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listener_impl.cc
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#include "source/server/listener_impl.h"
#include "envoy/config/core/v3/base.pb.h"
#include "envoy/config/listener/v3/listener.pb.h"
#include "envoy/config/listener/v3/listener_components.pb.h"
#include "envoy/extensions/filters/listener/proxy_protocol/v3/proxy_protocol.pb.h"
#include "envoy/extensions/udp_packet_writer/v3/udp_default_writer_factory.pb.h"
#include "envoy/network/exception.h"
#include "envoy/registry/registry.h"
#include "envoy/server/options.h"
#include "envoy/server/transport_socket_config.h"
#include "envoy/singleton/manager.h"
#include "envoy/stats/scope.h"
#include "source/common/access_log/access_log_impl.h"
#include "source/common/api/os_sys_calls_impl.h"
#include "source/common/common/assert.h"
#include "source/common/config/utility.h"
#include "source/common/network/connection_balancer_impl.h"
#include "source/common/network/resolver_impl.h"
#include "source/common/network/socket_option_factory.h"
#include "source/common/network/socket_option_impl.h"
#include "source/common/network/udp_listener_impl.h"
#include "source/common/network/udp_packet_writer_handler_impl.h"
#include "source/common/network/utility.h"
#include "source/common/protobuf/utility.h"
#include "source/common/runtime/runtime_features.h"
#include "source/server/active_raw_udp_listener_config.h"
#include "source/server/configuration_impl.h"
#include "source/server/drain_manager_impl.h"
#include "source/server/filter_chain_manager_impl.h"
#include "source/server/listener_manager_impl.h"
#include "source/server/transport_socket_config_impl.h"
#ifdef ENVOY_ENABLE_QUIC
#include "source/common/quic/active_quic_listener.h"
#include "source/common/quic/udp_gso_batch_writer.h"
#endif
namespace Envoy {
namespace Server {
namespace {
bool anyFilterChain(
const envoy::config::listener::v3::Listener& config,
std::function<bool(const envoy::config::listener::v3::FilterChain&)> predicate) {
return (config.has_default_filter_chain() && predicate(config.default_filter_chain())) ||
std::any_of(config.filter_chains().begin(), config.filter_chains().end(), predicate);
}
bool usesProxyProto(const envoy::config::listener::v3::Listener& config) {
// Checking only the first or default filter chain is done for backwards compatibility.
const bool use_proxy_proto = PROTOBUF_GET_WRAPPED_OR_DEFAULT(
config.filter_chains().empty() ? config.default_filter_chain() : config.filter_chains()[0],
use_proxy_proto, false);
if (use_proxy_proto) {
ENVOY_LOG_MISC(warn,
"using deprecated field 'use_proxy_proto' is dangerous as it does not respect "
"listener filter order. Do not use this field and instead configure the proxy "
"proto listener filter directly.");
}
return use_proxy_proto;
}
bool shouldBindToPort(const envoy::config::listener::v3::Listener& config) {
return PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, bind_to_port, true) &&
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config.deprecated_v1(), bind_to_port, true);
}
} // namespace
ListenSocketFactoryImpl::ListenSocketFactoryImpl(
ListenerComponentFactory& factory, Network::Address::InstanceConstSharedPtr address,
Network::Socket::Type socket_type, const Network::Socket::OptionsSharedPtr& options,
const std::string& listener_name, uint32_t tcp_backlog_size,
ListenerComponentFactory::BindType bind_type,
const Network::SocketCreationOptions& creation_options, uint32_t num_sockets)
: factory_(factory), local_address_(address), socket_type_(socket_type), options_(options),
listener_name_(listener_name), tcp_backlog_size_(tcp_backlog_size), bind_type_(bind_type),
socket_creation_options_(creation_options) {
if (local_address_->type() == Network::Address::Type::Ip) {
if (socket_type == Network::Socket::Type::Datagram) {
ASSERT(bind_type_ == ListenerComponentFactory::BindType::ReusePort || num_sockets == 1u);
}
} else {
if (local_address_->type() == Network::Address::Type::Pipe) {
// Listeners with Unix domain socket always use shared socket.
// TODO(mattklein123): This should be blocked at the config parsing layer instead of getting
// here and disabling reuse_port.
if (bind_type_ == ListenerComponentFactory::BindType::ReusePort) {
bind_type_ = ListenerComponentFactory::BindType::NoReusePort;
}
} else {
ASSERT(local_address_->type() == Network::Address::Type::EnvoyInternal);
bind_type_ = ListenerComponentFactory::BindType::NoBind;
}
}
sockets_.push_back(createListenSocketAndApplyOptions(factory, socket_type, 0));
if (sockets_[0] != nullptr && local_address_->ip() && local_address_->ip()->port() == 0) {
local_address_ = sockets_[0]->connectionInfoProvider().localAddress();
}
ENVOY_LOG(debug, "Set listener {} socket factory local address to {}", listener_name,
local_address_->asString());
// Now create the remainder of the sockets that will be used by the rest of the workers.
for (uint32_t i = 1; i < num_sockets; i++) {
if (bind_type_ != ListenerComponentFactory::BindType::ReusePort && sockets_[0] != nullptr) {
sockets_.push_back(sockets_[0]->duplicate());
} else {
sockets_.push_back(createListenSocketAndApplyOptions(factory, socket_type, i));
}
}
ASSERT(sockets_.size() == num_sockets);
}
ListenSocketFactoryImpl::ListenSocketFactoryImpl(const ListenSocketFactoryImpl& factory_to_clone)
: factory_(factory_to_clone.factory_), local_address_(factory_to_clone.local_address_),
socket_type_(factory_to_clone.socket_type_), options_(factory_to_clone.options_),
listener_name_(factory_to_clone.listener_name_),
tcp_backlog_size_(factory_to_clone.tcp_backlog_size_),
bind_type_(factory_to_clone.bind_type_),
socket_creation_options_(factory_to_clone.socket_creation_options_) {
for (auto& socket : factory_to_clone.sockets_) {
// In the cloning case we always duplicate() the socket. This makes sure that during listener
// update/drain we don't lose any incoming connections when using reuse_port. Specifically on
// Linux the use of SO_REUSEPORT causes the kernel to allocate a separate queue for each socket
// on the same address. Incoming connections are immediately assigned to one of these queues.
