probelabs/goreplay · error

Not implemented

Error message

Not implemented

What it means

Non-Linux stub in internal/capture: newAfpacketHandle and afpacketComputeSize have no implementation off Linux and always return this placeholder error, so requesting afpacket capture there fails at handle creation.

Solutions

1. Run capture on Linux where AF_PACKET is implemented
2. Fall back to the pcap capture engine on macOS/BSD
3. Don't construct afpacket handles on unsupported GOOS

When it happens

Trigger: Thrown at internal/capture/af_packet.go:14 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of probelabs/goreplay@251e45abd2 (2026-09-02). Data as JSON: /api/errors/800684fd60823e3f. Report an issue: GitHub.

Appendix: source

Thrown at internal/capture/af_packet.go:14

//go:build !linux

package capture

import (
	"fmt"
	"time"

	"github.com/google/gopacket"
)

func newAfpacketHandle(device string, snaplen int, block_size int, num_blocks int,
	useVLAN bool, timeout time.Duration) (*afpacketHandle, error) {
	return nil, fmt.Errorf("Not implemented")
}

func afpacketComputeSize(targetSizeMb int, snaplen int, pageSize int) (
	frameSize int, blockSize int, numBlocks int, err error) {
	return 0, 0, 0, fmt.Errorf("Not implemented")
}

type afpacketHandle struct{}

// ReadPacketData satisfies PacketDataSource interface
func (h *afpacketHandle) ReadPacketData() (data []byte, ci gopacket.CaptureInfo, err error) {
	return nil, gopacket.CaptureInfo{}, fmt.Errorf("Not implemented")
}

// SetBPFFilter translates a BPF filter string into BPF RawInstruction and applies them.
func (h *afpacketHandle) SetBPFFilter(filter string, snaplen int) (err error) {
	return fmt.Errorf("Not implemented")
}

View on GitHub (pinned to 251e45abd2)