1 files changed, 89 insertions, 0 deletions
diff --git a/src/lib/protocols/profinet_io.c b/src/lib/protocols/profinet_io.c
new file mode 100644
index 000000000..425a9374b
--- /dev/null
+++ b/src/lib/protocols/profinet_io.c
@@ -0,0 +1,89 @@
+/*
+ * profinet_io.c
+ *
+ * Copyright (C) 2023 - ntop.org
+ * Copyright (C) 2023 - V.G <jacendi@protonmail.com>
+ *
+ * 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_PROFINET_IO
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+static void ndpi_int_profinet_io_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
+                                                struct ndpi_flow_struct *flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found PROFINET/IO\n");
+  ndpi_set_detected_protocol(ndpi_struct, flow,
+                             NDPI_PROTOCOL_PROFINET_IO, NDPI_PROTOCOL_DCERPC,
+                             NDPI_CONFIDENCE_DPI);
+}
+
+static void ndpi_search_profinet_io(struct ndpi_detection_module_struct *ndpi_struct,
+                                    struct ndpi_flow_struct *flow)
+{
+  struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
+
+  NDPI_LOG_DBG(ndpi_struct, "searching PROFINET/IO\n");
+
+  /* PROFINET/IO is based on connectionless DCE/RPC */
+  if ((flow->detected_protocol_stack[0] == NDPI_PROTOCOL_DCERPC) &&
+      (packet->payload_packet_len > 43))
+  {
+    u_int8_t byte_order = (packet->payload[4] >> 4) & 0xF;
+    u_int32_t time_low = 0;
+    u_int16_t time_mid = 0;
+    u_int16_t time_hi_and_version = 0;
+
+    if (byte_order == 0) { /* Big Endian */
+      time_low = ntohl(get_u_int32_t(packet->payload, 8));
+      time_mid = ntohs(get_u_int16_t(packet->payload, 12));
+      time_hi_and_version = ntohs(get_u_int16_t(packet->payload, 14));
+    } else { /* Little Endian */
+      time_low = le32toh(get_u_int32_t(packet->payload, 8));
+      time_mid = le16toh(get_u_int16_t(packet->payload, 12));
+      time_hi_and_version = le16toh(get_u_int16_t(packet->payload, 14));
+    }
+
+    if ((time_low == 0xDEA00000) && (time_mid == 0x6C97) && 
+        (time_hi_and_version == 0x11D1))
+    {
+      ndpi_int_profinet_io_add_connection(ndpi_struct, flow);
+      return;
+    }
+  }
+
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+void init_profinet_io_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("PROFINET_IO", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_PROFINET_IO,
+                                      ndpi_search_profinet_io,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK
+                                     );
+
+  *id += 1;
+}