guacamole-spice-protocol/src/libguac/protocol.c

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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 "error.h"
#include "layer.h"
#include "object.h"
#include "palette.h"
#include "protocol.h"
#include "socket.h"
#include "stream.h"
#include "unicode.h"
#include <png.h>
#include <cairo/cairo.h>
#include <jpeglib.h>
#ifdef HAVE_PNGSTRUCT_H
#include <pngstruct.h>
#endif
#include <inttypes.h>
#include <setjmp.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
/* Output formatting functions */
ssize_t __guac_socket_write_length_string(guac_socket* socket, const char* str) {
return
guac_socket_write_int(socket, guac_utf8_strlen(str))
|| guac_socket_write_string(socket, ".")
|| guac_socket_write_string(socket, str);
}
ssize_t __guac_socket_write_length_int(guac_socket* socket, int64_t i) {
char buffer[128];
snprintf(buffer, sizeof(buffer), "%"PRIi64, i);
return __guac_socket_write_length_string(socket, buffer);
}
ssize_t __guac_socket_write_length_double(guac_socket* socket, double d) {
char buffer[128];
snprintf(buffer, sizeof(buffer), "%.16g", d);
return __guac_socket_write_length_string(socket, buffer);
}
/**
* Converts the image data on a Cairo surface to a JPEG image and sends it
* as a base64-encoded transmission on the socket.
*
* @param socket
* The guac_socket connection to use.
*
* @param surface
*   A cairo surface containing the image data to send.
*
* @param quality
* JPEG image quality.
*
* @return
* Zero on success, non-zero on error.
*/
static int __guac_socket_write_length_jpeg(guac_socket* socket,
cairo_surface_t* surface, int quality) {
/* Get image surface properties and data */
cairo_format_t format = cairo_image_surface_get_format(surface);
if (format != CAIRO_FORMAT_RGB24) {
guac_error = GUAC_STATUS_INTERNAL_ERROR;
guac_error_message = "Invalid Cairo image format. Unable to create JPEG.";
return -1;
}
int width = cairo_image_surface_get_width(surface);
int height = cairo_image_surface_get_height(surface);
int stride = cairo_image_surface_get_stride(surface);
unsigned char* data = cairo_image_surface_get_data(surface);
/* Flush pending operations to surface */
cairo_surface_flush(surface);
/* Prepare JPEG bits */
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
unsigned char *mem = NULL;
unsigned long mem_size = 0;
jpeg_mem_dest(&cinfo, &mem, &mem_size);
cinfo.image_width = width; /* image width and height, in pixels */
cinfo.image_height = height;
cinfo.arith_code = TRUE;
#ifdef JCS_EXTENSIONS
/* The Turbo JPEG extentions allows us to use the Cairo surface
* (BRGx) as input without converting it */
cinfo.input_components = 4;
cinfo.in_color_space = JCS_EXT_BGRX;
#else
/* Standard JPEG supports RGB as input so we will have to convert
* the contents of the Cairo surface from (BRGx) to RGB */
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;
/* Create a buffer for the write scan line which is where we will
* put the converted pixels (BRGx -> RGB) */
int write_stride = cinfo.image_width * cinfo.input_components;
unsigned char *scanline_data = malloc(write_stride);
memset(scanline_data, 0, write_stride);
#endif
/* Initialize the JPEG compressor */
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
jpeg_start_compress(&cinfo, TRUE);
JSAMPROW row_pointer[1]; /* pointer to a single row */
/* Write scanlines to be used in JPEG compression */
while (cinfo.next_scanline < cinfo.image_height) {
int row_offset = stride * cinfo.next_scanline;
#ifdef JCS_EXTENSIONS
/* In Turbo JPEG we can use the raw BGRx scanline */
row_pointer[0] = &data[row_offset];
#else
/* For standard JOEG libraries we have to convert the
* scanline from 24 bit (4 byte) BGRx to 24 bit (3 byte) RGB */
unsigned char *inptr = data + row_offset;
unsigned char *outptr = scanline_data;
for (int x = 0; x < width; ++x) {
outptr[2] = *inptr++; /* B */
outptr[1] = *inptr++; /* G */
outptr[0] = *inptr++; /* R */
inptr++; /* skip the upper byte (x/A) */
outptr += 3;
}
row_pointer[0] = scanline_data;
#endif
jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
#ifndef JCS_EXTENSIONS
free(scanline_data);
#endif
/* Finalize compression */
jpeg_finish_compress(&cinfo);
int base64_length = (mem_size + 2) / 3 * 4;
/* Write length and data */
if (guac_socket_write_int(socket, base64_length)
|| guac_socket_write_string(socket, ".")
