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
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
|
/*
* Copyright (C) 2005-2010 Martin Willi
* Copyright (C) 2010 revosec AG
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stddef.h>
#include "cp_payload.h"
#include <encoding/payloads/encodings.h>
#include <utils/linked_list.h>
ENUM(config_type_names, CFG_REQUEST, CFG_ACK,
"CFG_REQUEST",
"CFG_REPLY",
"CFG_SET",
"CFG_ACK",
);
typedef struct private_cp_payload_t private_cp_payload_t;
/**
* Private data of an cp_payload_t object.
*/
struct private_cp_payload_t {
/**
* Public cp_payload_t interface.
*/
cp_payload_t public;
/**
* Next payload type.
*/
u_int8_t next_payload;
/**
* Critical flag.
*/
bool critical;
/**
* Reserved bits
*/
bool reserved_bit[7];
/**
* Reserved bytes
*/
u_int8_t reserved_byte[3];
/**
* Length of this payload.
*/
u_int16_t payload_length;
/**
* Identifier field, IKEv1 only
*/
u_int16_t identifier;
/**
* List of attributes, as configuration_attribute_t
*/
linked_list_t *attributes;
/**
* Config Type.
*/
u_int8_t cfg_type;
/**
* CONFIGURATION or CONFIGURATION_V1
*/
payload_type_t type;
};
/**
* Encoding rules to for an IKEv2 configuration payload
*/
static encoding_rule_t encodings_v2[] = {
/* 1 Byte next payload type, stored in the field next_payload */
{ U_INT_8, offsetof(private_cp_payload_t, next_payload) },
/* the critical bit */
{ FLAG, offsetof(private_cp_payload_t, critical) },
/* 7 Bit reserved bits */
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[0]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[1]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[2]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[3]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[4]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[5]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[6]) },
/* Length of the whole CP payload*/
{ PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
{ U_INT_8, offsetof(private_cp_payload_t, cfg_type) },
/* 3 reserved bytes */
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[0])},
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[1])},
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[2])},
/* list of configuration attributes in a list */
{ PAYLOAD_LIST + CONFIGURATION_ATTRIBUTE,
offsetof(private_cp_payload_t, attributes) },
};
/*
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Next Payload !C! RESERVED ! Payload Length !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! CFG Type ! RESERVED !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! !
~ Configuration Attributes ~
! !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
/**
* Encoding rules to for an IKEv1 configuration payload
*/
static encoding_rule_t encodings_v1[] = {
/* 1 Byte next payload type, stored in the field next_payload */
{ U_INT_8, offsetof(private_cp_payload_t, next_payload) },
/* the critical bit */
{ FLAG, offsetof(private_cp_payload_t, critical) },
/* 7 Bit reserved bits */
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[0]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[1]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[2]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[3]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[4]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[5]) },
{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[6]) },
/* Length of the whole CP payload*/
{ PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
{ U_INT_8, offsetof(private_cp_payload_t, cfg_type) },
/* 1 reserved bytes */
{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[0])},
{ U_INT_16, offsetof(private_cp_payload_t, identifier)},
/* list of configuration attributes in a list */
{ PAYLOAD_LIST + CONFIGURATION_ATTRIBUTE_V1,
offsetof(private_cp_payload_t, attributes) },
};
/*
1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! Next Payload ! RESERVED ! Payload Length !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! CFG Type ! RESERVED ! Identifier !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! !
~ Configuration Attributes ~
! !
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
METHOD(payload_t, verify, status_t,
private_cp_payload_t *this)
{
status_t status = SUCCESS;
enumerator_t *enumerator;
payload_t *attribute;
enumerator = this->attributes->create_enumerator(this->attributes);
while (enumerator->enumerate(enumerator, &attribute))
{
status = attribute->verify(attribute);
if (status != SUCCESS)
{
break;
}
}
enumerator->destroy(enumerator);
return status;
}
METHOD(payload_t, get_encoding_rules, int,
private_cp_payload_t *this, encoding_rule_t **rules)
{
if (this->type == CONFIGURATION)
{
*rules = encodings_v2;
return countof(encodings_v2);
}
*rules = encodings_v1;
return countof(encodings_v1);
}
METHOD(payload_t, get_header_length, int,
private_cp_payload_t *this)
{
return 8;
}
METHOD(payload_t, get_type, payload_type_t,
private_cp_payload_t *this)
{
return this->type;
}
METHOD(payload_t, get_next_type, payload_type_t,
private_cp_payload_t *this)
{
return this->next_payload;
}
METHOD(payload_t, set_next_type, void,
private_cp_payload_t *this,payload_type_t type)
{
this->next_payload = type;
}
/**
* recompute the length of the payload.
*/
static void compute_length(private_cp_payload_t *this)
{
enumerator_t *enumerator;
payload_t *attribute;
this->payload_length = get_header_length(this);
enumerator = this->attributes->create_enumerator(this->attributes);
while (enumerator->enumerate(enumerator, &attribute))
{
this->payload_length += attribute->get_length(attribute);
}
enumerator->destroy(enumerator);
}
METHOD(payload_t, get_length, size_t,
private_cp_payload_t *this)
{
return this->payload_length;
}
METHOD(cp_payload_t, create_attribute_enumerator, enumerator_t*,
private_cp_payload_t *this)
{
return this->attributes->create_enumerator(this->attributes);
}
METHOD(cp_payload_t, add_attribute, void,
private_cp_payload_t *this, configuration_attribute_t *attribute)
{
this->attributes->insert_last(this->attributes, attribute);
compute_length(this);
}
METHOD(cp_payload_t, get_config_type, config_type_t,
private_cp_payload_t *this)
{
return this->cfg_type;
}
METHOD(cp_payload_t, get_identifier, u_int16_t,
private_cp_payload_t *this)
{
return this->identifier;
}
METHOD(cp_payload_t, set_identifier, void,
private_cp_payload_t *this, u_int16_t identifier)
{
this->identifier = identifier;
}
METHOD2(payload_t, cp_payload_t, destroy, void,
private_cp_payload_t *this)
{
this->attributes->destroy_offset(this->attributes,
offsetof(configuration_attribute_t, destroy));
free(this);
}
/*
* Described in header.
*/
cp_payload_t *cp_payload_create_type(payload_type_t type, config_type_t cfg_type)
{
private_cp_payload_t *this;
INIT(this,
.public = {
.payload_interface = {
.verify = _verify,
.get_encoding_rules = _get_encoding_rules,
.get_header_length = _get_header_length,
.get_length = _get_length,
.get_next_type = _get_next_type,
.set_next_type = _set_next_type,
.get_type = _get_type,
.destroy = _destroy,
},
.create_attribute_enumerator = _create_attribute_enumerator,
.add_attribute = _add_attribute,
.get_type = _get_config_type,
.get_identifier = _get_identifier,
.set_identifier = _set_identifier,
.destroy = _destroy,
},
.next_payload = NO_PAYLOAD,
.payload_length = get_header_length(this),
.attributes = linked_list_create(),
.cfg_type = cfg_type,
.type = type,
);
return &this->public;
}
/*
* Described in header.
*/
cp_payload_t *cp_payload_create(payload_type_t type)
{
return cp_payload_create_type(type, CFG_REQUEST);
}
|
