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To: Archie Cobbs <archie@whistle.com>
cc: hasty@rah.star-gate.com (Amancio Hasty), mike@smith.net.au,
        current@freefall.FreeBSD.org
Subject: Re: tcp/ip buglet ? 
In-reply-to: Your message of "Tue, 25 Nov 1997 16:32:15 -0800."
             <199711260032.QAA03552@bubba.whistle.com> 
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Date: Wed, 26 Nov 1997 11:11:23 +1030
From: Mike Smith <mike@smith.net.au>
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> 
> > The port and address of addr are 0....
> > 
> > The linux layer call is :
> > 
> > /sys/i386/linux/linux_socket.c:linux_sendto
> > 
> > I am pretty sure that linux_sendto is correct.
> 
> Not sure what the problem is here. However, I remember a similar
> situation once a long time ago and the fix was to make sure that
> the struct sockaddr_in was completely zeroed and the sa_len field
> was properly set before doing the bind.

The Linux sockaddr structure doesn't have an sa_len field; it gets 
fixed up via the compatability code in uipc_syscalls.s:getsockaddr().  
If COMPAT_43 is missing from the kernel, this won't happen.  (But AFAIK 
other things break at that point.)

mike