79 lines
3.4 KiB
Text
79 lines
3.4 KiB
Text
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Text file for ipddp.c:
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AppleTalk-IP Decapsulation and AppleTalk-IP Encapsulation
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This text file is written by Jay Schulist <jschlst@samba.org>
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Introduction
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------------
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AppleTalk-IP (IPDDP) is the method computers connected to AppleTalk
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networks can use to communicate via IP. AppleTalk-IP is simply IP datagrams
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inside AppleTalk packets.
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Through this driver you can either allow your Linux box to communicate
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IP over an AppleTalk network or you can provide IP gatewaying functions
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for your AppleTalk users.
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You can currently encapsulate or decapsulate AppleTalk-IP on LocalTalk,
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EtherTalk and PPPTalk. The only limit on the protocol is that of what
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kernel AppleTalk layer and drivers are available.
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Each mode requires its own user space software.
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Compiling AppleTalk-IP Decapsulation/Encapsulation
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=================================================
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AppleTalk-IP decapsulation needs to be compiled into your kernel. You
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will need to turn on AppleTalk-IP driver support. Then you will need to
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select ONE of the two options; IP to AppleTalk-IP encapsulation support or
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AppleTalk-IP to IP decapsulation support. If you compile the driver
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statically you will only be able to use the driver for the function you have
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enabled in the kernel. If you compile the driver as a module you can
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select what mode you want it to run in via a module loading param.
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ipddp_mode=1 for AppleTalk-IP encapsulation and ipddp_mode=2 for
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AppleTalk-IP to IP decapsulation.
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Basic instructions for user space tools
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=======================================
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To enable AppleTalk-IP decapsulation/encapsulation you will need the
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proper tools. You can get the tools for decapsulation from
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http://spacs1.spacs.k12.wi.us/~jschlst/index.html and for encapsulation
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from http://www.maths.unm.edu/~bradford/ltpc.html
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I will briefly describe the operation of the tools, but you will
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need to consult the supporting documentation for each set of tools.
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Decapsulation - You will need to download a software package called
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MacGate. In this distribution there will be a tool called MacRoute
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which enables you to add routes to the kernel for your Macs by hand.
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Also the tool MacRegGateWay is included to register the
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proper IP Gateway and IP addresses for your machine. Included in this
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distribution is a patch to netatalk-1.4b2+asun2.0a17.2 (available from
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ftp.u.washington.edu/pub/user-supported/asun/) this patch is optional
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but it allows automatic adding and deleting of routes for Macs. (Handy
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for locations with large Mac installations)
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Encapsulation - You will need to download a software daemon called ipddpd.
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This software expects there to be an AppleTalk-IP gateway on the network.
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You will also need to add the proper routes to route your Linux box's IP
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traffic out the ipddp interface.
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Common Uses of ipddp.c
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----------------------
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Of course AppleTalk-IP decapsulation and encapsulation, but specifically
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decapsulation is being used most for connecting LocalTalk networks to
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IP networks. Although it has been used on EtherTalk networks to allow
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Macs that are only able to tunnel IP over EtherTalk.
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Encapsulation has been used to allow a Linux box stuck on a LocalTalk
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network to use IP. It should work equally well if you are stuck on an
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EtherTalk only network.
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Further Assistance
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-------------------
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You can contact me (Jay Schulist <jschlst@samba.org>) with any
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questions regarding decapsulation or encapsulation. Bradford W. Johnson
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<johns393@maroon.tc.umn.edu> originally wrote the ipddp.c driver for IP
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encapsulation in AppleTalk.
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