// If connections are in the queue when the socket is closed, they are closed/reset, not sent to
// another queue. So avoid making extra queues in the kernel, even temporarily.
//
// TODO(mattklein123): In the current code as long as the address matches, the socket factory
// will be cloned, effectively ignoring any changed socket options. The code should probably
// block any updates to listeners that use the same address but different socket options.
// (It's possible we could handle changing some socket options, but this would be tricky and
// probably not worth the difficulty.)
sockets_.push_back(socket->duplicate());
}
}
Network::SocketSharedPtr ListenSocketFactoryImpl::createListenSocketAndApplyOptions(
ListenerComponentFactory& factory, Network::Socket::Type socket_type, uint32_t worker_index) {
// Socket might be nullptr when doing server validation.
// TODO(mattklein123): See the comment in the validation code. Make that code not return nullptr
// so this code can be simpler.
Network::SocketSharedPtr socket = factory.createListenSocket(
local_address_, socket_type, options_, bind_type_, socket_creation_options_, worker_index);
// Binding is done by now.
ENVOY_LOG(debug, "Create listen socket for listener {} on address {}", listener_name_,
local_address_->asString());
if (socket != nullptr && options_ != nullptr) {
const bool ok = Network::Socket::applyOptions(
options_, *socket, envoy::config::core::v3::SocketOption::STATE_BOUND);
const std::string message =
fmt::format("{}: Setting socket options {}", listener_name_, ok ? "succeeded" : "failed");
if (!ok) {
ENVOY_LOG(warn, "{}", message);
throw Network::SocketOptionException(message);
} else {
ENVOY_LOG(debug, "{}", message);
}
// Add the options to the socket_ so that STATE_LISTENING options can be
// set after listen() is called and immediately before the workers start running.
socket->addOptions(options_);
}
return socket;
}
Network::SocketSharedPtr ListenSocketFactoryImpl::getListenSocket(uint32_t worker_index) {
// Per the TODO above, sockets at this point can never be null. That only happens in the
// config validation path.
ASSERT(worker_index < sockets_.size() && sockets_[worker_index] != nullptr);
return sockets_[worker_index];
}
void ListenSocketFactoryImpl::doFinalPreWorkerInit() {
if (bind_type_ == ListenerComponentFactory::BindType::NoBind ||
socket_type_ != Network::Socket::Type::Stream) {
return;
}
ASSERT(!sockets_.empty());
auto listen_and_apply_options = [](Envoy::Network::SocketSharedPtr socket, int tcp_backlog_size) {
const auto rc = socket->ioHandle().listen(tcp_backlog_size);
if (rc.return_value_ != 0) {
throw EnvoyException(fmt::format("cannot listen() errno={}", rc.errno_));
}
if (!Network::Socket::applyOptions(socket->options(), *socket,
envoy::config::core::v3::SocketOption::STATE_LISTENING)) {
throw Network::SocketOptionException(
fmt::format("cannot set post-listen socket option on socket: {}",
socket->connectionInfoProvider().localAddress()->asString()));
}
};
// On all platforms we should listen on the first socket.
auto iterator = sockets_.begin();
listen_and_apply_options(*iterator, tcp_backlog_size_);
++iterator;
#ifndef WIN32
// With this implementation on Windows we only accept
// connections on Worker 1 and then we use the `ExactConnectionBalancer`
// to balance these connections to all workers.
// TODO(davinci26): We should update the behavior when socket duplication
// does not cause accepts to hang in the OS.
for (; iterator != sockets_.end(); ++iterator) {
listen_and_apply_options(*iterator, tcp_backlog_size_);
}
#endif
}
ListenerFactoryContextBaseImpl::ListenerFactoryContextBaseImpl(
Envoy::Server::Instance& server, ProtobufMessage::ValidationVisitor& validation_visitor,
const envoy::config::listener::v3::Listener& config, DrainManagerPtr drain_manager)
: server_(server), metadata_(config.metadata()), typed_metadata_(config.metadata()),
direction_(config.traffic_direction()), global_scope_(server.stats().createScope("")),
listener_scope_(server_.stats().createScope(
fmt::format("listener.{}.",
!config.stat_prefix().empty()
? config.stat_prefix()
: Network::Address::resolveProtoAddress(config.address())->asString()))),
validation_visitor_(validation_visitor), drain_manager_(std::move(drain_manager)),
is_quic_(config.udp_listener_config().has_quic_options()) {}
AccessLog::AccessLogManager& ListenerFactoryContextBaseImpl::accessLogManager() {
return server_.accessLogManager();
}
Upstream::ClusterManager& ListenerFactoryContextBaseImpl::clusterManager() {
return server_.clusterManager();
}
Event::Dispatcher& ListenerFactoryContextBaseImpl::mainThreadDispatcher() {
return server_.dispatcher();
}
const Server::Options& ListenerFactoryContextBaseImpl::options() { return server_.options(); }
Grpc::Context& ListenerFactoryContextBaseImpl::grpcContext() { return server_.grpcContext(); }
bool ListenerFactoryContextBaseImpl::healthCheckFailed() { return server_.healthCheckFailed(); }
Http::Context& ListenerFactoryContextBaseImpl::httpContext() { return server_.httpContext(); }
Router::Context& ListenerFactoryContextBaseImpl::routerContext() { return server_.routerContext(); }
const LocalInfo::LocalInfo& ListenerFactoryContextBaseImpl::localInfo() const {
return server_.localInfo();
}
Envoy::Runtime::Loader& ListenerFactoryContextBaseImpl::runtime() { return server_.runtime(); }
