OLD | NEW |
| (Empty) |
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef NET_DNS_DNS_QUERY_H_ | |
6 #define NET_DNS_DNS_QUERY_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "base/strings/string_piece.h" | |
11 #include "net/base/net_export.h" | |
12 | |
13 namespace net { | |
14 | |
15 class IOBufferWithSize; | |
16 | |
17 // Represents on-the-wire DNS query message as an object. | |
18 // TODO(szym): add support for the OPT pseudo-RR (EDNS0/DNSSEC). | |
19 class NET_EXPORT_PRIVATE DnsQuery { | |
20 public: | |
21 // Constructs a query message from |qname| which *MUST* be in a valid | |
22 // DNS name format, and |qtype|. The qclass is set to IN. | |
23 DnsQuery(uint16 id, const base::StringPiece& qname, uint16 qtype); | |
24 ~DnsQuery(); | |
25 | |
26 // Clones |this| verbatim, with ID field of the header set to |id|. | |
27 DnsQuery* CloneWithNewId(uint16 id) const; | |
28 | |
29 // DnsQuery field accessors. | |
30 uint16 id() const; | |
31 base::StringPiece qname() const; | |
32 uint16 qtype() const; | |
33 | |
34 // Returns the Question section of the query. Used when matching the | |
35 // response. | |
36 base::StringPiece question() const; | |
37 | |
38 // IOBuffer accessor to be used for writing out the query. | |
39 IOBufferWithSize* io_buffer() const { return io_buffer_.get(); } | |
40 | |
41 void set_flags(uint16 flags); | |
42 | |
43 private: | |
44 DnsQuery(const DnsQuery& orig, uint16 id); | |
45 | |
46 // Size of the DNS name (*NOT* hostname) we are trying to resolve; used | |
47 // to calculate offsets. | |
48 size_t qname_size_; | |
49 | |
50 // Contains query bytes to be consumed by higher level Write() call. | |
51 scoped_refptr<IOBufferWithSize> io_buffer_; | |
52 | |
53 DISALLOW_COPY_AND_ASSIGN(DnsQuery); | |
54 }; | |
55 | |
56 } // namespace net | |
57 | |
58 #endif // NET_DNS_DNS_QUERY_H_ | |
OLD | NEW |