1 files changed, 73 insertions, 0 deletions
diff --git a/src/lib/protocols/cip.c b/src/lib/protocols/cip.c
new file mode 100644
index 000000000..65dbb9a24
--- /dev/null
+++ b/src/lib/protocols/cip.c
@@ -0,0 +1,73 @@
+/*
+ * cip.c
+ *
+ * Copyright (C) 2018-24 - ntop.org
+ *
+ * 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/>.
+ *
+ */
+
+/* https://en.wikipedia.org/wiki/Common_Industrial_Protocol */
+
+#include "ndpi_protocol_ids.h"
+
+#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_CIP
+
+#define CIP_IO_PORT  2222
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+static void ndpi_search_cip(struct ndpi_detection_module_struct *ndpi_struct,
+			    struct ndpi_flow_struct *flow) {
+  struct ndpi_packet_struct *packet = &ndpi_struct->packet;
+
+  NDPI_LOG_DBG(ndpi_struct, "search cip\n");
+
+  if(packet->udp
+     && (ntohs(packet->udp->source) == CIP_IO_PORT) && (ntohs(packet->udp->dest) == CIP_IO_PORT)
+     && (packet->payload_packet_len >= 12)
+     && (packet->payload_packet_len < 64)
+     && (packet->payload[1] == 0x0)
+     ) {
+    u_int8_t num_items = packet->payload[0], offset = 2;
+
+    while((num_items > 0) && (packet->payload_packet_len > (offset + 4))) {
+      // u_int16_t type_id = *((u_int16_t*)&packet->payload[offset]);
+      u_int16_t lenght = (packet->payload[offset+3] << 8) + packet->payload[offset+2];
+
+      offset += 4 + lenght;
+    }
+
+    if(offset == packet->payload_packet_len) {
+      NDPI_LOG_INFO(ndpi_struct,"found cip\n");
+      ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_CIP, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
+    }
+  } else {
+    /* TODO add TCP dissection */
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+
+void init_cip_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id) {
+  ndpi_set_bitmask_protocol_detection("CIP", ndpi_struct, *id,
+				      NDPI_PROTOCOL_CIP,
+				      ndpi_search_cip,
+				      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+				      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+				      ADD_TO_DETECTION_BITMASK);
+  *id += 1;
+}