1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
// Copyright (C) 2010-2016 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <util/buffer.h>
#include <dns/messagerenderer.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <boost/foreach.hpp>
#include <string>
#include <string.h>
using namespace std;
using namespace isc::util;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
/// \brief Constructor.
OPT::PseudoRR::PseudoRR(uint16_t code,
boost::shared_ptr<std::vector<uint8_t> >& data) :
code_(code),
data_(data)
{
}
uint16_t
OPT::PseudoRR::getCode() const {
return (code_);
}
const uint8_t*
OPT::PseudoRR::getData() const {
return (&(*data_)[0]);
}
uint16_t
OPT::PseudoRR::getLength() const {
return (data_->size());
}
struct OPTImpl {
OPTImpl() :
rdlength_(0)
{}
uint16_t rdlength_;
std::vector<OPT::PseudoRR> pseudo_rrs_;
};
/// \brief Default constructor.
OPT::OPT() :
impl_(new OPTImpl)
{
}
/// \brief Constructor from string.
///
/// This constructor cannot be used, and always throws an exception.
///
/// \throw InvalidRdataText OPT RR cannot be constructed from text.
OPT::OPT(const std::string&) :
impl_(NULL)
{
isc_throw(InvalidRdataText, "OPT RR cannot be constructed from text");
}
/// \brief Constructor with a context of MasterLexer.
///
/// This constructor cannot be used, and always throws an exception.
///
/// \throw InvalidRdataText OPT RR cannot be constructed from text.
OPT::OPT(MasterLexer&, const Name*,
MasterLoader::Options, MasterLoaderCallbacks&) :
impl_(NULL)
{
isc_throw(InvalidRdataText, "OPT RR cannot be constructed from text");
}
OPT::OPT(InputBuffer& buffer, size_t rdata_len) :
impl_(NULL)
{
std::unique_ptr<OPTImpl> impl_ptr(new OPTImpl);
while (true) {
if (rdata_len == 0) {
break;
}
if (rdata_len < 4) {
isc_throw(InvalidRdataLength,
"Pseudo OPT RR record too short: "
<< rdata_len << " bytes");
}
const uint16_t option_code = buffer.readUint16();
const uint16_t option_length = buffer.readUint16();
rdata_len -= 4;
if (static_cast<uint16_t>(impl_ptr->rdlength_ + option_length) <
impl_ptr->rdlength_)
{
isc_throw(InvalidRdataText,
"Option length " << option_length
<< " would overflow OPT RR RDLEN (currently "
<< impl_ptr->rdlength_ << ").");
}
if (rdata_len < option_length) {
isc_throw(InvalidRdataLength, "Corrupt pseudo OPT RR record");
}
boost::shared_ptr<std::vector<uint8_t> >
option_data(new std::vector<uint8_t>(option_length));
buffer.readData(&(*option_data)[0], option_length);
impl_ptr->pseudo_rrs_.push_back(PseudoRR(option_code, option_data));
impl_ptr->rdlength_ += option_length;
rdata_len -= option_length;
}
impl_ = impl_ptr.release();
}
OPT::OPT(const OPT& other) :
Rdata(), impl_(new OPTImpl(*other.impl_))
{
}
OPT&
OPT::operator=(const OPT& source) {
if (this == &source) {
return (*this);
}
OPTImpl* newimpl = new OPTImpl(*source.impl_);
delete impl_;
impl_ = newimpl;
return (*this);
}
OPT::~OPT() {
delete impl_;
}
std::string
OPT::toText() const {
isc_throw(isc::InvalidOperation,
"OPT RRs do not have a presentation format");
}
void
OPT::toWire(OutputBuffer& buffer) const {
BOOST_FOREACH(const PseudoRR& pseudo_rr, impl_->pseudo_rrs_) {
buffer.writeUint16(pseudo_rr.getCode());
const uint16_t length = pseudo_rr.getLength();
buffer.writeUint16(length);
if (length > 0) {
buffer.writeData(pseudo_rr.getData(), length);
}
}
}
void
OPT::toWire(AbstractMessageRenderer& renderer) const {
BOOST_FOREACH(const PseudoRR& pseudo_rr, impl_->pseudo_rrs_) {
renderer.writeUint16(pseudo_rr.getCode());
const uint16_t length = pseudo_rr.getLength();
renderer.writeUint16(length);
if (length > 0) {
renderer.writeData(pseudo_rr.getData(), length);
}
}
}
int
OPT::compare(const Rdata&) const {
isc_throw(isc::InvalidOperation,
"It is meaningless to compare a set of OPT pseudo RRs; "
"they have unspecified order");
return (0);
}
void
OPT::appendPseudoRR(uint16_t code, const uint8_t* data, uint16_t length) {
// See if it overflows 16-bit length field. We only worry about the
// pseudo-RR length here, not the whole message length (which should
// be checked and enforced elsewhere).
if (static_cast<uint16_t>(impl_->rdlength_ + length) <
impl_->rdlength_)
{
isc_throw(isc::InvalidParameter,
"Option length " << length
<< " would overflow OPT RR RDLEN (currently "
<< impl_->rdlength_ << ").");
}
boost::shared_ptr<std::vector<uint8_t> >
option_data(new std::vector<uint8_t>(length));
if (length != 0) {
std::memcpy(&(*option_data)[0], data, length);
}
impl_->pseudo_rrs_.push_back(PseudoRR(code, option_data));
impl_->rdlength_ += length;
}
const std::vector<OPT::PseudoRR>&
OPT::getPseudoRRs() const {
return (impl_->pseudo_rrs_);
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
|
