OpenTTD Source: src/network/core/udp.cpp Source File

OpenTTD Source 1.11.0-RC1

udp.cpp
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1 /*
2 * This file is part of OpenTTD.
3 * 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.
4 * 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.
5 * 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/>.
6 */
7
12 #include "../../stdafx.h"
13 #include "../../date_func.h"
14 #include "../../debug.h"
15 #include "udp.h"
16
17 #include "../../safeguards.h"
18
23 NetworkUDPSocketHandler::NetworkUDPSocketHandler(NetworkAddressList *bind)
24 {
25 if (bind != nullptr) {
26 for (NetworkAddress &addr : *bind) {
27 this->bind.push_back(addr);
28 }
29 } else {
30 /* As hostname nullptr and port 0/nullptr don't go well when
31 * resolving it we need to add an address for each of
32 * the address families we support. */
33 this->bind.emplace_back(nullptr, 0, AF_INET);
34 this->bind.emplace_back(nullptr, 0, AF_INET6);
35 }
36 }
37
38
43 bool NetworkUDPSocketHandler::Listen()
44 {
45 /* Make sure socket is closed */
46 this->Close();
47
48 for (NetworkAddress &addr : this->bind) {
49 addr.Listen(SOCK_DGRAM, &this->sockets);
50 }
51
52 return this->sockets.size() != 0;
53 }
54
58 void NetworkUDPSocketHandler::Close()
59 {
60 for (auto &s : this->sockets) {
61 closesocket(s.second);
62 }
63 this->sockets.clear();
64 }
65
66 NetworkRecvStatus NetworkUDPSocketHandler::CloseConnection(bool error)
67 {
68 NetworkSocketHandler::CloseConnection(error);
69 return NETWORK_RECV_STATUS_OKAY;
70 }
71
79 void NetworkUDPSocketHandler::SendPacket(Packet *p, NetworkAddress *recv, bool all, bool broadcast)
80 {
81 if (this->sockets.size() == 0) this->Listen();
82
83 for (auto &s : this->sockets) {
84 /* Make a local copy because if we resolve it we cannot
85 * easily unresolve it so we can resolve it later again. */
86 NetworkAddress send(*recv);
87
88 /* Not the same type */
89 if (!send.IsFamily(s.first.GetAddress()->ss_family)) continue;
90
91 p->PrepareToSend();
92
93 if (broadcast) {
94 /* Enable broadcast */
95 unsigned long val = 1;
96 if (setsockopt(s.second, SOL_SOCKET, SO_BROADCAST, (char *) &val, sizeof(val)) < 0) {
97 DEBUG(net, 1, "[udp] setting broadcast failed with: %i", GET_LAST_ERROR());
98 }
99 }
100
101 /* Send the buffer */
102 int res = sendto(s.second, (const char*)p->buffer, p->size, 0, (const struct sockaddr *)send.GetAddress(), send.GetAddressLength());
103 DEBUG(net, 7, "[udp] sendto(%s)", send.GetAddressAsString().c_str());
104
105 /* Check for any errors, but ignore it otherwise */
106 if (res == -1) DEBUG(net, 1, "[udp] sendto(%s) failed with: %i", send.GetAddressAsString().c_str(), GET_LAST_ERROR());
107
108 if (!all) break;
109 }
110 }
111
115 void NetworkUDPSocketHandler::ReceivePackets()
116 {
117 for (auto &s : this->sockets) {
118 for (int i = 0; i < 1000; i++) { // Do not infinitely loop when DoSing with UDP
119 struct sockaddr_storage client_addr;
120 memset(&client_addr, 0, sizeof(client_addr));
121
122 Packet p(this);
123 socklen_t client_len = sizeof(client_addr);
124
125 /* Try to receive anything */
126 SetNonBlocking(s.second); // Some OSes seem to lose the non-blocking status of the socket
127 int nbytes = recvfrom(s.second, (char*)p.buffer, SEND_MTU, 0, (struct sockaddr *)&client_addr, &client_len);
128
129 /* Did we get the bytes for the base header of the packet? */
130 if (nbytes <= 0) break; // No data, i.e. no packet
131 if (nbytes <= 2) continue; // Invalid data; try next packet
132 #ifdef __EMSCRIPTEN__
133 client_len = FixAddrLenForEmscripten(client_addr);
134 #endif
135
136 NetworkAddress address(client_addr, client_len);
137 p.PrepareToRead();
138
139 /* If the size does not match the packet must be corrupted.
