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godot/modules/enet/enet_connection.cpp

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One Copyright Update to rule them all As many open source projects have started doing it, we're removing the current year from the copyright notice, so that we don't need to bump it every year. It seems like only the first year of publication is technically relevant for copyright notices, and even that seems to be something that many companies stopped listing altogether (in a version controlled codebase, the commits are a much better source of date of publication than a hardcoded copyright statement). We also now list Godot Engine contributors first as we're collectively the current maintainers of the project, and we clarify that the "exclusive" copyright of the co-founders covers the timespan before opensourcing (their further contributions are included as part of Godot Engine contributors). Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 12:25:55 +00:00
/**************************************************************************/
/* enet_connection.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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. */
/**************************************************************************/
[Net] Implement lower level ENet wrappers.
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#include "enet_connection.h"
#include "enet_packet_peer.h"
#include "core/io/compression.h"
#include "core/io/ip.h"
Replace Array return types with TypedArray 3
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#include "core/variant/typed_array.h"
[Net] Implement lower level ENet wrappers.
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void ENetConnection::broadcast(enet_uint8 p_channel, ENetPacket *p_packet) {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
ERR_FAIL_COND_MSG(p_channel >= host->channelLimit, vformat("Unable to send packet on channel %d, max channels: %d", p_channel, (int)host->channelLimit));
enet_host_broadcast(host, p_channel, p_packet);
}
Error ENetConnection::create_host_bound(const IPAddress &p_bind_address, int p_port, int p_max_peers, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth) {
ERR_FAIL_COND_V_MSG(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(), ERR_INVALID_PARAMETER, "Invalid bind IP.");
ERR_FAIL_COND_V_MSG(p_port < 0 || p_port > 65535, ERR_INVALID_PARAMETER, "The local port number must be between 0 and 65535 (inclusive).");
ENetAddress address;
memset(&address, 0, sizeof(address));
address.port = p_port;
#ifdef GODOT_ENET
if (p_bind_address.is_wildcard()) {
address.wildcard = 1;
} else {
enet_address_set_ip(&address, p_bind_address.get_ipv6(), 16);
}
#else
if (p_bind_address.is_wildcard()) {
address.host = 0;
} else {
ERR_FAIL_COND_V(!p_bind_address.is_ipv4(), ERR_INVALID_PARAMETER);
address.host = *(uint32_t *)p_bind_address.get_ipv4();
}
#endif
return _create(&address, p_max_peers, p_max_channels, p_in_bandwidth, p_out_bandwidth);
}
Error ENetConnection::create_host(int p_max_peers, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth) {
return _create(nullptr, p_max_peers, p_max_channels, p_in_bandwidth, p_out_bandwidth);
}
void ENetConnection::destroy() {
ERR_FAIL_COND_MSG(!host, "Host already destroyed");
for (List<Ref<ENetPacketPeer>>::Element *E = peers.front(); E; E = E->next()) {
E->get()->_on_disconnect();
}
peers.clear();
enet_host_destroy(host);
host = nullptr;
}
Ref<ENetPacketPeer> ENetConnection::connect_to_host(const String &p_address, int p_port, int p_channels, int p_data) {
Ref<ENetPacketPeer> out;
ERR_FAIL_COND_V_MSG(!host, out, "The ENetConnection instance isn't currently active.");
ERR_FAIL_COND_V_MSG(peers.size(), out, "The ENetConnection is already connected to a peer.");
ERR_FAIL_COND_V_MSG(p_port < 1 || p_port > 65535, out, "The remote port number must be between 1 and 65535 (inclusive).");
IPAddress ip;
if (p_address.is_valid_ip_address()) {
ip = p_address;
} else {
#ifdef GODOT_ENET
ip = IP::get_singleton()->resolve_hostname(p_address);
#else
ip = IP::get_singleton()->resolve_hostname(p_address, IP::TYPE_IPV4);
#endif
ERR_FAIL_COND_V_MSG(!ip.is_valid(), out, "Couldn't resolve the server IP address or domain name.");
}
ENetAddress address;
#ifdef GODOT_ENET
enet_address_set_ip(&address, ip.get_ipv6(), 16);
#else
ERR_FAIL_COND_V_MSG(!ip.is_ipv4(), out, "Connecting to an IPv6 server isn't supported when using vanilla ENet. Recompile Godot with the bundled ENet library.");
address.host = *(uint32_t *)ip.get_ipv4();
#endif
address.port = p_port;
// Initiate connection, allocating enough channels
[Net] Fix ENet 'connect_to_host' creating only one channel. Passing `0` to `enet_host_create` will allow the maximum amount of channel supported by ENet. For some reasons, `connect_to_host` will instead only create 1 channel when passed `0`. This commit normalize the behaviour to always allocate the maximum allowed channels when passing `0`.
