1 files changed, 91 insertions, 0 deletions
diff --git a/src/lib/protocols/tds.c b/src/lib/protocols/tds.c
new file mode 100644
index 000000000..af97316cd
--- /dev/null
+++ b/src/lib/protocols/tds.c
@@ -0,0 +1,91 @@
+/*
+ * tds.c
+ *
+ * Copyright (C) 2009-2011 by ipoque GmbH
+ * Copyright (C) 2011-15 - ntop.org
+ *
+ * This file is part of nDPI, an open source deep packet inspection
+ * library based on the OpenDPI and PACE technology by ipoque GmbH
+ *
+ * nDPI 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.
+ *
+ * nDPI 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 nDPI.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+
+#include "ndpi_protocols.h"
+#ifdef NDPI_PROTOCOL_TDS
+
+static void ndpi_int_tds_add_connection(struct ndpi_detection_module_struct
+										  *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_TDS, NDPI_REAL_PROTOCOL);
+}
+
+void ndpi_search_tds_tcp(struct ndpi_detection_module_struct
+						   *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+	struct ndpi_packet_struct *packet = &flow->packet;
+	
+//      struct ndpi_id_struct         *src=ndpi_struct->src;
+//      struct ndpi_id_struct         *dst=ndpi_struct->dst;
+
+	if (packet->payload_packet_len > 8
+		&& packet->payload_packet_len < 512
+		&& packet->payload[1] < 0x02
+		&& ntohs(get_u_int16_t(packet->payload, 2)) == packet->payload_packet_len && get_u_int16_t(packet->payload, 4) == 0x0000) {
+
+		if (flow->l4.tcp.tds_stage == 0) {
+			if (packet->payload[0] != 0x02 && packet->payload[0] != 0x07 && packet->payload[0] != 0x12) {
+				goto exclude_tds;
+			} else {
+				flow->l4.tcp.tds_stage = 1 + packet->packet_direction;
+				flow->l4.tcp.tds_login_version = packet->payload[0];
+				return;
+			}
+		} else if (flow->l4.tcp.tds_stage == 2 - packet->packet_direction) {
+			switch (flow->l4.tcp.tds_login_version) {
+			case 0x12:
+				if (packet->payload[0] == 0x04) {
+					flow->l4.tcp.tds_stage = 3 + packet->packet_direction;
+					return;
+				} else {
+					goto exclude_tds;
+				}
+				//TODO: add more cases for other versions
+			default:
+				goto exclude_tds;
+			}
+		} else if (flow->l4.tcp.tds_stage == 4 - packet->packet_direction) {
+			switch (flow->l4.tcp.tds_login_version) {
+			case 0x12:
+				if (packet->payload[0] == 0x12) {
+					NDPI_LOG(NDPI_PROTOCOL_TDS, ndpi_struct, NDPI_LOG_DEBUG, "TDS detected\n");
+					ndpi_int_tds_add_connection(ndpi_struct, flow);
+					return;
+				} else {
+					goto exclude_tds;
+				}
+				//TODO: add more cases for other versions
+			default:
+				goto exclude_tds;
+			}
+		}
+	}
+
+  exclude_tds:
+
+	NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_TDS);
+}
+
+#endif