Re: [BEHAVE] (no subject)

ivan c <ivan@cacaoweb.org> Thu, 27 June 2013 14:50 UTC

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Date: Thu, 27 Jun 2013 16:51:07 +0200
From: ivan c <ivan@cacaoweb.org>
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Subject: Re: [BEHAVE] (no subject)
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On Thu, 27 Jun 2013 10:23:29 -0400, "ietfdbh" <ietfdbh@comcast.net> wrote:
> -----Original Message-----
> From: behave-bounces@ietf.org [mailto:behave-bounces@ietf.org] On Behalf
> Of ivan c
> 
> Without the option SO_REUSEADDR, this is forbidden POSIX behavior
> [dbh>] 
> Ivan, can you provide a reference to the POSIX document and section that
> says this is forbidden?
> If we design for this restriction, the document should provide a
reference
> so readers know why.
> 
> David Harrington
> ietfdbh@comcast.net


This is taken from "The Open Group Base Specifications" (or informally The
Single Unix Specification), by the IEEE.
Volume "System Interfaces", function "bind()":


"The bind() function shall fail if:

[EADDRINUSE]
    The specified address is already in use."



As we mentioned in our posts, this can be bypassed by the use of the
SO_REUSEADDR option, which behavior is unspecified by POSIX but has
consistent semantics across major OSes.
It is now defined with the following: 
"SO_REUSEADDR
    Specifies that the rules used in validating addresses supplied to
bind() should allow reuse of local addresses, if this is supported by the
protocol. This option takes an int value. This is a Boolean option."




-- 
_Ivan Chollet_