|| guac_socket_write_base64(socket, mem, mem_size)
|| guac_socket_flush_base64(socket)) {
/* Something failed. Clean up and return error code. */
jpeg_destroy_compress(&cinfo);
free(mem);
return -1;
}
/* Clean up */
jpeg_destroy_compress(&cinfo);
free(mem);
return 0;
}
/* PNG output formatting */
typedef struct __guac_socket_write_png_data {
guac_socket* socket;
char* buffer;
int buffer_size;
int data_size;
} __guac_socket_write_png_data;
cairo_status_t __guac_socket_write_png_cairo(void* closure, const unsigned char* data, unsigned int length) {
__guac_socket_write_png_data* png_data = (__guac_socket_write_png_data*) closure;
/* Calculate next buffer size */
int next_size = png_data->data_size + length;
/* If need resizing, double buffer size until big enough */
if (next_size > png_data->buffer_size) {
char* new_buffer;
do {
png_data->buffer_size <<= 1;
} while (next_size > png_data->buffer_size);
/* Resize buffer */
new_buffer = realloc(png_data->buffer, png_data->buffer_size);
png_data->buffer = new_buffer;
}
/* Append data to buffer */
memcpy(png_data->buffer + png_data->data_size, data, length);
png_data->data_size += length;
return CAIRO_STATUS_SUCCESS;
}
int __guac_socket_write_length_png_cairo(guac_socket* socket, cairo_surface_t* surface) {
__guac_socket_write_png_data png_data;
int base64_length;
/* Write surface */
png_data.socket = socket;
png_data.buffer_size = 8192;
png_data.buffer = malloc(png_data.buffer_size);
png_data.data_size = 0;
if (cairo_surface_write_to_png_stream(surface, __guac_socket_write_png_cairo, &png_data) != CAIRO_STATUS_SUCCESS) {
guac_error = GUAC_STATUS_INTERNAL_ERROR;
guac_error_message = "Cairo PNG backend failed";
return -1;
}
base64_length = (png_data.data_size + 2) / 3 * 4;
/* Write length and data */
if (
guac_socket_write_int(socket, base64_length)
|| guac_socket_write_string(socket, ".")
|| guac_socket_write_base64(socket, png_data.buffer, png_data.data_size)
|| guac_socket_flush_base64(socket)) {
free(png_data.buffer);
return -1;
}
free(png_data.buffer);
return 0;
}
void __guac_socket_write_png(png_structp png,
png_bytep data, png_size_t length) {
/* Get png buffer structure */
__guac_socket_write_png_data* png_data;
#ifdef HAVE_PNG_GET_IO_PTR
png_data = (__guac_socket_write_png_data*) png_get_io_ptr(png);
#else
png_data = (__guac_socket_write_png_data*) png->io_ptr;
#endif
/* Calculate next buffer size */
int next_size = png_data->data_size + length;
/* If need resizing, double buffer size until big enough */
if (next_size > png_data->buffer_size) {
char* new_buffer;
do {
png_data->buffer_size <<= 1;
} while (next_size > png_data->buffer_size);
/* Resize buffer */
new_buffer = realloc(png_data->buffer, png_data->buffer_size);
png_data->buffer = new_buffer;
}
/* Append data to buffer */
memcpy(png_data->buffer + png_data->data_size, data, length);
png_data->data_size += length;
}
void __guac_socket_flush_png(png_structp png) {
/* Dummy function */
}
int __guac_socket_write_length_png(guac_socket* socket, cairo_surface_t* surface) {
png_structp png;
png_infop png_info;
png_byte** png_rows;
int bpp;
int x, y;
__guac_socket_write_png_data png_data;
int base64_length;
/* Get image surface properties and data */
cairo_format_t format = cairo_image_surface_get_format(surface);
int width = cairo_image_surface_get_width(surface);
int height = cairo_image_surface_get_height(surface);
int stride = cairo_image_surface_get_stride(surface);
unsigned char* data = cairo_image_surface_get_data(surface);
/* If not RGB24, use Cairo PNG writer */
if (format != CAIRO_FORMAT_RGB24 || data == NULL)
return __guac_socket_write_length_png_cairo(socket, surface);
/* Flush pending operations to surface */
cairo_surface_flush(surface);
/* Attempt to build palette */
guac_palette* palette = guac_palette_alloc(surface);
/* If not possible, resort to Cairo PNG writer */
if (palette == NULL)
return __guac_socket_write_length_png_cairo(socket, surface);
/* Calculate BPP from palette size */
if (palette->size <= 2) bpp = 1;
else if (palette->size <= 4) bpp = 2;
else if (palette->size <= 16) bpp = 4;
else bpp = 8;
/* Set up PNG writer */
png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png) {
guac_error = GUAC_STATUS_INTERNAL_ERROR;
guac_error_message = "libpng failed to create write structure";
