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// Copyright (c) 2010 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/spdy/spdy_session_pool.h"
#include "base/logging.h"
#include "base/values.h"
#include "net/http/http_network_session.h"
#include "net/spdy/spdy_session.h"
namespace net {
// The maximum number of sessions to open to a single domain.
static const size_t kMaxSessionsPerDomain = 1;
int SpdySessionPool::g_max_sessions_per_domain = kMaxSessionsPerDomain;
bool SpdySessionPool::g_force_single_domain = false;
SpdySessionPool::SpdySessionPool(SSLConfigService* ssl_config_service)
: ssl_config_service_(ssl_config_service) {
NetworkChangeNotifier::AddIPAddressObserver(this);
if (ssl_config_service_)
ssl_config_service_->AddObserver(this);
CertDatabase::AddObserver(this);
}
SpdySessionPool::~SpdySessionPool() {
CloseAllSessions();
if (ssl_config_service_)
ssl_config_service_->RemoveObserver(this);
NetworkChangeNotifier::RemoveIPAddressObserver(this);
CertDatabase::RemoveObserver(this);
}
scoped_refptr<SpdySession> SpdySessionPool::Get(
const HostPortProxyPair& host_port_proxy_pair,
const BoundNetLog& net_log) {
scoped_refptr<SpdySession> spdy_session;
SpdySessionList* list = GetSessionList(host_port_proxy_pair);
if (list) {
if (list->size() >= static_cast<unsigned int>(g_max_sessions_per_domain)) {
spdy_session = list->front();
list->pop_front();
net_log.AddEvent(
NetLog::TYPE_SPDY_SESSION_POOL_FOUND_EXISTING_SESSION,
make_scoped_refptr(new NetLogSourceParameter(
"session", spdy_session->net_log().source())));
}
} else {
list = AddSessionList(host_port_proxy_pair);
}
DCHECK(list);
if (!spdy_session) {
spdy_session = new SpdySession(host_port_proxy_pair, this, &spdy_settings_,
net_log.net_log());
net_log.AddEvent(
NetLog::TYPE_SPDY_SESSION_POOL_CREATED_NEW_SESSION,
make_scoped_refptr(new NetLogSourceParameter(
"session", spdy_session->net_log().source())));
}
DCHECK(spdy_session);
list->push_back(spdy_session);
DCHECK_LE(list->size(), static_cast<unsigned int>(g_max_sessions_per_domain));
return spdy_session;
}
net::Error SpdySessionPool::GetSpdySessionFromSocket(
const HostPortProxyPair& host_port_proxy_pair,
ClientSocketHandle* connection,
const BoundNetLog& net_log,
int certificate_error_code,
scoped_refptr<SpdySession>* spdy_session,
bool is_secure) {
// Create the SPDY session and add it to the pool.
*spdy_session = new SpdySession(host_port_proxy_pair, this, &spdy_settings_,
net_log.net_log());
SpdySessionList* list = GetSessionList(host_port_proxy_pair);
if (!list)
list = AddSessionList(host_port_proxy_pair);
DCHECK(list->empty());
list->push_back(*spdy_session);
net_log.AddEvent(
NetLog::TYPE_SPDY_SESSION_POOL_IMPORTED_SESSION_FROM_SOCKET,
make_scoped_refptr(new NetLogSourceParameter(
"session", (*spdy_session)->net_log().source())));
// Now we can initialize the session with the SSL socket.
return (*spdy_session)->InitializeWithSocket(connection, is_secure,
certificate_error_code);
}
bool SpdySessionPool::HasSession(
const HostPortProxyPair& host_port_proxy_pair) const {
if (GetSessionList(host_port_proxy_pair))
return true;
return false;
}
void SpdySessionPool::Remove(const scoped_refptr<SpdySession>& session) {
SpdySessionList* list = GetSessionList(session->host_port_proxy_pair());
DCHECK(list); // We really shouldn't remove if we've already been removed.
