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// Copyright (c) 2011 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_BASE_DNS_RESPONSE_H_
#define NET_BASE_DNS_RESPONSE_H_
#pragma once
#include "net/base/dns_query.h"
namespace net{
// Represents on-the-wire DNS response as an object; allows extracting
// records.
class DnsResponse {
public:
// Constructs an object with an IOBuffer large enough to read
// one byte more than largest possible response, to detect malformed
// responses; |query| is a pointer to the DnsQuery for which |this|
// is supposed to be a response.
explicit DnsResponse(DnsQuery* query);
~DnsResponse();
// Internal buffer accessor into which actual bytes of response will be
// read.
IOBufferWithSize* io_buffer() { return io_buffer_.get(); }
// Parses response of size nbytes and puts address into |ip_addresses|,
// returns net_error code in case of failure.
int Parse(int nbytes, std::vector<IPAddressNumber>* ip_addresses);
private:
// The matching query; |this| is the response for |query_|. We do not
// own it, lifetime of |this| should be within the limits of lifetime of
// |query_|.
const DnsQuery* const query_;
// Buffer into which response bytes are read.
scoped_refptr<IOBufferWithSize> io_buffer_;
DISALLOW_COPY_AND_ASSIGN(DnsResponse);
};
} // namespace net
#endif // NET_BASE_DNS_RESPONSE_H_
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