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/*
* mining.c
*
* Copyright (C) 2018-22 - 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_MINING
#include "ndpi_api.h"
#include "ndpi_private.h"
/* ************************************************************************** */
u_int64_t mining_make_lru_cache_key(struct ndpi_flow_struct *flow) {
u_int64_t key;
/* network byte order */
if(flow->is_ipv6)
key = (ndpi_quick_hash64((const char *)flow->c_address.v6, 16) << 32) | (ndpi_quick_hash64((const char *)flow->s_address.v6, 16) & 0xFFFFFFFF);
else
key = ((u_int64_t)flow->c_address.v4 << 32) | flow->s_address.v4;
return key;
}
/* ************************************************************************** */
static void cacheMiningHostTwins(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow) {
if(ndpi_struct->mining_cache)
ndpi_lru_add_to_cache(ndpi_struct->mining_cache, mining_make_lru_cache_key(flow), NDPI_PROTOCOL_MINING, ndpi_get_current_time(flow));
}
/* ************************************************************************** */
static void ndpi_search_mining(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 MINING\n");
/* Quick test: we are looking for only Json format */
if(packet->payload[0] != '{') {
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
return;
}
/* STRATUMv1 */
if(ndpi_strnstr((const char *)packet->payload, "\"mining.subscribe\"", packet->payload_packet_len) ||
ndpi_strnstr((const char *)packet->payload, "\"mining.configure\"", packet->payload_packet_len)) {
/* Try matching some zcash domains like "eu1-zcash.flypool.org" */
if(ndpi_strnstr((const char *)packet->payload, "zcash", packet->payload_packet_len))
ndpi_snprintf(flow->protos.mining.currency, sizeof(flow->protos.mining.currency), "%s", "ZCash");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_MINING, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
cacheMiningHostTwins(ndpi_struct, flow);
return;
}
/* Xmr-stak-cpu is a ZCash/Monero CPU miner */
if(ndpi_strnstr((const char *)packet->payload, "\"agent\":\"xmr-stak-cpu", packet->payload_packet_len)) {
ndpi_snprintf(flow->protos.mining.currency, sizeof(flow->protos.mining.currency), "%s", "ZCash/Monero");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_MINING, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
cacheMiningHostTwins(ndpi_struct, flow);
return;
}
if(ndpi_strnstr((const char *)packet->payload, "\"method\": \"eth_submitLogin", packet->payload_packet_len)) {
ndpi_snprintf(flow->protos.mining.currency, sizeof(flow->protos.mining.currency), "%s", "Ethereum");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_MINING, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
cacheMiningHostTwins(ndpi_struct, flow);
return;
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
/* ************************************************************************** */
void init_mining_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("Mining", ndpi_struct, *id,
NDPI_PROTOCOL_MINING,
ndpi_search_mining,
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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