Example #1
0
void CServer::ProcessClientPacket(CNetChunk *pPacket)
{
	int ClientID = pPacket->m_ClientID;
	CUnpacker Unpacker;
	Unpacker.Reset(pPacket->m_pData, pPacket->m_DataSize);

	// unpack msgid and system flag
	int Msg = Unpacker.GetInt();
	int Sys = Msg&1;
	Msg >>= 1;

	if(Unpacker.Error())
		return;

	if(Sys)
	{
		// system message
		if(Msg == NETMSG_INFO)
		{
			if(m_aClients[ClientID].m_State == CClient::STATE_AUTH)
			{
				char aVersion[64];
				str_copy(aVersion, Unpacker.GetString(CUnpacker::SANITIZE_CC), 64);
				bool CustClt = str_comp(aVersion, GameServer()->NetVersionCust()) == 0;
				dbg_msg("es", "%s client connected!", CustClt?"cust":"vanilla");
				if(!CustClt && str_comp(aVersion, GameServer()->NetVersion()) != 0)
				{
					// wrong version
					char aReason[256];
					str_format(aReason, sizeof(aReason), "Wrong version. Server is running '%s' and client '%s'", GameServer()->NetVersion(), aVersion);
					m_NetServer.Drop(ClientID, aReason);
					return;
				}

				const char *pPassword = Unpacker.GetString(CUnpacker::SANITIZE_CC);
				if(g_Config.m_Password[0] != 0 && str_comp(g_Config.m_Password, pPassword) != 0)
				{
					// wrong password
					m_NetServer.Drop(ClientID, "Wrong password");
					return;
				}

				m_aClients[ClientID].m_State = CClient::STATE_CONNECTING;
				m_aClients[ClientID].m_CustClt = CustClt;
				SendMap(ClientID);
			}
		}
		else if(Msg == NETMSG_REQUEST_MAP_DATA)
		{
			int Chunk = Unpacker.GetInt();
			int ChunkSize = 1024-128;
			int Offset = Chunk * ChunkSize;
			int Last = 0;

			// drop faulty map data requests
			if(Chunk < 0 || Offset > m_CurrentMapSize)
				return;

			if(Offset+ChunkSize >= m_CurrentMapSize)
			{
				ChunkSize = m_CurrentMapSize-Offset;
				if(ChunkSize < 0)
					ChunkSize = 0;
				Last = 1;
			}

			CMsgPacker Msg(NETMSG_MAP_DATA);
			Msg.AddInt(Last);
			Msg.AddInt(m_CurrentMapCrc);
			Msg.AddInt(Chunk);
			Msg.AddInt(ChunkSize);
			Msg.AddRaw(&m_pCurrentMapData[Offset], ChunkSize);
			SendMsgEx(&Msg, MSGFLAG_VITAL|MSGFLAG_FLUSH, ClientID, true);

			if(g_Config.m_Debug)
			{
				char aBuf[256];
				str_format(aBuf, sizeof(aBuf), "sending chunk %d with size %d", Chunk, ChunkSize);
				Console()->Print(IConsole::OUTPUT_LEVEL_DEBUG, "server", aBuf);
			}
		}
		else if(Msg == NETMSG_READY)
		{
			if(m_aClients[ClientID].m_State == CClient::STATE_CONNECTING)
			{
				char aAddrStr[NETADDR_MAXSTRSIZE];
				net_addr_str(m_NetServer.ClientAddr(ClientID), aAddrStr, sizeof(aAddrStr), true);

				char aBuf[256];
				str_format(aBuf, sizeof(aBuf), "player is ready. ClientID=%x addr=%s", ClientID, aAddrStr);
				Console()->Print(IConsole::OUTPUT_LEVEL_ADDINFO, "server", aBuf);
				m_aClients[ClientID].m_State = CClient::STATE_READY;
				GameServer()->OnClientConnected(ClientID);
				SendConnectionReady(ClientID);
			}
		}
		else if(Msg == NETMSG_ENTERGAME)
		{
			if(m_aClients[ClientID].m_State == CClient::STATE_READY && GameServer()->IsClientReady(ClientID))
			{
				char aAddrStr[NETADDR_MAXSTRSIZE];
				net_addr_str(m_NetServer.ClientAddr(ClientID), aAddrStr, sizeof(aAddrStr), true);

				char aBuf[256];
				str_format(aBuf, sizeof(aBuf), "player has entered the game. ClientID=%x addr=%s", ClientID, aAddrStr);
				Console()->Print(IConsole::OUTPUT_LEVEL_STANDARD, "server", aBuf);
				m_aClients[ClientID].m_State = CClient::STATE_INGAME;
				GameServer()->OnClientEnter(ClientID);
			}
		}
		else if(Msg == NETMSG_INPUT)
		{
			CClient::CInput *pInput;
			int64 TagTime;

			m_aClients[ClientID].m_LastAckedSnapshot = Unpacker.GetInt();
			int IntendedTick = Unpacker.GetInt();
			int Size = Unpacker.GetInt();

