| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // 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 <string> |
| |
| #include "base/basictypes.h" |
| #include "base/logging.h" |
| #include "base/stringprintf.h" |
| #include "net/base/load_flags.h" |
| #include "net/http/http_proxy_client_socket_pool.h" |
| #include "net/http/http_request_info.h" |
| #include "net/http/http_stream_factory.h" |
| #include "net/proxy/proxy_info.h" |
| #include "net/socket/client_socket_handle.h" |
| #include "net/socket/socks_client_socket_pool.h" |
| #include "net/socket/ssl_client_socket_pool.h" |
| #include "net/socket/transport_client_socket_pool.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 |
| }; |
| |
| COMPILE_ASSERT(arraysize(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. 6 connections per group sounded too small |
| // for such use, thus we use a larger limit which was determined somewhat |
| // arbitrarily. |
| // TODO(yutak): Look at the usage and determine the right value after |
| // WebSocket protocol stack starts to work. |
| int g_max_sockets_per_group[] = { |
| 6, // NORMAL_SOCKET_POOL |
| 30 // WEBSOCKET_SOCKET_POOL |
| }; |
| |
| COMPILE_ASSERT(arraysize(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 server. This applies both to |
| // http and SOCKS proxies. See http://crbug.com/12066 and |
| // http://crbug.com/44501 for details about proxy server connection limits. |
| int g_max_sockets_per_proxy_server[] = { |
| kDefaultMaxSocketsPerProxyServer, // NORMAL_SOCKET_POOL |
| kDefaultMaxSocketsPerProxyServer // WEBSOCKET_SOCKET_POOL |
| }; |
| |
| COMPILE_ASSERT(arraysize(g_max_sockets_per_proxy_server) == |
| HttpNetworkSession::NUM_SOCKET_POOL_TYPES, |
| max_sockets_per_proxy_server_length_mismatch); |
| |
| // The meat of the implementation for the InitSocketHandleForHttpRequest, |
| // InitSocketHandleForRawConnect and PreconnectSocketsForHttpRequest methods. |
| int InitSocketPoolHelper(const GURL& request_url, |
| const HttpRequestHeaders& request_extra_headers, |
| int request_load_flags, |
| RequestPriority request_priority, |
| HttpNetworkSession* session, |
| const ProxyInfo& proxy_info, |
| bool force_spdy_over_ssl, |
| bool want_spdy_over_npn, |
| const SSLConfig& ssl_config_for_origin, |
| const SSLConfig& ssl_config_for_proxy, |
| bool force_tunnel, |
| const BoundNetLog& net_log, |
| int num_preconnect_streams, |
| ClientSocketHandle* socket_handle, |
| const OnHostResolutionCallback& resolution_callback, |
| const CompletionCallback& callback) { |
| scoped_refptr<TransportSocketParams> tcp_params; |
| scoped_refptr<HttpProxySocketParams> http_proxy_params; |
| scoped_refptr<SOCKSSocketParams> socks_params; |
| scoped_ptr<HostPortPair> proxy_host_port; |
| |
| bool using_ssl = request_url.SchemeIs("https") || force_spdy_over_ssl; |
| |
| HostPortPair origin_host_port = |
| HostPortPair(request_url.HostNoBrackets(), |
| request_url.EffectiveIntPort()); |
| |
| if (!using_ssl && session->params().testing_fixed_http_port != 0) { |
| origin_host_port.set_port(session->params().testing_fixed_http_port); |
| } else if (using_ssl && session->params().testing_fixed_https_port != 0) { |
| origin_host_port.set_port(session->params().testing_fixed_https_port); |
| } |
| |
| bool disable_resolver_cache = |
| request_load_flags & LOAD_BYPASS_CACHE || |
| request_load_flags & LOAD_VALIDATE_CACHE || |
| request_load_flags & LOAD_DISABLE_CACHE; |
| |
| int load_flags = request_load_flags; |
| if (session->params().ignore_certificate_errors) |
| load_flags |= LOAD_IGNORE_ALL_CERT_ERRORS; |
| |
| // Build the string used to uniquely identify connections of this type. |
| // Determine the host and port to connect to. |
| std::string connection_group = origin_host_port.ToString(); |
| DCHECK(!connection_group.empty()); |
| if (using_ssl) { |
| // All connections in a group should use the same SSLConfig settings. |
| // Encode version_max in the connection group's name, unless it's the |
| // default version_max. (We want the common case to use the shortest |
| // encoding). A version_max of TLS 1.1 is encoded as "ssl(max:3.2)/" |
| // rather than "tlsv1.1/" because the actual protocol version, which |
| // is selected by the server, may not be TLS 1.1. Do not encode |
