David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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> |
Alexei Starovoitov | c15952d | 2014-10-14 02:08:54 -0700 | [diff] [blame] | 10 | #include <linux/bpf_common.h> |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 | |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 | |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 |
Eric Dumazet | f333503 | 2012-10-27 02:26:17 +0000 | [diff] [blame] | 76 | #define SKF_AD_VLAN_TAG 44 |
| 77 | #define SKF_AD_VLAN_TAG_PRESENT 48 |
Daniel Borkmann | 3e5289d | 2013-03-19 06:39:31 +0000 | [diff] [blame] | 78 | #define SKF_AD_PAY_OFFSET 52 |
Chema Gonzalez | 4cd3675 | 2014-04-21 09:21:24 -0700 | [diff] [blame] | 79 | #define SKF_AD_RANDOM 56 |
Michal Sekletar | 27cd545 | 2015-03-24 14:48:41 +0100 | [diff] [blame] | 80 | #define SKF_AD_VLAN_TPID 60 |
| 81 | #define SKF_AD_MAX 64 |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 82 | |
Alexei Starovoitov | a166151 | 2015-04-15 12:55:45 -0700 | [diff] [blame] | 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 |
David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 88 | |
| 89 | #endif /* _UAPI__LINUX_FILTER_H__ */ |