kern/64738: SO_REUSEADDR doesn't seem to work with AF_UNIX

David Muir Sharnoff muir at idiom.com
Thu Mar 25 23:00:32 PST 2004


>Number:         64738
>Category:       kern
>Synopsis:       SO_REUSEADDR doesn't seem to work with AF_UNIX
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 25 23:00:31 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     David Muir Sharnoff
>Release:        FreeBSD 4.9-RELEASE i386
>Organization:
Idiom
>Environment:
System: FreeBSD idiom.com 4.9-RELEASE FreeBSD 4.9-RELEASE #23: Wed Nov 19 23:17:38 PST 2003 muir at staid.idiom.com:/build/obj/build/src/sys/IDIOM i386

>Description:
	I was working with milter (using perl Sendmail::Milter) and
	ran into trouble: my milter would not start up because it
	could not bind: Address In Use.

	This was highly repeatable.

	I look at the source (/usr/src/contrib/sendmail/libmilter/listener.c)
	and it clearly sets SO_REUSEADDR regardless of socket type.

	Eventually I gave up and switched to a AF_INET socket.  That
	fixed the problem immediately.  I would have preferred to
	keep with an AF_UNIX socket because it's easier to secure.

>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:


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