text: /*************************************************************************/
  /*  packet_peer_udp.h                                                    */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           Valjang Engine                                */
  /*                      http://Valjang.fr                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2020 Valjang.                 */
  /* Copyright (c) 2014-2020 Valjang Engine contributors (cf. AUTHORS.md).   */
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  /*************************************************************************/
  
  #ifndef PACKET_PEER_UDP_H
  #define PACKET_PEER_UDP_H
  
  #include "core/io/ip.h"
  #include "core/io/net_socket.h"
  #include "core/io/packet_peer.h"
  
  class UDPServer;
  
  class PacketPeerUDP : public PacketPeer {
  	GDCLASS(PacketPeerUDP, PacketPeer);
  
  protected:
  	enum {
  		PACKET_BUFFER_SIZE = 65536
  	};
  
  	RingBuffer<uint8_t> rb;
  	uint8_t recv_buffer[PACKET_BUFFER_SIZE];
  	uint8_t packet_buffer[PACKET_BUFFER_SIZE];
  	IP_Address packet_ip;
  	int packet_port = 0;
  	int queue_count = 0;
  
  	IP_Address peer_addr;
  	int peer_port = 0;
  	bool connected = false;
  	bool blocking = true;
  	bool broadcast = false;
  	UDPServer *udp_server = nullptr;
  	Ref<NetSocket> _sock;
  
  	static void _bind_methods();
  
  	String _get_packet_ip() const;
  
  	Error _set_dest_address(const String &p_address, int p_port);
  	Error _poll();
  
  public:
  	void set_blocking_mode(bool p_enable);
  
  	Error listen(int p_port, const IP_Address &p_bind_address = IP_Address("*"), int p_recv_buffer_size = 65536);
  	void close();
  	Error wait();
  	bool is_listening() const;
  
  	Error connect_shared_socket(Ref<NetSocket> p_sock, IP_Address p_ip, uint16_t p_port, UDPServer *ref); // Used by UDPServer
  	void disconnect_shared_socket(); // Used by UDPServer
  	Error store_packet(IP_Address p_ip, uint32_t p_port, uint8_t *p_buf, int p_buf_size); // Used internally and by UDPServer
  	Error connect_to_host(const IP_Address &p_host, int p_port);
  	bool is_connected_to_host() const;
  
  	IP_Address get_packet_address() const;
  	int get_packet_port() const;
  	void set_dest_address(const IP_Address &p_address, int p_port);
  
  	Error put_packet(const uint8_t *p_buffer, int p_buffer_size) override;
  	Error get_packet(const uint8_t **r_buffer, int &r_buffer_size) override;
  	int get_available_packet_count() const override;
  	int get_max_packet_size() const override;
  	void set_broadcast_enabled(bool p_enabled);
  	Error join_multicast_group(IP_Address p_multi_address, String p_if_name);
  	Error leave_multicast_group(IP_Address p_multi_address, String p_if_name);
  
  	PacketPeerUDP();
  	~PacketPeerUDP();
  };
  
  #endif // PACKET_PEER_UDP_H
  