At Wed, 14 Jun 2006 11:48:52 -0700,
Jason Thorpe wrote:
> 
> 
> On Jun 14, 2006, at 8:36 AM, Brian Ginsbach wrote:
> 
> >
> > Module Name:	src
> > Committed By:	ginsbach
> > Date:		Wed Jun 14 15:36:00 UTC 2006
> >
> > Modified Files:
> > 	src/crypto/dist/ssh: sshconnect.c
> >
> > Log Message:
> > Adapt to new return value from socket(2) for an unsupported
> > protocol/address family.
> 
> We probably should have versioned the system call for this.  The old  
> return value has been part of the ABI for a long time.

There's a discussion about this on tech-kern.