1/*
2 * lib/route/cls_api.c       Classifier Module API
3 *
4 *	This library is free software; you can redistribute it and/or
5 *	modify it under the terms of the GNU Lesser General Public
6 *	License as published by the Free Software Foundation version 2.1
7 *	of the License.
8 *
9 * Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
10 */
11
12/**
13 * @ingroup cls
14 * @defgroup cls_api Classifier Modules
15 * @{
16 */
17
18#include <netlink-local.h>
19#include <netlink-tc.h>
20#include <netlink/netlink.h>
21#include <netlink/utils.h>
22#include <netlink/route/tc.h>
23#include <netlink/route/classifier.h>
24#include <netlink/route/classifier-modules.h>
25#include <netlink/route/link.h>
26
27static struct rtnl_cls_ops *cls_ops_list;
28
29/**
30 * @name Classifier Module API
31 * @{
32 */
33
34/**
35 * Register a classifier module
36 * @arg cops		classifier module operations
37 */
38int rtnl_cls_register(struct rtnl_cls_ops *cops)
39{
40	struct rtnl_cls_ops *o, **op;
41
42	if (!cops->co_kind)
43		BUG();
44
45	for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next)
46		if (!strcasecmp(cops->co_kind, o->co_kind))
47			return -NLE_EXIST;
48
49	cops->co_next = NULL;
50	*op = cops;
51
52	return 0;
53}
54
55/**
56 * Unregister a classifier module
57 * @arg cops		classifier module operations
58 */
59int rtnl_cls_unregister(struct rtnl_cls_ops *cops)
60{
61	struct rtnl_cls_ops *o, **op;
62
63	for (op = &cls_ops_list; (o = *op) != NULL; op = &o->co_next)
64		if (!strcasecmp(cops->co_kind, o->co_kind))
65			break;
66
67	if (!o)
68		return -NLE_OBJ_NOTFOUND;
69
70	*op = cops->co_next;
71
72	return 0;
73}
74
75struct rtnl_cls_ops *__rtnl_cls_lookup_ops(const char *kind)
76{
77	struct rtnl_cls_ops *cops;
78
79	for (cops = cls_ops_list; cops; cops = cops->co_next)
80		if (!strcmp(kind, cops->co_kind))
81			return cops;
82
83	return NULL;
84}
85
86/**
87 * Lookup classifier operations for a classifier object
88 * @arg cls		Classifier object.
89 *
90 * @return Classifier operations or NULL if not found.
91 */
92struct rtnl_cls_ops *rtnl_cls_lookup_ops(struct rtnl_cls *cls)
93{
94	if (!cls->c_ops)
95		cls->c_ops = __rtnl_cls_lookup_ops(cls->c_kind);
96
97	return cls->c_ops;
98}
99
100
101/** @} */
102
103/** @} */
104