✨ feat(integration decoders): http and glimpse_detector

compile pass, todo test

decoders/glimpse_detector/libprotoident/tcp/lpi_transocks.cc

@@ -0,0 +1,100 @@
+/*
+ *
+ * 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"
+
+/* Chinese VPN for accessing mainland content */
+
+static inline bool match_ts_23(uint32_t payload, uint32_t len) {
+
+        if (len == 23 && MATCH(payload, 0x00, 0x00, 0x00, 0x00)) {
+                return true;
+        }
+
+        return false;
+}
+
+static inline bool match_ts_reply(uint32_t payload, uint32_t len) {
+
+        /* Payload is random, but we could add rules to return false
+         * if the payload is 00000000 or ffffffff (or any other clearly
+         * intentional pattern), if this is generating FPs.
+         */
+
+        /* Lower path MTUs would affect this number, but let's concentrate
+         * on getting the lowest hanging fruit for now.
+         */
+        if (len == 1460 || len == 1406 || len == 1356) {
+                return true;
+        }
+
+        /* 503 is also a common length? also seen 501 and 507 occasionally.. */
+        if (len == 503) {
+                return true;
+        }
+
+        /* Starting to see a bit of variation in reply sizes now :/ */
+        if (len >= 678 && len <= 688) {
+                return true;
+        }
+
+        return false;
+
+}
+
+static inline bool match_transocks(lpi_data_t *data, lpi_module_t *mod UNUSED) {
+
+        if (match_ts_23(data->payload[0], data->payload_len[0])) {
+                if (match_ts_reply(data->payload[1], data->payload_len[1])) {
+                        return true;
+                }
+        }
+
+        if (match_ts_23(data->payload[0], data->payload_len[0])) {
+                if (match_ts_reply(data->payload[1], data->payload_len[1])) {
+                        return true;
+                }
+        }
+
+	return false;
+}
+
+static lpi_module_t lpi_transocks = {
+	LPI_PROTO_TRANSOCKS,
+	LPI_CATEGORY_TUNNELLING,
+	"Transocks",
+	240,
+	match_transocks
+};
+
+void register_transocks(LPIModuleMap *mod_map) {
+	register_protocol(&lpi_transocks, mod_map);
+}
+