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as explained here for bitcoin https://www.ntop.org/guides/nDPI/protocols.html#ndpi-protocol-bitcoin the same is applicable for ethereum. ethereum detection was removed from mining protocol and is now handled separately. Signed-off-by: Mahmoud Maatuq <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| /* | ||
| * ethereum.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_ETHEREUM | ||
| #include "ndpi_api.h" | ||
|
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|
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| /* ************************************************************************** */ | ||
|
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| static u_int32_t ndpi_ether_make_lru_cache_key(struct ndpi_flow_struct *flow) { | ||
| u_int32_t key; | ||
|
|
||
| /* network byte order */ | ||
| if(flow->is_ipv6) | ||
| key = ndpi_quick_hash(flow->c_address.v6, 16) + ndpi_quick_hash(flow->s_address.v6, 16); | ||
| else | ||
| key = flow->c_address.v4 + flow->s_address.v4; | ||
|
|
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| return key; | ||
| } | ||
|
|
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| /* ************************************************************************** */ | ||
|
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| static void ndpi_ether_cache_connection(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, ndpi_ether_make_lru_cache_key(flow), NDPI_PROTOCOL_ETHEREUM, ndpi_get_current_time(flow)); | ||
| } | ||
|
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| /* ************************************************************************** */ | ||
|
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| static void ndpi_search_ethereum_udp(struct ndpi_detection_module_struct *ndpi_struct, | ||
| struct ndpi_flow_struct *flow) { | ||
| struct ndpi_packet_struct *packet = &ndpi_struct->packet; | ||
| u_int16_t source = ntohs(packet->udp->source); | ||
| u_int16_t dest = ntohs(packet->udp->dest); | ||
|
|
||
| NDPI_LOG_DBG(ndpi_struct, "search ETHEREUM UDP\n"); | ||
|
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| /* | ||
| Ethereum P2P Discovery Protocol | ||
| https://github.com/ConsenSys/ethereum-dissectors/blob/master/packet-ethereum-disc.c | ||
| */ | ||
| if((packet->payload_packet_len > 98) | ||
| && (packet->payload_packet_len < 1280) | ||
| && ((source == 30303) || (dest == 30303)) | ||
| && (packet->payload[97] <= 0x04 /* NODES */) | ||
| ) { | ||
| if((packet->iph) && ((ntohl(packet->iph->daddr) & 0xFF000000 /* 255.0.0.0 */) == 0xFF000000)) | ||
| ; | ||
| else if(packet->iphv6 && ntohl(packet->iphv6->ip6_dst.u6_addr.u6_addr32[0]) == 0xFF020000) | ||
| ; | ||
| else { | ||
| ndpi_snprintf(flow->protos.mining.currency, sizeof(flow->protos.mining.currency), "%s", "ETH"); | ||
| ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_ETHEREUM, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); | ||
| ndpi_ether_cache_connection(ndpi_struct, flow); | ||
| return; | ||
| } | ||
| } | ||
|
|
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| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| } | ||
|
|
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| /* ************************************************************************** */ | ||
|
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| static u_int8_t ndpi_is_ether_port(u_int16_t dport) { | ||
| return(((dport >= 30300) && (dport <= 30305)) ? 1 : 0); | ||
| } | ||
|
|
||
| /* ************************************************************************** */ | ||
|
|
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| static void ndpi_search_ethereum_tcp(struct ndpi_detection_module_struct *ndpi_struct, | ||
| struct ndpi_flow_struct *flow) { | ||
| struct ndpi_packet_struct *packet = &ndpi_struct->packet; | ||
|
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| NDPI_LOG_DBG(ndpi_struct, "search ETHEREUM TCP\n"); | ||
|
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| /* Check connection over TCP */ | ||
| if(packet->payload_packet_len > 10) { | ||
| if((packet->payload_packet_len > 300) | ||
| && (packet->payload_packet_len < 600) | ||
| && (packet->payload[2] == 0x04)) { | ||
| if(ndpi_is_ether_port(ntohs(packet->tcp->dest)) /* Ethereum port */) { | ||
| ndpi_snprintf(flow->protos.mining.currency, sizeof(flow->protos.mining.currency), "%s", "ETH"); | ||
| ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_ETHEREUM, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); | ||
| ndpi_ether_cache_connection(ndpi_struct, flow); | ||
| return; | ||
| } | ||
| } else if(ndpi_strnstr((const char *)packet->payload, "{", packet->payload_packet_len) | ||
| && ( | ||
| ndpi_strnstr((const char *)packet->payload, "\"eth1.0\"", packet->payload_packet_len) | ||
| || ndpi_strnstr((const char *)packet->payload, "\"worker\":", packet->payload_packet_len) | ||
| /* || ndpi_strnstr((const char *)packet->payload, "\"id\":", packet->payload_packet_len) - Removed as too generic */ | ||
| )) { | ||
| /* | ||
| Ethereum | ||
| {"worker": "eth1.0", "jsonrpc": "2.0", "params": ["0x0fccfff9e61a230ff380530c6827caf4759337c6.rig2", "x"], "id": 2, "method": "eth_submitLogin"} | ||
| { "id": 2, "jsonrpc":"2.0","result":true} | ||
| {"worker": "", "jsonrpc": "2.0", "params": [], "id": 3, "method": "eth_getWork"} | ||
| */ | ||
| ndpi_snprintf(flow->protos.mining.currency, sizeof(flow->protos.mining.currency), "%s", "ETH"); | ||
| ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_ETHEREUM, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); | ||
| ndpi_ether_cache_connection(ndpi_struct, flow); | ||
| return; | ||
| } | ||
| } | ||
|
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| NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
| } | ||
|
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| /* ************************************************************************** */ | ||
|
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| static void ndpi_search_ethereum(struct ndpi_detection_module_struct *ndpi_struct, | ||
| struct ndpi_flow_struct *flow) { | ||
| struct ndpi_packet_struct *packet = &ndpi_struct->packet; | ||
|
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| if(packet->tcp) | ||
| return ndpi_search_ethereum_tcp(ndpi_struct, flow); | ||
| return ndpi_search_ethereum_udp(ndpi_struct, flow); | ||
| } | ||
|
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|
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| /* ************************************************************************** */ | ||
|
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| void init_ethereum_dissector(struct ndpi_detection_module_struct *ndpi_struct, | ||
| u_int32_t *id) | ||
| { | ||
| ndpi_set_bitmask_protocol_detection("Ethereum", ndpi_struct, *id, | ||
| NDPI_PROTOCOL_ETHEREUM, | ||
| ndpi_search_ethereum, | ||
| NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, | ||
| SAVE_DETECTION_BITMASK_AS_UNKNOWN, | ||
| ADD_TO_DETECTION_BITMASK); | ||
|
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||
| *id += 1; | ||
| } | ||
|
|
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