From pvickers@broadpark.no Fri Jun 09 11:43:52 2006
Message-id: <24FA8629-6199-4CBB-8A53-C4F3D24F461B@broadpark.no>
Date: Fri, 09 Jun 2006 00:43:26 +0200
From: Pete Vickers <pvickers@broadpark.no>
Subject: GPRS PPP for UNIX Laptops
To: randy@psg.com

Hi Randy,


I recently needed to get OpenBSD's in-kernel pppd working with my  
'com1' attached mobile phone 'modem'.  It took me a bit of googling &  
experimentation since the FAQ (http://www.openbsd.org/faq/ 
faq6.html#PPP) ignores pppd.

Prehaps notes are useful to you (or your gprs page)


Example senario:
	- haynes 'AT' compatible modem on 'COM1' (first RS-232 UART)
	- using OpenBSD inkernel ppp daemon
	- dial up on boot & automatic redial upon link failure.

Configuration:
	- sample file contents (including extra AT commands to unlock mobile  
phone PIN etc)


show connecting on 'COM1' at 57600baud, adding a system default route  
via the new ppp link, and automatically redialing immediately after  
link failure:
=========/etc/ppp/peers/ISP====================
/dev/tty00
57600
defaultroute
debug
#kdebug 7
lock
user my_username
noauth
noccp
novj
noipdefault
persist
#demand
connect '/usr/sbin/chat -e -v -f /etc/ppp/peers/chat/ISP-gprs'
=============================================

script to initialise modem, and dial ISP:
=========/etc/ppp/peers/chat/ISP-gprs====================
REPORT "Starting chat script..."
ABORT ERROR
ABORT BUSY
ABORT 'NO CARRIER'
ABORT 'NO DIALTONE'
'' ATZ
OK AT+CFUN=1,1
OK \d\dAT+CPIN=1234
OK AT+CGDCONT=1
OK AT+CGDCONT=1,"IP","my.apn.name",,0,0
OK ATD*99***1#
CONNECT
=============================================


your ISP username & password (see pap-secrets instead if applicable):
=========/etc/ppp/peers/chap-secrets====================
#secrets for authentication using CHAP
# client        server  secret                  IP addresses
my_username          *       my_password        *
=============================================


create the i/f at boot time, and initiate connection:
=========/etc/hostname.ppp0====================
up
!pppd call ISP
=============================================


To debug:
	- $ sudo ifconfig ppp0 create
	- $ sudo pppd dial ISP
	- tail /var/log/daemon, /var/log/chat (after syslogd.conf uncomment)  
and /etc/ppp/connection-errors



Hope this is of use.

/Pete

www.petevickers.com