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/*
* popo.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
* Copyright (C) 2011-19 - 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_POPO
static void ndpi_int_popo_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_POPO);
}
void ndpi_search_popo_tcp_udp(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
struct ndpi_id_struct *src = flow->src;
struct ndpi_id_struct *dst = flow->dst;
if (packet->tcp != NULL) {
if ((packet->payload_packet_len == 20)
&& get_u_int32_t(packet->payload, 0) == htonl(0x0c000000)
&& get_u_int32_t(packet->payload, 4) == htonl(0x01010000)
&& get_u_int32_t(packet->payload, 8) == htonl(0x06000000)
&& get_u_int32_t(packet->payload, 12) == 0 && get_u_int32_t(packet->payload, 16) == 0) {
NDPI_LOG(NDPI_PROTOCOL_POPO, ndpi_struct, NDPI_LOG_DEBUG, "POPO detected\n");
ndpi_int_popo_add_connection(ndpi_struct, flow);
return;
}
if (NDPI_SRC_OR_DST_HAS_PROTOCOL(src, dst, NDPI_PROTOCOL_POPO) != 0) {
#define NDPI_POPO_IP_SUBNET_START ( (220 << 24) + (181 << 16) + (28 << 8) + 220)
#define NDPI_POPO_IP_SUBNET_END ( (220 << 24) + (181 << 16) + (28 << 8) + 238)
/* may match the first payload ip packet only ... */
if (ntohl(packet->iph->daddr) >= NDPI_POPO_IP_SUBNET_START
&& ntohl(packet->iph->daddr) <= NDPI_POPO_IP_SUBNET_END) {
NDPI_LOG(NDPI_PROTOCOL_POPO, ndpi_struct, NDPI_LOG_DEBUG, "POPO ip subnet detected\n");
ndpi_int_popo_add_connection(ndpi_struct, flow);
return;
}
}
}
if (packet->payload_packet_len > 13 && packet->payload_packet_len == get_l32(packet->payload, 0)
&& !get_l16(packet->payload, 12)) {
register u_int16_t ii;
for (ii = 14; ii < 50 && ii < packet->payload_packet_len - 8; ++ii) {
if (packet->payload[ii] == '@')
if (!memcmp(&packet->payload[ii + 1], "163.com", 7)
|| (ii <= packet->payload_packet_len - 13 && !memcmp(&packet->payload[ii + 1], "popo.163.com", 12))) {
NDPI_LOG(NDPI_PROTOCOL_POPO, ndpi_struct, NDPI_LOG_DEBUG, "POPO detected.\n");
ndpi_int_popo_add_connection(ndpi_struct, flow);
return;
}
}
}
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_POPO);
}
#endif
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