Commit | Line | Data |
---|---|---|
607ca46e DH |
1 | /* |
2 | * Linux Socket Filter Data Structures | |
3 | */ | |
4 | ||
5 | #ifndef _UAPI__LINUX_FILTER_H__ | |
6 | #define _UAPI__LINUX_FILTER_H__ | |
7 | ||
8 | #include <linux/compiler.h> | |
9 | #include <linux/types.h> | |
c15952dc | 10 | #include <linux/bpf_common.h> |
607ca46e DH |
11 | |
12 | /* | |
13 | * Current version of the filter code architecture. | |
14 | */ | |
15 | #define BPF_MAJOR_VERSION 1 | |
16 | #define BPF_MINOR_VERSION 1 | |
17 | ||
18 | /* | |
19 | * Try and keep these values and structures similar to BSD, especially | |
20 | * the BPF code definitions which need to match so you can share filters | |
21 | */ | |
22 | ||
23 | struct sock_filter { /* Filter block */ | |
24 | __u16 code; /* Actual filter code */ | |
25 | __u8 jt; /* Jump true */ | |
26 | __u8 jf; /* Jump false */ | |
27 | __u32 k; /* Generic multiuse field */ | |
28 | }; | |
29 | ||
30 | struct sock_fprog { /* Required for SO_ATTACH_FILTER. */ | |
31 | unsigned short len; /* Number of filter blocks */ | |
32 | struct sock_filter __user *filter; | |
33 | }; | |
34 | ||
607ca46e DH |
35 | /* ret - BPF_K and BPF_X also apply */ |
36 | #define BPF_RVAL(code) ((code) & 0x18) | |
37 | #define BPF_A 0x10 | |
38 | ||
39 | /* misc */ | |
40 | #define BPF_MISCOP(code) ((code) & 0xf8) | |
41 | #define BPF_TAX 0x00 | |
42 | #define BPF_TXA 0x80 | |
43 | ||
607ca46e DH |
44 | /* |
45 | * Macros for filter block array initializers. | |
46 | */ | |
47 | #ifndef BPF_STMT | |
48 | #define BPF_STMT(code, k) { (unsigned short)(code), 0, 0, k } | |
49 | #endif | |
50 | #ifndef BPF_JUMP | |
51 | #define BPF_JUMP(code, k, jt, jf) { (unsigned short)(code), jt, jf, k } | |
52 | #endif | |
53 | ||
54 | /* | |
55 | * Number of scratch memory words for: BPF_ST and BPF_STX | |
56 | */ | |
57 | #define BPF_MEMWORDS 16 | |
58 | ||
59 | /* RATIONALE. Negative offsets are invalid in BPF. | |
60 | We use them to reference ancillary data. | |
61 | Unlike introduction new instructions, it does not break | |
62 | existing compilers/optimizers. | |
63 | */ | |
64 | #define SKF_AD_OFF (-0x1000) | |
65 | #define SKF_AD_PROTOCOL 0 | |
66 | #define SKF_AD_PKTTYPE 4 | |
67 | #define SKF_AD_IFINDEX 8 | |
68 | #define SKF_AD_NLATTR 12 | |
69 | #define SKF_AD_NLATTR_NEST 16 | |
70 | #define SKF_AD_MARK 20 | |
71 | #define SKF_AD_QUEUE 24 | |
72 | #define SKF_AD_HATYPE 28 | |
73 | #define SKF_AD_RXHASH 32 | |
74 | #define SKF_AD_CPU 36 | |
75 | #define SKF_AD_ALU_XOR_X 40 | |
f3335031 ED |
76 | #define SKF_AD_VLAN_TAG 44 |
77 | #define SKF_AD_VLAN_TAG_PRESENT 48 | |
3e5289d5 | 78 | #define SKF_AD_PAY_OFFSET 52 |
4cd3675e | 79 | #define SKF_AD_RANDOM 56 |
27cd5452 MS |
80 | #define SKF_AD_VLAN_TPID 60 |
81 | #define SKF_AD_MAX 64 | |
607ca46e | 82 | |
a166151c AS |
83 | #define SKF_NET_OFF (-0x100000) |
84 | #define SKF_LL_OFF (-0x200000) | |
85 | ||
86 | #define BPF_NET_OFF SKF_NET_OFF | |
87 | #define BPF_LL_OFF SKF_LL_OFF | |
607ca46e DH |
88 | |
89 | #endif /* _UAPI__LINUX_FILTER_H__ */ |