7536d15fe3
MultiplayerPeer changes: - Adds is_server_relay_supported virtual method Informs the upper MultiplayerAPI layer if it can signal peers connected to the server to other clients, and perform packet relaying among them. - Adds get_packet_channel and get_packet_mode virtual methods Allows the MultiplayerAPI to retrieve the channel and transfer modes to use when relaying the last received packet. SceneMultiplayerPeer changes: - Implement peer signaling and packet relaying when the MultiplayerPeer advertise they are supported. ENet, WebRTC, WebSocket changes: - Removed custom code for relaying from WebSocket and ENet, and let it be handled by the upper layer. - Update WebRTC to split create_client, create_server, and create_mesh, with the latter behaving like the old initialize with "server_compatibility = false", and the first two supporting the upper layer relaying protocol.
498 lines
18 KiB
C++
498 lines
18 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) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 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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#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("close"), &WebSocketMultiplayerPeer::close);
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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("disconnect_peer", "id", "code", "reason"), &WebSocketMultiplayerPeer::disconnect_peer, DEFVAL(1000), DEFVAL(""));
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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("server_disconnected"));
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} else {
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emit_signal(SNAME("connection_failed"));
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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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emit_signal(SNAME("connection_failed"));
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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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|
|
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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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|
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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) {
|
|
peer_config->set_outbound_buffer_size(p_buffer_size);
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|
}
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|
|
|
int WebSocketMultiplayerPeer::get_outbound_buffer_size() const {
|
|
return peer_config->get_outbound_buffer_size();
|
|
}
|
|
|
|
void WebSocketMultiplayerPeer::set_inbound_buffer_size(int p_buffer_size) {
|
|
peer_config->set_inbound_buffer_size(p_buffer_size);
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|
}
|
|
|
|
int WebSocketMultiplayerPeer::get_inbound_buffer_size() const {
|
|
return peer_config->get_inbound_buffer_size();
|
|
}
|
|
|
|
void WebSocketMultiplayerPeer::set_max_queued_packets(int p_max_queued_packets) {
|
|
peer_config->set_max_queued_packets(p_max_queued_packets);
|
|
}
|
|
|
|
int WebSocketMultiplayerPeer::get_max_queued_packets() const {
|
|
return peer_config->get_max_queued_packets();
|
|
}
|
|
|
|
float WebSocketMultiplayerPeer::get_handshake_timeout() const {
|
|
return handshake_timeout / 1000.0;
|
|
}
|
|
|
|
void WebSocketMultiplayerPeer::set_handshake_timeout(float p_timeout) {
|
|
ERR_FAIL_COND(p_timeout <= 0.0);
|
|
handshake_timeout = p_timeout * 1000;
|
|
}
|
|
|
|
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, int p_code, String p_reason) {
|
|
ERR_FAIL_COND(!peers_map.has(p_peer_id));
|
|
peers_map[p_peer_id]->close(p_code, p_reason);
|
|
}
|
|
|
|
void WebSocketMultiplayerPeer::close() {
|
|
_clear();
|
|
}
|