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      1 // Copyright 2015 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_FILTER_H_
      6 #define SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_FILTER_H_
      7 
      8 #include <stdint.h>
      9 
     10 // The following structs and macros are taken from linux/filter.h,
     11 // as some toolchain does not expose them.
     12 struct sock_filter {
     13   uint16_t code;
     14   uint8_t jt;
     15   uint8_t jf;
     16   uint32_t k;
     17 };
     18 
     19 struct sock_fprog {
     20   uint16_t len;
     21   struct sock_filter *filter;
     22 };
     23 
     24 #ifndef BPF_CLASS
     25 #define BPF_CLASS(code) ((code) & 0x07)
     26 #endif
     27 
     28 #ifndef BPF_LD
     29 #define BPF_LD 0x00
     30 #endif
     31 
     32 #ifndef BPF_ALU
     33 #define BPF_ALU 0x04
     34 #endif
     35 
     36 #ifndef BPF_JMP
     37 #define BPF_JMP 0x05
     38 #endif
     39 
     40 #ifndef BPF_RET
     41 #define BPF_RET 0x06
     42 #endif
     43 
     44 #ifndef BPF_SIZE
     45 #define BPF_SIZE(code) ((code) & 0x18)
     46 #endif
     47 
     48 #ifndef BPF_W
     49 #define BPF_W 0x00
     50 #endif
     51 
     52 #ifndef BPF_MODE
     53 #define BPF_MODE(code) ((code) & 0xe0)
     54 #endif
     55 
     56 #ifndef BPF_ABS
     57 #define BPF_ABS 0x20
     58 #endif
     59 
     60 #ifndef BPF_OP
     61 #define BPF_OP(code) ((code) & 0xf0)
     62 #endif
     63 
     64 #ifndef BPF_ADD
     65 #define BPF_ADD 0x00
     66 #endif
     67 
     68 #ifndef BPF_SUB
     69 #define BPF_SUB 0x10
     70 #endif
     71 
     72 #ifndef BPF_MUL
     73 #define BPF_MUL 0x20
     74 #endif
     75 
     76 #ifndef BPF_DIV
     77 #define BPF_DIV 0x30
     78 #endif
     79 
     80 #ifndef BPF_OR
     81 #define BPF_OR 0x40
     82 #endif
     83 
     84 #ifndef BPF_AND
     85 #define BPF_AND 0x50
     86 #endif
     87 
     88 #ifndef BPF_LSH
     89 #define BPF_LSH 0x60
     90 #endif
     91 
     92 #ifndef BPF_RSH
     93 #define BPF_RSH 0x70
     94 #endif
     95 
     96 #ifndef BPF_NEG
     97 #define BPF_NEG 0x80
     98 #endif
     99 
    100 #ifndef BPF_MOD
    101 #define BPF_MOD 0x90
    102 #endif
    103 
    104 #ifndef BPF_XOR
    105 #define BPF_XOR 0xA0
    106 #endif
    107 
    108 #ifndef BPF_JA
    109 #define BPF_JA 0x00
    110 #endif
    111 
    112 #ifndef BPF_JEQ
    113 #define BPF_JEQ 0x10
    114 #endif
    115 
    116 #ifndef BPF_JGT
    117 #define BPF_JGT 0x20
    118 #endif
    119 
    120 #ifndef BPF_JGE
    121 #define BPF_JGE 0x30
    122 #endif
    123 
    124 #ifndef BPF_JSET
    125 #define BPF_JSET 0x40
    126 #endif
    127 
    128 #ifndef BPF_SRC
    129 #define BPF_SRC(code) ((code) & 0x08)
    130 #endif
    131 
    132 #ifndef BPF_K
    133 #define BPF_K 0x00
    134 #endif
    135 
    136 #ifndef BPF_MAXINSNS
    137 #define BPF_MAXINSNS 4096
    138 #endif
    139 
    140 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_FILTER_H_
    141