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miner_detector.cpp
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miner_detector.cpp
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/**
* \file miner_detector.cpp
* \brief Nemea module for detecting bitcoin miners.
* \author Erik Sabik <xsabik02@stud.fit.vutbr.cz>
* \date 2016
*/
/*
* Copyright (C) 2013,2014 CESNET
*
* LICENSE TERMS
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of the Company nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* ALTERNATIVELY, provided that this notice is retained in full, this
* product may be distributed under the terms of the GNU General Public
* License (GPL) version 2 or later, in which case the provisions
* of the GPL apply INSTEAD OF those given above.
*
* This software is provided ``as is'', and any express or implied
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose are disclaimed.
* In no event shall the company or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even
* if advised of the possibility of such damage.
*
*/
// Information if sigaction is available for nemea signal macro registration
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <unistd.h>
#include <time.h>
#include <libtrap/trap.h>
#include <unirec/unirec.h>
#include <nemea-common.h>
#include <ctype.h>
#include "fields.h"
#include "miner_detector.h"
#include "utils.h"
#include "sender.h"
#include <algorithm>
#include <iostream>
#include <fstream>
#include <map>
#include <string>
#include <vector>
//#define DEBUG
#ifdef DEBUG
#define DEBUG_PRINT(...) do{ fprintf( stdout, "DEBUG: " __VA_ARGS__ ); } while( false )
#else
#define DEBUG_PRINT(...) do{ } while ( false )
#endif
using namespace std;
//vector<>
fht_table_t *BLACKLIST_DB;
fht_table_t *WHITELIST_DB;
fht_table_t *SUSPECT_DB;
pthread_t MINER_DETECTOR_CHECK_THREAD_ID;
pthread_t MINER_DETECTOR_LISTTIMEOUT_THREAD_ID;
uint32_t CURRENT_TIME;
bool CHECK_STRATUM_FLAG;
const char *BL_STORE_FILE;
const char *WL_STORE_FILE;
uint32_t TIMEOUT_INACTIVE;
uint32_t TIMEOUT_EXPORT;
uint32_t CHECK_THREAD_SLEEP_PERIOD;
uint32_t SUSPECT_SCORE_THRESHOLD;
uint32_t SUSPECT_DB_SIZE;
uint32_t SUSPECT_DB_STASH_SIZE;
uint32_t WHITELIST_DB_SIZE;
uint32_t WHITELIST_DB_STASH_SIZE;
uint32_t BLACKLIST_DB_SIZE;
uint32_t BLACKLIST_DB_STASH_SIZE;
extern int STOP;
extern Sender *SENDER;
/**
* \brief Reads IP addresses with ports from specified file into database.
* \param db Database to read data into.
* \param fname Name of the file from which to read.
* \return True on success, False otherwise.
*/
void create_db_from_file(fht_table_t *db, string fname)
{
list_key_t key;
uint32_t value = BWL_PERMANENT_RECORD;
fstream fin;
fin.open(fname.c_str(), ios::in);
while (fin.good()) {
string line;
string ip;
uint16_t port;
getline(fin, line);
size_t delim_pos = line.find(':');
if (delim_pos == string::npos) {
// No port specified
ip = line;
port = 0;
} else {
// IP:port
ip = line.substr(0, delim_pos);
port = strtol(line.substr(delim_pos + 1).c_str(), NULL, 10);
}
// Trim whitespaces from IP string and check its length
ip.erase(remove_if(ip.begin(), ip.end(), ::isspace), ip.end());
if (ip.size() == 0) {
continue; // Ignore zero size lines
}
memset(&key, 0, sizeof(list_key_t));
//key.ip = convert_string_to_unirec_ip(ip);
ip_from_str(ip.c_str(), &key.ip);
key.port = port;
// Insert into db
int ret = fht_insert(db, &key, &value, NULL, NULL);
switch (ret) {
case FHT_INSERT_OK: // Insert was successfull
break;
case FHT_INSERT_LOST: // Insert kicked out item
DEBUG_PRINT("Not enough space to store items in DB when reading from input file.\n");
break;
case FHT_INSERT_FAILED: // Item with same key is already in the table, this can not happen or can?
