2c8340bee9
UDP sockets can be "connected" to filter packets from a specific source. In case of a bound socket (e.g. server), a new socket can be created on the same address/port that will receive all packets that are not filtered by a more specific socket (e.g. the previously connect socket). This way, a UDPServer can listen to new packets, and return a new PacketPeerUDP when receiving one, knowing that is a "new client".
120 lines
4.2 KiB
C++
120 lines
4.2 KiB
C++
/*************************************************************************/
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/* udp_server.cpp */
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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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#include "udp_server.h"
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void UDPServer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("listen", "port", "bind_address"), &UDPServer::listen, DEFVAL("*"));
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ClassDB::bind_method(D_METHOD("is_connection_available"), &UDPServer::is_connection_available);
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ClassDB::bind_method(D_METHOD("is_listening"), &UDPServer::is_listening);
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ClassDB::bind_method(D_METHOD("take_connection"), &UDPServer::take_connection);
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ClassDB::bind_method(D_METHOD("stop"), &UDPServer::stop);
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}
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Error UDPServer::listen(uint16_t p_port, const IP_Address &p_bind_address) {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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ERR_FAIL_COND_V(_sock->is_open(), ERR_ALREADY_IN_USE);
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ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(), ERR_INVALID_PARAMETER);
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Error err;
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IP::Type ip_type = IP::TYPE_ANY;
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if (p_bind_address.is_valid())
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ip_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
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err = _sock->open(NetSocket::TYPE_UDP, ip_type);
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if (err != OK)
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return ERR_CANT_CREATE;
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_sock->set_blocking_enabled(false);
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_sock->set_reuse_address_enabled(true);
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err = _sock->bind(p_bind_address, p_port);
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if (err != OK) {
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stop();
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return err;
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}
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bind_address = p_bind_address;
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bind_port = p_port;
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return OK;
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}
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bool UDPServer::is_listening() const {
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ERR_FAIL_COND_V(!_sock.is_valid(), false);
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return _sock->is_open();
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}
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bool UDPServer::is_connection_available() const {
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ERR_FAIL_COND_V(!_sock.is_valid(), false);
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if (!_sock->is_open())
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return false;
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Error err = _sock->poll(NetSocket::POLL_TYPE_IN, 0);
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return (err == OK);
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}
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Ref<PacketPeerUDP> UDPServer::take_connection() {
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Ref<PacketPeerUDP> conn;
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if (!is_connection_available()) {
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return conn;
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}
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conn = Ref<PacketPeerUDP>(memnew(PacketPeerUDP));
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conn->connect_socket(_sock);
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_sock = Ref<NetSocket>(NetSocket::create());
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listen(bind_port, bind_address);
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return conn;
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}
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void UDPServer::stop() {
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if (_sock.is_valid()) {
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_sock->close();
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}
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bind_port = 0;
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bind_address = IP_Address();
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}
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UDPServer::UDPServer() :
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_sock(Ref<NetSocket>(NetSocket::create())) {
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}
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UDPServer::~UDPServer() {
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stop();
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}
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