Getting local IP address...

[Pekka Pessi]

mfletch at tpresence.com.bbs@openbazaar.net (Mike Fletcher) writes:
>def getLocalHostIP( remote = ("www.python.org", 80)):
>	'''Get the "public" address of the local machine, i.e.
>	that address which is connected to the general internet.
>	Code by Donn Cave, posted to comp.lang.python'''
>	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>	s.connect( remote )
>	ip, localport = s.getsockname()
>	s.close()
>	return ip

>That is actually from a Deja posting, seems to be fairly portable, doesn't
>rely on parsing obscure Unix command responses, is readable, and is
>generally quite reliable. The more common socket-module-based approach (see
>Deja) can be confused if you have multiple network interface cards, but is
>still portable (i.e. if you only have a single network interface card, it
>should work on all system supporting the socket module).

	I have been using a piece of code like this:

def gethostaddr(dst = '224.0.1.41'):
    s = socket.socket(AF_INET, SOCK_DGRAM)
    try:
	s.connect((dst, 7))
	(host, port) = s.getsockname()
	s.close()
	if host != '0.0.0.0':
	    return host
    except error:
	pass
    return socket.gethostbyname(socket.gethostname())

	As an added bonus, no extra connection - UDP just binds the socket
	to your local address. If not, like MS Winsock, it tries true and
	tried gethostbyname(gethostname()) trick.

-- 
Pekka.Pessi at hut.fi