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290 lines
8.2 KiB
C++
290 lines
8.2 KiB
C++
/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
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/* If you are missing that file, acquire a complete release at teeworlds.com. */
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#include <base/system.h>
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#include <engine/shared/network.h>
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#include <engine/shared/config.h>
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#include <engine/console.h>
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#include <engine/masterserver.h>
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#include <mastersrv/mastersrv.h>
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#include "register.h"
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CRegister::CRegister()
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{
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m_pNetServer = 0;
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m_pMasterServer = 0;
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m_pConsole = 0;
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m_RegisterState = REGISTERSTATE_START;
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m_RegisterStateStart = 0;
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m_RegisterFirst = 1;
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m_RegisterCount = 0;
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mem_zero(m_aMasterserverInfo, sizeof(m_aMasterserverInfo));
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m_RegisterRegisteredServer = -1;
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}
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void CRegister::RegisterNewState(int State)
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{
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m_RegisterState = State;
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m_RegisterStateStart = time_get();
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}
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void CRegister::RegisterSendFwcheckresponse(NETADDR *pAddr)
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{
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CNetChunk Packet;
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Packet.m_ClientID = -1;
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Packet.m_Address = *pAddr;
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Packet.m_Flags = NETSENDFLAG_CONNLESS;
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Packet.m_DataSize = sizeof(SERVERBROWSE_FWRESPONSE);
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Packet.m_pData = SERVERBROWSE_FWRESPONSE;
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m_pNetServer->Send(&Packet);
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}
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void CRegister::RegisterSendHeartbeat(NETADDR Addr)
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{
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static unsigned char aData[sizeof(SERVERBROWSE_HEARTBEAT) + 2];
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unsigned short Port = g_Config.m_SvPort;
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CNetChunk Packet;
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mem_copy(aData, SERVERBROWSE_HEARTBEAT, sizeof(SERVERBROWSE_HEARTBEAT));
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Packet.m_ClientID = -1;
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Packet.m_Address = Addr;
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Packet.m_Flags = NETSENDFLAG_CONNLESS;
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Packet.m_DataSize = sizeof(SERVERBROWSE_HEARTBEAT) + 2;
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Packet.m_pData = &aData;
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// supply the set port that the master can use if it has problems
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if(g_Config.m_SvExternalPort)
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Port = g_Config.m_SvExternalPort;
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aData[sizeof(SERVERBROWSE_HEARTBEAT)] = Port >> 8;
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aData[sizeof(SERVERBROWSE_HEARTBEAT)+1] = Port&0xff;
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m_pNetServer->Send(&Packet);
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}
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void CRegister::RegisterSendCountRequest(NETADDR Addr)
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{
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CNetChunk Packet;
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Packet.m_ClientID = -1;
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Packet.m_Address = Addr;
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Packet.m_Flags = NETSENDFLAG_CONNLESS;
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Packet.m_DataSize = sizeof(SERVERBROWSE_GETCOUNT);
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Packet.m_pData = SERVERBROWSE_GETCOUNT;
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m_pNetServer->Send(&Packet);
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}
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void CRegister::RegisterGotCount(CNetChunk *pChunk)
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{
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unsigned char *pData = (unsigned char *)pChunk->m_pData;
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int Count = (pData[sizeof(SERVERBROWSE_COUNT)]<<8) | pData[sizeof(SERVERBROWSE_COUNT)+1];
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for(int i = 0; i < IMasterServer::MAX_MASTERSERVERS; i++)
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{
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if(net_addr_comp(&m_aMasterserverInfo[i].m_Addr, &pChunk->m_Address) == 0)
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{
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m_aMasterserverInfo[i].m_Count = Count;
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break;
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}
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}
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}
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void CRegister::Init(CNetServer *pNetServer, IEngineMasterServer *pMasterServer, IConsole *pConsole)
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{
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m_pNetServer = pNetServer;
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m_pMasterServer = pMasterServer;
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m_pConsole = pConsole;
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}
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void CRegister::RegisterUpdate()
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{
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int64 Now = time_get();
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int64 Freq = time_freq();
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if(!g_Config.m_SvRegister)
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return;
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m_pMasterServer->Update();
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if(m_RegisterState == REGISTERSTATE_START)
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{
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m_RegisterCount = 0;
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m_RegisterFirst = 1;
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RegisterNewState(REGISTERSTATE_UPDATE_ADDRS);
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m_pMasterServer->RefreshAddresses();
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "refreshing ip addresses");
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}
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else if(m_RegisterState == REGISTERSTATE_UPDATE_ADDRS)
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{
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m_RegisterRegisteredServer = -1;
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if(!m_pMasterServer->IsRefreshing())
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{
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int i;
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for(i = 0; i < IMasterServer::MAX_MASTERSERVERS; i++)
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{
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if(!m_pMasterServer->IsValid(i))
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{
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m_aMasterserverInfo[i].m_Valid = 0;
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m_aMasterserverInfo[i].m_Count = 0;
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continue;
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}
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NETADDR Addr = m_pMasterServer->GetAddr(i);
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m_aMasterserverInfo[i].m_Addr = Addr;
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m_aMasterserverInfo[i].m_Valid = 1;
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m_aMasterserverInfo[i].m_Count = -1;
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m_aMasterserverInfo[i].m_LastSend = 0;
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}
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "fetching server counts");
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RegisterNewState(REGISTERSTATE_QUERY_COUNT);
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}
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}
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else if(m_RegisterState == REGISTERSTATE_QUERY_COUNT)
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{
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int Left = 0;
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for(int i = 0; i < IMasterServer::MAX_MASTERSERVERS; i++)
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{
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if(!m_aMasterserverInfo[i].m_Valid)