return -1;
}
png_info = png_create_info_struct(png);
if (!png_info) {
png_destroy_write_struct(&png, NULL);
guac_error = GUAC_STATUS_INTERNAL_ERROR;
guac_error_message = "libpng failed to create info structure";
return -1;
}
/* Set error handler */
if (setjmp(png_jmpbuf(png))) {
png_destroy_write_struct(&png, &png_info);
guac_error = GUAC_STATUS_IO_ERROR;
guac_error_message = "libpng output error";
return -1;
}
/* Set up buffer structure */
png_data.socket = socket;
png_data.buffer_size = 8192;
png_data.buffer = malloc(png_data.buffer_size);
png_data.data_size = 0;
/* Set up writer */
png_set_write_fn(png, &png_data,
__guac_socket_write_png,
__guac_socket_flush_png);
/* Copy data from surface into PNG data */
png_rows = (png_byte**) malloc(sizeof(png_byte*) * height);
for (y=0; y<height; y++) {
/* Allocate new PNG row */
png_byte* row = (png_byte*) malloc(sizeof(png_byte) * width);
png_rows[y] = row;
/* Copy data from surface into current row */
for (x=0; x<width; x++) {
/* Get pixel color */
int color = ((uint32_t*) data)[x] & 0xFFFFFF;
/* Set index in row */
row[x] = guac_palette_find(palette, color);
}
/* Advance to next data row */
data += stride;
}
/* Write image info */
png_set_IHDR(
png,
png_info,
width,
height,
bpp,
PNG_COLOR_TYPE_PALETTE,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT
);
/* Write palette */
png_set_PLTE(png, png_info, palette->colors, palette->size);
/* Write image */
png_set_rows(png, png_info, png_rows);
png_write_png(png, png_info, PNG_TRANSFORM_PACKING, NULL);
/* Finish write */
png_destroy_write_struct(&png, &png_info);
/* Free palette */
guac_palette_free(palette);
/* Free PNG data */
for (y=0; y<height; y++)
free(png_rows[y]);
free(png_rows);
base64_length = (png_data.data_size + 2) / 3 * 4;
/* Write length and data */
if (
guac_socket_write_int(socket, base64_length)
|| guac_socket_write_string(socket, ".")
|| guac_socket_write_base64(socket, png_data.buffer, png_data.data_size)
|| guac_socket_flush_base64(socket)) {
free(png_data.buffer);
return -1;
}
free(png_data.buffer);
return 0;
}
/* Protocol functions */
int guac_protocol_send_ack(guac_socket* socket, guac_stream* stream,
const char* error, guac_protocol_status status) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.ack,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, error)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, status)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
static int __guac_protocol_send_args(guac_socket* socket, const char** args) {
int i;
if (guac_socket_write_string(socket, "4.args")) return -1;
for (i=0; args[i] != NULL; i++) {
if (guac_socket_write_string(socket, ","))
return -1;
if (__guac_socket_write_length_string(socket, args[i]))
return -1;
}
return guac_socket_write_string(socket, ";");
}
int guac_protocol_send_args(guac_socket* socket, const char** args) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val = __guac_protocol_send_args(socket, args);
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_arc(guac_socket* socket, const guac_layer* layer,
int x, int y, int radius, double startAngle, double endAngle,
int negative) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.arc,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, radius)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, startAngle)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, endAngle)
|| guac_socket_write_string(socket, ",")
|| guac_socket_write_string(socket, negative ? "1.1" : "1.0")
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_audio(guac_socket* socket, const guac_stream* stream,
int channel, const char* mimetype, double duration) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.audio,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, channel)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, mimetype)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, duration)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_blob(guac_socket* socket, const guac_stream* stream,
void* data, int count) {
int base64_length = (count + 2) / 3 * 4;
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.blob,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| guac_socket_write_int(socket, base64_length)
|| guac_socket_write_string(socket, ".")