| // version_min in the connection group's name because version_min |
| // should be the same for all connections, whereas version_max may |
| // change for version fallbacks. |
| std::string prefix = "ssl/"; |
| if (ssl_config_for_origin.version_max != |
| SSLConfigService::default_version_max()) { |
| switch (ssl_config_for_origin.version_max) { |
| case SSL_PROTOCOL_VERSION_TLS1_2: |
| prefix = "ssl(max:3.3)/"; |
| break; |
| case SSL_PROTOCOL_VERSION_TLS1_1: |
| prefix = "ssl(max:3.2)/"; |
| break; |
| case SSL_PROTOCOL_VERSION_TLS1: |
| prefix = "ssl(max:3.1)/"; |
| break; |
| case SSL_PROTOCOL_VERSION_SSL3: |
| prefix = "sslv3/"; |
| break; |
| default: |
| CHECK(false); |
| break; |
| } |
| } |
| connection_group = prefix + connection_group; |
| } |
| |
| bool ignore_limits = (request_load_flags & LOAD_IGNORE_LIMITS) != 0; |
| if (proxy_info.is_direct()) { |
| tcp_params = new TransportSocketParams(origin_host_port, |
| request_priority, |
| disable_resolver_cache, |
| ignore_limits, |
| resolution_callback); |
| } else { |
| ProxyServer proxy_server = proxy_info.proxy_server(); |
| proxy_host_port.reset(new HostPortPair(proxy_server.host_port_pair())); |
| scoped_refptr<TransportSocketParams> proxy_tcp_params( |
| new TransportSocketParams(*proxy_host_port, |
| request_priority, |
| disable_resolver_cache, |
| ignore_limits, |
| resolution_callback)); |
| |
| if (proxy_info.is_http() || proxy_info.is_https()) { |
| std::string user_agent; |
| request_extra_headers.GetHeader(HttpRequestHeaders::kUserAgent, |
| &user_agent); |
| scoped_refptr<SSLSocketParams> ssl_params; |
| if (proxy_info.is_https()) { |
| // Set ssl_params, and unset proxy_tcp_params |
| ssl_params = new SSLSocketParams(proxy_tcp_params, |
| NULL, |
| NULL, |
| ProxyServer::SCHEME_DIRECT, |
| *proxy_host_port.get(), |
| ssl_config_for_proxy, |
| load_flags, |
| force_spdy_over_ssl, |
| want_spdy_over_npn); |
| proxy_tcp_params = NULL; |
| } |
| |
| http_proxy_params = |
| new HttpProxySocketParams(proxy_tcp_params, |
| ssl_params, |
| request_url, |
| user_agent, |
| origin_host_port, |
| session->http_auth_cache(), |
| session->http_auth_handler_factory(), |
| session->spdy_session_pool(), |
| force_tunnel || using_ssl); |
| } else { |
| DCHECK(proxy_info.is_socks()); |
| char socks_version; |
| if (proxy_server.scheme() == ProxyServer::SCHEME_SOCKS5) |
| socks_version = '5'; |
| else |
| socks_version = '4'; |
| connection_group = base::StringPrintf( |
| "socks%c/%s", socks_version, connection_group.c_str()); |
| |
| socks_params = new SOCKSSocketParams(proxy_tcp_params, |
| socks_version == '5', |
| origin_host_port, |
| request_priority); |
| } |
| } |
| |
| // Deal with SSL - which layers on top of any given proxy. |
| if (using_ssl) { |
| scoped_refptr<SSLSocketParams> ssl_params = |
| new SSLSocketParams(tcp_params, |
| socks_params, |
| http_proxy_params, |
| proxy_info.proxy_server().scheme(), |
| origin_host_port, |
| ssl_config_for_origin, |
| load_flags, |
| force_spdy_over_ssl, |
| want_spdy_over_npn); |
| SSLClientSocketPool* ssl_pool = NULL; |
| if (proxy_info.is_direct()) { |
| ssl_pool = session->GetSSLSocketPool( |
| HttpNetworkSession::NORMAL_SOCKET_POOL); |
| } else { |
| ssl_pool = session->GetSocketPoolForSSLWithProxy( |
| HttpNetworkSession::NORMAL_SOCKET_POOL, |
| *proxy_host_port); |
| } |
| |
| if (num_preconnect_streams) { |
| RequestSocketsForPool(ssl_pool, connection_group, ssl_params, |
| num_preconnect_streams, net_log); |
| return OK; |
| } |
| |
| return socket_handle->Init(connection_group, ssl_params, |
| request_priority, callback, ssl_pool, |
| net_log); |
| } |
| |
| // Finally, get the connection started. |
| |
| if (proxy_info.is_http() || proxy_info.is_https()) { |
| HttpProxyClientSocketPool* pool = |
| session->GetSocketPoolForHTTPProxy( |
| HttpNetworkSession::NORMAL_SOCKET_POOL, |
| *proxy_host_port); |
| if (num_preconnect_streams) { |
| RequestSocketsForPool(pool, connection_group, http_proxy_params, |
| num_preconnect_streams, net_log); |
| return OK; |
| } |
| |
| return socket_handle->Init(connection_group, http_proxy_params, |
| request_priority, callback, |
| pool, net_log); |
| } |
| |
| if (proxy_info.is_socks()) { |
| SOCKSClientSocketPool* pool = |