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ENetPeer *peer = enet_host_connect(host, &address, p_channels > 0 ? p_channels : ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT, p_data);
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if (peer == nullptr) {
return nullptr;
}
out = Ref<ENetPacketPeer>(memnew(ENetPacketPeer(peer)));
peers.push_back(out);
return out;
}
[Net] ENet poll now only service the connection once. 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`.
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ENetConnection::EventType ENetConnection::_parse_event(const ENetEvent &p_event, Event &r_event) {
switch (p_event.type) {
[Net] Implement lower level ENet wrappers.
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case ENET_EVENT_TYPE_CONNECT: {
[Net] ENet poll now only service the connection once. 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`.
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if (p_event.peer->data == nullptr) {
Ref<ENetPacketPeer> pp = memnew(ENetPacketPeer(p_event.peer));
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peers.push_back(pp);
}
[Net] ENet poll now only service the connection once. 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`.
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r_event.peer = Ref<ENetPacketPeer>((ENetPacketPeer *)p_event.peer->data);
r_event.data = p_event.data;
[Net] Implement lower level ENet wrappers.
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return EVENT_CONNECT;
} break;
case ENET_EVENT_TYPE_DISCONNECT: {
// A peer disconnected.
[Net] ENet poll now only service the connection once. 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`.
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if (p_event.peer->data != nullptr) {
Ref<ENetPacketPeer> pp = Ref<ENetPacketPeer>((ENetPacketPeer *)p_event.peer->data);
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pp->_on_disconnect();
peers.erase(pp);
r_event.peer = pp;
[Net] ENet poll now only service the connection once. 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`.
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r_event.data = p_event.data;
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return EVENT_DISCONNECT;
}
return EVENT_ERROR;
} break;
case ENET_EVENT_TYPE_RECEIVE: {
// Packet reveived.
[Net] ENet poll now only service the connection once. 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`.
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if (p_event.peer->data != nullptr) {
Ref<ENetPacketPeer> pp = Ref<ENetPacketPeer>((ENetPacketPeer *)p_event.peer->data);
r_event.peer = Ref<ENetPacketPeer>((ENetPacketPeer *)p_event.peer->data);
r_event.channel_id = p_event.channelID;
r_event.packet = p_event.packet;
[Net] Implement lower level ENet wrappers.
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return EVENT_RECEIVE;
}
return EVENT_ERROR;
} break;
case ENET_EVENT_TYPE_NONE:
return EVENT_NONE;
default:
return EVENT_NONE;
}
}
[Net] ENet poll now only service the connection once. 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`.
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ENetConnection::EventType ENetConnection::service(int p_timeout, Event &r_event) {
ERR_FAIL_COND_V_MSG(!host, EVENT_ERROR, "The ENetConnection instance isn't currently active.");
ERR_FAIL_COND_V(r_event.peer.is_valid(), EVENT_ERROR);
// Drop peers that have already been disconnected.
// NOTE: Forcibly disconnected peers (i.e. peers disconnected via
// enet_peer_disconnect*) do not trigger DISCONNECTED events.
List<Ref<ENetPacketPeer>>::Element *E = peers.front();
while (E) {
if (!E->get()->is_active()) {
peers.erase(E->get());
}
E = E->next();
}
ENetEvent event;
int ret = enet_host_service(host, &event, p_timeout);
if (ret < 0) {
return EVENT_ERROR;
} else if (ret == 0) {
return EVENT_NONE;
}
return _parse_event(event, r_event);
}
int ENetConnection::check_events(EventType &r_type, Event &r_event) {
ERR_FAIL_COND_V_MSG(!host, -1, "The ENetConnection instance isn't currently active.");
ENetEvent event;
int ret = enet_host_check_events(host, &event);
if (ret < 0) {
r_type = EVENT_ERROR;
return ret;
}
r_type = _parse_event(event, r_event);
return ret;
}
[Net] Implement lower level ENet wrappers.
