mirror of
https://github.com/kasmtech/KasmVNC.git
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83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
/* Copyright (C) 2021 Kasm
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <arpa/inet.h>
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#include <errno.h>
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#include <netinet/tcp.h>
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#include <netdb.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <time.h>
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#include <map>
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#include <string>
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#include <network/Blacklist.h>
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#include <rfb/Blacklist.h>
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static std::map<std::string, unsigned> hits;
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static std::map<std::string, time_t> blacklist;
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static pthread_mutex_t hitmutex = PTHREAD_MUTEX_INITIALIZER;
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static pthread_mutex_t blmutex = PTHREAD_MUTEX_INITIALIZER;
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unsigned char bl_isBlacklisted(const char *addr) {
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const unsigned char count = blacklist.count(addr);
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if (!count)
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return 0;
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const time_t now = time(NULL);
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const unsigned timeout = rfb::Blacklist::initialTimeout;
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if (pthread_mutex_lock(&blmutex))
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abort();
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if (now - timeout > blacklist[addr]) {
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blacklist.erase(addr);
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pthread_mutex_unlock(&blmutex);
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if (pthread_mutex_lock(&hitmutex))
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abort();
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hits.erase(addr);
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pthread_mutex_unlock(&hitmutex);
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return 0;
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} else {
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blacklist[addr] = now;
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pthread_mutex_unlock(&blmutex);
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return 1;
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}
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}
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void bl_addFailure(const char *addr) {
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if (pthread_mutex_lock(&hitmutex))
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abort();
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const unsigned num = ++hits[addr];
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pthread_mutex_unlock(&hitmutex);
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if (num >= (unsigned) rfb::Blacklist::threshold) {
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if (pthread_mutex_lock(&blmutex))
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abort();
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blacklist[addr] = time(NULL);
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pthread_mutex_unlock(&blmutex);
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}
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}
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