From 779d9a6e517e742002b1bb096bc4757e37169c4d Mon Sep 17 00:00:00 2001
From: havup <42641299+havup@users.noreply.github.com>
Date: Wed, 25 Mar 2020 19:09:14 +0800
Subject: Add files via upload

---
 src/lib/protocols/s7comm.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/lib/protocols/s7comm.c

(limited to 'src/lib/protocols/s7comm.c')

diff --git a/src/lib/protocols/s7comm.c b/src/lib/protocols/s7comm.c
new file mode 100644
index 000000000..e8f637c97
--- /dev/null
+++ b/src/lib/protocols/s7comm.c
@@ -0,0 +1,58 @@
+/*
+ * ndpi_main.c
+ *
+ * Copyright (C) 2011-20 - 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"
+#include "ndpi_api.h"
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_S7COMM
+#define S7_COMMON_PORT 102
+void ndpi_search_s7comm_tcp(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 S7\n");
+  u_int16_t s7comm_port = htons(S7_COMMON_PORT); 
+  if(packet->tcp) {
+    
+    if((packet->payload[0]==0x03)&&(packet->payload[1]==0x00)&&((packet->tcp->dest == s7comm_port) || (packet->tcp->source == s7comm_port))) {
+      NDPI_LOG_INFO(ndpi_struct, "found S7\n");
+      ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_S7COMM, NDPI_PROTOCOL_UNKNOWN);
+
+      return;
+      
+    }
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+   
+}
+
+void init_s7comm_dissector(struct ndpi_detection_module_struct *ndpi_struct,
+                           u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask) {
+      
+  ndpi_set_bitmask_protocol_detection("S7COMM", ndpi_struct, detection_bitmask, *id,
+                              NDPI_PROTOCOL_S7COMM,
+                              ndpi_search_s7comm_tcp,                            NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD,
+                              SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                              ADD_TO_DETECTION_BITMASK);
+  *id += 1;
+}
+
-- 
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