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// 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.
#ifndef CHROME_BROWSER_NET_DNS_PROBE_JOB_H_
#define CHROME_BROWSER_NET_DNS_PROBE_JOB_H_
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/memory/scoped_ptr.h"
namespace net {
class DnsClient;
class NetLog;
}
namespace chrome_browser_net {
// A job to probe the health of a DNS configuration.
class DnsProbeJob {
public:
enum Result {
SERVERS_UNKNOWN,
SERVERS_CORRECT, // Server responds with correct answers.
SERVERS_INCORRECT, // Server responds with success but incorrect answer.
// TODO(ttuttle): Do we want an "unreliable" result, for e.g. servers that
// lie about NXDOMAIN?
SERVERS_FAILING, // Server responds with errors.
SERVERS_UNREACHABLE, // Server doesn't respond (or never got our packets)
MAX_RESULT
};
typedef base::Callback<void(DnsProbeJob* job, Result result)> CallbackType;
virtual ~DnsProbeJob() { }
// Creates and starts a probe job.
//
// |dns_client| should be a DnsClient with the DnsConfig already set.
// |callback| will be called when the probe finishes, which may happen
// before the constructor returns (for example, if we can't create the DNS
// transactions).
static scoped_ptr<DnsProbeJob> CreateJob(
scoped_ptr<net::DnsClient> dns_client,
const CallbackType& callback,
net::NetLog* net_log);
protected:
DnsProbeJob() { }
DISALLOW_COPY_AND_ASSIGN(DnsProbeJob);
};
} // namespace chrome_browser_net
#endif // CHROME_BROWSER_NET_DNS_PROBE_JOB_H_
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