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/*
* starcraft2.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
* Copyright (C) 2011-15 - 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_protocols.h"
#ifdef NDPI_PROTOCOL_STARCRAFT2
<<<<<<< HEAD
/*
HTTP traffic seems to almost exclusively be requests for xml docs, jpgs or .s2* files.
The first two are easy to detect, for the latter a partial string search is needed.
*/
u_int8_t ndpi_check_starcraft2_http(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
struct ndpi_packet_struct* packet = &flow->packet;
//printf("HTTP Test\n");
if (packet->user_agent_line.ptr == NULL)
ndpi_parse_packet_line_info(ndpi_struct, flow);
/* First look for the Battle.net client user agent */
if (packet->user_agent_line.ptr != NULL
&& packet->user_agent_line.len == NDPI_STATICSTRING_LEN("Battle.net Web Client")
&& match_first_bytes(packet->user_agent_line.ptr, "Battle.net Web Client"))
{
/* Now make sure it's actually Starcraft 2 and not some other Blizzard software */
/* The destination port has to be either 1119 or 80 */
if (packet->tcp->dest != htons(1119) && packet->tcp->dest != htons(80))
return 0;
if (packet->payload_packet_len >= NDPI_STATICSTRING_LEN("GET /")
&& match_first_bytes(packet->payload, "GET /"))
{
/* Requests may start with a semi common pattern... */
if (packet->payload_packet_len >= NDPI_STATICSTRING_LEN("S2")
&& match_first_bytes(packet->payload + NDPI_STATICSTRING_LEN("GET /"), "S2"))
return 1;
if (packet->payload_packet_len >= NDPI_STATICSTRING_LEN("s2")
&& match_first_bytes(packet->payload + NDPI_STATICSTRING_LEN("GET /"), "s2"))
return 1;
if (packet->payload_packet_len >= NDPI_STATICSTRING_LEN("sc2")
&& match_first_bytes(packet->payload + NDPI_STATICSTRING_LEN("GET /"), "sc2"))
return 1;
/* ..or end with a specific file format. */
int i = 0;
while (i < packet->payload_packet_len && packet->payload[i] != '.') /* look for the extension of the requested file */
i++;
if (i + 5 < packet->payload_packet_len && packet->payload[i] == '.'
&& match_first_bytes(packet->payload + i + 1, "s2") /* the format can be one between s2mh, s2ml, s2mv, s2ma, s2qh */
&& match_first_bytes(packet->payload + i + 5, " ")) /* make sure the file name is over and it's not just a lucky coincidence */
return 1;
}
}
return 2;
}
=======
>>>>>>> FETCH_HEAD
u_int8_t sc2_using_bnetgame_tcp_port(struct ndpi_packet_struct* packet)
{
return ((packet->tcp->source == htons(1119)) || (packet->tcp->dest == htons(1119)));
}
u_int8_t sc2_using_bnetgame_udp_port(struct ndpi_packet_struct* packet)
{
return ((packet->udp->source == htons(1119)) || (packet->udp->dest == htons(1119)));
}
u_int8_t sc2_match_logon_ip(struct ndpi_packet_struct* packet)
{
u_int32_t source_ip = ntohl(packet->iph->saddr);
u_int32_t dest_ip = ntohl(packet->iph->daddr);
return (ndpi_ips_match(source_ip, dest_ip, 0xD5F87F82, 32) // EU 213.248.127.130
|| ndpi_ips_match(source_ip, dest_ip, 0x0C81CE82, 32) // US 12.129.206.130
|| ndpi_ips_match(source_ip, dest_ip, 0x79FEC882, 32) // KR 121.254.200.130
|| ndpi_ips_match(source_ip, dest_ip, 0xCA09424C, 32) // SG 202.9.66.76
|| ndpi_ips_match(source_ip, dest_ip, 0x0C81ECFE, 32)); // BETA 12.129.236.254
}
/*
The main TCP flow starts with the user login and stays alive until the logout.
<<<<<<< HEAD
Although hard to read, judging from what happens elsewhere this flow probably contains all the data
transfer generated by the user interaction with the client, e.g. chatting or looking at someone's
=======
Although hard to read, judging from what happens elsewhere this flow probably contains all the data
transfer generated by the user interaction with the client, e.g. chatting or looking at someone's
>>>>>>> FETCH_HEAD
match history. The current way to detect this is plain dumb packet matching.
*/
u_int8_t ndpi_check_starcraft2_tcp(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
if (!sc2_match_logon_ip(&flow->packet))
return 2;
if (flow->packet.payload_packet_len >= 10
&& match_first_bytes(flow->packet.payload, "\x4a\x00\x00\x0a\x66\x02\x0a\xed\x2d\x66"))
return 1;
return 0;
}
/*
UPD traffic is the actual game data and it uses a port owned by Blizzard itself, 1119. Therefore the
<<<<<<< HEAD
real key point here is to make sure that it's actually Starcraft 2 that is using the port and not
=======
real key point here is to make sure that it's actually Starcraft 2 that is using the port and not
>>>>>>> FETCH_HEAD
some other Blizzard software.
