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diff --git a/root/HOWTO-NewPPP b/root/HOWTO-NewPPP new file mode 100644 index 0000000..4de0cc8 --- a/dev/null +++ b/root/HOWTO-NewPPP @@ -0,0 +1,149 @@ +Qtopia now supports PPP connections to the handheld from both +Linux and Windows systems. This means you can use all the usual +TCP/IP software such as Telnet, SSH, FTP, and HTTP to communicate +between the desktop and handheld. This facility is used in the +synchronization framework. + + +Creating a unattended PPP connection. + +On trying to create a connection between a Windows 2000 box and the IPaq, it +was discovered that there was a strange issue with the Direct Connection +driver. It caused problems on opening up a terminal to do the login. +Furthermore, scripting appeared to be broken, at least on Service Pack 2. +So we needed to come up with an alternate way to make a connection, not +involving a login. + +On a direct cable connection, Windows 2000 sends CLIENT over the line, +expecting something from the server to be sent back before it will start its +PPP communication. What follows is what are instructions for modifying the +IPaq to accept Windows 2000 connections, Configuring Windows 2000 to connect +to the IPaq, and the modifications that need to be done to a Linux machine +to connect to the IPaq again. I'll finish it off with a few known issues. + +Setting up the IPaq (Server). + +Setting up the IPaq is fairly painless. Just install the ppp.ipk +If that is not an option, here are the relevant changes you need to make. + +1. First back up these files: /etc/hosts, /etc/ppp/options, and /etc/inittab. +2. Make you hosts file look like the following. Note that IPaq will be the + address of your device and desktop the IP of you machine. + #/etc/hosts + 127.0.0.1 localhost familiar + 192.168.1.101 ipaq + 192.168.1.100 desktop +3. Create a /etc/ppp/scripts directory. +4. Add the file, winclient.chat, to /etc/ppp/scripts. It will look like: + # /etc/ppp/options/winclient.chat + TIMEOUT 3600 + CLIENT CLIENTSERVER\c +5. Make your /etc/ppp/options file look like this, you may have + to replace the connect line with the proper chat location: + #/etc/ppp/options + connect '/usr/sbin/chat -v -s -f /etc/ppp/scripts/winclient.chat' + -detach + asyncmap 0 + crtscts + local + lock + /dev/ttySA0 + 115200 + ipaq:desktop +6. Now you have to edit you /etc/inittab, since this is a fairly large file, + I will tell you what to change. At the bottom of the file there is + probably a reference to a getty process that runs on the serial port that + looks something like this. + T0:23:respawn:/sbin/getty -L ttySA0 115200 vt100 + We want to pppd running on this port too, and we can't have getty running + at the same time. So remove the above getty line and add these two lines. + T0:45:respawn:/sbin/getty -L ttySA0 115200 vt100 + pd:23:respawn:/usr/sbin/pppd /dev/ttySA0 -detach + What this does is create a pppd process that will listen at run levels 2 and + 3. And a getty process at run levels 4 and 5. This is an insurance method. + This way you can use the terminal in the Qtopia Environment and change + the run level to run a getty on the serial console in case you would need + the it. +7. Okay that's it, either have init re-read the file by running init q or + reboot the IPaq, which ever is more convenient. + +Setting Up the Windows 2000 (Client) + +Setting up the Windows 2000 connection is also fairly painless. Follow the steps +below, it doesn't hurt to be in the Administrator group. First we need to +make sure that Windows 2000 knows that you want a serial connection. While the +New Connection Wizard will normally allow you to pick the correct port, +sometimes it won't. To avoid problems, we'll install it ourselves. + +To install the "serial cradle" +1. Load up the Control Panel (Select Settings*Control Panel from the Start Menu) +2. Select Phones and Modems. +3. Select the Modem Tab and then click the New... Button. +4. In the Dialog that pops up, check the "Don't Detect I will select from + a list" option. +5. In the standard modem types group, select the Communications Cable Between + Two Computers. Then click next. +6. Select the COM port that your IPaq is connected to, then click Finish. + +Now the connection can be made. +1. Select Start*Settings*Network and Dial-Up Connections +2. Select "Make New Connection". This fires up the New Connection Wizard. +3. In the wizard that shows up, select next to get past the introductory screen +4. Select "Connect Directly to Another Computer", then click "Next". +5. Select the COM port that your IPaq is connected to, then click "Next". +6. Enter a meaningful name for your newly created connection and then click + "Finish". +7. You will then be presented with a dialog asking for a user name and password + Just click cancel. +8. Right click on your new connection and select properties. +9. Click on the "Configure" button in the General tab. +10. Choose the proper connection speed (in this case 115200) +11. Uncheck the "Enable Hardware Flow Control" option. +12. Close the Modem Configuration Dialog by clicking Ok +13. In the Options Tab, uncheck the "Prompt for Name, Password, certificate, + etc." option. +14. In the Networking Tab, uncheck the "File and Printer Sharing for Microsoft + Networks" and "Client for Microsoft Networks" options. In other words, only + the "Internet Protocol(TCP/IP)" should be checked. +15. You are done, click "Ok". + +Select your new connection and it a progress dialog should show up, and soon your +Windows 2000 machine and the IPaq are happily passing PPP frames back and +fourth. + +Setting up a Linux Box (Client) + +Since we've changed the way the IPaq deals with connections, we also need to +change the way a Linux client would connect to the IPaq. Basically, the options +file needs to be changed. We also need to emulate Windows 2000's need to emit +CLIENT at the beginning. Here is the chat script for that, which I would +recommend putting in /etc/ppp/scripts as winserver.chat + #/etc/ppp/scripts/winserver.chat + TIMEOUT 10 + '' CLIENT\c + +Here is the new peers file for the Linux client. + #/etc/ppp/peers/ipaq + -detach + local + nocrtscts + lock + /dev/modem + connect '/usr/bin/chat -f /etc/ppp/scripts/winserver.chat' + 115200 +Please note that /dev/modem is a symlink that whatever COM port your IPaq is +on. Replace it appropriately, or create the symlink yourself. After that, you +should be able to just type 'pppd call ipaq' and play happily with your IPaq. + +Known Issues: +Here are a few known issues that aren't addressed in this document, several +are on the shortcomings of the Windows 2000 Connection. +* If your screen blanks out, pppd suspends itself and the Windows 2000 ppp + implementation will die, however when it awakens, pppd on the IPaq will + be fine and won't exit, making it impossible to run connect again. + The best workaround for this is to disable screen blanking by uncheck-ing + the "Blank after some inactivity" option in the Light Settings in Qt + Palmtop Settings tab. If this does happen to you, the path to least + resistance is to reboot. +* When the direct cable connection is enabled on Windows 2000, the routing table + is changed, effectively making it impossible to use the Internet. |