			// check for errors
			if(Unpacker.Error() || Size/4 > MAX_INPUT_SIZE)
				return;

			if(m_aClients[ClientID].m_LastAckedSnapshot > 0)
				m_aClients[ClientID].m_SnapRate = CClient::SNAPRATE_FULL;

			if(m_aClients[ClientID].m_Snapshots.Get(m_aClients[ClientID].m_LastAckedSnapshot, &TagTime, 0, 0) >= 0)
				m_aClients[ClientID].m_Latency = (int)(((time_get()-TagTime)*1000)/time_freq());

			// add message to report the input timing
			// skip packets that are old
			if(IntendedTick > m_aClients[ClientID].m_LastInputTick)
			{
				int TimeLeft = ((TickStartTime(IntendedTick)-time_get())*1000) / time_freq();

				CMsgPacker Msg(NETMSG_INPUTTIMING);
				Msg.AddInt(IntendedTick);
				Msg.AddInt(TimeLeft);
				SendMsgEx(&Msg, 0, ClientID, true);
			}

			m_aClients[ClientID].m_LastInputTick = IntendedTick;

			pInput = &m_aClients[ClientID].m_aInputs[m_aClients[ClientID].m_CurrentInput];

			if(IntendedTick <= Tick())
				IntendedTick = Tick()+1;

			pInput->m_GameTick = IntendedTick;

			for(int i = 0; i < Size/4; i++)
				pInput->m_aData[i] = Unpacker.GetInt();

			mem_copy(m_aClients[ClientID].m_LatestInput.m_aData, pInput->m_aData, MAX_INPUT_SIZE*sizeof(int));

			m_aClients[ClientID].m_CurrentInput++;
			m_aClients[ClientID].m_CurrentInput %= 200;

			// call the mod with the fresh input data
			if(m_aClients[ClientID].m_State == CClient::STATE_INGAME)
				GameServer()->OnClientDirectInput(ClientID, m_aClients[ClientID].m_LatestInput.m_aData);
		}
		else if(Msg == NETMSG_RCON_CMD)
		{
			const char *pCmd = Unpacker.GetString();

			if(Unpacker.Error() == 0 && m_aClients[ClientID].m_Authed)
			{
				char aBuf[256];
				str_format(aBuf, sizeof(aBuf), "ClientID=%d rcon='%s'", ClientID, pCmd);
				Console()->Print(IConsole::OUTPUT_LEVEL_ADDINFO, "server", aBuf);
				m_RconClientID = ClientID;
				m_RconAuthLevel = m_aClients[ClientID].m_Authed;
				Console()->SetAccessLevel(m_aClients[ClientID].m_Authed == AUTHED_ADMIN ? IConsole::ACCESS_LEVEL_ADMIN : IConsole::ACCESS_LEVEL_MOD);
				Console()->ExecuteLineFlag(pCmd, CFGFLAG_SERVER);
				Console()->SetAccessLevel(IConsole::ACCESS_LEVEL_ADMIN);
				m_RconClientID = IServer::RCON_CID_SERV;
				m_RconAuthLevel = AUTHED_ADMIN;
			}
		}
		else if(Msg == NETMSG_RCON_AUTH)
		{
			const char *pPw;
			Unpacker.GetString(); // login name, not used
			pPw = Unpacker.GetString(CUnpacker::SANITIZE_CC);

			if(Unpacker.Error() == 0)
			{
				if(g_Config.m_SvRconPassword[0] == 0 && g_Config.m_SvRconModPassword[0] == 0)
				{
					SendRconLine(ClientID, "No rcon password set on server. Set sv_rcon_password and/or sv_rcon_mod_password to enable the remote console.");
				}
				else if(g_Config.m_SvRconPassword[0] && str_comp(pPw, g_Config.m_SvRconPassword) == 0)
				{
					CMsgPacker Msg(NETMSG_RCON_AUTH_STATUS);
					Msg.AddInt(1);	//authed
					Msg.AddInt(1);	//cmdlist
					SendMsgEx(&Msg, MSGFLAG_VITAL, ClientID, true);

