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|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kNetwork
#include "mongo/platform/basic.h"
#include "mongo/transport/transport_layer_asio.h"
#include <asio.hpp>
#include <asio/system_timer.hpp>
#include <boost/algorithm/string.hpp>
#include "mongo/config.h"
#include "mongo/base/system_error.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
#include "mongo/transport/asio_utils.h"
#include "mongo/transport/service_entry_point.h"
#include "mongo/util/log.h"
#include "mongo/util/net/hostandport.h"
#include "mongo/util/net/sockaddr.h"
#include "mongo/util/net/ssl_manager.h"
#include "mongo/util/net/ssl_options.h"
#ifdef MONGO_CONFIG_SSL
#include "mongo/util/net/ssl.hpp"
#endif
// session_asio.h has some header dependencies that require it to be the last header.
#ifdef __linux__
#include "mongo/transport/baton_asio_linux.h"
#endif
#include "mongo/transport/session_asio.h"
namespace mongo {
namespace transport {
MONGO_FAIL_POINT_DEFINE(transportLayerASIOasyncConnectTimesOut);
class ASIOReactorTimer final : public ReactorTimer {
public:
explicit ASIOReactorTimer(asio::io_context& ctx)
: _timer(std::make_shared<asio::system_timer>(ctx)) {}
~ASIOReactorTimer() {
// The underlying timer won't get destroyed until the last promise from _asyncWait
// has been filled, so cancel the timer so our promises get fulfilled
cancel();
}
void cancel(const BatonHandle& baton = nullptr) override {
// If we have a baton try to cancel that.
if (baton && baton->cancelTimer(*this)) {
LOG(2) << "Canceled via baton, skipping asio cancel.";
return;
}
// Otherwise there could be a previous timer that was scheduled normally.
_timer->cancel();
}
Future<void> waitUntil(Date_t expiration, const BatonHandle& baton = nullptr) override {
if (baton) {
return _asyncWait([&] { return baton->waitUntil(*this, expiration); }, baton);
} else {
return _asyncWait([&] { _timer->expires_at(expiration.toSystemTimePoint()); });
}
}
private:
template <typename ArmTimerCb>
Future<void> _asyncWait(ArmTimerCb&& armTimer) {
try {
cancel();
armTimer();
return _timer->async_wait(UseFuture{}).tapError([timer = _timer](const Status& status) {
if (status != ErrorCodes::CallbackCanceled) {
LOG(2) << "Timer received error: " << status;
}
});
} catch (asio::system_error& ex) {
return futurize(ex.code());
}
}
template <typename ArmTimerCb>
Future<void> _asyncWait(ArmTimerCb&& armTimer, const BatonHandle& baton) {
cancel(baton);
auto pf = makePromiseFuture<void>();
armTimer().getAsync([p = std::move(pf.promise)](Status status) mutable {
if (status.isOK()) {
p.emplaceValue();
} else {
p.setError(status);
}
});
return std::move(pf.future);
}
std::shared_ptr<asio::system_timer> _timer;
};
class TransportLayerASIO::ASIOReactor final : public Reactor {
public:
ASIOReactor() : _ioContext() {}
void run() noexcept override {
ThreadIdGuard threadIdGuard(this);
asio::io_context::work work(_ioContext);
try {
_ioContext.run();
} catch (...) {
severe() << "Uncaught exception in reactor: " << exceptionToStatus();
fassertFailed(40491);
}
}
void runFor(Milliseconds time) noexcept override {
ThreadIdGuard threadIdGuard(this);
asio::io_context::work work(_ioContext);
try {
_ioContext.run_for(time.toSystemDuration());
} catch (...) {
severe() << "Uncaught exception in reactor: " << exceptionToStatus();
fassertFailed(50473);
}
}
void stop() override {
_ioContext.stop();
}
void drain() override {
_ioContext.restart();
while (_ioContext.poll()) {
LOG(2) << "Draining remaining work in reactor.";
}
_ioContext.stop();
}
std::unique_ptr<ReactorTimer> makeTimer() override {
return std::make_unique<ASIOReactorTimer>(_ioContext);
}
Date_t now() override {
return Date_t(asio::system_timer::clock_type::now());
}
