Add nested protocol socket.

libguac/src/Makefile.am

@@ -69,6 +69,7 @@ libguac_la_SOURCES =  \
 	protocol.c        \
 	socket.c          \
 	socket-fd.c       \
+	socket-nest.c     \
 	timestamp.c       \
 	unicode.c
 

libguac/src/socket-nest.c

@@ -0,0 +1,152 @@
+
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is libguac.
+ *
+ * The Initial Developer of the Original Code is
+ * Michael Jumper.
+ * Portions created by the Initial Developer are Copyright (C) 2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * David PHAM-VAN <d.pham-van@ulteo.com> Ulteo SAS - http://www.ulteo.com
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <inttypes.h>
+
+#ifdef __MINGW32__
+#include <winsock2.h>
+#else
+#include <sys/select.h>
+#endif
+
+#include <time.h>
+#include <sys/time.h>
+
+#include "socket.h"
+#include "protocol.h"
+#include "error.h"
+#include "unicode.h"
+
+#define GUAC_SOCKET_NEST_BUFFER_SIZE 8192
+
+typedef struct guac_socket_nest_data {
+
+    guac_socket* parent;
+    char buffer[GUAC_SOCKET_NEST_BUFFER_SIZE];
+    int index;
+
+} guac_socket_nest_data;
+
+ssize_t __guac_socket_nest_write_handler(guac_socket* socket,
+        void* buf, size_t count) {
+
+    guac_socket_nest_data* data = (guac_socket_nest_data*) socket->data;
+    unsigned char* source = (unsigned char*) buf;
+
+    /* Current location in destination buffer during copy */
+    char* current = data->buffer;
+
+    /* Number of bytes remaining in source buffer */
+    int remaining = count;
+
+    /* If we can't actually store that many bytes, reduce number of bytes
+     * expected to be written */
+    if (remaining > GUAC_SOCKET_NEST_BUFFER_SIZE)
+        remaining = GUAC_SOCKET_NEST_BUFFER_SIZE;
+
+    /* Current offset within destination buffer */
+    int offset;
+
+    /* Number of characters before start of next character */
+    int skip = 0;
+
+    /* Copy UTF-8 characters into buffer */
+    for (offset = 0; offset < GUAC_SOCKET_NEST_BUFFER_SIZE; offset++) {
+
+        /* Get next byte */
+        unsigned char c = *source;
+        remaining--;
+
+        /* If skipping, then skip */
+        if (skip > 0) skip--;
+
+        /* Otherwise, determine next skip value, and increment length */
+        else {
+
+            /* Determine skip value (size in bytes of rest of character) */
+            skip = guac_utf8_charsize(c) - 1;
+
+            /* If not enough bytes to complete character, break */
+            if (skip > remaining)
+                break;
+
+        }
+
+        /* Store byte */
+        *current = c;
+
+        /* Advance to next character */
+        source++;
+        current++;
+
+    }
+
+    /* Append null-terminator */
+    *current = 0;
+
+    /* Send nest instruction containing read UTF-8 segment */
+    guac_protocol_send_nest(data->parent, data->index, data->buffer);
+
+    /* Return number of bytes actually written */
+    return offset;
+
+}
+
+guac_socket* guac_socket_nest(guac_socket* parent, int index) {
+
+    /* Allocate socket and associated data */
+    guac_socket* socket = guac_socket_alloc();
+    guac_socket_nest_data* data = malloc(sizeof(guac_socket_nest_data));
+
+    /* Store file descriptor as socket data */
+    data->parent = parent;
+    socket->data = data;
+
+    /* Set write handler */
+    socket->write_handler  = __guac_socket_nest_write_handler;
+
+    return socket;
+
+}
+