					m_aClients[ClientID].m_Authed = AUTHED_ADMIN;
					int SendRconCmds = Unpacker.GetInt();
					if(Unpacker.Error() == 0 && SendRconCmds)
						m_aClients[ClientID].m_pRconCmdToSend = Console()->FirstCommandInfo(IConsole::ACCESS_LEVEL_ADMIN, CFGFLAG_SERVER);
					SendRconLine(ClientID, "Admin authentication successful. Full remote console access granted.");
					char aBuf[256];
					str_format(aBuf, sizeof(aBuf), "ClientID=%d authed (admin)", ClientID);
					Console()->Print(IConsole::OUTPUT_LEVEL_STANDARD, "server", aBuf);
				}
				else if(g_Config.m_SvRconModPassword[0] && str_comp(pPw, g_Config.m_SvRconModPassword) == 0)
				{
					CMsgPacker Msg(NETMSG_RCON_AUTH_STATUS);
					Msg.AddInt(1);	//authed
					Msg.AddInt(1);	//cmdlist
					SendMsgEx(&Msg, MSGFLAG_VITAL, ClientID, true);

					m_aClients[ClientID].m_Authed = AUTHED_MOD;
					int SendRconCmds = Unpacker.GetInt();
					if(Unpacker.Error() == 0 && SendRconCmds)
						m_aClients[ClientID].m_pRconCmdToSend = Console()->FirstCommandInfo(IConsole::ACCESS_LEVEL_MOD, CFGFLAG_SERVER);
					SendRconLine(ClientID, "Moderator authentication successful. Limited remote console access granted.");
					char aBuf[256];
					str_format(aBuf, sizeof(aBuf), "ClientID=%d authed (moderator)", ClientID);
					Console()->Print(IConsole::OUTPUT_LEVEL_STANDARD, "server", aBuf);
				}
				else if(g_Config.m_SvRconMaxTries)
				{
					m_aClients[ClientID].m_AuthTries++;
					char aBuf[128];
					str_format(aBuf, sizeof(aBuf), "Wrong password %d/%d.", m_aClients[ClientID].m_AuthTries, g_Config.m_SvRconMaxTries);
					SendRconLine(ClientID, aBuf);
					if(m_aClients[ClientID].m_AuthTries >= g_Config.m_SvRconMaxTries)
					{
						if(!g_Config.m_SvRconBantime)
							m_NetServer.Drop(ClientID, "Too many remote console authentication tries");
						else
							m_ServerBan.BanAddr(m_NetServer.ClientAddr(ClientID), g_Config.m_SvRconBantime*60, "Too many remote console authentication tries");
					}
				}
				else
				{
					SendRconLine(ClientID, "Wrong password.");
				}
			}
		}
		else if(Msg == NETMSG_PING)
		{
			CMsgPacker Msg(NETMSG_PING_REPLY);
			SendMsgEx(&Msg, 0, ClientID, true);
		}
		else
		{
			if(g_Config.m_Debug)
			{
				char aHex[] = "0123456789ABCDEF";
				char aBuf[512];

				for(int b = 0; b < pPacket->m_DataSize && b < 32; b++)
				{
					aBuf[b*3] = aHex[((const unsigned char *)pPacket->m_pData)[b]>>4];
					aBuf[b*3+1] = aHex[((const unsigned char *)pPacket->m_pData)[b]&0xf];
					aBuf[b*3+2] = ' ';
					aBuf[b*3+3] = 0;
				}

				char aBufMsg[256];
				str_format(aBufMsg, sizeof(aBufMsg), "strange message ClientID=%d msg=%d data_size=%d", ClientID, Msg, pPacket->m_DataSize);
				Console()->Print(IConsole::OUTPUT_LEVEL_DEBUG, "server", aBufMsg);
				Console()->Print(IConsole::OUTPUT_LEVEL_DEBUG, "server", aBuf);
			}
		}
	}
Example #2
0
void CServer::ProcessClientPacket(CNetChunk *pPacket)
{
	int ClientId = pPacket->m_ClientID;
	NETADDR Addr;
	CUnpacker Unpacker;
	Unpacker.Reset(pPacket->m_pData, pPacket->m_DataSize);
	