void schedule(ScheduleMode mode, Task task) override {
if (mode == kDispatch) {
asio::dispatch(_ioContext, std::move(task));
} else {
asio::post(_ioContext, std::move(task));
}
}
bool onReactorThread() const override {
return this == _reactorForThread;
}
operator asio::io_context&() {
return _ioContext;
}
private:
class ThreadIdGuard {
public:
ThreadIdGuard(TransportLayerASIO::ASIOReactor* reactor) {
_reactorForThread = reactor;
}
~ThreadIdGuard() {
_reactorForThread = nullptr;
}
};
static thread_local ASIOReactor* _reactorForThread;
asio::io_context _ioContext;
};
thread_local TransportLayerASIO::ASIOReactor* TransportLayerASIO::ASIOReactor::_reactorForThread =
nullptr;
TransportLayerASIO::Options::Options(const ServerGlobalParams* params)
: port(params->port),
ipList(params->bind_ips),
#ifndef _WIN32
useUnixSockets(!params->noUnixSocket),
#endif
enableIPv6(params->enableIPv6),
maxConns(params->maxConns) {
}
TransportLayerASIO::TransportLayerASIO(const TransportLayerASIO::Options& opts,
ServiceEntryPoint* sep)
: _ingressReactor(std::make_shared<ASIOReactor>()),
_egressReactor(std::make_shared<ASIOReactor>()),
_acceptorReactor(std::make_shared<ASIOReactor>()),
#ifdef MONGO_CONFIG_SSL
_ingressSSLContext(nullptr),
_egressSSLContext(nullptr),
#endif
_sep(sep),
_listenerOptions(opts) {
}
TransportLayerASIO::~TransportLayerASIO() = default;
class WrappedEndpoint {
public:
using Endpoint = asio::generic::stream_protocol::endpoint;
explicit WrappedEndpoint(const asio::ip::basic_resolver_entry<asio::ip::tcp>& source)
: _str(str::stream() << source.endpoint().address().to_string() << ":"
<< source.service_name()),
_endpoint(source.endpoint()) {}
#ifndef _WIN32
explicit WrappedEndpoint(const asio::local::stream_protocol::endpoint& source)
: _str(source.path()), _endpoint(source) {}
#endif
WrappedEndpoint() = default;
Endpoint* operator->() noexcept {
return &_endpoint;
}
const Endpoint* operator->() const noexcept {
return &_endpoint;
}
Endpoint& operator*() noexcept {
return _endpoint;
}
const Endpoint& operator*() const noexcept {
return _endpoint;
}
bool operator<(const WrappedEndpoint& rhs) const noexcept {
return _endpoint < rhs._endpoint;
}
const std::string& toString() const {
return _str;
}
sa_family_t family() const {
return _endpoint.data()->sa_family;
}
private:
std::string _str;
Endpoint _endpoint;
};
using Resolver = asio::ip::tcp::resolver;
class WrappedResolver {
public:
using Flags = Resolver::flags;
using EndpointVector = std::vector<WrappedEndpoint>;
explicit WrappedResolver(asio::io_context& ioCtx) : _resolver(ioCtx) {}
StatusWith<EndpointVector> resolve(const HostAndPort& peer, bool enableIPv6) {
if (auto unixEp = _checkForUnixSocket(peer)) {
return *unixEp;
}
// We always want to resolve the "service" (port number) as a numeric.
//
// We intentionally don't set the Resolver::address_configured flag because it might prevent
// us from connecting to localhost on hosts with only a loopback interface
// (see SERVER-1579).
const auto flags = Resolver::numeric_service;
// We resolve in two steps, the first step tries to resolve the hostname as an IP address -
// that way if there's a DNS timeout, we can still connect to IP addresses quickly.
// (See SERVER-1709)
//
// Then, if the numeric (IP address) lookup failed, we fall back to DNS or return the error
// from the resolver.
return _resolve(peer, flags | Resolver::numeric_host, enableIPv6)
.onError([=](Status) { return _resolve(peer, flags, enableIPv6); })
.getNoThrow();
}
Future<EndpointVector> asyncResolve(const HostAndPort& peer, bool enableIPv6) {
if (auto unixEp = _checkForUnixSocket(peer)) {
return *unixEp;
}
// We follow the same numeric -> hostname fallback procedure as the synchronous resolver
// function for setting resolver flags (see above).
