Revert 87809 - Added DnsQuery class

net/base/dns_query.cc

Index: net/base/dns_query.cc
===================================================================
--- net/base/dns_query.cc	(revision 87811)
+++ net/base/dns_query.cc	(working copy)
@@ -1,108 +0,0 @@
-// 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.
-
-#include "net/base/dns_query.h"
-
-#include <string>
-
-#include "base/rand_util.h"
-#include "net/base/address_family.h"
-#include "net/base/dns_util.h"
-
-namespace net {
-
-namespace {
-
-void PackUint16BE(char buf[2], uint16 v) {
-  buf[0] = v >> 8;
-  buf[1] = v & 0xff;
-}
-
-uint16 QTypeFromAddressFamily(AddressFamily address_family) {
-  switch (address_family) {
-    case ADDRESS_FAMILY_IPV4:
-      return kDNS_A;
-    case ADDRESS_FAMILY_IPV6:
-      return kDNS_AAAA;
-    default:
-      NOTREACHED() << "Bad address family";
-      return kDNS_A;
-  }
-}
-
-}  // namespace
-
-// DNS query consists of a 12-byte header followed by a question section.
-// For details, see RFC 1035 section 4.1.1.  This header template sets RD
-// bit, which directs the name server to pursue query recursively, and sets
-// the QDCOUNT to 1, meaning the question section has a single entry.  The
-// first two bytes of the header form a 16-bit random query ID to be copied
-// in the corresponding reply by the name server -- randomized during
-// DnsQuery construction.
-static const char kHeader[] = {0x00, 0x00, 0x01, 0x00, 0x00, 0x01,
-                               0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-static const size_t kHeaderLen = arraysize(kHeader);
-
-DnsQuery::DnsQuery(const std::string& hostname,
-                   AddressFamily address_family,
-                   int port)
-    : port_(port),
-      id_(0),
-      qtype_(QTypeFromAddressFamily(address_family)),
-      hostname_(hostname) {
-  std::string qname;
-  if (!net::DNSDomainFromDot(hostname, &qname))
-    return;
-
-  size_t query_size = kHeaderLen + qname.size() +
-    sizeof(qtype_) + sizeof(kClassIN);
-
-  io_buffer_ = new IOBufferWithSize(query_size);
-
-  int byte_offset = 0;
-  char* buffer_head = io_buffer_->data();
-  memcpy(&buffer_head[byte_offset], kHeader, kHeaderLen);
-  byte_offset += kHeaderLen;
-  memcpy(&buffer_head[byte_offset], &qname[0], qname.size());
-  byte_offset += qname.size();
-  PackUint16BE(&buffer_head[byte_offset], qtype_);
-  byte_offset += sizeof(qtype_);
-  PackUint16BE(&buffer_head[byte_offset], kClassIN);
-
-  // Randomize ID, first two bytes.
-  id_ = base::RandUint64() & 0xffff;
-  PackUint16BE(&buffer_head[0], id_);
-}
-
-int DnsQuery::port() const {
-  DCHECK(IsValid());
-  return port_;
-}
-
-uint16 DnsQuery::id() const {
-  DCHECK(IsValid());
-  return id_;
-}
-
-uint16 DnsQuery::qtype() const {
-  DCHECK(IsValid());
-  return qtype_;
-}
-
-AddressFamily DnsQuery::address_family() const {
-  DCHECK(IsValid());
-  return address_family_;
-}
-
-const std::string& DnsQuery::hostname() const {
-  DCHECK(IsValid());
-  return hostname_;
-}
-
-IOBufferWithSize* DnsQuery::io_buffer() const {
-  DCHECK(IsValid());
-  return io_buffer_.get();
-}
-
-}  // namespace net