How I can make ICMP Pinger code work using python?

I have a problem with running a python code in pox controller...

I have a code that use ping3 to ping between a pox controller and two servers. However, every time the ping returns (None) as a result and I can't figure out why. I have tried to go through the code of the icmp pinger and I find out that this line:

whatReady = select.select([mySocket], [], [], timeLeft)

always return this result: [],[],[]

and because of this ping always return (None) instead of numerical number.

The icmp pinger code:

from socket import *
import socket
import os
import sys
import struct
import time
import select
import binascii

ICMP_ECHO_REQUEST = 8

def checksum(str):
    csum = 0
    countTo = (len(str) / 2) * 2

    count = 0
    while count < countTo:
        thisVal = ord(str[count+1]) * 256 + ord(str[count])
        csum = csum + thisVal
        csum = csum & 0xffffffffL
        count = count + 2

    if countTo < len(str):
        csum = csum + ord(str[len(str) - 1])
        csum = csum & 0xffffffffL

    csum = (csum >> 16) + (csum & 0xffff)
    csum = csum + (csum >> 16)
    answer = ~csum
    answer = answer & 0xffff
    answer = answer >> 8 | (answer << 8 & 0xff00)
    return answer

def receiveOnePing(mySocket, ID, timeout, destAddr):
    timeLeft = timeout
    while 1:
            startedSelect = time.time()
            whatReady = select.select([mySocket], [], [], timeLeft)
            howLongInSelect = (time.time() - startedSelect)

            if whatReady[0] == []: #Timeout
                return "Request timed out."

            timeReceived = time.time()
            recPacket, addr = mySocket.recvfrom(1024)

            #Fill in start

            #Fetch the ICMP header from the IP packet

            ICMPHeader = recPacket[20:28]
            Type, Code, Checksum, packetID, Sequence = struct.unpack('bbHHh', ICMPHeader)
            if packetID == ID:
                BytesInDouble = struct.calcsize('d')
                timeSent = struct.unpack('d',recPacket[28:28 + BytesInDouble])[0]
                return timeReceived - timeSent
            else:
                return 'Different ID'
            #Fill in end
            timeLeft = timeLeft - howLongInSelect
            if timeLeft <= 0:
                return "Request timed out"

def sendOnePing(mySocket, destAddr, ID):
    # Header is type (8), code (8), checksum (16), id (16), sequence (16)

    myChecksum = 0
    # Make a dummy header with a 0 checksum
    # struct -- Interpret strings as packed binary data
    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, myChecksum, ID, 1)
    data = struct.pack("d", time.time())
    # Calculate the checksum on the data and the dummy header.
    myChecksum = checksum(header + data)

    # Get the right checksum, and put in the header
    if sys.platform == 'darwin':
        myChecksum = socket.htons(myChecksum) & 0xffff
        #Convert 16-bit integers from host to network byte order.
    else:
        myChecksum = socket.htons(myChecksum)

    header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, myChecksum, ID, 1)
    packet = header + data

    mySocket.sendto(packet, (destAddr, 1)) # AF_INET address must be tuple, not str
    #Both LISTS and TUPLES consist of a number of objects
    #which can be referenced by their position within the object

def doOnePing(destAddr, timeout):
    icmp = socket.getprotobyname("icmp")
    #SOCK_RAW is a powerful socket type. For more details see: http://sock-raw.ord/papers/sock_raw

    #Fill in start

    #Create Socket here

    try:
        mySocket = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)
    except socket.error, (errno, msg):
        if errno == 1:
            raise socket.error(msg)
    
    #Fill in end
    
    myID = os.getpid() & 0xFFFF #Return the current process i
    sendOnePing(mySocket, destAddr, myID)
    delay = receiveOnePing(mySocket, myID, timeout, destAddr)

    mySocket.close()
    return delay

ping("www.google.com") # USA - North America
# ping('www.china.org.cn') # China - Asia
# ping('www.thepiratebay.se') # Sweden - Europe

Can anyone help to understand what is the actual problem and how I can fix it...

source https://stackoverflow.com/questions/72418586/how-i-can-make-icmp-pinger-code-work-using-python