nghttp2/src/shrpx_connection_handler.cc

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