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) 2012 Tobias Brunner
* Copyright (C) 2005-2007 Martin Willi
* 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.
*/
/**
* @defgroup ike_cfg ike_cfg
* @{ @ingroup config
*/
#ifndef IKE_CFG_H_
#define IKE_CFG_H_
typedef enum ike_version_t ike_version_t;
typedef enum fragmentation_t fragmentation_t;
typedef struct ike_cfg_t ike_cfg_t;
#include <library.h>
#include <networking/host.h>
#include <collections/linked_list.h>
#include <utils/identification.h>
#include <config/proposal.h>
#include <crypto/diffie_hellman.h>
/**
* IKE version.
*/
enum ike_version_t {
/** any version */
IKE_ANY = 0,
/** IKE version 1 */
IKEV1 = 1,
/** IKE version 2 */
IKEV2 = 2,
};
/**
* Proprietary IKEv1 fragmentation
*/
enum fragmentation_t {
/** disable fragmentation */
FRAGMENTATION_NO,
/** enable fragmentation if supported by peer */
FRAGMENTATION_YES,
/** force use of fragmentation (even for the first message) */
FRAGMENTATION_FORCE,
};
/**
* enum strings fro ike_version_t
*/
extern enum_name_t *ike_version_names;
/**
* An ike_cfg_t defines the rules to set up an IKE_SA.
*
* @see peer_cfg_t to get an overview over the configurations.
*/
struct ike_cfg_t {
/**
* Get the IKE version to use with this configuration.
*
* @return IKE major version
*/
ike_version_t (*get_version)(ike_cfg_t *this);
/**
* Resolve the local address to use for initiation.
*
* @param family address family to prefer, or AF_UNSPEC
* @return resolved host, NULL on error
*/
host_t* (*resolve_me)(ike_cfg_t *this, int family);
/**
* Resolve the remote address to use for initiation.
*
* @param family address family to prefer, or AF_UNSPEC
* @return resolved host, NULL on error
*/
host_t* (*resolve_other)(ike_cfg_t *this, int family);
/**
* Check how good a host matches to the configured local address.
*
* @param host host to check match quality
* @return quality of the match, 0 if not matching at all
*/
u_int (*match_me)(ike_cfg_t *this, host_t *host);
/**
* Check how good a host matches to the configured remote address.
*
* @param host host to check match quality
* @return quality of the match, 0 if not matching at all
*/
u_int (*match_other)(ike_cfg_t *this, host_t *host);
/**
* Get own address.
*
* @return string of address/DNS name
*/
char* (*get_my_addr) (ike_cfg_t *this);
/**
* Get peer's address.
*
* @return string of address/DNS name
*/
char* (*get_other_addr) (ike_cfg_t *this);
/**
* Get the port to use as our source port.
*
* @return source address port, host order
*/
u_int16_t (*get_my_port)(ike_cfg_t *this);
/**
* Get the port to use as destination port.
*
* @return destination address, host order
*/
u_int16_t (*get_other_port)(ike_cfg_t *this);
/**
* Get the DSCP value to use for IKE packets send from connections.
*
* @return DSCP value
*/
u_int8_t (*get_dscp)(ike_cfg_t *this);
/**
* Adds a proposal to the list.
*
* The first added proposal has the highest priority, the last
* added the lowest.
*
* @param proposal proposal to add
*/
void (*add_proposal) (ike_cfg_t *this, proposal_t *proposal);
/**
* Returns a list of all supported proposals.
*
* Returned list and its proposals must be destroyed after use.
*
* @return list containing all the proposals
*/
linked_list_t* (*get_proposals) (ike_cfg_t *this);
/**
* Select a proposed from suggested proposals.
*
* Returned proposal must be destroyed after use.
*
* @param proposals list of proposals to select from
* @param private accept algorithms from a private range
* @return selected proposal, or NULL if none matches.
*/
proposal_t *(*select_proposal) (ike_cfg_t *this, linked_list_t *proposals,
bool private);
/**
* Should we send a certificate request in IKE_SA_INIT?
*
* @return certificate request sending policy
*/
bool (*send_certreq) (ike_cfg_t *this);
/**
* Enforce UDP encapsulation by faking NATD notifies?
*
* @return TRUE to enforce UDP encapsulation
*/
bool (*force_encap) (ike_cfg_t *this);
/**
* Use proprietary IKEv1 fragmentation
*
* @return TRUE to use fragmentation
*/
fragmentation_t (*fragmentation) (ike_cfg_t *this);
/**
* Get the DH group to use for IKE_SA setup.
*
* @return dh group to use for initialization
*/
diffie_hellman_group_t (*get_dh_group)(ike_cfg_t *this);
/**
* Check if two IKE configs are equal.
*
* @param other other to check for equality
* @return TRUE if other equal to this
*/
bool (*equals)(ike_cfg_t *this, ike_cfg_t *other);
/**
* Increase reference count.
*
* @return reference to this
*/
ike_cfg_t* (*get_ref) (ike_cfg_t *this);
/**
* Destroys a ike_cfg_t object.
*
* Decrements the internal reference counter and
* destroys the ike_cfg when it reaches zero.
*/
void (*destroy) (ike_cfg_t *this);
};
/**
* Creates a ike_cfg_t object.
*
* Supplied hosts become owned by ike_cfg, strings get cloned.
*
* me and other are comma separated lists of IP addresses, DNS names, IP ranges
* or subnets. When initiating, the first non-range/subnet address is used
* as address. When responding, a match is performed against all items in the
* list.
*
* @param version IKE major version to use for this config
* @param certreq TRUE to send a certificate request
* @param force_encap enforce UDP encapsulation by faking NATD notify
* @param me address/DNS name of local peer
* @param my_port IKE port to use as source, 500 uses IKEv2 port floating
* @param other address/DNS name of remote peer
* @param other_port IKE port to use as dest, 500 uses IKEv2 port floating
* @param fragmentation use IKEv1 fragmentation
* @param dscp DSCP value to send IKE packets with
* @return ike_cfg_t object.
*/
ike_cfg_t *ike_cfg_create(ike_version_t version, bool certreq, bool force_encap,
char *me, u_int16_t my_port,
char *other, u_int16_t other_port,
fragmentation_t fragmentation, u_int8_t dscp);
#endif /** IKE_CFG_H_ @}*/
|
