1 #ifndef __NET_PKT_CLS_H
2 #define __NET_PKT_CLS_H
3
4
5 #include <linux/pkt_cls.h>
6
7 struct rtattr;
8 struct tcmsg;
9
10 /* Basic packet classifier frontend definitions. */
11
12 struct tcf_result
13 {
14 unsigned long class;
15 u32 classid;
16 };
17
18 struct tcf_proto
19 {
20 /* Fast access part */
21 struct tcf_proto *next;
22 void *root;
23 int (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *);
24 u32 protocol;
25
26 /* All the rest */
27 u32 prio;
28 u32 classid;
29 struct Qdisc *q;
30 void *data;
31 struct tcf_proto_ops *ops;
32 };
33
34 struct tcf_walker
35 {
36 int stop;
37 int skip;
38 int count;
39 int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
40 };
41
42 struct tcf_proto_ops
43 {
44 struct tcf_proto_ops *next;
45 char kind[IFNAMSIZ];
46
47 int (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *);
48 int (*init)(struct tcf_proto*);
49 void (*destroy)(struct tcf_proto*);
50
51 unsigned long (*get)(struct tcf_proto*, u32 handle);
52 void (*put)(struct tcf_proto*, unsigned long);
53 int (*change)(struct tcf_proto*, unsigned long, u32 handle, struct rtattr **, unsigned long *);
54 int (*delete)(struct tcf_proto*, unsigned long);
55 void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
56
57 /* rtnetlink specific */
58 int (*dump)(struct tcf_proto*, unsigned long, struct sk_buff *skb, struct tcmsg*);
59 };
60
61 /* Main classifier routine: scans classifier chain attached
62 to this qdisc, (optionally) tests for protocol and asks
63 specific classifiers.
64 */
65
66 static inline int tc_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
67 {
68 int err = 0;
69 u32 protocol = skb->protocol;
70
71 for ( ; tp; tp = tp->next) {
72 if ((tp->protocol == protocol ||
73 tp->protocol == __constant_htons(ETH_P_ALL)) &&
74 (err = tp->classify(skb, tp, res)) >= 0)
75 return err;
76 }
77 return -1;
78 }
79
80
81
82 extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
83 extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
84
85
86
87 #endif
88
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