d95794ec8a
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".
500 lines
17 KiB
C++
500 lines
17 KiB
C++
/**************************************************************************/
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/* websocket_multiplayer_peer.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 "websocket_multiplayer_peer.h"
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#include "core/os/os.h"
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WebSocketMultiplayerPeer::WebSocketMultiplayerPeer() {
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peer_config = Ref<WebSocketPeer>(WebSocketPeer::create());
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}
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WebSocketMultiplayerPeer::~WebSocketMultiplayerPeer() {
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_clear();
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}
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Ref<WebSocketPeer> WebSocketMultiplayerPeer::_create_peer() {
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Ref<WebSocketPeer> peer = Ref<WebSocketPeer>(WebSocketPeer::create());
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peer->set_supported_protocols(get_supported_protocols());
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peer->set_handshake_headers(get_handshake_headers());
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peer->set_inbound_buffer_size(get_inbound_buffer_size());
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peer->set_outbound_buffer_size(get_outbound_buffer_size());
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peer->set_max_queued_packets(get_max_queued_packets());
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return peer;
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}
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void WebSocketMultiplayerPeer::_clear() {
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connection_status = CONNECTION_DISCONNECTED;
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unique_id = 0;
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peers_map.clear();
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use_tls = false;
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tcp_server.unref();
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pending_peers.clear();
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tls_certificate.unref();
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tls_key.unref();
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if (current_packet.data != nullptr) {
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memfree(current_packet.data);
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current_packet.data = nullptr;
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}
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for (Packet &E : incoming_packets) {
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memfree(E.data);
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E.data = nullptr;
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}
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incoming_packets.clear();
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}
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void WebSocketMultiplayerPeer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("create_client", "url", "verify_tls", "tls_certificate"), &WebSocketMultiplayerPeer::create_client, DEFVAL(true), DEFVAL(Ref<X509Certificate>()));
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ClassDB::bind_method(D_METHOD("create_server", "port", "bind_address", "tls_key", "tls_certificate"), &WebSocketMultiplayerPeer::create_server, DEFVAL("*"), DEFVAL(Ref<CryptoKey>()), DEFVAL(Ref<X509Certificate>()));
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ClassDB::bind_method(D_METHOD("get_peer", "peer_id"), &WebSocketMultiplayerPeer::get_peer);
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ClassDB::bind_method(D_METHOD("get_peer_address", "id"), &WebSocketMultiplayerPeer::get_peer_address);
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ClassDB::bind_method(D_METHOD("get_peer_port", "id"), &WebSocketMultiplayerPeer::get_peer_port);
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ClassDB::bind_method(D_METHOD("get_supported_protocols"), &WebSocketMultiplayerPeer::get_supported_protocols);
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ClassDB::bind_method(D_METHOD("set_supported_protocols", "protocols"), &WebSocketMultiplayerPeer::set_supported_protocols);
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ClassDB::bind_method(D_METHOD("get_handshake_headers"), &WebSocketMultiplayerPeer::get_handshake_headers);
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ClassDB::bind_method(D_METHOD("set_handshake_headers", "protocols"), &WebSocketMultiplayerPeer::set_handshake_headers);
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ClassDB::bind_method(D_METHOD("get_inbound_buffer_size"), &WebSocketMultiplayerPeer::get_inbound_buffer_size);
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ClassDB::bind_method(D_METHOD("set_inbound_buffer_size", "buffer_size"), &WebSocketMultiplayerPeer::set_inbound_buffer_size);
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ClassDB::bind_method(D_METHOD("get_outbound_buffer_size"), &WebSocketMultiplayerPeer::get_outbound_buffer_size);
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ClassDB::bind_method(D_METHOD("set_outbound_buffer_size", "buffer_size"), &WebSocketMultiplayerPeer::set_outbound_buffer_size);
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ClassDB::bind_method(D_METHOD("get_handshake_timeout"), &WebSocketMultiplayerPeer::get_handshake_timeout);
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ClassDB::bind_method(D_METHOD("set_handshake_timeout", "timeout"), &WebSocketMultiplayerPeer::set_handshake_timeout);
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ClassDB::bind_method(D_METHOD("set_max_queued_packets", "max_queued_packets"), &WebSocketMultiplayerPeer::set_max_queued_packets);
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ClassDB::bind_method(D_METHOD("get_max_queued_packets"), &WebSocketMultiplayerPeer::get_max_queued_packets);
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ADD_PROPERTY(PropertyInfo(Variant::PACKED_STRING_ARRAY, "supported_protocols"), "set_supported_protocols", "get_supported_protocols");
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ADD_PROPERTY(PropertyInfo(Variant::PACKED_STRING_ARRAY, "handshake_headers"), "set_handshake_headers", "get_handshake_headers");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "inbound_buffer_size"), "set_inbound_buffer_size", "get_inbound_buffer_size");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "outbound_buffer_size"), "set_outbound_buffer_size", "get_outbound_buffer_size");
