299 lines
8.0 KiB
C
299 lines
8.0 KiB
C
/**
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* @file policy.c
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*
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* @brief Implementation of policy_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "policy.h"
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#include <utils/linked_list.h>
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#include <utils/allocator.h>
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#include <utils/identification.h>
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#include <utils/logger.h>
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typedef struct private_policy_t private_policy_t;
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/**
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* Private data of an policy_t object
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*/
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struct private_policy_t {
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/**
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* Public part
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*/
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policy_t public;
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/**
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* id to use to identify us
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*/
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identification_t *my_id;
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/**
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* allowed id for other
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*/
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identification_t *other_id;
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/**
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* list for all proposals
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*/
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linked_list_t *proposals;
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/**
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* list for traffic selectors for my site
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*/
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linked_list_t *my_ts;
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/**
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* list for traffic selectors for others site
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*/
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linked_list_t *other_ts;
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/**
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* select_traffic_selectors for both
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*/
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linked_list_t *(*select_traffic_selectors) (private_policy_t *,linked_list_t*,linked_list_t*);
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};
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/**
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* Implementation of policy_t.get_my_id
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*/
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static identification_t *get_my_id(private_policy_t *this)
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{
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return this->my_id;
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}
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/**
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* Implementation of policy_t.get_other_id
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*/
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static identification_t *get_other_id(private_policy_t *this)
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{
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return this->other_id;
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}
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/**
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* Implementation of policy_t.get_my_traffic_selectors
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*/
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static linked_list_t *get_my_traffic_selectors(private_policy_t *this)
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{
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return this->my_ts;
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}
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/**
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* Implementation of policy_t.get_other_traffic_selectors
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*/
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static linked_list_t *get_other_traffic_selectors(private_policy_t *this, traffic_selector_t **traffic_selectors[])
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{
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return this->other_ts;
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}
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/**
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* Implementation of private_policy_t.select_my_traffic_selectors
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*/
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static linked_list_t *select_my_traffic_selectors(private_policy_t *this, linked_list_t *supplied)
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{
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return this->select_traffic_selectors(this, this->my_ts, supplied);
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}
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/**
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* Implementation of private_policy_t.select_other_traffic_selectors
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*/
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static linked_list_t *select_other_traffic_selectors(private_policy_t *this, linked_list_t *supplied)
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{
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return this->select_traffic_selectors(this, this->other_ts, supplied);
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}
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/**
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* Implementation of private_policy_t.select_traffic_selectors
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*/
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static linked_list_t *select_traffic_selectors(private_policy_t *this, linked_list_t *stored, linked_list_t *supplied)
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{
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iterator_t *supplied_iter, *stored_iter;
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traffic_selector_t *supplied_ts, *stored_ts, *selected_ts;
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linked_list_t *selected = linked_list_create();
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stored_iter = stored->create_iterator(stored, TRUE);
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supplied_iter = supplied->create_iterator(supplied, TRUE);
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/* iterate over all stored selectors */
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while (stored_iter->has_next(stored_iter))
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{
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stored_iter->current(stored_iter, (void**)&stored_ts);
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supplied_iter->reset(supplied_iter);
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/* iterate over all supplied traffic selectors */
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while (supplied_iter->has_next(supplied_iter))
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{
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supplied_iter->current(supplied_iter, (void**)&supplied_ts);
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selected_ts = stored_ts->get_subset(stored_ts, supplied_ts);
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if (selected_ts)
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{
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/* got a match, add to list */
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selected->insert_last(selected, (void*)selected_ts);
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}
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}
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}
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return selected;
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}
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/**
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* Implementation of policy_t.get_proposal_iterator
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*/
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static linked_list_t *get_proposals(private_policy_t *this)
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{
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return this->proposals;
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}
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/**
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* Implementation of policy_t.select_proposal
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*/
