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/*
* bitcoin.c
*
* Copyright (C) 2018-23 - 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"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_BITCOIN
#include "ndpi_api.h"
#include "ndpi_private.h"
/*https://en.bitcoin.it/wiki/Protocol_documentation*/
#define MAIN_NET_MAGIC 0xF9BEB4D9
#define TEST_NET_MAGIC 0xFABFB5DA
#define TEST_3_NET_MAGIC 0x0B110907
#define SIG_NET_MAGIC 0x0A03CF40
#define NAME_COIN_NET_MAGIC 0xF9BEB4FE
static void ndpi_search_bitcoin(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow) {
NDPI_LOG_DBG(ndpi_struct, "search BITCOIN\n");
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
if(packet->payload_packet_len >= 4) {
if(packet->tcp->source == htons(8333) ||
packet->tcp->dest == htons(8333)) {
u_int32_t ntoh_to_match = ntohl(*(u_int32_t*)packet->payload);
switch (ntoh_to_match) {
case MAIN_NET_MAGIC:
case TEST_NET_MAGIC:
case TEST_3_NET_MAGIC:
case SIG_NET_MAGIC:
case NAME_COIN_NET_MAGIC:
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BITCOIN, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
NDPI_LOG_INFO(ndpi_struct, "found BITCOIN\n");
return;
}
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
/* ************************************************************************** */
void init_bitcoin_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("Bitcoin", ndpi_struct, *id,
NDPI_PROTOCOL_BITCOIN,
ndpi_search_bitcoin,
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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