140 * Otherwise it will be marked as corrupted later on. */
141 if (nbytes != p.size) {
142 DEBUG(net, 1, "received a packet with mismatching size from %s", address.GetAddressAsString().c_str());
143 continue;
144 }
145
146 /* Handle the packet */
147 this->HandleUDPPacket(&p, &address);
148 }
149 }
150 }
151
152
158 void NetworkUDPSocketHandler::SendNetworkGameInfo(Packet *p, const NetworkGameInfo *info)
159 {
160 p->Send_uint8 (NETWORK_GAME_INFO_VERSION);
161
162 /*
163 * Please observe the order.
164 * The parts must be read in the same order as they are sent!
165 */
166
167 /* Update the documentation in udp.h on changes
168 * to the NetworkGameInfo wire-protocol! */
169
170 /* NETWORK_GAME_INFO_VERSION = 4 */
171 {
172 /* Only send the GRF Identification (GRF_ID and MD5 checksum) of
173 * the GRFs that are needed, i.e. the ones that the server has
174 * selected in the NewGRF GUI and not the ones that are used due
175 * to the fact that they are in [newgrf-static] in openttd.cfg */
176 const GRFConfig *c;
177 uint count = 0;
178
179 /* Count number of GRFs to send information about */
180 for (c = info->grfconfig; c != nullptr; c = c->next) {
181 if (!HasBit(c->flags, GCF_STATIC)) count++;
182 }
183 p->Send_uint8 (count); // Send number of GRFs
184
185 /* Send actual GRF Identifications */
186 for (c = info->grfconfig; c != nullptr; c = c->next) {
187 if (!HasBit(c->flags, GCF_STATIC)) this->SendGRFIdentifier(p, &c->ident);
188 }
189 }
190
191 /* NETWORK_GAME_INFO_VERSION = 3 */
192 p->Send_uint32(info->game_date);
193 p->Send_uint32(info->start_date);
194
195 /* NETWORK_GAME_INFO_VERSION = 2 */
196 p->Send_uint8 (info->companies_max);
197 p->Send_uint8 (info->companies_on);
198 p->Send_uint8 (info->spectators_max);
199
200 /* NETWORK_GAME_INFO_VERSION = 1 */
201 p->Send_string(info->server_name);
202 p->Send_string(info->server_revision);
203 p->Send_uint8 (info->server_lang);
204 p->Send_bool (info->use_password);
205 p->Send_uint8 (info->clients_max);
206 p->Send_uint8 (info->clients_on);
207 p->Send_uint8 (info->spectators_on);
208 p->Send_string(info->map_name);
209 p->Send_uint16(info->map_width);
210 p->Send_uint16(info->map_height);
211 p->Send_uint8 (info->map_set);
212 p->Send_bool (info->dedicated);
213 }
214
220 void NetworkUDPSocketHandler::ReceiveNetworkGameInfo(Packet *p, NetworkGameInfo *info)
221 {
222 static const Date MAX_DATE = ConvertYMDToDate(MAX_YEAR, 11, 31); // December is month 11
223
224 info->game_info_version = p->Recv_uint8();
225
226 /*
227 * Please observe the order.
228 * The parts must be read in the same order as they are sent!
