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/*
* florensia.c
*
* Copyright (C) 2009-11 - ipoque GmbH
* Copyright (C) 2011-22 - 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_FLORENSIA
#include "ndpi_api.h"
static void ndpi_florensia_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_FLORENSIA, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
void ndpi_search_florensia(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 florensia\n");
if (packet->tcp != NULL) {
if (packet->payload_packet_len == 5 && get_l16(packet->payload, 0) == packet->payload_packet_len
&& packet->payload[2] == 0x65 && packet->payload[4] == 0xff) {
if (flow->florensia_stage == 1) {
NDPI_LOG_INFO(ndpi_struct, "found florensia\n");
ndpi_florensia_add_connection(ndpi_struct, flow);
return;
}
NDPI_LOG_DBG2(ndpi_struct, "maybe florensia -> stage is set to 1\n");
flow->florensia_stage = 1;
return;
}
if (packet->payload_packet_len > 8 && get_l16(packet->payload, 0) == packet->payload_packet_len
&& get_u_int16_t(packet->payload, 2) == htons(0x0201) && get_u_int32_t(packet->payload, 4) == htonl(0xFFFFFFFF)) {
NDPI_LOG_DBG2(ndpi_struct, "maybe florensia -> stage is set to 1\n");
flow->florensia_stage = 1;
return;
}
if (packet->payload_packet_len == 406 && get_l16(packet->payload, 0) == packet->payload_packet_len
&& packet->payload[2] == 0x63) {
NDPI_LOG_DBG2(ndpi_struct, "maybe florensia -> stage is set to 1\n");
flow->florensia_stage = 1;
return;
}
if (packet->payload_packet_len == 12 && get_l16(packet->payload, 0) == packet->payload_packet_len
&& get_u_int16_t(packet->payload, 2) == htons(0x0301)) {
if (flow->florensia_stage == 1) {
NDPI_LOG_INFO(ndpi_struct, "found florensia\n");
ndpi_florensia_add_connection(ndpi_struct, flow);
return;
}
NDPI_LOG_DBG2(ndpi_struct, "maybe florensia -> stage is set to 1\n");
flow->florensia_stage = 1;
return;
}
if (flow->florensia_stage == 1) {
if (packet->payload_packet_len == 8 && get_l16(packet->payload, 0) == packet->payload_packet_len
&& get_u_int16_t(packet->payload, 2) == htons(0x0302) && get_u_int32_t(packet->payload, 4) == htonl(0xFFFFFFFF)) {
NDPI_LOG_INFO(ndpi_struct, "found florensia asymmetrically\n");
ndpi_florensia_add_connection(ndpi_struct, flow);
return;
}
if (packet->payload_packet_len == 24 && get_l16(packet->payload, 0) == packet->payload_packet_len
&& get_u_int16_t(packet->payload, 2) == htons(0x0202)
&& get_u_int32_t(packet->payload, packet->payload_packet_len - 4) == htonl(0xFFFFFFFF)) {
NDPI_LOG_INFO(ndpi_struct, "found florensia\n");
ndpi_florensia_add_connection(ndpi_struct, flow);
return;
}
if (flow->packet_counter < 10 && get_l16(packet->payload, 0) == packet->payload_packet_len) {
NDPI_LOG_DBG2(ndpi_struct, "maybe florensia\n");
return;
}
}
}
if (packet->udp != NULL) {
if (flow->florensia_stage == 0 && packet->payload_packet_len == 6
&& get_u_int16_t(packet->payload, 0) == ntohs(0x0503) && get_u_int32_t(packet->payload, 2) == htonl(0xFFFF0000)) {
NDPI_LOG_DBG2(ndpi_struct, "maybe florensia -> stage is set to 1\n");
flow->florensia_stage = 1;
return;
}
if (flow->florensia_stage == 1 && packet->payload_packet_len == 8
&& get_u_int16_t(packet->payload, 0) == ntohs(0x0500) && get_u_int16_t(packet->payload, 4) == htons(0x4191)) {
NDPI_LOG_INFO(ndpi_struct, "found florensia\n");
ndpi_florensia_add_connection(ndpi_struct, flow);
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_florensia_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("Florensia", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_FLORENSIA,
ndpi_search_florensia,
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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