const auto flags = Resolver::numeric_service;
return _asyncResolve(peer, flags | Resolver::numeric_host, enableIPv6).onError([=](Status) {
return _asyncResolve(peer, flags, enableIPv6);
});
}
void cancel() {
_resolver.cancel();
}
private:
boost::optional<EndpointVector> _checkForUnixSocket(const HostAndPort& peer) {
#ifndef _WIN32
if (mongoutils::str::contains(peer.host(), '/')) {
asio::local::stream_protocol::endpoint ep(peer.host());
return EndpointVector{WrappedEndpoint(ep)};
}
#endif
return boost::none;
}
Future<EndpointVector> _resolve(const HostAndPort& peer, Flags flags, bool enableIPv6) {
std::error_code ec;
auto port = std::to_string(peer.port());
Results results;
if (enableIPv6) {
results = _resolver.resolve(peer.host(), port, flags, ec);
} else {
results = _resolver.resolve(asio::ip::tcp::v4(), peer.host(), port, flags, ec);
}
if (ec) {
return _makeFuture(errorCodeToStatus(ec), peer);
} else {
return _makeFuture(results, peer);
}
}
Future<EndpointVector> _asyncResolve(const HostAndPort& peer, Flags flags, bool enableIPv6) {
auto port = std::to_string(peer.port());
Future<Results> ret;
if (enableIPv6) {
ret = _resolver.async_resolve(peer.host(), port, flags, UseFuture{});
} else {
ret =
_resolver.async_resolve(asio::ip::tcp::v4(), peer.host(), port, flags, UseFuture{});
}
return std::move(ret)
.onError([this, peer](Status status) { return _checkResults(status, peer); })
.then([this, peer](Results results) { return _makeFuture(results, peer); });
}
using Results = Resolver::results_type;
StatusWith<Results> _checkResults(StatusWith<Results> results, const HostAndPort& peer) {
if (!results.isOK()) {
return Status{ErrorCodes::HostNotFound,
str::stream() << "Could not find address for " << peer << ": "
<< results.getStatus()};
} else if (results.getValue().empty()) {
return Status{ErrorCodes::HostNotFound,
str::stream() << "Could not find address for " << peer};
} else {
return results;
}
}
Future<EndpointVector> _makeFuture(StatusWith<Results> results, const HostAndPort& peer) {
results = _checkResults(std::move(results), peer);
if (!results.isOK()) {
return results.getStatus();
} else {
auto& epl = results.getValue();
return EndpointVector(epl.begin(), epl.end());
}
}
Resolver _resolver;
};
Status makeConnectError(Status status, const HostAndPort& peer, const WrappedEndpoint& endpoint) {
std::string errmsg;
if (peer.toString() != endpoint.toString() && !endpoint.toString().empty()) {
errmsg = str::stream() << "Error connecting to " << peer << " (" << endpoint.toString()
<< ")";
} else {
errmsg = str::stream() << "Error connecting to " << peer;
}
return status.withContext(errmsg);
}
StatusWith<SessionHandle> TransportLayerASIO::connect(HostAndPort peer,
ConnectSSLMode sslMode,
Milliseconds timeout) {
std::error_code ec;
GenericSocket sock(*_egressReactor);
WrappedResolver resolver(*_egressReactor);
auto swEndpoints = resolver.resolve(peer, _listenerOptions.enableIPv6);
if (!swEndpoints.isOK()) {
return swEndpoints.getStatus();
}
auto endpoints = std::move(swEndpoints.getValue());
auto sws = _doSyncConnect(endpoints.front(), peer, timeout);
if (!sws.isOK()) {
return sws.getStatus();
}
auto session = std::move(sws.getValue());
session->ensureSync();
#ifndef _WIN32
if (endpoints.front().family() == AF_UNIX) {
return static_cast<SessionHandle>(std::move(session));
}
#endif
#ifndef MONGO_CONFIG_SSL
if (sslMode == kEnableSSL) {
return {ErrorCodes::InvalidSSLConfiguration, "SSL requested but not supported"};
}
#else
auto globalSSLMode = _sslMode();
if (sslMode == kEnableSSL ||
(sslMode == kGlobalSSLMode && ((globalSSLMode == SSLParams::SSLMode_preferSSL) ||
(globalSSLMode == SSLParams::SSLMode_requireSSL)))) {
auto sslStatus = session->handshakeSSLForEgress(peer).getNoThrow();
if (!sslStatus.isOK()) {
return sslStatus;
}
}
#endif
return static_cast<SessionHandle>(std::move(session));
}
template <typename Endpoint>
StatusWith<TransportLayerASIO::ASIOSessionHandle> TransportLayerASIO::_doSyncConnect(
Endpoint endpoint, const HostAndPort& peer, const Milliseconds& timeout) {
GenericSocket sock(*_egressReactor);
std::error_code ec;
sock.open(endpoint->protocol());
sock.non_blocking(true);
auto now = Date_t::now();
auto expiration = now + timeout;
do {
auto curTimeout = expiration - now;
sock.connect(*endpoint, curTimeout.toSystemDuration(), ec);
if (ec) {
now = Date_t::now();
}
// We loop below if ec == interrupted to deal with EINTR failures, otherwise we handle
// the error/timeout below.
