DnsClient refactoring + features (timeout, suffix search, server rotation).

net/dns/dns_query.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_query.h"
 
 #include <limits>
 
 #include "base/sys_byteorder.h"
 #include "net/base/big_endian.h"
 #include "net/base/dns_util.h"
@@ skipping 10 matching lines @@
     : qname_size_(qname.size()) {
   DCHECK(!DNSDomainToString(qname).empty());
   // QNAME + QTYPE + QCLASS
   size_t question_size = qname_size_ + sizeof(uint16) + sizeof(uint16);
   io_buffer_ = new IOBufferWithSize(sizeof(dns_protocol::Header) +
                                     question_size);
   dns_protocol::Header* header =
       reinterpret_cast<dns_protocol::Header*>(io_buffer_->data());
   memset(header, 0, sizeof(dns_protocol::Header));
   header->id = htons(id);
-  header->flags[0] = 0x1;  // RD bit
+  header->flags = htons(dns_protocol::kFlagRD);
   header->qdcount = htons(1);
 
   // Write question section after the header.
   BigEndianWriter writer(reinterpret_cast<char*>(header + 1), question_size);
   writer.WriteBytes(qname.data(), qname.size());
   writer.WriteU16(qtype);
   writer.WriteU16(dns_protocol::kClassIN);
 }
 
 DnsQuery::~DnsQuery() {
@@ skipping 31 matching lines @@
   qname_size_ = orig.qname_size_;
   io_buffer_ = new IOBufferWithSize(orig.io_buffer()->size());
   memcpy(io_buffer_.get()->data(), orig.io_buffer()->data(),
          io_buffer_.get()->size());
   dns_protocol::Header* header =
       reinterpret_cast<dns_protocol::Header*>(io_buffer_->data());
   header->id = htons(id);
 }
 
 }  // namespace net