DEBUG_PRINT("Item '%s:%u' has multiple occurrences in input file.\n", ip.c_str(), port);
break;
}
}
fin.close();
}
/**
* \brief Initialize suspect database.
* \return True on success, false otherwise.
*/
bool initialize_suspect_db(void)
{
if ((SUSPECT_DB = fht_init(SUSPECT_DB_SIZE, sizeof(suspect_item_key_t), sizeof(suspect_item_t), SUSPECT_DB_STASH_SIZE)) == NULL) {
return false;
} else {
return true;
}
}
/**
* \brief Initialize whitelist database.
* \return True on success, false otherwise.
*/
bool initialize_whitelist_db(void)
{
if ((WHITELIST_DB = fht_init(WHITELIST_DB_SIZE, sizeof(list_key_t), sizeof(uint32_t), WHITELIST_DB_STASH_SIZE)) == NULL) {
return false;
} else {
return true;
}
}
/**
* \brief Initialize whitelist database.
* \return True on success, false otherwise.
*/
bool initialize_blacklist_db(void)
{
if ((BLACKLIST_DB = fht_init(BLACKLIST_DB_SIZE, sizeof(list_key_t), sizeof(uint32_t), BLACKLIST_DB_STASH_SIZE)) == NULL) {
return false;
} else {
return true;
}
}
/**
* \brief Compute score of suspect, higher value means higher chance of suspect
* being miner.
* \param s Structure containg suspect aggregated flow information.
* \return Score of the suspect.
*/
uint32_t compute_suspect_score(suspect_item_t &s)
{
uint32_t ackpush_flows = s.ack_flows + s.ackpush_flows;
uint32_t flows = s.ack_flows + s.ackpush_flows + s.other_flows;
uint32_t bpp = (uint32_t)(((float) s.bytes) / s.packets);
uint32_t ppf = (uint32_t) (((float) s.packets) / flows);
uint32_t active_time = (s.last_seen - s.last_exported);
int32_t ppm = active_time < 5 ? -1 : (int32_t)(((float) s.packets) / (active_time / 60.0)); // Prevent divide by low numbers
uint32_t score = 0;
if ((int) (((float)ackpush_flows) / flows * 100) >= SUSPECT_ACKPUSH_FLOW_RATIO) {
score += SUSPECT_SCORE_ACKPUSH_FLOW_RATIO;
}
if (bpp > SUSPECT_LOW_BPP_TRESHOLD && bpp < SUSPECT_HIGH_BPP_THRESHOLD) {
score += SUSPECT_SCORE_BPP;
}
if (ppf < SUSPECT_REVERSE_LOW_PPF_TRESHOLD || ppf > SUSPECT_REVERSE_HIGH_PPF_TRESHOLD) {
score += SUSPECT_SCORE_PPF;
}
if (ppm != -1 && ppm >= SUSPECT_LOW_PPM_TRESHOLD && ppm <= SUSPECT_HIGH_PPM_TRESHOLD) {
score += SUSPECT_SCORE_PPM;
}
if (s.req_flows / (double) flows > SUSPECT_REQ_FLOWS_TRESHOLD) {
score += SUSPECT_SCORE_REQ_FLOWS;
}
if (active_time >= SUSPECT_MIN_ACTIVE_TIME) {
score += SUSPECT_SCORE_ACTIVE_TIME;
}
return score;
}
/**
* \brief Decide if a suspect is miner or not, based on decision tree
* created by Weka.
* \param s Structure containg suspect aggregated flow information.
* \return 0 if not miner, 1 if miner.
