Python: Open a Listening Port Behind a Router (upnp?)

Question

I\'ve developed an application that is essentially just a little ftp server with the ability to specify which directory you wish to share on startup. I\'m using ftplib for t

Answer 1

Looks like there are a few options, one being miniupnp. There are also python bindings for GNUPnP here. For windows minupnp will work, or you could go pure python with miranda-upnp.

There is a nice example of the python GNUPnP bindings being used to open ports on a router here. In that example the lease time is set to 0, which is unlimited. See here for the definition of add_port.

A simple example might be:

#! /usr/bin/python
import gupnp.igd
import glib
from sys import stderr

my_ip = YOUR_IP

igd = gupnp.igd.Simple()
igd.external_ip = None

main = glib.MainLoop()

def mep(igd, proto, eip, erip, port, localip, lport, msg):
    if port == 80:
        igd.external_ip = eip
        main.quit()

def emp(igd, err, proto, ep, lip, lp, msg):
    print >> stderr, "ERR"
    print >> stderr, err, proto, ep, lip, lp, msg
    main.quit()

igd.connect("mapped-external-port", mep)
igd.connect("error-mapping-port", emp)

#igd.add_port("PROTO", EXTERNAL_PORT, INTERNAL_IP, INTERNAL_PORT, LEASE_DURATION_IN_SECONDS, "NAME")
igd.add_port("TCP", 80, my_ip, 8080, 86400, "web")

main.run()