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v26.2.0
src/quic/bindingdata.h
298 строк
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James M Snell
quic: complete the internal implementation of QUIC
19 май 2026, 15:08
Не верифицирован
19 май 2026, 15:08
7e6b77b
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#pragma once #if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS #include <base_object.h> #include <env.h> #include <memory_tracker.h> #include <nghttp3/nghttp3.h> #include <ngtcp2/ngtcp2.h> #include <ngtcp2/ngtcp2_crypto.h> #include <node.h> #include <node_mem.h> #include <v8.h> #include <memory> #include <unordered_map> #include "defs.h" namespace node::quic { class Endpoint; class Packet; class Session; class SessionManager; // ============================================================================ // The FunctionTemplates the BindingData will store for us. #define QUIC_CONSTRUCTORS(V) \ V(endpoint) \ V(session) \ V(stream) \ V(udp) // The callbacks are persistent v8::Function references that are set in the // quic::BindingState used to communicate data and events back out to the JS // environment. They are set once from the JavaScript side when the // internalBinding('quic') is first loaded. #define QUIC_JS_CALLBACKS(V) \ V(endpoint_close, EndpointClose) \ V(session_close, SessionClose) \ V(session_early_data_rejected, SessionEarlyDataRejected) \ V(session_goaway, SessionGoaway) \ V(session_datagram, SessionDatagram) \ V(session_datagram_status, SessionDatagramStatus) \ V(session_handshake, SessionHandshake) \ V(session_keylog, SessionKeyLog) \ V(session_qlog, SessionQlog) \ V(session_new, SessionNew) \ V(session_new_token, SessionNewToken) \ V(session_origin, SessionOrigin) \ V(session_path_validation, SessionPathValidation) \ V(session_ticket, SessionTicket) \ V(session_version_negotiation, SessionVersionNegotiation) \ V(stream_blocked, StreamBlocked) \ V(stream_close, StreamClose) \ V(stream_created, StreamCreated) \ V(stream_drain, StreamDrain) \ V(stream_headers, StreamHeaders) \ V(stream_reset, StreamReset) \ V(stream_trailers, StreamTrailers) // The various JS strings the implementation uses. #define QUIC_STRINGS(V) \ V(abandoned, "abandoned") \ V(aborted, "aborted") \ V(acknowledged, "acknowledged") \ V(ack_delay_exponent, "ackDelayExponent") \ V(active_connection_id_limit, "activeConnectionIDLimit") \ V(address_lru_size, "addressLRUSize") \ V(application, "application") \ V(authoritative, "authoritative") \ V(bbr, "bbr") \ V(ca, "ca") \ V(cc_algorithm, "cc") \ V(certs, "certs") \ V(code, "code") \ V(ciphers, "ciphers") \ V(crl, "crl") \ V(cubic, "cubic") \ V(datagram_drop_policy, "datagramDropPolicy") \ V(disable_stateless_reset, "disableStatelessReset") \ V(draining_period_multiplier, "drainingPeriodMultiplier") \ V(enable_connect_protocol, "enableConnectProtocol") \ V(enable_early_data, "enableEarlyData") \ V(enable_datagrams, "enableDatagrams") \ V(enable_tls_trace, "tlsTrace") \ V(endpoint, "Endpoint") \ V(endpoint_udp, "Endpoint::UDP") \ V(failure, "failure") \ V(groups, "groups") \ V(handshake_timeout, "handshakeTimeout") \ V(http3_alpn, &NGHTTP3_ALPN_H3[1]) \ V(keep_alive_timeout, "keepAlive") \ V(initial_max_data, "initialMaxData") \ V(initial_max_stream_data_bidi_local, "initialMaxStreamDataBidiLocal") \ V(initial_max_stream_data_bidi_remote, "initialMaxStreamDataBidiRemote") \ V(initial_max_stream_data_uni, "initialMaxStreamDataUni") \ V(initial_max_streams_bidi, "initialMaxStreamsBidi") \ V(initial_max_streams_uni, "initialMaxStreamsUni") \ V(ipv6_only, "ipv6Only") \ V(keylog, "keylog") \ V(keys, "keys") \ V(lost, "lost") \ V(max_ack_delay, "maxAckDelay") \ V(max_connections_per_host, "maxConnectionsPerHost") \ V(max_connections_total, "maxConnectionsTotal") \ V(max_datagram_frame_size, "maxDatagramFrameSize") \ V(max_datagram_send_attempts, "maxDatagramSendAttempts") \ V(max_field_section_size, "maxFieldSectionSize") \ V(max_header_length, "maxHeaderLength") \ V(max_header_pairs, "maxHeaderPairs") \ V(idle_timeout, "idleTimeout") \ V(max_idle_timeout, "maxIdleTimeout") \ V(max_payload_size, "maxPayloadSize") \ V(max_retries, "maxRetries") \ V(max_stateless_resets, "maxStatelessResetsPerHost") \ V(max_stream_window, "maxStreamWindow") \ V(max_window, "maxWindow") \ V(min_version, "minVersion") \ V(port, "port") \ V(preferred_address_ipv4, "preferredAddressIpv4") \ V(preferred_address_ipv6, "preferredAddressIpv6") \ V(preferred_address_strategy, "preferredAddressPolicy") \ V(alpn, "alpn") \ V(qlog, "qlog") \ V(qpack_blocked_streams, "qpackBlockedStreams") \ V(qpack_encoder_max_dtable_capacity, "qpackEncoderMaxDTableCapacity") \ V(qpack_max_dtable_capacity, "qpackMaxDTableCapacity") \ V(reason, "reason") \ V(reject_unauthorized, "rejectUnauthorized") \ V(reno, "reno") \ V(reset_token_secret, "resetTokenSecret") \ V(retry_token_expiration, "retryTokenExpiration") \ V(rx_loss, "rxDiagnosticLoss") \ V(servername, "servername") \ V(session, "Session") \ V(sni, "sni") \ V(stream, "Stream") \ V(success, "success") \ V(tls_options, "tls") \ V(token, "token") \ V(token_expiration, "tokenExpiration") \ V(token_secret, "tokenSecret") \ V(transport, "transport") \ V(transport_params, "transportParams") \ V(type, "type") \ V(tx_loss, "txDiagnosticLoss") \ V(udp_receive_buffer_size, "udpReceiveBufferSize") \ V(udp_send_buffer_size, "udpSendBufferSize") \ V(udp_ttl, "udpTTL") \ V(unacknowledged_packet_threshold, "unacknowledgedPacketThreshold") \ V(validate_address, "validateAddress") \ V(verify_client, "verifyClient") \ V(verify_private_key, "verifyPrivateKey") \ V(version, "version") // ============================================================================= // The BindingState object holds state for the internalBinding('quic') binding // instance. It is mostly used to hold the persistent constructors, strings, and // callback references used for the rest of the implementation. // // TODO(@jasnell): Make this snapshotable? class BindingData final : public BaseObject, public mem::NgLibMemoryManager<BindingData, ngtcp2_mem> { public: SET_BINDING_ID(quic_binding_data) static void InitPerContext(Realm* realm, v8::Local<v8::Object> target); static void RegisterExternalReferences(ExternalReferenceRegistry* registry); static BindingData& Get(Environment* env); static inline BindingData& Get(Realm* realm) { return Get(realm->env()); } BindingData(Realm* realm, v8::Local<v8::Object> object); ~BindingData() override; DISALLOW_COPY_AND_MOVE(BindingData) void MemoryInfo(MemoryTracker* tracker) const override; SET_MEMORY_INFO_NAME(BindingData) SET_SELF_SIZE(BindingData) // NgLibMemoryManager — the base class provides CheckAllocatedSize, // IncreaseAllocatedSize, DecreaseAllocatedSize, and StopTrackingMemory. // Actual allocations go through the thread-local allocators below. void CheckAllocatedSize(size_t previous_size) const; void IncreaseAllocatedSize(size_t size); void DecreaseAllocatedSize(size_t size); // Thread-local allocators