eap_server_methods.c

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/*
 * EAP server method registration
 * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "includes.h"

#include "common.h"
#include "eap_i.h"
#include "eap_methods.h"


static struct eap_method *eap_methods;


const struct eap_method * eap_server_get_eap_method(int vendor, EapType method)
{
        struct eap_method *m;
        for (m = eap_methods; m; m = m->next) {
                if (m->vendor == vendor && m->method == method)
                        return m;
        }
        return NULL;
}


EapType eap_server_get_type(const char *name, int *vendor)
{
        struct eap_method *m;
        for (m = eap_methods; m; m = m->next) {
                if (os_strcmp(m->name, name) == 0) {
                        *vendor = m->vendor;
                        return m->method;
                }
        }
        *vendor = EAP_VENDOR_IETF;
        return EAP_TYPE_NONE;
}


struct eap_method * eap_server_method_alloc(int version, int vendor,
                                            EapType method, const char *name)
{
        struct eap_method *eap;
        eap = os_zalloc(sizeof(*eap));
        if (eap == NULL)
                return NULL;
        eap->version = version;
        eap->vendor = vendor;
        eap->method = method;
        eap->name = name;
        return eap;
}


void eap_server_method_free(struct eap_method *method)
{
        os_free(method);
}


int eap_server_method_register(struct eap_method *method)
{
        struct eap_method *m, *last = NULL;

        if (method == NULL || method->name == NULL ||
            method->version != EAP_SERVER_METHOD_INTERFACE_VERSION)
                return -1;

        for (m = eap_methods; m; m = m->next) {
                if ((m->vendor == method->vendor &&
                     m->method == method->method) ||
                    os_strcmp(m->name, method->name) == 0)
                        return -2;
                last = m;
        }

        if (last)
                last->next = method;
        else
                eap_methods = method;

        return 0;
}


void eap_server_unregister_methods(void)
{
        struct eap_method *m;

        while (eap_methods) {
                m = eap_methods;
                eap_methods = eap_methods->next;

                if (m->free)
                        m->free(m);
                else
                        eap_server_method_free(m);
        }
}


const char * eap_server_get_name(int vendor, EapType type)
{
        struct eap_method *m;
        for (m = eap_methods; m; m = m->next) {
                if (m->vendor == vendor && m->method == type)
                        return m->name;
        }
        return NULL;
}