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113fefeeb7
The 'controller' of an MP game (the host in general, though dedicated
servers would change that) is currently whoever first tells the server
that it is. This can be abused since it relies on trusting the clients.
This changes that logic: the server defines a 'controller secret', and
the first client to sent the correct controller secret is the
controller. This is safe assuming the secret is unknowable enough (the
current solution wouldn't pass strict cryptography tests, but it's
likely good enough).
Reverts 1a3fb29ff3, which introduced the 'trust the clients' mechanic,
as a change over 'the first local IP is controller'.
Necessary step towards dedicated server, if we want to use the regular
gamesetup (Refs #3556)
Differential Revision: https://code.wildfiregames.com/D3075
This was SVN commit r24952.
254 lines
6.6 KiB
C
254 lines
6.6 KiB
C
/* Copyright (C) 2020 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file
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* The list of messages used by the network subsystem.
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*/
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#ifndef NETMESSAGES_H
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#define NETMESSAGES_H
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#include "ps/CStr.h"
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#include "scriptinterface/ScriptTypes.h"
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#define PS_PROTOCOL_MAGIC 0x5073013f // 'P', 's', 0x01, '?'
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#define PS_PROTOCOL_MAGIC_RESPONSE 0x50630121 // 'P', 'c', 0x01, '!'
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#define PS_PROTOCOL_VERSION 0x01010017 // Arbitrary protocol
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#define PS_DEFAULT_PORT 0x5073 // 'P', 's'
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// Set when lobby authentication is required. Used in the SrvHandshakeResponseMessage.
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#define PS_NETWORK_FLAG_REQUIRE_LOBBYAUTH 0x1
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// Defines the list of message types. The order of the list must not change.
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// The message types having a negative value are used internally and not sent
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// over the network. The message types used for network communication have
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// positive values.
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enum NetMessageType
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{
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NMT_CONNECT_COMPLETE = -256,
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NMT_CONNECTION_LOST,
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NMT_INVALID = 0,
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NMT_SERVER_HANDSHAKE,
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NMT_CLIENT_HANDSHAKE,
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NMT_SERVER_HANDSHAKE_RESPONSE,
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NMT_AUTHENTICATE,
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NMT_AUTHENTICATE_RESULT,
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NMT_CHAT,
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NMT_READY,
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NMT_CLEAR_ALL_READY,
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NMT_GAME_SETUP,
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NMT_ASSIGN_PLAYER,
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NMT_PLAYER_ASSIGNMENT,
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NMT_FILE_TRANSFER_REQUEST,
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NMT_FILE_TRANSFER_RESPONSE,
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NMT_FILE_TRANSFER_DATA,
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NMT_FILE_TRANSFER_ACK,
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NMT_JOIN_SYNC_START,
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NMT_REJOINED,
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NMT_KICKED,
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NMT_CLIENT_TIMEOUT,
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NMT_CLIENT_PERFORMANCE,
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NMT_CLIENTS_LOADING,
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NMT_CLIENT_PAUSED,
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NMT_LOADED_GAME,
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NMT_GAME_START,
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NMT_END_COMMAND_BATCH,
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NMT_SYNC_CHECK, // OOS-detection hash checking
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NMT_SYNC_ERROR, // OOS-detection error
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NMT_SIMULATION_COMMAND
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};
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// Authentication result codes
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enum AuthenticateResultCode
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{
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ARC_OK,
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ARC_OK_REJOINING,
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ARC_PASSWORD_INVALID,
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};
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#endif // NETMESSAGES_H
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#ifdef CREATING_NMT
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#define ALLNETMSGS_DONT_CREATE_NMTS
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#define START_NMT_CLASS_(_nm, _message) START_NMT_CLASS(C##_nm##Message, _message)
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#define DERIVE_NMT_CLASS_(_base, _nm, _message) START_NMT_CLASS_DERIVED(C ## _base ## Message, C ## _nm ## Message, _message)
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START_NMTS()
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START_NMT_CLASS_(SrvHandshake, NMT_SERVER_HANDSHAKE)
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NMT_FIELD_INT(m_Magic, u32, 4)
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NMT_FIELD_INT(m_ProtocolVersion, u32, 4)
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NMT_FIELD_INT(m_SoftwareVersion, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(CliHandshake, NMT_CLIENT_HANDSHAKE)
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NMT_FIELD_INT(m_MagicResponse, u32, 4)
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NMT_FIELD_INT(m_ProtocolVersion, u32, 4)
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NMT_FIELD_INT(m_SoftwareVersion, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(SrvHandshakeResponse, NMT_SERVER_HANDSHAKE_RESPONSE)
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NMT_FIELD_INT(m_UseProtocolVersion, u32, 4)
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NMT_FIELD_INT(m_Flags, u32, 4)
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NMT_FIELD(CStr, m_GUID)
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END_NMT_CLASS()
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START_NMT_CLASS_(Authenticate, NMT_AUTHENTICATE)
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NMT_FIELD(CStrW, m_Name)
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NMT_FIELD_SECRET(CStr, m_Password)
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NMT_FIELD_SECRET(CStr, m_ControllerSecret)
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END_NMT_CLASS()
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START_NMT_CLASS_(AuthenticateResult, NMT_AUTHENTICATE_RESULT)
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NMT_FIELD_INT(m_Code, u32, 4)
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NMT_FIELD_INT(m_HostID, u32, 2)
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NMT_FIELD_INT(m_IsController, u8, 1)
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NMT_FIELD(CStrW, m_Message)
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END_NMT_CLASS()
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START_NMT_CLASS_(Chat, NMT_CHAT)
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NMT_FIELD(CStr, m_GUID) // ignored when client->server, valid when server->client
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NMT_FIELD(CStrW, m_Message)
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END_NMT_CLASS()
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START_NMT_CLASS_(Ready, NMT_READY)
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NMT_FIELD(CStr, m_GUID)
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NMT_FIELD_INT(m_Status, u8, 1)
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END_NMT_CLASS()
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START_NMT_CLASS_(ClearAllReady, NMT_CLEAR_ALL_READY)
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END_NMT_CLASS()
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START_NMT_CLASS_(PlayerAssignment, NMT_PLAYER_ASSIGNMENT)
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NMT_START_ARRAY(m_Hosts)
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NMT_FIELD(CStr, m_GUID)
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NMT_FIELD(CStrW, m_Name)
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NMT_FIELD_INT(m_PlayerID, i8, 1)
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NMT_FIELD_INT(m_Status, u8, 1)
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NMT_END_ARRAY()
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END_NMT_CLASS()
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START_NMT_CLASS_(FileTransferRequest, NMT_FILE_TRANSFER_REQUEST)
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NMT_FIELD_INT(m_RequestID, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(FileTransferResponse, NMT_FILE_TRANSFER_RESPONSE)
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NMT_FIELD_INT(m_RequestID, u32, 4)
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NMT_FIELD_INT(m_Length, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(FileTransferData, NMT_FILE_TRANSFER_DATA)
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NMT_FIELD_INT(m_RequestID, u32, 4)
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NMT_FIELD(CStr, m_Data)
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END_NMT_CLASS()
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START_NMT_CLASS_(FileTransferAck, NMT_FILE_TRANSFER_ACK)
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NMT_FIELD_INT(m_RequestID, u32, 4)
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NMT_FIELD_INT(m_NumPackets, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(JoinSyncStart, NMT_JOIN_SYNC_START)
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END_NMT_CLASS()
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START_NMT_CLASS_(Rejoined, NMT_REJOINED)
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NMT_FIELD(CStr, m_GUID)
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END_NMT_CLASS()
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START_NMT_CLASS_(Kicked, NMT_KICKED)
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NMT_FIELD(CStrW, m_Name)
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NMT_FIELD_INT(m_Ban, u8, 1)
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END_NMT_CLASS()
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START_NMT_CLASS_(ClientTimeout, NMT_CLIENT_TIMEOUT)
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NMT_FIELD(CStr, m_GUID)
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NMT_FIELD_INT(m_LastReceivedTime, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(ClientPerformance, NMT_CLIENT_PERFORMANCE)
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NMT_START_ARRAY(m_Clients)
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NMT_FIELD(CStr, m_GUID)
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NMT_FIELD_INT(m_MeanRTT, u32, 4)
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NMT_END_ARRAY()
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END_NMT_CLASS()
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START_NMT_CLASS_(ClientsLoading, NMT_CLIENTS_LOADING)
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NMT_START_ARRAY(m_Clients)
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NMT_FIELD(CStr, m_GUID)
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NMT_END_ARRAY()
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END_NMT_CLASS()
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START_NMT_CLASS_(ClientPaused, NMT_CLIENT_PAUSED)
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NMT_FIELD(CStr, m_GUID)
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NMT_FIELD_INT(m_Pause, u8, 1)
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END_NMT_CLASS()
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START_NMT_CLASS_(LoadedGame, NMT_LOADED_GAME)
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NMT_FIELD_INT(m_CurrentTurn, u32, 4)
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END_NMT_CLASS()
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START_NMT_CLASS_(GameStart, NMT_GAME_START)
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END_NMT_CLASS()
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START_NMT_CLASS_(EndCommandBatch, NMT_END_COMMAND_BATCH)
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NMT_FIELD_INT(m_Turn, u32, 4)
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NMT_FIELD_INT(m_TurnLength, u32, 2)
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END_NMT_CLASS()
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START_NMT_CLASS_(SyncCheck, NMT_SYNC_CHECK)
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NMT_FIELD_INT(m_Turn, u32, 4)
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NMT_FIELD(CStr, m_Hash)
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END_NMT_CLASS()
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START_NMT_CLASS_(SyncError, NMT_SYNC_ERROR)
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NMT_FIELD_INT(m_Turn, u32, 4)
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NMT_FIELD(CStr, m_HashExpected)
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NMT_START_ARRAY(m_PlayerNames)
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NMT_FIELD(CStrW, m_Name)
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NMT_END_ARRAY()
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END_NMT_CLASS()
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START_NMT_CLASS_(AssignPlayer, NMT_ASSIGN_PLAYER)
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NMT_FIELD_INT(m_PlayerID, i8, 1)
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NMT_FIELD(CStr, m_GUID)
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END_NMT_CLASS()
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END_NMTS()
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#else
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#ifndef ALLNETMSGS_DONT_CREATE_NMTS
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# ifdef ALLNETMSGS_IMPLEMENT
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# define NMT_CREATOR_IMPLEMENT
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# endif
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# define NMT_CREATE_HEADER_NAME "NetMessages.h"
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# include "NMTCreator.h"
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#endif // #ifndef ALLNETMSGS_DONT_CREATE_NMTS
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#endif // #ifdef CREATING_NMT
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