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "handshake_timeout"), "set_handshake_timeout", "get_handshake_timeout");
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ADD_PROPERTY(PropertyInfo(Variant::INT, "max_queued_packets"), "set_max_queued_packets", "get_max_queued_packets");
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}
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//
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// PacketPeer
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//
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int WebSocketMultiplayerPeer::get_available_packet_count() const {
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return incoming_packets.size();
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}
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Error WebSocketMultiplayerPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
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ERR_FAIL_COND_V(get_connection_status() != CONNECTION_CONNECTED, ERR_UNCONFIGURED);
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r_buffer_size = 0;
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if (current_packet.data != nullptr) {
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memfree(current_packet.data);
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current_packet.data = nullptr;
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}
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ERR_FAIL_COND_V(incoming_packets.size() == 0, ERR_UNAVAILABLE);
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current_packet = incoming_packets.front()->get();
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incoming_packets.pop_front();
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*r_buffer = current_packet.data;
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r_buffer_size = current_packet.size;
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return OK;
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}
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Error WebSocketMultiplayerPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
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ERR_FAIL_COND_V(get_connection_status() != CONNECTION_CONNECTED, ERR_UNCONFIGURED);
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if (is_server()) {
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if (target_peer > 0) {
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ERR_FAIL_COND_V_MSG(!peers_map.has(target_peer), ERR_INVALID_PARAMETER, "Peer not found: " + itos(target_peer));
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get_peer(target_peer)->put_packet(p_buffer, p_buffer_size);
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} else {
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for (KeyValue<int, Ref<WebSocketPeer>> &E : peers_map) {
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if (target_peer && -target_peer == E.key) {
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continue; // Excluded.
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}
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E.value->put_packet(p_buffer, p_buffer_size);
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}
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}
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return OK;
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} else {
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return get_peer(1)->put_packet(p_buffer, p_buffer_size);
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}
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}
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//
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// MultiplayerPeer
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//
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void WebSocketMultiplayerPeer::set_target_peer(int p_target_peer) {
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target_peer = p_target_peer;
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}
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int WebSocketMultiplayerPeer::get_packet_peer() const {
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ERR_FAIL_COND_V(incoming_packets.size() == 0, 1);
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return incoming_packets.front()->get().source;
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}
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int WebSocketMultiplayerPeer::get_unique_id() const {
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return unique_id;
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}
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int WebSocketMultiplayerPeer::get_max_packet_size() const {
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return get_outbound_buffer_size() - PROTO_SIZE;
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}
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Error WebSocketMultiplayerPeer::create_server(int p_port, IPAddress p_bind_ip, Ref<CryptoKey> p_tls_key, Ref<X509Certificate> p_tls_certificate) {
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ERR_FAIL_COND_V(get_connection_status() != CONNECTION_DISCONNECTED, ERR_ALREADY_IN_USE);
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_clear();
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tcp_server.instantiate();
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Error err = tcp_server->listen(p_port, p_bind_ip);
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if (err != OK) {
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tcp_server.unref();
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return err;
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}
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unique_id = 1;
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connection_status = CONNECTION_CONNECTED;
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// TLS config
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tls_key = p_tls_key;
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tls_certificate = p_tls_certificate;
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if (tls_key.is_valid() && tls_certificate.is_valid()) {
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use_tls = true;
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}
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return OK;
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}
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Error WebSocketMultiplayerPeer::create_client(const String &p_url, bool p_verify_tls, Ref<X509Certificate> p_tls_certificate) {
