1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#ifndef __NET_PKT_CLS_H
#define __NET_PKT_CLS_H
#include <linux/pkt_cls.h>
struct rtattr;
struct tcmsg;
/* Basic packet classifier frontend definitions. */
struct tcf_result
{
unsigned long class;
u32 classid;
};
struct tcf_proto
{
/* Fast access part */
struct tcf_proto *next;
void *root;
int (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *);
u32 protocol;
/* All the rest */
u32 prio;
u32 classid;
struct Qdisc *q;
void *data;
struct tcf_proto_ops *ops;
};
struct tcf_walker
{
int stop;
int skip;
int count;
int (*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
};
struct tcf_proto_ops
{
struct tcf_proto_ops *next;
char kind[IFNAMSIZ];
int (*classify)(struct sk_buff*, struct tcf_proto*, struct tcf_result *);
int (*init)(struct tcf_proto*);
void (*destroy)(struct tcf_proto*);
unsigned long (*get)(struct tcf_proto*, u32 handle);
void (*put)(struct tcf_proto*, unsigned long);
int (*change)(struct tcf_proto*, unsigned long, u32 handle, struct rtattr **, unsigned long *);
int (*delete)(struct tcf_proto*, unsigned long);
void (*walk)(struct tcf_proto*, struct tcf_walker *arg);
/* rtnetlink specific */
int (*dump)(struct tcf_proto*, unsigned long, struct sk_buff *skb, struct tcmsg*);
};
/* Main classifier routine: scans classifier chain attached
to this qdisc, (optionally) tests for protocol and asks
specific classifiers.
*/
extern __inline__ int tc_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
{
int err = 0;
u32 protocol = skb->protocol;
for ( ; tp; tp = tp->next) {
if ((tp->protocol == protocol ||
tp->protocol == __constant_htons(ETH_P_ALL)) &&
(err = tp->classify(skb, tp, res)) >= 0)
return err;
}
return -1;
}
extern __inline__ unsigned long cls_set_class(unsigned long *clp, unsigned long cl)
{
unsigned long old_cl;
old_cl = *clp;
*clp = cl;
synchronize_bh();
return old_cl;
}
extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
extern int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
#endif
|
