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/*
* Copyright (C) 2008 Martin Willi
* 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 "stroke_shared_key.h"
#include <utils/linked_list.h>
typedef struct private_stroke_shared_key_t private_stroke_shared_key_t;
/**
* private data of shared_key
*/
struct private_stroke_shared_key_t {
/**
* implements shared_key_t
*/
stroke_shared_key_t public;
/**
* type of this key
*/
shared_key_type_t type;
/**
* data of the key
*/
chunk_t key;
/**
* list of key owners, as identification_t
*/
linked_list_t *owners;
/**
* reference counter
*/
refcount_t ref;
};
/**
* Implementation of shared_key_t.get_type.
*/
static shared_key_type_t get_type(private_stroke_shared_key_t *this)
{
return this->type;
}
/**
* Implementation of shared_key_t.get_ref.
*/
static private_stroke_shared_key_t* get_ref(private_stroke_shared_key_t *this)
{
ref_get(&this->ref);
return this;
}
/**
* Implementation of shared_key_t.get_key.
*/
static chunk_t get_key(private_stroke_shared_key_t *this)
{
return this->key;
}
/**
* Implementation of stroke_shared_key_t.has_owner.
*/
static id_match_t has_owner(private_stroke_shared_key_t *this, identification_t *owner)
{
enumerator_t *enumerator;
id_match_t match, best = ID_MATCH_NONE;
identification_t *current;
enumerator = this->owners->create_enumerator(this->owners);
while (enumerator->enumerate(enumerator, ¤t))
{
match = owner->matches(owner, current);
if (match > best)
{
best = match;
}
}
enumerator->destroy(enumerator);
return best;
}
/**
* Implementation of stroke_shared_key_t.add_owner.
*/
static void add_owner(private_stroke_shared_key_t *this, identification_t *owner)
{
this->owners->insert_last(this->owners, owner);
}
/**
* Implementation of stroke_shared_key_t.destroy
*/
static void destroy(private_stroke_shared_key_t *this)
{
if (ref_put(&this->ref))
{
this->owners->destroy_offset(this->owners, offsetof(identification_t, destroy));
chunk_free(&this->key);
free(this);
}
}
/**
* create a shared key
*/
stroke_shared_key_t *stroke_shared_key_create(shared_key_type_t type, chunk_t key)
{
private_stroke_shared_key_t *this = malloc_thing(private_stroke_shared_key_t);
this->public.shared.get_type = (shared_key_type_t(*)(shared_key_t*))get_type;
this->public.shared.get_key = (chunk_t(*)(shared_key_t*))get_key;
this->public.shared.get_ref = (shared_key_t*(*)(shared_key_t*))get_ref;
this->public.shared.destroy = (void(*)(shared_key_t*))destroy;
this->public.add_owner = (void(*)(stroke_shared_key_t*, identification_t *owner))add_owner;
this->public.has_owner = (id_match_t(*)(stroke_shared_key_t*, identification_t *owner))has_owner;
this->owners = linked_list_create();
this->type = type;
this->key = key;
this->ref = 1;
return &this->public;
}
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