[英]How to fix socket.timeout and receiving data
我之前寫過該程序,現在它停止工作了。 每次我運行它時,都說“超時”。 當我將超時設置為更高(例如10秒)時,也會發生此錯誤。
import sys
import socket
def traceroute(dest_addr, max_hops=30, timeout=0.2):
proto_icmp = socket.getprotobyname('icmp')
proto_udp = socket.getprotobyname('udp')
port = 33434
for ttl in range(1, max_hops+1):
rx = socket.socket(socket.AF_INET, socket.SOCK_RAW, proto_icmp)
rx.settimeout(timeout)
rx.bind(('', port))
tx = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, proto_udp)
tx.setsockopt(socket.SOL_IP, socket.IP_TTL, ttl)
tx.sendto(bytes('', 'utf-8'), (dest_addr, port))
try:
data, curr_addr = rx.recvfrom(512)
curr_addr = curr_addr[0]
except socket.error as err:
print (err)
curr_addr = None
finally:
rx.close()
tx.close()
yield curr_addr
if (curr_addr == dest_addr):
break
if __name__ == "__main__":
dest_name = "www.google.de"
dest_addr = socket.gethostbyname(dest_name)
print("traceroute to %s (%s)" % (dest_name, dest_addr))
for i, v in enumerate(traceroute(dest_addr)):
print("%d\t%s" % (i+1, v))
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