*/
uint8_t compute_weka_tree(suspect_item_t &s)
{
uint32_t ackpush_flows = s.ack_flows + s.ackpush_flows;
uint32_t flows = s.ack_flows + s.ackpush_flows + s.other_flows;
uint32_t bpp = (uint32_t)(((float) s.bytes) / s.packets);
uint32_t ppf = (uint32_t) (((float) s.packets) / flows);
uint32_t active_time = (s.last_seen - s.last_exported);
int32_t ppm = active_time < 5 ? -1 : (int32_t)(((float) s.packets) / (active_time / 60.0)); // Prevent divide by low numbers
uint32_t ackpushSall = (uint32_t)((ackpush_flows / ((double)flows)) * 100);
uint32_t synSall = (uint32_t)((s.syn_flows / ((double)flows)) * 100);
uint32_t rstSall = (uint32_t)((s.rst_flows / ((double)flows)) * 100);
uint32_t finSall = (uint32_t)((s.fin_flows / ((double)flows)) * 100);
uint32_t reqSall = (uint32_t)((s.req_flows / ((double)flows)) * 100);
// Decision Tree created by Weka
if (ppm <= 135) {
if (bpp <= 70) {
if (ppm <= 12) {
if (rstSall <= 1) {
if (finSall <= 7) {
if (ppf <= 3) {
if (bpp <= 59) {
if (ackpushSall <= 86) {
return 0;
}
if (ackpushSall > 86) {
if (ppf <= 1) {
if (bpp <= 54) {
if (ppm <= 5) {
if (synSall <= 1) {
if (ackpushSall <= 95) {
return 0;
}
if (ackpushSall > 95) {
if (ppm <= 1) {
return 1;
}
if (ppm > 1) {
if (ackpushSall <= 97) {
return 0;
}
if (ackpushSall > 97) {
if (finSall <= 0) {
if (ackpushSall <= 99) {
if (ppm <= 4) {
return 0;
}
if (ppm > 4) {
return 1;
}
}
if (ackpushSall > 99) {
return 1;
}
}
if (finSall > 0) {
return 0;
}
}
}
}
}
if (synSall > 1) {
if (finSall <= 6) {
return 0;
}
if (finSall > 6) {
return 1;
}
}
}
if (ppm > 5) {
return 0;
}
}
if (bpp > 54) {
return 0;
}
}
if (ppf > 1) {
if (ppf <= 2) {
if (synSall <= 6) {
if (rstSall <= 0) {
if (bpp <= 55) {
if (finSall <= 3) {
if (ackpushSall <= 93) {
if (ppm <= 5) {
return 0;
}
if (ppm > 5) {
return 1;
}
}
if (ackpushSall > 93) {
if (bpp <= 52) {
if (ppm <= 6) {
if (ackpushSall <= 99) {
if (finSall <= 0) {
return 0;
}
if (finSall > 0) {
if (bpp <= 43) {
return 1;
}
if (bpp > 43) {
if (synSall <= 0) {
return 1;
}
if (synSall > 0) {
return 0;
}
}
}
}
if (ackpushSall > 99) {
return 1;
}
}
if (ppm > 6) {
return 0;
}
}
if (bpp > 52) {
if (ppm <= 3) {
if (ackpushSall <= 97) {
return 0;
}
if (ackpushSall > 97) {
return 1;
}
}
if (ppm > 3) {
if (ackpushSall <= 98) {
if (bpp <= 54) {
return 1;
}
if (bpp > 54) {
if (ackpushSall <= 94) {
return 1;
}
if (ackpushSall > 94) {
return 0;
}
}
}
if (ackpushSall > 98) {
return 0;
}
}
}
}
}
if (finSall > 3) {
return 0;
}
}
if (bpp > 55) {
