// Copyright 2012 The Chromium Authors // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "net/socket/client_socket_pool_manager.h" #include #include #include #include #include "base/check_op.h" #include "base/metrics/field_trial_params.h" #include "base/numerics/safe_conversions.h" #include "build/build_config.h" #include "net/base/load_flags.h" #include "net/base/proxy_chain.h" #include "net/base/proxy_server.h" #include "net/dns/public/secure_dns_policy.h" #include "net/http/http_stream_factory.h" #include "net/proxy_resolution/proxy_info.h" #include "net/socket/client_socket_handle.h" #include "net/socket/client_socket_pool.h" #include "net/socket/connect_job.h" #include "net/ssl/ssl_config.h" #include "url/gurl.h" #include "url/scheme_host_port.h" #include "url/url_constants.h" namespace net { namespace { static constexpr size_t kSocketPoolTypesSize = std::to_underlying(HttpNetworkSession::SocketPoolType::kMaxValue) + 1; // The soft limit for active sockets per pool for this network process. This may // be modified by set_socket_soft_cap_per_pool in tests, but should otherwise be // as stated below. std::array g_socket_soft_cap_per_pool = std::to_array({ 256, // kNormal 256 // kWebSocket }); // Default to allow up to 6 connections per host. Experiment and tuning may // try other values (greater than 0). Too large may cause many problems, such // as home routers blocking the connections!?!? See http://crbug.com/12066. // // WebSocket connections are long-lived, and should be treated differently // than normal other connections. Use a limit of 255, so the limit for wss will // be the same as the limit for ws. Also note that Firefox uses a limit of 200. // See http://crbug.com/486800 std::array g_max_sockets_per_group = std::to_array({ 6, // kNormal 255 // kWebSocket }); // Returns the limit for active connections through a specific proxy chain for // this network process. `set_max_sockets_per_proxy_chain` can modify this. std::array g_max_sockets_per_proxy_chain = std::to_array({ 128, // kNormal 128 // kWebSocket }); bool g_allow_size_randomization_for_proxy = true; // TODO(crbug.com/40609237) In order to resolve longstanding issues // related to pooling distinguishable sockets together, get rid of SocketParams // entirely. scoped_refptr CreateSocketParams( const ClientSocketPool::GroupId& group_id, const std::vector& allowed_bad_certs) { bool using_ssl = GURL::SchemeIsCryptographic(group_id.destination().scheme()); return base::MakeRefCounted( using_ssl ? allowed_bad_certs : std::vector()); } int InitSocketPoolHelper( url::SchemeHostPort endpoint, int request_load_flags, RequestPriority request_priority, HttpNetworkSession* session, const ProxyInfo& proxy_info, const std::vector& allowed_bad_certs, PrivacyMode privacy_mode, NetworkAnonymizationKey network_anonymization_key, SecureDnsPolicy secure_dns_policy, const SocketTag& socket_tag, handles::NetworkHandle target_network, const NetLogWithSource& net_log, int num_preconnect_streams, ClientSocketHandle* socket_handle, HttpNetworkSession::SocketPoolType socket_pool_type, CompletionOnceCallback callback, const ClientSocketPool::ProxyAuthCallback& proxy_auth_callback, ClientSocketPool::PreconnectCompletionCallback preconnect_callback) { DCHECK(endpoint.IsValid()); session->ApplyTestingFixedPort(endpoint); bool disable_cert_network_fetches = !!(request_load_flags & LOAD_DISABLE_CERT_NETWORK_FETCHES); ClientSocketPool::GroupId connection_group( std::move(endpoint), privacy_mode, std::move(network_anonymization_key), secure_dns_policy, disable_cert_network_fetches, target_network); scoped_refptr socket_params = CreateSocketParams(connection_group, allowed_bad_certs); ClientSocketPool* pool = session->GetSocketPool(socket_pool_type, proxy_info.proxy_chain()); ClientSocketPool::RespectLimits respect_limits = ClientSocketPool::RespectLimits::ENABLED; if ((request_load_flags & LOAD_IGNORE_LIMITS) != 0) respect_limits = ClientSocketPool::RespectLimits::DISABLED; std::optional proxy_annotation = proxy_info.is_direct() ? std::nullopt : std::optional( proxy_info.traffic_annotation()); if (num_preconnect_streams) { return pool->RequestSockets(connection_group, std::move(socket_params), proxy_annotation, num_preconnect_streams, std::move(preconnect_callback), net_log); } return socket_handle->Init(connection_group, std::move(socket_params), proxy_annotation, request_priority, socket_tag, respect_limits, std::move(callback), proxy_auth_callback, pool, net_log); } } // namespace ClientSocketPoolManager::ClientSocketPoolManager() = default; ClientSocketPoolManager::~ClientSocketPoolManager() = default; // static size_t ClientSocketPoolManager::socket_soft_cap_per_pool( HttpNetworkSession::SocketPoolType pool_type) { return g_socket_soft_cap_per_pool[std::to_underlying(pool_type)]; } // static void ClientSocketPoolManager::set_socket_soft_cap_per_pool_for_test( HttpNetworkSession::SocketPoolType pool_type, size_t socket_count) { DCHECK_LT(0u, socket_count); // At least one socket must be allowed. DCHECK_GE(2048u, socket_count); // For now, we pick a ceiling of 2^11. g_socket_soft_cap_per_pool[std::to_underlying(pool_type)] = socket_count; DCHECK_GE(g_socket_soft_cap_per_pool[std::to_underlying(pool_type)], g_max_sockets_per_group[std::to_underlying(pool_type)]); } // static