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/*
* Copyright (C) 2011 Martin Willi
* Copyright (C) 2011 revosec AG
*
* 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 "xauth_manager.h"
#include <collections/linked_list.h>
#include <threading/rwlock.h>
typedef struct private_xauth_manager_t private_xauth_manager_t;
typedef struct xauth_entry_t xauth_entry_t;
/**
* XAuth constructor entry
*/
struct xauth_entry_t {
/**
* Xauth backend name
*/
char *name;
/**
* Role of the method, XAUTH_SERVER or XAUTH_PEER
*/
xauth_role_t role;
/**
* constructor function to create instance
*/
xauth_constructor_t constructor;
};
/**
* private data of xauth_manager
*/
struct private_xauth_manager_t {
/**
* public functions
*/
xauth_manager_t public;
/**
* list of eap_entry_t's
*/
linked_list_t *methods;
/**
* rwlock to lock methods
*/
rwlock_t *lock;
};
METHOD(xauth_manager_t, add_method, void,
private_xauth_manager_t *this, char *name, xauth_role_t role,
xauth_constructor_t constructor)
{
xauth_entry_t *entry;
INIT(entry,
.name = name,
.role = role,
.constructor = constructor,
);
this->lock->write_lock(this->lock);
this->methods->insert_last(this->methods, entry);
this->lock->unlock(this->lock);
}
METHOD(xauth_manager_t, remove_method, void,
private_xauth_manager_t *this, xauth_constructor_t constructor)
{
enumerator_t *enumerator;
xauth_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);
}
METHOD(xauth_manager_t, create_instance, xauth_method_t*,
private_xauth_manager_t *this, char *name, xauth_role_t role,
identification_t *server, identification_t *peer)
{
enumerator_t *enumerator;
xauth_entry_t *entry;
xauth_method_t *method = NULL;
this->lock->read_lock(this->lock);
enumerator = this->methods->create_enumerator(this->methods);
while (enumerator->enumerate(enumerator, &entry))
{
if (!name && streq(entry->name, "noauth"))
{ /* xauth-noauth has to be configured explicitly */
continue;
}
if (role == entry->role && (!name || streq(name, entry->name)))
{
method = entry->constructor(server, peer);
if (method)
{
break;
}
}
}
enumerator->destroy(enumerator);
this->lock->unlock(this->lock);
return method;
}
METHOD(xauth_manager_t, destroy, void,
private_xauth_manager_t *this)
{
this->methods->destroy_function(this->methods, free);
this->lock->destroy(this->lock);
free(this);
}
/*
* See header
*/
xauth_manager_t *xauth_manager_create()
{
private_xauth_manager_t *this;
INIT(this,
.public = {
.add_method = _add_method,
.remove_method = _remove_method,
.create_instance = _create_instance,
.destroy = _destroy,
},
.methods = linked_list_create(),
.lock = rwlock_create(RWLOCK_TYPE_DEFAULT),
);
return &this->public;
}
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