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To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: How to set the socket type and the protocol of a socket using create_connection?
Date: Tue, 21 Aug 2012 15:28:37 -0400
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Xref: csiph.com comp.lang.python:27591

On Tue, 21 Aug 2012 10:00:28 -0700 (PDT), Guillaume Comte
<guillaume.comte10@gmail.com> declaimed the following in
gmane.comp.python.general:

> Unfortunatly, my_socket.bind((src_addr, 1)) doesn't work. I get the error message: "socket.error: [Errno 49] Can't assign requested address"...

	Port #1 is in the range of OS privileged ports; you may need root
privileges to bind to it.

http://www.w3.org/Daemon/User/Installation/PrivilegedPorts.html

{Note: one link I hit indicates that M$ Windows does not have this
restriction; and 

>>> s = socket.socket(socket.AF_INET)
>>> s.bind(("", 1))
>>> 

seems to confirm that... OTOH: specifying an invalid IP address
regardless of port produces

>>> s.bind(("192.168.1.10", 1))
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "<string>", line 1, in bind
error: (10049, "Can't assign requested address")
>>> 

whereas using the DHCP assigned address gave

>>> s.close()
>>> s = socket.socket(socket.AF_INET)
>>> s.bind(("192.168.2.101", 1))
>>> 
}
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/