1 files changed, 113 insertions, 0 deletions
diff --git a/src/lib/protocols/hart-ip.c b/src/lib/protocols/hart-ip.c
new file mode 100644
index 000000000..4120d0888
--- /dev/null
+++ b/src/lib/protocols/hart-ip.c
@@ -0,0 +1,113 @@
+/*
+ * hart-ip.c
+ *
+ * Highway Addressable Remote Transducer over IP
+ * 
+ * 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_HART_IP
+
+#include "ndpi_api.h"
+#include "ndpi_private.h"
+
+struct hart_ip_hdr {
+  u_int8_t version;
+  u_int8_t msg_type;
+  u_int8_t msg_id;
+  u_int8_t status;
+  u_int16_t seq_num;
+  u_int16_t msg_len;
+};
+
+enum hart_ip_msg_type {
+  REQUEST_MSG,
+  RESPONSE_MSG,
+  PUBLISH_MSG,
+  NAK_MSG = 15
+};
+
+enum hart_ip_msg_id {
+  SESSION_INITIATE_ID,
+  SESSION_CLOSE_ID,
+  KEEPALIVE_ID,
+  TOKEN_PASSING_PDU_ID,
+  DIRECT_PDU_ID,
+  READ_AUDIT_LOG_ID
+};
+
+static void ndpi_int_hart_ip_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
+                                            struct ndpi_flow_struct *flow)
+{
+  NDPI_LOG_INFO(ndpi_struct, "found HART-IP\n");
+
+  ndpi_set_detected_protocol(ndpi_struct, flow,
+                             NDPI_PROTOCOL_HART_IP, NDPI_PROTOCOL_UNKNOWN,
+                             NDPI_CONFIDENCE_DPI);
+}
+
+static void ndpi_search_hart_ip(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, "search HART-IP\n");
+  
+  if (packet->payload_packet_len < sizeof(struct hart_ip_hdr)) {
+    goto not_hart_ip;
+  }
+
+  struct hart_ip_hdr const * const hart_ip_header = (struct hart_ip_hdr *)packet->payload;
+  
+  if (hart_ip_header->version == 1 || hart_ip_header->version == 2) {
+    u_int8_t message_type = hart_ip_header->msg_type & 0xF;
+
+    if ((message_type > PUBLISH_MSG && message_type != NAK_MSG) && 
+        hart_ip_header->msg_id > READ_AUDIT_LOG_ID)
+    {
+      goto not_hart_ip;
+    }
+    
+    if (ntohs(hart_ip_header->msg_len) != packet->payload_packet_len) {
+      goto not_hart_ip;
+    }
+    
+    ndpi_int_hart_ip_add_connection(ndpi_struct, flow);
+    return;
+  }
+  
+not_hart_ip:
+  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
+}
+
+void init_hart_ip_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
+{
+  ndpi_set_bitmask_protocol_detection("HART-IP", ndpi_struct, *id,
+                                      NDPI_PROTOCOL_HART_IP,
+                                      ndpi_search_hart_ip,
+                                      NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
+                                      SAVE_DETECTION_BITMASK_AS_UNKNOWN,
+                                      ADD_TO_DETECTION_BITMASK);
+
+  *id += 1;
+}