Scapy ARP function not giving proper output when running it

问题

I have a simple script:

import scapy.all as scapy

def scan(ip):
    arg = scapy.ARP(pdst=ip)
    print(arg.summary())
scan("192.168.11.0/24")

But when I run this script the output I get is:

ARP who has ?? says ??

Normally the summary would give me 2 IP address's where the 2 question marks are but for some reason that is not the case. Also I have made a network scanner and It was working fine yesterday and returned to me all ip and mac address on the network but today I can't seem to pass in a range(ex:"192.168.11.0/24")when I do the only output I get is:

IP          MAC Address
----------------------------------------------------
192.168.11.1        08:02:8e:a1:6a:d0

Even though there are more devices in the network. Is there something wrong with scapy? If so how should I delete and reinstall it because I have already done pip uninstall scapy and pip install scapy and nothing works still.

回答1:

You're not actually doing anything with your script. Your function includes arg = scapy.ARP(pdst=ip), which creates an ARP packet. To send it, use sr or sr1. There are also ARP example one-liners that cover ARP pings. Applied here,

from scapy.all import *

def arp_scan(ips):
    resp = arping(ips)
    print(resp)
arp_scan("192.168.11.0/24")

We will get output that looks similar to

Begin emission:
*Finished sending 256 packets.

Received 1 packets, got 1 answers, remaining 255 packets
  9c:5c:12:ca:7b:6f 192.168.11.1

来源：https://stackoverflow.com/questions/58259896/scapy-arp-function-not-giving-proper-output-when-running-it