rawpacket

Documentation

Overview

Package rawpacket holds rawpacket related files

Package rawpacket holds raw_packet related files

Index

• func BPFFilterToInsts(_ int, _ string, _ ProgOpts) (asm.Instructions, error)
• func FiltersToProgramSpecs(_, _ int, _ []Filter, _ ProgOpts) ([]*ebpf.ProgramSpec, error)
• type Filter
• type ProgOpts
  • func DefaultProgOpts() ProgOpts

Functions

func BPFFilterToInsts

func BPFFilterToInsts(_ int, _ string, _ ProgOpts) (asm.Instructions, error)

BPFFilterToInsts compile a bpf filter expression

func FiltersToProgramSpecs

func FiltersToProgramSpecs(_, _ int, _ []Filter, _ ProgOpts) ([]*ebpf.ProgramSpec, error)

FiltersToProgramSpecs returns list of program spec from raw packet filters definitions

Types

type Filter

type Filter struct {
	RuleID    eval.RuleID
	BPFFilter string
}

Filter defines a raw packet filter

type ProgOpts

type ProgOpts struct {
	// MaxTailCalls maximun number of tail calls generated
	MaxTailCalls int
	// number of instructions
	MaxProgSize int
	// Number of nop instruction inserted in each program
	NopInstLen int
}

ProgOpts defines options

func DefaultProgOpts

func DefaultProgOpts() ProgOpts

DefaultProgOpts default options