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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "net/dns/dns_query.h" | 5 #include "net/dns/dns_query.h" |
6 | 6 |
7 #include <limits> | 7 #include <limits> |
8 | 8 |
9 #include "base/sys_byteorder.h" | 9 #include "base/sys_byteorder.h" |
10 #include "net/base/big_endian.h" | 10 #include "net/base/big_endian.h" |
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21 DnsQuery::DnsQuery(uint16 id, const base::StringPiece& qname, uint16 qtype) | 21 DnsQuery::DnsQuery(uint16 id, const base::StringPiece& qname, uint16 qtype) |
22 : qname_size_(qname.size()) { | 22 : qname_size_(qname.size()) { |
23 DCHECK(!DNSDomainToString(qname).empty()); | 23 DCHECK(!DNSDomainToString(qname).empty()); |
24 // QNAME + QTYPE + QCLASS | 24 // QNAME + QTYPE + QCLASS |
25 size_t question_size = qname_size_ + sizeof(uint16) + sizeof(uint16); | 25 size_t question_size = qname_size_ + sizeof(uint16) + sizeof(uint16); |
26 io_buffer_ = new IOBufferWithSize(sizeof(dns_protocol::Header) + | 26 io_buffer_ = new IOBufferWithSize(sizeof(dns_protocol::Header) + |
27 question_size); | 27 question_size); |
28 dns_protocol::Header* header = | 28 dns_protocol::Header* header = |
29 reinterpret_cast<dns_protocol::Header*>(io_buffer_->data()); | 29 reinterpret_cast<dns_protocol::Header*>(io_buffer_->data()); |
30 memset(header, 0, sizeof(dns_protocol::Header)); | 30 memset(header, 0, sizeof(dns_protocol::Header)); |
31 header->id = htons(id); | 31 header->id = base::HostToNet16(id); |
32 header->flags = htons(dns_protocol::kFlagRD); | 32 header->flags = base::HostToNet16(dns_protocol::kFlagRD); |
33 header->qdcount = htons(1); | 33 header->qdcount = base::HostToNet16(1); |
34 | 34 |
35 // Write question section after the header. | 35 // Write question section after the header. |
36 BigEndianWriter writer(reinterpret_cast<char*>(header + 1), question_size); | 36 BigEndianWriter writer(reinterpret_cast<char*>(header + 1), question_size); |
37 writer.WriteBytes(qname.data(), qname.size()); | 37 writer.WriteBytes(qname.data(), qname.size()); |
38 writer.WriteU16(qtype); | 38 writer.WriteU16(qtype); |
39 writer.WriteU16(dns_protocol::kClassIN); | 39 writer.WriteU16(dns_protocol::kClassIN); |
40 } | 40 } |
41 | 41 |
42 DnsQuery::~DnsQuery() { | 42 DnsQuery::~DnsQuery() { |
43 } | 43 } |
44 | 44 |
45 DnsQuery* DnsQuery::CloneWithNewId(uint16 id) const { | 45 DnsQuery* DnsQuery::CloneWithNewId(uint16 id) const { |
46 return new DnsQuery(*this, id); | 46 return new DnsQuery(*this, id); |
47 } | 47 } |
48 | 48 |
49 uint16 DnsQuery::id() const { | 49 uint16 DnsQuery::id() const { |
50 const dns_protocol::Header* header = | 50 const dns_protocol::Header* header = |
51 reinterpret_cast<const dns_protocol::Header*>(io_buffer_->data()); | 51 reinterpret_cast<const dns_protocol::Header*>(io_buffer_->data()); |
52 return ntohs(header->id); | 52 return base::NetToHost16(header->id); |
53 } | 53 } |
54 | 54 |
55 base::StringPiece DnsQuery::qname() const { | 55 base::StringPiece DnsQuery::qname() const { |
56 return base::StringPiece(io_buffer_->data() + sizeof(dns_protocol::Header), | 56 return base::StringPiece(io_buffer_->data() + sizeof(dns_protocol::Header), |
57 qname_size_); | 57 qname_size_); |
58 } | 58 } |
59 | 59 |
60 uint16 DnsQuery::qtype() const { | 60 uint16 DnsQuery::qtype() const { |
61 uint16 type; | 61 uint16 type; |
62 ReadBigEndian<uint16>(io_buffer_->data() + | 62 ReadBigEndian<uint16>(io_buffer_->data() + |
63 sizeof(dns_protocol::Header) + | 63 sizeof(dns_protocol::Header) + |
64 qname_size_, &type); | 64 qname_size_, &type); |
65 return type; | 65 return type; |
66 } | 66 } |
67 | 67 |
68 base::StringPiece DnsQuery::question() const { | 68 base::StringPiece DnsQuery::question() const { |
69 return base::StringPiece(io_buffer_->data() + sizeof(dns_protocol::Header), | 69 return base::StringPiece(io_buffer_->data() + sizeof(dns_protocol::Header), |
70 qname_size_ + sizeof(uint16) + sizeof(uint16)); | 70 qname_size_ + sizeof(uint16) + sizeof(uint16)); |
71 } | 71 } |
72 | 72 |
73 DnsQuery::DnsQuery(const DnsQuery& orig, uint16 id) { | 73 DnsQuery::DnsQuery(const DnsQuery& orig, uint16 id) { |
74 qname_size_ = orig.qname_size_; | 74 qname_size_ = orig.qname_size_; |
75 io_buffer_ = new IOBufferWithSize(orig.io_buffer()->size()); | 75 io_buffer_ = new IOBufferWithSize(orig.io_buffer()->size()); |
76 memcpy(io_buffer_.get()->data(), orig.io_buffer()->data(), | 76 memcpy(io_buffer_.get()->data(), orig.io_buffer()->data(), |
77 io_buffer_.get()->size()); | 77 io_buffer_.get()->size()); |
78 dns_protocol::Header* header = | 78 dns_protocol::Header* header = |
79 reinterpret_cast<dns_protocol::Header*>(io_buffer_->data()); | 79 reinterpret_cast<dns_protocol::Header*>(io_buffer_->data()); |
80 header->id = htons(id); | 80 header->id = base::HostToNet16(id); |
81 } | 81 } |
82 | 82 |
83 } // namespace net | 83 } // namespace net |
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