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Unified Diff: net/dns/dns_session.h

Issue 992733002: Remove //net (except for Android test stuff) and sdch (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 9 months ago
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Index: net/dns/dns_session.h
diff --git a/net/dns/dns_session.h b/net/dns/dns_session.h
deleted file mode 100644
index e878a57572ce7aa695627e02453a4ddcae3e2471..0000000000000000000000000000000000000000
--- a/net/dns/dns_session.h
+++ /dev/null
@@ -1,147 +0,0 @@
-// 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 NET_DNS_DNS_SESSION_H_
-#define NET_DNS_DNS_SESSION_H_
-
-#include <vector>
-
-#include "base/lazy_instance.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "base/metrics/bucket_ranges.h"
-#include "base/time/time.h"
-#include "net/base/net_export.h"
-#include "net/base/rand_callback.h"
-#include "net/dns/dns_config_service.h"
-#include "net/dns/dns_socket_pool.h"
-
-namespace base {
-class BucketRanges;
-class SampleVector;
-}
-
-namespace net {
-
-class ClientSocketFactory;
-class DatagramClientSocket;
-class NetLog;
-class StreamSocket;
-
-// Session parameters and state shared between DNS transactions.
-// Ref-counted so that DnsClient::Request can keep working in absence of
-// DnsClient. A DnsSession must be recreated when DnsConfig changes.
-class NET_EXPORT_PRIVATE DnsSession
- : NON_EXPORTED_BASE(public base::RefCounted<DnsSession>) {
- public:
- typedef base::Callback<int()> RandCallback;
-
- class NET_EXPORT_PRIVATE SocketLease {
- public:
- SocketLease(scoped_refptr<DnsSession> session,
- unsigned server_index,
- scoped_ptr<DatagramClientSocket> socket);
- ~SocketLease();
-
- unsigned server_index() const { return server_index_; }
-
- DatagramClientSocket* socket() { return socket_.get(); }
-
- private:
- scoped_refptr<DnsSession> session_;
- unsigned server_index_;
- scoped_ptr<DatagramClientSocket> socket_;
-
- DISALLOW_COPY_AND_ASSIGN(SocketLease);
- };
-
- DnsSession(const DnsConfig& config,
- scoped_ptr<DnsSocketPool> socket_pool,
- const RandIntCallback& rand_int_callback,
- NetLog* net_log);
-
- const DnsConfig& config() const { return config_; }
- NetLog* net_log() const { return net_log_; }
-
- // Return the next random query ID.
- uint16 NextQueryId() const;
-
- // Return the index of the first configured server to use on first attempt.
- unsigned NextFirstServerIndex();
-
- // Start with |server_index| and find the index of the next known good server
- // to use on this attempt. Returns |server_index| if this server has no
- // recorded failures, or if there are no other servers that have not failed
- // or have failed longer time ago.
- unsigned NextGoodServerIndex(unsigned server_index);
-
- // Record that server failed to respond (due to SRV_FAIL or timeout).
- void RecordServerFailure(unsigned server_index);
-
- // Record that server responded successfully.
- void RecordServerSuccess(unsigned server_index);
-
- // Record how long it took to receive a response from the server.
- void RecordRTT(unsigned server_index, base::TimeDelta rtt);
-
- // Record suspected loss of a packet for a specific server.
- void RecordLostPacket(unsigned server_index, int attempt);
-
- // Record server stats before it is destroyed.
- void RecordServerStats();
-
- // Return the timeout for the next query. |attempt| counts from 0 and is used
- // for exponential backoff.
- base::TimeDelta NextTimeout(unsigned server_index, int attempt);
-
- // Allocate a socket, already connected to the server address.
- // When the SocketLease is destroyed, the socket will be freed.
- scoped_ptr<SocketLease> AllocateSocket(unsigned server_index,
- const NetLog::Source& source);
-
- // Creates a StreamSocket from the factory for a transaction over TCP. These
- // sockets are not pooled.
- scoped_ptr<StreamSocket> CreateTCPSocket(unsigned server_index,
- const NetLog::Source& source);
-
- private:
- friend class base::RefCounted<DnsSession>;
- ~DnsSession();
-
- // Release a socket.
- void FreeSocket(unsigned server_index,
- scoped_ptr<DatagramClientSocket> socket);
-
- // Return the timeout using the TCP timeout method.
- base::TimeDelta NextTimeoutFromJacobson(unsigned server_index, int attempt);
-
- // Compute the timeout using the histogram method.
- base::TimeDelta NextTimeoutFromHistogram(unsigned server_index, int attempt);
-
- const DnsConfig config_;
- scoped_ptr<DnsSocketPool> socket_pool_;
- RandCallback rand_callback_;
- NetLog* net_log_;
-
- // Current index into |config_.nameservers| to begin resolution with.
- int server_index_;
-
- struct ServerStats;
-
- // Track runtime statistics of each DNS server.
- ScopedVector<ServerStats> server_stats_;
-
- // Buckets shared for all |ServerStats::rtt_histogram|.
- struct RttBuckets : public base::BucketRanges {
- RttBuckets();
- };
- static base::LazyInstance<RttBuckets>::Leaky rtt_buckets_;
-
- DISALLOW_COPY_AND_ASSIGN(DnsSession);
-};
-
-} // namespace net
-
-#endif // NET_DNS_DNS_SESSION_H_
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