I think netType determines the arguments to socket(), not to bind(). 
Currently the options are TCP and UDP,  which sounds irrelevant to what
you're after.  There's currently no way to choose the address that
should be listened at, much less the specific interface that should be
used.


If you want this enough, it seems perfectly reasonable to add something
like #bindToAddress:port: to Socket, and then to add the corresponding
stuff to SocketPlugin and to sqUnixNetwork.c.  The method might look
like:

	bindToAddress: aByteArray  port: anInteger
		"bind this socket to the given address and port.  all-0's and 0 may be
specified, respectively, if the caller doesn't care"
		<primitive: 'bindToAddress' module: 'SocketPlugin'>
		^nil  


Then you need to add a platform-independent version of the primitive to
SocketPlugin, do "SocketPlugin translate", and add the Linux-specific
version to sqUnixNetwork.c.  Of course, you need the source files for
the Unix VM, too -- Ian Piumart's version 2.8pre5 appears to be the one
to go for right now.

So, it's doable, if a fair bit of time is available.  :|

-Lex



merlyn at stonehenge.com (Randal L. Schwartz) wrote:
> 
> After an admittedly cursory examination of Socket, I see only
> the comment of:
> 
>         The netType parameter is platform dependent and can be used to
>         encode both the protocol type (IP, Xerox XNS, etc.) and/or the
>         physical network interface to use if this host is connected to
>         multiple networks. A zero netType means to use IP protocols
>         and the primary (or only) network interface.
> 
> in Socket>>primSocketCreateNetwork:type:receiveBufferSize:sendBufSize:semaIndex:
> 
> Has anyone done any work to document how this works for the various
> platforms, or try to make this a little more portable?
> 
> Specifically, I need this to bind to a particular interface on a Linux
> box for my ISP.
> 
> It looks like sqUnixSocket.c ignores that parameter, creating
> an INADDR_ANY socket every time.
> 
> -- 
> Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
> <merlyn at stonehenge.com> <URL:http://www.stonehenge.com/merlyn/>
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