Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!husc6!rice!sun-spots-request
From: edsr!neptune!jcn@central.sun.com (Jim Niemann)
Newsgroups: comp.sys.sun
Subject: arpresolve change in 4.0.3
Keywords: Networks
Message-ID: <389@brazos.Rice.edu>
Date: 21 Jul 89 14:20:26 GMT
Sender: root@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
X-Sun-Spots-Digest: Volume 8, Issue 85, message 8 of 8

For those of you writing network device drivers: In 4.0.3 the calling
sequence to arpresolve has changed.

In 4.0.1 the calling sequence was: arpresolve(&arpcom, &mbuf, &idst, edst,
&usetrailers)

In 4.0.3 the calling sequence was changed to: arpresolve(&arpcom, &mbuf) 

The usetrailers options was dropped altogether. (Under the theory that new
drivers should never generate trailers, but always accept them.)

idst (internet destination) needs to be supplied in a new field in the
arpcom structure (ac_lastip).

edst (ethernet destination) will be returned in a new field in the arpcom
structure (ac_lastarp) 

Aren't you glad that minor dot.dot releases are always source code
compatible!  :-).

Jim Niemann
EDS Research

{sun!texsun, uunet}!edsr!jcn