Finished DNS-SD server. Finished Privet-specified DNS-SD server.

cloud_print/gcp20/prototype/dns_packet_parser.cc

Index: cloud_print/gcp20/prototype/dns_packet_parser.cc
diff --git a/cloud_print/gcp20/prototype/dns_packet_parser.cc b/cloud_print/gcp20/prototype/dns_packet_parser.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f85ffc72f8b5487f79661d0c031ec75e7e881281
--- /dev/null
+++ b/cloud_print/gcp20/prototype/dns_packet_parser.cc
@@ -0,0 +1,38 @@
+// Copyright 2013 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 "cloud_print/gcp20/prototype/dns_packet_parser.h"
+
+#include "net/base/big_endian.h"
+
+DnsPacketParser::DnsPacketParser(const char* packet, size_t length)
+    : packet_(packet),
+      length_(length),
+      record_parser_(packet, length, sizeof(header_)) {
+  net::BigEndianReader reader(packet, length);
+  is_header_read_ = reader.ReadU16(&header_.id) &&
+                    reader.ReadU16(&header_.flags) &&
+                    reader.ReadU16(&header_.qdcount) &&
+                    reader.ReadU16(&header_.ancount) &&
+                    reader.ReadU16(&header_.nscount) &&
+                    reader.ReadU16(&header_.arcount);
+}
+
+bool DnsPacketParser::ReadRecord(DnsQueryRecord* out) {
+  DCHECK(packet_);
+  DnsQueryRecord result;
+  size_t consumed = ReadName(&result.qname);
+  if (!consumed)
+    return false;
+  net::BigEndianReader reader(packet_ + GetOffset() + consumed,
+                              length_ - (GetOffset() + consumed));
+  if (reader.ReadU16(&result.qtype) && reader.ReadU16(&result.qclass) &&
+    record_parser_.SkipQuestion()) {  // instead of |cur_ = reader.ptr();|
+      *out = result;
+      return true;
+  }
+
+  return false;
+}
+