python 3-基于ip的mac地址-scapy

Question

i am working on a way to obtain the mac address of a machine based on its ip, therefore i use python in combination with scapy:

def obtain_mac(IP):
        conf.verb = 0
        ans, unans = srp(Ether(dst = "ff:ff:ff:ff:ff:ff")/ARP(pdst = IP), timeout = 2, iface = interface, retry = 10)
        for snd,rcv in ans:
            return rcv.sprintf(r"%Ether.src%")
            # i also tried this, but same result
            #return rcv[Ether].src

When i run this method:

try:
        otherMac = obtain_mac(192.168.2.134)
except Exception:
        # some stuff
        print ("[!] Couldn't Find MAC Address")
        sys.exit(1)

it always returns:

Couldn't Find MAC Address

I am running this code from my linux. Using ping i already made sure, that i can access the other machine in network.

is there anything i missed from docs?

thanks and greetings

Answer 1

First, try

except Exception as e:
    print e

or better

logger.exception(e)

to see the error details, next try run as root.