that outlive BindingData destruction. // Both ngtcp2 and nghttp3 store the allocator pointer inside every // object they allocate; some of those objects (e.g., nghttp3 rcbufs // backing V8 external strings) can be freed after BindingData is gone. ngtcp2_mem* ngtcp2_allocator(); nghttp3_mem* nghttp3_allocator(); // Installs the set of JavaScript callback functions that are used to // bridge out to the JS API. JS_METHOD(SetCallbacks); // Lazily-created per-Realm SessionManager. Centralizes CID -> Session // routing so that any endpoint can route packets to any session. SessionManager& session_manager(); std::unordered_map<Endpoint*, BaseObjectPtr<BaseObject>> listening_endpoints; size_t current_ngtcp2_memory_ = 0; // The following set up various storage and accessors for common strings, // construction templates, and callbacks stored on the BindingData. These // are all defined in defs.h #define V(name) \ void set_##name##_constructor_template( \ v8::Local<v8::FunctionTemplate> tmpl); \ v8::Local<v8::FunctionTemplate> name##_constructor_template() const; QUIC_CONSTRUCTORS(V) #undef V #define V(name, _) \ void set_##name##_callback(v8::Local<v8::Function> fn); \ v8::Local<v8::Function> name##_callback() const; QUIC_JS_CALLBACKS(V) #undef V #define V(name, _) v8::Local<v8::String> name##_string() const; QUIC_STRINGS(V) #undef V #define V(name, _) v8::Local<v8::String> on_##name##_string() const; QUIC_JS_CALLBACKS(V) #undef V #define V(name) v8::Global<v8::FunctionTemplate> name##_constructor_template_; QUIC_CONSTRUCTORS(V) #undef V #define V(name, _) v8::Global<v8::Function> name##_callback_; QUIC_JS_CALLBACKS(V) #undef V #define V(name, _) mutable v8::Eternal<v8::String> name##_string_; QUIC_STRINGS(V) #undef V #define V(name, _) mutable v8::Eternal<v8::String> on_##name##_string_; QUIC_JS_CALLBACKS(V) #undef V std::unique_ptr<SessionManager> session_manager_; }; JS_METHOD_IMPL(IllegalConstructor); // The ngtcp2 and nghttp3 callbacks have certain restrictions // that forbid re-entry. We provide the following scopes for // use in those to help protect against it. // These callback scopes are per-session, not per-environment. This ensures // that one session's ngtcp2/nghttp3 callback does not block an unrelated // session from sending packets. A BaseObjectPtr prevents the Session from // being prematurely freed while the scope is alive on the stack. struct NgTcp2CallbackScope final { BaseObjectPtr<Session> session; explicit NgTcp2CallbackScope(Session* session); DISALLOW_COPY_AND_MOVE(NgTcp2CallbackScope) ~NgTcp2CallbackScope(); }; struct NgHttp3CallbackScope final { BaseObjectPtr<Session> session; explicit NgHttp3CallbackScope(Session* session); DISALLOW_COPY_AND_MOVE(NgHttp3CallbackScope) ~NgHttp3CallbackScope(); }; struct CallbackScopeBase { Environment* env; v8::Context::Scope context_scope; v8::TryCatch try_catch; explicit CallbackScopeBase(Environment* env); DISALLOW_COPY_AND_MOVE(CallbackScopeBase) ~CallbackScopeBase(); }; // Maintains a strong reference to BaseObject type ptr to keep it alive during // a MakeCallback during which it might be destroyed. template <typename T> struct CallbackScope final : public CallbackScopeBase { BaseObjectPtr<T> ref; explicit CallbackScope(const T* ptr) : CallbackScopeBase(ptr->env()), ref(ptr) {} DISALLOW_COPY_AND_MOVE(CallbackScope) explicit CallbackScope(T* ptr) : CallbackScopeBase(ptr->env()), ref(ptr) {} }; } // namespace node::quic #endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS