Added DnsQuery class

net/base/dns_util.h

 // 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_UTIL_H_
 #define NET_BASE_DNS_UTIL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 13 matching lines @@
 // DNSDomainToString coverts a domain in DNS format to a dotted string.
 NET_TEST std::string DNSDomainToString(const std::string& domain);
 
 // Returns true iff the given character is in the set of valid DNS label
 // characters as given in RFC 3490, 4.1, 3(a)
 NET_TEST bool IsSTD3ASCIIValidCharacter(char c);
 
 // Returns the hostname by trimming the ending dot, if one exists.
 NET_API std::string TrimEndingDot(const std::string& host);
 
+// DNS class types.
+static const uint16 kClassIN = 1;
+
 // DNS resource record types. See
 // http://www.iana.org/assignments/dns-parameters
 // WARNING: if you're adding any new values here you may need to add them to
 // dnsrr_resolver.cc:DnsRRIsParsedByWindows.
-
+static const uint16 kDNS_A = 1;
 static const uint16 kDNS_CNAME = 5;
 static const uint16 kDNS_TXT = 16;
+static const uint16 kDNS_AAAA = 28;
 static const uint16 kDNS_CERT = 37;
 static const uint16 kDNS_DS = 43;
 static const uint16 kDNS_RRSIG = 46;
 static const uint16 kDNS_DNSKEY = 48;
 static const uint16 kDNS_ANY = 0xff;
 static const uint16 kDNS_CAA = 13172;  // temporary, not IANA
 static const uint16 kDNS_TESTING = 0xfffe;  // in private use area.
 
 // http://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml
 static const uint8 kDNSSEC_RSA_SHA1 = 5;
@@ skipping 31 matching lines @@
   unsigned len_;
   const unsigned packet_len_;
 
   DISALLOW_COPY_AND_ASSIGN(DnsResponseBuffer);
 };
 
 
 }  // namespace net
 
 #endif  // NET_BASE_DNS_UTIL_H_