if (ppm <= 8) {
if (ppm <= 1) {
return 0;
}
if (ppm > 1) {
if (ackpushSall <= 99) {
if (ackpushSall <= 94) {
if (ppm <= 4) {
return 0;
}
if (ppm > 4) {
if (bpp <= 56) {
return 1;
}
if (bpp > 56) {
if (ackpushSall <= 89) {
return 1;
}
if (ackpushSall > 89) {
return 0;
}
}
}
}
if (ackpushSall > 94) {
return 0;
}
}
if (ackpushSall > 99) {
return 1;
}
}
}
if (ppm > 8) {
return 0;
}
}
}
if (rstSall > 0) {
if (bpp <= 56) {
if (ackpushSall <= 96) {
if (bpp <= 40) {
return 1;
}
if (bpp > 40) {
if (ppm <= 6) {
return 0;
}
if (ppm > 6) {
return 1;
}
}
}
if (ackpushSall > 96) {
return 0;
}
}
if (bpp > 56) {
return 0;
}
}
}
if (synSall > 6) {
return 0;
}
}
if (ppf > 2) {
if (ackpushSall <= 99) {
return 0;
}
if (ackpushSall > 99) {
if (ppm <= 5) {
if (ppm <= 3) {
return 0;
}
if (ppm > 3) {
return 1;
}
}
if (ppm > 5) {
return 0;
}
}
}
}
}
}
if (bpp > 59) {
if (ppf <= 1) {
return 0;
}
if (ppf > 1) {
if (ppm <= 4) {
if (finSall <= 1) {
if (ppm <= 2) {
return 0;
}
if (ppm > 2) {
if (synSall <= 91) {
if (ackpushSall <= 99) {
return 0;
}
if (ackpushSall > 99) {
return 1;
}
}
if (synSall > 91) {
return 1;
}
}
}
if (finSall > 1) {
return 0;
}
}
if (ppm > 4) {
return 0;
}
}
}
}
if (ppf > 3) {
if (ackpushSall <= 99) {
return 0;
}
if (ackpushSall > 99) {
if (bpp <= 57) {
return 0;
}
if (bpp > 57) {
if (ppm <= 6) {
return 0;
}
if (ppm > 6) {
if (ppf <= 10) {
if (ppm <= 10) {
if (bpp <= 67) {
if (ppf <= 8) {
if (bpp <= 58) {
return 1;
}
if (bpp > 58) {
return 0;
}
}
if (ppf > 8) {
return 1;
}
}
if (bpp > 67) {
return 0;
}
}
if (ppm > 10) {
return 0;
}
}
if (ppf > 10) {
return 0;
}
}
}
}
}
}
if (finSall > 7) {
return 0;
}
}
if (rstSall > 1) {
if (finSall <= 97) {
if (synSall <= 2) {
if (ppf <= 5) {
return 0;
}
if (ppf > 5) {
return 1;
}
}
if (synSall > 2) {
return 0;
}
}
if (finSall > 97) {
if (ppf <= 6) {
return 0;
}
if (ppf > 6) {
return 1;
}
}
}
}
if (ppm > 12) {
return 0;
}
}
if (bpp > 70) {
if (ppm <= 70) {
if (reqSall <= 75) {
return 1;
}
if (reqSall > 75) {
return 0;
}
}
if (ppm > 70) {
if (ackpushSall <= 99) {
return 0;
}
if (ackpushSall > 99) {
if (bpp <= 105) {
return 0;
}
if (bpp > 105) {
return 1;
}
}
}
}
}
if (ppm > 135) {
if (bpp <= 103) {
return 0;
}
if (bpp > 103) {
if (bpp <= 108) {
if (ppf <= 230) {
return 1;
}
if (ppf > 230) {
return 0;
}
}
if (bpp > 108) {
return 0;
}
}
}
return 0;
}
/**
* \brief Add suspect into database.
* \param key Key to the database (used for later referencing).
* \param suspect Aggregated flow data about suspect.
