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/*
* dnp3.c
* Extension for dnp3 recognition
*
* Created by Cesar HM
*/
#include "ndpi_protocol_ids.h"
#include "ndpi_api.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_DNP3
void ndpi_search_dnp3_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 DNP3\n");
/* Check connection over TCP */
if(packet->tcp) {
/* The payload of DNP3 is 10 bytes long.
* Header bytes: 0x0564
*/
if ( packet->payload_packet_len >= 10 &&
packet->payload[0] == 0x05 && packet->payload[1] == 0x64 ){
NDPI_LOG_INFO(ndpi_struct, "found DNP3\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_DNP3, NDPI_PROTOCOL_UNKNOWN);
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_dnp3_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask) {
ndpi_set_bitmask_protocol_detection("DNP3", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_DNP3,
ndpi_search_dnp3_tcp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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