373d5ea103
It used to call `enet_host_service` until all events were consumed, but that also meant constantly polling the connection leading to potentially unbounded processing time. It now only service the connection once, and instead consumes all the retrieved events via `enet_host_check_events`.
140 lines
5.4 KiB
C++
140 lines
5.4 KiB
C++
/*************************************************************************/
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/* enet_connection.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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 ENET_CONNECTION_H
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#define ENET_CONNECTION_H
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#include "core/object/ref_counted.h"
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#include "core/crypto/crypto.h"
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#include "enet_packet_peer.h"
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#include <enet/enet.h>
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class ENetConnection : public RefCounted {
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GDCLASS(ENetConnection, RefCounted);
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public:
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enum CompressionMode {
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COMPRESS_NONE = 0,
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COMPRESS_RANGE_CODER,
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COMPRESS_FASTLZ,
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COMPRESS_ZLIB,
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COMPRESS_ZSTD,
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};
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enum HostStatistic {
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HOST_TOTAL_SENT_DATA,
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HOST_TOTAL_SENT_PACKETS,
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HOST_TOTAL_RECEIVED_DATA,
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HOST_TOTAL_RECEIVED_PACKETS,
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};
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enum EventType {
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EVENT_ERROR = -1,
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EVENT_NONE = 0,
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EVENT_CONNECT,
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EVENT_DISCONNECT,
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EVENT_RECEIVE,
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};
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struct Event {
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Ref<ENetPacketPeer> peer;
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enet_uint8 channel_id = 0;
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enet_uint32 data = 0;
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ENetPacket *packet = nullptr;
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};
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protected:
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static void _bind_methods();
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private:
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ENetHost *host = nullptr;
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List<Ref<ENetPacketPeer>> peers;
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EventType _parse_event(const ENetEvent &p_event, Event &r_event);
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Error _create(ENetAddress *p_address, int p_max_peers, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth);
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Array _service(int p_timeout = 0);
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void _broadcast(int p_channel, PackedByteArray p_packet, int p_flags);
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Array _get_peers();
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class Compressor {
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private:
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CompressionMode mode = COMPRESS_NONE;
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Vector<uint8_t> src_mem;
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Vector<uint8_t> dst_mem;
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ENetCompressor enet_compressor;
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Compressor(CompressionMode mode);
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static size_t enet_compress(void *context, const ENetBuffer *inBuffers, size_t inBufferCount, size_t inLimit, enet_uint8 *outData, size_t outLimit);
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static size_t enet_decompress(void *context, const enet_uint8 *inData, size_t inLimit, enet_uint8 *outData, size_t outLimit);
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static void enet_compressor_destroy(void *context) {
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memdelete((Compressor *)context);
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}
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public:
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static void setup(ENetHost *p_host, CompressionMode p_mode);
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};
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public:
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void broadcast(enet_uint8 p_channel, ENetPacket *p_packet);
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Error create_host_bound(const IPAddress &p_bind_address = IPAddress("*"), int p_port = 0, int p_max_peers = 32, int p_max_channels = 0, int p_in_bandwidth = 0, int p_out_bandwidth = 0);
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Error create_host(int p_max_peers = 32, int p_max_channels = 0, int p_in_bandwidth = 0, int p_out_bandwidth = 0);
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void destroy();
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Ref<ENetPacketPeer> connect_to_host(const String &p_address, int p_port, int p_channels, int p_data = 0);
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EventType service(int p_timeout, Event &r_event);
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int check_events(EventType &r_type, Event &r_event);
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void flush();
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void bandwidth_limit(int p_in_bandwidth = 0, int p_out_bandwidth = 0);
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void channel_limit(int p_max_channels);
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void bandwidth_throttle();
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void compress(CompressionMode p_mode);
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double pop_statistic(HostStatistic p_stat);
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int get_max_channels() const;
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// Extras
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void get_peers(List<Ref<ENetPacketPeer>> &r_peers);
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int get_local_port() const;
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// Godot additions
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Error dtls_server_setup(Ref<CryptoKey> p_key, Ref<X509Certificate> p_cert);
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Error dtls_client_setup(Ref<X509Certificate> p_cert, const String &p_hostname, bool p_verify = true);
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void refuse_new_connections(bool p_refuse);
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ENetConnection() {}
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~ENetConnection();
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};
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VARIANT_ENUM_CAST(ENetConnection::CompressionMode);
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VARIANT_ENUM_CAST(ENetConnection::EventType);
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VARIANT_ENUM_CAST(ENetConnection::HostStatistic);
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#endif // ENET_CONNECTION_H
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