229 */
230
231 /* Update the documentation in udp.h on changes
232 * to the NetworkGameInfo wire-protocol! */
233
234 switch (info->game_info_version) {
235 case 4: {
236 GRFConfig **dst = &info->grfconfig;
237 uint i;
238 uint num_grfs = p->Recv_uint8();
239
240 /* Broken/bad data. It cannot have that many NewGRFs. */
241 if (num_grfs > NETWORK_MAX_GRF_COUNT) return;
242
243 for (i = 0; i < num_grfs; i++) {
244 GRFConfig *c = new GRFConfig();
245 this->ReceiveGRFIdentifier(p, &c->ident);
246 this->HandleIncomingNetworkGameInfoGRFConfig(c);
247
248 /* Append GRFConfig to the list */
249 *dst = c;
250 dst = &c->next;
251 }
252 FALLTHROUGH;
253 }
254
255 case 3:
256 info->game_date = Clamp(p->Recv_uint32(), 0, MAX_DATE);
257 info->start_date = Clamp(p->Recv_uint32(), 0, MAX_DATE);
258 FALLTHROUGH;
259
260 case 2:
261 info->companies_max = p->Recv_uint8 ();
262 info->companies_on = p->Recv_uint8 ();
263 info->spectators_max = p->Recv_uint8 ();
264 FALLTHROUGH;
265
266 case 1:
267 p->Recv_string(info->server_name, sizeof(info->server_name));
268 p->Recv_string(info->server_revision, sizeof(info->server_revision));
269 info->server_lang = p->Recv_uint8 ();
270 info->use_password = p->Recv_bool ();
271 info->clients_max = p->Recv_uint8 ();
272 info->clients_on = p->Recv_uint8 ();
273 info->spectators_on = p->Recv_uint8 ();
274 if (info->game_info_version < 3) { // 16 bits dates got scrapped and are read earlier
275 info->game_date = p->Recv_uint16() + DAYS_TILL_ORIGINAL_BASE_YEAR;
276 info->start_date = p->Recv_uint16() + DAYS_TILL_ORIGINAL_BASE_YEAR;
277 }
278 p->Recv_string(info->map_name, sizeof(info->map_name));
279 info->map_width = p->Recv_uint16();
280 info->map_height = p->Recv_uint16();
281 info->map_set = p->Recv_uint8 ();
282 info->dedicated = p->Recv_bool ();
283
284 if (info->server_lang >= NETWORK_NUM_LANGUAGES) info->server_lang = 0;
285 if (info->map_set >= NETWORK_NUM_LANDSCAPES) info->map_set = 0;
286 }
287 }
288
294 void NetworkUDPSocketHandler::HandleUDPPacket(Packet *p, NetworkAddress *client_addr)
295 {
296 PacketUDPType type;
297
298 /* New packet == new client, which has not quit yet */
299 this->Reopen();
300
301 type = (PacketUDPType)p->Recv_uint8();
302
303 switch (this->HasClientQuit() ? PACKET_UDP_END : type) {
304 case PACKET_UDP_CLIENT_FIND_SERVER: this->Receive_CLIENT_FIND_SERVER(p, client_addr); break;
305 case PACKET_UDP_SERVER_RESPONSE: this->Receive_SERVER_RESPONSE(p, client_addr); break;
306 case PACKET_UDP_CLIENT_DETAIL_INFO: this->Receive_CLIENT_DETAIL_INFO(p, client_addr); break;
307 case PACKET_UDP_SERVER_DETAIL_INFO: this->Receive_SERVER_DETAIL_INFO(p, client_addr); break;
308 case PACKET_UDP_SERVER_REGISTER: this->Receive_SERVER_REGISTER(p, client_addr); break;
309 case PACKET_UDP_MASTER_ACK_REGISTER: this->Receive_MASTER_ACK_REGISTER(p, client_addr); break;
310 case PACKET_UDP_CLIENT_GET_LIST: this->Receive_CLIENT_GET_LIST(p, client_addr); break;
311 case PACKET_UDP_MASTER_RESPONSE_LIST: this->Receive_MASTER_RESPONSE_LIST(p, client_addr); break;
312 case PACKET_UDP_SERVER_UNREGISTER: this->Receive_SERVER_UNREGISTER(p, client_addr); break;
313 case PACKET_UDP_CLIENT_GET_NEWGRFS: this->Receive_CLIENT_GET_NEWGRFS(p, client_addr); break;
314 case PACKET_UDP_SERVER_NEWGRFS: this->Receive_SERVER_NEWGRFS(p, client_addr); break;
315 case PACKET_UDP_MASTER_SESSION_KEY: this->Receive_MASTER_SESSION_KEY(p, client_addr); break;
316