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void ENetConnection::flush() {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
enet_host_flush(host);
}
void ENetConnection::bandwidth_limit(int p_in_bandwidth, int p_out_bandwidth) {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
enet_host_bandwidth_limit(host, p_in_bandwidth, p_out_bandwidth);
}
void ENetConnection::channel_limit(int p_max_channels) {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
enet_host_channel_limit(host, p_max_channels);
}
void ENetConnection::bandwidth_throttle() {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
enet_host_bandwidth_throttle(host);
}
void ENetConnection::compress(CompressionMode p_mode) {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
Compressor::setup(host, p_mode);
}
double ENetConnection::pop_statistic(HostStatistic p_stat) {
ERR_FAIL_COND_V_MSG(!host, 0, "The ENetConnection instance isn't currently active.");
uint32_t *ptr = nullptr;
switch (p_stat) {
case HOST_TOTAL_SENT_DATA:
ptr = &(host->totalSentData);
break;
case HOST_TOTAL_SENT_PACKETS:
ptr = &(host->totalSentPackets);
break;
case HOST_TOTAL_RECEIVED_DATA:
ptr = &(host->totalReceivedData);
break;
case HOST_TOTAL_RECEIVED_PACKETS:
ptr = &(host->totalReceivedPackets);
break;
}
ERR_FAIL_COND_V_MSG(ptr == nullptr, 0, "Invalid statistic: " + itos(p_stat));
uint32_t ret = *ptr;
*ptr = 0;
return ret;
}
int ENetConnection::get_max_channels() const {
ERR_FAIL_COND_V_MSG(!host, 0, "The ENetConnection instance isn't currently active.");
return host->channelLimit;
}
int ENetConnection::get_local_port() const {
ERR_FAIL_COND_V_MSG(!host, 0, "The ENetConnection instance isn't currently active.");
ERR_FAIL_COND_V_MSG(!(host->socket), 0, "The ENetConnection instance isn't currently bound");
ENetAddress address;
ERR_FAIL_COND_V_MSG(enet_socket_get_address(host->socket, &address), 0, "Unable to get socket address");
return address.port;
}
void ENetConnection::get_peers(List<Ref<ENetPacketPeer>> &r_peers) {
for (const Ref<ENetPacketPeer> &I : peers) {
r_peers.push_back(I);
}
}
Replace Array return types with TypedArray 3
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TypedArray<ENetPacketPeer> ENetConnection::_get_peers() {
[Net] Implement lower level ENet wrappers.
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ERR_FAIL_COND_V_MSG(!host, Array(), "The ENetConnection instance isn't currently active.");
Replace Array return types with TypedArray 3
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TypedArray<ENetPacketPeer> out;
[Net] Implement lower level ENet wrappers.
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for (const Ref<ENetPacketPeer> &I : peers) {
out.push_back(I);
}
return out;
}
[NET] Refactor TLS configuration. Use a TLSOptions configuration object which is created via static functions. - "TLSOptions.client": uses the standard CA and common name verification. - "TLSOptions.client_unsafe": uses optional CA verification (i.e. if specified) - "TLSOptions.server": is the standard server configuration (chain + key) This will allow us to expand the TLS configuration options to include e.g. mutual authentication without bloating the classes that uses StreamPeerTLS and PacketPeerDTLS as underlying peers.
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Error ENetConnection::dtls_server_setup(const Ref<TLSOptions> &p_options) {
[Net] Implement lower level ENet wrappers.
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#ifdef GODOT_ENET
ERR_FAIL_COND_V_MSG(!host, ERR_UNCONFIGURED, "The ENetConnection instance isn't currently active.");
[NET] Refactor TLS configuration. Use a TLSOptions configuration object which is created via static functions. - "TLSOptions.client": uses the standard CA and common name verification. - "TLSOptions.client_unsafe": uses optional CA verification (i.e. if specified) - "TLSOptions.server": is the standard server configuration (chain + key) This will allow us to expand the TLS configuration options to include e.g. mutual authentication without bloating the classes that uses StreamPeerTLS and PacketPeerDTLS as underlying peers.
