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tcp_game.cpp
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1 /* $Id: tcp_game.cpp 26482 2014-04-23 20:13:33Z rubidium $ */
2
3 /*
4 * This file is part of OpenTTD.
5 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
6 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
7 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
8 */
9
14 #ifdef ENABLE_NETWORK
15
16 #include "../../stdafx.h"
17
18 #include "../network.h"
19 #include "../network_internal.h"
20 #include "../../debug.h"
21 #include "../../error.h"
22
23 #include "table/strings.h"
24
25 #include "../../safeguards.h"
26
31 NetworkGameSocketHandler::NetworkGameSocketHandler(SOCKET s) : info(NULL), client_id(INVALID_CLIENT_ID),
32 last_frame(_frame_counter), last_frame_server(_frame_counter), last_packet(_realtime_tick)
33 {
34 this->sock = s;
35 }
36
44 NetworkRecvStatus NetworkGameSocketHandler::CloseConnection(bool error)
45 {
46 /* Clients drop back to the main menu */
47 if (!_network_server && _networking) {
48 _switch_mode = SM_MENU;
49 _networking = false;
50 ShowErrorMessage(STR_NETWORK_ERROR_LOSTCONNECTION, INVALID_STRING_ID, WL_CRITICAL);
51
52 return NETWORK_RECV_STATUS_CONN_LOST;
53 }
54
55 return this->CloseConnection(error ? NETWORK_RECV_STATUS_SERVER_ERROR : NETWORK_RECV_STATUS_CONN_LOST);
56 }
57
58
64 NetworkRecvStatus NetworkGameSocketHandler::HandlePacket(Packet *p)
65 {
66 PacketGameType type = (PacketGameType)p->Recv_uint8();
67
68 this->last_packet = _realtime_tick;
69
70 switch (this->HasClientQuit() ? PACKET_END : type) {
71 case PACKET_SERVER_FULL: return this->Receive_SERVER_FULL(p);
72 case PACKET_SERVER_BANNED: return this->Receive_SERVER_BANNED(p);
73 case PACKET_CLIENT_JOIN: return this->Receive_CLIENT_JOIN(p);
74 case PACKET_SERVER_ERROR: return this->Receive_SERVER_ERROR(p);
75 case PACKET_CLIENT_COMPANY_INFO: return this->Receive_CLIENT_COMPANY_INFO(p);
76 case PACKET_SERVER_COMPANY_INFO: return this->Receive_SERVER_COMPANY_INFO(p);
77 case PACKET_SERVER_CLIENT_INFO: return this->Receive_SERVER_CLIENT_INFO(p);
78 case PACKET_SERVER_NEED_GAME_PASSWORD: return this->Receive_SERVER_NEED_GAME_PASSWORD(p);
79 case PACKET_SERVER_NEED_COMPANY_PASSWORD: return this->Receive_SERVER_NEED_COMPANY_PASSWORD(p);
80 case PACKET_CLIENT_GAME_PASSWORD: return this->Receive_CLIENT_GAME_PASSWORD(p);
81 case PACKET_CLIENT_COMPANY_PASSWORD: return this->Receive_CLIENT_COMPANY_PASSWORD(p);
82 case PACKET_SERVER_WELCOME: return this->Receive_SERVER_WELCOME(p);
83 case PACKET_CLIENT_GETMAP: return this->Receive_CLIENT_GETMAP(p);
84 case PACKET_SERVER_WAIT: return this->Receive_SERVER_WAIT(p);
85 case PACKET_SERVER_MAP_BEGIN: return this->Receive_SERVER_MAP_BEGIN(p);
86 case PACKET_SERVER_MAP_SIZE: return this->Receive_SERVER_MAP_SIZE(p);
87 case PACKET_SERVER_MAP_DATA: return this->Receive_SERVER_MAP_DATA(p);
88 case PACKET_SERVER_MAP_DONE: return this->Receive_SERVER_MAP_DONE(p);
89 case PACKET_CLIENT_MAP_OK: return this->Receive_CLIENT_MAP_OK(p);
90 case PACKET_SERVER_JOIN: return this->Receive_SERVER_JOIN(p);
91 case PACKET_SERVER_FRAME: return this->Receive_SERVER_FRAME(p);
92 case PACKET_SERVER_SYNC: return this->Receive_SERVER_SYNC(p);
93 case PACKET_CLIENT_ACK: return this->Receive_CLIENT_ACK(p);
94 case PACKET_CLIENT_COMMAND: return this->Receive_CLIENT_COMMAND(p);
95 case PACKET_SERVER_COMMAND: return this->Receive_SERVER_COMMAND(p);
96 case PACKET_CLIENT_CHAT: return this->Receive_CLIENT_CHAT(p);
97 case PACKET_SERVER_CHAT: return this->Receive_SERVER_CHAT(p);
98 case PACKET_CLIENT_SET_PASSWORD: return this->Receive_CLIENT_SET_PASSWORD(p);
99 case PACKET_CLIENT_SET_NAME: return this->Receive_CLIENT_SET_NAME(p);
100 case PACKET_CLIENT_QUIT: return this->Receive_CLIENT_QUIT(p);
101 case PACKET_CLIENT_ERROR: return this->Receive_CLIENT_ERROR(p);
102 case PACKET_SERVER_QUIT: return this->Receive_SERVER_QUIT(p);
103 case PACKET_SERVER_ERROR_QUIT: return this->Receive_SERVER_ERROR_QUIT(p);
104 case PACKET_SERVER_SHUTDOWN: return this->Receive_SERVER_SHUTDOWN(p);
105 case PACKET_SERVER_NEWGAME: return this->Receive_SERVER_NEWGAME(p);
106 case PACKET_SERVER_RCON: return this->Receive_SERVER_RCON(p);
107 case PACKET_CLIENT_RCON: return this->Receive_CLIENT_RCON(p);
108 case PACKET_SERVER_CHECK_NEWGRFS: return this->Receive_SERVER_CHECK_NEWGRFS(p);
109 case PACKET_CLIENT_NEWGRFS_CHECKED: return this->Receive_CLIENT_NEWGRFS_CHECKED(p);
110 case PACKET_SERVER_MOVE: return this->Receive_SERVER_MOVE(p);
111 case PACKET_CLIENT_MOVE: return this->Receive_CLIENT_MOVE(p);
112 case PACKET_SERVER_COMPANY_UPDATE: return this->Receive_SERVER_COMPANY_UPDATE(p);
113 case PACKET_SERVER_CONFIG_UPDATE: return this->Receive_SERVER_CONFIG_UPDATE(p);
114
115 default:
116 this->CloseConnection();
117
118 if (this->HasClientQuit()) {
119 DEBUG(net, 0, "[tcp/game] received invalid packet type %d from client %d", type, this->client_id);
120 } else {
121 DEBUG(net, 0, "[tcp/game] received illegal packet from client %d", this->client_id);
122 }
123 return NETWORK_RECV_STATUS_MALFORMED_PACKET;
124 }
125 }
126
134 NetworkRecvStatus NetworkGameSocketHandler::ReceivePackets()
135 {
136 Packet *p;
137 while ((p = this->ReceivePacket()) != NULL) {
138 NetworkRecvStatus res = HandlePacket(p);
139 delete p;
140 if (res != NETWORK_RECV_STATUS_OKAY) return res;
141 }
142
143 return NETWORK_RECV_STATUS_OKAY;
144 }
145
151 NetworkRecvStatus NetworkGameSocketHandler::ReceiveInvalidPacket(PacketGameType type)
152 {
