GUACAMOLE-600: Add support for setting the VNC connection timeout.

src/protocols/vnc/settings.c

@@ -36,6 +36,7 @@
 const char* GUAC_VNC_CLIENT_ARGS[] = {
     "hostname",
     "port",
+    "timeout",
     "read-only",
     "encodings",
     GUAC_VNC_ARGV_USERNAME,
@@ -108,6 +109,11 @@ enum VNC_ARGS_IDX {
      */
     IDX_PORT,
 
+    /**
+     * The number of seconds to wait for the connection before timing out.
+     */
+    IDX_TIMEOUT,
+
     /**
      * "true" if this connection should be read-only (user input should be
      * dropped), "false" or blank otherwise.
@@ -405,6 +411,10 @@ guac_vnc_settings* guac_vnc_parse_args(guac_user* user,
         guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
                 IDX_PORT, 0);
 
+    settings->timeout =
+        guac_user_parse_args_int(user, GUAC_VNC_CLIENT_ARGS, argv,
+                IDX_TIMEOUT, GUAC_VNC_DEFAULT_CONNECTION_TIMEOUT);
+
     settings->username =
         guac_user_parse_args_string(user, GUAC_VNC_CLIENT_ARGS, argv,
                 IDX_USERNAME, NULL);

src/protocols/vnc/settings.h

@@ -25,6 +25,11 @@
 
 #include <stdbool.h>
 
+/**
+ * The default number of seconds to wait for a connection before timing out.
+ */
+#define GUAC_VNC_DEFAULT_CONNECTION_TIMEOUT 10
+
 /**
  * The filename to use for the screen recording, if not specified.
  */
@@ -45,6 +50,11 @@ typedef struct guac_vnc_settings {
      */
     int port;
 
+    /**
+     * The number of seconds to wait for the connection before timing out.
+     */
+    int timeout;
+
     /**
      * The username given in the arguments.
      */

src/protocols/vnc/vnc.c

@@ -201,9 +201,10 @@ rfbClient* guac_vnc_get_client(guac_client* client) {
     rfb_client->MallocFrameBuffer = guac_vnc_malloc_framebuffer;
     rfb_client->canHandleNewFBSize = 1;
 
-    /* Set hostname and port */
+    /* Set hostname, port, and timeout */
     rfb_client->serverHost = strdup(vnc_settings->hostname);
     rfb_client->serverPort = vnc_settings->port;
+    rfb_client->connectTimeout = vnc_settings->timeout;
 
 #ifdef ENABLE_VNC_REPEATER
     /* Set repeater parameters if specified */