src/ban.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4 Copyright (C) 2018 nerzhul, Loic BLOT <loic.blot@unix-experience.fr>
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU Lesser General Public License as published by
   8 the Free Software Foundation; either version 2.1 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU Lesser General Public License for more details.
  15
  16 You should have received a copy of the GNU Lesser General Public License along
  17 with this program; if not, write to the Free Software Foundation, Inc.,
  18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #include "ban.h"
  22 #include <fstream>
  23 #include "threading/mutex_auto_lock.h"
  24 #include <sstream>
  25 #include <set>
  26 #include "util/strfnd.h"
  27 #include "util/string.h"
  28 #include "log.h"
  29 #include "filesys.h"
  30
  31 BanManager::BanManager(const std::string &banfilepath):
  32                 m_banfilepath(banfilepath)
  33 {
  34         try {
  35                 load();
  36         } catch(SerializationError &e) {
  37                 infostream << "BanManager: creating "
  38                                 << m_banfilepath << std::endl;
  39         }
  40 }
  41
  42 BanManager::~BanManager()
  43 {
  44         save();
  45 }
  46
  47 void BanManager::load()
  48 {
  49         MutexAutoLock lock(m_mutex);
  50         infostream<<"BanManager: loading from "<<m_banfilepath<<std::endl;
  51         std::ifstream is(m_banfilepath.c_str(), std::ios::binary);
  52         if (!is.good()) {
  53                 infostream<<"BanManager: failed loading from "<<m_banfilepath<<std::endl;
  54                 throw SerializationError("BanManager::load(): Couldn't open file");
  55         }
  56
  57         while (!is.eof() && is.good()) {
  58                 std::string line;
  59                 std::getline(is, line, '\n');
  60                 Strfnd f(line);
  61                 std::string ip = trim(f.next("|"));
  62                 std::string name = trim(f.next("|"));
  63                 if(!ip.empty()) {
  64                         m_ips[ip] = name;
  65                 }
  66         }
  67         m_modified = false;
  68 }
  69
  70 void BanManager::save()
  71 {
  72         MutexAutoLock lock(m_mutex);
  73         infostream << "BanManager: saving to " << m_banfilepath << std::endl;
  74         std::ostringstream ss(std::ios_base::binary);
  75
  76         for (const auto &ip : m_ips)
  77                 ss << ip.first << "|" << ip.second << "\n";
  78
  79         if (!fs::safeWriteToFile(m_banfilepath, ss.str())) {
  80                 infostream << "BanManager: failed saving to " << m_banfilepath << std::endl;
  81                 throw SerializationError("BanManager::save(): Couldn't write file");
  82         }
  83
  84         m_modified = false;
  85 }
  86
  87 bool BanManager::isIpBanned(const std::string &ip)
  88 {
  89         MutexAutoLock lock(m_mutex);
  90         return m_ips.find(ip) != m_ips.end();
  91 }
  92
  93 std::string BanManager::getBanDescription(const std::string &ip_or_name)
  94 {
  95         MutexAutoLock lock(m_mutex);
  96         std::string s;
  97         for (const auto &ip : m_ips) {
  98                 if (ip.first  == ip_or_name || ip.second == ip_or_name
  99                                 || ip_or_name.empty()) {
 100                         s += ip.first + "|" + ip.second + ", ";
 101                 }
 102         }
 103         s = s.substr(0, s.size() - 2);
 104         return s;
 105 }
 106
 107 std::string BanManager::getBanName(const std::string &ip)
 108 {
 109         MutexAutoLock lock(m_mutex);
 110         StringMap::iterator it = m_ips.find(ip);
 111         if (it == m_ips.end())
 112                 return "";
 113         return it->second;
 114 }
 115
 116 void BanManager::add(const std::string &ip, const std::string &name)
 117 {
 118         MutexAutoLock lock(m_mutex);
 119         m_ips[ip] = name;
 120         m_modified = true;
 121 }
 122
 123 void BanManager::remove(const std::string &ip_or_name)
 124 {
 125         MutexAutoLock lock(m_mutex);
 126         for (StringMap::iterator it = m_ips.begin(); it != m_ips.end();) {
 127                 if ((it->first == ip_or_name) || (it->second == ip_or_name)) {
 128                         m_ips.erase(it++);
 129                         m_modified = true;
 130                 } else {
 131                         ++it;
 132                 }
 133         }
 134 }
 135
 136
 137 bool BanManager::isModified()
 138 {
 139         MutexAutoLock lock(m_mutex);
 140         return m_modified;
 141 }
 142