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/*
* kxun.c
*
* Copyright (C) 2016 - 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_protocols.h"
#ifdef NDPI_PROTOCOL_1KXUN
static void ndpi_int_kxun_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_1KXUN, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_kxun(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
/* 1KXUN over TCP is detected inside HTTP dissector */
/* check 1KXUN over UDP */
if(packet->udp != NULL) {
/* check ipv6 */
if(packet->iphv6 != NULL) {
if(packet->iphv6->ip6_dst.u6_addr.u6_addr32[0] == 0x2ff &&
packet->payload_packet_len == 329) {
if(packet->payload[0] == 0xff &&
packet->payload[1] == 0x0f &&
packet->payload[4] == 0xa0 &&
packet->payload[5] == 0x00) {
NDPI_LOG(NDPI_PROTOCOL_1KXUN, ndpi_struct, NDPI_LOG_DEBUG,
"found 1kxun over udp.\n");
ndpi_int_kxun_add_connection(ndpi_struct, flow);
return;
}
}
}
else if(packet->iph != NULL) {
if(packet->iph->daddr == 0xffffffff) {
if(packet->payload_packet_len == 40 &&
packet->payload[8] == 0x41 &&
packet->payload[9] == 0x41 &&
packet->payload[10] == 0x42) {
NDPI_LOG(NDPI_PROTOCOL_1KXUN, ndpi_struct, NDPI_LOG_DEBUG,
"found 1kxun over udp.\n");
ndpi_int_kxun_add_connection(ndpi_struct, flow);
return;
}
if(packet->payload_packet_len == 317 &&
packet->payload[0] == 0xff &&
packet->payload[1] == 0xff &&
packet->payload[4] == 0xa0 &&
packet->payload[5] == 0x00) {
NDPI_LOG(NDPI_PROTOCOL_1KXUN, ndpi_struct, NDPI_LOG_DEBUG,
"found 1kxun over udp.\n");
ndpi_int_kxun_add_connection(ndpi_struct, flow);
return;
}
}
}
}
/* EXCLUDE 1KXUN */
NDPI_LOG(NDPI_PROTOCOL_1KXUN, ndpi_struct, NDPI_LOG_DEBUG, "exclude 1kxun.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_1KXUN);
}
void init_kxun_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("1kxun", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_1KXUN,
ndpi_search_kxun,
NDPI_SELECTION_BITMASK_PROTOCOL_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
#endif
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