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ERR_FAIL_COND_V(p_options.is_null() || !p_options->is_server(), ERR_INVALID_PARAMETER);
return enet_host_dtls_server_setup(host, const_cast<TLSOptions *>(p_options.ptr())) ? FAILED : OK;
[Net] Implement lower level ENet wrappers.
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#else
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "ENet DTLS support not available in this build.");
#endif
}
void ENetConnection::refuse_new_connections(bool p_refuse) {
#ifdef GODOT_ENET
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
enet_host_refuse_new_connections(host, p_refuse);
#else
ERR_FAIL_MSG("ENet DTLS support not available in this build.");
#endif
}
[NET] Refactor TLS configuration. Use a TLSOptions configuration object which is created via static functions. - "TLSOptions.client": uses the standard CA and common name verification. - "TLSOptions.client_unsafe": uses optional CA verification (i.e. if specified) - "TLSOptions.server": is the standard server configuration (chain + key) This will allow us to expand the TLS configuration options to include e.g. mutual authentication without bloating the classes that uses StreamPeerTLS and PacketPeerDTLS as underlying peers.
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Error ENetConnection::dtls_client_setup(const String &p_hostname, const Ref<TLSOptions> &p_options) {
[Net] Implement lower level ENet wrappers.
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#ifdef GODOT_ENET
ERR_FAIL_COND_V_MSG(!host, ERR_UNCONFIGURED, "The ENetConnection instance isn't currently active.");
[NET] Refactor TLS configuration. Use a TLSOptions configuration object which is created via static functions. - "TLSOptions.client": uses the standard CA and common name verification. - "TLSOptions.client_unsafe": uses optional CA verification (i.e. if specified) - "TLSOptions.server": is the standard server configuration (chain + key) This will allow us to expand the TLS configuration options to include e.g. mutual authentication without bloating the classes that uses StreamPeerTLS and PacketPeerDTLS as underlying peers.
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ERR_FAIL_COND_V(p_options.is_null() || p_options->is_server(), ERR_INVALID_PARAMETER);
return enet_host_dtls_client_setup(host, p_hostname.utf8().get_data(), const_cast<TLSOptions *>(p_options.ptr())) ? FAILED : OK;
[Net] Implement lower level ENet wrappers.
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#else
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "ENet DTLS support not available in this build.");
#endif
}
Error ENetConnection::_create(ENetAddress *p_address, int p_max_peers, int p_max_channels, int p_in_bandwidth, int p_out_bandwidth) {
ERR_FAIL_COND_V_MSG(host != nullptr, ERR_ALREADY_IN_USE, "The ENetConnection instance is already active.");
ERR_FAIL_COND_V_MSG(p_max_peers < 1 || p_max_peers > 4095, ERR_INVALID_PARAMETER, "The number of clients must be set between 1 and 4095 (inclusive).");
ERR_FAIL_COND_V_MSG(p_max_channels < 0 || p_max_channels > ENET_PROTOCOL_MAXIMUM_CHANNEL_COUNT, ERR_INVALID_PARAMETER, "Invalid channel count. Must be between 0 and 255 (0 means maximum, i.e. 255)");
ERR_FAIL_COND_V_MSG(p_in_bandwidth < 0, ERR_INVALID_PARAMETER, "The incoming bandwidth limit must be greater than or equal to 0 (0 disables the limit).");
