a few tips with olsr on openwrt freifunk

I had this problem with the OLSR web interface on the Freifunk openwrt implementation. If entered the following for the HNA4 field

HNA4: 10.3.13.1 255.255.255.0

Which should advertise the whole 10.3.13.x net it would advertise the 10.0.0.0 net. I discovered that it needs the subnet mask in this format instead

HNA4: 10.3.13.1/24

A few other things I learnt

1. NVRAM variable ff_hna4 stores the HNA4 setting
2. /etc/olsr.conf is ignored by freifunk
3. /rom/etc/olsrd.conf stores a permanent copy of the olsrd setup
4. /var/etc/olsrd.conf is a symbolic link to /tmp/etc/olsrd.conf ... this file is copied from /rom/etc/olsrd.conf into RAM (ramfs filesystem) and is the one called by olsrd.

ps -A will reveal that olsrd is called as follows

olsrd -f /var/etc/olsrd.conf -d 0