} while (ec == asio::error::interrupted && now < expiration);
auto status = [&] {
if (ec) {
return errorCodeToStatus(ec);
} else if (now >= expiration) {
return Status(ErrorCodes::NetworkTimeout, "Timed out");
} else {
return Status::OK();
}
}();
if (!status.isOK()) {
return makeConnectError(status, peer, endpoint);
}
sock.non_blocking(false);
try {
return std::make_shared<ASIOSession>(this, std::move(sock), false);
} catch (const DBException& e) {
return e.toStatus();
}
}
Future<SessionHandle> TransportLayerASIO::asyncConnect(HostAndPort peer,
ConnectSSLMode sslMode,
const ReactorHandle& reactor,
Milliseconds timeout) {
struct AsyncConnectState {
AsyncConnectState(HostAndPort peer,
asio::io_context& context,
Promise<SessionHandle> promise_)
: promise(std::move(promise_)),
socket(context),
timeoutTimer(context),
resolver(context),
peer(std::move(peer)) {}
AtomicWord<bool> done{false};
Promise<SessionHandle> promise;
stdx::mutex mutex;
GenericSocket socket;
ASIOReactorTimer timeoutTimer;
WrappedResolver resolver;
WrappedEndpoint resolvedEndpoint;
const HostAndPort peer;
TransportLayerASIO::ASIOSessionHandle session;
};
auto reactorImpl = checked_cast<ASIOReactor*>(reactor.get());
auto pf = makePromiseFuture<SessionHandle>();
auto connector =
std::make_shared<AsyncConnectState>(std::move(peer), *reactorImpl, std::move(pf.promise));
Future<SessionHandle> mergedFuture = std::move(pf.future);
if (connector->peer.host().empty()) {
return Status{ErrorCodes::HostNotFound, "Hostname or IP address to connect to is empty"};
}
if (timeout > Milliseconds{0} && timeout < Milliseconds::max()) {
connector->timeoutTimer.waitUntil(reactor->now() + timeout)
.getAsync([connector](Status status) {
if (status == ErrorCodes::CallbackCanceled || connector->done.swap(true)) {
return;
}
connector->promise.setError(
makeConnectError({ErrorCodes::NetworkTimeout, "Connecting timed out"},
connector->peer,
connector->resolvedEndpoint));
std::error_code ec;
stdx::lock_guard<stdx::mutex> lk(connector->mutex);
connector->resolver.cancel();
if (connector->session) {
connector->session->end();
} else {
connector->socket.cancel(ec);
}
});
}
connector->resolver.asyncResolve(connector->peer, _listenerOptions.enableIPv6)
.then([connector](WrappedResolver::EndpointVector results) {
try {
stdx::lock_guard<stdx::mutex> lk(connector->mutex);
connector->resolvedEndpoint = results.front();
connector->socket.open(connector->resolvedEndpoint->protocol());
connector->socket.non_blocking(true);
} catch (asio::system_error& ex) {
return futurize(ex.code());
}
return connector->socket.async_connect(*connector->resolvedEndpoint, UseFuture{});
})
.then([this, connector, sslMode]() -> Future<void> {
stdx::unique_lock<stdx::mutex> lk(connector->mutex);
connector->session =
std::make_shared<ASIOSession>(this, std::move(connector->socket), false);
connector->session->ensureAsync();
#ifndef MONGO_CONFIG_SSL
if (sslMode == kEnableSSL) {
uasserted(ErrorCodes::InvalidSSLConfiguration, "SSL requested but not supported");
}
#else
auto globalSSLMode = _sslMode();
if (sslMode == kEnableSSL ||
(sslMode == kGlobalSSLMode && ((globalSSLMode == SSLParams::SSLMode_preferSSL) ||
(globalSSLMode == SSLParams::SSLMode_requireSSL)))) {
return connector->session
->handshakeSSLForEgressWithLock(std::move(lk), connector->peer)
.then([connector] { return Status::OK(); });
}
#endif
return Status::OK();
})
.onError([connector](Status status) -> Future<void> {
return makeConnectError(status, connector->peer, connector->resolvedEndpoint);
})
.getAsync([connector](Status connectResult) {
if (MONGO_FAIL_POINT(transportLayerASIOasyncConnectTimesOut)) {
log() << "asyncConnectTimesOut fail point is active. simulating timeout.";
