153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is libguac.
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*
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* The Initial Developer of the Original Code is
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* Michael Jumper.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* David PHAM-VAN <d.pham-van@ulteo.com> Ulteo SAS - http://www.ulteo.com
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <inttypes.h>
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#ifdef __MINGW32__
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#include <winsock2.h>
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#else
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#include <sys/select.h>
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#endif
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#include <time.h>
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#include <sys/time.h>
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#include "socket.h"
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#include "protocol.h"
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#include "error.h"
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#include "unicode.h"
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#define GUAC_SOCKET_NEST_BUFFER_SIZE 8192
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typedef struct __guac_socket_nest_data {
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guac_socket* parent;
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char buffer[GUAC_SOCKET_NEST_BUFFER_SIZE];
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int index;
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} __guac_socket_nest_data;
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ssize_t __guac_socket_nest_write_handler(guac_socket* socket,
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void* buf, size_t count) {
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__guac_socket_nest_data* data = (__guac_socket_nest_data*) socket->data;
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unsigned char* source = (unsigned char*) buf;
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/* Current location in destination buffer during copy */
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char* current = data->buffer;
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/* Number of bytes remaining in source buffer */
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int remaining = count;
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/* If we can't actually store that many bytes, reduce number of bytes
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* expected to be written */
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if (remaining > GUAC_SOCKET_NEST_BUFFER_SIZE)
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remaining = GUAC_SOCKET_NEST_BUFFER_SIZE;
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/* Current offset within destination buffer */
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int offset;
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/* Number of characters before start of next character */
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int skip = 0;
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/* Copy UTF-8 characters into buffer */
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for (offset = 0; offset < GUAC_SOCKET_NEST_BUFFER_SIZE; offset++) {
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/* Get next byte */
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unsigned char c = *source;
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remaining--;
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/* If skipping, then skip */
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if (skip > 0) skip--;
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/* Otherwise, determine next skip value, and increment length */
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else {
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/* Determine skip value (size in bytes of rest of character) */
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skip = guac_utf8_charsize(c) - 1;
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/* If not enough bytes to complete character, break */
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if (skip > remaining)
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break;
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}
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/* Store byte */
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*current = c;
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/* Advance to next character */
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source++;
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current++;
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}
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/* Append null-terminator */
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*current = 0;
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/* Send nest instruction containing read UTF-8 segment */
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guac_protocol_send_nest(data->parent, data->index, data->buffer);
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/* Return number of bytes actually written */
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return offset;
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}
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guac_socket* guac_socket_nest(guac_socket* parent, int index) {
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/* Allocate socket and associated data */
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guac_socket* socket = guac_socket_alloc();
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__guac_socket_nest_data* data = malloc(sizeof(__guac_socket_nest_data));
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/* Store file descriptor as socket data */
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data->parent = parent;
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socket->data = data;
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/* Set write handler */
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socket->write_handler = __guac_socket_nest_write_handler;
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return socket;
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}
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