// Create a new virtual network circuit
circuit := rawnet.NewCircuit()
// Bridge a device to the circuit
circuit.BridgeDevice(myNetworkDevice)
// Enable debug logging
circuit.SetDebug(true)

// Handle an L2 packet
func (d *MyDevice) HandleL2Packet(src rawnet.L2Device, pkt rawnet.L2Packet) error {
    // Get source and destination MAC addresses
    srcMac := pkt.GetSourceMac()
    dstMac := pkt.GetDestinationMac()
    
    // Get ethertype and VLAN info
    ethertype, vlan, l3p := pkt.GetL3Packet()
    
    // Process based on packet type
    // ...
}

// Access IP addresses
srcIP := l3p.GetSourceIP()
dstIP := l3p.GetDestinationIP()
// Create a new L3 packet with modified source
newPacket := l3p.WithNewSource(myIP, myPort)
// Create a new L3 packet with modified destination
newPacket := l3p.WithNewDst(targetIP, targetPort)