317 default:
318 if (this->HasClientQuit()) {
319 DEBUG(net, 0, "[udp] received invalid packet type %d from %s", type, client_addr->GetAddressAsString().c_str());
320 } else {
321 DEBUG(net, 0, "[udp] received illegal packet from %s", client_addr->GetAddressAsString().c_str());
322 }
323 break;
324 }
325 }
326
332 void NetworkUDPSocketHandler::ReceiveInvalidPacket(PacketUDPType type, NetworkAddress *client_addr)
333 {
334 DEBUG(net, 0, "[udp] received packet type %d on wrong port from %s", type, client_addr->GetAddressAsString().c_str());
335 }
336
337 void NetworkUDPSocketHandler::Receive_CLIENT_FIND_SERVER(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_CLIENT_FIND_SERVER, client_addr); }
338 void NetworkUDPSocketHandler::Receive_SERVER_RESPONSE(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_RESPONSE, client_addr); }
339 void NetworkUDPSocketHandler::Receive_CLIENT_DETAIL_INFO(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_CLIENT_DETAIL_INFO, client_addr); }
340 void NetworkUDPSocketHandler::Receive_SERVER_DETAIL_INFO(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_DETAIL_INFO, client_addr); }
341 void NetworkUDPSocketHandler::Receive_SERVER_REGISTER(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_REGISTER, client_addr); }
342 void NetworkUDPSocketHandler::Receive_MASTER_ACK_REGISTER(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_MASTER_ACK_REGISTER, client_addr); }
343 void NetworkUDPSocketHandler::Receive_CLIENT_GET_LIST(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_CLIENT_GET_LIST, client_addr); }
344 void NetworkUDPSocketHandler::Receive_MASTER_RESPONSE_LIST(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_MASTER_RESPONSE_LIST, client_addr); }
345 void NetworkUDPSocketHandler::Receive_SERVER_UNREGISTER(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_UNREGISTER, client_addr); }
346 void NetworkUDPSocketHandler::Receive_CLIENT_GET_NEWGRFS(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_CLIENT_GET_NEWGRFS, client_addr); }
347 void NetworkUDPSocketHandler::Receive_SERVER_NEWGRFS(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_SERVER_NEWGRFS, client_addr); }
348 void NetworkUDPSocketHandler::Receive_MASTER_SESSION_KEY(Packet *p, NetworkAddress *client_addr) { this->ReceiveInvalidPacket(PACKET_UDP_MASTER_SESSION_KEY, client_addr); }
NetworkGameInfo
The game information that is sent from the server to the clients.
Definition: game.h:32
PACKET_UDP_CLIENT_GET_LIST
@ PACKET_UDP_CLIENT_GET_LIST
Request for serverlist from master server.
Definition: udp.h:27
NetworkUDPSocketHandler::Receive_SERVER_UNREGISTER
virtual void Receive_SERVER_UNREGISTER(Packet *p, NetworkAddress *client_addr)
A server unregisters itself at the master server.
Definition: udp.cpp:345
Packet::PrepareToSend
void PrepareToSend()
Writes the packet size from the raw packet from packet->size.
Definition: packet.cpp:61
PACKET_UDP_CLIENT_DETAIL_INFO
@ PACKET_UDP_CLIENT_DETAIL_INFO
Queries a game server about details of the game, such as companies.
Definition: udp.h:23
NetworkUDPSocketHandler::Receive_MASTER_SESSION_KEY
virtual void Receive_MASTER_SESSION_KEY(Packet *p, NetworkAddress *client_addr)
The master server sends us a session key.
Definition: udp.cpp:348
Packet::Recv_string
void Recv_string(char *buffer, size_t size, StringValidationSettings settings=SVS_REPLACE_WITH_QUESTION_MARK)
Reads a string till it finds a '\0' in the stream.