return;
}
if (connector->done.swap(true)) {
return;
}
connector->timeoutTimer.cancel();
if (connectResult.isOK()) {
connector->promise.emplaceValue(std::move(connector->session));
} else {
connector->promise.setError(connectResult);
}
});
return mergedFuture;
}
Status TransportLayerASIO::setup() {
std::vector<std::string> listenAddrs;
if (_listenerOptions.ipList.empty() && _listenerOptions.isIngress()) {
listenAddrs = {"127.0.0.1"};
if (_listenerOptions.enableIPv6) {
listenAddrs.emplace_back("::1");
}
} else if (!_listenerOptions.ipList.empty()) {
listenAddrs = _listenerOptions.ipList;
}
#ifndef _WIN32
if (_listenerOptions.useUnixSockets && _listenerOptions.isIngress()) {
listenAddrs.emplace_back(makeUnixSockPath(_listenerOptions.port));
}
#endif
if (!(_listenerOptions.isIngress()) && !listenAddrs.empty()) {
return {ErrorCodes::BadValue,
"Cannot bind to listening sockets with ingress networking is disabled"};
}
_listenerPort = _listenerOptions.port;
WrappedResolver resolver(*_acceptorReactor);
// Self-deduplicating list of unique endpoint addresses.
std::set<WrappedEndpoint> endpoints;
for (auto& ip : listenAddrs) {
if (ip.empty()) {
warning() << "Skipping empty bind address";
continue;
}
auto swAddrs =
resolver.resolve(HostAndPort(ip, _listenerPort), _listenerOptions.enableIPv6);
if (!swAddrs.isOK()) {
warning() << "Found no addresses for " << swAddrs.getStatus();
continue;
}
auto& addrs = swAddrs.getValue();
endpoints.insert(addrs.begin(), addrs.end());
}
for (auto& addr : endpoints) {
#ifndef _WIN32
if (addr.family() == AF_UNIX) {
if (::unlink(addr.toString().c_str()) == -1 && errno != ENOENT) {
error() << "Failed to unlink socket file " << addr.toString().c_str() << " "
<< errnoWithDescription(errno);
fassertFailedNoTrace(40486);
}
}
#endif
if (addr.family() == AF_INET6 && !_listenerOptions.enableIPv6) {
error() << "Specified ipv6 bind address, but ipv6 is disabled";
fassertFailedNoTrace(40488);
}
GenericAcceptor acceptor(*_acceptorReactor);
acceptor.open(addr->protocol());
acceptor.set_option(GenericAcceptor::reuse_address(true));
if (addr.family() == AF_INET6) {
acceptor.set_option(asio::ip::v6_only(true));
}
std::error_code ec;
acceptor.non_blocking(true, ec);
if (ec) {
return errorCodeToStatus(ec);
}
acceptor.bind(*addr, ec);
if (ec) {
return errorCodeToStatus(ec);
}
#ifndef _WIN32
if (addr.family() == AF_UNIX) {
if (::chmod(addr.toString().c_str(), serverGlobalParams.unixSocketPermissions) == -1) {
error() << "Failed to chmod socket file " << addr.toString().c_str() << " "
<< errnoWithDescription(errno);
fassertFailedNoTrace(40487);
}
}
#endif
if (_listenerOptions.port == 0 && (addr.family() == AF_INET || addr.family() == AF_INET6)) {
if (_listenerPort != _listenerOptions.port) {
return Status(ErrorCodes::BadValue,
"Port 0 (ephemeral port) is not allowed when"
" listening on multiple IP interfaces");
}
std::error_code ec;
auto endpoint = acceptor.local_endpoint(ec);
if (ec) {
return errorCodeToStatus(ec);
}
_listenerPort = endpointToHostAndPort(endpoint).port();
}
sockaddr_storage sa;
memcpy(&sa, addr->data(), addr->size());
_acceptors.emplace_back(SockAddr(sa, addr->size()), std::move(acceptor));
}
if (_acceptors.empty() && _listenerOptions.isIngress()) {
return Status(ErrorCodes::SocketException, "No available addresses/ports to bind to");
}
#ifdef MONGO_CONFIG_SSL
const auto& sslParams = getSSLGlobalParams();
if (_sslMode() != SSLParams::SSLMode_disabled && _listenerOptions.isIngress()) {
_ingressSSLContext = stdx::make_unique<asio::ssl::context>(asio::ssl::context::sslv23);
Status status =
getSSLManager()->initSSLContext(_ingressSSLContext->native_handle(),
sslParams,
SSLManagerInterface::ConnectionDirection::kIncoming);