|| guac_socket_write_base64(socket, data, count)
|| guac_socket_flush_base64(socket)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_body(guac_socket* socket, const guac_object* object,
const guac_stream* stream, const char* mimetype, const char* name) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.body,")
|| __guac_socket_write_length_int(socket, object->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, mimetype)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, name)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_cfill(guac_socket* socket,
guac_composite_mode mode, const guac_layer* layer,
int r, int g, int b, int a) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.cfill,")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, r)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, g)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, b)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, a)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_close(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.close,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
static int __guac_protocol_send_connect(guac_socket* socket, const char** args) {
int i;
if (guac_socket_write_string(socket, "7.connect")) return -1;
for (i=0; args[i] != NULL; i++) {
if (guac_socket_write_string(socket, ","))
return -1;
if (__guac_socket_write_length_string(socket, args[i]))
return -1;
}
return guac_socket_write_string(socket, ";");
}
int guac_protocol_send_connect(guac_socket* socket, const char** args) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val = __guac_protocol_send_connect(socket, args);
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_clip(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.clip,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_clipboard(guac_socket* socket, const guac_stream* stream,
const char* mimetype) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "9.clipboard,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, mimetype)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_copy(guac_socket* socket,
const guac_layer* srcl, int srcx, int srcy, int w, int h,
guac_composite_mode mode, const guac_layer* dstl, int dstx, int dsty) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.copy,")
|| __guac_socket_write_length_int(socket, srcl->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcx)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcy)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, w)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, h)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, dstl->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, dstx)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, dsty)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_cstroke(guac_socket* socket,
guac_composite_mode mode, const guac_layer* layer,
guac_line_cap_style cap, guac_line_join_style join, int thickness,
int r, int g, int b, int a) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "7.cstroke,")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, cap)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, join)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, thickness)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, r)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, g)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, b)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, a)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_cursor(guac_socket* socket, int x, int y,
const guac_layer* srcl, int srcx, int srcy, int w, int h) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "6.cursor,")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcl->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcx)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcy)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, w)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, h)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_curve(guac_socket* socket, const guac_layer* layer,
int cp1x, int cp1y, int cp2x, int cp2y, int x, int y) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.curve,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, cp1x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, cp1y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, cp2x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, cp2y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_disconnect(guac_socket* socket) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val = guac_socket_write_string(socket, "10.disconnect;");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_dispose(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "7.dispose,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_distort(guac_socket* socket, const guac_layer* layer,
double a, double b, double c,
double d, double e, double f) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "7.distort,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, a)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, b)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, c)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, d)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, e)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, f)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_end(guac_socket* socket, const guac_stream* stream) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.end,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_error(guac_socket* socket, const char* error,
guac_protocol_status status) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.error,")
|| __guac_socket_write_length_string(socket, error)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, status)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int vguac_protocol_send_log(guac_socket* socket, const char* format,
va_list args) {
int ret_val;
/* Copy log message into buffer */
char message[4096];
vsnprintf(message, sizeof(message), format, args);
/* Log to instruction */
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.log,")
|| __guac_socket_write_length_string(socket, message)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_log(guac_socket* socket, const char* format, ...) {
int ret_val;
va_list args;
va_start(args, format);
ret_val = vguac_protocol_send_log(socket, format, args);
va_end(args);
return ret_val;
}
int guac_protocol_send_file(guac_socket* socket, const guac_stream* stream,
const char* mimetype, const char* name) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.file,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, mimetype)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, name)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_filesystem(guac_socket* socket,
const guac_object* object, const char* name) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "10.filesystem,")
|| __guac_socket_write_length_int(socket, object->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, name)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_identity(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "8.identity,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_lfill(guac_socket* socket,
guac_composite_mode mode, const guac_layer* layer,
const guac_layer* srcl) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.lfill,")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcl->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_line(guac_socket* socket, const guac_layer* layer,
int x, int y) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.line,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_lstroke(guac_socket* socket,
guac_composite_mode mode, const guac_layer* layer,
guac_line_cap_style cap, guac_line_join_style join, int thickness,
