common_ssh_sftp_filesystem* sftp_filesystem;
#endif
/**
* Clipboard encoding-specific reader.
*/
guac_iconv_read* clipboard_reader;
/**
* Clipboard encoding-specific writer.
*/
guac_iconv_write* clipboard_writer;
} guac_vnc_client;
/**
* Allocates a new rfbClient instance given the parameters stored within the
* client, returning NULL on failure.
*
* @param client
* The guac_client associated with the settings of the desired VNC
* connection.
*
* @return
* A new rfbClient instance allocated and connected according to the
* parameters stored within the given client, or NULL if connecting to the
* VNC server fails.
*/
rfbClient* guac_vnc_get_client(guac_client* client);
/**
* VNC client thread. This thread initiates the VNC connection and ultimately
* runs throughout the duration of the client, existing as a single instance,
* shared by all users.
*
* @param data
* The guac_client instance associated with the requested VNC connection.
*
* @return
* Always NULL.
*/
void* guac_vnc_client_thread(void* data);
/**
* Key which can be used with the rfbClientGetClientData function to return
* the associated guac_client.
*/
extern char* GUAC_VNC_CLIENT_KEY;
#endif

350
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@ -1,350 +0,0 @@
/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "guac_iconv.h"
#include "guac_surface.h"
#include <cairo/cairo.h>
#include <guacamole/client.h>
#include <guacamole/layer.h>
#include <guacamole/protocol.h>
#include <guacamole/socket.h>
#include <rfb/rfbclient.h>
#include <rfb/rfbproto.h>
/* Define cairo_format_stride_for_width() if missing */
#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
#define cairo_format_stride_for_width(format, width) (width*4)
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
void guac_vnc_cursor(rfbClient* client, int x, int y, int w, int h, int bpp) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
guac_socket* socket = gc->socket;
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
const guac_layer* cursor_layer = guac_client_data->cursor;
/* Cairo image buffer */
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, w);
unsigned char* buffer = malloc(h*stride);
unsigned char* buffer_row_current = buffer;
cairo_surface_t* surface;
/* VNC image buffer */
unsigned int fb_stride = bpp * w;
unsigned char* fb_row_current = client->rcSource;
unsigned char* fb_mask = client->rcMask;
int dx, dy;
/* Copy image data from VNC client to RGBA buffer */
for (dy = 0; dy<h; dy++) {
unsigned int* buffer_current;
unsigned char* fb_current;
/* Get current buffer row, advance to next */
buffer_current = (unsigned int*) buffer_row_current;
buffer_row_current += stride;
/* Get current framebuffer row, advance to next */
fb_current = fb_row_current;
fb_row_current += fb_stride;
for (dx = 0; dx<w; dx++) {
unsigned char alpha, red, green, blue;
unsigned int v;
/* Read current pixel value */
switch (bpp) {
case 4:
v = *((unsigned int*) fb_current);
break;
case 2:
v = *((unsigned short*) fb_current);
break;
default:
v = *((unsigned char*) fb_current);
}
/* Translate mask to alpha */
if (*(fb_mask++)) alpha = 0xFF;
else alpha = 0x00;
/* Translate value to RGB */
red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
/* Output ARGB */
if (guac_client_data->swap_red_blue)
*(buffer_current++) = (alpha << 24) | (blue << 16) | (green << 8) | red;
else
*(buffer_current++) = (alpha << 24) | (red << 16) | (green << 8) | blue;
/* Next VNC pixel */
fb_current += bpp;
}
}
/* Send cursor data*/
surface = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_ARGB32, w, h, stride);
guac_client_stream_png(gc, socket, GUAC_COMP_SRC, cursor_layer,
0, 0, surface);
/* Update cursor */
guac_protocol_send_cursor(socket, x, y, cursor_layer, 0, 0, w, h);
/* Free surface */
cairo_surface_destroy(surface);
free(buffer);
/* libvncclient does not free rcMask as it does rcSource */
free(client->rcMask);
}
void guac_vnc_update(rfbClient* client, int x, int y, int w, int h) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
int dx, dy;
/* Cairo image buffer */
int stride;
unsigned char* buffer;
unsigned char* buffer_row_current;
cairo_surface_t* surface;
/* VNC framebuffer */
unsigned int bpp;
unsigned int fb_stride;
unsigned char* fb_row_current;
/* Ignore extra update if already handled by copyrect */
if (guac_client_data->copy_rect_used) {
guac_client_data->copy_rect_used = 0;
return;
}
/* Init Cairo buffer */
stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, w);
buffer = malloc(h*stride);
buffer_row_current = buffer;
bpp = client->format.bitsPerPixel/8;
fb_stride = bpp * client->width;
fb_row_current = client->frameBuffer + (y * fb_stride) + (x * bpp);
/* Copy image data from VNC client to PNG */
for (dy = y; dy<y+h; dy++) {
unsigned int* buffer_current;
unsigned char* fb_current;
/* Get current buffer row, advance to next */
buffer_current = (unsigned int*) buffer_row_current;
buffer_row_current += stride;
/* Get current framebuffer row, advance to next */
fb_current = fb_row_current;
fb_row_current += fb_stride;
for (dx = x; dx<x+w; dx++) {
unsigned char red, green, blue;
unsigned int v;
switch (bpp) {
case 4:
v = *((unsigned int*) fb_current);
break;
case 2:
v = *((unsigned short*) fb_current);
break;
default:
v = *((unsigned char*) fb_current);
}
/* Translate value to RGB */
red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
/* Output RGB */
if (guac_client_data->swap_red_blue)
*(buffer_current++) = (blue << 16) | (green << 8) | red;
else
*(buffer_current++) = (red << 16) | (green << 8) | blue;
fb_current += bpp;
}
}
/* For now, only use default layer */
surface = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_RGB24, w, h, stride);
guac_common_surface_draw(guac_client_data->default_surface, x, y, surface);
/* Free surface */
cairo_surface_destroy(surface);
free(buffer);
}
void guac_vnc_copyrect(rfbClient* client, int src_x, int src_y, int w, int h, int dest_x, int dest_y) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
/* For now, only use default layer */
guac_common_surface_copy(guac_client_data->default_surface, src_x, src_y, w, h,
guac_client_data->default_surface, dest_x, dest_y);
((vnc_guac_client_data*) gc->data)->copy_rect_used = 1;
}
char* guac_vnc_get_password(rfbClient* client) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
return ((vnc_guac_client_data*) gc->data)->password;
}
void guac_vnc_set_pixel_format(rfbClient* client, int color_depth) {
switch(color_depth) {
case 8:
client->format.depth = 8;
client->format.bitsPerPixel = 8;
client->format.blueShift = 6;
client->format.redShift = 0;
client->format.greenShift = 3;
client->format.blueMax = 3;
client->format.redMax = 7;
client->format.greenMax = 7;
break;
case 16:
client->format.depth = 16;
client->format.bitsPerPixel = 16;
client->format.blueShift = 0;
client->format.redShift = 11;
client->format.greenShift = 5;
client->format.blueMax = 0x1f;
client->format.redMax = 0x1f;
client->format.greenMax = 0x3f;
break;
case 24:
case 32:
default:
client->format.depth = 24;
client->format.bitsPerPixel = 32;
client->format.blueShift = 0;
client->format.redShift = 16;
client->format.greenShift = 8;
client->format.blueMax = 0xff;
client->format.redMax = 0xff;
client->format.greenMax = 0xff;
}
}
rfbBool guac_vnc_malloc_framebuffer(rfbClient* rfb_client) {
guac_client* gc = rfbClientGetClientData(rfb_client, __GUAC_CLIENT);
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
/* Resize surface */
if (guac_client_data->default_surface != NULL)
guac_common_surface_resize(guac_client_data->default_surface, rfb_client->width, rfb_client->height);
/* Use original, wrapped proc */
return guac_client_data->rfb_MallocFrameBuffer(rfb_client);
}
void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
vnc_guac_client_data* client_data = (vnc_guac_client_data*) gc->data;
char received_data[GUAC_VNC_CLIPBOARD_MAX_LENGTH];
const char* input = text;
char* output = received_data;
guac_iconv_read* reader = client_data->clipboard_reader;
/* Convert clipboard contents */
guac_iconv(reader, &input, textlen,
GUAC_WRITE_UTF8, &output, sizeof(received_data));
/* Send converted data */
guac_common_clipboard_reset(client_data->clipboard, "text/plain");
guac_common_clipboard_append(client_data->clipboard, received_data, output - received_data);
guac_common_clipboard_send(client_data->clipboard, gc);
}
void guac_vnc_client_log_info(const char* format, ...) {
char message[2048];
/* Copy log message into buffer */
va_list args;
va_start(args, format);
vsnprintf(message, sizeof(message), format, args);
va_end(args);
/* Log to syslog */
syslog(LOG_INFO, "%s", message);
}
void guac_vnc_client_log_error(const char* format, ...) {
char message[2048];
/* Copy log message into buffer */
va_list args;
va_start(args, format);
vsnprintf(message, sizeof(message), format, args);
va_end(args);
/* Log to syslog */
syslog(LOG_ERR, "%s", message);
}