diff --git a/libguac/include/protocol.h b/libguac/include/protocol.h
index c4722b75..3ad1dc63 100644
--- a/libguac/include/protocol.h
+++ b/libguac/include/protocol.h
@@ -348,10 +348,12 @@ int guac_protocol_send_connect(guac_socket* socket, const char** args);
  * @param socket The guac_socket connection to use.
  * @param resource The resource associated with the data being sent.
  * @param data The data to send.
+ * @param size The number of bytes from the beginning of the given buffer
+ *             of data to send.
  * @return Zero on success, non-zero on error.
  */
 int guac_protocol_send_data(guac_socket* socket, guac_resource* resource,
-        const unsigned char* data);
+        const unsigned char* data, size_t size);
 
 /**
  * Sends a disconnect instruction over the given guac_socket connection.
diff --git a/libguac/src/protocol.c b/libguac/src/protocol.c
index ec72be25..3eddce77 100644
--- a/libguac/src/protocol.c
+++ b/libguac/src/protocol.c
@@ -905,6 +905,26 @@ int guac_protocol_send_curve(guac_socket* socket, const guac_layer* layer,
 }
 
 
+int guac_protocol_send_data(guac_socket* socket, guac_resource* resource,
+        const unsigned char* data, size_t size) {
+
+    /* Calculate base64 length */
+    int base64_length = (size + 2) / 3 * 4;
+
+    /* Send base64-encoded data */
+    return
+           guac_socket_write_string(socket, "4.data,")
+        || __guac_socket_write_length_int(socket, resource->index)
+        || guac_socket_write_string(socket, ",")
+        || guac_socket_write_int(socket, base64_length)
+        || guac_socket_write_string(socket, ".")
+        || guac_socket_write_base64(socket, data, size)
+        || guac_socket_flush_base64(socket)
+        || guac_socket_write_string(socket, ";");
+
+}
+
+
 int guac_protocol_send_disconnect(guac_socket* socket) {
     return guac_socket_write_string(socket, "10.disconnect;");
 }
@@ -944,6 +964,15 @@ int guac_protocol_send_distort(guac_socket* socket, const guac_layer* layer,
 }
 
 
+int guac_protocol_send_end(guac_socket* socket, guac_resource* resource) {
+
+    return
+           guac_socket_write_string(socket, "3.end,")
+        || __guac_socket_write_length_int(socket, resource->index)
+        || guac_socket_write_string(socket, ";");
+}
+
+
 int guac_protocol_send_error(guac_socket* socket, const char* error) {
 
     return
@@ -1114,6 +1143,39 @@ int guac_protocol_send_reset(guac_socket* socket, const guac_layer* layer) {
 }
 
 
+int guac_protocol_send_resource(guac_socket* socket, guac_resource* resource,
+        const char* uri, const char** mimetypes) {
+
+    /* Write resource header */
+    if (
+           guac_socket_write_string(socket, "8.resource,")
+        || __guac_socket_write_length_int(socket, resource->index)
+        || guac_socket_write_string(socket, ",")
+        || __guac_socket_write_length_string(socket, uri)
+       )
+        return -1;
+
+    /* Write each mimetype */
+    while (*mimetypes != NULL) {
+
+        /* Write mimetype */
+        if (  
+               guac_socket_write_string(socket, ",")
+            || __guac_socket_write_length_string(socket, *mimetypes)
+           )
+            return -1;
+
+        /* Next mimetype */
+        mimetypes++;
+
+    }
+
+    /* Finish instruction */
+    return  guac_socket_write_string(socket, ";");
+
+}
+
+
 int guac_protocol_send_set(guac_socket* socket, const guac_layer* layer,
         const char* name, const char* value) {