*/
void insert_suspect_to_db(suspect_item_key_t &key, suspect_item_t &suspect)
{
suspect_item_key_t lost_key;
suspect_item_t lost_suspect;
int ret = fht_insert(SUSPECT_DB, &key, &suspect, &lost_key, &lost_suspect);
switch (ret) {
case FHT_INSERT_OK: // Insert was successfull
break;
case FHT_INSERT_LOST: // Insert kicked out item
//DEBUG_PRINT("Item was kicked out from table :(\n");
break;
case FHT_INSERT_FAILED: // Item with same key is already in the table, this can not happen or can?
//DEBUG_PRINT("Item already in the table!!!\n");
break;
}
// Check kicked out suspect
if (ret == FHT_INSERT_LOST) {
ip_addr_t miner_ip = lost_key.suspect_ip;
ip_addr_t pool_ip = lost_key.pool_ip;
uint16_t port = lost_key.port;
list_key_t check_key;
memset(&check_key, 0, sizeof(list_key_t));
check_key.ip = pool_ip;
check_key.port = port;
if (fht_get_data(BLACKLIST_DB, &check_key) || lost_suspect.flagged) {
// Is blacklisted -> report
SENDER->send(miner_ip, pool_ip, port, lost_suspect.first_seen, lost_suspect.last_seen, lost_suspect.packets);
}
}
}
/**
* \brief Store current W/B list database in file for use in next run.
* \param db Database from which the data will be read.
* \param fname File name to which the data will be written.
*/
void store_list_db(fht_table_t *db, const char *fname)
{
char buff[128];
ofstream myfile;
if (!fname) {
// Store file was not set, do not store databases
DEBUG_PRINT("No store file specified!\n");
return;
}
myfile.open(fname);
fht_iter_t *iter = fht_init_iter(db);
while (fht_get_next_iter(iter) == FHT_ITER_RET_OK) {
// Get IP address and port from iterator
ip_addr_t *ip = &((list_key_t*)iter->key_ptr)->ip;
uint16_t *port = &((list_key_t*)iter->key_ptr)->port;
ip_to_str(ip, buff);
string ip_str = string(buff);
myfile << ip_str << ":" << *port << endl;
}
fht_destroy_iter(iter);
myfile.close();
}
/**
* \brief Check every suspect in suspect database and export everyone
* on blacklist.
*/
void export_suspects(void)
{
fht_iter_t *iter = fht_init_iter(SUSPECT_DB);
while (fht_get_next_iter(iter) == FHT_ITER_RET_OK) {
// Get IP addresses and port from iterator
ip_addr_t *miner_ip = &((suspect_item_key_t*)iter->key_ptr)->suspect_ip;
ip_addr_t *pool_ip = &((suspect_item_key_t*)iter->key_ptr)->pool_ip;
uint16_t port = ((suspect_item_key_t*)iter->key_ptr)->port;
list_key_t key;
memset(&key, 0, sizeof(list_key_t));
key.ip = *pool_ip;
key.port = port;
if (fht_get_data(BLACKLIST_DB, &key)) {
// Is blacklisted -> report
SENDER->send(*miner_ip, *pool_ip, port, ((suspect_item_t*)iter->data_ptr)->first_seen, ((suspect_item_t*)iter->data_ptr)->last_seen, ((suspect_item_t*)iter->data_ptr)->packets);
}
}
fht_destroy_iter(iter);
}
/**
* \brief Thread for checking expired items in blacklist/whitelist DB.
* \param data Nothing, null
* \return Nothing, null.