if (!list)
return;
list->remove(session);
session->net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_POOL_REMOVE_SESSION,
make_scoped_refptr(new NetLogSourceParameter(
"session", session->net_log().source())));
if (list->empty())
RemoveSessionList(session->host_port_proxy_pair());
}
Value* SpdySessionPool::SpdySessionPoolInfoToValue() const {
ListValue* list = new ListValue();
SpdySessionsMap::const_iterator spdy_session_pool_it = sessions_.begin();
for (SpdySessionsMap::const_iterator it = sessions_.begin();
it != sessions_.end(); ++it) {
SpdySessionList* sessions = it->second;
for (SpdySessionList::const_iterator session = sessions->begin();
session != sessions->end(); ++session) {
list->Append(session->get()->GetInfoAsValue());
}
}
return list;
}
void SpdySessionPool::OnIPAddressChanged() {
CloseCurrentSessions();
}
void SpdySessionPool::OnSSLConfigChanged() {
CloseCurrentSessions();
}
void SpdySessionPool::OnUserCertAdded(X509Certificate* cert) {
CloseCurrentSessions();
}
const HostPortProxyPair& SpdySessionPool::NormalizeListPair(
const HostPortProxyPair& host_port_proxy_pair) const {
if (!g_force_single_domain)
return host_port_proxy_pair;
static HostPortProxyPair* single_domain_pair = NULL;
if (!single_domain_pair) {
HostPortPair single_domain = HostPortPair("singledomain.com", 80);
single_domain_pair = new HostPortProxyPair(single_domain,
ProxyServer::Direct());
}
return *single_domain_pair;
}
SpdySessionPool::SpdySessionList*
SpdySessionPool::AddSessionList(
const HostPortProxyPair& host_port_proxy_pair) {
const HostPortProxyPair& pair = NormalizeListPair(host_port_proxy_pair);
DCHECK(sessions_.find(pair) == sessions_.end());
SpdySessionPool::SpdySessionList* list = new SpdySessionList();
sessions_[pair] = list;
return list;
}
SpdySessionPool::SpdySessionList*
SpdySessionPool::GetSessionList(
const HostPortProxyPair& host_port_proxy_pair) const {
const HostPortProxyPair& pair = NormalizeListPair(host_port_proxy_pair);
SpdySessionsMap::const_iterator it = sessions_.find(pair);
if (it == sessions_.end())
return NULL;
return it->second;
}
void SpdySessionPool::RemoveSessionList(
const HostPortProxyPair& host_port_proxy_pair) {
const HostPortProxyPair& pair = NormalizeListPair(host_port_proxy_pair);
SpdySessionList* list = GetSessionList(pair);
if (list) {
delete list;
sessions_.erase(pair);
} else {
DCHECK(false) << "removing orphaned session list";
}
}
void SpdySessionPool::CloseAllSessions() {
while (!sessions_.empty()) {
SpdySessionList* list = sessions_.begin()->second;
CHECK(list);
const scoped_refptr<SpdySession>& session = list->front();
CHECK(session);
// This call takes care of removing the session from the pool, as well as
// removing the session list if the list is empty.
session->CloseSessionOnError(net::ERR_ABORTED, true);
}
}
void SpdySessionPool::CloseCurrentSessions() {
SpdySessionsMap old_map;
old_map.swap(sessions_);
for (SpdySessionsMap::const_iterator it = old_map.begin();
it != old_map.end(); ++it) {
SpdySessionList* list = it->second;
CHECK(list);
const scoped_refptr<SpdySession>& session = list->front();
CHECK(session);
session->set_spdy_session_pool(NULL);
}
while (!old_map.empty()) {
SpdySessionList* list = old_map.begin()->second;
CHECK(list);
const scoped_refptr<SpdySession>& session = list->front();
CHECK(session);
session->CloseSessionOnError(net::ERR_ABORTED, false);
list->pop_front();
if (list->empty()) {
delete list;
old_map.erase(old_map.begin()->first);
}
}
}
} // namespace net
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