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/**
* @file policy.c
*
* @brief Implementation of policy_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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 "policy.h"
#include <utils/linked_list.h>
#include <utils/allocator.h>
#include <utils/identification.h>
#include <utils/logger.h>
typedef struct private_policy_t private_policy_t;
/**
* Private data of an policy_t object
*/
struct private_policy_t {
/**
* Public part
*/
policy_t public;
/**
* id to use to identify us
*/
identification_t *my_id;
/**
* allowed id for other
*/
identification_t *other_id;
/**
* list for all proposals
*/
linked_list_t *proposals;
/**
* list for traffic selectors for my site
*/
linked_list_t *my_ts;
/**
* list for traffic selectors for others site
*/
linked_list_t *other_ts;
/**
* select_traffic_selectors for both
*/
linked_list_t *(*select_traffic_selectors) (private_policy_t *,linked_list_t*,linked_list_t*);
};
/**
* Implementation of policy_t.get_my_id
*/
static identification_t *get_my_id(private_policy_t *this)
{
return this->my_id;
}
/**
* Implementation of policy_t.get_other_id
*/
static identification_t *get_other_id(private_policy_t *this)
{
return this->other_id;
}
/**
* Implementation of policy_t.get_my_traffic_selectors
*/
static linked_list_t *get_my_traffic_selectors(private_policy_t *this)
{
return this->my_ts;
}
/**
* Implementation of policy_t.get_other_traffic_selectors
*/
static linked_list_t *get_other_traffic_selectors(private_policy_t *this, traffic_selector_t **traffic_selectors[])
{
return this->other_ts;
}
/**
* Implementation of private_policy_t.select_my_traffic_selectors
*/
static linked_list_t *select_my_traffic_selectors(private_policy_t *this, linked_list_t *supplied)
{
return this->select_traffic_selectors(this, this->my_ts, supplied);
}
/**
* Implementation of private_policy_t.select_other_traffic_selectors
*/
static linked_list_t *select_other_traffic_selectors(private_policy_t *this, linked_list_t *supplied)
{
return this->select_traffic_selectors(this, this->other_ts, supplied);
}
/**
* Implementation of private_policy_t.select_traffic_selectors
*/
static linked_list_t *select_traffic_selectors(private_policy_t *this, linked_list_t *stored, linked_list_t *supplied)
{
iterator_t *supplied_iter, *stored_iter;
traffic_selector_t *supplied_ts, *stored_ts, *selected_ts;
linked_list_t *selected = linked_list_create();
stored_iter = stored->create_iterator(stored, TRUE);
supplied_iter = supplied->create_iterator(supplied, TRUE);
/* iterate over all stored selectors */
while (stored_iter->has_next(stored_iter))
{
stored_iter->current(stored_iter, (void**)&stored_ts);
supplied_iter->reset(supplied_iter);
/* iterate over all supplied traffic selectors */
while (supplied_iter->has_next(supplied_iter))
{
supplied_iter->current(supplied_iter, (void**)&supplied_ts);
selected_ts = stored_ts->get_subset(stored_ts, supplied_ts);
if (selected_ts)
{
/* got a match, add to list */
selected->insert_last(selected, (void*)selected_ts);
}
}
}
stored_iter->destroy(stored_iter);
supplied_iter->destroy(supplied_iter);
return selected;
}
/**
* Implementation of policy_t.get_proposal_iterator
*/
static linked_list_t *get_proposals(private_policy_t *this)
{
return this->proposals;
}
/**
* Implementation of policy_t.select_proposal
*/
static proposal_t *select_proposal(private_policy_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->has_next(stored_iter))
{
supplied_iter->reset(supplied_iter);
stored_iter->current(stored_iter, (void**)&stored);
while (supplied_iter->has_next(supplied_iter))
{
supplied_iter->current(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 policy_t.add_my_traffic_selector
*/
static void add_my_traffic_selector(private_policy_t *this, traffic_selector_t *traffic_selector)
{
this->my_ts->insert_last(this->my_ts, (void*)traffic_selector);
}
/**
* Implementation of policy_t.add_other_traffic_selector
*/
static void add_other_traffic_selector(private_policy_t *this, traffic_selector_t *traffic_selector)
{
this->other_ts->insert_last(this->other_ts, (void*)traffic_selector);
}
/**
* Implementation of policy_t.add_proposal
*/
static void add_proposal(private_policy_t *this, proposal_t *proposal)
{
this->proposals->insert_last(this->proposals, (void*)proposal);
}
/**
* Implements policy_t.destroy.
*/
static status_t destroy(private_policy_t *this)
{
proposal_t *proposal;
traffic_selector_t *traffic_selector;
/* delete proposals */
while(this->proposals->remove_last(this->proposals, (void**)&proposal) == SUCCESS)
{
proposal->destroy(proposal);
}
this->proposals->destroy(this->proposals);
/* delete traffic selectors */
while(this->my_ts->remove_last(this->my_ts, (void**)&traffic_selector) == SUCCESS)
{
traffic_selector->destroy(traffic_selector);
}
this->my_ts->destroy(this->my_ts);
/* delete traffic selectors */
while(this->other_ts->remove_last(this->other_ts, (void**)&traffic_selector) == SUCCESS)
{
traffic_selector->destroy(traffic_selector);
}
this->other_ts->destroy(this->other_ts);
/* delete ids */
this->my_id->destroy(this->my_id);
this->other_id->destroy(this->other_id);
allocator_free(this);
return SUCCESS;
}
/*
* Described in header-file
*/
policy_t *policy_create(identification_t *my_id, identification_t *other_id)
{
private_policy_t *this = allocator_alloc_thing(private_policy_t);
/* public functions */
this->public.get_my_id = (identification_t*(*)(policy_t*))get_my_id;
this->public.get_other_id = (identification_t*(*)(policy_t*))get_other_id;
this->public.get_my_traffic_selectors = (linked_list_t*(*)(policy_t*))get_my_traffic_selectors;
this->public.select_my_traffic_selectors = (linked_list_t*(*)(policy_t*,linked_list_t*))select_my_traffic_selectors;
this->public.get_other_traffic_selectors = (linked_list_t*(*)(policy_t*))get_other_traffic_selectors;
this->public.select_other_traffic_selectors = (linked_list_t*(*)(policy_t*,linked_list_t*))select_other_traffic_selectors;
this->public.get_proposals = (linked_list_t*(*)(policy_t*))get_proposals;
this->public.select_proposal = (proposal_t*(*)(policy_t*,linked_list_t*))select_proposal;
this->public.add_my_traffic_selector = (void(*)(policy_t*,traffic_selector_t*))add_my_traffic_selector;
this->public.add_other_traffic_selector = (void(*)(policy_t*,traffic_selector_t*))add_other_traffic_selector;
this->public.add_proposal = (void(*)(policy_t*,proposal_t*))add_proposal;
this->public.destroy = (void(*)(policy_t*))destroy;
/* apply init values */
this->my_id = my_id;
this->other_id = other_id;
/* init private members*/
this->select_traffic_selectors = select_traffic_selectors;
this->proposals = linked_list_create();
this->my_ts = linked_list_create();
this->other_ts = linked_list_create();
return (&this->public);
}
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