chromium/net/dns/dns_session.h

// 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.

#ifndef NET_DNS_DNS_SESSION_H_
#define NET_DNS_DNS_SESSION_H_

#include <stdint.h>

#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "net/base/net_export.h"
#include "net/base/rand_callback.h"
#include "net/dns/dns_config.h"
#include "net/dns/dns_udp_tracker.h"

namespace net {

class NetLog;

// Session parameters and state shared between DnsTransactions for a specific
// instance/version of a DnsConfig. Also may be used as a key handle for
// per-session state stored elsewhere, e.g. in ResolveContext. A new DnsSession
// should be created for each new DnsConfig for DnsTransactions to be based on
// that new configuration.
//
// Ref-counted so that DnsTransactions can keep working in absence of
// DnsClient or continue operating on the same session after DnsClient has moved
// to a new DnsConfig/DnsSession.
class NET_EXPORT_PRIVATE DnsSession : public base::RefCounted<DnsSession> { … };

}  // namespace net

#endif  // NET_DNS_DNS_SESSION_H_