python - UDP file transfer with channel -


please me; don't know how process packet rate loss in python 0-10%.

i need write sender.py , receiver.py connect channel , modifiy channel can send picture.

here code channel.py:

# import random import socket socket import *  #vary channel loss rate between 0-10 lossrate = 0  #create udp sockets sender , receiver sendersocket = socket(af_inet, sock_dgram) receiversocket = socket(af_inet, sock_dgram)  # assign ip address , port numbers sockets sendersocket.bind(('127.0.0.1', 5001)) receiversocket.bind(('127.0.0.1', 5002))  receivermessage, receiveraddress = receiversocket.recvfrom(1600) print "receiver ready"  while true:          # receive messages sender      sendermessage, senderaddress = sendersocket.recvfrom(1600)      #forward frame receiver random loss     rand = random.randint(0,99)     if rand > lossrate:         receiversocket.sendto(sendermessage, receiveraddress)     #receive ack receiver                  receivermessage, receiveraddress = receiversocket.recvfrom(1600)              #forward ack sender random loss            rand = random.randint(0,99)         if rand > lossrate:                 sendersocket.sendto(receivermessage, senderaddress)


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