153 DEBUG(net, 0, "[tcp/game] received illegal packet type %d from client %d", type, this->client_id);
154 return NETWORK_RECV_STATUS_MALFORMED_PACKET;
155 }
156
157 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FULL(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_FULL); }
158 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_BANNED); }
159 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_JOIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_JOIN); }
160 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR); }
161 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMPANY_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMPANY_INFO); }
162 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMPANY_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMPANY_INFO); }
163 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CLIENT_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CLIENT_INFO); }
164 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEED_GAME_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEED_GAME_PASSWORD); }
165 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEED_COMPANY_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEED_COMPANY_PASSWORD); }
166 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GAME_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GAME_PASSWORD); }
167 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMPANY_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMPANY_PASSWORD); }
168 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_WELCOME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_WELCOME); }
169 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GETMAP(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GETMAP); }
170 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_WAIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_WAIT); }
171 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_BEGIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_BEGIN); }
172 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_SIZE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_SIZE); }
173 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_DATA(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_DATA); }
174 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MAP_DONE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MAP_DONE); }
175 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_MAP_OK(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_MAP_OK); }
176 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_JOIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_JOIN); }
177 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FRAME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_FRAME); }
178 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_SYNC(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_SYNC); }
179 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_ACK(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_ACK); }
180 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMMAND(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMMAND); }
181 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMMAND(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMMAND); }
182 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_CHAT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_CHAT); }
183 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CHAT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CHAT); }
184 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_SET_PASSWORD(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_SET_PASSWORD); }
185 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_SET_NAME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_SET_NAME); }
186 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_QUIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_QUIT); }
187 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_ERROR); }
188 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_QUIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_QUIT); }
189 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR_QUIT(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR_QUIT); }
190 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_SHUTDOWN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_SHUTDOWN); }
191 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_NEWGAME(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_NEWGAME); }
192 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_RCON(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_RCON); }
193 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_RCON(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_RCON); }
194 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CHECK_NEWGRFS(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CHECK_NEWGRFS); }
195 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_NEWGRFS_CHECKED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_NEWGRFS_CHECKED); }
196 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_MOVE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_MOVE); }
197 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_MOVE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_MOVE); }
198 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMPANY_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMPANY_UPDATE); }
199 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CONFIG_UPDATE(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CONFIG_UPDATE); }
200
201 #endif /* ENABLE_NETWORK */