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ERR_FAIL_COND_V(get_connection_status() != CONNECTION_DISCONNECTED, ERR_ALREADY_IN_USE);
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_clear();
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Ref<WebSocketPeer> peer = _create_peer();
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Error err = peer->connect_to_url(p_url, p_verify_tls, p_tls_certificate);
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if (err != OK) {
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return err;
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}
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PendingPeer pending;
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pending.time = OS::get_singleton()->get_ticks_msec();
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pending_peers[1] = pending;
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peers_map[1] = peer;
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connection_status = CONNECTION_CONNECTING;
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return OK;
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}
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bool WebSocketMultiplayerPeer::is_server() const {
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return tcp_server.is_valid();
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}
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void WebSocketMultiplayerPeer::_poll_client() {
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ERR_FAIL_COND(connection_status == CONNECTION_DISCONNECTED); // Bug.
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ERR_FAIL_COND(!peers_map.has(1) || peers_map[1].is_null()); // Bug.
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Ref<WebSocketPeer> peer = peers_map[1];
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peer->poll(); // Update state and fetch packets.
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WebSocketPeer::State ready_state = peer->get_ready_state();
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if (ready_state == WebSocketPeer::STATE_OPEN) {
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if (connection_status == CONNECTION_CONNECTING) {
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if (peer->get_available_packet_count() > 0) {
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const uint8_t *in_buffer;
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int size = 0;
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Error err = peer->get_packet(&in_buffer, size);
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if (err != OK || size != 4) {
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peer->close(); // Will cause connection error on next poll.
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ERR_FAIL_MSG("Invalid ID received from server");
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}
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unique_id = *((int32_t *)in_buffer);
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if (unique_id < 2) {
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peer->close(); // Will cause connection error on next poll.
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ERR_FAIL_MSG("Invalid ID received from server");
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}
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connection_status = CONNECTION_CONNECTED;
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emit_signal("peer_connected", 1);
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emit_signal("connection_succeeded");
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} else {
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return; // Still waiting for an ID.
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}
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}
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int pkts = peer->get_available_packet_count();
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while (pkts > 0 && peer->get_ready_state() == WebSocketPeer::STATE_OPEN) {
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const uint8_t *in_buffer;
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int size = 0;
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Error err = peer->get_packet(&in_buffer, size);
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ERR_FAIL_COND(err != OK);
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ERR_FAIL_COND(size <= 0);
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Packet packet;
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packet.data = (uint8_t *)memalloc(size);
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memcpy(packet.data, in_buffer, size);
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packet.size = size;
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packet.source = 1;
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incoming_packets.push_back(packet);
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pkts--;
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}
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} else if (peer->get_ready_state() == WebSocketPeer::STATE_CLOSED) {
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if (connection_status == CONNECTION_CONNECTED) {
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emit_signal(SNAME("peer_disconnected"), 1);
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}
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_clear();
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return;
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}
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if (connection_status == CONNECTION_CONNECTING) {
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// Still connecting
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ERR_FAIL_COND(!pending_peers.has(1)); // Bug.
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if (OS::get_singleton()->get_ticks_msec() - pending_peers[1].time > handshake_timeout) {
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print_verbose(vformat("WebSocket handshake timed out after %.3f seconds.", handshake_timeout * 0.001));
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_clear();
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return;
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}
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}
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}
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void WebSocketMultiplayerPeer::_poll_server() {
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ERR_FAIL_COND(connection_status != CONNECTION_CONNECTED); // Bug.
