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/*
* blizzard.c
*
* Copyright (C) 2015 - Matteo Bracci <matteobracci1@gmail.com>
* Copyright (C) 2015-22 - ntop.org
*
* 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_BLIZZARD
#include "ndpi_api.h"
#include "ndpi_private.h"
static void search_blizzard_tcp(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
struct ndpi_packet_struct* packet = &ndpi_struct->packet;
char wow_string[] = "WORLD OF WARCRAFT CONNECTION";
char overwatch2_string_c[] = "HELLO PRO CLIENT\0";
char overwatch2_string_s[] = "HELLO PRO SERVER\0";
NDPI_LOG_DBG(ndpi_struct, "search Blizzard\n");
/* Generic Battle.net traffic */
if(flow->guessed_protocol_id_by_ip == NDPI_PROTOCOL_BLIZZARD &&
flow->s_port == htons(1119)) {
/* Looking for the first pkt sent by the server */
if(current_pkt_from_server_to_client(ndpi_struct, flow) &&
packet->payload_packet_len == 2 &&
packet->payload[0] == 0x52 && packet->payload[1] == 0x08) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (battle.net)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
} else if(flow->packet_direction_counter[packet->packet_direction] == 1) {
return;
}
}
/* Pattern found on Hearthstone */
if(packet->payload_packet_len >= 8 &&
le32toh(*(uint32_t *)&packet->payload[4]) == (u_int32_t)(packet->payload_packet_len - 8)) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (Hearthstone)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
/* Pattern found on WoW */
if(packet->payload_packet_len >= NDPI_STATICSTRING_LEN(wow_string) &&
memcmp(packet->payload, wow_string, NDPI_STATICSTRING_LEN(wow_string)) == 0) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (wow)\n");
/* Which id? It should be NDPI_PROTOCOL_BLIZZARD, but we already have NDPI_PROTOCOL_WORLDOFWARCRAFT.
Keep using the latter for the time being.... */
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_WORLDOFWARCRAFT, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
/* Pattern found on Overwatch2 */
if((packet->payload_packet_len == NDPI_STATICSTRING_LEN(overwatch2_string_c) &&
memcmp(packet->payload, overwatch2_string_c, NDPI_STATICSTRING_LEN(overwatch2_string_c)) == 0) ||
(packet->payload_packet_len == NDPI_STATICSTRING_LEN(overwatch2_string_s) &&
memcmp(packet->payload, overwatch2_string_s, NDPI_STATICSTRING_LEN(overwatch2_string_s)) == 0)) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (overwatch2)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
/* TODO: other patterns */
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
static void search_blizzard_udp(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 Blizzard\n");
/* Patterns found on Warcraft Rumble */
/* The last bytes are some kind of sequence number, always starting from 1 */
if(/* First pkt send by the client */
(packet->payload_packet_len == 18 &&
le32toh(*(uint32_t *)&packet->payload[14]) == 1) ||
/* First pkt send by the server */
(packet->payload_packet_len == 15 &&
packet->payload[14] == 1)) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (Warcraft Ramble; pattern 1)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
/* First pkt send by the client */
if(packet->payload_packet_len == 23 &&
ndpi_match_strprefix(packet->payload, packet->payload_packet_len, "\xff\xff\xff\xff\xa3\x1f\xb6\x1e\x00\x00\x40\x01\x00\x00\x00\x00\x00\x00\x00\x04\x03\x02\x01")) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (Warcraft Ramble; pattern 2)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
/* Patterns found on Overwatch2 */
/* Some kind of ping */
if(flow->guessed_protocol_id_by_ip == NDPI_PROTOCOL_BLIZZARD &&
packet->payload_packet_len == 40 &&
*(uint32_t *)&packet->payload[17] == 0 /* Seq number starting from 0 */) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (overwatch2; pattern 1)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
if(flow->guessed_protocol_id_by_ip == NDPI_PROTOCOL_BLIZZARD &&
packet->payload_packet_len == 50 &&
((*(uint64_t *)&packet->payload[32] == 0 && *(uint64_t *)&packet->payload[40] == 0) /* First pkt from client */ ||
(*(uint64_t *)&packet->payload[0] == 0 && *(uint64_t *)&packet->payload[8] == 0)) /* First pkt from server */) {
NDPI_LOG_INFO(ndpi_struct, "Found Blizzard (overwatch2; pattern 2)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_BLIZZARD, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
/* TODO: other patterns */
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
static void ndpi_search_blizzard(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
if(flow->l4_proto == IPPROTO_TCP)
search_blizzard_tcp(ndpi_struct, flow);
else
search_blizzard_udp(ndpi_struct, flow);
}
void init_blizzard_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("Blizzard", ndpi_struct, *id,
NDPI_PROTOCOL_BLIZZARD, ndpi_search_blizzard,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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