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/**
* @file ike_cfg.c
*
* @brief Implementation of ike_cfg_t.
*
*/
/*
* 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.
*/
#include "ike_cfg.h"
#include <string.h>
typedef struct private_ike_cfg_t private_ike_cfg_t;
/**
* Private data of an ike_cfg_t object
*/
struct private_ike_cfg_t {
/**
* Public part
*/
ike_cfg_t public;
/**
* Number of references hold by others to this ike_cfg
*/
refcount_t refcount;
/**
* Address of local host
*/
host_t *my_host;
/**
* Address of remote host
*/
host_t *other_host;
/**
* should we send a certificate request?
*/
bool certreq;
/**
* enforce UDP encapsulation
*/
bool force_encap;
/**
* List of proposals to use
*/
linked_list_t *proposals;
};
/**
* Implementation of ike_cfg_t.certreq.
*/
static bool send_certreq(private_ike_cfg_t *this)
{
return this->certreq;
}
/**
* Implementation of ike_cfg_t.force_encap.
*/
static bool force_encap_meth(private_ike_cfg_t *this)
{
return this->force_encap;
}
/**
* Implementation of ike_cfg_t.get_my_host.
*/
static host_t *get_my_host (private_ike_cfg_t *this)
{
return this->my_host;
}
/**
* Implementation of ike_cfg_t.get_other_host.
*/
static host_t *get_other_host (private_ike_cfg_t *this)
{
return this->other_host;
}
/**
* Implementation of ike_cfg_t.add_proposal.
*/
static void add_proposal(private_ike_cfg_t *this, proposal_t *proposal)
{
this->proposals->insert_last(this->proposals, proposal);
}
/**
* Implementation of ike_cfg_t.get_proposals.
*/
static linked_list_t* get_proposals(private_ike_cfg_t *this)
{
iterator_t *iterator;
proposal_t *current;
linked_list_t *proposals = linked_list_create();
iterator = this->proposals->create_iterator(this->proposals, TRUE);
while (iterator->iterate(iterator, (void**)¤t))
{
current = current->clone(current);
proposals->insert_last(proposals, (void*)current);
}
iterator->destroy(iterator);
return proposals;
}
/**
* Implementation of ike_cfg_t.select_proposal.
*/
static proposal_t *select_proposal(private_ike_cfg_t *this,
linked_list_t *proposals)
{
iterator_t *stored_iter, *supplied_iter;
proposal_t *stored, *supplied, *selected;
stored_iter = this->proposals->create_iterator(this->proposals, TRUE);
supplied_iter = proposals->create_iterator(proposals, TRUE);
/* compare all stored proposals with all supplied. Stored ones are preferred.*/
while (stored_iter->iterate(stored_iter, (void**)&stored))
{
supplied_iter->reset(supplied_iter);
while (supplied_iter->iterate(supplied_iter, (void**)&supplied))
{
selected = stored->select(stored, supplied);
if (selected)
{
/* they match, return */
stored_iter->destroy(stored_iter);
supplied_iter->destroy(supplied_iter);
return selected;
}
}
}
/* no proposal match :-(, will result in a NO_PROPOSAL_CHOSEN... */
stored_iter->destroy(stored_iter);
supplied_iter->destroy(supplied_iter);
return NULL;
}
/**
* Implementation of ike_cfg_t.get_dh_group.
*/
static diffie_hellman_group_t get_dh_group(private_ike_cfg_t *this)
{
iterator_t *iterator;
proposal_t *proposal;
algorithm_t *algo;
diffie_hellman_group_t dh_group = MODP_NONE;
iterator = this->proposals->create_iterator(this->proposals, TRUE);
while (iterator->iterate(iterator, (void**)&proposal))
{
if (proposal->get_algorithm(proposal, DIFFIE_HELLMAN_GROUP, &algo))
{
dh_group = algo->algorithm;
break;
}
}
iterator->destroy(iterator);
return dh_group;
}
/**
* Implementation of ike_cfg_t.get_ref.
*/
static void get_ref(private_ike_cfg_t *this)
{
ref_get(&this->refcount);
}
/**
* Implementation of ike_cfg_t.destroy.
*/
static void destroy(private_ike_cfg_t *this)
{
if (ref_put(&this->refcount))
{
this->proposals->destroy_offset(this->proposals,
offsetof(proposal_t, destroy));
this->my_host->destroy(this->my_host);
this->other_host->destroy(this->other_host);
free(this);
}
}
/**
* Described in header.
*/
ike_cfg_t *ike_cfg_create(bool certreq, bool force_encap,
host_t *my_host, host_t *other_host)
{
private_ike_cfg_t *this = malloc_thing(private_ike_cfg_t);
/* public functions */
this->public.send_certreq = (bool(*)(ike_cfg_t*))send_certreq;
this->public.force_encap = (bool (*) (ike_cfg_t *))force_encap_meth;
this->public.get_my_host = (host_t*(*)(ike_cfg_t*))get_my_host;
this->public.get_other_host = (host_t*(*)(ike_cfg_t*))get_other_host;
this->public.add_proposal = (void(*)(ike_cfg_t*, proposal_t*)) add_proposal;
this->public.get_proposals = (linked_list_t*(*)(ike_cfg_t*))get_proposals;
this->public.select_proposal = (proposal_t*(*)(ike_cfg_t*,linked_list_t*))select_proposal;
this->public.get_dh_group = (diffie_hellman_group_t(*)(ike_cfg_t*)) get_dh_group;
this->public.get_ref = (void(*)(ike_cfg_t*))get_ref;
this->public.destroy = (void(*)(ike_cfg_t*))destroy;
/* private variables */
this->refcount = 1;
this->certreq = certreq;
this->force_encap = force_encap;
this->my_host = my_host;
this->other_host = other_host;
this->proposals = linked_list_create();
return &this->public;
}
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