Stats::Scope& ListenerFactoryContextBaseImpl::scope() { return *global_scope_; }
Singleton::Manager& ListenerFactoryContextBaseImpl::singletonManager() {
return server_.singletonManager();
}
OverloadManager& ListenerFactoryContextBaseImpl::overloadManager() {
return server_.overloadManager();
}
ThreadLocal::Instance& ListenerFactoryContextBaseImpl::threadLocal() {
return server_.threadLocal();
}
Admin& ListenerFactoryContextBaseImpl::admin() { return server_.admin(); }
const envoy::config::core::v3::Metadata& ListenerFactoryContextBaseImpl::listenerMetadata() const {
return metadata_;
};
const Envoy::Config::TypedMetadata& ListenerFactoryContextBaseImpl::listenerTypedMetadata() const {
return typed_metadata_;
}
envoy::config::core::v3::TrafficDirection ListenerFactoryContextBaseImpl::direction() const {
return direction_;
};
TimeSource& ListenerFactoryContextBaseImpl::timeSource() { return api().timeSource(); }
ProtobufMessage::ValidationContext& ListenerFactoryContextBaseImpl::messageValidationContext() {
return server_.messageValidationContext();
}
ProtobufMessage::ValidationVisitor& ListenerFactoryContextBaseImpl::messageValidationVisitor() {
return validation_visitor_;
}
Api::Api& ListenerFactoryContextBaseImpl::api() { return server_.api(); }
ServerLifecycleNotifier& ListenerFactoryContextBaseImpl::lifecycleNotifier() {
return server_.lifecycleNotifier();
}
ProcessContextOptRef ListenerFactoryContextBaseImpl::processContext() {
return server_.processContext();
}
Configuration::ServerFactoryContext&
ListenerFactoryContextBaseImpl::getServerFactoryContext() const {
return server_.serverFactoryContext();
}
Configuration::TransportSocketFactoryContext&
ListenerFactoryContextBaseImpl::getTransportSocketFactoryContext() const {
return server_.transportSocketFactoryContext();
}
Stats::Scope& ListenerFactoryContextBaseImpl::listenerScope() { return *listener_scope_; }
bool ListenerFactoryContextBaseImpl::isQuicListener() const { return is_quic_; }
Network::DrainDecision& ListenerFactoryContextBaseImpl::drainDecision() { return *this; }
Server::DrainManager& ListenerFactoryContextBaseImpl::drainManager() { return *drain_manager_; }
// Must be overridden
Init::Manager& ListenerFactoryContextBaseImpl::initManager() { PANIC("not implemented"); }
ListenerImpl::ListenerImpl(const envoy::config::listener::v3::Listener& config,
const std::string& version_info, ListenerManagerImpl& parent,
const std::string& name, bool added_via_api, bool workers_started,
uint64_t hash)
: parent_(parent), socket_type_(Network::Utility::protobufAddressSocketType(config.address())),
bind_to_port_(shouldBindToPort(config)), mptcp_enabled_(config.enable_mptcp()),
hand_off_restored_destination_connections_(
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, use_original_dst, false)),
per_connection_buffer_limit_bytes_(
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, per_connection_buffer_limit_bytes, 1024 * 1024)),
listener_tag_(parent_.factory_.nextListenerTag()), name_(name), added_via_api_(added_via_api),
workers_started_(workers_started), hash_(hash),
tcp_backlog_size_(
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, tcp_backlog_size, ENVOY_TCP_BACKLOG_SIZE)),
validation_visitor_(
added_via_api_ ? parent_.server_.messageValidationContext().dynamicValidationVisitor()
: parent_.server_.messageValidationContext().staticValidationVisitor()),
ignore_global_conn_limit_(config.ignore_global_conn_limit()),
listener_init_target_(fmt::format("Listener-init-target {}", name),
[this]() { dynamic_init_manager_->initialize(local_init_watcher_); }),
dynamic_init_manager_(std::make_unique<Init::ManagerImpl>(
fmt::format("Listener-local-init-manager {} {}", name, hash))),
config_(config), version_info_(version_info),
listener_filters_timeout_(
PROTOBUF_GET_MS_OR_DEFAULT(config, listener_filters_timeout, 15000)),
continue_on_listener_filters_timeout_(config.continue_on_listener_filters_timeout()),
listener_factory_context_(std::make_shared<PerListenerFactoryContextImpl>(
parent.server_, validation_visitor_, config, this, *this,
parent.factory_.createDrainManager(config.drain_type()))),
reuse_port_(getReusePortOrDefault(parent_.server_, config_)),
cx_limit_runtime_key_("envoy.resource_limits.listener." + config_.name() +
".connection_limit"),
open_connections_(std::make_shared<BasicResourceLimitImpl>(
std::numeric_limits<uint64_t>::max(), listener_factory_context_->runtime(),
cx_limit_runtime_key_)),
local_init_watcher_(fmt::format("Listener-local-init-watcher {}", name),
[this] {
if (workers_started_) {
parent_.onListenerWarmed(*this);
} else {
// Notify Server that this listener is
// ready.
listener_init_target_.ready();
}
}),
transport_factory_context_(
std::make_shared<Server::Configuration::TransportSocketFactoryContextImpl>(
parent_.server_.admin(), parent_.server_.sslContextManager(), listenerScope(),
parent_.server_.clusterManager(), parent_.server_.localInfo(),
parent_.server_.dispatcher(), parent_.server_.stats(),
parent_.server_.singletonManager(), parent_.server_.threadLocal(),
validation_visitor_, parent_.server_.api(), parent_.server_.options(),
parent_.server_.accessLogManager())),
quic_stat_names_(parent_.quicStatNames()),
missing_listener_config_stats_({ALL_MISSING_LISTENER_CONFIG_STATS(
POOL_COUNTER(listener_factory_context_->listenerScope()))}) {
// All the addresses should be same socket type, so get the first address's socket type is enough.
