[Tutor] Quick networking question

[Danny Yoo]

On Tue, 18 Apr 2006, Tino Dai wrote:

>      I am writing a script to do some simple networking. When I do a 
> close on the socket and exit the program, I getting a time wait on the 
> port, and the port can''t be utilized again until the time wait 
> disappears. How do I get port to shut down and be able to reuse that 
> port?

Hi Tino,

Ah!  You may want to take a look at some sample use of networking in the 
SocketServer:

http://svn.python.org/view/python/trunk/Lib/SocketServer.py?rev=39194&view=markup

In particular, take a look at:

     def server_bind(self):
         """Called by constructor to bind the socket.

         May be overridden.

         """
         if self.allow_reuse_address:
             self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         self.socket.bind(self.server_address)

If we're using SocketServer class to build your socket servers, we set the 
allow_reuse_address attribute to True

     (See: http://www.python.org/doc/lib/node536.html)

If we're building server sockets from scratch, we'll want to do that magic 
line:

     socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

right before binding the socket to the address.


Best of wishes!