dns stuff

import time
from socket import *
from utils import *

hostNames = ["google.com", "facebook.com", "uiowa.edu"]
DNSservers = ["168.1.79.229", "156.154.70.1", "138.197.25.214", "94.206.181.22", "122.176.20.6", "217.73.226.120", "27.34.140.46", "110.165.44.152", "187.86.59.3", "128.255.1.3"]
data = {}

def sendUDP(packet, address):
    udpSocket = socket.socket(AF_INET, SOCK_DGRAM)
    udpSocket.sendto(packet, (address, 53))
    message, address = udpSocket.recvfrom(1000)
    ip = decode_dns_message(message)
    udpSocket.close()
    return ip

def sendTCP(webServer):
    tcpSocket = socket.socket(AF_INET, SOCK_STREAM)
    t1 = time.time()
    tcpSocket.connect((webServer, 80))
    t2 = time.time()
    tcpSocket.close()
    return t2 - t1

for hostName in hostNames:
    print(hostName)
    packet = create_DNS_query(hostName)
    index = 0
    while index < len(DNSservers):
        dnsIP = DNSservers[index]
        webServer = sendUDP(packet, dnsIP)
        print(webServer)
        if webServer != "NULL" :
            data[hostName] = [webServer]
            index += 1
            totalTripTime = 0
            for trip in range(0,9):
                time = sendTCP(webServer)
            avgRTT = totalTripTime/10
            data[hostName].append(avgRTT)

print(data)