cls_api.c

/*
 * lib/route/cls_api.c       Classifier Module API
 *
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation version 2.1
 *      of the License.
 *
 * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch>
 */
 
/**
 * @ingroup cls
 * @defgroup cls_api Classifier Modules
 * @{
 */
 
#include <netlink-local.h>
#include <netlink-tc.h>
#include <netlink/netlink.h>
#include <netlink/utils.h>
#include <netlink/route/tc.h>
#include <netlink/route/classifier.h>
#include <netlink/route/classifier-modules.h>
#include <netlink/route/link.h>
 
static struct rtnl_cls_ops *cls_ops_list;
 
/**
 * @name Classifier Module API
 * @{
 */
 
/**
 * Register a classifier module
 * @arg cops            classifier module operations
 */
int rtnl_cls_register(struct rtnl_cls_ops *cops)
{
        struct rtnl_cls_ops *o, **op;
 
        if (!cops->co_kind)
                BUG();
 
        for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next)
                if (!strcasecmp(cops->co_kind, o->co_kind))
                        return nl_errno(EEXIST);
 
        cops->co_next = NULL;
        *op = cops;
 
        return 0;
}
 
/**
 * Unregister a classifier module
 * @arg cops            classifier module operations
 */
int rtnl_cls_unregister(struct rtnl_cls_ops *cops)
{
        struct rtnl_cls_ops *o, **op;
 
        for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next)
                if (!strcasecmp(cops->co_kind, o->co_kind))
                        break;
 
        if (!o)
                return nl_errno(ENOENT);
 
        *op = cops->co_next;
 
        return 0;
}
 
struct rtnl_cls_ops *__rtnl_cls_lookup_ops(const char *kind)
{
        struct rtnl_cls_ops *cops;
 
        for (cops = cls_ops_list; cops; cops = cops->co_next)
                if (!strcmp(kind, cops->co_kind))
                        return cops;
 
        return NULL;
}
 
/**
 * Lookup classifier operations for a classifier object
 * @arg cls             Classifier object.
 *
 * @return Classifier operations or NULL if not found.
 */
struct rtnl_cls_ops *rtnl_cls_lookup_ops(struct rtnl_cls *cls)
{
        if (!cls->c_ops)
                cls->c_ops = __rtnl_cls_lookup_ops(cls->c_kind);
 
        return cls->c_ops;
}
 
 
/** @} */
 
/** @} */