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/*
* ookla.c
*
* Copyright (C) 2018-22 - 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_OOKLA
#include "ndpi_api.h"
/* #define DEBUG_OOKLA_LRU */
const u_int16_t ookla_port = 8080;
/* ************************************************************* */
static u_int32_t get_ookla_key(struct ndpi_flow_struct *flow)
{
if(flow->is_ipv6)
return ndpi_quick_hash(flow->c_address.v6, 16);
else
return ntohl(flow->c_address.v4);
}
/* ************************************************************* */
int ookla_search_into_cache(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
u_int32_t key;
u_int16_t dummy;
if(ndpi_struct->ookla_cache) {
key = get_ookla_key(flow);
#ifdef DEBUG_OOKLA_LRU
printf("[LRU OOKLA] Search %u\n", key);
#endif
if(ndpi_lru_find_cache(ndpi_struct->ookla_cache, key,
&dummy, 0 /* Don't remove it as it can be used for other connections */,
ndpi_get_current_time(flow))) {
#ifdef DEBUG_OOKLA_LRU
printf("[LRU OOKLA] Found\n");
#endif
return 1;
}
}
return 0;
}
/* ************************************************************* */
void ookla_add_to_cache(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
u_int32_t key;
if(ndpi_struct->ookla_cache) {
key = get_ookla_key(flow);
#ifdef DEBUG_OOKLA_LRU
printf("[LRU OOKLA] ADDING %u\n", key);
#endif
ndpi_lru_add_to_cache(ndpi_struct->ookla_cache, key, 1 /* dummy */,
ndpi_get_current_time(flow));
}
}
/* ************************************************************* */
void ndpi_search_ookla(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, "Ookla detection\n");
if(ntohs(flow->s_port) != ookla_port && ntohs(flow->c_port) != ookla_port) {
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
return;
}
if(flow->packet_counter == 1 &&
packet->payload_packet_len >= NDPI_STATICSTRING_LEN("HI") &&
memcmp(packet->payload, "HI", NDPI_STATICSTRING_LEN("HI")) == 0) {
flow->ookla_stage = 1;
return;
}
if(flow->packet_counter == 2 &&
flow->ookla_stage == 1 &&
packet->payload_packet_len >= NDPI_STATICSTRING_LEN("HELLO") &&
memcmp(packet->payload, "HELLO", NDPI_STATICSTRING_LEN("HELLO")) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found ookla (Hi + Hello)\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_OOKLA, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
ookla_add_to_cache(ndpi_struct, flow);
return;
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
/* ************************************************************* */
void init_ookla_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id) {
ndpi_set_bitmask_protocol_detection("Ookla", ndpi_struct, *id,
NDPI_PROTOCOL_OOKLA,
ndpi_search_ookla,
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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