1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/**
* @file core/udp.h Basic functions to receive and send UDP packets.
*/
#ifndef NETWORK_CORE_UDP_H
#define NETWORK_CORE_UDP_H
#include "address.h"
#include "packet.h"
/** Enum with all types of UDP packets. The order MUST not be changed **/
enum PacketUDPType {
PACKET_UDP_CLIENT_FIND_SERVER, ///< Queries a game server for game information
PACKET_UDP_SERVER_RESPONSE, ///< Reply of the game server with game information
PACKET_UDP_END, ///< Must ALWAYS be on the end of this list!! (period)
};
/** Base socket handler for all UDP sockets */
class NetworkUDPSocketHandler : public NetworkSocketHandler {
protected:
/** The address to bind to. */
NetworkAddressList bind;
/** The opened sockets. */
SocketList sockets;
void ReceiveInvalidPacket(PacketUDPType, NetworkAddress *client_addr);
/**
* Queries to the server for information about the game.
* @param p The received packet.
* @param client_addr The origin of the packet.
*/
virtual void Receive_CLIENT_FIND_SERVER(Packet *p, NetworkAddress *client_addr);
/**
* Response to a query letting the client know we are here.
* @param p The received packet.
* @param client_addr The origin of the packet.
*/
virtual void Receive_SERVER_RESPONSE(Packet *p, NetworkAddress *client_addr);
void HandleUDPPacket(Packet *p, NetworkAddress *client_addr);
public:
NetworkUDPSocketHandler(NetworkAddressList *bind = nullptr);
/** On destructing of this class, the socket needs to be closed */
virtual ~NetworkUDPSocketHandler() { this->CloseSocket(); }
bool Listen();
void CloseSocket();
void SendPacket(Packet *p, NetworkAddress *recv, bool all = false, bool broadcast = false);
void ReceivePackets();
};
#endif /* NETWORK_CORE_UDP_H */
|