	// unpack msgid and system flag
	int Msg = Unpacker.GetInt();
	int Sys = Msg&1;
	Msg >>= 1;
	
	if(Unpacker.Error())
		return;
	
	if(m_aClients[ClientId].m_State == CClient::STATE_AUTH)
	{
		if(Sys && Msg == NETMSG_INFO)
		{
			char aVersion[64];
			const char *pPassword;
			str_copy(aVersion, Unpacker.GetString(), 64);
			if(str_comp(aVersion, GameServer()->NetVersion()) != 0)
			{
				// OH F**K! wrong version, drop him
				char aReason[256];
				str_format(aReason, sizeof(aReason), "wrong version. server is running '%s' and client '%s'.", GameServer()->NetVersion(), aVersion);
				m_NetServer.Drop(ClientId, aReason);
				return;
			}
			
			str_copy(m_aClients[ClientId].m_aName, Unpacker.GetString(), MAX_NAME_LENGTH);
			str_copy(m_aClients[ClientId].m_aClan, Unpacker.GetString(), MAX_CLANNAME_LENGTH);
			pPassword = Unpacker.GetString();
			
			if(g_Config.m_Password[0] != 0 && str_comp(g_Config.m_Password, pPassword) != 0)
			{
				// wrong password
				m_NetServer.Drop(ClientId, "wrong password");
				return;
			}
			
			m_aClients[ClientId].m_State = CClient::STATE_CONNECTING;
			SendMap(ClientId);
		}
	}
	else
	{
		if(Sys)
		{
			// system message
			if(Msg == NETMSG_REQUEST_MAP_DATA)
			{
				int Chunk = Unpacker.GetInt();
				int ChunkSize = 1024-128;
				int Offset = Chunk * ChunkSize;
				int Last = 0;
				
				// drop faulty map data requests
				if(Chunk < 0 || Offset > m_CurrentMapSize)
					return;
				
				if(Offset+ChunkSize >= m_CurrentMapSize)
				{
					ChunkSize = m_CurrentMapSize-Offset;
					if(ChunkSize < 0)
						ChunkSize = 0;
					Last = 1;
				}
				
				CMsgPacker Msg(NETMSG_MAP_DATA);
				Msg.AddInt(Last);
				Msg.AddInt(m_CurrentMapSize);
				Msg.AddInt(ChunkSize);
				Msg.AddRaw(&m_pCurrentMapData[Offset], ChunkSize);
				SendMsgEx(&Msg, MSGFLAG_VITAL|MSGFLAG_FLUSH, ClientId, true);
				
				if(g_Config.m_Debug)
					dbg_msg("server", "sending chunk %d with size %d", Chunk, ChunkSize);
			}
			else if(Msg == NETMSG_READY)
			{
				if(m_aClients[ClientId].m_State == CClient::STATE_CONNECTING)
				{
					Addr = m_NetServer.ClientAddr(ClientId);
					
					dbg_msg("server", "player is ready. ClientId=%x ip=%d.%d.%d.%d",
						ClientId, Addr.ip[0], Addr.ip[1], Addr.ip[2], Addr.ip[3]);
					m_aClients[ClientId].m_State = CClient::STATE_READY;
					GameServer()->OnClientConnected(ClientId);
				}
			}
			else if(Msg == NETMSG_ENTERGAME)
			{
				if(m_aClients[ClientId].m_State == CClient::STATE_READY)
				{
					Addr = m_NetServer.ClientAddr(ClientId);
					
					dbg_msg("server", "player has entered the game. ClientId=%x ip=%d.%d.%d.%d",
						ClientId, Addr.ip[0], Addr.ip[1], Addr.ip[2], Addr.ip[3]);
					m_aClients[ClientId].m_State = CClient::STATE_INGAME;
					GameServer()->OnClientEnter(ClientId);
				}
			}
			else if(Msg == NETMSG_INPUT)
			{
				CClient::CInput *pInput;
				int64 TagTime;
				
				m_aClients[ClientId].m_LastAckedSnapshot = Unpacker.GetInt();
				int IntendedTick = Unpacker.GetInt();
				int Size = Unpacker.GetInt();
				
