问如何使用scapy处理python - traceroute脚本中超时请求

EN

import sys
i, o, e = sys.stdin, sys.stdout, sys.stderr
from scapy.all import *
sys.stdin, sys.stdout, sys.stderr = i, o, e

def main():
    hostname = input("Enter the destination")
    done = False
    distance = 1
    while not done:
        tracert_packet = IP(dst=hostname, ttl=distance)/ICMP()
        # Send the packet and get a reply
        tracert_resopnse = sr1(tracert_packet, verbose=0)/ICMP()
        if tracert_resopnse.type == 3:
            # We've reached our destination
            print("Done!" + tracert_resopnse[IP].src)
            done = True
        else:
            # We haven't got to the destination yet
            print(str(distance) +" hops away: "+ str(tracert_resopnse.src))
            distance += 1

if __name__ == '__main__':
    main()