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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 NET_SPDY_SPDY_CREDENTIAL_STATE_H_
#define NET_SPDY_SPDY_CREDENTIAL_STATE_H_
#pragma once
#include <vector>
#include "net/base/host_port_pair.h"
#include "net/base/net_export.h"
namespace net {
// A class for tracking the credentials associated with a SPDY session.
class NET_EXPORT_PRIVATE SpdyCredentialState {
public:
explicit SpdyCredentialState(size_t num_slots);
~SpdyCredentialState();
// Changes the number of credentials being tracked. If the new size is
// larger, then empty slots will be added to the end. If the new size is
// smaller than the current size, then the extra slots will be truncated
// from the end.
void Resize(size_t size);
// Returns true if there is a credential associated with |origin|.
bool HasCredential(const HostPortPair& origin) const;
// Adds the new credentials. If there is space, then it will add
// in the first available position. Otherwise, an existing credential
// will be evicted. Returns the slot in which this origin was added.
size_t SetHasCredential(const HostPortPair& origin);
// This value is defined as the default initial value in the SPDY spec unless
// otherwise negotiated via SETTINGS.
static const size_t kDefaultNumSlots;
private:
// Returns the index in |slots_| for |origin| or kNoEntry, if no entry
// for |origin| exists.
size_t FindPosition(const HostPortPair& origin) const;
// Sentinel value to be returned by FindPosition when no entry exists.
static const size_t kNoEntry;
// Vector of origins that have credentials.
std::vector<HostPortPair> slots_;
// Index of the last origin added to |slots_|.
size_t last_added_;
};
} // namespace net
#endif // NET_SPDY_SPDY_CREDENTIAL_STATE_H_
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