auto address = Network::Address::resolveProtoAddress(config.address());
checkIpv4CompatAddress(address, config.address());
addresses_.emplace_back(address);
for (auto i = 0; i < config.additional_addresses_size(); i++) {
if (socket_type_ !=
Network::Utility::protobufAddressSocketType(config.additional_addresses(i).address())) {
throw EnvoyException(fmt::format("listener {}: has different socket type. The listener only "
"support same socket type for all the addresses.",
name_));
}
auto additional_address =
Network::Address::resolveProtoAddress(config.additional_addresses(i).address());
checkIpv4CompatAddress(address, config.additional_addresses(i).address());
addresses_.emplace_back(additional_address);
}
const absl::optional<std::string> runtime_val =
listener_factory_context_->runtime().snapshot().get(cx_limit_runtime_key_);
if (runtime_val && runtime_val->empty()) {
ENVOY_LOG(warn,
"Listener connection limit runtime key {} is empty. There are currently no "
"limitations on the number of accepted connections for listener {}.",
cx_limit_runtime_key_, config_.name());
}
filter_chain_manager_ = std::make_unique<FilterChainManagerImpl>(
addresses_, listener_factory_context_->parentFactoryContext(), initManager()),
buildAccessLog();
validateConfig();
// buildUdpListenerFactory() must come before buildListenSocketOptions() because the UDP
// listener factory can provide additional options.
buildUdpListenerFactory(parent_.server_.options().concurrency());
buildListenSocketOptions();
createListenerFilterFactories();
validateFilterChains();
buildFilterChains();
if (socket_type_ != Network::Socket::Type::Datagram) {
buildSocketOptions();
buildOriginalDstListenerFilter();
buildProxyProtocolListenerFilter();
buildInternalListener();
}
if (!workers_started_) {
// Initialize dynamic_init_manager_ from Server's init manager if it's not initialized.
// NOTE: listener_init_target_ should be added to parent's initManager at the end of the
// listener constructor so that this listener's children entities could register their targets
// with their parent's initManager.
parent_.server_.initManager().add(listener_init_target_);
}
}
ListenerImpl::ListenerImpl(ListenerImpl& origin,
const envoy::config::listener::v3::Listener& config,
const std::string& version_info, ListenerManagerImpl& parent,
const std::string& name, bool added_via_api, bool workers_started,
uint64_t hash)
: parent_(parent), addresses_(origin.addresses_), socket_type_(origin.socket_type_),
bind_to_port_(shouldBindToPort(config)), mptcp_enabled_(config.enable_mptcp()),
hand_off_restored_destination_connections_(
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, use_original_dst, false)),
per_connection_buffer_limit_bytes_(
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, per_connection_buffer_limit_bytes, 1024 * 1024)),
listener_tag_(origin.listener_tag_), name_(name), added_via_api_(added_via_api),
workers_started_(workers_started), hash_(hash),
tcp_backlog_size_(
PROTOBUF_GET_WRAPPED_OR_DEFAULT(config, tcp_backlog_size, ENVOY_TCP_BACKLOG_SIZE)),
validation_visitor_(
added_via_api_ ? parent_.server_.messageValidationContext().dynamicValidationVisitor()
: parent_.server_.messageValidationContext().staticValidationVisitor()),
ignore_global_conn_limit_(config.ignore_global_conn_limit()),
// listener_init_target_ is not used during in place update because we expect server started.
listener_init_target_("", nullptr),
dynamic_init_manager_(std::make_unique<Init::ManagerImpl>(
fmt::format("Listener-local-init-manager {} {}", name, hash))),
config_(config), version_info_(version_info),
listener_filters_timeout_(
PROTOBUF_GET_MS_OR_DEFAULT(config, listener_filters_timeout, 15000)),
continue_on_listener_filters_timeout_(config.continue_on_listener_filters_timeout()),
udp_listener_config_(origin.udp_listener_config_),
connection_balancers_(origin.connection_balancers_),
listener_factory_context_(std::make_shared<PerListenerFactoryContextImpl>(
origin.listener_factory_context_->listener_factory_context_base_, this, *this)),
filter_chain_manager_(std::make_unique<FilterChainManagerImpl>(
addresses_, origin.listener_factory_context_->parentFactoryContext(), initManager(),
*origin.filter_chain_manager_)),
reuse_port_(origin.reuse_port_),
local_init_watcher_(fmt::format("Listener-local-init-watcher {}", name),
[this] {
ASSERT(workers_started_);
parent_.inPlaceFilterChainUpdate(*this);
}),
transport_factory_context_(origin.transport_factory_context_),
quic_stat_names_(parent_.quicStatNames()),
missing_listener_config_stats_({ALL_MISSING_LISTENER_CONFIG_STATS(
POOL_COUNTER(listener_factory_context_->listenerScope()))}) {
buildAccessLog();
validateConfig();
buildListenSocketOptions();
createListenerFilterFactories();
validateFilterChains();
buildFilterChains();
buildInternalListener();
if (socket_type_ == Network::Socket::Type::Stream) {
// Apply the options below only for TCP.
