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