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/*
* Copyright (C) 2012-2016 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
*/
uint16_t (*get_my_port)(ike_cfg_t *this);
/**
* Get the port to use as destination port.
*
* @return destination address, host order
*/
uint16_t (*get_other_port)(ike_cfg_t *this);
/**
* Get the DSCP value to use for IKE packets send from connections.
*
* @return DSCP value
*/
uint8_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. It is safe to add NULL as proposal, which has no
* effect.
*
* @param proposal proposal to add, or NULL
*/
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 proposal from a list of supplied proposals.
*
* Returned proposal must be destroyed after use.
*
* @param proposals list of proposals to select from
* @param private accept algorithms from a private range
* @param prefer_self whether to prefer configured or supplied proposals
* @return selected proposal, or NULL if none matches.
*/
proposal_t *(*select_proposal) (ike_cfg_t *this, linked_list_t *proposals,
bool private, bool prefer_self);
/**
* 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, uint16_t my_port,
char *other, uint16_t other_port,
fragmentation_t fragmentation, uint8_t dscp);
/**
* Determine the address family of the local or remote address(es). If multiple
* families are configured AF_UNSPEC is returned. %any is ignored (%any4|6 are
* not though).
*
* @param this ike config to check
* @param local TRUE to check local addresses, FALSE for remote
* @return address family of address(es) if distinct
*/
int ike_cfg_get_family(ike_cfg_t *this, bool local);
#endif /** IKE_CFG_H_ @}*/
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