buildSocketOptions();
buildOriginalDstListenerFilter();
buildProxyProtocolListenerFilter();
open_connections_ = origin.open_connections_;
}
}
void ListenerImpl::checkIpv4CompatAddress(const Network::Address::InstanceConstSharedPtr& address,
const envoy::config::core::v3::Address& proto_address) {
if ((address->type() == Network::Address::Type::Ip &&
proto_address.socket_address().ipv4_compat()) &&
(address->ip()->version() != Network::Address::IpVersion::v6 ||
(!address->ip()->isAnyAddress() &&
address->ip()->ipv6()->v4CompatibleAddress() == nullptr))) {
if (Runtime::runtimeFeatureEnabled("envoy.reloadable_features.strict_check_on_ipv4_compat")) {
throw EnvoyException(fmt::format(
"Only IPv6 address '::' or valid IPv4-mapped IPv6 address can set ipv4_compat: {}",
address->asStringView()));
} else {
ENVOY_LOG(warn, "An invalid IPv4-mapped IPv6 address is used when ipv4_compat is set: {}",
address->asStringView());
}
}
}
void ListenerImpl::validateConfig() {
if (mptcp_enabled_) {
if (socket_type_ != Network::Socket::Type::Stream) {
throw EnvoyException(
fmt::format("listener {}: enable_mptcp can only be used with TCP listeners", name_));
}
for (auto& address : addresses_) {
if (address->type() != Network::Address::Type::Ip) {
throw EnvoyException(
fmt::format("listener {}: enable_mptcp can only be used with IP addresses", name_));
}
}
if (!Api::OsSysCallsSingleton::get().supportsMptcp()) {
throw EnvoyException(fmt::format(
"listener {}: enable_mptcp is set but MPTCP is not supported by the operating system",
name_));
}
}
}
void ListenerImpl::buildAccessLog() {
for (const auto& access_log : config_.access_log()) {
AccessLog::InstanceSharedPtr current_access_log =
AccessLog::AccessLogFactory::fromProto(access_log, *listener_factory_context_);
access_logs_.push_back(current_access_log);
}
}
void ListenerImpl::buildInternalListener() {
if (config_.address().has_envoy_internal_address()) {
if (config_.has_api_listener()) {
throw EnvoyException(
fmt::format("error adding listener '{}': internal address cannot be used in api listener",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
}
if ((config_.has_connection_balance_config() &&
config_.connection_balance_config().has_exact_balance()) ||
config_.enable_mptcp() ||
config_.has_enable_reuse_port() // internal listener doesn't use physical l4 port.
|| (config_.has_freebind() && config_.freebind().value()) ||
config_.has_tcp_backlog_size() || config_.has_tcp_fast_open_queue_length() ||
(config_.has_transparent() && config_.transparent().value())) {
throw EnvoyException(
fmt::format("error adding listener '{}': has unsupported tcp listener feature",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
}
if (!config_.socket_options().empty()) {
throw EnvoyException(
fmt::format("error adding listener '{}': does not support socket option",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
}
std::shared_ptr<Network::InternalListenerRegistry> internal_listener_registry =
parent_.server_.singletonManager().getTyped<Network::InternalListenerRegistry>(
"internal_listener_registry_singleton");
if (internal_listener_registry == nullptr) {
throw EnvoyException(
fmt::format("error adding listener '{}': internal listener registry is not initialized.",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
}
internal_listener_config_ =
std::make_unique<InternalListenerConfigImpl>(*internal_listener_registry);
} else {
if (config_.has_internal_listener()) {
throw EnvoyException(
fmt::format("error adding listener '{}': address is not an internal "
"address but an internal listener config is provided",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
}
}
}
void ListenerImpl::buildUdpListenerWorkerRouter(const Network::Address::Instance& address,
uint32_t concurrency) {
if (socket_type_ != Network::Socket::Type::Datagram) {
return;
}
auto iter = udp_listener_config_->listener_worker_routers_.find(address.asString());
if (iter != udp_listener_config_->listener_worker_routers_.end()) {
return;
}
udp_listener_config_->listener_worker_routers_.emplace(
address.asString(), std::make_unique<Network::UdpListenerWorkerRouterImpl>(concurrency));
}
void ListenerImpl::buildUdpListenerFactory(uint32_t concurrency) {
if (socket_type_ != Network::Socket::Type::Datagram) {
return;
}
if (!reuse_port_ && concurrency > 1) {
throw EnvoyException("Listening on UDP when concurrency is > 1 without the SO_REUSEPORT "
"socket option results in "
"unstable packet proxying. Configure the reuse_port listener option or "
"set concurrency = 1.");
}
udp_listener_config_ = std::make_shared<UdpListenerConfigImpl>(config_.udp_listener_config());
ProtobufTypes::MessagePtr udp_packet_packet_writer_config;
if (config_.udp_listener_config().has_udp_packet_packet_writer_config()) {
auto* factory_factory = Config::Utility::getFactory<Network::UdpPacketWriterFactoryFactory>(
config_.udp_listener_config().udp_packet_packet_writer_config());
udp_listener_config_->writer_factory_ = factory_factory->createUdpPacketWriterFactory(
config_.udp_listener_config().udp_packet_packet_writer_config());
}
if (config_.udp_listener_config().has_quic_options()) {
#ifdef ENVOY_ENABLE_QUIC
if (config_.has_connection_balance_config()) {
throw EnvoyException("connection_balance_config is configured for QUIC listener which "
"doesn't work with connection balancer.");
}
udp_listener_config_->listener_factory_ = std::make_unique<Quic::ActiveQuicListenerFactory>(
config_.udp_listener_config().quic_options(), concurrency, quic_stat_names_);
#if UDP_GSO_BATCH_WRITER_COMPILETIME_SUPPORT
// TODO(mattklein123): We should be able to use GSO without QUICHE/QUIC. Right now this causes
// non-QUIC integration tests to fail, which I haven't investigated yet. Additionally, from
// looking at the GSO code there are substantial copying inefficiency so I don't think it's
// wise to enable to globally for now. I will circle back and fix both of the above with
// a non-QUICHE GSO implementation.