ERR_FAIL_COND_V_MSG(p_out_bandwidth < 0, ERR_INVALID_PARAMETER, "The outgoing bandwidth limit must be greater than or equal to 0 (0 disables the limit).");
host = enet_host_create(p_address /* the address to bind the server host to */,
p_max_peers /* allow up to p_max_peers connections */,
p_max_channels /* allow up to p_max_channel to be used */,
p_in_bandwidth /* limit incoming bandwidth if > 0 */,
p_out_bandwidth /* limit outgoing bandwidth if > 0 */);
ERR_FAIL_COND_V_MSG(!host, ERR_CANT_CREATE, "Couldn't create an ENet host.");
return OK;
}
Array ENetConnection::_service(int p_timeout) {
Array out;
Event event;
Ref<ENetPacketPeer> peer;
EventType ret = service(p_timeout, event);
out.push_back(ret);
out.push_back(event.peer);
out.push_back(event.data);
out.push_back(event.channel_id);
if (event.packet && event.peer.is_valid()) {
event.peer->_queue_packet(event.packet);
}
return out;
}
void ENetConnection::_broadcast(int p_channel, PackedByteArray p_packet, int p_flags) {
ERR_FAIL_COND_MSG(!host, "The ENetConnection instance isn't currently active.");
ERR_FAIL_COND_MSG(p_channel < 0 || p_channel > (int)host->channelLimit, "Invalid channel");
ERR_FAIL_COND_MSG(p_flags & ~ENetPacketPeer::FLAG_ALLOWED, "Invalid flags");
ENetPacket *pkt = enet_packet_create(p_packet.ptr(), p_packet.size(), p_flags);
broadcast(p_channel, pkt);
}
void ENetConnection::_bind_methods() {
ClassDB::bind_method(D_METHOD("create_host_bound", "bind_address", "bind_port", "max_peers", "max_channels", "in_bandwidth", "out_bandwidth"), &ENetConnection::create_host_bound, DEFVAL(32), DEFVAL(0), DEFVAL(0), DEFVAL(0));
ClassDB::bind_method(D_METHOD("create_host", "max_peers", "max_channels", "in_bandwidth", "out_bandwidth"), &ENetConnection::create_host, DEFVAL(32), DEFVAL(0), DEFVAL(0), DEFVAL(0));
ClassDB::bind_method(D_METHOD("destroy"), &ENetConnection::destroy);
ClassDB::bind_method(D_METHOD("connect_to_host", "address", "port", "channels", "data"), &ENetConnection::connect_to_host, DEFVAL(0), DEFVAL(0));
ClassDB::bind_method(D_METHOD("service", "timeout"), &ENetConnection::_service, DEFVAL(0));
ClassDB::bind_method(D_METHOD("flush"), &ENetConnection::flush);
ClassDB::bind_method(D_METHOD("bandwidth_limit", "in_bandwidth", "out_bandwidth"), &ENetConnection::bandwidth_limit, DEFVAL(0), DEFVAL(0));
ClassDB::bind_method(D_METHOD("channel_limit", "limit"), &ENetConnection::channel_limit);
ClassDB::bind_method(D_METHOD("broadcast", "channel", "packet", "flags"), &ENetConnection::_broadcast);
ClassDB::bind_method(D_METHOD("compress", "mode"), &ENetConnection::compress);
[NET] Refactor TLS configuration. Use a TLSOptions configuration object which is created via static functions. - "TLSOptions.client": uses the standard CA and common name verification. - "TLSOptions.client_unsafe": uses optional CA verification (i.e. if specified) - "TLSOptions.server": is the standard server configuration (chain + key) This will allow us to expand the TLS configuration options to include e.g. mutual authentication without bloating the classes that uses StreamPeerTLS and PacketPeerDTLS as underlying peers.
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ClassDB::bind_method(D_METHOD("dtls_server_setup", "server_options"), &ENetConnection::dtls_server_setup);
ClassDB::bind_method(D_METHOD("dtls_client_setup", "hostname", "client_options"), &ENetConnection::dtls_client_setup, DEFVAL(Ref<TLSOptions>()));
[Net] Implement lower level ENet wrappers.