*/
void *list_timeout_thread(void *data)
{
fht_iter_t *black_iter = fht_init_iter(BLACKLIST_DB);
fht_iter_t *white_iter = fht_init_iter(WHITELIST_DB);
while(!STOP) {
uint32_t white_expired_sum = 0;
uint32_t black_expired_sum = 0;
time_t timestamp = CURRENT_TIME;
struct tm tmp_tm;
char timestr[200];
strftime(timestr, 200, "%Y-%m-%dT%H:%M:%S", localtime_r(×tamp, &tmp_tm));
DEBUG_PRINT("[%s] New round of checking black/white list\n", timestr);
// Check blacklist DB
fht_reinit_iter(black_iter);
// Cycle through every item in blacklist DB
while (fht_get_next_iter(black_iter) == FHT_ITER_RET_OK) {
if (STOP) {
DEBUG_PRINT("STOP signal detected\n");
break;
}
// Check timestamp if it is permanent
if (*((uint32_t*)black_iter->data_ptr) == BWL_PERMANENT_RECORD) {
continue; // Permanent records do not expire
}
// Check timestamp if it expired
if (CURRENT_TIME - *((uint32_t*)black_iter->data_ptr) >= BL_ITEM_EXPIRE_TIME) {
black_expired_sum++;
fht_remove_iter(black_iter); // Record has expired
continue;
}
}
// Check whitelist DB
fht_reinit_iter(white_iter);
// Cycle through every item in blacklist DB
while (fht_get_next_iter(white_iter) == FHT_ITER_RET_OK) {
if (STOP) {
DEBUG_PRINT("STOP signal detected\n");
break;
}
// Check timestamp if it is permanent
if (*((uint32_t*)white_iter->data_ptr) == BWL_PERMANENT_RECORD) {
continue; // Permanent records do not expire
}
// Check timestamp if it expired
if (CURRENT_TIME - *((uint32_t*)white_iter->data_ptr) >= WL_ITEM_EXPIRE_TIME) {
white_expired_sum++;
fht_remove_iter(white_iter); // Record has expired
continue;
}
}
DEBUG_PRINT("Expired items in lists: black = %u, white = %u\n", black_expired_sum, white_expired_sum);
// Wait for next iteration
if (!STOP) {
sleep(BWL_LIST_EXPIRE_SLEEP_DURATION);
}
}
DEBUG_PRINT("Terminating list timeout thread\n");
return NULL;
}
/**
* \brief Thread for checking, exporting and removing suspects from database.
* \param data Nothing, null.
* \return Nothing, null.
*/
void *check_thread(void *data)
{
ip_addr_t *miner_ip, *pool_ip;
uint16_t port;
char buff[128];
fht_iter_t *iter = fht_init_iter(SUSPECT_DB);
// Cycle through suspect database and check for suspects with high score
while(!STOP) {
fht_reinit_iter(iter);
time_t timestamp = CURRENT_TIME;
struct tm tmp_tm;
char timestr[200];
strftime(timestr, 200, "%Y-%m-%dT%H:%M:%S", localtime_r(×tamp, &tmp_tm));
DEBUG_PRINT("[%s] New round of passive testing\n", timestr);
// Cycle through every suspect in DB
while (fht_get_next_iter(iter) == FHT_ITER_RET_OK) {
bool blacklisted_flag = false;
if (STOP) {
DEBUG_PRINT("STOP signal detected\n");
break;
}
// Get IP addresses and port from iterator
miner_ip = &((suspect_item_key_t*)iter->key_ptr)->suspect_ip;
pool_ip = &((suspect_item_key_t*)iter->key_ptr)->pool_ip;
port = ((suspect_item_key_t*)iter->key_ptr)->port;
list_key_t key;
memset(&key, 0, sizeof(list_key_t));
key.ip = *pool_ip;
key.port = port;
// Check if pool IP is in blacklist database
if (fht_get_data(BLACKLIST_DB, &key)) {
blacklisted_flag = true;
((suspect_item_t*)iter->data_ptr)->flagged = true;
} // Check if pool IP is in the whitelist database
else if (fht_get_data(WHITELIST_DB, &key)) {
// Remove suspect from database
