udping

#!/usr/bin/env python3

from __future__ import print_function 

import socket
import sys
import time
import string
import random
import signal
import sys
import os

INTERVAL = 1000  #unit ms
LEN =64
IP=""
PORT=0

count=0
count_of_received=0
rtt_sum=0.0
rtt_min=99999999.0
rtt_max=0.0

def signal_handler(signal, frame):
	if count!=0 and count_of_received!=0:
		print('')
		print('--- ping statistics ---')
	if count!=0:
		print('%d packets transmitted, %d received, %.2f%% packet loss'%(count,count_of_received, (count-count_of_received)*100.0/count))
	if count_of_received!=0:
		print('rtt min/avg/max = %.2f/%.2f/%.2f ms'%(rtt_min,rtt_sum/count_of_received,rtt_max))
	os._exit(0)

def random_string(length):
        return ''.join(random.choice(string.ascii_letters+ string.digits ) for m in range(length))

if len(sys.argv) != 3 and len(sys.argv)!=4 :
	print(""" usage:""")
	print("""   this_program <dest_ip> <dest_port>""")
	print("""   this_program <dest_ip> <dest_port> "<options>" """)

	print()
	print(""" options:""")
	print("""   LEN         the length of payload, unit:byte""")
	print("""   INTERVAL    the seconds waited between sending each packet, as well as the timeout for reply packet, unit: ms""")

	print()
	print(" examples:")
	print("   ./udpping.py 44.55.66.77 4000")
	print('   ./udpping.py 44.55.66.77 4000 "LEN=400;INTERVAL=2000"')
	print("   ./udpping.py fe80::5400:ff:aabb:ccdd 4000")
	print()

	exit()

IP=sys.argv[1]
PORT=int(sys.argv[2])

is_ipv6=0;

if IP.find(":")!=-1:
	is_ipv6=1;

if len(sys.argv)==4:
	exec(sys.argv[3])
	
if LEN<5:
	print("LEN must be >=5")
	exit()
if INTERVAL<50:
	print("INTERVAL must be >=50")
	exit()

signal.signal(signal.SIGINT, signal_handler)

if not is_ipv6:
	sock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
else:
	sock = socket.socket(socket.AF_INET6,socket.SOCK_DGRAM)

print("UDPping %s via port %d with %d bytes of payload"% (IP,PORT,LEN))
sys.stdout.flush()

while True:
	payload= random_string(LEN)
	sock.sendto(payload.encode(), (IP, PORT))
	time_of_send=time.time()
	deadline = time.time() + INTERVAL/1000.0
	received=0
	rtt=0.0
	
	while True:
		timeout=deadline - time.time()
		if timeout <0:
			break
		#print "timeout=",timeout
		sock.settimeout(timeout);
		try:
			recv_data,addr = sock.recvfrom(65536)
			if recv_data== payload.encode()  and addr[0]==IP and addr[1]==PORT:
				rtt=((time.time()-time_of_send)*1000)
				print("Reply from",IP,"seq=%d"%count, "time=%.2f"%(rtt),"ms")
				sys.stdout.flush()
				received=1
				break
		except socket.timeout:
			break
		except :
			pass
	count+=	1
	if received==1:
		count_of_received+=1
		rtt_sum+=rtt
		rtt_max=max(rtt_max,rtt)
		rtt_min=min(rtt_min,rtt)
	else:
		print("Request timed out")
		sys.stdout.flush()

	time_remaining=deadline-time.time()
	if(time_remaining>0):
		time.sleep(time_remaining)