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> 10#include <linux/bpf_common.h> 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 23struct 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 30struct sock_fprog { /* Required for SO_ATTACH_FILTER. */ 31 unsigned short len; /* Number of filter blocks */ 32 struct sock_filter __user *filter; 33}; 34 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 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 76#define SKF_AD_VLAN_TAG 44 77#define SKF_AD_VLAN_TAG_PRESENT 48 78#define SKF_AD_PAY_OFFSET 52 79#define SKF_AD_RANDOM 56 80#define SKF_AD_VLAN_TPID 60 81#define SKF_AD_MAX 64 82 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 88 89#endif /* _UAPI__LINUX_FILTER_H__ */ 90