Added dissector for protocol check_mk

1 files changed, 85 insertions, 0 deletions

diff --git a/src/lib/protocols/checkmk.c b/src/lib/protocols/checkmk.c
new file mode 100755
index 000000000..d407efea5
--- /dev/null
+++ b/src/lib/protocols/checkmk.c
@@ -0,0 +1,85 @@
+/*
+ * checkmk.c
+ *
+ * Copyright (C) 2009-2011 by ipoque GmbH
+ * Copyright (C) 2011-16 - 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_CHECKMK
+
+static void ndpi_int_checkmk_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_CHECKMK, NDPI_PROTOCOL_UNKNOWN);
+}
+
+
+void ndpi_search_checkmk(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct *packet = &flow->packet;
+
+  if (packet->payload_packet_len >= 15) {
+
+    if(packet->payload_packet_len > 128) {
+      /*
+	When we transfer a large data chunk, unless we have observed
+	the initial connection, we need to discard these packets
+	as they are not an indication that this flow is not AFP	
+      */
+      return;
+    }
+
+    /*
+     * this will detect the OpenSession command of the Data Stream Interface (DSI) protocol
+     * which is exclusively used by the Apple Filing Protocol (AFP) on TCP/IP networks
+     */
+
+
+
+  if (packet->payload_packet_len >= 15 && packet->payload_packet_len < 100
+        && memcmp(packet->payload, "<<<check_mk>>>", 14) == 0) {
+
+      NDPI_LOG(NDPI_PROTOCOL_CHECKMK, ndpi_struct, NDPI_LOG_DEBUG, "Check_MK: Flow detected.\n");
+      ndpi_int_checkmk_add_connection(ndpi_struct, flow);
+      return;
+    }
+  }
+
+  NDPI_LOG(NDPI_PROTOCOL_CHECKMK, ndpi_struct, NDPI_LOG_DEBUG, "Check_MK excluded.\n");
+  NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_CHECKMK);
+}
+
+
+void init_checkmk_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
+{
+  ndpi_set_bitmask_protocol_detection("CHECKMK", ndpi_struct, detection_bitmask, *id,
+				      NDPI_PROTOCOL_CHECKMK,
+				      ndpi_search_checkmk,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+  *id += 1;
+}
+
+
+#endif
+