size_t ClientSocketPoolManager::max_sockets_per_group( HttpNetworkSession::SocketPoolType pool_type) { return g_max_sockets_per_group[std::to_underlying(pool_type)]; } // static void ClientSocketPoolManager::set_max_sockets_per_group_for_test( HttpNetworkSession::SocketPoolType pool_type, size_t socket_count) { DCHECK_LT(0u, socket_count); // At least one socket must be allowed. DCHECK_GE(512u, socket_count); // For now, we pick a ceiling of 2^9. g_max_sockets_per_group[std::to_underlying(pool_type)] = socket_count; DCHECK_GE(g_socket_soft_cap_per_pool[std::to_underlying(pool_type)], g_max_sockets_per_group[std::to_underlying(pool_type)]); DCHECK_GE(g_max_sockets_per_proxy_chain[std::to_underlying(pool_type)], g_max_sockets_per_group[std::to_underlying(pool_type)]); } // static size_t ClientSocketPoolManager::max_sockets_per_proxy_chain( HttpNetworkSession::SocketPoolType pool_type) { return g_max_sockets_per_proxy_chain[std::to_underlying(pool_type)]; } // static bool ClientSocketPoolManager::allow_size_randomization_for_proxy() { return g_allow_size_randomization_for_proxy; } // static void ClientSocketPoolManager::set_max_sockets_per_proxy_chain( HttpNetworkSession::SocketPoolType pool_type, size_t socket_count) { // LINT.IfChange(set_max_sockets_per_proxy_chain) // We set out explicit limits here because they are hard coded in the // enterprise policy MaxConnectionsPerProxy. CHECK_GE(socket_count, 6u); CHECK_LE(socket_count, 256u); // LINT.ThenChange(/net/socket/client_socket_pool_manager.cc:SetMaxConnectionsPerProxyChain) g_max_sockets_per_proxy_chain[std::to_underlying(pool_type)] = socket_count; } // static void ClientSocketPoolManager::set_allow_size_randomization_for_proxy( bool allow) { g_allow_size_randomization_for_proxy = allow; } // static base::TimeDelta ClientSocketPoolManager::unused_idle_socket_timeout( HttpNetworkSession::SocketPoolType pool_type) { constexpr int kPreconnectIntervalSec = 60; return base::Seconds(kPreconnectIntervalSec); } int InitSocketHandleForHttpRequest( url::SchemeHostPort endpoint, int request_load_flags, RequestPriority request_priority, HttpNetworkSession* session, const ProxyInfo& proxy_info, const std::vector& allowed_bad_certs, PrivacyMode privacy_mode, NetworkAnonymizationKey network_anonymization_key, SecureDnsPolicy secure_dns_policy, const SocketTag& socket_tag, handles::NetworkHandle target_network, const NetLogWithSource& net_log, ClientSocketHandle* socket_handle, CompletionOnceCallback callback, const ClientSocketPool::ProxyAuthCallback& proxy_auth_callback) { DCHECK(socket_handle); return InitSocketPoolHelper( std::move(endpoint), request_load_flags, request_priority, session, proxy_info, allowed_bad_certs, privacy_mode, std::move(network_anonymization_key), secure_dns_policy, socket_tag, target_network, net_log, 0, socket_handle, HttpNetworkSession::SocketPoolType::kNormal, std::move(callback), proxy_auth_callback, ClientSocketPool::PreconnectCompletionCallback()); } int InitSocketHandleForWebSocketRequest( url::SchemeHostPort endpoint, int request_load_flags, RequestPriority request_priority, HttpNetworkSession* session, const ProxyInfo& proxy_info, const std::vector& allowed_bad_certs, PrivacyMode privacy_mode, NetworkAnonymizationKey network_anonymization_key, handles::NetworkHandle target_network, const NetLogWithSource& net_log, ClientSocketHandle* socket_handle, CompletionOnceCallback callback, const ClientSocketPool::ProxyAuthCallback& proxy_auth_callback) { DCHECK(socket_handle); // QUIC proxies are currently not supported through this method. DCHECK(proxy_info.is_direct() || !proxy_info.proxy_chain().Last().is_quic()); // Expect websocket schemes (ws and wss) to be converted to the http(s) // equivalent. DCHECK(endpoint.scheme() == url::kHttpScheme || endpoint.scheme() == url::kHttpsScheme); return InitSocketPoolHelper( std::move(endpoint), request_load_flags, request_priority, session, proxy_info, allowed_bad_certs, privacy_mode, std::move(network_anonymization_key), SecureDnsPolicy::kAllow, SocketTag(), target_network, net_log, 0, socket_handle, HttpNetworkSession::SocketPoolType::kWebSocket, std::move(callback), proxy_auth_callback, ClientSocketPool::PreconnectCompletionCallback()); } int PreconnectSocketsForHttpRequest( url::SchemeHostPort endpoint, int request_load_flags, RequestPriority request_priority, HttpNetworkSession* session, const ProxyInfo& proxy_info, const std::vector& allowed_bad_certs, PrivacyMode privacy_mode, NetworkAnonymizationKey network_anonymization_key, SecureDnsPolicy secure_dns_policy, handles::NetworkHandle target_network, const NetLogWithSource& net_log, int num_preconnect_streams, ClientSocketPool::PreconnectCompletionCallback callback) { // Expect websocket schemes (ws and wss) to be converted to the http(s) // equivalent. DCHECK(endpoint.scheme() == url::kHttpScheme || endpoint.scheme() == url::kHttpsScheme); return InitSocketPoolHelper( std::move(endpoint), request_load_flags, request_priority, session, proxy_info, allowed_bad_certs, privacy_mode, std::move(network_anonymization_key), secure_dns_policy, SocketTag(), target_network, net_log, num_preconnect_streams, nullptr, HttpNetworkSession::SocketPoolType::kNormal, CompletionOnceCallback(), ClientSocketPool::ProxyAuthCallback(), std::move(callback)); } } // namespace net