Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!mtxinu!taniwha!paul
From: paul@taniwha.UUCP (Paul Campbell)
Newsgroups: comp.sys.mac.programmer
Subject: Re: BroadCasting over Appletalk
Message-ID: <389@taniwha.UUCP>
Date: 6 Jul 89 06:15:24 GMT
References: <5911@hubcap.clemson.edu> <1152@intercon.UUCP>
Reply-To: paul@taniwha.UUCP (Paul Campbell)
Organization: Taniwha Systems Design, Oakland
Lines: 29

In article <1152@intercon.UUCP> amanda@intercon.uu.net (Amanda Walker) writes:
>In article <5911@hubcap.clemson.edu>, mikeoro@hubcap.clemson.edu (Michael K
>O'Rourke) writes:
>> First, I know that with a DDPWrite, if i set the nodeid to 255, it will 
>> broadcast the message of the net.  Will ATP do likewise if i set the nodeid
>> to 255?
>
>Wince.  ATP is strictly a transaction protocol (hence the "T"), and only
>works between two nodes.  If you think about it, the reasons are pretty
>...

Actually you can use the non-exactly-once form of ATP to talk to a known
socket in a sort of broadcast to all the servers on a net using this socket
number, you simply get back the first one that replies (you probably have
to ask for just one packet in response).

This is of course not recommended due to the havock lots of this sort of
thing plays with a net of any size [do not try this stunt at home ....].
Also DDP's lack of an internet broadcast (hooray!) makes this inconvenient
to do on any other than the local wire.

	Paul


-- 
Paul Campbell    UUCP: ..!mtxinu!taniwha!paul     AppleLink: D3213
"Free Market": n. (colloq.) a primitive fertility goddess worshipped by an
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