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![A Thousand Ships](/assets/img/avatar_default.png)
Random-access access to `List` when iterating is `O(n^2)` (`O(n)` when accessing a single element) * Removed subscript operator, in favor of a more explicit `get` * Added conversion from `Iterator` to `ConstIterator` * Remade existing operations into other solutions when applicable
206 lines
6.6 KiB
C++
206 lines
6.6 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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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("poll"), &UDPServer::poll);
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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("get_local_port"), &UDPServer::get_local_port);
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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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ClassDB::bind_method(D_METHOD("set_max_pending_connections", "max_pending_connections"), &UDPServer::set_max_pending_connections);
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ClassDB::bind_method(D_METHOD("get_max_pending_connections"), &UDPServer::get_max_pending_connections);
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ADD_PROPERTY(PropertyInfo(Variant::INT, "max_pending_connections", PROPERTY_HINT_RANGE, "0,256,1"), "set_max_pending_connections", "get_max_pending_connections");
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}
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Error UDPServer::poll() {
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ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
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if (!_sock->is_open()) {
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return ERR_UNCONFIGURED;
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}
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Error err;
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int read;
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IPAddress ip;
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uint16_t port;
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while (true) {
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err = _sock->recvfrom(recv_buffer, sizeof(recv_buffer), read, ip, port);
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if (err != OK) {
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if (err == ERR_BUSY) {
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break;
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}
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return FAILED;
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}
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Peer p;
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p.ip = ip;
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p.port = port;
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List<Peer>::Element *E = peers.find(p);
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if (!E) {
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E = pending.find(p);
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}
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if (E) {
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E->get().peer->store_packet(ip, port, recv_buffer, read);
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} else {
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if (pending.size() >= max_pending_connections) {
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// Drop connection.
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continue;
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}
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// It's a new peer, add it to the pending list.
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Peer peer;
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peer.ip = ip;
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peer.port = port;
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peer.peer = memnew(PacketPeerUDP);
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peer.peer->connect_shared_socket(_sock, ip, port, this);
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peer.peer->store_packet(ip, port, recv_buffer, read);
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pending.push_back(peer);
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}
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}
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return OK;
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}
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Error UDPServer::listen(uint16_t p_port, const IPAddress &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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}
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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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}
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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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return OK;
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}
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int UDPServer::get_local_port() const {
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uint16_t local_port;
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_sock->get_socket_address(nullptr, &local_port);
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return local_port;
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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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}
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return pending.size() > 0;
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}
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void UDPServer::set_max_pending_connections(int p_max) {
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ERR_FAIL_COND_MSG(p_max < 0, "Max pending connections value must be a positive number (0 means refuse new connections).");
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max_pending_connections = p_max;
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while (p_max > pending.size()) {
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List<Peer>::Element *E = pending.back();
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if (!E) {
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break;
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}
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memdelete(E->get().peer);
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pending.erase(E);
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}
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}
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int UDPServer::get_max_pending_connections() const {
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return max_pending_connections;
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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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Peer peer = pending.front()->get();
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pending.pop_front();
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peers.push_back(peer);
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return peer.peer;
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}
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void UDPServer::remove_peer(IPAddress p_ip, int p_port) {
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Peer peer;
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peer.ip = p_ip;
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peer.port = p_port;
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List<Peer>::Element *E = peers.find(peer);
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if (E) {
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peers.erase(E);
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}
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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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List<Peer>::Element *E = peers.front();
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while (E) {
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E->get().peer->disconnect_shared_socket();
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E = E->next();
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}
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E = pending.front();
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while (E) {
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E->get().peer->disconnect_shared_socket();
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memdelete(E->get().peer);
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E = E->next();
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}
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peers.clear();
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pending.clear();
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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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