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Diffstat (limited to 'src/libstrongswan/ipsec/ipsec_types.h')
| -rw-r--r-- | src/libstrongswan/ipsec/ipsec_types.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/libstrongswan/ipsec/ipsec_types.h b/src/libstrongswan/ipsec/ipsec_types.h new file mode 100644 index 000000000..32e55bc50 --- /dev/null +++ b/src/libstrongswan/ipsec/ipsec_types.h @@ -0,0 +1,172 @@ +/* + * Copyright (C) 2012 Tobias Brunner + * 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 ipsec_types ipsec_types + * @{ @ingroup ipsec + */ + +#ifndef IPSEC_TYPES_H_ +#define IPSEC_TYPES_H_ + +typedef enum ipsec_mode_t ipsec_mode_t; +typedef enum policy_dir_t policy_dir_t; +typedef enum policy_type_t policy_type_t; +typedef enum policy_priority_t policy_priority_t; +typedef enum ipcomp_transform_t ipcomp_transform_t; +typedef struct ipsec_sa_cfg_t ipsec_sa_cfg_t; +typedef struct lifetime_cfg_t lifetime_cfg_t; +typedef struct mark_t mark_t; + +#include <library.h> + +/** + * Mode of an IPsec SA. + */ +enum ipsec_mode_t { + /** not using any encapsulation */ + MODE_NONE = 0, + /** transport mode, no inner address */ + MODE_TRANSPORT = 1, + /** tunnel mode, inner and outer addresses */ + MODE_TUNNEL, + /** BEET mode, tunnel mode but fixed, bound inner addresses */ + MODE_BEET, + /** passthrough policy for traffic without an IPsec SA */ + MODE_PASS, + /** drop policy discarding traffic */ + MODE_DROP +}; + +/** + * enum names for ipsec_mode_t. + */ +extern enum_name_t *ipsec_mode_names; + +/** + * Direction of a policy. These are equal to those + * defined in xfrm.h, but we want to stay implementation + * neutral here. + */ +enum policy_dir_t { + /** Policy for inbound traffic */ + POLICY_IN = 0, + /** Policy for outbound traffic */ + POLICY_OUT = 1, + /** Policy for forwarded traffic */ + POLICY_FWD = 2, +}; + +/** + * enum names for policy_dir_t. + */ +extern enum_name_t *policy_dir_names; + +/** + * Type of a policy. + */ +enum policy_type_t { + /** Normal IPsec policy */ + POLICY_IPSEC = 1, + /** Passthrough policy (traffic is ignored by IPsec) */ + POLICY_PASS, + /** Drop policy (traffic is discarded) */ + POLICY_DROP, +}; + +/** + * High-level priority of a policy. + */ +enum policy_priority_t { + /** Default priority */ + POLICY_PRIORITY_DEFAULT, + /** Priority for trap policies */ + POLICY_PRIORITY_ROUTED, + /** Priority for fallback drop policies */ + POLICY_PRIORITY_FALLBACK, +}; + +/** + * IPComp transform IDs, as in RFC 4306 + */ +enum ipcomp_transform_t { + IPCOMP_NONE = 0, + IPCOMP_OUI = 1, + IPCOMP_DEFLATE = 2, + IPCOMP_LZS = 3, + IPCOMP_LZJH = 4, +}; + +/** + * enum strings for ipcomp_transform_t. + */ +extern enum_name_t *ipcomp_transform_names; + +/** + * This struct contains details about IPsec SA(s) tied to a policy. + */ +struct ipsec_sa_cfg_t { + /** mode of SA (tunnel, transport) */ + ipsec_mode_t mode; + /** unique ID */ + u_int32_t reqid; + /** details about ESP/AH */ + struct { + /** TRUE if this protocol is used */ + bool use; + /** SPI for ESP/AH */ + u_int32_t spi; + } esp, ah; + /** details about IPComp */ + struct { + /** the IPComp transform used */ + u_int16_t transform; + /** CPI for IPComp */ + u_int16_t cpi; + } ipcomp; +}; + +/** + * A lifetime_cfg_t defines the lifetime limits of an SA. + * + * Set any of these values to 0 to ignore. + */ +struct lifetime_cfg_t { + struct { + /** Limit before the SA gets invalid. */ + u_int64_t life; + /** Limit before the SA gets rekeyed. */ + u_int64_t rekey; + /** The range of a random value subtracted from rekey. */ + u_int64_t jitter; + } time, bytes, packets; +}; + +/** + * A mark_t defines an optional mark in an IPsec SA. + */ +struct mark_t { + /** Mark value */ + u_int32_t value; + /** Mark mask */ + u_int32_t mask; +}; + +/** + * Special mark value that uses the reqid of the CHILD_SA as mark + */ +#define MARK_REQID (0xFFFFFFFF) + +#endif /** IPSEC_TYPES_H_ @}*/ |