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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 "eap_manager.h"
#include <utils/linked_list.h>
#include <utils/mutex.h>
typedef struct private_eap_manager_t private_eap_manager_t;
typedef struct eap_entry_t eap_entry_t;
/**
* EAP constructor entry
*/
struct eap_entry_t {
/**
* EAP method type, vendor specific if vendor is set
*/
eap_type_t type;
/**
* vendor ID, 0 for default EAP methods
*/
u_int32_t vendor;
/**
* Role of the method returned by the constructor, EAP_SERVER or EAP_PEER
*/
eap_role_t role;
/**
* constructor function to create instance
*/
eap_constructor_t constructor;
};
/**
* private data of eap_manager
*/
struct private_eap_manager_t {
/**
* public functions
*/
eap_manager_t public;
/**
* list of eap_entry_t's
*/
linked_list_t *methods;
/**
* rwlock to lock methods
*/
rwlock_t *lock;
};
/**
* Implementation of eap_manager_t.add_method.
*/
static void add_method(private_eap_manager_t *this, eap_type_t type,
u_int32_t vendor, eap_role_t role,
eap_constructor_t constructor)
{
eap_entry_t *entry = malloc_thing(eap_entry_t);
entry->type = type;
entry->vendor = vendor;
entry->role = role;
entry->constructor = constructor;
this->lock->write_lock(this->lock);
this->methods->insert_last(this->methods, entry);
this->lock->unlock(this->lock);
}
/**
* Implementation of eap_manager_t.remove_method.
*/
static void remove_method(private_eap_manager_t *this, eap_constructor_t constructor)
{
enumerator_t *enumerator;
eap_entry_t *entry;
this->lock->write_lock(this->lock);
enumerator = this->methods->create_enumerator(this->methods);
while (enumerator->enumerate(enumerator, &entry))
{
if (constructor == entry->constructor)
{
this->methods->remove_at(this->methods, enumerator);
free(entry);
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
}
/**
* Implementation of eap_manager_t.create_instance.
*/
static eap_method_t* create_instance(private_eap_manager_t *this,
eap_type_t type, u_int32_t vendor,
eap_role_t role, identification_t *server,
identification_t *peer)
{
enumerator_t *enumerator;
eap_entry_t *entry;
eap_method_t *method = NULL;
this->lock->read_lock(this->lock);
enumerator = this->methods->create_enumerator(this->methods);
while (enumerator->enumerate(enumerator, &entry))
{
if (type == entry->type && vendor == entry->vendor &&
role == entry->role)
{
method = entry->constructor(server, peer);
if (method)
{
break;
}
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
return method;
}
/**
* Implementation of 2008_t.destroy
*/
static void destroy(private_eap_manager_t *this)
{
this->methods->destroy_function(this->methods, free);
this->lock->destroy(this->lock);
free(this);
}
/*
* see header file
*/
eap_manager_t *eap_manager_create()
{
private_eap_manager_t *this = malloc_thing(private_eap_manager_t);
this->public.add_method = (void(*)(eap_manager_t*, eap_type_t type, u_int32_t vendor, eap_role_t role, eap_constructor_t constructor))add_method;
this->public.remove_method = (void(*)(eap_manager_t*, eap_constructor_t constructor))remove_method;
this->public.create_instance = (eap_method_t*(*)(eap_manager_t*, eap_type_t type, u_int32_t vendor, eap_role_t role, identification_t*,identification_t*))create_instance;
this->public.destroy = (void(*)(eap_manager_t*))destroy;
this->methods = linked_list_create();
this->lock = rwlock_create(RWLOCK_TYPE_DEFAULT);
return &this->public;
}
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