fix and merge mssql and tds in unique dissector mssql_tds due to latest release + minor fixes

1 files changed, 82 insertions, 0 deletions

diff --git a/src/lib/protocols/mssql_tds.c b/src/lib/protocols/mssql_tds.c
new file mode 100644
index 000000000..73dfe29a0
--- /dev/null
+++ b/src/lib/protocols/mssql_tds.c
@@ -0,0 +1,82 @@
+/*
+ * mssql.c
+ *
+ * Copyright (C) 2016 - 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_MSSQL_TDS
+
+struct tds_packet_header {
+  u_int8_t type;
+  u_int8_t status;
+  u_int16_t length;
+  u_int16_t channel;
+  u_int8_t number;
+  u_int8_t window;
+};
+
+static void ndpi_int_mssql_tds_add_connection(struct ndpi_detection_module_struct
+					  *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_MSSQL_TDS, NDPI_PROTOCOL_UNKNOWN);
+}
+
+void ndpi_search_mssql_tds(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+  struct tds_packet_header *h = (struct tds_packet_header*) packet->payload;
+
+  if (packet->payload_packet_len < sizeof(struct tds_packet_header)) {
+    NDPI_LOG(NDPI_PROTOCOL_MSSQL_TDS, ndpi_struct, NDPI_LOG_DEBUG, "exclude mssql_tds\n");
+    NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MSSQL_TDS);
+    return;
+  }
+  
+  if((h->type >= 1 && h->type <= 8) || (h->type >= 14 && h->type <= 18)) {
+    if(h->status == 0x00 || h->status == 0x01 || h->status == 0x02 || h->status == 0x04 || h->status == 0x08 || h->status == 0x09 || h->status == 0x10) {
+      if(ntohs(h->length) == packet->payload_packet_len && h->window == 0x00) {
+	NDPI_LOG(NDPI_PROTOCOL_MSSQL_TDS, ndpi_struct, NDPI_LOG_DEBUG, "found mssql_tds\n");
+	ndpi_int_mssql_tds_add_connection(ndpi_struct, flow);
+	return;
+      }
+    }
+  }
+  
+  NDPI_LOG(NDPI_PROTOCOL_MSSQL, ndpi_struct, NDPI_LOG_DEBUG, "exclude mssql_tds\n");
+  NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_MSSQL_TDS);
+}
+
+
+void init_mssql_tds_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
+{
+  ndpi_set_bitmask_protocol_detection("MsSQL_TDS", ndpi_struct, detection_bitmask, *id,
+				      NDPI_PROTOCOL_MSSQL_TDS,
+				      ndpi_search_mssql_tds,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}
+
+#endif