You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.3 KiB
77 lines
2.3 KiB
/*
|
|
* Copyright (C) 2018 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "DnsTlsSessionCache.h"
|
|
|
|
#define LOG_TAG "resolv"
|
|
|
|
#include <android-base/logging.h>
|
|
|
|
namespace android {
|
|
namespace net {
|
|
|
|
bool DnsTlsSessionCache::prepareSsl(SSL* ssl) {
|
|
// Add this cache as the 0-index extra data for the socket.
|
|
// This is used by newSessionCallback.
|
|
int ret = SSL_set_ex_data(ssl, 0, this);
|
|
return ret == 1;
|
|
}
|
|
|
|
void DnsTlsSessionCache::prepareSslContext(SSL_CTX* ssl_ctx) {
|
|
SSL_CTX_set_session_cache_mode(ssl_ctx, SSL_SESS_CACHE_CLIENT);
|
|
SSL_CTX_sess_set_new_cb(ssl_ctx, &DnsTlsSessionCache::newSessionCallback);
|
|
}
|
|
|
|
// static
|
|
int DnsTlsSessionCache::newSessionCallback(SSL* ssl, SSL_SESSION* session) {
|
|
if (!ssl || !session) {
|
|
LOG(ERROR) << "Null SSL object in new session callback";
|
|
return 0;
|
|
}
|
|
DnsTlsSessionCache* cache = reinterpret_cast<DnsTlsSessionCache*>(
|
|
SSL_get_ex_data(ssl, 0));
|
|
if (!cache) {
|
|
LOG(ERROR) << "null transport in new session callback";
|
|
return 0;
|
|
}
|
|
LOG(DEBUG) << "Recording session";
|
|
cache->recordSession(session);
|
|
return 1; // Increment the refcount of session.
|
|
}
|
|
|
|
void DnsTlsSessionCache::recordSession(SSL_SESSION* session) {
|
|
std::lock_guard guard(mLock);
|
|
mSessions.emplace_front(session);
|
|
if (mSessions.size() > kMaxSize) {
|
|
LOG(DEBUG) << "Too many sessions; trimming";
|
|
mSessions.pop_back();
|
|
}
|
|
}
|
|
|
|
bssl::UniquePtr<SSL_SESSION> DnsTlsSessionCache::getSession() {
|
|
std::lock_guard guard(mLock);
|
|
if (mSessions.size() == 0) {
|
|
LOG(DEBUG) << "No known sessions";
|
|
return nullptr;
|
|
}
|
|
bssl::UniquePtr<SSL_SESSION> ret = std::move(mSessions.front());
|
|
mSessions.pop_front();
|
|
return ret;
|
|
}
|
|
|
|
} // end of namespace net
|
|
} // end of namespace android
|