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On Unix systems, sockets are like file descriptors, and file descriptors are usually shared among child processes. This means, that if we spawn a subprocess (or we fork) like we do in the editor, open file descriptors will leak to the new process. This causes issue with sockets as they might remain open and bound (listening) when the original process closes.
106 lines
4.6 KiB
C++
106 lines
4.6 KiB
C++
/*************************************************************************/
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/* net_socket_posix.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef NET_SOCKET_UNIX_H
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#define NET_SOCKET_UNIX_H
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#include "core/io/net_socket.h"
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#if defined(WINDOWS_ENABLED)
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#define SOCKET_TYPE SOCKET
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#else
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#include <sys/socket.h>
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#define SOCKET_TYPE int
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#endif
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class NetSocketPosix : public NetSocket {
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private:
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SOCKET_TYPE _sock;
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IP::Type _ip_type;
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bool _is_stream;
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enum NetError {
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ERR_NET_WOULD_BLOCK,
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ERR_NET_IS_CONNECTED,
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ERR_NET_IN_PROGRESS,
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ERR_NET_OTHER
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};
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NetError _get_socket_error();
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void _set_socket(SOCKET_TYPE p_sock, IP::Type p_ip_type, bool p_is_stream);
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_FORCE_INLINE_ Error _change_multicast_group(IP_Address p_ip, String p_if_name, bool p_add);
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_FORCE_INLINE_ void _set_close_exec_enabled(bool p_enabled);
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protected:
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static NetSocket *_create_func();
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bool _can_use_ip(const IP_Address &p_ip, const bool p_for_bind) const;
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public:
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static void make_default();
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static void cleanup();
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static void _set_ip_port(struct sockaddr_storage *p_addr, IP_Address &r_ip, uint16_t &r_port);
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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);
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virtual Error open(Type p_sock_type, IP::Type &ip_type);
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virtual void close();
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virtual Error bind(IP_Address p_addr, uint16_t p_port);
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virtual Error listen(int p_max_pending);
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virtual Error connect_to_host(IP_Address p_host, uint16_t p_port);
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virtual Error poll(PollType p_type, int timeout) const;
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virtual Error recv(uint8_t *p_buffer, int p_len, int &r_read);
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virtual Error recvfrom(uint8_t *p_buffer, int p_len, int &r_read, IP_Address &r_ip, uint16_t &r_port);
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virtual Error send(const uint8_t *p_buffer, int p_len, int &r_sent);
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virtual Error sendto(const uint8_t *p_buffer, int p_len, int &r_sent, IP_Address p_ip, uint16_t p_port);
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virtual Ref<NetSocket> accept(IP_Address &r_ip, uint16_t &r_port);
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virtual bool is_open() const;
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virtual int get_available_bytes() const;
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virtual void set_broadcasting_enabled(bool p_enabled);
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virtual void set_blocking_enabled(bool p_enabled);
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virtual void set_ipv6_only_enabled(bool p_enabled);
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virtual void set_tcp_no_delay_enabled(bool p_enabled);
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virtual void set_reuse_address_enabled(bool p_enabled);
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virtual void set_reuse_port_enabled(bool p_enabled);
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virtual Error join_multicast_group(const IP_Address &p_multi_address, String p_if_name);
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virtual Error leave_multicast_group(const IP_Address &p_multi_address, String p_if_name);
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NetSocketPosix();
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~NetSocketPosix();
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};
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#endif
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