The flow is taken if a pattern in the size of some subsequent packets is found.
*/
u_int8_t ndpi_check_starcraft2_udp(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
struct ndpi_packet_struct* packet = &flow->packet;
/* First filter out traffic not using port 1119 */
if (!sc2_using_bnetgame_udp_port(packet))
return 2;
<<<<<<< HEAD
/* Then use a simple automa to detect the size pattern */
switch (flow->starcraft2_udp_stage)
{
case 0:
start:
if (packet->payload_packet_len == 548)
flow->starcraft2_udp_stage = 1;
else
flow->starcraft2_udp_stage = 0;
break;
case 1:
if (packet->payload_packet_len == 548)
flow->starcraft2_udp_stage = 2;
else
goto start;
break;
case 2:
if (packet->payload_packet_len == 548)
=======
/* Then use a simple automaton to detect the size pattern */
switch (flow->starcraft2_udp_stage)
{
case 0:
start :
if (packet->payload_packet_len == 548)
flow->starcraft2_udp_stage = 1;
else
flow->starcraft2_udp_stage = 0;
break;
case 1:
if (packet->payload_packet_len == 548)
flow->starcraft2_udp_stage = 2;
else
goto start;
break;
case 2:
if (packet->payload_packet_len == 548)
>>>>>>> FETCH_HEAD
flow->starcraft2_udp_stage = 3;
else
goto start;
break;
case 3:
<<<<<<< HEAD
if (packet->payload_packet_len == 484)
return 1;
else
=======
if (packet->payload_packet_len == 484)
return 1;
else
>>>>>>> FETCH_HEAD
goto start;
break;
}
return 0;
}
void ndpi_check_starcraft2(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
struct ndpi_packet_struct* packet = &flow->packet;
u_int8_t result = 0;
<<<<<<< HEAD
u_int8_t kill = 0;
=======
>>>>>>> FETCH_HEAD
if (packet->udp != NULL)
{
result = ndpi_check_starcraft2_udp(ndpi_struct, flow);
<<<<<<< HEAD
kill = result == 2;
if(result == 1)
=======
if (result == 1)
>>>>>>> FETCH_HEAD
{
printf("Found Starcraft 2 [Game, UDP]\n");
NDPI_LOG(NDPI_PROTOCOL_STARCRAFT2, ndpi_struct, NDPI_LOG_DEBUG, "Found Starcraft 2 [Game, UDP]\n");
}
}
else if (packet->tcp != NULL)
{
<<<<<<< HEAD
result = ndpi_check_starcraft2_http(ndpi_struct, flow);
kill = result == 2;
if (result == 1)
{
printf("Found Starcraft 2 [Client, HTTP]\n");
NDPI_LOG(NDPI_PROTOCOL_STARCRAFT2, ndpi_struct, NDPI_LOG_DEBUG, "Found Starcraft 2 [Client, HTTP]\n");
}
else
{
result = ndpi_check_starcraft2_tcp(ndpi_struct, flow);
kill = kill || result == 2;
if (result == 1)
{
printf("Found Starcraft 2 [Client, TCP]\n");
NDPI_LOG(NDPI_PROTOCOL_STARCRAFT2, ndpi_struct, NDPI_LOG_DEBUG, "Found Starcraft 2 [Client, TCP]\n");
}
=======
result = ndpi_check_starcraft2_tcp(ndpi_struct, flow);
if (result == 1)
{
printf("Found Starcraft 2 [Client, TCP]\n");
NDPI_LOG(NDPI_PROTOCOL_STARCRAFT2, ndpi_struct, NDPI_LOG_DEBUG, "Found Starcraft 2 [Client, TCP]\n");
>>>>>>> FETCH_HEAD
}
}
if (result == 1)
ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_STARCRAFT2, NDPI_REAL_PROTOCOL);
<<<<<<< HEAD
else if (kill)
=======
else if (result == 2)
>>>>>>> FETCH_HEAD
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_STARCRAFT2);
}
void ndpi_search_starcraft2(struct ndpi_detection_module_struct* ndpi_struct, struct ndpi_flow_struct* flow)
{
NDPI_LOG(NDPI_PROTOCOL_STARCRAFT2, ndpi_struct, NDPI_LOG_DEBUG, "Starcraft2 protocol detection...\n");
if (flow->packet.detected_protocol_stack[0] != NDPI_PROTOCOL_STARCRAFT2)
{
ndpi_check_starcraft2(ndpi_struct, flow);
}
}
#endif
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