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
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
// Copyright (C) 2011, 2015 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 <dns/name.h>
#include <dns/messagerenderer.h>
#include <dns/rdata.h>
#include <dns/rdataclass.h>
#include <dns/rdata/generic/detail/char_string.h>
#include <exceptions/exceptions.h>
#include <string>
#include <boost/lexical_cast.hpp>
using namespace std;
using boost::lexical_cast;
using namespace isc::util;
using namespace isc::dns;
// BEGIN_ISC_NAMESPACE
// BEGIN_RDATA_NAMESPACE
class NAPTRImpl {
public:
NAPTRImpl() : order(0), preference(0), replacement(".") {}
NAPTRImpl(InputBuffer& buffer, size_t rdata_len) : replacement(".") {
if (rdata_len < 4 || buffer.getLength() - buffer.getPosition() < 4) {
isc_throw(isc::dns::DNSMessageFORMERR, "Error in parsing "
"NAPTR RDATA wire format: insufficient length ");
}
order = buffer.readUint16();
preference = buffer.readUint16();
rdata_len -= 4;
rdata_len -= detail::bufferToCharString(buffer, rdata_len, flags);
rdata_len -= detail::bufferToCharString(buffer, rdata_len, services);
rdata_len -= detail::bufferToCharString(buffer, rdata_len, regexp);
replacement = Name(buffer);
if (rdata_len < 1) {
isc_throw(isc::dns::DNSMessageFORMERR, "Error in parsing "
"NAPTR RDATA wire format: missing replacement name");
}
rdata_len -= replacement.getLength();
if (rdata_len != 0) {
isc_throw(isc::dns::DNSMessageFORMERR, "Error in parsing " <<
"NAPTR RDATA: bytes left at end: " <<
static_cast<int>(rdata_len));
}
}
NAPTRImpl(const std::string& naptr_str) : replacement(".") {
std::istringstream ss(naptr_str);
MasterLexer lexer;
lexer.pushSource(ss);
try {
parseNAPTRData(lexer);
// Should be at end of data now
if (lexer.getNextToken(MasterToken::QSTRING, true).getType() !=
MasterToken::END_OF_FILE) {
isc_throw(InvalidRdataText,
"Invalid NAPTR text format: too many fields.");
}
} catch (const MasterLexer::LexerError& ex) {
isc_throw(InvalidRdataText, "Failed to construct NAPTR RDATA from "
<< naptr_str << "': " << ex.what());
}
}
NAPTRImpl(MasterLexer& lexer) : replacement(".")
{
parseNAPTRData(lexer);
}
private:
void
parseNAPTRData(MasterLexer& lexer) {
MasterToken token = lexer.getNextToken(MasterToken::NUMBER);
if (token.getNumber() > 65535) {
isc_throw(InvalidRdataText,
"Invalid NAPTR text format: order out of range: "
<< token.getNumber());
}
order = token.getNumber();
token = lexer.getNextToken(MasterToken::NUMBER);
if (token.getNumber() > 65535) {
isc_throw(InvalidRdataText,
"Invalid NAPTR text format: preference out of range: "
<< token.getNumber());
}
preference = token.getNumber();
token = lexer.getNextToken(MasterToken::QSTRING);
stringToCharString(token.getStringRegion(), flags);
token = lexer.getNextToken(MasterToken::QSTRING);
stringToCharString(token.getStringRegion(), services);
token = lexer.getNextToken(MasterToken::QSTRING);
stringToCharString(token.getStringRegion(), regexp);
token = lexer.getNextToken(MasterToken::STRING);
replacement = Name(token.getString());
}
public:
uint16_t order;
uint16_t preference;
detail::CharString flags;
detail::CharString services;
detail::CharString regexp;
Name replacement;
};
NAPTR::NAPTR(InputBuffer& buffer, size_t rdata_len) :
impl_(new NAPTRImpl(buffer, rdata_len))
{}
NAPTR::NAPTR(const std::string& naptr_str) : impl_(new NAPTRImpl(naptr_str))
{}
NAPTR::NAPTR(MasterLexer& lexer, const Name*,
MasterLoader::Options, MasterLoaderCallbacks&) :
impl_(new NAPTRImpl(lexer))
{}
NAPTR::NAPTR(const NAPTR& naptr) : Rdata(),
impl_(new NAPTRImpl(*naptr.impl_))
{}
NAPTR&
NAPTR::operator=(const NAPTR& source)
{
impl_.reset(new NAPTRImpl(*source.impl_));
return (*this);
}
NAPTR::~NAPTR() {
}
void
NAPTR::toWire(OutputBuffer& buffer) const {
toWireHelper(buffer);
impl_->replacement.toWire(buffer);
}
void
NAPTR::toWire(AbstractMessageRenderer& renderer) const {
toWireHelper(renderer);
// Type NAPTR is not "well-known", and name compression must be disabled
// per RFC3597.
renderer.writeName(impl_->replacement, false);
}
string
NAPTR::toText() const {
string result;
result += lexical_cast<string>(impl_->order);
result += " ";
result += lexical_cast<string>(impl_->preference);
result += " \"";
result += detail::charStringToString(impl_->flags);
result += "\" \"";
result += detail::charStringToString(impl_->services);
result += "\" \"";
result += detail::charStringToString(impl_->regexp);
result += "\" ";
result += impl_->replacement.toText();
return (result);
}
int
NAPTR::compare(const Rdata& other) const {
const NAPTR other_naptr = dynamic_cast<const NAPTR&>(other);
if (impl_->order < other_naptr.impl_->order) {
return (-1);
} else if (impl_->order > other_naptr.impl_->order) {
return (1);
}
if (impl_->preference < other_naptr.impl_->preference) {
return (-1);
} else if (impl_->preference > other_naptr.impl_->preference) {
return (1);
}
const int fcmp = detail::compareCharStrings(impl_->flags,
other_naptr.impl_->flags);
if (fcmp != 0) {
return (fcmp);
}
const int scmp = detail::compareCharStrings(impl_->services,
other_naptr.impl_->services);
if (scmp != 0) {
return (scmp);
}
const int rcmp = detail::compareCharStrings(impl_->regexp,
other_naptr.impl_->regexp);
if (rcmp != 0) {
return (rcmp);
}
return (compareNames(impl_->replacement, other_naptr.impl_->replacement));
}
uint16_t
NAPTR::getOrder() const {
return (impl_->order);
}
uint16_t
NAPTR::getPreference() const {
return (impl_->preference);
}
const std::string
NAPTR::getFlags() const {
return (detail::charStringToString(impl_->flags));
}
const std::string
NAPTR::getServices() const {
return (detail::charStringToString(impl_->services));
}
const std::string
NAPTR::getRegexp() const {
return (detail::charStringToString(impl_->regexp));
}
const Name&
NAPTR::getReplacement() const {
return (impl_->replacement);
}
template <typename T>
void
NAPTR::toWireHelper(T& outputer) const {
outputer.writeUint16(impl_->order);
outputer.writeUint16(impl_->preference);
outputer.writeData(&impl_->flags[0], impl_->flags.size());
outputer.writeData(&impl_->services[0], impl_->services.size());
outputer.writeData(&impl_->regexp[0], impl_->regexp.size());
}
// END_RDATA_NAMESPACE
// END_ISC_NAMESPACE
|