if (udp_listener_config_->writer_factory_ == nullptr &&
Api::OsSysCallsSingleton::get().supportsUdpGso()) {
udp_listener_config_->writer_factory_ = std::make_unique<Quic::UdpGsoBatchWriterFactory>();
}
#endif
#else
throw EnvoyException("QUIC is configured but not enabled in the build.");
#endif
} else {
udp_listener_config_->listener_factory_ =
std::make_unique<Server::ActiveRawUdpListenerFactory>(concurrency);
}
if (udp_listener_config_->writer_factory_ == nullptr) {
udp_listener_config_->writer_factory_ = std::make_unique<Network::UdpDefaultWriterFactory>();
}
}
void ListenerImpl::buildListenSocketOptions() {
// The process-wide `signal()` handling may fail to handle SIGPIPE if overridden
// in the process (i.e., on a mobile client). Some OSes support handling it at the socket layer:
if (ENVOY_SOCKET_SO_NOSIGPIPE.hasValue()) {
addListenSocketOptions(Network::SocketOptionFactory::buildSocketNoSigpipeOptions());
}
if (PROTOBUF_GET_WRAPPED_OR_DEFAULT(config_, transparent, false)) {
addListenSocketOptions(Network::SocketOptionFactory::buildIpTransparentOptions());
}
if (PROTOBUF_GET_WRAPPED_OR_DEFAULT(config_, freebind, false)) {
addListenSocketOptions(Network::SocketOptionFactory::buildIpFreebindOptions());
}
if (reuse_port_) {
addListenSocketOptions(Network::SocketOptionFactory::buildReusePortOptions());
}
if (!config_.socket_options().empty()) {
addListenSocketOptions(
Network::SocketOptionFactory::buildLiteralOptions(config_.socket_options()));
}
if (socket_type_ == Network::Socket::Type::Datagram) {
// Needed for recvmsg to return destination address in IP header.
addListenSocketOptions(Network::SocketOptionFactory::buildIpPacketInfoOptions());
// Needed to return receive buffer overflown indicator.
addListenSocketOptions(Network::SocketOptionFactory::buildRxQueueOverFlowOptions());
// TODO(yugant) : Add a config option for UDP_GRO
if (Api::OsSysCallsSingleton::get().supportsUdpGro()) {
// Needed to receive gso_size option
addListenSocketOptions(Network::SocketOptionFactory::buildUdpGroOptions());
}
// Additional factory specific options.
ASSERT(udp_listener_config_->listener_factory_ != nullptr,
"buildUdpListenerFactory() must run first");
addListenSocketOptions(udp_listener_config_->listener_factory_->socketOptions());
}
}
void ListenerImpl::createListenerFilterFactories() {
if (!config_.listener_filters().empty()) {
switch (socket_type_) {
case Network::Socket::Type::Datagram:
udp_listener_filter_factories_ = parent_.factory_.createUdpListenerFilterFactoryList(
config_.listener_filters(), *listener_factory_context_);
break;
case Network::Socket::Type::Stream:
listener_filter_factories_ = parent_.factory_.createListenerFilterFactoryList(
config_.listener_filters(), *listener_factory_context_);
break;
}
}
}
void ListenerImpl::validateFilterChains() {
if (config_.filter_chains().empty() && !config_.has_default_filter_chain() &&
(socket_type_ == Network::Socket::Type::Stream ||
!udp_listener_config_->listener_factory_->isTransportConnectionless())) {
// If we got here, this is a tcp listener or connection-oriented udp listener, so ensure there
// is a filter chain specified
throw EnvoyException(
fmt::format("error adding listener '{}': no filter chains specified",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
} else if (udp_listener_config_ != nullptr &&
!udp_listener_config_->listener_factory_->isTransportConnectionless()) {
// Early fail if any filter chain doesn't have transport socket configured.
if (anyFilterChain(config_, [](const auto& filter_chain) {
return !filter_chain.has_transport_socket();
})) {
throw EnvoyException(
fmt::format("error adding listener '{}': no transport socket "
"specified for connection oriented UDP listener",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter())));
}
} else if ((!config_.filter_chains().empty() || config_.has_default_filter_chain()) &&
udp_listener_config_ != nullptr &&
udp_listener_config_->listener_factory_->isTransportConnectionless()) {
throw EnvoyException(fmt::format("error adding listener '{}': {} filter chain(s) specified for "
"connection-less UDP listener.",
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter()),
config_.filter_chains_size()));
}
}
void ListenerImpl::buildFilterChains() {
transport_factory_context_->setInitManager(*dynamic_init_manager_);
ListenerFilterChainFactoryBuilder builder(*this, *transport_factory_context_);
filter_chain_manager_->addFilterChains(
config_.has_filter_chain_matcher() ? &config_.filter_chain_matcher() : nullptr,
config_.filter_chains(),
config_.has_default_filter_chain() ? &config_.default_filter_chain() : nullptr, builder,
*filter_chain_manager_);
}
void ListenerImpl::buildConnectionBalancer(const Network::Address::Instance& address) {
auto iter = connection_balancers_.find(address.asString());
if (iter == connection_balancers_.end() && socket_type_ == Network::Socket::Type::Stream) {
#ifdef WIN32
// On Windows we use the exact connection balancer to dispatch connections
// from worker 1 to all workers. This is a perf hit but it is the only way
// to make all the workers do work.
// TODO(davinci26): We can be faster here if we create a balancer implementation
// that dispatches the connection to a random thread.
ENVOY_LOG(warn,
"ExactBalance was forced enabled for TCP listener '{}' because "
"Envoy is running on Windows."
