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/*************************************************************************/
/* enet_connection.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef ENET_CONNECTION_H
#define ENET_CONNECTION_H
#include "core/object/ref_counted.h"
#include "core/crypto/crypto.h"
#include "enet_packet_peer.h"
#include <enet/enet.h>
class ENetConnection : public RefCounted {
GDCLASS(ENetConnection, RefCounted);
public:
enum CompressionMode {
COMPRESS_NONE = 0,
COMPRESS_RANGE_CODER,
COMPRESS_FASTLZ,
COMPRESS_ZLIB,
COMPRESS_ZSTD,
};
enum HostStatistic {
HOST_TOTAL_SENT_DATA,
HOST_TOTAL_SENT_PACKETS,
HOST_TOTAL_RECEIVED_DATA,
HOST_TOTAL_RECEIVED_PACKETS,
};
enum EventType {
EVENT_ERROR = -1,
EVENT_NONE = 0,
EVENT_CONNECT,
EVENT_DISCONNECT,
EVENT_RECEIVE,
};
struct Event {
Ref<ENetPacketPeer> peer;
enet_uint8 channel_id = 0;
enet_uint32 data = 0;
ENetPacket *packet = nullptr;
};
protected:
static void _bind_methods();
private:
ENetHost *host = nullptr;
List<Ref<ENetPacketPeer>> peers;
EventType _parse_event(const ENetEvent &p_event, Event &r_event);
Error _create(ENetAddress *p_address, int p_max_peers, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth);
Array _service(int p_timeout = 0);
void _broadcast(int p_channel, PackedByteArray p_packet, int p_flags);
Array _get_peers();
class Compressor {
private:
CompressionMode mode = COMPRESS_NONE;
Vector<uint8_t> src_mem;
Vector<uint8_t> dst_mem;
ENetCompressor enet_compressor;
Compressor(CompressionMode mode);
static size_t enet_compress(void *context, const ENetBuffer *inBuffers, size_t inBufferCount, size_t inLimit, enet_uint8 *outData, size_t outLimit);
static size_t enet_decompress(void *context, const enet_uint8 *inData, size_t inLimit, enet_uint8 *outData, size_t outLimit);
static void enet_compressor_destroy(void *context) {
memdelete((Compressor *)context);
}
public:
static void setup(ENetHost *p_host, CompressionMode p_mode);
};
public:
void broadcast(enet_uint8 p_channel, ENetPacket *p_packet);
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);
Error create_host(int p_max_peers = 32, int p_max_channels = 0, int p_in_bandwidth = 0, int p_out_bandwidth = 0);
void destroy();
Ref<ENetPacketPeer> connect_to_host(const String &p_address, int p_port, int p_channels, int p_data = 0);
EventType service(int p_timeout, Event &r_event);
int check_events(EventType &r_type, Event &r_event);
void flush();
void bandwidth_limit(int p_in_bandwidth = 0, int p_out_bandwidth = 0);
void channel_limit(int p_max_channels);
void bandwidth_throttle();
void compress(CompressionMode p_mode);
double pop_statistic(HostStatistic p_stat);
int get_max_channels() const;
// Extras
void get_peers(List<Ref<ENetPacketPeer>> &r_peers);
int get_local_port() const;
// Godot additions
Error dtls_server_setup(Ref<CryptoKey> p_key, Ref<X509Certificate> p_cert);
Error dtls_client_setup(Ref<X509Certificate> p_cert, const String &p_hostname, bool p_verify = true);
void refuse_new_connections(bool p_refuse);
ENetConnection() {}
~ENetConnection();
};
VARIANT_ENUM_CAST(ENetConnection::CompressionMode);
VARIANT_ENUM_CAST(ENetConnection::EventType);
VARIANT_ENUM_CAST(ENetConnection::HostStatistic);
#endif // ENET_CONNECTION_H
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