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ClassDB::bind_method(D_METHOD("refuse_new_connections", "refuse"), &ENetConnection::refuse_new_connections);
ClassDB::bind_method(D_METHOD("pop_statistic", "statistic"), &ENetConnection::pop_statistic);
ClassDB::bind_method(D_METHOD("get_max_channels"), &ENetConnection::get_max_channels);
ClassDB::bind_method(D_METHOD("get_local_port"), &ENetConnection::get_local_port);
ClassDB::bind_method(D_METHOD("get_peers"), &ENetConnection::_get_peers);
BIND_ENUM_CONSTANT(COMPRESS_NONE);
BIND_ENUM_CONSTANT(COMPRESS_RANGE_CODER);
BIND_ENUM_CONSTANT(COMPRESS_FASTLZ);
BIND_ENUM_CONSTANT(COMPRESS_ZLIB);
BIND_ENUM_CONSTANT(COMPRESS_ZSTD);
BIND_ENUM_CONSTANT(EVENT_ERROR);
BIND_ENUM_CONSTANT(EVENT_NONE);
BIND_ENUM_CONSTANT(EVENT_CONNECT);
BIND_ENUM_CONSTANT(EVENT_DISCONNECT);
BIND_ENUM_CONSTANT(EVENT_RECEIVE);
BIND_ENUM_CONSTANT(HOST_TOTAL_SENT_DATA);
BIND_ENUM_CONSTANT(HOST_TOTAL_SENT_PACKETS);
BIND_ENUM_CONSTANT(HOST_TOTAL_RECEIVED_DATA);
BIND_ENUM_CONSTANT(HOST_TOTAL_RECEIVED_PACKETS);
}
ENetConnection::~ENetConnection() {
if (host) {
destroy();
}
}
size_t ENetConnection::Compressor::enet_compress(void *context, const ENetBuffer *inBuffers, size_t inBufferCount, size_t inLimit, enet_uint8 *outData, size_t outLimit) {
Compressor *compressor = (Compressor *)(context);
if (size_t(compressor->src_mem.size()) < inLimit) {
compressor->src_mem.resize(inLimit);
}
int total = inLimit;
int ofs = 0;
while (total) {
for (size_t i = 0; i < inBufferCount; i++) {
int to_copy = MIN(total, int(inBuffers[i].dataLength));
memcpy(&compressor->src_mem.write[ofs], inBuffers[i].data, to_copy);
ofs += to_copy;
total -= to_copy;
}
}
Compression::Mode mode;
switch (compressor->mode) {
case COMPRESS_FASTLZ: {
mode = Compression::MODE_FASTLZ;
} break;
case COMPRESS_ZLIB: {
mode = Compression::MODE_DEFLATE;
} break;
case COMPRESS_ZSTD: {
mode = Compression::MODE_ZSTD;
} break;
default: {
ERR_FAIL_V_MSG(0, vformat("Invalid ENet compression mode: %d", compressor->mode));
}
}
int req_size = Compression::get_max_compressed_buffer_size(ofs, mode);
if (compressor->dst_mem.size() < req_size) {
compressor->dst_mem.resize(req_size);
}
int ret = Compression::compress(compressor->dst_mem.ptrw(), compressor->src_mem.ptr(), ofs, mode);
if (ret < 0) {
return 0;
}
if (ret > int(outLimit)) {
return 0; // Do not bother
}
memcpy(outData, compressor->dst_mem.ptr(), ret);
return ret;
}
size_t ENetConnection::Compressor::enet_decompress(void *context, const enet_uint8 *inData, size_t inLimit, enet_uint8 *outData, size_t outLimit) {
Compressor *compressor = (Compressor *)(context);
int ret = -1;
switch (compressor->mode) {
case COMPRESS_FASTLZ: {
ret = Compression::decompress(outData, outLimit, inData, inLimit, Compression::MODE_FASTLZ);
} break;
case COMPRESS_ZLIB: {
ret = Compression::decompress(outData, outLimit, inData, inLimit, Compression::MODE_DEFLATE);
} break;
case COMPRESS_ZSTD: {
ret = Compression::decompress(outData, outLimit, inData, inLimit, Compression::MODE_ZSTD);
} break;
default: {
}
}
if (ret < 0) {
return 0;
} else {
return ret;
}
}
void ENetConnection::Compressor::setup(ENetHost *p_host, CompressionMode p_mode) {
ERR_FAIL_COND(!p_host);
switch (p_mode) {
case COMPRESS_NONE: {
enet_host_compress(p_host, nullptr);
} break;
case COMPRESS_RANGE_CODER: {
enet_host_compress_with_range_coder(p_host);
} break;
case COMPRESS_FASTLZ:
case COMPRESS_ZLIB:
case COMPRESS_ZSTD: {
Compressor *compressor = memnew(Compressor(p_mode));
enet_host_compress(p_host, &(compressor->enet_compressor));
} break;
}
}
ENetConnection::Compressor::Compressor(CompressionMode p_mode) {
mode = p_mode;
enet_compressor.context = this;
enet_compressor.compress = enet_compress;
enet_compressor.decompress = enet_decompress;
enet_compressor.destroy = enet_compressor_destroy;
}