"ExactBalance is used to load balance connections between workers on Windows.",
config_.name());
connection_balancers_.emplace(address.asString(),
std::make_shared<Network::ExactConnectionBalancerImpl>());
#else
// Not in place listener update.
if (config_.has_connection_balance_config()) {
switch (config_.connection_balance_config().balance_type_case()) {
case envoy::config::listener::v3::Listener_ConnectionBalanceConfig::kExactBalance: {
connection_balancers_.emplace(address.asString(),
std::make_shared<Network::ExactConnectionBalancerImpl>());
break;
}
case envoy::config::listener::v3::Listener_ConnectionBalanceConfig::kExtendBalance: {
const std::string connection_balance_library_type{TypeUtil::typeUrlToDescriptorFullName(
config_.connection_balance_config().extend_balance().typed_config().type_url())};
auto factory =
Envoy::Registry::FactoryRegistry<Network::ConnectionBalanceFactory>::getFactoryByType(
connection_balance_library_type);
if (factory == nullptr) {
throw EnvoyException(fmt::format("Didn't find a registered implementation for type: '{}'",
connection_balance_library_type));
}
connection_balancers_.emplace(
address.asString(),
factory->createConnectionBalancerFromProto(
config_.connection_balance_config().extend_balance(), *listener_factory_context_));
break;
}
case envoy::config::listener::v3::Listener_ConnectionBalanceConfig::BALANCE_TYPE_NOT_SET: {
throw EnvoyException("No valid balance type for connection balance");
}
}
} else {
connection_balancers_.emplace(address.asString(),
std::make_shared<Network::NopConnectionBalancerImpl>());
}
#endif
}
}
void ListenerImpl::buildSocketOptions() {
if (config_.has_tcp_fast_open_queue_length()) {
addListenSocketOptions(Network::SocketOptionFactory::buildTcpFastOpenOptions(
config_.tcp_fast_open_queue_length().value()));
}
}
void ListenerImpl::buildOriginalDstListenerFilter() {
// Add original dst listener filter if 'use_original_dst' flag is set.
if (PROTOBUF_GET_WRAPPED_OR_DEFAULT(config_, use_original_dst, false)) {
auto& factory =
Config::Utility::getAndCheckFactoryByName<Configuration::NamedListenerFilterConfigFactory>(
"envoy.filters.listener.original_dst");
Network::ListenerFilterFactoryCb callback = factory.createListenerFilterFactoryFromProto(
Envoy::ProtobufWkt::Empty(), nullptr, *listener_factory_context_);
auto* cfg_provider_manager = parent_.factory_.getTcpListenerConfigProviderManager();
auto filter_config_provider = cfg_provider_manager->createStaticFilterConfigProvider(
callback, "envoy.filters.listener.original_dst");
listener_filter_factories_.push_back(std::move(filter_config_provider));
}
}
void ListenerImpl::buildProxyProtocolListenerFilter() {
// Add proxy protocol listener filter if 'use_proxy_proto' flag is set.
// TODO(jrajahalme): This is the last listener filter on purpose. When filter chain matching
// is implemented, this needs to be run after the filter chain has been
// selected.
if (usesProxyProto(config_)) {
auto& factory =
Config::Utility::getAndCheckFactoryByName<Configuration::NamedListenerFilterConfigFactory>(
"envoy.filters.listener.proxy_protocol");
Network::ListenerFilterFactoryCb callback = factory.createListenerFilterFactoryFromProto(
envoy::extensions::filters::listener::proxy_protocol::v3::ProxyProtocol(), nullptr,
*listener_factory_context_);
auto* cfg_provider_manager = parent_.factory_.getTcpListenerConfigProviderManager();
auto filter_config_provider = cfg_provider_manager->createStaticFilterConfigProvider(
callback, "envoy.filters.listener.proxy_protocol");
listener_filter_factories_.push_back(std::move(filter_config_provider));
}
}
AccessLog::AccessLogManager& PerListenerFactoryContextImpl::accessLogManager() {
return listener_factory_context_base_->accessLogManager();
}
Upstream::ClusterManager& PerListenerFactoryContextImpl::clusterManager() {
return listener_factory_context_base_->clusterManager();
}
Event::Dispatcher& PerListenerFactoryContextImpl::mainThreadDispatcher() {
return listener_factory_context_base_->mainThreadDispatcher();
}
const Server::Options& PerListenerFactoryContextImpl::options() {
return listener_factory_context_base_->options();
}
Network::DrainDecision& PerListenerFactoryContextImpl::drainDecision() { PANIC("not implemented"); }
Grpc::Context& PerListenerFactoryContextImpl::grpcContext() {
return listener_factory_context_base_->grpcContext();
}
bool PerListenerFactoryContextImpl::healthCheckFailed() {
return listener_factory_context_base_->healthCheckFailed();
}
Http::Context& PerListenerFactoryContextImpl::httpContext() {
return listener_factory_context_base_->httpContext();
}
Router::Context& PerListenerFactoryContextImpl::routerContext() {
return listener_factory_context_base_->routerContext();
}
const LocalInfo::LocalInfo& PerListenerFactoryContextImpl::localInfo() const {
return listener_factory_context_base_->localInfo();
}
Envoy::Runtime::Loader& PerListenerFactoryContextImpl::runtime() {
return listener_factory_context_base_->runtime();
}
Stats::Scope& PerListenerFactoryContextImpl::scope() {
return listener_factory_context_base_->scope();
}
Singleton::Manager& PerListenerFactoryContextImpl::singletonManager() {
return listener_factory_context_base_->singletonManager();
}
OverloadManager& PerListenerFactoryContextImpl::overloadManager() {
return listener_factory_context_base_->overloadManager();
}
ThreadLocal::Instance& PerListenerFactoryContextImpl::threadLocal() {
return listener_factory_context_base_->threadLocal();
}
Admin& PerListenerFactoryContextImpl::admin() { return listener_factory_context_base_->admin(); }
const envoy::config::core::v3::Metadata& PerListenerFactoryContextImpl::listenerMetadata() const {
return listener_factory_context_base_->listenerMetadata();
};
const Envoy::Config::TypedMetadata& PerListenerFactoryContextImpl::listenerTypedMetadata() const {
return listener_factory_context_base_->listenerTypedMetadata();
}
envoy::config::core::v3::TrafficDirection PerListenerFactoryContextImpl::direction() const {
