How do I reconnect a disconnected socket?

[terron]

I'm trying to make something that once it is disconnected will automatically try to reconnect. I'll add some more features in later so it doesn't hammer the server but right now I just want to keep it simple and get that part working. The problem is that when I use sock.close I get an error message of

Bad File Descriptor

and if I either use shutdown or just go straight to reconnecting I get:

Transport endpoint is already connected

This is what I've got right now:

#! /usr/bin/env python
import socket, string
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
def doconn():
    sock.connect(("localhost", 1234))
def dodiscon():
    sock.close()
    doconn()

doconn()

while (1):
    buffer = sock.recv(1024)
    if not buffer:
        dodiscon()

What am I doing wrong?

[Subsciber123]

I'm trying to make something that once it is disconnected will automatically try to reconnect. I'll add some more features in later so it doesn't hammer the server but right now I just want to keep it simple and get that part working. The problem is that when I use sock.close I get an error message of

Bad File Descriptor

and if I either use shutdown or just go straight to reconnecting I get:

Transport endpoint is already connected

This is what I've got right now:
[code=python]
#! /usr/bin/env python
import socket, string
sock = socket.socket(s ocket.AF_INET, socket.SOCK_STR EAM)
def doconn():
sock.connect((" localhost", 1234))
def dodiscon():
sock.close()
doconn()

doconn()

while (1):
buffer = sock.recv(1024)
if not buffer:
dodiscon()
[/code]

What am I doing wrong?

You already closed sock. Now you cannot reuse it. You must create another socket. Here, I think that this should work:

[code=python]
#! /usr/bin/env python
import socket, string
def doconn():
sock = socket.socket() # this assumes what you stated explicitly before, as they are the default values
sock.connect((" ", 1234)) # you don't have to state "localhost" , an empty string will do
return sock
def dorecon(sock):
sock.close()
return doconn()

sock=doconn()

while 1: # grrr! this is not lisp! try not to use parens!
buffer = sock.recv(1024)
if not buffer:
sock=dorecon(so ck)
[/code]

I also renamed the second function name so that it made more sense.
btw: not that there is anything wrong with lisp, just python is not it.
Also, use [ code=python ] [ /code ] (without spaces) in order to get syntax highlighting