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ERR_FAIL_COND(tcp_server.is_null() || !tcp_server->is_listening()); // Bug.
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// Accept new connections.
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if (!is_refusing_new_connections() && tcp_server->is_connection_available()) {
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PendingPeer peer;
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peer.time = OS::get_singleton()->get_ticks_msec();
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peer.tcp = tcp_server->take_connection();
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peer.connection = peer.tcp;
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pending_peers[generate_unique_id()] = peer;
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}
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// Process pending peers.
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HashSet<int> to_remove;
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for (KeyValue<int, PendingPeer> &E : pending_peers) {
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PendingPeer &peer = E.value;
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int id = E.key;
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if (OS::get_singleton()->get_ticks_msec() - peer.time > handshake_timeout) {
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print_verbose(vformat("WebSocket handshake timed out after %.3f seconds.", handshake_timeout * 0.001));
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to_remove.insert(id);
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continue;
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}
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if (peer.ws.is_valid()) {
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peer.ws->poll();
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WebSocketPeer::State state = peer.ws->get_ready_state();
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if (state == WebSocketPeer::STATE_OPEN) {
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// Connected.
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to_remove.insert(id);
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if (is_refusing_new_connections()) {
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// The user does not want new connections, dropping it.
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continue;
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}
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int32_t peer_id = id;
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Error err = peer.ws->put_packet((const uint8_t *)&peer_id, sizeof(peer_id));
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if (err == OK) {
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peers_map[id] = peer.ws;
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emit_signal("peer_connected", id);
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} else {
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ERR_PRINT("Failed to send ID to newly connected peer.");
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}
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continue;
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} else if (state == WebSocketPeer::STATE_CONNECTING) {
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continue; // Still connecting.
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}
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to_remove.insert(id); // Error.
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continue;
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}
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if (peer.tcp->get_status() != StreamPeerTCP::STATUS_CONNECTED) {
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to_remove.insert(id); // Error.
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continue;
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}
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if (!use_tls) {
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peer.ws = _create_peer();
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peer.ws->accept_stream(peer.tcp);
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continue;
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} else {
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if (peer.connection == peer.tcp) {
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Ref<StreamPeerTLS> tls = Ref<StreamPeerTLS>(StreamPeerTLS::create());
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Error err = tls->accept_stream(peer.tcp, tls_key, tls_certificate);
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if (err != OK) {
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to_remove.insert(id);
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continue;
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}
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}
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Ref<StreamPeerTLS> tls = static_cast<Ref<StreamPeerTLS>>(peer.connection);
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tls->poll();
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if (tls->get_status() == StreamPeerTLS::STATUS_CONNECTED) {
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peer.ws = _create_peer();
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peer.ws->accept_stream(peer.connection);
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continue;
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} else if (tls->get_status() == StreamPeerTLS::STATUS_HANDSHAKING) {
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// Still connecting.
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continue;
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} else {
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// Error
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to_remove.insert(id);
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}
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}
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}
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// Remove disconnected pending peers.
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for (const int &pid : to_remove) {
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pending_peers.erase(pid);
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}
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to_remove.clear();
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// Process connected peers.
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for (KeyValue<int, Ref<WebSocketPeer>> &E : peers_map) {
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Ref<WebSocketPeer> ws = E.value;
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int id = E.key;
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ws->poll();
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if (ws->get_ready_state() != WebSocketPeer::STATE_OPEN) {
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to_remove.insert(id); // Disconnected.
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continue;
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}
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// Fetch packets
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int pkts = ws->get_available_packet_count();
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while (pkts > 0 && ws->get_ready_state() == WebSocketPeer::STATE_OPEN) {
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const uint8_t *in_buffer;
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int size = 0;
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Error err = ws->get_packet(&in_buffer, size);
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if (err != OK || size <= 0) {
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break;
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}
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Packet packet;
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packet.data = (uint8_t *)memalloc(size);
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memcpy(packet.data, in_buffer, size);
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packet.size = size;
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packet.source = E.key;
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incoming_packets.push_back(packet);
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pkts--;
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}
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}
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// Remove disconnected peers.
