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今天测试网络的发送超时,写的简单程序,却出现异常行为,不解中
server.py
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
server_socket.bind(("", 1234))
server_socket.listen(5)
print "begin accept"
client_socket,address = server_socket.accept()
client_socket.setsockopt(socket.SOL_SOCKET,socket.SO_RCVBUF,0)
print "accept finish"
ret = client_socket.recv(4096)
print ret
time.sleep(10000000)
print "ret",ret
client.py:
import socket
import time
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(("localhost",1234))
print client_socket
print "send data"
client_socket.setsockopt(socket.SOL_SOCKET,socket.SO_SNDBUF,1)
total = 0
while 1:
ret = client_socket.send("hello,world")
total += ret
print "send %d" % total
time.sleep(100)
我先启动server,然后启动client,一切正常。然后我关闭client(ctrl + c) , 在执行client,奇怪的是client还可以连上server,并且可以继续发送数据!!!但是server只做了一次accept,这后一次是怎样连上的啊?
通过netstat观察,确实是有个新的连接
tcp 0 0 localhost.localdomain:57341 localhost.localdomain:1234 FIN_WAIT2
tcp 0 12 localhost.localdomain:57340 localhost.localdomain:1234 FIN_WAIT1
这后一个连接是怎样连上的啊? |
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