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Merge "more classic bpf macros" into main

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This commit is contained in:
Maciej Żenczykowski
2023-10-05 18:10:26 +00:00
committed by Gerrit Code Review
parent 6a5ab05e87 d5bf2061f3
commit 0d55be75fd
1 changed files with 23 additions and 1 deletions
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24
staticlibs/native/bpf_headers/include/bpf/BpfClassic.h
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@@ -22,9 +22,15 @@
// Reject the packet
#define BPF_REJECT BPF_STMT(BPF_RET | BPF_K, 0)
// Note arguments to BPF_JUMP(opcode, operand, true_offset, false_offset)
// If not equal, jump over count instructions
#define BPF_JUMP_IF_NOT_EQUAL(v, count) \
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, (v), 0, (count))
// *TWO* instructions: compare and if not equal jump over the accept statement
#define BPF2_ACCEPT_IF_EQUAL(v) \
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, (v), 0, 1), \
BPF_JUMP_IF_NOT_EQUAL((v), 1), \
BPF_ACCEPT
// *TWO* instructions: compare and if equal jump over the reject statement
@@ -32,6 +38,22 @@
BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, (v), 1, 0), \
BPF_REJECT
// *TWO* instructions: compare and if greater or equal jump over the reject statement
#define BPF2_REJECT_IF_LESS_THAN(v) \
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, (v), 1, 0), \
BPF_REJECT
// *TWO* instructions: compare and if *NOT* greater jump over the reject statement
#define BPF2_REJECT_IF_GREATER_THAN(v) \
BPF_JUMP(BPF_JMP | BPF_JGT | BPF_K, (v), 0, 1), \
BPF_REJECT
// *THREE* instructions: compare and if *NOT* in range [lo, hi], jump over the reject statement
#define BPF3_REJECT_IF_NOT_IN_RANGE(lo, hi) \
BPF_JUMP(BPF_JMP | BPF_JGE | BPF_K, (lo), 0, 1), \
BPF_JUMP(BPF_JMP | BPF_JGT | BPF_K, (hi), 0, 1), \
BPF_REJECT
// *TWO* instructions: compare and if none of the bits are set jump over the reject statement
#define BPF2_REJECT_IF_ANY_MASKED_BITS_SET(v) \
BPF_JUMP(BPF_JMP | BPF_JSET | BPF_K, (v), 0, 1), \