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/*
* warcraft3.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 files */
#include "ndpi_protocols.h"
#ifdef NDPI_PROTOCOL_WARCRAFT3
static void ndpi_int_warcraft3_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_WARCRAFT3, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_warcraft3(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// struct ndpi_id_struct *src=ndpi_struct->src;
// struct ndpi_id_struct *dst=ndpi_struct->dst;
u_int16_t l; /*
Leave it as u_int32_t because otherwise 'u_int16_t temp'
might overflood it and thus generate an infinite loop
*/
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "search WARCRAFT3\n");
if (flow->packet_counter == 1 && packet->payload_packet_len == 1 && packet->payload[0] == 0x01) {
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "maybe warcraft3: packet_len == 1\n");
return;
} else if (packet->payload_packet_len >= 4 && (packet->payload[0] == 0xf7 || packet->payload[0] == 0xff)) {
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "packet_payload begins with 0xf7 or 0xff\n");
l = packet->payload[2] + (packet->payload[3] << 8); // similar to ntohs
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "l = %u \n", l);
while (l <= (packet->payload_packet_len - 4)) {
if (packet->payload[l] == 0xf7) {
u_int16_t temp = (packet->payload[l + 2 + 1] << 8) + packet->payload[l + 2];
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "another f7 visited.\n");
if((temp <= 2) || (temp > 1500)) {
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "break\n");
break;
} else {
l += temp;
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "l = %u \n", l);
}
} else {
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "break\n");
break;
}
}
if (l == packet->payload_packet_len) {
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "maybe WARCRAFT3\n");
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "flow->packet_counter = %u \n",
flow->packet_counter);
if (flow->packet_counter > 2) {
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "detected WARCRAFT3\n");
ndpi_int_warcraft3_add_connection(ndpi_struct, flow);
return;
}
return;
}
}
NDPI_LOG(NDPI_PROTOCOL_WARCRAFT3, ndpi_struct, NDPI_LOG_DEBUG, "no warcraft3 detected.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_WARCRAFT3);
}
#endif
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