Added IMO dissector

Fixed TLS/UDP detection
Reduced UBNT buffer for saving space

1 files changed, 80 insertions, 0 deletions

diff --git a/src/lib/protocols/imo.c b/src/lib/protocols/imo.c
new file mode 100644
index 000000000..dfc42a39b
--- /dev/null
+++ b/src/lib/protocols/imo.c
@@ -0,0 +1,80 @@
+/*
+ * imo.c
+ *
+ * Copyright (C) 2019 - 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_protocol_ids.h"
+
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_IMO
+
+#include "ndpi_api.h"
+
+static void ndpi_int_imo_add_connection(struct ndpi_detection_module_struct
+					*ndpi_struct, struct ndpi_flow_struct *flow) {
+  ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_IMO, NDPI_PROTOCOL_UNKNOWN);
+}
+
+void ndpi_search_imo(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
+  struct ndpi_packet_struct *packet = &flow->packet;
+
+  NDPI_LOG_DBG(ndpi_struct, "search IMO\n");
+
+  if(packet->payload_packet_len == 1) {
+    /* Two one byte consecutive packets with the same payload */ 
+    if((flow->protos.imo.last_one_byte_pkt == 1)
+       && (flow->protos.imo.last_byte == packet->payload[0]))
+      ndpi_int_imo_add_connection(ndpi_struct, flow);
+    else
+      flow->protos.imo.last_one_byte_pkt = 1, flow->protos.imo.last_byte = packet->payload[0];
+  } else if(((packet->payload_packet_len == 10)
+	 && (packet->payload[0] == 0x09)
+	 && (packet->payload[1] == 0x02))
+     || ((packet->payload_packet_len == 11)
+	 && (packet->payload[0] == 0x00)
+	 && (packet->payload[1] == 0x09)
+	 && (packet->payload[2] == 0x03))
+     || ((packet->payload_packet_len == 1099)
+	 && (packet->payload[0] == 0x88)
+	 && (packet->payload[1] == 0x49)
+	 && (packet->payload[2] == 0x1a)
+	 && (packet->payload[3] == 0x00))) {
+    NDPI_LOG_INFO(ndpi_struct, "found IMO\n");
+    ndpi_int_imo_add_connection(ndpi_struct, flow);
+  } else {
+    if(flow->num_processed_pkts > 7)
+      NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+    else
+      flow->protos.imo.last_one_byte_pkt = 0;
+  }
+}
+
+
+void init_imo_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+			u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask) {
+  ndpi_set_bitmask_protocol_detection("IMO", ndpi_struct, detection_bitmask, *id,
+                                      NDPI_PROTOCOL_IMO,
+                                      ndpi_search_imo,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK);
+  *id += 1;
+}
+