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for (const int &pid : to_remove) {
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emit_signal(SNAME("peer_disconnected"), pid);
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peers_map.erase(pid);
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}
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}
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void WebSocketMultiplayerPeer::poll() {
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if (connection_status == CONNECTION_DISCONNECTED) {
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return;
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}
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if (is_server()) {
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_poll_server();
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} else {
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_poll_client();
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}
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}
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MultiplayerPeer::ConnectionStatus WebSocketMultiplayerPeer::get_connection_status() const {
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return connection_status;
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}
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Ref<WebSocketPeer> WebSocketMultiplayerPeer::get_peer(int p_id) const {
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ERR_FAIL_COND_V(!peers_map.has(p_id), Ref<WebSocketPeer>());
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return peers_map[p_id];
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}
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void WebSocketMultiplayerPeer::set_supported_protocols(const Vector<String> &p_protocols) {
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peer_config->set_supported_protocols(p_protocols);
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}
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Vector<String> WebSocketMultiplayerPeer::get_supported_protocols() const {
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return peer_config->get_supported_protocols();
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}
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void WebSocketMultiplayerPeer::set_handshake_headers(const Vector<String> &p_headers) {
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peer_config->set_handshake_headers(p_headers);
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}
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Vector<String> WebSocketMultiplayerPeer::get_handshake_headers() const {
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return peer_config->get_handshake_headers();
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}
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void WebSocketMultiplayerPeer::set_outbound_buffer_size(int p_buffer_size) {
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peer_config->set_outbound_buffer_size(p_buffer_size);
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}
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int WebSocketMultiplayerPeer::get_outbound_buffer_size() const {
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return peer_config->get_outbound_buffer_size();
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}
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void WebSocketMultiplayerPeer::set_inbound_buffer_size(int p_buffer_size) {
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peer_config->set_inbound_buffer_size(p_buffer_size);
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}
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|
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int WebSocketMultiplayerPeer::get_inbound_buffer_size() const {
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|
return peer_config->get_inbound_buffer_size();
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|
}
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|
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void WebSocketMultiplayerPeer::set_max_queued_packets(int p_max_queued_packets) {
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|
peer_config->set_max_queued_packets(p_max_queued_packets);
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}
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|
|
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int WebSocketMultiplayerPeer::get_max_queued_packets() const {
|
|
return peer_config->get_max_queued_packets();
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|
}
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|
|
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float WebSocketMultiplayerPeer::get_handshake_timeout() const {
|
|
return handshake_timeout / 1000.0;
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|
}
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|
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void WebSocketMultiplayerPeer::set_handshake_timeout(float p_timeout) {
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|
ERR_FAIL_COND(p_timeout <= 0.0);
|
|
handshake_timeout = p_timeout * 1000;
|
|
}
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|
|
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IPAddress WebSocketMultiplayerPeer::get_peer_address(int p_peer_id) const {
|
|
ERR_FAIL_COND_V(!peers_map.has(p_peer_id), IPAddress());
|
|
return peers_map[p_peer_id]->get_connected_host();
|
|
}
|
|
|
|
int WebSocketMultiplayerPeer::get_peer_port(int p_peer_id) const {
|
|
ERR_FAIL_COND_V(!peers_map.has(p_peer_id), 0);
|
|
return peers_map[p_peer_id]->get_connected_port();
|
|
}
|
|
|
|
void WebSocketMultiplayerPeer::disconnect_peer(int p_peer_id, bool p_force) {
|
|
ERR_FAIL_COND(!peers_map.has(p_peer_id));
|
|
peers_map[p_peer_id]->close();
|
|
if (p_force) {
|
|
peers_map.erase(p_peer_id);
|
|
if (!is_server()) {
|
|
_clear();
|
|
}
|
|
}
|
|
}
|
|
|
|
void WebSocketMultiplayerPeer::close() {
|
|
_clear();
|
|
}
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