#!/usr/bin/env python3
import sys
from scapy.all import *

dns_server = input("Enter the DNS server IP address: ").strip()
cnt = int(input("Enter the number of requests to send: "))

top_level = ".ch"
domain = dns_server

for i in range(cnt):
    s = RandString(RandNum(1, 8))
    s1 = s.lower()
    q = s1 + "." + domain + top_level
    print(i, q)
    sr1(IP(dst=dns_server)/UDP(sport=RandShort())/DNS(rd=1, qd=DNSQR(qname=q)), verbose=0)