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static proposal_t *select_proposal(private_policy_t *this, linked_list_t *proposals)
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{
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iterator_t *stored_iter, *supplied_iter;
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proposal_t *stored, *supplied, *selected;
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stored_iter = this->proposals->create_iterator(this->proposals, TRUE);
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supplied_iter = proposals->create_iterator(proposals, TRUE);
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/* compare all stored proposals with all supplied. Stored ones are preferred. */
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while (stored_iter->has_next(stored_iter))
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{
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supplied_iter->reset(supplied_iter);
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stored_iter->current(stored_iter, (void**)&stored);
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while (supplied_iter->has_next(supplied_iter))
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{
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supplied_iter->current(supplied_iter, (void**)&supplied);
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selected = stored->select(stored, supplied);
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if (selected)
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{
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/* they match, return */
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return selected;
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}
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}
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}
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/* no proposal match :-(, will result in a NO_PROPOSAL_CHOSEN... */
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stored_iter->destroy(stored_iter);
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supplied_iter->destroy(supplied_iter);
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return NULL;
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}
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/**
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* Implementation of policy_t.add_my_traffic_selector
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*/
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static void add_my_traffic_selector(private_policy_t *this, traffic_selector_t *traffic_selector)
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{
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this->my_ts->insert_last(this->my_ts, (void*)traffic_selector);
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}
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/**
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* Implementation of policy_t.add_other_traffic_selector
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*/
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static void add_other_traffic_selector(private_policy_t *this, traffic_selector_t *traffic_selector)
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{
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this->other_ts->insert_last(this->other_ts, (void*)traffic_selector);
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}
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/**
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* Implementation of policy_t.add_proposal
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*/
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static void add_proposal(private_policy_t *this, proposal_t *proposal)
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{
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this->proposals->insert_last(this->proposals, (void*)proposal);
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}
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/**
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* Implements policy_t.destroy.
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*/
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static status_t destroy(private_policy_t *this)
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{
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proposal_t *proposal;
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traffic_selector_t *traffic_selector;
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/* delete proposals */
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while(this->proposals->remove_last(this->proposals, (void**)&proposal) == SUCCESS)
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{
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proposal->destroy(proposal);
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}
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this->proposals->destroy(this->proposals);
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/* delete traffic selectors */
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while(this->my_ts->remove_last(this->my_ts, (void**)&traffic_selector) == SUCCESS)
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{
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traffic_selector->destroy(traffic_selector);
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}
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this->my_ts->destroy(this->my_ts);
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/* delete traffic selectors */
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while(this->other_ts->remove_last(this->other_ts, (void**)&traffic_selector) == SUCCESS)
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{
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traffic_selector->destroy(traffic_selector);
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}
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this->other_ts->destroy(this->other_ts);
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/* delete ids */
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this->my_id->destroy(this->my_id);
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this->other_id->destroy(this->other_id);
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allocator_free(this);
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return SUCCESS;
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}
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/*
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* Described in header-file
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*/
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policy_t *policy_create(identification_t *my_id, identification_t *other_id)
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{
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private_policy_t *this = allocator_alloc_thing(private_policy_t);
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/* public functions */
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this->public.get_my_id = (identification_t*(*)(policy_t*))get_my_id;
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this->public.get_other_id = (identification_t*(*)(policy_t*))get_other_id;
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this->public.get_my_traffic_selectors = (linked_list_t*(*)(policy_t*))get_my_traffic_selectors;
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this->public.select_my_traffic_selectors = (linked_list_t*(*)(policy_t*,linked_list_t*))select_my_traffic_selectors;
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this->public.get_other_traffic_selectors = (linked_list_t*(*)(policy_t*))get_other_traffic_selectors;
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this->public.select_other_traffic_selectors = (linked_list_t*(*)(policy_t*,linked_list_t*))select_other_traffic_selectors;
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this->public.get_proposals = (linked_list_t*(*)(policy_t*))get_proposals;
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this->public.select_proposal = (proposal_t*(*)(policy_t*,linked_list_t*))select_proposal;
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this->public.add_my_traffic_selector = (void(*)(policy_t*,traffic_selector_t*))add_my_traffic_selector;
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this->public.add_other_traffic_selector = (void(*)(policy_t*,traffic_selector_t*))add_other_traffic_selector;
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this->public.add_proposal = (void(*)(policy_t*,proposal_t*))add_proposal;
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this->public.destroy = (void(*)(policy_t*))destroy;
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/* apply init values */
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this->my_id = my_id;
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this->other_id = other_id;
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/* init private members*/
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this->select_traffic_selectors = select_traffic_selectors;
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this->proposals = linked_list_create();
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this->my_ts = linked_list_create();
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this->other_ts = linked_list_create();
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return (&this->public);
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}
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