fht_remove_iter(iter);
continue;
} else {
// Check score
uint32_t score = compute_suspect_score(*(suspect_item_t*)iter->data_ptr);
uint8_t weka_flag = compute_weka_tree(*(suspect_item_t*)iter->data_ptr);
if (score >= SUSPECT_SCORE_THRESHOLD && weka_flag) {
int ret;
uint32_t timestamp = CURRENT_TIME;
uint8_t pool_id;
if (CHECK_STRATUM_FLAG) {
// Check pool IP if it support stratum protocol
ip_to_str(pool_ip, buff);
if ((ret = stratum_check_server(buff, port, &pool_id)) == STRATUM_MATCH) {
// Add pool IP to blacklist
DEBUG_PRINT("Stratum detected(%s), blacklisting!\n", stratum_mpool_string(pool_id));
ret = fht_insert(BLACKLIST_DB, &key, ×tamp, NULL, NULL);
blacklisted_flag = true;
((suspect_item_t*)iter->data_ptr)->pool_id = pool_id;
((suspect_item_t*)iter->data_ptr)->flagged = true;
} else {
// Add pool IP to whitelist
DEBUG_PRINT("Stratum not detected(%s), whitelisting!\n", stratum_error_string(ret));
ret = fht_insert(WHITELIST_DB, &key, ×tamp, NULL, NULL);
fht_remove_iter(iter);
continue;
}
} else {
// DEBUG
/*if (fht_get_data(BLACKLIST_DB, &key)) {
DEBUG_PRINT("Stratum detected(-), blacklisting!\n");
blacklisted_flag = true;
((suspect_item_t*)iter->data_ptr)->flagged = true;
ret = FHT_INSERT_OK;
} else {
//DEBUG_PRINT("Stratum not detected(-), whitelisting!\n");
ret = fht_insert(WHITELIST_DB, &key, ×tamp, NULL, NULL);
fht_remove_iter(iter);
continue;
}*/
// Not checking for stratum, rely only on score
ret = STRATUM_NOT_USED; //FHT_INSERT_OK;//ret = fht_insert(BLACKLIST_DB, &key, &value, NULL, NULL);
}
// Check insert to DB
switch (ret) {
case STRATUM_NOT_USED: // Not using stratum checker
break;
case FHT_INSERT_OK: // Insert was successfull
break;
case FHT_INSERT_LOST: // Insert kicked out item
DEBUG_PRINT("Some item was kicked out from W/BList DB due to inserting new one.\n");
break;
case FHT_INSERT_FAILED: // Item with same key is already in the table, this can not happen or can?
DEBUG_PRINT("Inserting failed!\n");
break;
}
}
}
// For every item in suspect db, check if expired (INACTIVE TIMEOUT)
if (CURRENT_TIME - ((suspect_item_t*)iter->data_ptr)->last_seen >= TIMEOUT_INACTIVE) {
// Inactive timeout expired
if (blacklisted_flag) {
SENDER->send(*miner_ip, *pool_ip, port, ((suspect_item_t*)iter->data_ptr)->first_seen,((suspect_item_t*)iter->data_ptr)->last_seen, ((suspect_item_t*)iter->data_ptr)->packets);
}
fht_remove_iter(iter);
continue;
}
// Check flow last seen timestamp (ACTIVE TIMEOUT)
if (CURRENT_TIME - ((suspect_item_t*)iter->data_ptr)->last_exported >= TIMEOUT_EXPORT) {
// Export timeout expired, send data to output
if (blacklisted_flag) {
SENDER->send(*miner_ip, *pool_ip, port, ((suspect_item_t*)iter->data_ptr)->first_seen, ((suspect_item_t*)iter->data_ptr)->last_seen, ((suspect_item_t*)iter->data_ptr)->packets);
// Reset last exported time
((suspect_item_t*)iter->data_ptr)->last_exported = CURRENT_TIME;
} else {
fht_remove_iter(iter);
continue;
}
}
}
if (!STOP) {
sleep(CHECK_THREAD_SLEEP_PERIOD);
}
}
// Free iterator
fht_destroy_iter(iter);
// We are terminating, export every blacklisted suspect
export_suspects();
// Write current blacklist/whitelist database to file for further use
store_list_db(BLACKLIST_DB, BL_STORE_FILE);