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Diffstat (limited to 'src/shrpx_connection_handler.h')
| -rw-r--r-- | src/shrpx_connection_handler.h | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/src/shrpx_connection_handler.h b/src/shrpx_connection_handler.h new file mode 100644 index 0000000..e89b6d5 --- /dev/null +++ b/src/shrpx_connection_handler.h @@ -0,0 +1,322 @@ +/* + * nghttp2 - HTTP/2 C Library + * + * Copyright (c) 2012 Tatsuhiro Tsujikawa + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ +#ifndef SHRPX_CONNECTION_HANDLER_H +#define SHRPX_CONNECTION_HANDLER_H + +#include "shrpx.h" + +#include <sys/types.h> +#ifdef HAVE_SYS_SOCKET_H +# include <sys/socket.h> +#endif // HAVE_SYS_SOCKET_H + +#include <mutex> +#include <memory> +#include <vector> +#include <random> +#ifndef NOTHREADS +# include <future> +#endif // NOTHREADS + +#ifdef HAVE_LIBBPF +# include <bpf/libbpf.h> +#endif // HAVE_LIBBPF + +#include <openssl/ssl.h> + +#include <ev.h> + +#ifdef HAVE_NEVERBLEED +# include <neverbleed.h> +#endif // HAVE_NEVERBLEED + +#include "shrpx_downstream_connection_pool.h" +#include "shrpx_config.h" +#include "shrpx_exec.h" + +namespace shrpx { + +class Http2Session; +class ConnectBlocker; +class AcceptHandler; +class Worker; +struct WorkerStat; +struct TicketKeys; +class MemcachedDispatcher; +struct UpstreamAddr; + +namespace tls { + +class CertLookupTree; + +} // namespace tls + +struct OCSPUpdateContext { + // ocsp response buffer + std::vector<uint8_t> resp; + // Process running fetch-ocsp-response script + Process proc; + // index to ConnectionHandler::all_ssl_ctx_, which points to next + // SSL_CTX to update ocsp response cache. + size_t next; + ev_child chldev; + ev_io rev; + // errno encountered while processing response + int error; +}; + +// SerialEvent is an event sent from Worker thread. +enum class SerialEventType { + NONE, + REPLACE_DOWNSTREAM, +}; + +struct SerialEvent { + // ctor for event uses DownstreamConfig + SerialEvent(SerialEventType type, + const std::shared_ptr<DownstreamConfig> &downstreamconf) + : type(type), downstreamconf(downstreamconf) {} + + SerialEventType type; + std::shared_ptr<DownstreamConfig> downstreamconf; +}; + +#ifdef ENABLE_HTTP3 +# ifdef HAVE_LIBBPF +struct BPFRef { + bpf_object *obj; + int reuseport_array; + int cid_prefix_map; +}; +# endif // HAVE_LIBBPF + +// QUIC IPC message type. +enum class QUICIPCType { + NONE, + // Send forwarded QUIC UDP datagram and its metadata. + DGRAM_FORWARD, +}; + +// WorkerProcesses which are in graceful shutdown period. +struct QUICLingeringWorkerProcess { + QUICLingeringWorkerProcess( + std::vector<std::array<uint8_t, SHRPX_QUIC_CID_PREFIXLEN>> cid_prefixes, + int quic_ipc_fd) + : cid_prefixes{std::move(cid_prefixes)}, quic_ipc_fd{quic_ipc_fd} {} + + std::vector<std::array<uint8_t, SHRPX_QUIC_CID_PREFIXLEN>> cid_prefixes; + // Socket to send QUIC IPC message to this worker process. + int quic_ipc_fd; +}; +#endif // ENABLE_HTTP3 + +class ConnectionHandler { +public: + ConnectionHandler(struct ev_loop *loop, std::mt19937 &gen); + ~ConnectionHandler(); + int handle_connection(int fd, sockaddr *addr, int addrlen, + const UpstreamAddr *faddr); + // Creates Worker object for single threaded configuration. + int create_single_worker(); + // Creates |num| Worker objects for multi threaded configuration. + // The |num| must be strictly more than 1. + int