Definition: packet.cpp:286
NetworkAddress::GetAddress
const sockaddr_storage * GetAddress()
Get the address in its internal representation.
Definition: address.cpp:123
PACKET_UDP_CLIENT_GET_NEWGRFS
@ PACKET_UDP_CLIENT_GET_NEWGRFS
Requests the name for a list of GRFs (GRF_ID and MD5)
Definition: udp.h:30
NetworkGameInfo::companies_max
byte companies_max
Max companies allowed on server.
Definition: game.h:49
NetworkUDPSocketHandler::Receive_MASTER_RESPONSE_LIST
virtual void Receive_MASTER_RESPONSE_LIST(Packet *p, NetworkAddress *client_addr)
The server sends a list of servers.
Definition: udp.cpp:344
Packet::buffer
byte * buffer
The buffer of this packet, of basically variable length up to SEND_MTU.
Definition: packet.h:52
NetworkAddress::GetAddressLength
int GetAddressLength()
Get the (valid) length of the address.
Definition: address.h:103
NETWORK_NUM_LANDSCAPES
static const uint NETWORK_NUM_LANDSCAPES
The number of landscapes in OpenTTD.
Definition: config.h:70
PACKET_UDP_CLIENT_FIND_SERVER
@ PACKET_UDP_CLIENT_FIND_SERVER
Queries a game server for game information.
Definition: udp.h:21
NETWORK_NUM_LANGUAGES
static const uint NETWORK_NUM_LANGUAGES
Number of known languages (to the network protocol) + 1 for 'any'.
Definition: config.h:60
PACKET_UDP_SERVER_UNREGISTER
@ PACKET_UDP_SERVER_UNREGISTER
Request to be removed from the server-list.
Definition: udp.h:29
NetworkServerGameInfo::map_name
char map_name[NETWORK_NAME_LENGTH]
Map which is played ["random" for a randomized map].
Definition: game.h:25
HasBit
static bool HasBit(const T x, const uint8 y)
Checks if a bit in a value is set.
Definition: bitmath_func.hpp:103
PACKET_UDP_SERVER_REGISTER
@ PACKET_UDP_SERVER_REGISTER
Packet to register itself to the master server.
Definition: udp.h:25
NetworkUDPSocketHandler::CloseConnection
NetworkRecvStatus CloseConnection(bool error=true) override
Close the current connection; for TCP this will be mostly equivalent to Close(), but for UDP it just ...
Definition: udp.cpp:66
NetworkGameInfo::use_password
bool use_password
Is this server passworded?
Definition: game.h:44
NetworkUDPSocketHandler::Close
void Close() override
Close the given UDP socket.
Definition: udp.cpp:58
NetworkGameInfo::game_info_version
byte game_info_version
Version of the game info.
Definition: game.h:45
GRFConfig::ident
GRFIdentifier ident
grfid and md5sum to uniquely identify newgrfs
Definition: newgrf_config.h:157
NetworkUDPSocketHandler::Receive_SERVER_NEWGRFS
virtual void Receive_SERVER_NEWGRFS(Packet *p, NetworkAddress *client_addr)
The server returns information about some NewGRFs.
Definition: udp.cpp:347
NetworkUDPSocketHandler::NetworkUDPSocketHandler
NetworkUDPSocketHandler(NetworkAddressList *bind=nullptr)
Create an UDP socket but don't listen yet.
Definition: udp.cpp:23
NetworkUDPSocketHandler::Receive_SERVER_REGISTER
virtual void Receive_SERVER_REGISTER(Packet *p, NetworkAddress *client_addr)
Registers the server to the master server.
Definition: udp.cpp:341
NetworkGameInfo::map_width
uint16 map_width
Map width.
Definition: game.h:36
NetworkSocketHandler::CloseConnection
virtual NetworkRecvStatus CloseConnection(bool error=true)
Close the current connection; for TCP this will be mostly equivalent to Close(), but for UDP it just ...
Definition: core.h:59
Packet::Send_uint8
void Send_uint8(uint8 data)
Package a 8 bits integer in the packet.
Definition: packet.cpp:96
NetworkUDPSocketHandler::Receive_CLIENT_FIND_SERVER
virtual void Receive_CLIENT_FIND_SERVER(Packet *p, NetworkAddress *client_addr)
Queries to the server for information about the game.
Definition: udp.cpp:337
Packet::Send_uint32
void Send_uint32(uint32 data)
Package a 32 bits integer in the packet.
Definition: packet.cpp:117
PACKET_UDP_MASTER_SESSION_KEY
@ PACKET_UDP_MASTER_SESSION_KEY
Sends a fresh session key to the client.
Definition: udp.h:32
NetworkUDPSocketHandler::HandleIncomingNetworkGameInfoGRFConfig
virtual void HandleIncomingNetworkGameInfoGRFConfig(GRFConfig *config)
Function that is called for every GRFConfig that is read when receiving a NetworkGameInfo.
Definition: udp.h:228
SetNonBlocking
static bool SetNonBlocking(SOCKET d)
Try to set the socket into non-blocking mode.
Definition: os_abstraction.h:181
NETWORK_MAX_GRF_COUNT
static const uint NETWORK_MAX_GRF_COUNT
Maximum number of GRFs that can be sent.
Definition: config.h:58
NetworkGameInfo::start_date
Date start_date
When the game started.
Definition: game.h:34
NetworkUDPSocketHandler::Receive_SERVER_DETAIL_INFO
virtual void Receive_SERVER_DETAIL_INFO(Packet *p, NetworkAddress *client_addr)
Reply with detailed company information.
Definition: udp.cpp:340
NetworkGameInfo::server_lang
byte server_lang
Language of the server (we should make a nice table for this)
Definition: game.h:46
Packet::Recv_uint32
uint32 Recv_uint32()
Read a 32 bits integer from the packet.
Definition: packet.cpp:246
NetworkSocketHandler::Reopen
void Reopen()
Reopen the socket so we can send/receive stuff again.
Definition: core.h:72
GRFConfig
Information about GRF, used in the game and (part of it) in savegames.
Definition: newgrf_config.h:152
NetworkAddressList
std::vector< NetworkAddress > NetworkAddressList
Type for a list of addresses.
Definition: address.h:20
NetworkGameInfo::companies_on
byte companies_on
How many started companies do we have.
Definition: game.h:48
DEBUG
#define DEBUG(name, level,...)
Output a line of debugging information.
Definition: debug.h:35
Packet::Send_string
void Send_string(const char *data)
Sends a string over the network.
Definition: packet.cpp:148
NetworkUDPSocketHandler::Receive_CLIENT_GET_NEWGRFS
virtual void Receive_CLIENT_GET_NEWGRFS(Packet *p, NetworkAddress *client_addr)
The client requests information about some NewGRFs.
Definition: udp.cpp:346
GRFConfig::flags
uint8 flags
NOSAVE: GCF_Flags, bitset.
Definition: newgrf_config.h:167
Packet::PrepareToRead
void PrepareToRead()
Prepares the packet so it can be read.
Definition: packet.cpp:196
ConvertYMDToDate
Date ConvertYMDToDate(Year year, Month month, Day day)
Converts a tuple of Year, Month and Day to a Date.
Definition: date.cpp:149
NetworkUDPSocketHandler::sockets
SocketList sockets
The opened sockets.
Definition: udp.h:51
NetworkSocketHandler::SendGRFIdentifier
void SendGRFIdentifier(Packet *p, const GRFIdentifier *grf)
Serializes the GRFIdentifier (GRF ID and MD5 checksum) to the packet.
Definition: core.cpp:57
Packet::size
PacketSize size
The size of the whole packet for received packets.
Definition: packet.h:48
PACKET_UDP_END
@ PACKET_UDP_END
Must ALWAYS be on the end of this list!! (period)
Definition: udp.h:33
Date
int32 Date
The type to store our dates in.
