ddptr.py 文件源码

def traceroute_dns_servers(hosts, fqdn):
    """
    Run UDP traceroutes to the given DNS servers, using FQDN in DNS requests.
    """

    log.info("Running UDP traceroutes to %d servers." % len(hosts))

    addrs = [host.addr for host in hosts]
    udp_datagram = scapy.UDP(sport=scapy.RandShort())
    dns_msg = scapy.DNS(qd=scapy.DNSQR(qname=fqdn))

    return scapy.traceroute(addrs, l4=udp_datagram/dns_msg, verbose=0)