blob: b88b2ddae41a74ec4853735ab65c7692a23898c7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* 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
|
