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156f7e9b | 1 | /* |
434e530f | 2 | * Copyright (C) 2012-2013 Tobias Brunner |
156f7e9b TB |
3 | * Hochschule fuer Technik Rapperswil |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | * for more details. | |
14 | */ | |
15 | ||
16 | /** | |
17 | * @defgroup ipsec_types ipsec_types | |
18 | * @{ @ingroup ipsec | |
19 | */ | |
20 | ||
21 | #ifndef IPSEC_TYPES_H_ | |
22 | #define IPSEC_TYPES_H_ | |
23 | ||
24 | typedef enum ipsec_mode_t ipsec_mode_t; | |
25 | typedef enum policy_dir_t policy_dir_t; | |
26 | typedef enum policy_type_t policy_type_t; | |
27 | typedef enum policy_priority_t policy_priority_t; | |
28 | typedef enum ipcomp_transform_t ipcomp_transform_t; | |
29 | typedef struct ipsec_sa_cfg_t ipsec_sa_cfg_t; | |
30 | typedef struct lifetime_cfg_t lifetime_cfg_t; | |
31 | typedef struct mark_t mark_t; | |
32 | ||
33 | #include <library.h> | |
34 | ||
35 | /** | |
36 | * Mode of an IPsec SA. | |
37 | */ | |
38 | enum ipsec_mode_t { | |
39 | /** not using any encapsulation */ | |
40 | MODE_NONE = 0, | |
41 | /** transport mode, no inner address */ | |
42 | MODE_TRANSPORT = 1, | |
43 | /** tunnel mode, inner and outer addresses */ | |
44 | MODE_TUNNEL, | |
45 | /** BEET mode, tunnel mode but fixed, bound inner addresses */ | |
46 | MODE_BEET, | |
47 | /** passthrough policy for traffic without an IPsec SA */ | |
48 | MODE_PASS, | |
49 | /** drop policy discarding traffic */ | |
50 | MODE_DROP | |
51 | }; | |
52 | ||
53 | /** | |
54 | * enum names for ipsec_mode_t. | |
55 | */ | |
56 | extern enum_name_t *ipsec_mode_names; | |
57 | ||
58 | /** | |
59 | * Direction of a policy. These are equal to those | |
60 | * defined in xfrm.h, but we want to stay implementation | |
61 | * neutral here. | |
62 | */ | |
63 | enum policy_dir_t { | |
64 | /** Policy for inbound traffic */ | |
65 | POLICY_IN = 0, | |
66 | /** Policy for outbound traffic */ | |
67 | POLICY_OUT = 1, | |
68 | /** Policy for forwarded traffic */ | |
69 | POLICY_FWD = 2, | |
70 | }; | |
71 | ||
72 | /** | |
73 | * enum names for policy_dir_t. | |
74 | */ | |
75 | extern enum_name_t *policy_dir_names; | |
76 | ||
77 | /** | |
78 | * Type of a policy. | |
79 | */ | |
80 | enum policy_type_t { | |
81 | /** Normal IPsec policy */ | |
82 | POLICY_IPSEC = 1, | |
83 | /** Passthrough policy (traffic is ignored by IPsec) */ | |
84 | POLICY_PASS, | |
85 | /** Drop policy (traffic is discarded) */ | |
86 | POLICY_DROP, | |
87 | }; | |
88 | ||
89 | /** | |
90 | * High-level priority of a policy. | |
91 | */ | |
92 | enum policy_priority_t { | |
479060d2 TB |
93 | /** Priority for passthrough policies */ |
94 | POLICY_PRIORITY_PASS, | |
95 | /** Priority for regular IPsec policies */ | |
156f7e9b TB |
96 | POLICY_PRIORITY_DEFAULT, |
97 | /** Priority for trap policies */ | |
98 | POLICY_PRIORITY_ROUTED, | |
99 | /** Priority for fallback drop policies */ | |
100 | POLICY_PRIORITY_FALLBACK, | |
101 | }; | |
102 | ||
103 | /** | |
104 | * IPComp transform IDs, as in RFC 4306 | |
105 | */ | |
106 | enum ipcomp_transform_t { | |
107 | IPCOMP_NONE = 0, | |
108 | IPCOMP_OUI = 1, | |
109 | IPCOMP_DEFLATE = 2, | |
110 | IPCOMP_LZS = 3, | |
111 | IPCOMP_LZJH = 4, | |
112 | }; | |
113 | ||
114 | /** | |
115 | * enum strings for ipcomp_transform_t. | |
116 | */ | |
117 | extern enum_name_t *ipcomp_transform_names; | |
118 | ||
119 | /** | |
120 | * This struct contains details about IPsec SA(s) tied to a policy. | |
121 | */ | |
122 | struct ipsec_sa_cfg_t { | |
123 | /** mode of SA (tunnel, transport) */ | |
124 | ipsec_mode_t mode; | |
125 | /** unique ID */ | |
126 | u_int32_t reqid; | |
4b09bd6c MW |
127 | /** number of policies of the same kind (in/out/fwd) attached to SA */ |
128 | u_int32_t policy_count; | |
156f7e9b TB |
129 | /** details about ESP/AH */ |
130 | struct { | |
131 | /** TRUE if this protocol is used */ | |
132 | bool use; | |
133 | /** SPI for ESP/AH */ | |
134 | u_int32_t spi; | |
135 | } esp, ah; | |
136 | /** details about IPComp */ | |
137 | struct { | |
138 | /** the IPComp transform used */ | |
139 | u_int16_t transform; | |
140 | /** CPI for IPComp */ | |
141 | u_int16_t cpi; | |
142 | } ipcomp; | |
143 | }; | |
144 | ||
145 | /** | |
146 | * A lifetime_cfg_t defines the lifetime limits of an SA. | |
147 | * | |
148 | * Set any of these values to 0 to ignore. | |
149 | */ | |
150 | struct lifetime_cfg_t { | |
151 | struct { | |
152 | /** Limit before the SA gets invalid. */ | |
153 | u_int64_t life; | |
154 | /** Limit before the SA gets rekeyed. */ | |
155 | u_int64_t rekey; | |
156 | /** The range of a random value subtracted from rekey. */ | |
157 | u_int64_t jitter; | |
158 | } time, bytes, packets; | |
159 | }; | |
160 | ||
161 | /** | |
162 | * A mark_t defines an optional mark in an IPsec SA. | |
163 | */ | |
164 | struct mark_t { | |
165 | /** Mark value */ | |
166 | u_int32_t value; | |
167 | /** Mark mask */ | |
168 | u_int32_t mask; | |
169 | }; | |
170 | ||
171 | /** | |
85b23888 | 172 | * Special mark value that uses a unique mark for each CHILD_SA |
156f7e9b | 173 | */ |
85b23888 | 174 | #define MARK_UNIQUE (0xFFFFFFFF) |
156f7e9b | 175 | |
434e530f | 176 | /** |
dd438ee2 | 177 | * Try to parse a mark_t from the given string of the form mark[/mask]. |
434e530f TB |
178 | * |
179 | * @param value string to parse | |
180 | * @param mark mark to fill | |
181 | * @return TRUE if parsing was successful | |
182 | */ | |
183 | bool mark_from_string(const char *value, mark_t *mark); | |
184 | ||
156f7e9b | 185 | #endif /** IPSEC_TYPES_H_ @}*/ |