				// check for errors
				if(Unpacker.Error() || Size/4 > MAX_INPUT_SIZE)
					return;

				if(m_aClients[ClientId].m_LastAckedSnapshot > 0)
					m_aClients[ClientId].m_SnapRate = CClient::SNAPRATE_FULL;
					
				if(m_aClients[ClientId].m_Snapshots.Get(m_aClients[ClientId].m_LastAckedSnapshot, &TagTime, 0, 0) >= 0)
					m_aClients[ClientId].m_Latency = (int)(((time_get()-TagTime)*1000)/time_freq());

				// add message to report the input timing
				// skip packets that are old
				if(IntendedTick > m_aClients[ClientId].m_LastInputTick)
				{
					int TimeLeft = ((TickStartTime(IntendedTick)-time_get())*1000) / time_freq();
					
					CMsgPacker Msg(NETMSG_INPUTTIMING);
					Msg.AddInt(IntendedTick);
					Msg.AddInt(TimeLeft);
					SendMsgEx(&Msg, 0, ClientId, true);
				}

				m_aClients[ClientId].m_LastInputTick = IntendedTick;

				pInput = &m_aClients[ClientId].m_aInputs[m_aClients[ClientId].m_CurrentInput];
				
				if(IntendedTick <= Tick())
					IntendedTick = Tick()+1;

				pInput->m_GameTick = IntendedTick;
				
				for(int i = 0; i < Size/4; i++)
					pInput->m_aData[i] = Unpacker.GetInt();
				
				mem_copy(m_aClients[ClientId].m_LatestInput.m_aData, pInput->m_aData, MAX_INPUT_SIZE*sizeof(int));
				
				m_aClients[ClientId].m_CurrentInput++;
				m_aClients[ClientId].m_CurrentInput %= 200;
			
				// call the mod with the fresh input data
				if(m_aClients[ClientId].m_State == CClient::STATE_INGAME)
					GameServer()->OnClientDirectInput(ClientId, m_aClients[ClientId].m_LatestInput.m_aData);
			}
			else if(Msg == NETMSG_RCON_CMD)
			{
				const char *pCmd = Unpacker.GetString();
				
				if(Unpacker.Error() == 0 && m_aClients[ClientId].m_Authed)
				{
					dbg_msg("server", "ClientId=%d rcon='%s'", ClientId, pCmd);
					Console()->ExecuteLine(pCmd);
				}
			}
			else if(Msg == NETMSG_RCON_AUTH)
			{
				const char *pPw;
				Unpacker.GetString(); // login name, not used
				pPw = Unpacker.GetString();
				
				if(Unpacker.Error() == 0)
				{
					if(g_Config.m_SvRconPassword[0] == 0)
					{
						SendRconLine(ClientId, "No rcon password set on server. Set sv_rcon_password to enable the remote console.");
					}
					else if(str_comp(pPw, g_Config.m_SvRconPassword) == 0)
					{
						CMsgPacker Msg(NETMSG_RCON_AUTH_STATUS);
						Msg.AddInt(1);
						SendMsgEx(&Msg, MSGFLAG_VITAL, ClientId, true);
						
						m_aClients[ClientId].m_Authed = 1;
						SendRconLine(ClientId, "Authentication successful. Remote console access granted.");
						dbg_msg("server", "ClientId=%d authed", ClientId);
					}
					else
					{
						SendRconLine(ClientId, "Wrong password.");
					}
				}
			}
			else if(Msg == NETMSG_PING)
			{
				CMsgPacker Msg(NETMSG_PING_REPLY);
				SendMsgEx(&Msg, 0, ClientId, true);
			}
			else
			{
				char aHex[] = "0123456789ABCDEF";
				char aBuf[512];

				for(int b = 0; b < pPacket->m_DataSize && b < 32; b++)
				{
					aBuf[b*3] = aHex[((const unsigned char *)pPacket->m_pData)[b]>>4];
					aBuf[b*3+1] = aHex[((const unsigned char *)pPacket->m_pData)[b]&0xf];
					aBuf[b*3+2] = ' ';
					aBuf[b*3+3] = 0;
				}

				dbg_msg("server", "strange message ClientId=%d msg=%d data_size=%d", ClientId, Msg, pPacket->m_DataSize);
				dbg_msg("server", "%s", aBuf);
				
			}
		}
		else
		{
			// game message
			if(m_aClients[ClientId].m_State >= CClient::STATE_READY)
				GameServer()->OnMessage(Msg, &Unpacker, ClientId);
		}
	}