280 lines
7.0 KiB
C++
280 lines
7.0 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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#include "shrpx_connection_handler.h"
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#include <unistd.h>
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#include <cerrno>
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#include <thread>
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#include "shrpx_client_handler.h"
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#include "shrpx_ssl.h"
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#include "shrpx_worker.h"
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#include "shrpx_worker_config.h"
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#include "shrpx_config.h"
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#include "shrpx_http2_session.h"
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#include "shrpx_connect_blocker.h"
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#include "shrpx_downstream_connection.h"
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#include "shrpx_accept_handler.h"
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#include "util.h"
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#include "template.h"
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using namespace nghttp2;
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namespace shrpx {
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namespace {
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void acceptor_disable_cb(struct ev_loop *loop, ev_timer *w, int revent) {
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auto h = static_cast<ConnectionHandler *>(w->data);
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// If we are in graceful shutdown period, we must not enable
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// acceptors again.
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if (worker_config->graceful_shutdown) {
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return;
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}
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h->enable_acceptor();
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}
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} // namespace
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ConnectionHandler::ConnectionHandler(struct ev_loop *loop)
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: loop_(loop), sv_ssl_ctx_(nullptr), cl_ssl_ctx_(nullptr),
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// rate_limit_group_(bufferevent_rate_limit_group_new(
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// evbase, get_config()->worker_rate_limit_cfg)),
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worker_stat_(make_unique<WorkerStat>()), worker_round_robin_cnt_(0) {
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ev_timer_init(&disable_acceptor_timer_, acceptor_disable_cb, 0., 0.);
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disable_acceptor_timer_.data = this;
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}
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ConnectionHandler::~ConnectionHandler() {
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// bufferevent_rate_limit_group_free(rate_limit_group_);
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ev_timer_stop(loop_, &disable_acceptor_timer_);
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}
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void ConnectionHandler::create_ssl_context() {
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sv_ssl_ctx_ = ssl::setup_server_ssl_context();
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cl_ssl_ctx_ = ssl::setup_client_ssl_context();
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}
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void ConnectionHandler::worker_reopen_log_files() {
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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wev.type = REOPEN_LOG;
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for (auto &worker : workers_) {
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worker->send(wev);
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}
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}
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void ConnectionHandler::worker_renew_ticket_keys(
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const std::shared_ptr<TicketKeys> &ticket_keys) {
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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wev.type = RENEW_TICKET_KEYS;
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wev.ticket_keys = ticket_keys;
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for (auto &worker : workers_) {
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worker->send(wev);
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}
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}
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void ConnectionHandler::create_worker_thread(size_t num) {
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#ifndef NOTHREADS
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assert(workers_.size() == 0);
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for (size_t i = 0; i < num; ++i) {
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workers_.push_back(make_unique<Worker>(sv_ssl_ctx_, cl_ssl_ctx_,
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worker_config->cert_tree,
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worker_config->ticket_keys));
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if (LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Created thread #" << workers_.size() - 1;
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}
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}
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#endif // NOTHREADS
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}
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void ConnectionHandler::join_worker() {
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#ifndef NOTHREADS
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int n = 0;
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if (LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Waiting for worker thread to join: n="
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<< workers_.size();
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}
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for (auto &worker : workers_) {
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worker->wait();
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if (LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Thread #" << n << " joined";
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}
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++n;
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}
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#endif // NOTHREADS
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}
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void ConnectionHandler::graceful_shutdown_worker() {
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if (get_config()->num_worker == 1) {
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return;
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}
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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wev.type = GRACEFUL_SHUTDOWN;
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if (LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Sending graceful shutdown signal to worker";
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}
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for (auto &worker : workers_) {
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worker->send(wev);
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}
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}
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int ConnectionHandler::handle_connection(int fd, sockaddr *addr, int addrlen) {
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if (LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Accepted connection. fd=" << fd;
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}
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if (get_config()->num_worker == 1) {
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if (worker_stat_->num_connections >=
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get_config()->worker_frontend_connections) {
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if (LOG_ENABLED(INFO)) {
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LLOG(INFO, this) << "Too many connections >="
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<< get_config()->worker_frontend_connections;
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}
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close(fd);
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return -1;
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}
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auto client = ssl::accept_connection(loop_, sv_ssl_ctx_, fd, addr, addrlen,
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worker_stat_.get(), &dconn_pool_);
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if (!client) {
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LLOG(ERROR, this) << "ClientHandler creation failed";
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close(fd);
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return -1;
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}
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client->set_http2_session(http2session_.get());
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client->set_http1_connect_blocker(http1_connect_blocker_.get());
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return 0;
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}
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size_t idx = worker_round_robin_cnt_ % workers_.size();
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++worker_round_robin_cnt_;
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WorkerEvent wev;
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memset(&wev, 0, sizeof(wev));
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wev.type = NEW_CONNECTION;
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wev.client_fd = fd;
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memcpy(&wev.client_addr, addr, addrlen);
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wev.client_addrlen = addrlen;
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workers_[idx]->send(wev);
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return 0;
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}
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struct ev_loop *ConnectionHandler::get_loop() const {
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return loop_;
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}
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void ConnectionHandler::create_http2_session() {
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http2session_ = make_unique<Http2Session>(loop_, cl_ssl_ctx_);
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}
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void ConnectionHandler::create_http1_connect_blocker() {
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http1_connect_blocker_ = make_unique<ConnectBlocker>(loop_);
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}
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const WorkerStat *ConnectionHandler::get_worker_stat() const {
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return worker_stat_.get();
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}
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void ConnectionHandler::set_acceptor4(std::unique_ptr<AcceptHandler> h) {
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acceptor4_ = std::move(h);
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}
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AcceptHandler *ConnectionHandler::get_acceptor4() const {
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return acceptor4_.get();
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}
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void ConnectionHandler::set_acceptor6(std::unique_ptr<AcceptHandler> h) {
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acceptor6_ = std::move(h);
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}
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AcceptHandler *ConnectionHandler::get_acceptor6() const {
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return acceptor6_.get();
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}
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void ConnectionHandler::enable_acceptor() {
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if (acceptor4_) {
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acceptor4_->enable();
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}
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if (acceptor6_) {
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acceptor6_->enable();
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}
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}
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void ConnectionHandler::disable_acceptor() {
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if (acceptor4_) {
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acceptor4_->disable();
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}
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if (acceptor6_) {
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acceptor6_->disable();
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}
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}
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void ConnectionHandler::disable_acceptor_temporary(ev_tstamp t) {
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if (t == 0. || ev_is_active(&disable_acceptor_timer_)) {
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return;
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}
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disable_acceptor();
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ev_timer_set(&disable_acceptor_timer_, t, 0.);
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ev_timer_start(loop_, &disable_acceptor_timer_);
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}
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void ConnectionHandler::accept_pending_connection() {
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if (acceptor4_) {
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acceptor4_->accept_connection();
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}
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if (acceptor6_) {
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acceptor6_->accept_connection();
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}
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}
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} // namespace shrpx
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