Definition: date_type.h:14
SEND_MTU
static const uint16 SEND_MTU
Number of bytes we can pack in a single packet.
Definition: config.h:33
NetworkUDPSocketHandler::bind
NetworkAddressList bind
The address to bind to.
Definition: udp.h:49
Packet::Send_uint16
void Send_uint16(uint16 data)
Package a 16 bits integer in the packet.
Definition: packet.cpp:106
PACKET_UDP_MASTER_ACK_REGISTER
@ PACKET_UDP_MASTER_ACK_REGISTER
Packet indicating registration has succeeded.
Definition: udp.h:26
PACKET_UDP_SERVER_DETAIL_INFO
@ PACKET_UDP_SERVER_DETAIL_INFO
Reply of the game server about details of the game, such as companies.
Definition: udp.h:24
NetworkUDPSocketHandler::SendNetworkGameInfo
void SendNetworkGameInfo(Packet *p, const NetworkGameInfo *info)
Serializes the NetworkGameInfo struct to the packet.
Definition: udp.cpp:158
NetworkUDPSocketHandler::ReceiveNetworkGameInfo
void ReceiveNetworkGameInfo(Packet *p, NetworkGameInfo *info)
Deserializes the NetworkGameInfo struct from the packet.
Definition: udp.cpp:220
Packet
Internal entity of a packet.
Definition: packet.h:40
NetworkGameInfo::server_name
char server_name[NETWORK_NAME_LENGTH]
Server name.
Definition: game.h:38
NetworkUDPSocketHandler::ReceiveInvalidPacket
void ReceiveInvalidPacket(PacketUDPType, NetworkAddress *client_addr)
Helper for logging receiving invalid packets.
Definition: udp.cpp:332
PACKET_UDP_SERVER_NEWGRFS
@ PACKET_UDP_SERVER_NEWGRFS
Sends the list of NewGRF's requested.
Definition: udp.h:31
PACKET_UDP_SERVER_RESPONSE
@ PACKET_UDP_SERVER_RESPONSE
Reply of the game server with game information.
Definition: udp.h:22
Packet::Send_bool
void Send_bool(bool data)
Package a boolean in the packet.
Definition: packet.cpp:87
NetworkSocketHandler::HasClientQuit
bool HasClientQuit() const
Whether the current client connected to the socket has quit.
Definition: core.h:67
NetworkAddress
Wrapper for (un)resolved network addresses; there's no reason to transform a numeric IP to a string a...
Definition: address.h:29
Clamp
static T Clamp(const T a, const T min, const T max)
Clamp a value between an interval.
Definition: math_func.hpp:77
NetworkUDPSocketHandler::Receive_MASTER_ACK_REGISTER
virtual void Receive_MASTER_ACK_REGISTER(Packet *p, NetworkAddress *client_addr)
The master server acknowledges the registration.
Definition: udp.cpp:342
NetworkGameInfo::clients_max
byte clients_max
Max clients allowed on server.
Definition: game.h:47
Packet::Recv_bool
bool Recv_bool()
Read a boolean from the packet.
Definition: packet.cpp:208
NetworkRecvStatus
NetworkRecvStatus
Status of a network client; reasons why a client has quit.
Definition: core.h:22
NetworkUDPSocketHandler::HandleUDPPacket
void HandleUDPPacket(Packet *p, NetworkAddress *client_addr)
Handle an incoming packets by sending it to the correct function.
Definition: udp.cpp:294
GRFConfig::next
struct GRFConfig * next
NOSAVE: Next item in the linked list.
Definition: newgrf_config.h:177
NetworkUDPSocketHandler::Listen
bool Listen()
Start listening on the given host and port.
Definition: udp.cpp:43
udp.h
Packet::Recv_uint8
uint8 Recv_uint8()
Read a 8 bits integer from the packet.
Definition: packet.cpp:217
NetworkGameInfo::game_date
Date game_date
Current date.
Definition: game.h:35
error
void CDECL error(const char *s,...)
Error handling for fatal non-user errors.