if (!status.isOK()) {
return status;
}
}
if (_listenerOptions.isEgress() && getSSLManager()) {
_egressSSLContext = stdx::make_unique<asio::ssl::context>(asio::ssl::context::sslv23);
Status status =
getSSLManager()->initSSLContext(_egressSSLContext->native_handle(),
sslParams,
SSLManagerInterface::ConnectionDirection::kOutgoing);
if (!status.isOK()) {
return status;
}
}
#endif
return Status::OK();
}
Status TransportLayerASIO::start() {
stdx::lock_guard<stdx::mutex> lk(_mutex);
_running.store(true);
if (_listenerOptions.isIngress()) {
for (auto& acceptor : _acceptors) {
acceptor.second.listen(serverGlobalParams.listenBacklog);
_acceptConnection(acceptor.second);
log() << "Listening on " << acceptor.first.getAddr();
}
_listenerThread = stdx::thread([this] {
setThreadName("listener");
while (_running.load()) {
_acceptorReactor->run();
}
});
const char* ssl = "";
#ifdef MONGO_CONFIG_SSL
if (_sslMode() != SSLParams::SSLMode_disabled) {
ssl = " ssl";
}
#endif
log() << "waiting for connections on port " << _listenerPort << ssl;
} else {
invariant(_acceptors.empty());
}
return Status::OK();
}
void TransportLayerASIO::shutdown() {
stdx::lock_guard<stdx::mutex> lk(_mutex);
_running.store(false);
// Loop through the acceptors and cancel their calls to async_accept. This will prevent new
// connections from being opened.
for (auto& acceptor : _acceptors) {
acceptor.second.cancel();
auto& addr = acceptor.first;
if (addr.getType() == AF_UNIX && !addr.isAnonymousUNIXSocket()) {
auto path = addr.getAddr();
log() << "removing socket file: " << path;
if (::unlink(path.c_str()) != 0) {
const auto ewd = errnoWithDescription();
warning() << "Unable to remove UNIX socket " << path << ": " << ewd;
}
}
}
// If the listener thread is joinable (that is, we created/started a listener thread), then
// the io_context is owned exclusively by the TransportLayer and we should stop it and join
// the listener thread.
//
// Otherwise the ServiceExecutor may need to continue running the io_context to drain running
// connections, so we just cancel the acceptors and return.
if (_listenerThread.joinable()) {
_acceptorReactor->stop();
_listenerThread.join();
}
}
ReactorHandle TransportLayerASIO::getReactor(WhichReactor which) {
switch (which) {
case TransportLayer::kIngress:
return _ingressReactor;
case TransportLayer::kEgress:
return _egressReactor;
case TransportLayer::kNewReactor:
return std::make_shared<ASIOReactor>();
}
MONGO_UNREACHABLE;
}
void TransportLayerASIO::_acceptConnection(GenericAcceptor& acceptor) {
auto acceptCb = [this, &acceptor](const std::error_code& ec, GenericSocket peerSocket) mutable {
if (!_running.load())
return;
if (ec) {
log() << "Error accepting new connection on "
<< endpointToHostAndPort(acceptor.local_endpoint()) << ": " << ec.message();
_acceptConnection(acceptor);
return;
}
try {
std::shared_ptr<ASIOSession> session(
new ASIOSession(this, std::move(peerSocket), true));
_sep->startSession(std::move(session));
} catch (const DBException& e) {
warning() << "Error accepting new connection " << e;
}
_acceptConnection(acceptor);
};
acceptor.async_accept(*_ingressReactor, std::move(acceptCb));
}
#ifdef MONGO_CONFIG_SSL
SSLParams::SSLModes TransportLayerASIO::_sslMode() const {
return static_cast<SSLParams::SSLModes>(getSSLGlobalParams().sslMode.load());
}
#endif
BatonHandle TransportLayerASIO::makeBaton(OperationContext* opCtx) {
#ifdef __linux__
auto baton = std::make_shared<BatonASIO>(opCtx);
{
stdx::lock_guard<Client> lk(*opCtx->getClient());
invariant(!opCtx->getBaton());
opCtx->setBaton(baton);
}
return std::move(baton);
#else
return nullptr;
#endif
}
} // namespace transport
} // namespace mongo
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