Establishing a InfraRed PPP Connection
		    between Linux and a Palm
			By Ed, 11-30-00
		      www.narced.com/linux


	The purpose of this document is to show how to establish a PPP
connection between a Palm and computer running Linux with an Extended
Systems XTNDAccess (ESI 9680 - formerly called JetEye PC) dongle hooked up
to its serial port. Details or the ESI 9680 can be found at
http://www.extendedsystems.com/products/infrared/jeteyepc.html . With a
PPP connection, a Palm user is then able to do a Network Sync, sync
Avangto (www.avantgo.com), run telnet, etc.

	These instructions should work with any other IR dongle/connector
that is supported by the Linux Kernel and the IrDA Utilities (mentioned
below).

	Special thanks to the authors/contributors of the Linux Infrared
HOWTO (available at http://mobilix.org/Infrared-HOWTO/Infrared-HOWTO.html
or http://www.ibiblio.org/pub/Linux/docs/HOWTO/Infrared-HOWTO ) - without
them, there was no way I'd ever figure this out!




			*** Linux Setup ***

1. Compile Kernel with IrDA, PPP, and ip-firewalls/masquerading stuff


2. Download latest IrDA Utils from:
	ftp://irda.sourceforge.net/pub/irda/irda-utils/
Compile/install it:  tar -xzvf <irda-filename> ; make ; make install


3. Set up IR /dev devices that will be used by PPP and other programs:
	mknod /dev/ircomm0 c 161 0	#this points to /dev/ttyS0
	mknod /dev/ircomm1 c 161 1	#this points to /dev/ttyS1


4. irattach /dev/ttyS0 -d esi

	This setup assumes you are using the FIRST serial port (COM1 under
DOS/Windows) The "-d esi" option specifies that I'm using the ESI 9680. It
also supports others, including the ActiSys 220L/220L+. Details at:
	http://www.actisys.com/ac200-220.html


5. irppp - script to start the connection on the Linux side
-------------------------
#!/bin/sh

SPEED=57600
LOCALIP=192.168.3.20
REMOTEIP=192.168.3.21
DNS=198.4.75.100


# Start IPCHAINS stuff
echo 1 > /proc/sys/net/ipv4/ip_forward
/sbin/ipchains -P forward DENY
/sbin/ipchains -A forward -s 192.168.3.0/255.255.255.0 -j MASQ


# Kill and then Start PPP
killall -9 pppd
clear
/usr/sbin/pppd /dev/ircomm0 $SPEED $LOCALIP:$REMOTEIP passive silent persist noauth local nodetach ms-dns $DNS &
-------------------------




			*** Palm Setup ***

	These instructions are for PalmOS 3.5.x. I assume 3.3 and above
should work fine. PalmOS version 3.1 (burned into the ROM of the IIIe)
needs the IR Enhancement offered by Palm at:
	http://www.palm.com/support/downloads/irenhanc.html

1. Go to Home | System (top right pull-down menu) | Prefs


2. Choose "Connection" in the top right pull-down menu.


3. Select "IR to PC/Handheld" and click "Edit"


4. "Connection Method" should be set to "IrCOMM to PC"


5. Click "Details":
	"Speed" = "57600"
	"Flow Control" = "Automatic"


6. Click "OK" and then "OK" again.


7. Go to "Network" in the top right pull-down menu.


8. Pick anything under "Service" and rename it if you like (they are all
essentially the same). Something like "IR Connection" seems appropriate.


9. Leave "Username" and "Password" blank; they are unnecessary.


10. "Connection" should be set to "IR to PC/Handheld"


11. Click "Details"

	"Connection Type" = "PPP"
	"Idle Timeout" = "Power Off"
	"Query DNS" and "IP Address Automatic" should both be checked


12. Click "Script" - it should be set to "End" as the first and only entry
(this is how the script is disabled).


13. Click "OK" and "OK" again. At this point, aim the Palm at the IR Port
and press "Connect"!