Definition: openttd.cpp:131
NetworkSocketHandler::ReceiveGRFIdentifier
void ReceiveGRFIdentifier(Packet *p, GRFIdentifier *grf)
Deserializes the GRFIdentifier (GRF ID and MD5 checksum) from the packet.
Definition: core.cpp:71
NetworkUDPSocketHandler::Receive_CLIENT_GET_LIST
virtual void Receive_CLIENT_GET_LIST(Packet *p, NetworkAddress *client_addr)
The client requests a list of servers.
Definition: udp.cpp:343
NetworkGameInfo::server_revision
char server_revision[NETWORK_REVISION_LENGTH]
The version number the server is using (e.g.: 'r304' or 0.5.0)
Definition: game.h:40
PACKET_UDP_MASTER_RESPONSE_LIST
@ PACKET_UDP_MASTER_RESPONSE_LIST
Response from master server with server ip's + port's.
Definition: udp.h:28
NetworkAddress::IsFamily
bool IsFamily(int family)
Checks of this address is of the given family.
Definition: address.cpp:142
NetworkUDPSocketHandler::Receive_CLIENT_DETAIL_INFO
virtual void Receive_CLIENT_DETAIL_INFO(Packet *p, NetworkAddress *client_addr)
Query for detailed information about companies.
Definition: udp.cpp:339
NetworkGameInfo::spectators_on
byte spectators_on
How many spectators do we have?
Definition: game.h:50
NetworkUDPSocketHandler::ReceivePackets
void ReceivePackets()
Receive a packet at UDP level.
Definition: udp.cpp:115
NETWORK_RECV_STATUS_OKAY
@ NETWORK_RECV_STATUS_OKAY
Everything is okay.
Definition: core.h:23
NetworkUDPSocketHandler::Receive_SERVER_RESPONSE
virtual void Receive_SERVER_RESPONSE(Packet *p, NetworkAddress *client_addr)
Return of server information to the client.
Definition: udp.cpp:338
NETWORK_GAME_INFO_VERSION
static const byte NETWORK_GAME_INFO_VERSION
What version of game-info do we use?
Definition: config.h:36
NetworkGameInfo::map_height
uint16 map_height
Map height.
Definition: game.h:37
NetworkServerGameInfo::clients_on
byte clients_on
Current count of clients on server.
Definition: game.h:26
NetworkGameInfo::grfconfig
GRFConfig * grfconfig
List of NewGRF files used.
Definition: game.h:33
PacketUDPType
PacketUDPType
Enum with all types of UDP packets.
Definition: udp.h:20
NetworkAddress::GetAddressAsString
void GetAddressAsString(char *buffer, const char *last, bool with_family=true)
Get the address as a string, e.g.
Definition: address.cpp:77
NetworkUDPSocketHandler::SendPacket
void SendPacket(Packet *p, NetworkAddress *recv, bool all=false, bool broadcast=false)
Send a packet over UDP.
Definition: udp.cpp:79
GCF_STATIC
@ GCF_STATIC
GRF file is used statically (can be used in any MP game)
Definition: newgrf_config.h:25
NetworkGameInfo::dedicated
bool dedicated
Is this a dedicated server?
Definition: game.h:41
Packet::Recv_uint16
uint16 Recv_uint16()
Read a 16 bits integer from the packet.
Definition: packet.cpp:231
DAYS_TILL_ORIGINAL_BASE_YEAR
#define DAYS_TILL_ORIGINAL_BASE_YEAR
The offset in days from the '_date == 0' till 'ConvertYMDToDate(ORIGINAL_BASE_YEAR,...
Definition: date_type.h:80
NetworkGameInfo::spectators_max
byte spectators_max
Max spectators allowed on server.
Definition: game.h:51
MAX_YEAR
static const Year MAX_YEAR
MAX_YEAR, nicely rounded value of the number of years that can be encoded in a single 32 bits date,...
Definition: date_type.h:94
NetworkGameInfo::map_set
byte map_set
Graphical set.
Definition: game.h:52