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Date:      Tue, 15 Oct 2002 00:17:49 +0100
From:      Ian Dowse <iedowse@maths.tcd.ie>
To:        Christopher Weimann <cweimann@k12hq.com>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: accept() doesn't pass back sockaddr 
Message-ID:   <200210150017.aa28289@salmon.maths.tcd.ie>
In-Reply-To: Your message of "Mon, 14 Oct 2002 18:31:58 EDT." <20021014183158.B54055@mail.k12us.com> 

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In message <20021014183158.B54055@mail.k12us.com>, Christopher Weimann writes:
>I am using on a web filter ( dansguardian.org ) and am having
>problems on FreeBSD (4.5-STABLE).  The filter runs fine for
>about 20 minutes or so then can't seem to come up with the
>right ip addresses for any client machines.
>
>After much reading of man pages, Stevens, and some banging 
>of my head against the desk I decided that maybe it wasn't 
>me :)  I found a PR that I think seems to relate (misc/34307) 
>but this still confuses me.  I would think that if the 
>situation this PR describes were to be the case all sorts 
>of things wouldn't be working right.

Is the code in question correctly initialising the variable that
the `addrlen' parameter points to before calling accept?  It looks
as if this might be the problem in the PR you mention. I mean that
the code should look like

	sin_len = sizeof(sin);
	s = accept(servsock, (struct sockaddr *)&sin, &sin_len);

where `sin_len' is reset to the correct length before calling
accept() each time. I think sin_len may be reset to 0 when an error
occurs, but otherwise you would get away with not resetting it.

Ian

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