RasPi不会在ARP探测器上触发

Question

I'm trying to learn about programming and working in command line and all that and I'm still really new at it. I got an Amazon Dash button to mess around with and I was able to get it to trigger a message in a Slack room when you press it. Then I tried recreated the program on my raspi2, it worked ONCE and now when I run the program it just seems to not recognize the MAC address, ie nothing happens at all.

Here is the program that is running

import requests
import json

SLACK_INCOMING_WEB_HOOK = "https://hooks.slack.com/services/....." #Figure I should remove this for my question...
SLACK_INCOMING_USER = "SlackBit Bot" #Slack Bot display name
SLACK_INCOMING_CHANNEL = "#test" #Slack Channel

from scapy.all import *
def arp_display(pkt):
  if pkt[ARP].op == 1: #who-has (request)
    if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
      if pkt[ARP].hwsrc == 'a0:02:dc:42:32:e3': # Huggies
        print "Pushed Doritos"
        payload = {
            "text": "You Pressed The Button!",
            "username": SLACK_INCOMING_USER,
            "channel": SLACK_INCOMING_CHANNEL
        }
        r = requests.post(SLACK_INCOMING_WEB_HOOK, json.dumps(payload), headers={'content-type': 'application/json'})
        print r.status_code
        print r.content
      else:
        print "ARP Probe from unknown device: " + pkt[ARP].hwsrc

print sniff(prn=arp_display, filter="arp", store=0, count=0)

It worked the very first time I ran the program and pressed the button, but now it just runs and does nothing indefinitely.

Any help would be appreciated. Sorry if my terminology is all wrong.

Thanks!

Answer 1

尝试评论该行：

if pkt[ARP].psrc == '0.0.0.0': # ARP Probe

Answer 2

I have two brand new dash buttons, instead of doing an arp for 0.0.0.0, they are doing a bootp request to get a dhcp address, this causes the common scripts that are looking for an arp 0.0.0.0 to ignore them.

you can modify the scripts to watch for bootp, instead of watching for arp 0.0.0.0, or just, as cyrus says, comment out the line testing for an arp probe.

Answer 3

For those still struggling with this change (Detecting the Dash button with bootp vs. arp), here's what I'm using with a brand new Dash button:

from scapy.all import *
import requests
import time
def arp_display(pkt):
  if pkt.haslayer(DHCP):
   if pkt[Ether].src == 'x:x:x:x:x:x': # Dash Button MAC
    print "Pushed Dash Button" 
   else: 
    print "BOOTP Request from other device: " + pkt[Ether].src
print sniff(prn=arp_display, filter="(udp and (port 67 or 68))", store=0)