func()

in pcap-cli/pkg/pcap/gopacket_engine.go [40:79]

• 31 lines of code
• 8 McCabe index (conditional complexity)

func (p *Pcap) newPcap(ctx context.Context) (*pcap.InactiveHandle, error) {
	cfg := *p.config

	var err error

	inactiveHandle, err := pcap.NewInactiveHandle(cfg.Iface)
	if err != nil {
		gopacketLogger.Printf("could not create: %v\n", err)
	}

	if err = inactiveHandle.SetSnapLen(cfg.Snaplen); err != nil {
		gopacketLogger.Printf("could not set snap length: %v\n", err)
		return nil, err
	}

	if err = inactiveHandle.SetPromisc(cfg.Promisc); err != nil {
		gopacketLogger.Printf("could not set promisc mode: %v\n", err)
		return nil, err
	}

	// [TODO]: make handle timeout dynamic
	if err = inactiveHandle.SetTimeout(100 * time.Millisecond); err != nil {
		gopacketLogger.Printf("could not set timeout: %v\n", err)
		return nil, err
	}

	if cfg.TsType != "" {
		if t, err := pcap.TimestampSourceFromString(cfg.TsType); err != nil {
			gopacketLogger.Printf("Supported timestamp types: %v\n", inactiveHandle.SupportedTimestamps())
			return nil, err
		} else if err := inactiveHandle.SetTimestampSource(t); err != nil {
			gopacketLogger.Printf("Supported timestamp types: %v\n", inactiveHandle.SupportedTimestamps())
			return nil, err
		}
	}

	p.inactiveHandle = inactiveHandle

	return inactiveHandle, nil
}