| session->GetSocketPoolForSOCKSProxy( |
| HttpNetworkSession::NORMAL_SOCKET_POOL, |
| *proxy_host_port); |
| if (num_preconnect_streams) { |
| RequestSocketsForPool(pool, connection_group, socks_params, |
| num_preconnect_streams, net_log); |
| return OK; |
| } |
| |
| return socket_handle->Init(connection_group, socks_params, |
| request_priority, callback, pool, |
| net_log); |
| } |
| |
| DCHECK(proxy_info.is_direct()); |
| |
| TransportClientSocketPool* pool = |
| session->GetTransportSocketPool(HttpNetworkSession::NORMAL_SOCKET_POOL); |
| if (num_preconnect_streams) { |
| RequestSocketsForPool(pool, connection_group, tcp_params, |
| num_preconnect_streams, net_log); |
| return OK; |
| } |
| |
| return socket_handle->Init(connection_group, tcp_params, |
| request_priority, callback, |
| pool, net_log); |
| } |
| |
| } // namespace |
| |
| ClientSocketPoolManager::ClientSocketPoolManager() {} |
| ClientSocketPoolManager::~ClientSocketPoolManager() {} |
| |
| // 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_server[pool_type], |
| g_max_sockets_per_group[pool_type]); |
| } |
| |
| // static |
| int ClientSocketPoolManager::max_sockets_per_proxy_server( |
| HttpNetworkSession::SocketPoolType pool_type) { |
| DCHECK_LT(pool_type, HttpNetworkSession::NUM_SOCKET_POOL_TYPES); |
| return g_max_sockets_per_proxy_server[pool_type]; |
| } |
| |
| // static |
| void ClientSocketPoolManager::set_max_sockets_per_proxy_server( |
| 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 server. |
| DCHECK_LE(g_max_sockets_per_group[pool_type], socket_count); |
| g_max_sockets_per_proxy_server[pool_type] = socket_count; |
| } |
| |
| int InitSocketHandleForHttpRequest( |
| const GURL& request_url, |
| const HttpRequestHeaders& request_extra_headers, |
| int request_load_flags, |
| RequestPriority request_priority, |
| HttpNetworkSession* session, |
| const ProxyInfo& proxy_info, |
| bool force_spdy_over_ssl, |
| bool want_spdy_over_npn, |
| const SSLConfig& ssl_config_for_origin, |
| const SSLConfig& ssl_config_for_proxy, |
| const BoundNetLog& net_log, |
| ClientSocketHandle* socket_handle, |
| const OnHostResolutionCallback& resolution_callback, |
| const CompletionCallback& callback) { |
| DCHECK(socket_handle); |
| return InitSocketPoolHelper( |
| request_url, request_extra_headers, request_load_flags, request_priority, |
| session, proxy_info, force_spdy_over_ssl, want_spdy_over_npn, |
| ssl_config_for_origin, ssl_config_for_proxy, false, net_log, 0, |
| socket_handle, resolution_callback, callback); |
| } |
| |
| int InitSocketHandleForRawConnect( |
| const HostPortPair& host_port_pair, |
| HttpNetworkSession* session, |
| const ProxyInfo& proxy_info, |
| const SSLConfig& ssl_config_for_origin, |
| const SSLConfig& ssl_config_for_proxy, |
| const BoundNetLog& net_log, |
| ClientSocketHandle* socket_handle, |
| const CompletionCallback& callback) { |
| DCHECK(socket_handle); |
| // Synthesize an HttpRequestInfo. |
| GURL request_url = GURL("http://" + host_port_pair.ToString()); |
| HttpRequestHeaders request_extra_headers; |
| int request_load_flags = 0; |
| RequestPriority request_priority = MEDIUM; |
| |
| return InitSocketPoolHelper( |
| request_url, request_extra_headers, request_load_flags, request_priority, |
| session, proxy_info, false, false, ssl_config_for_origin, |
| ssl_config_for_proxy, true, net_log, 0, socket_handle, |
| OnHostResolutionCallback(), callback); |
| } |
| |
| int PreconnectSocketsForHttpRequest( |
| const GURL& request_url, |
| const HttpRequestHeaders& request_extra_headers, |
| int request_load_flags, |
| RequestPriority request_priority, |
| HttpNetworkSession* session, |
| const ProxyInfo& proxy_info, |
| bool force_spdy_over_ssl, |
| bool want_spdy_over_npn, |
| const SSLConfig& ssl_config_for_origin, |
| const SSLConfig& ssl_config_for_proxy, |
| const BoundNetLog& net_log, |
| int num_preconnect_streams) { |
| return InitSocketPoolHelper( |
| request_url, request_extra_headers, request_load_flags, request_priority, |
| session, proxy_info, force_spdy_over_ssl, want_spdy_over_npn, |
| ssl_config_for_origin, ssl_config_for_proxy, false, net_log, |
| num_preconnect_streams, NULL, OnHostResolutionCallback(), |
| CompletionCallback()); |
| } |
| |
| } // namespace net |