return listener_factory_context_base_->direction();
};
TimeSource& PerListenerFactoryContextImpl::timeSource() { return api().timeSource(); }
const Network::ListenerConfig& PerListenerFactoryContextImpl::listenerConfig() const {
return *listener_config_;
}
ProtobufMessage::ValidationContext& PerListenerFactoryContextImpl::messageValidationContext() {
return getServerFactoryContext().messageValidationContext();
}
ProtobufMessage::ValidationVisitor& PerListenerFactoryContextImpl::messageValidationVisitor() {
return listener_factory_context_base_->messageValidationVisitor();
}
Api::Api& PerListenerFactoryContextImpl::api() { return listener_factory_context_base_->api(); }
ServerLifecycleNotifier& PerListenerFactoryContextImpl::lifecycleNotifier() {
return listener_factory_context_base_->lifecycleNotifier();
}
ProcessContextOptRef PerListenerFactoryContextImpl::processContext() {
return listener_factory_context_base_->processContext();
}
Configuration::ServerFactoryContext&
PerListenerFactoryContextImpl::getServerFactoryContext() const {
return listener_factory_context_base_->getServerFactoryContext();
}
Configuration::TransportSocketFactoryContext&
PerListenerFactoryContextImpl::getTransportSocketFactoryContext() const {
return listener_factory_context_base_->getTransportSocketFactoryContext();
}
Stats::Scope& PerListenerFactoryContextImpl::listenerScope() {
return listener_factory_context_base_->listenerScope();
}
bool PerListenerFactoryContextImpl::isQuicListener() const {
return listener_factory_context_base_->isQuicListener();
}
Init::Manager& PerListenerFactoryContextImpl::initManager() { return listener_impl_.initManager(); }
bool ListenerImpl::createNetworkFilterChain(
Network::Connection& connection,
const std::vector<Network::FilterFactoryCb>& filter_factories) {
return Configuration::FilterChainUtility::buildFilterChain(connection, filter_factories);
}
bool ListenerImpl::createListenerFilterChain(Network::ListenerFilterManager& manager) {
if (Configuration::FilterChainUtility::buildFilterChain(manager, listener_filter_factories_)) {
return true;
} else {
ENVOY_LOG(debug, "New connection accepted while missing configuration. "
"Close socket and stop the iteration onAccept.");
missing_listener_config_stats_.extension_config_missing_.inc();
return false;
}
}
void ListenerImpl::createUdpListenerFilterChain(Network::UdpListenerFilterManager& manager,
Network::UdpReadFilterCallbacks& callbacks) {
Configuration::FilterChainUtility::buildUdpFilterChain(manager, callbacks,
udp_listener_filter_factories_);
}
void ListenerImpl::debugLog(const std::string& message) {
UNREFERENCED_PARAMETER(message);
ENVOY_LOG(debug, "{}: name={}, hash={}, tag={}, address={}", message, name_, hash_, listener_tag_,
absl::StrJoin(addresses_, ",", Network::AddressStrFormatter()));
}
void ListenerImpl::initialize() {
last_updated_ = listener_factory_context_->timeSource().systemTime();
// If workers have already started, we shift from using the global init manager to using a local
// per listener init manager. See ~ListenerImpl() for why we gate the onListenerWarmed() call
// by resetting the watcher.
if (workers_started_) {
ENVOY_LOG_MISC(debug, "Initialize listener {} local-init-manager.", name_);
// If workers_started_ is true, dynamic_init_manager_ should be initialized by listener
// manager directly.
dynamic_init_manager_->initialize(local_init_watcher_);
}
}
ListenerImpl::~ListenerImpl() {
if (!workers_started_) {
// We need to remove the listener_init_target_ handle from parent's initManager(), to unblock
// parent's initManager to get ready().
listener_init_target_.ready();
}
}
Init::Manager& ListenerImpl::initManager() { return *dynamic_init_manager_; }
void ListenerImpl::addSocketFactory(Network::ListenSocketFactoryPtr&& socket_factory) {
buildConnectionBalancer(*socket_factory->localAddress());
buildUdpListenerWorkerRouter(*socket_factory->localAddress(),
parent_.server_.options().concurrency());
socket_factories_.emplace_back(std::move(socket_factory));
}
bool ListenerImpl::supportUpdateFilterChain(const envoy::config::listener::v3::Listener& config,
bool worker_started) {
// The in place update needs the active listener in worker thread. worker_started guarantees the
// existence of that active listener.
if (!worker_started) {
return false;
}
// Full listener update currently rejects tcp listener having 0 filter chain.
// In place filter chain update could survive under zero filter chain but we should keep the
// same behavior for now. This also guards the below filter chain access.
if (config.filter_chains_size() == 0) {
return false;
}
// See buildProxyProtocolListenerFilter().
if (usesProxyProto(config_) ^ usesProxyProto(config)) {
return false;
}
return ListenerMessageUtil::filterChainOnlyChange(config_, config);
}
ListenerImplPtr
ListenerImpl::newListenerWithFilterChain(const envoy::config::listener::v3::Listener& config,
bool workers_started, uint64_t hash) {
// Use WrapUnique since the constructor is private.
return absl::WrapUnique(new ListenerImpl(*this, config, version_info_, parent_, name_,
added_via_api_,
/* new new workers started state */ workers_started,
/* use new hash */ hash));
}
void ListenerImpl::diffFilterChain(const ListenerImpl& another_listener,
std::function<void(Network::DrainableFilterChain&)> callback) {
for (const auto& message_and_filter_chain : filter_chain_manager_->filterChainsByMessage()) {
if (another_listener.filter_chain_manager_->filterChainsByMessage().find(
message_and_filter_chain.first) ==
another_listener.filter_chain_manager_->filterChainsByMessage().end()) {
// The filter chain exists in `this` listener but not in the listener passed in.
callback(*message_and_filter_chain.second);
}
}
// Filter chain manager maintains an optional default filter chain besides the filter chains
// indexed by message.
if (auto eq = MessageUtil();
filter_chain_manager_->defaultFilterChainMessage().has_value() &&
(!another_listener.filter_chain_manager_->defaultFilterChainMessage().has_value() ||