text: /*************************************************************************/
  /*  net_socket_posix.h                                                   */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
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  /*************************************************************************/
  
  #ifndef NET_SOCKET_UNIX_H
  #define NET_SOCKET_UNIX_H
  
  #include "core/io/net_socket.h"
  
  #if defined(WINDOWS_ENABLED)
  #include <winsock2.h>
  #include <ws2tcpip.h>
  #define SOCKET_TYPE SOCKET
  
  #else
  #include <sys/socket.h>
  #define SOCKET_TYPE int
  
  #endif
  
  class NetSocketPosix : public NetSocket {
  private:
  	SOCKET_TYPE _sock;
  	IP::Type _ip_type;
  	bool _is_stream;
  
  	enum NetError {
  		ERR_NET_WOULD_BLOCK,
  		ERR_NET_IS_CONNECTED,
  		ERR_NET_IN_PROGRESS,
  		ERR_NET_OTHER
  	};
  
  	NetError _get_socket_error() const;
  	void _set_socket(SOCKET_TYPE p_sock, IP::Type p_ip_type, bool p_is_stream);
  	_FORCE_INLINE_ Error _change_multicast_group(IP_Address p_ip, String p_if_name, bool p_add);
  	_FORCE_INLINE_ void _set_close_exec_enabled(bool p_enabled);
  
  protected:
  	static NetSocket *_create_func();
  
  	bool _can_use_ip(const IP_Address &p_ip, const bool p_for_bind) const;
  
  public:
  	static void make_default();
  	static void cleanup();
  	static void _set_ip_port(struct sockaddr_storage *p_addr, IP_Address &r_ip, uint16_t &r_port);
  	static size_t _set_addr_storage(struct sockaddr_storage *p_addr, const IP_Address &p_ip, uint16_t p_port, IP::Type p_ip_type);
  
  	virtual Error open(Type p_sock_type, IP::Type &ip_type);
  	virtual void close();
  	virtual Error bind(IP_Address p_addr, uint16_t p_port);
  	virtual Error listen(int p_max_pending);
  	virtual Error connect_to_host(IP_Address p_host, uint16_t p_port);
  	virtual Error poll(PollType p_type, int timeout) const;
  	virtual Error recv(uint8_t *p_buffer, int p_len, int &r_read);
  	virtual Error recvfrom(uint8_t *p_buffer, int p_len, int &r_read, IP_Address &r_ip, uint16_t &r_port, bool p_peek = false);
  	virtual Error send(const uint8_t *p_buffer, int p_len, int &r_sent);
  	virtual Error sendto(const uint8_t *p_buffer, int p_len, int &r_sent, IP_Address p_ip, uint16_t p_port);
  	virtual Ref<NetSocket> accept(IP_Address &r_ip, uint16_t &r_port);
  
  	virtual bool is_open() const;
  	virtual int get_available_bytes() const;
  
  	virtual Error set_broadcasting_enabled(bool p_enabled);
  	virtual void set_blocking_enabled(bool p_enabled);
  	virtual void set_ipv6_only_enabled(bool p_enabled);
  	virtual void set_tcp_no_delay_enabled(bool p_enabled);
  	virtual void set_reuse_address_enabled(bool p_enabled);
  	virtual void set_reuse_port_enabled(bool p_enabled);
  	virtual Error join_multicast_group(const IP_Address &p_multi_address, String p_if_name);
  	virtual Error leave_multicast_group(const IP_Address &p_multi_address, String p_if_name);
  
  	NetSocketPosix();
  	~NetSocketPosix();
  };
  
  #endif
  