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