✨ feat(integration decoders): http and glimpse_detector

compile pass, todo test

decoders/glimpse_detector/libprotoident/tcp/lpi_rdp.cc

@@ -0,0 +1,110 @@
+/*
+ *
+ * Copyright (c) 2011-2016 The University of Waikato, Hamilton, New Zealand.
+ * All rights reserved.
+ *
+ * This file is part of libprotoident.
+ *
+ * This code has been developed by the University of Waikato WAND
+ * research group. For further information please see http://www.wand.net.nz/
+ *
+ * libprotoident is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libprotoident is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ */
+
+#include <string.h>
+
+#include "libprotoident.h"
+#include "proto_manager.h"
+#include "proto_common.h"
+
+static inline bool match_rdp_sizes(lpi_data_t *data) {
+
+	/* This should match the common packet sizes we see for genuine
+	 * RDP traffic */
+
+	if (data->payload_len[0] == 11 || data->payload_len[0] == 19) {
+		if (data->payload_len[1] == 19)
+			return true;
+		if (data->payload_len[1] >= 30 && data->payload_len[1] <= 47)
+			return true;
+	}
+
+	if (data->payload_len[1] == 11 || data->payload_len[1] == 19) {
+		if (data->payload_len[0] == 19)
+			return true;
+		if (data->payload_len[0] >= 30 && data->payload_len[0] <= 47)
+			return true;
+	}
+
+	return false;
+}
+
+static inline bool match_rdp_port(lpi_data_t *data) {
+
+	/* To try and avoid confusing RDP with other protocols that rely
+	 * on TPKT, most notably H.323, I've had to add a port requirement
+	 * here */
+	 
+	if (data->server_port == 3389 || data->client_port == 3389)
+		return true;
+	return false;
+}
+
+	
+
+static bool match_rdp(lpi_data_t *data, lpi_module_t *mod UNUSED) {
+
+        /* RDP is transported via TPKT */
+	if ((data->payload_len[0]!= 0) && !match_tpkt(data->payload[0], data->payload_len[0]))
+		return false;
+	if ((data->payload_len[1]!= 0) && !match_tpkt(data->payload[1], data->payload_len[1]))
+		return false;
+	
+	if (match_rdp_port(data))
+		return true;
+	if (match_rdp_sizes(data))
+		return true;
+	
+
+#if 0
+	if (match_tpkt(data->payload[0], data->payload_len[0])) {
+		if (match_tpkt(data->payload[1], data->payload_len[1]))
+			return true;
+		
+		/* Some RDP responses seem to be encrypted - not sure if this
+		 * payload length is common to all flows */
+		if (data->payload_len[1] == 309) 
+			return true;
+	}
+	if (match_tpkt(data->payload[1], data->payload_len[1])) {
+		if (data->payload_len[0] == 309) 
+			return true;
+	}
+#endif
+	return false;
+}
+
+static lpi_module_t lpi_rdp = {
+	LPI_PROTO_RDP,
+	LPI_CATEGORY_REMOTE,
+	"RDP",
+	4, /*  Moving this to 4 purely on gut feeling */
+	match_rdp
+};
+
+void register_rdp(LPIModuleMap *mod_map) {
+	register_protocol(&lpi_rdp, mod_map);
+}