Scapy how get ping time?

networking, ping, python, scapy, time

Solution

Is there a way to get the exactly time elpased beetween sent packet and received packet by scapy?

You can use `pak.time` and `pak.sent_time`

I modified your script to use them...

import statistics
import os

from scapy.all import Ether, IP, ICMP, srp

if os.geteuid() > 0:
    raise OSError("This script must run as root")

ping_rtt_list = list()
def ping_addr(host, count=3):
    packet = Ether()/IP(dst=host)/ICMP()
    t=0.0
    for x in range(count):
        x += 1  # Start with x = 1 (not zero)
        ans, unans = srp(packet, iface="eth0", filter='icmp', verbose=0)
        rx = ans[0][1]
        tx = ans[0][0]
        delta = rx.time - tx.sent_time
        print("ping #{0} rtt: {1} second".format(x, round(delta, 6)))
        ping_rtt_list.append(round(delta, 6))
    return ping_rtt_list

if __name__=="__main__":
    ping_rtt_list = ping_addr('172.16.15.1')
    rtt_avg = round(statistics.mean(ping_rtt_list), 6)
    print("Avg ping rtt (seconds):", rtt_avg)

An example run:

$ sudo /opt/virtual_env/py37_test/bin/python ./ping_w_scapy.py
ping #1 rtt: 0.002019 second
ping #2 rtt: 0.002347 second
ping #3 rtt: 0.001807 second
Avg ping rtt (seconds): 0.002058

Problem

I'm trying to write a scapy script which can make an average on the ping time, so I need to get the time elapsed between ICMP echo/reply packet sent and reply packet received. For now, I have this: ``` #! /usr/bin/env python from scapy.all import * from time import * def QoS_ping(host, count=3): packet = Ether()/IP(dst=host)/ICMP() t=0.0 for x in range(count): t1=time() ans=srp(packet,iface="eth0", verbose=0) t2=time() t+=t2-t1 return (t/count)*1000 ``` The problem is that using time() function doesn't rise a good result. For example, I find 134 ms on one domain, and with the ping system function on the same domain, I have found 30 ms (average of course). My question is: Is there a way to get the exactly time elpased beetween sent packet and received packet by scapy? I don't want to use popen() function or other system call because I need scapy for futur packet management.

Original source