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1 /*
2  * netlink/route/cls/ematch.h		Extended Matches
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) 2008-2010 Thomas Graf <tgraf@suug.ch>
10  */
11 
12 #ifndef NETLINK_CLS_EMATCH_H_
13 #define NETLINK_CLS_EMATCH_H_
14 
15 #include <netlink/netlink.h>
16 #include <netlink/msg.h>
17 #include <netlink/route/classifier.h>
18 #include <linux/pkt_cls.h>
19 
20 #ifdef __cplusplus
21 extern "C" {
22 #endif
23 
24 /* FIXME: Should be moved to the kernel header at some point */
25 #define RTNL_EMATCH_PROGID	2
26 
27 struct rtnl_ematch;
28 struct rtnl_ematch_tree;
29 
30 /**
31  * Extended Match Operations
32  */
33 struct rtnl_ematch_ops
34 {
35 	int			eo_kind;
36 	const char *		eo_name;
37 	size_t			eo_minlen;
38 	size_t			eo_datalen;
39 
40 	int		      (*eo_parse)(struct rtnl_ematch *, void *, size_t);
41 	void		      (*eo_dump)(struct rtnl_ematch *,
42 					 struct nl_dump_params *);
43 	int		      (*eo_fill)(struct rtnl_ematch *, struct nl_msg *);
44 	void		      (*eo_free)(struct rtnl_ematch *);
45 	struct nl_list_head	eo_list;
46 };
47 
48 extern int			rtnl_ematch_register(struct rtnl_ematch_ops *);
49 extern struct rtnl_ematch_ops *	rtnl_ematch_lookup_ops(int);
50 extern struct rtnl_ematch_ops *	rtnl_ematch_lookup_ops_by_name(const char *);
51 
52 extern struct rtnl_ematch *	rtnl_ematch_alloc(void);
53 extern int			rtnl_ematch_add_child(struct rtnl_ematch *,
54 						      struct rtnl_ematch *);
55 extern void			rtnl_ematch_unlink(struct rtnl_ematch *);
56 extern void			rtnl_ematch_free(struct rtnl_ematch *);
57 
58 extern void *			rtnl_ematch_data(struct rtnl_ematch *);
59 extern void			rtnl_ematch_set_flags(struct rtnl_ematch *,
60 						      uint16_t);
61 extern void			rtnl_ematch_unset_flags(struct rtnl_ematch *,
62 							uint16_t);
63 extern uint16_t			rtnl_ematch_get_flags(struct rtnl_ematch *);
64 extern int			rtnl_ematch_set_ops(struct rtnl_ematch *,
65 						    struct rtnl_ematch_ops *);
66 extern int			rtnl_ematch_set_kind(struct rtnl_ematch *,
67 						     uint16_t);
68 extern int			rtnl_ematch_set_name(struct rtnl_ematch *,
69 						     const char *);
70 
71 extern struct rtnl_ematch_tree *rtnl_ematch_tree_alloc(uint16_t);
72 extern void			rtnl_ematch_tree_free(struct rtnl_ematch_tree *);
73 extern void			rtnl_ematch_tree_add(struct rtnl_ematch_tree *,
74 						     struct rtnl_ematch *);
75 
76 extern struct rtnl_ematch_tree *rtnl_ematch_tree_clone(struct rtnl_ematch_tree *);
77 
78 extern int			rtnl_ematch_parse_attr(struct nlattr *,
79 						       struct rtnl_ematch_tree **);
80 extern int			rtnl_ematch_fill_attr(struct nl_msg *, int,
81 						      struct rtnl_ematch_tree *);
82 extern void			rtnl_ematch_tree_dump(struct rtnl_ematch_tree *,
83 						      struct nl_dump_params *);
84 
85 
86 extern int			rtnl_ematch_parse_expr(const char *, char **,
87 						       struct rtnl_ematch_tree **);
88 
89 extern char *			rtnl_ematch_offset2txt(uint8_t, uint16_t,
90 						       char *, size_t);
91 extern char *			rtnl_ematch_opnd2txt(uint8_t, char *, size_t);
92 
93 #ifdef __cplusplus
94 }
95 #endif
96 
97 #endif
98