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continue;
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if(m_aMasterserverInfo[i].m_Count == -1)
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{
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Left++;
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if(m_aMasterserverInfo[i].m_LastSend+Freq < Now)
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{
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m_aMasterserverInfo[i].m_LastSend = Now;
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RegisterSendCountRequest(m_aMasterserverInfo[i].m_Addr);
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}
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}
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}
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// check if we are done or timed out
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if(Left == 0 || Now > m_RegisterStateStart+Freq*3)
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{
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// choose server
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int Best = -1;
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int i;
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for(i = 0; i < IMasterServer::MAX_MASTERSERVERS; i++)
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{
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if(!m_aMasterserverInfo[i].m_Valid || m_aMasterserverInfo[i].m_Count == -1)
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continue;
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if(Best == -1 || m_aMasterserverInfo[i].m_Count < m_aMasterserverInfo[Best].m_Count)
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Best = i;
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}
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// server chosen
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m_RegisterRegisteredServer = Best;
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if(m_RegisterRegisteredServer == -1)
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{
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "WARNING: No master servers. Retrying in 60 seconds");
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RegisterNewState(REGISTERSTATE_ERROR);
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}
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else
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{
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char aBuf[256];
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str_format(aBuf, sizeof(aBuf), "chose '%s' as master, sending heartbeats", m_pMasterServer->GetName(m_RegisterRegisteredServer));
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", aBuf);
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m_aMasterserverInfo[m_RegisterRegisteredServer].m_LastSend = 0;
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RegisterNewState(REGISTERSTATE_HEARTBEAT);
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}
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}
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}
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else if(m_RegisterState == REGISTERSTATE_HEARTBEAT)
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{
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// check if we should send heartbeat
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if(Now > m_aMasterserverInfo[m_RegisterRegisteredServer].m_LastSend+Freq*15)
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{
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m_aMasterserverInfo[m_RegisterRegisteredServer].m_LastSend = Now;
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RegisterSendHeartbeat(m_aMasterserverInfo[m_RegisterRegisteredServer].m_Addr);
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}
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if(Now > m_RegisterStateStart+Freq*60)
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{
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "WARNING: Master server is not responding, switching master");
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RegisterNewState(REGISTERSTATE_START);
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}
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}
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else if(m_RegisterState == REGISTERSTATE_REGISTERED)
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{
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if(m_RegisterFirst)
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "server registered");
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m_RegisterFirst = 0;
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// check if we should send new heartbeat again
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if(Now > m_RegisterStateStart+Freq)
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{
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if(m_RegisterCount == 120) // redo the whole process after 60 minutes to balance out the master servers
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RegisterNewState(REGISTERSTATE_START);
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else
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{
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m_RegisterCount++;
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RegisterNewState(REGISTERSTATE_HEARTBEAT);
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}
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}
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}
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else if(m_RegisterState == REGISTERSTATE_ERROR)
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{
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// check for restart
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if(Now > m_RegisterStateStart+Freq*60)
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RegisterNewState(REGISTERSTATE_START);
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}
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}
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int CRegister::RegisterProcessPacket(CNetChunk *pPacket)
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{
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// check for masterserver address
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bool Valid = false;
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NETADDR Addr1 = pPacket->m_Address;
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Addr1.port = 0;
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for(int i = 0; i < IMasterServer::MAX_MASTERSERVERS; i++)
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{
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NETADDR Addr2 = m_aMasterserverInfo[i].m_Addr;
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Addr2.port = 0;
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if(net_addr_comp(&Addr1, &Addr2) == 0)
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{
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Valid = true;
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break;
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}
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}
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if(!Valid)
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return 0;
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if(pPacket->m_DataSize == sizeof(SERVERBROWSE_FWCHECK) &&
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mem_comp(pPacket->m_pData, SERVERBROWSE_FWCHECK, sizeof(SERVERBROWSE_FWCHECK)) == 0)
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{
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RegisterSendFwcheckresponse(&pPacket->m_Address);
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return 1;
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}
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else if(pPacket->m_DataSize == sizeof(SERVERBROWSE_FWOK) &&
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mem_comp(pPacket->m_pData, SERVERBROWSE_FWOK, sizeof(SERVERBROWSE_FWOK)) == 0)
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{
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if(m_RegisterFirst)
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "no firewall/nat problems detected");
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RegisterNewState(REGISTERSTATE_REGISTERED);
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return 1;
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}
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else if(pPacket->m_DataSize == sizeof(SERVERBROWSE_FWERROR) &&
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mem_comp(pPacket->m_pData, SERVERBROWSE_FWERROR, sizeof(SERVERBROWSE_FWERROR)) == 0)
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{
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", "ERROR: the master server reports that clients can not connect to this server.");
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char aBuf[256];
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str_format(aBuf, sizeof(aBuf), "ERROR: configure your firewall/nat to let through udp on port %d.", g_Config.m_SvPort);
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m_pConsole->Print(IConsole::OUTPUT_LEVEL_STANDARD, "register", aBuf);
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RegisterNewState(REGISTERSTATE_ERROR);
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return 1;
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}
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else if(pPacket->m_DataSize == sizeof(SERVERBROWSE_COUNT)+2 &&
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mem_comp(pPacket->m_pData, SERVERBROWSE_COUNT, sizeof(SERVERBROWSE_COUNT)) == 0)
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{
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RegisterGotCount(pPacket);
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return 1;
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}
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return 0;
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}
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