HamachiVPN

From WebOS Internals

Jump to: navigation, search

Contents

Hamachi VPN for Palm Pre

This document assumes you're familiar with the Hamachi VPN, specifically the linux version. It is geared towards a person wanting to "get it working" on the Pre. If you're not familiar, there are endless Googlable web pages that describe running Hamachi on desktop linux systems you can use for reference.

Become root:

sudo su

Make the filesystem writable:

mount -o remount,rw /

Download the hamachi binary to your pre via wget:

Note: It is recommended that you use the nokia build, because it included the install script. Whereas the direct hamachi link would require that make be installed.
cd /opt/share
wget http://files.hamachi.cc/linux/nokia-770/hamachi-0.9.9.9-20-lnx-n770.tar.gz

Unpack the archive:

tar zxvf hamachi-0.9.9.9-20-lnx-n770.tar.gz
cd hamachi-n770-0.9.9.9-20

Hamachi depends on libcrypto.so.0.9.7. The Palm Pre has libcrypto.so.0.9.8 installed. I made a symlink, and it worked. So...

ln -s /usr/lib/libcrypto.so.0.9.8 /usr/lib/libcrypto.so.0.9.7

Edit the "install" script using your favorite editor (like vi) to change the installation locations. Also fix line 7 or you'll get an error.

I changed it to:

HAMACHI_DST=/opt/bin
TUNCFG_DST=/opt/sbin
 
echo
echo Copying hamachi into $HAMACHI_DST ..

Then follow the instructions in the README under Quick Start, but basically:

./install
/opt/sbin/tuncfg
hamachi-init
hamachi start
hamachi login
hamachi set-nick <your nickname>
hamachi join <network>
hamachi go-online

Hint

Adding your Pre to your Windows hamachiVPN.

If you want to join a group made on the hamachi.cc (the official logmein page) webpage you need the group ID (joining by group name fails). 
On the logmein website click on My Computers and on the left side click on the Network tab. 
You can create a new network here under "add network" 
To get an ID for an existing network click on "edit" on the right side of the group name. 
This will bring up the edit page under the ID is the 9 digit group ID (XXX-XXX-XXX) with dashes these are also part of the group ID.
To join this network on your pre type "hamachi join (9 digit ID don't forget the dashes) (password)".

If you use Hamachi to connect to web services running on your machines at home or elsewhere, you might make your life easier by adding some entries to the /etc/hosts file. Then you can access your servers by name instead of having to use the Hamachi 5.x.x.x IP addresses.

A simple sample entry in /etc/hosts which would allow you to access your server "beaker" at 5.1.2.3 would be: (Add your servers below the "castle" line.)

127.0.0.1       localhost.localdomain           localhost
127.0.0.1 castle
5.1.2.3 beaker

When done, make the filesystem read-only again:

mount -o remount,ro /

Ping Test

When you've got hamachi up, you can try pinging one of your servers.

root@castle:/var/home/root# ping beaker
PING beaker (5.1.2.3): 56 data bytes
64 bytes from 5.1.2.3: seq=0 ttl=128 time=5.493 ms
64 bytes from 5.1.2.3: seq=1 ttl=128 time=32.257 ms
64 bytes from 5.1.2.3: seq=2 ttl=128 time=56.976 ms
64 bytes from 5.1.2.3: seq=3 ttl=128 time=74.249 ms

Sleep/Wake and Battery Impact

On first testing:

  • When the device went to sleep, the VPN went down.
  • When the device woke up, the VPN came back up and was pingable again.

This morning, while at my workstation, and with the Pre idle in my pocket, I noticed my Pre was available/pingable on Hamachi. I am not totally sure of what the long-term battery impact might be of running Hamachi on the Pre. I'm not yet sure if it keeps the device "awake" all the time, which clearly would drain the battery. I have push GMail IMAP going, so I assume there is some kind of connection either being periodically established or constantly maintained. But I don't know enough about the networking aspects to determine at this time whether running Hamachi all the time will negatively impact the battery. Feel free to message me if you learn anything.

Further Testing:

  • With Hamachi running I would achieve 12 hours of battery life on my pre
  • Without Hamachi running after 12 hours I am sitting at 60% battery life

So to conclude running Hamachi all the time significantly decreases battery life in my situation. I personally would not recommend running Hamachi all the the time.

Upstart script

This script will start Hamachi up after a reboot.

Place the following script in /etc/event.d/hamachi

description "Hamachi VPN for WebOS"
version 1.0
 
# don't start until the WebOS finishes it's normal boot
# that way no delay is added to the GUI startup
start on stopped finish
stop on runlevel [!2]
 
console output
 
script
  /opt/bin/hamachi -c /var/home/root/.hamachi start 2>&1 /var/home/root/hamachi.log
end script
 
pre-start script
  /opt/sbin/tuncfg
end script
Personal tools
Google AdSense