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As there seems to be some interest in this, here is what I did to get tunneling working from hsmm-pi 0.4.0 client to a BBHN 3.0.1 server.This did connected and I could see remote nodes and services listed but it did cause some problems that I haven't worked out yet.
BE WARNED! THIS DID CAUSE SOME PROBLEMS WITH OLSRD SENDING TRUNCATED DATA. DOING THIS MAKE BREAK THE MESH YOU ARE CONNECTING TO SO ONLY USE ON A TEST/DEV NETWORK
Preparation
When connecting to a BBHN tunnel server you are provided with a network IP. This IP address is used to obtain the client and server IPs.
If your network IP is 172.31.15.152 it breaks down to:
Network = 172.31.15.152
Client = 172.31.15.153
Server = 172.31.15.154
Broadcast = 172.31.15.155
You will also need your password for the server and the external IP or server address to connect to. All of the info below assumes you already have a working hsmm-pi node that is connected to an internet connection as a gateway/wan link
Install and configure vtun
Install vtun
sudo apt-get install vtun
Edit /etc/vtund.conf
Here is an example
options {
port 5525;
timeout 60;
syslog daemon;|
}
#Tunnel to server
AB1CDE-172-31-15-152 { #Use your own callsign and network IP to create the tunnel name
passwd MyPaSsWoRd; #Use the password provided by the tunnel server admin
type tun;
proto tcp;
compress lzo:9;
encrypt yes;
keepalive yes;
up { #Replace the IP below with your own IPs.
ifconfig "%% 172.31.15.153 netmask 255.255.255.252 pointopoint 172.31.15.154 mtu 1450";
route "add -net 172.31.15.152/30 gw 172.31.15.154";
};
down {
# Connection is down
};
}
In this example you will need to use your own callsign and network IP based on the info above
Modify the OLSRD config
In the file /etc/olsrd.conf
Find the following line:
Interface “wlan0”
Replace this with:
Interface “tun0” “wlan0”
Find the following line (it occurs twice):
Ip4Broadcast 0.0.0.0
Replace it with:
Ip4Broadcast 255.255.255.255
I left the Mode setting as "Mesh"
Connect to the tunnel server
To connect to the tunnel server run the vtund command
sudo vtund AB1CDE-172.31.15.152 tunserver.callsign.com
In this example you need to change the command to use the tunnel description from vtund.conf and the server IP or address provided by the tunnel server admin
Once the command has been run you should see a new interface called vtun0 if you run the command ifconfig This will not automatically run at boot so the command will need adding to a startup script.
Troubleshooting
If it doesn’t work, try rebooting the Pi. You will need to run the vtund command again to reconnect the tunnel.
You can check if OLSRD is sending data over the tunnel by running the command:
sudo tcpdump –i vtun0
You should see broadcast traffic from the 2 IPs for client and server. If you only see the server IP then it indicates that OLSRD isn’t running correctly locally. Check the config file and reboot the Pi |
