net: move kRcodeMask into dns_response.cc

net/dns/dns_response.cc

 // 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.
 
 #include "net/dns/dns_response.h"
 
 #include <limits>
 
 #include "base/big_endian.h"
 #include "base/strings/string_util.h"
 #include "base/sys_byteorder.h"
 #include "net/base/address_list.h"
 #include "net/base/io_buffer.h"
 #include "net/base/ip_address.h"
 #include "net/base/net_errors.h"
 #include "net/dns/dns_protocol.h"
 #include "net/dns/dns_query.h"
 #include "net/dns/dns_util.h"
 
 namespace net {
 
+namespace {
+
+const uint8_t kRcodeMask = 0xf;
+
+}  // namespace
+
 DnsResourceRecord::DnsResourceRecord() {
 }
 
 DnsResourceRecord::~DnsResourceRecord() {
 }
 
 DnsRecordParser::DnsRecordParser() : packet_(NULL), length_(0), cur_(0) {
 }
 
 DnsRecordParser::DnsRecordParser(const void* packet,
@@ skipping 182 matching lines @@
 
   return true;
 }
 
 bool DnsResponse::IsValid() const {
   return parser_.IsValid();
 }
 
 uint16_t DnsResponse::flags() const {
   DCHECK(parser_.IsValid());
-  return base::NetToHost16(header()->flags) & ~(dns_protocol::kRcodeMask);
+  return base::NetToHost16(header()->flags) & ~(kRcodeMask);
 }
 
 uint8_t DnsResponse::rcode() const {
   DCHECK(parser_.IsValid());
-  return base::NetToHost16(header()->flags) & dns_protocol::kRcodeMask;
+  return base::NetToHost16(header()->flags) & kRcodeMask;
 }
 
 unsigned DnsResponse::answer_count() const {
   DCHECK(parser_.IsValid());
   return base::NetToHost16(header()->ancount);
 }
 
 unsigned DnsResponse::additional_answer_count() const {
   DCHECK(parser_.IsValid());
   return base::NetToHost16(header()->arcount);
@@ skipping 94 matching lines @@
 
   // getcanonname in eglibc returns the first owner name of an A or AAAA RR.
   // If the response passed all the checks so far, then |expected_name| is it.
   *addr_list = AddressList::CreateFromIPAddressList(ip_addresses,
                                                     expected_name);
   *ttl = base::TimeDelta::FromSeconds(ttl_sec);
   return DNS_PARSE_OK;
 }
 
 }  // namespace net