create_worker_thread(size_t num); + void + set_ticket_keys_to_worker(const std::shared_ptr<TicketKeys> &ticket_keys); + void worker_reopen_log_files(); + void set_ticket_keys(std::shared_ptr<TicketKeys> ticket_keys); + const std::shared_ptr<TicketKeys> &get_ticket_keys() const; + struct ev_loop *get_loop() const; + Worker *get_single_worker() const; + void add_acceptor(std::unique_ptr<AcceptHandler> h); + void delete_acceptor(); + void enable_acceptor(); + void disable_acceptor(); + void sleep_acceptor(ev_tstamp t); + void accept_pending_connection(); + void graceful_shutdown_worker(); + void set_graceful_shutdown(bool f); + bool get_graceful_shutdown() const; + void join_worker(); + + // Cancels ocsp update process + void cancel_ocsp_update(); + // Starts ocsp update for certificate |cert_file|. + int start_ocsp_update(const char *cert_file); + // Reads incoming data from ocsp update process + void read_ocsp_chunk(); + // Handles the completion of one ocsp update + void handle_ocsp_complete(); + // Resets ocsp_; + void reset_ocsp(); + // Proceeds to the next certificate's ocsp update. If all + // certificates' ocsp update has been done, schedule next ocsp + // update. + void proceed_next_cert_ocsp(); + + void set_tls_ticket_key_memcached_dispatcher( + std::unique_ptr<MemcachedDispatcher> dispatcher); + + MemcachedDispatcher *get_tls_ticket_key_memcached_dispatcher() const; + void on_tls_ticket_key_network_error(ev_timer *w); + void on_tls_ticket_key_not_found(ev_timer *w); + void + on_tls_ticket_key_get_success(const std::shared_ptr<TicketKeys> &ticket_keys, + ev_timer *w); + void schedule_next_tls_ticket_key_memcached_get(ev_timer *w); + SSL_CTX *create_tls_ticket_key_memcached_ssl_ctx(); + // Returns the SSL_CTX at all_ssl_ctx_[idx]. This does not perform + // array bound checking. + SSL_CTX *get_ssl_ctx(size_t idx) const; + + const std::vector<SSL_CTX *> &get_indexed_ssl_ctx(size_t idx) const; +#ifdef ENABLE_HTTP3 + const std::vector<SSL_CTX *> &get_quic_indexed_ssl_ctx(size_t idx) const; + + int forward_quic_packet(const UpstreamAddr *faddr, const Address &remote_addr, + const Address &local_addr, const ngtcp2_pkt_info &pi, + const uint8_t *cid_prefix, const uint8_t *data, + size_t datalen); + + void set_quic_keying_materials(std::shared_ptr<QUICKeyingMaterials> qkms); + const std::shared_ptr<QUICKeyingMaterials> &get_quic_keying_materials() const; + + void set_cid_prefixes( + const std::vector<std::array<uint8_t, SHRPX_QUIC_CID_PREFIXLEN>> + &cid_prefixes); + + void set_quic_lingering_worker_processes( + const std::vector<QUICLingeringWorkerProcess> &quic_lwps); + + // Return matching QUICLingeringWorkerProcess which has a CID prefix + // such that |dcid| starts with it. If no such + // QUICLingeringWorkerProcess, it returns nullptr. + QUICLingeringWorkerProcess * + match_quic_lingering_worker_process_cid_prefix(const uint8_t *dcid, + size_t dcidlen); + + int forward_quic_packet_to_lingering_worker_process( + QUICLingeringWorkerProcess *quic_lwp, const Address &remote_addr, + const Address &local_addr, const ngtcp2_pkt_info &pi, const uint8_t *data, + size_t datalen); + + void set_quic_ipc_fd(int fd); + + int quic_ipc_read(); + +# ifdef HAVE_LIBBPF + std::vector<BPFRef> &get_quic_bpf_refs(); + void unload_bpf_objects(); +# endif // HAVE_LIBBPF +#endif // ENABLE_HTTP3 + +#ifdef HAVE_NEVERBLEED + void set_neverbleed(neverbleed_t *nb); +#endif // HAVE_NEVERBLEED + + // Send SerialEvent SerialEventType::REPLACE_DOWNSTREAM to this + // object. + void send_replace_downstream( + const std::shared_ptr<DownstreamConfig> &downstreamconf); + // Internal function to send |ev| to this object. + void send_serial_event(SerialEvent ev); + // Handles SerialEvents received. + void handle_serial_event(); + // Sends WorkerEvent to make them replace downstream. + void + worker_replace_downstream(std::shared_ptr<DownstreamConfig> downstreamconf); + + void set_enable_acceptor_on_ocsp_completion(bool f); + +private: + // Stores all SSL_CTX objects. + std::vector<SSL_CTX *> all_ssl_ctx_; + // Stores all SSL_CTX objects in a way that its index is stored in + // cert_tree. The SSL_CTXs stored in the same index share the same + // hostname, but could have different signature algorithm. The + // selection among them are performed by hostname presented by SNI, + // and signature algorithm presented by client. + std::vector<std::vector<SSL_CTX *>> indexed_ssl_ctx_; +#ifdef ENABLE_HTTP3 + std::vector<std::array<uint8_t, SHRPX_QUIC_CID_PREFIXLEN>> cid_prefixes_; + std::vector<std::array<uint8_t, SHRPX_QUIC_CID_PREFIXLEN>> + lingering_cid_prefixes_; + int quic_ipc_fd_; + std::vector<QUICLingeringWorkerProcess> quic_lingering_worker_processes_; +# ifdef HAVE_LIBBPF + std::vector<BPFRef> quic_bpf_refs_; +# endif // HAVE_LIBBPF + std::shared_ptr<QUICKeyingMaterials> quic_keying_materials_; + std::vector<SSL_CTX *> quic_all_ssl_ctx_; + std::vector<std::vector<SSL_CTX *>> quic_indexed_ssl_ctx_; +#endif // ENABLE_HTTP3 + OCSPUpdateContext ocsp_; + std::mt19937 &gen_; + // ev_loop for each worker + std::vector<struct ev_loop *> worker_loops_; + // Worker instances when multi threaded mode (-nN, N >= 2) is used. + // If at least one frontend enables API request, we allocate 1 + // additional worker dedicated to API request . + std::vector<std::unique_ptr<Worker>> workers_; + // mutex for serial event resive buffer handling + std::mutex serial_event_mu_; + // SerialEvent receive buffer + std::vector<SerialEvent> serial_events_; + // Worker instance used when single threaded mode (-n1) is used. + // Otherwise, nullptr and workers_ has instances of Worker instead. + std::unique_ptr<Worker> single_worker_; + std::unique_ptr<tls::CertLookupTree> cert_tree_; +#ifdef ENABLE_HTTP3 + std::unique_ptr<tls::CertLookupTree> quic_cert_tree_; +#endif // ENABLE_HTTP3 + std::unique_ptr<MemcachedDispatcher> tls_ticket_key_memcached_dispatcher_; + // Current TLS session ticket keys. Note that TLS connection does + // not refer to this field directly. They use TicketKeys object in + // Worker object. + std::shared_ptr<TicketKeys> ticket_keys_; + struct ev_loop *loop_; + std::vector<std::unique_ptr<AcceptHandler>> acceptors_; +#ifdef HAVE_NEVERBLEED + neverbleed_t *nb_; +#endif // HAVE_NEVERBLEED + ev_timer disable_acceptor_timer_; + ev_timer ocsp_timer_; + ev_async thread_join_asyncev_; + ev_async serial_event_asyncev_; +#ifndef NOTHREADS + std::future<void> thread_join_fut_; +#endif // NOTHREADS + size_t tls_ticket_key_memcached_get_retry_count_; + size_t tls_ticket_key_memcached_fail_count_; + unsigned int worker_round_robin_cnt_; + bool graceful_shutdown_; + // true if acceptors should be enabled after the initial ocsp update + // has finished. + bool enable_acceptor_on_ocsp_completion_; +}; + +} // namespace shrpx + +#endif // SHRPX_CONNECTION_HANDLER_H |