cck@CUNIXC.CC.COLUMBIA.EDU (Charlie C. Kim) (10/13/88)
WARNING: THE FOLLOWING DESCRIBES EXPERIMENTAL SOFTWARE THAT IS NOT MEANT FOR ANY SORT OF GENERAL DISTRIBUTION OR USE. The Unix AppleTalk Bridge (uab) allows certain unix systems to act as AppleTalk Bridges. uab can be functionally divided into two parts. The first is the actual AppleTalk Bridge implementation and the second are the routines that define particular "Link Access Protocols" (aka "hardware" delivery methods e.g. EtherTalk). uab also supports an internal demultiplexing that allows packets delivered to the uab node to be delivered to other processes within that system. Currently, uab runs on Ultrix 1.2 (and beyond) and SunOS 4.0 and supports EtherTalk. Unfortunately, with the current definition of KIP's UDP encapsulation and delivery rules, it is not feasible to implement KIP. The only internal packet delivery mechanism defined is a modified version of KIP's UDP encapsulation (modified-KIP) that uses a different UDP port range over the internal loopback; thus CAP programs must be relinked with a different low level delivery mechanism to work with uab. Note that all packets for these programs are sent and received through the uab process. Since uab does not understand KIP, it is necessary to have an AppleTalk Bridge that understands both KIP encapsulation and EtherTalk before KIP based "systems" (e.g. programs compiled with CAP, bridges that only speak KIP on the ethernet interface--revisions of KIP before 2/88, etc) can work with uab's modified-KIP based programs. This software is being distributed to encourage development of better internal delivery mechanisms and alternate lap methods. This software requires CAP libraries and include files. uab, in the current form, is meant only for those who have a solid understanding of the AppleTalk protocols in relation to AppleTalk bridges (documented in Inside AppleTalk). uab is NOT meant for general distribution or use and questions relating to such will probably be ignored. The current distribution of uab is meant for developers to try out. uab is Copyright 1988 by The Trustees of Columbia University in the City of New York. To retrieve uab, use anonymous ftp to connect to cunixc.cc.columbia.edu (128.59.40.130). Retrieve uab.shar in the directory uab. Charlie C. Kim Academic Computing and Communications Group Center for Computing Activities Columbia University
rich@sendai.sendai.ann-arbor.mi.us (K. Richard Magill) (08/12/89)
I'd like very much to talk to anyone who's got it running at all, much less on a decstation. -- rich.