diff options
Diffstat (limited to 'NorthstarDLL/shared/exploit_fixes/ns_limits.cpp')
| -rw-r--r-- | NorthstarDLL/shared/exploit_fixes/ns_limits.cpp | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/NorthstarDLL/shared/exploit_fixes/ns_limits.cpp b/NorthstarDLL/shared/exploit_fixes/ns_limits.cpp deleted file mode 100644 index bd855ee4..00000000 --- a/NorthstarDLL/shared/exploit_fixes/ns_limits.cpp +++ /dev/null @@ -1,298 +0,0 @@ -#include "ns_limits.h" -#include "engine/hoststate.h" -#include "client/r2client.h" -#include "engine/r2engine.h" -#include "server/r2server.h" -#include "core/tier0.h" -#include "core/math/vector.h" -#include "server/auth/serverauthentication.h" - -AUTOHOOK_INIT() - -ServerLimitsManager* g_pServerLimits; - -float (*CEngineServer__GetTimescale)(); - -// todo: make this work on higher timescales, also possibly disable when sv_cheats is set -void ServerLimitsManager::RunFrame(double flCurrentTime, float flFrameTime) -{ - if (Cvar_sv_antispeedhack_enable->GetBool()) - { - // for each player, set their usercmd processing budget for the frame to the last frametime for the server - for (int i = 0; i < g_pGlobals->m_nMaxClients; i++) - { - CBaseClient* player = &g_pClientArray[i]; - - if (m_PlayerLimitData.find(player) != m_PlayerLimitData.end()) - { - PlayerLimitData* pLimitData = &g_pServerLimits->m_PlayerLimitData[player]; - if (pLimitData->flFrameUserCmdBudget < g_pGlobals->m_flTickInterval * Cvar_sv_antispeedhack_maxtickbudget->GetFloat()) - { - pLimitData->flFrameUserCmdBudget += g_pServerLimits->Cvar_sv_antispeedhack_budgetincreasemultiplier->GetFloat() * - fmax(flFrameTime, g_pGlobals->m_flFrameTime * CEngineServer__GetTimescale()); - } - } - } - } -} - -void ServerLimitsManager::AddPlayer(CBaseClient* player) -{ - PlayerLimitData limitData; - limitData.flFrameUserCmdBudget = - g_pGlobals->m_flTickInterval * CEngineServer__GetTimescale() * Cvar_sv_antispeedhack_maxtickbudget->GetFloat(); - - m_PlayerLimitData.insert(std::make_pair(player, limitData)); -} - -void ServerLimitsManager::RemovePlayer(CBaseClient* player) -{ - if (m_PlayerLimitData.find(player) != m_PlayerLimitData.end()) - m_PlayerLimitData.erase(player); -} - -bool ServerLimitsManager::CheckStringCommandLimits(CBaseClient* player) -{ - if (CVar_sv_quota_stringcmdspersecond->GetInt() != -1) - { - // note: this isn't super perfect, legit clients can trigger it in lobby if they try, mostly good enough tho imo - if (Plat_FloatTime() - m_PlayerLimitData[player].lastClientCommandQuotaStart >= 1.0) - { - // reset quota - m_PlayerLimitData[player].lastClientCommandQuotaStart = Plat_FloatTime(); - m_PlayerLimitData[player].numClientCommandsInQuota = 0; - } - - m_PlayerLimitData[player].numClientCommandsInQuota++; - if (m_PlayerLimitData[player].numClientCommandsInQuota > CVar_sv_quota_stringcmdspersecond->GetInt()) - { - // too many stringcmds, dc player - return false; - } - } - - return true; -} - -bool ServerLimitsManager::CheckChatLimits(CBaseClient* player) -{ - if (Plat_FloatTime() - m_PlayerLimitData[player].lastSayTextLimitStart >= 1.0) - { - m_PlayerLimitData[player].lastSayTextLimitStart = Plat_FloatTime(); - m_PlayerLimitData[player].sayTextLimitCount = 0; - } - - if (m_PlayerLimitData[player].sayTextLimitCount >= Cvar_sv_max_chat_messages_per_sec->GetInt()) - return false; - - m_PlayerLimitData[player].sayTextLimitCount++; - return true; -} - -// clang-format off -AUTOHOOK(CNetChan__ProcessMessages, engine.dll + 0x2140A0, -char, __fastcall, (void* self, void* buf)) -// clang-format on -{ - enum eNetChanLimitMode - { - NETCHANLIMIT_WARN, - NETCHANLIMIT_KICK - }; - - double startTime = Plat_FloatTime(); - char ret = CNetChan__ProcessMessages(self, buf); - - // check processing limits, unless we're in a level transition - if (g_pHostState->m_iCurrentState == HostState_t::HS_RUN && ThreadInServerFrameThread()) - { - // player that sent the message - CBaseClient* sender = *(CBaseClient**)((char*)self + 368); - - // if no sender, return - // relatively certain this is fine? - if (!sender || !g_pServerLimits->m_PlayerLimitData.count(sender)) - return ret; - - // reset every second - if (startTime - g_pServerLimits->m_PlayerLimitData[sender].lastNetChanProcessingLimitStart >= 1.0 || - g_pServerLimits->m_PlayerLimitData[sender].lastNetChanProcessingLimitStart == -1.0) - { - g_pServerLimits->m_PlayerLimitData[sender].lastNetChanProcessingLimitStart = startTime; - g_pServerLimits->m_PlayerLimitData[sender].netChanProcessingLimitTime = 0.0; - } - g_pServerLimits->m_PlayerLimitData[sender].netChanProcessingLimitTime += (Plat_FloatTime() * 1000) - (startTime * 1000); - - if (g_pServerLimits->m_PlayerLimitData[sender].netChanProcessingLimitTime >= - g_pServerLimits->Cvar_net_chan_limit_msec_per_sec->GetInt()) - { - spdlog::warn( - "Client {} hit netchan processing limit with {}ms of processing time this second (max is {})", - (char*)sender + 0x16, - g_pServerLimits->m_PlayerLimitData[sender].netChanProcessingLimitTime, - g_pServerLimits->Cvar_net_chan_limit_msec_per_sec->GetInt()); - - // never kick local player - if (g_pServerLimits->Cvar_net_chan_limit_mode->GetInt() != NETCHANLIMIT_WARN && strcmp(g_pLocalPlayerUserID, sender->m_UID)) - { - CBaseClient__Disconnect(sender, 1, "Exceeded net channel processing limit"); - return false; - } - } - } - - return ret; -} - -bool ServerLimitsManager::CheckConnectionlessPacketLimits(netpacket_t* packet) -{ - static const ConVar* Cvar_net_data_block_enabled = g_pCVar->FindVar("net_data_block_enabled"); - - // don't ratelimit datablock packets as long as datablock is enabled - if (packet->adr.type == NA_IP && - (!(packet->data[4] == 'N' && Cvar_net_data_block_enabled->GetBool()) || !Cvar_net_data_block_enabled->GetBool())) - { - // bad lookup: optimise later tm - UnconnectedPlayerLimitData* sendData = nullptr; - for (UnconnectedPlayerLimitData& foundSendData : g_pServerLimits->m_UnconnectedPlayerLimitData) - { - if (!memcmp(packet->adr.ip, foundSendData.ip, 16)) - { - sendData = &foundSendData; - break; - } - } - - if (!sendData) - { - sendData = &g_pServerLimits->m_UnconnectedPlayerLimitData.emplace_back(); - memcpy(sendData->ip, packet->adr.ip, 16); - } - - if (Plat_FloatTime() < sendData->timeoutEnd) - return false; - - if (Plat_FloatTime() - sendData->lastQuotaStart >= 1.0) - { - sendData->lastQuotaStart = Plat_FloatTime(); - sendData->packetCount = 0; - } - - sendData->packetCount++; - - if (sendData->packetCount >= g_pServerLimits->Cvar_sv_querylimit_per_sec->GetInt()) - { - spdlog::warn( - "Client went over connectionless ratelimit of {} per sec with packet of type {}", - g_pServerLimits->Cvar_sv_querylimit_per_sec->GetInt(), - packet->data[4]); - - // timeout for a minute - sendData->timeoutEnd = Plat_FloatTime() + 60.0; - return false; - } - } - - return true; -} - -// this is weird and i'm not sure if it's correct, so not using for now -/*AUTOHOOK(CBasePlayer__PhysicsSimulate, server.dll + 0x5A6E50, bool, __fastcall, (void* self, int a2, char a3)) -{ - spdlog::info("CBasePlayer::PhysicsSimulate"); - return CBasePlayer__PhysicsSimulate(self, a2, a3); -}*/ - -struct alignas(4) SV_CUserCmd -{ - DWORD command_number; - DWORD tick_count; - float command_time; - Vector3 worldViewAngles; - BYTE gap18[4]; - Vector3 localViewAngles; - Vector3 attackangles; - Vector3 move; - DWORD buttons; - BYTE impulse; - short weaponselect; - DWORD meleetarget; - BYTE gap4C[24]; - char headoffset; - BYTE gap65[11]; - Vector3 cameraPos; - Vector3 cameraAngles; - BYTE gap88[4]; - int tickSomething; - DWORD dword90; - DWORD predictedServerEventAck; - DWORD dword98; - float frameTime; -}; - -// clang-format off -AUTOHOOK(CPlayerMove__RunCommand, server.dll + 0x5B8100, -void, __fastcall, (void* self, CBasePlayer* player, SV_CUserCmd* pUserCmd, uint64_t a4)) -// clang-format on -{ - if (g_pServerLimits->Cvar_sv_antispeedhack_enable->GetBool()) - { - CBaseClient* pClient = &g_pClientArray[player->m_nPlayerIndex - 1]; - - if (g_pServerLimits->m_PlayerLimitData.find(pClient) != g_pServerLimits->m_PlayerLimitData.end()) - { - PlayerLimitData* pLimitData = &g_pServerLimits->m_PlayerLimitData[pClient]; - - pLimitData->flFrameUserCmdBudget = fmax(0.0, pLimitData->flFrameUserCmdBudget - pUserCmd->frameTime); - - if (pLimitData->flFrameUserCmdBudget <= 0.0) - { - spdlog::warn("player {} went over usercmd budget ({})", pClient->m_Name, pLimitData->flFrameUserCmdBudget); - return; - } - } - } - - CPlayerMove__RunCommand(self, player, pUserCmd, a4); -} - -ON_DLL_LOAD_RELIESON("engine.dll", ServerLimits, ConVar, (CModule module)) -{ - AUTOHOOK_DISPATCH_MODULE(engine.dll) - - g_pServerLimits = new ServerLimitsManager; - - g_pServerLimits->CVar_sv_quota_stringcmdspersecond = new ConVar( - "sv_quota_stringcmdspersecond", - "60", - FCVAR_GAMEDLL, - "How many string commands per second clients are allowed to submit, 0 to disallow all string commands, -1 to disable"); - g_pServerLimits->Cvar_net_chan_limit_mode = - new ConVar("net_chan_limit_mode", "0", FCVAR_GAMEDLL, "The mode for netchan processing limits: 0 = warn, 1 = kick"); - g_pServerLimits->Cvar_net_chan_limit_msec_per_sec = new ConVar( - "net_chan_limit_msec_per_sec", - "100", - FCVAR_GAMEDLL, - "Netchannel processing is limited to so many milliseconds, abort connection if exceeding budget"); - g_pServerLimits->Cvar_sv_querylimit_per_sec = new ConVar("sv_querylimit_per_sec", "15", FCVAR_GAMEDLL, ""); - g_pServerLimits->Cvar_sv_max_chat_messages_per_sec = new ConVar("sv_max_chat_messages_per_sec", "5", FCVAR_GAMEDLL, ""); - g_pServerLimits->Cvar_sv_antispeedhack_enable = - new ConVar("sv_antispeedhack_enable", "0", FCVAR_NONE, "whether to enable antispeedhack protections"); - g_pServerLimits->Cvar_sv_antispeedhack_maxtickbudget = new ConVar( - "sv_antispeedhack_maxtickbudget", - "64", - FCVAR_GAMEDLL, - "Maximum number of client-issued usercmd ticks that can be replayed in packet loss conditions"); - g_pServerLimits->Cvar_sv_antispeedhack_budgetincreasemultiplier = new ConVar( - "sv_antispeedhack_budgetincreasemultiplier", - "1", - FCVAR_GAMEDLL, - "Increase usercmd processing budget by tickinterval * value per tick"); - - CEngineServer__GetTimescale = module.Offset(0x240840).RCast<float (*)()>(); -} - -ON_DLL_LOAD("server.dll", ServerLimitsServer, (CModule module)) -{ - AUTOHOOK_DISPATCH_MODULE(server.dll) -} |