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// 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 <memory>
#include <utility>
#include "base/check_op.h"
#include "base/metrics/field_trial_params.h"
#include "base/strings/string_piece.h"
#include "build/build_config.h"
#include "net/base/features.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 "third_party/abseil-cpp/absl/types/optional.h"
#include "url/gurl.h"
#include "url/scheme_host_port.h"
#include "url/url_constants.h"
namespace net {
namespace {
// Limit of sockets of each socket pool.
int g_max_sockets_per_pool[] = {
256, // NORMAL_SOCKET_POOL
256 // WEBSOCKET_SOCKET_POOL
};
static_assert(std::size(g_max_sockets_per_pool) ==
HttpNetworkSession::NUM_SOCKET_POOL_TYPES,
"max sockets per pool length mismatch");
// 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
int g_max_sockets_per_group[] = {
6, // NORMAL_SOCKET_POOL
255 // WEBSOCKET_SOCKET_POOL
};
static_assert(std::size(g_max_sockets_per_group) ==
HttpNetworkSession::NUM_SOCKET_POOL_TYPES,
"max sockets per group length mismatch");
// The max number of sockets to allow per proxy chain. This applies both to
// http and SOCKS proxies. See http://crbug.com/12066 and
// http://crbug.com/44501 for details about proxy chain connection limits.
int g_max_sockets_per_proxy_chain[] = {
kDefaultMaxSocketsPerProxyChain, // NORMAL_SOCKET_POOL
kDefaultMaxSocketsPerProxyChain // WEBSOCKET_SOCKET_POOL
};
static_assert(std::size(g_max_sockets_per_proxy_chain) ==
HttpNetworkSession::NUM_SOCKET_POOL_TYPES,
"max sockets per proxy chain length mismatch");
// TODO(https://crbug.com/921369) In order to resolve longstanding issues
// related to pooling distinguishable sockets together, get rid of SocketParams
// entirely.
scoped_refptr<ClientSocketPool::SocketParams> CreateSocketParams(
const ClientSocketPool::GroupId& group_id,
const ProxyChain& proxy_chain,
const SSLConfig& ssl_config_for_origin,
const SSLConfig& ssl_config_for_proxy) {
bool using_ssl = GURL::SchemeIsCryptographic(group_id.destination().scheme());
bool using_proxy_ssl = proxy_chain.proxy_server().is_secure_http_like();
return base::MakeRefCounted<ClientSocketPool::SocketParams>(
using_ssl ? std::make_unique<SSLConfig>(ssl_config_for_origin) : nullptr,
using_proxy_ssl ? std::make_unique<SSLConfig>(ssl_config_for_proxy)
: nullptr);
}
int InitSocketPoolHelper(
url::SchemeHostPort endpoint,
int request_load_flags,
RequestPriority request_priority,
HttpNetworkSession* session,
const ProxyInfo& proxy_info,
const SSLConfig& ssl_config_for_origin,
const SSLConfig& ssl_config_for_proxy,
bool is_for_websockets,
PrivacyMode privacy_mode,
NetworkAnonymizationKey network_anonymization_key,
SecureDnsPolicy secure_dns_policy,
const SocketTag& socket_tag,
const NetLogWithSource& net_log,
int num_preconnect_streams,
ClientSocketHandle* socket_handle,
HttpNetworkSession::SocketPoolType socket_pool_type,
CompletionOnceCallback callback,
const ClientSocketPool::ProxyAuthCallback& proxy_auth_callback) {
DCHECK(endpoint.IsValid());
bool using_ssl = GURL::SchemeIsCryptographic(endpoint.scheme());
if (!using_ssl && session->params().testing_fixed_http_port != 0) {
endpoint = url::SchemeHostPort(endpoint.scheme(), endpoint.host(),
session->params().testing_fixed_http_port);
} else if (using_ssl && session->params().testing_fixed_https_port != 0) {
endpoint = url::SchemeHostPort(endpoint.scheme(), endpoint.host(),
session->params().testing_fixed_https_port);
}
ClientSocketPool::GroupId connection_group(
std::move(endpoint), privacy_mode, std::move(network_anonymization_key),
secure_dns_policy);
scoped_refptr<ClientSocketPool::SocketParams> socket_params =
CreateSocketParams(connection_group, proxy_info.proxy_chain(),
ssl_config_for_origin, ssl_config_for_proxy);
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;
absl::optional<NetworkTrafficAnnotationTag> proxy_annotation =
proxy_info.is_direct() ? absl::nullopt
: absl::optional<NetworkTrafficAnnotationTag>(
proxy_info.traffic_annotation());
if (num_preconnect_streams) {
return pool->RequestSockets(connection_group, std::move(socket_params),
proxy_annotation, num_preconnect_streams,
std::move(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
int ClientSocketPoolManager::max_sockets_per_pool(
HttpNetworkSession::SocketPoolType pool_type) {
DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES);
return g_max_sockets_per_pool[pool_type];
}
// static
void ClientSocketPoolManager::set_max_sockets_per_pool(
HttpNetworkSession::SocketPoolType pool_type,
int socket_count) {
DCHECK_LT(0, socket_count);
DCHECK_GT(1000, socket_count); // Sanity check.
DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES);
g_max_sockets_per_pool[pool_type] = socket_count;
DCHECK_GE(g_max_sockets_per_pool[pool_type],
g_max_sockets_per_group[pool_type]);
}
// static
int ClientSocketPoolManager::max_sockets_per_group(
HttpNetworkSession::SocketPoolType pool_type) {
DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES);
return g_max_sockets_per_group[pool_type];
}
// static
void ClientSocketPoolManager::set_max_sockets_per_group(
HttpNetworkSession::SocketPoolType pool_type,
int socket_count) {
DCHECK_LT(0, socket_count);
// The following is a sanity check... but we should NEVER be near this value.
DCHECK_GT(100, socket_count);
DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES);
g_max_sockets_per_group[pool_type] = socket_count;
DCHECK_GE(g_max_sockets_per_pool[pool_type],
g_max_sockets_per_group[pool_type]);
DCHECK_GE(g_max_sockets_per_proxy_chain[pool_type],
g_max_sockets_per_group[pool_type]);
}
// static
int ClientSocketPoolManager::max_sockets_per_proxy_chain(
HttpNetworkSession::SocketPoolType pool_type) {
DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES);
return g_max_sockets_per_proxy_chain[pool_type];
}
// static
void ClientSocketPoolManager::set_max_sockets_per_proxy_chain(
HttpNetworkSession::SocketPoolType pool_type,
int socket_count) {
DCHECK_LT(0, socket_count);
DCHECK_GT(100, socket_count); // Sanity check.
DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES);
// Assert this case early on. The max number of sockets per group cannot
// exceed the max number of sockets per proxy chain.
DCHECK_LE(g_max_sockets_per_group[pool_type], socket_count);
g_max_sockets_per_proxy_chain[pool_type] = socket_count;
}
// static
base::TimeDelta ClientSocketPoolManager::unused_idle_socket_timeout(
HttpNetworkSession::SocketPoolType pool_type) {
return base::Seconds(base::GetFieldTrialParamByFeatureAsInt(
net::features::kNetUnusedIdleSocketTimeout,
"unused_idle_socket_timeout_seconds", 60));
}
int InitSocketHandleForHttpRequest(
url::SchemeHostPort endpoint,
int request_load_flags,
RequestPriority request_priority,
HttpNetworkSession* session,
const ProxyInfo& proxy_info,
const SSLConfig& ssl_config_for_origin,
const SSLConfig& ssl_config_for_proxy,
PrivacyMode privacy_mode,
NetworkAnonymizationKey network_anonymization_key,
SecureDnsPolicy secure_dns_policy,
const SocketTag& socket_tag,
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, ssl_config_for_origin, ssl_config_for_proxy,
false /* is_for_websockets */, privacy_mode,
std::move(network_anonymization_key), secure_dns_policy, socket_tag,
net_log, 0, socket_handle, HttpNetworkSession::NORMAL_SOCKET_POOL,
std::move(callback), proxy_auth_callback);
}
int InitSocketHandleForWebSocketRequest(
url::SchemeHostPort endpoint,
int request_load_flags,
RequestPriority request_priority,
HttpNetworkSession* session,
const ProxyInfo& proxy_info,
const SSLConfig& ssl_config_for_origin,
const SSLConfig& ssl_config_for_proxy,
PrivacyMode privacy_mode,
NetworkAnonymizationKey network_anonymization_key,
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_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, ssl_config_for_origin, ssl_config_for_proxy,
true /* is_for_websockets */, privacy_mode,
std::move(network_anonymization_key), SecureDnsPolicy::kAllow,
SocketTag(), net_log, 0, socket_handle,
HttpNetworkSession::WEBSOCKET_SOCKET_POOL, std::move(callback),
proxy_auth_callback);
}
int PreconnectSocketsForHttpRequest(
url::SchemeHostPort endpoint,
int request_load_flags,
RequestPriority request_priority,
HttpNetworkSession* session,
const ProxyInfo& proxy_info,
const SSLConfig& ssl_config_for_origin,
const SSLConfig& ssl_config_for_proxy,
PrivacyMode privacy_mode,
NetworkAnonymizationKey network_anonymization_key,
SecureDnsPolicy secure_dns_policy,
const NetLogWithSource& net_log,
int num_preconnect_streams,
CompletionOnceCallback callback) {
// QUIC proxies are currently not supported through this method.
DCHECK(!proxy_info.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, ssl_config_for_origin, ssl_config_for_proxy,
false /* force_tunnel */, privacy_mode,
std::move(network_anonymization_key), secure_dns_policy, SocketTag(),
net_log, num_preconnect_streams, nullptr,
HttpNetworkSession::NORMAL_SOCKET_POOL, std::move(callback),
ClientSocketPool::ProxyAuthCallback());
}
} // namespace net
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