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/* |
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* The ManaPlus Client |
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* Copyright (C) 2011-2019 The ManaPlus Developers |
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* Copyright (C) 2019-2021 Andrei Karas |
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* |
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* This file is part of The ManaPlus Client. |
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* |
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* This program 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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* any later version. |
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* |
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* This program 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 program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#include "net/packetlimiter.h" |
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#include "configuration.h" |
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#include "settings.h" |
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#include "utils/cast.h" |
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#include "utils/checkutils.h" |
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#include "utils/timer.h" |
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#include <fstream> |
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#include <sys/stat.h> |
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#include "debug.h" |
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struct PacketLimit final |
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{ |
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A_DEFAULT_COPY(PacketLimit) |
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int lastTime; |
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int timeLimit; |
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int cnt; |
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int cntLimit; |
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}; |
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PacketLimit mPacketLimits[CAST_SIZE(PacketType::PACKET_SIZE) + 1]; |
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void PacketLimiter::initPacketLimiter() |
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{ |
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// here i setting packet limits. but current server is broken, |
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// and this limits may not help. |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_CHAT)].timeLimit = 10 + 5; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_CHAT)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_CHAT)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_CHAT)].cnt = 0; |
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// 10 |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_PICKUP)].timeLimit = 10 + 5; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_PICKUP)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_PICKUP)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_PICKUP)].cnt = 0; |
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// 10 5 |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DROP)].timeLimit = 5; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DROP)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DROP)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DROP)].cnt = 0; |
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// 100 |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_NEXT)].timeLimit = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_NEXT)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_NEXT)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_NEXT)].cnt = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_INPUT)].timeLimit = 100; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_INPUT)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_INPUT)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_INPUT)].cnt = 0; |
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// 50 |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_TALK)].timeLimit = 60; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_TALK)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_TALK)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_NPC_TALK)].cnt = 0; |
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// 10 |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_EMOTE)].timeLimit = 10 + 5; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_EMOTE)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_EMOTE)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_EMOTE)].cnt = 0; |
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// 100 |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_SIT)].timeLimit = 100; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_SIT)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_SIT)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_SIT)].cnt = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DIRECTION)].timeLimit = 50; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DIRECTION)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DIRECTION)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_DIRECTION)].cnt = 0; |
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// 2+ |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ATTACK)].timeLimit = 2 + 10; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ATTACK)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ATTACK)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ATTACK)].cnt = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_STOPATTACK)].timeLimit = 2 + 10; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_STOPATTACK)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_STOPATTACK)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_STOPATTACK)].cnt = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ONLINELIST)].timeLimit = 1800; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ONLINELIST)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ONLINELIST)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_ONLINELIST)].cnt = 0; |
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// 300ms + 50 fix |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_WHISPER)].timeLimit = 30 + 5; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_WHISPER)].lastTime = 0; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_WHISPER)].cntLimit = 1; |
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mPacketLimits[CAST_SIZE( |
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PacketType::PACKET_WHISPER)].cnt = 0; |
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if (!settings.serverConfigDir.empty()) |
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{ |
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const std::string packetLimitsName = settings.serverConfigDir |
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+ "/packetlimiter.txt"; |
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std::ifstream inPacketFile; |
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struct stat statbuf; |
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if ((stat(packetLimitsName.c_str(), &statbuf) != 0) |
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|| !S_ISREG(statbuf.st_mode)) |
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{ |
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// wtiting new file |
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writePacketLimits(packetLimitsName); |
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} |
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else |
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{ // reading existent file |
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inPacketFile.open(packetLimitsName.c_str(), std::ios::in); |
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char line[101]; |
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if (!inPacketFile.is_open() || !inPacketFile.getline(line, 100)) |
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{ |
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inPacketFile.close(); |
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return; |
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} |
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const int ver = atoi(line); |
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for (int f = 0; |
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f < CAST_S32(PacketType::PACKET_SIZE); |
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f ++) |
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{ |
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if (!inPacketFile.getline(line, 100)) |
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break; |
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if (!(ver == 1 && |
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(static_cast<PacketTypeT>(f) == PacketType::PACKET_DROP || |
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static_cast<PacketTypeT>(f) |
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== PacketType::PACKET_NPC_NEXT))) |
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{ |
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mPacketLimits[f].timeLimit = atoi(line); |
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} |
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} |
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inPacketFile.close(); |
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if (ver < 5) |
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writePacketLimits(packetLimitsName); |
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} |
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} |
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} |
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void PacketLimiter::writePacketLimits(const std::string &packetLimitsName) |
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{ |
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std::ofstream outPacketFile; |
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outPacketFile.open(packetLimitsName.c_str(), std::ios::out); |
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if (!outPacketFile.is_open()) |
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{ |
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reportAlways("Error opening file for writing: %s", |
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packetLimitsName.c_str()) |
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outPacketFile.close(); |
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return; |
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} |
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outPacketFile << "4" << std::endl; |
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for (int f = 0; f < CAST_S32(PacketType::PACKET_SIZE); f ++) |
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{ |
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outPacketFile << toString(mPacketLimits[f].timeLimit) |
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<< std::endl; |
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} |
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outPacketFile.close(); |
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} |
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bool PacketLimiter::checkPackets(const PacketTypeT type) |
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{ |
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if (type > PacketType::PACKET_SIZE) |
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return false; |
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if (!serverConfig.getValueBool("enableBuggyServers", true)) |
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return true; |
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const PacketLimit &limit = mPacketLimits[CAST_SIZE(type)]; |
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const int timeLimit = limit.timeLimit; |
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if (timeLimit == 0) |
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return true; |
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const int time = tick_time; |
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const int lastTime = limit.lastTime; |
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const int cnt = limit.cnt; |
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const int cntLimit = limit.cntLimit; |
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if (lastTime > tick_time) |
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{ |
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// instance()->mPacketLimits[type].lastTime = time; |
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// instance()->mPacketLimits[type].cnt = 0; |
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return true; |
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} |
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else if (lastTime + timeLimit > time) |
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{ |
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if (cnt >= cntLimit) |
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{ |
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return false; |
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} |
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// instance()->mPacketLimits[type].cnt ++; |
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return true; |
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} |
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// instance()->mPacketLimits[type].lastTime = time; |
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// instance()->mPacketLimits[type].cnt = 1; |
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return true; |
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} |
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bool PacketLimiter::limitPackets(const PacketTypeT type) |
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{ |
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if (CAST_S32(type) < 0 || type > PacketType::PACKET_SIZE) |
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return false; |
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if (!serverConfig.getValueBool("enableBuggyServers", true)) |
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return true; |
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PacketLimit &pack = mPacketLimits[CAST_SIZE(type)]; |
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const int timeLimit = pack.timeLimit; |
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if (timeLimit == 0) |
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return true; |
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const int time = tick_time; |
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const int lastTime = pack.lastTime; |
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const int cnt = pack.cnt; |
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const int cntLimit = pack.cntLimit; |
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if (lastTime > tick_time) |
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{ |
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pack.lastTime = time; |
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pack.cnt = 0; |
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return true; |
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} |
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else if (lastTime + timeLimit > time) |
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{ |
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if (cnt >= cntLimit) |
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{ |
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return false; |
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} |
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pack.cnt ++; |
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return true; |
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} |
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pack.lastTime = time; |
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pack.cnt = 1; |
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return true; |
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} |