const guac_layer* srcl) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "7.lstroke,")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, cap)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, join)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, thickness)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcl->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_move(guac_socket* socket, const guac_layer* layer,
const guac_layer* parent, int x, int y, int z) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.move,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, parent->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, z)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_name(guac_socket* socket, const char* name) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.name,")
|| __guac_socket_write_length_string(socket, name)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_nest(guac_socket* socket, int index,
const char* data) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.nest,")
|| __guac_socket_write_length_int(socket, index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, data)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_nop(guac_socket* socket) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val = guac_socket_write_string(socket, "3.nop;");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_pipe(guac_socket* socket, const guac_stream* stream,
const char* mimetype, const char* name) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.pipe,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, mimetype)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, name)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_jpeg(guac_socket* socket, guac_composite_mode mode,
const guac_layer* layer, int x, int y, cairo_surface_t* surface,
int quality) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.jpeg,")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_jpeg(socket, surface, quality)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_png(guac_socket* socket, guac_composite_mode mode,
const guac_layer* layer, int x, int y, cairo_surface_t* surface) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.png,")
|| __guac_socket_write_length_int(socket, mode)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_png(socket, surface)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_pop(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.pop,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_push(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.push,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_ready(guac_socket* socket, const char* id) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.ready,")
|| __guac_socket_write_length_string(socket, id)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_rect(guac_socket* socket,
const guac_layer* layer, int x, int y, int width, int height) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.rect,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, width)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, height)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_reset(guac_socket* socket, const guac_layer* layer) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.reset,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_set(guac_socket* socket, const guac_layer* layer,
const char* name, const char* value) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "3.set,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, name)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, value)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_select(guac_socket* socket, const char* protocol) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "6.select,")
|| __guac_socket_write_length_string(socket, protocol)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_shade(guac_socket* socket, const guac_layer* layer,
int a) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.shade,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, a)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_size(guac_socket* socket, const guac_layer* layer,
int w, int h) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.size,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, w)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, h)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_start(guac_socket* socket, const guac_layer* layer,
int x, int y) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.start,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, x)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, y)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_sync(guac_socket* socket, guac_timestamp timestamp) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "4.sync,")
|| __guac_socket_write_length_int(socket, timestamp)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_transfer(guac_socket* socket,
const guac_layer* srcl, int srcx, int srcy, int w, int h,
guac_transfer_function fn, const guac_layer* dstl, int dstx, int dsty) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "8.transfer,")
|| __guac_socket_write_length_int(socket, srcl->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcx)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, srcy)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, w)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, h)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, fn)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, dstl->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, dstx)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, dsty)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_transform(guac_socket* socket, const guac_layer* layer,
double a, double b, double c,
double d, double e, double f) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "9.transform,")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, a)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, b)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, c)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, d)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, e)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, f)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_undefine(guac_socket* socket,
const guac_object* object) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "8.undefine,")
|| __guac_socket_write_length_int(socket, object->index)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
int guac_protocol_send_video(guac_socket* socket, const guac_stream* stream,
const guac_layer* layer, const char* mimetype, double duration) {
int ret_val;
guac_socket_instruction_begin(socket);
ret_val =
guac_socket_write_string(socket, "5.video,")
|| __guac_socket_write_length_int(socket, stream->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_int(socket, layer->index)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_string(socket, mimetype)
|| guac_socket_write_string(socket, ",")
|| __guac_socket_write_length_double(socket, duration)
|| guac_socket_write_string(socket, ";");
guac_socket_instruction_end(socket);
return ret_val;
}
/**
* Returns the value of a single base64 character.
*/
static int __guac_base64_value(char c) {
if (c >= 'A' && c <= 'Z')
return c - 'A';
if (c >= 'a' && c <= 'z')
return c - 'a' + 26;
if (c >= '0' && c <= '9')
return c - '0' + 52;
if (c == '+')
return 62;
if (c == '/')
return 63;
return 0;
}
int guac_protocol_decode_base64(char* base64) {
char* input = base64;
char* output = base64;
int length = 0;
int bits_read = 0;
int value = 0;
char current;
/* For all characters in string */
while ((current = *(input++)) != 0) {
/* If we've reached padding, then we're done */
if (current == '=')
break;
/* Otherwise, shift on the latest 6 bits */
value = (value << 6) | __guac_base64_value(current);
bits_read += 6;
/* If we have at least one byte, write out the latest whole byte */
if (bits_read >= 8) {
*(output++) = (value >> (bits_read % 8)) & 0xFF;
bits_read -= 8;
length++;
}
}
/* Return number of bytes written */
return length;
}