====== Mesh RPi ======
This article describes the needed modifications for PirateBox RPi image **1.1.3** to get a similar setup like on OpenWrt. Similar setup means a bridged network between AP and Mesh. 

**Note:** Due to kernel incompatibilities of BATMAN-advanced betweeen OpenWrt and RPi, both Systems can not talk to each other.

Requirements:

  - 2nd wifi card for mesh only
  - some time ;)

All the scripts will be executed on the Pi. The configuration consists of the following steps:

   - Setup a software bridge
   - Reconfigure PirateBox to make use use of the bridge interface
   - Enable IPv6 configuration for PirateBox
   - Create Mesh setup script & make it bootable
   - Configure Avahi to announce PirateBox

===== Prereq. =====
Check the internet is working and sudo is active:

  sudo touch /tmp/sudo_test
  sudo rm /etc/resolv.conf
  sudo sh -c 'echo "nameserver 8.8.8.8" > /etc/resolv.conf'
  dig google.de | grep -q -e 192.168.77.1 && echo "error, Internet is not working!"


===== Software bridge =====
Create the network configuration file for the bridge:
  
  cat <<EOF > piratebox_bridge
  Description="General bridge interface for PirateBox"
  Connection=bridge
  Interface=br-lan
  BindsToInterfaces=()
  ForceConnect=yes
  #Enabling DHCP stuff
  SkipForwardingDelay=yes
  IP=static
  Address=(192.168.77.1/24)
  EOF
  sudo mv piratebox_bridge /etc/netctl/
  sudo netctl enable piratebox_bridge
  sudo netctl start piratebox_bridge

===== Reconfigure PirateBox =====

  sudo sed -i -e 's|DO_IFCONFIG="yes"|DO_IFCONFIG="no"|' \
      -e 's|DO_BRIDGE="no"|DO_BRIDGE="yes"|' \
      -e 's|DNSMASQ_INTERFACE="wlan0"|DNSMASQ_INTERFACE="br-lan"|' \
      /opt/piratebox/conf/piratebox.conf

Edit piratebox.service file for system dependencies

  sudo nano /etc/systemd/system/piratebox.service

The top of the file needs to look like this:

  [Unit]
  Description=PirateBox Service
  PartOf=netctl@piratebox_bridge.service

===== IPv6 Setup =====
Let's start with fixes on PirateBox 1.1.3

    sudo sed -i -e 's| radvd|/usr/bin/radvd|g' /opt/piratebox/init.d/piratebox_alt

Do the following commands.. 

  PREFIX="fdc0:ffea"
  FIXED=$(hexdump -n8 -e '/2 ":%03x" ' /dev/random )
  V6_GEN_RESULT="$PREFIX:$FIXED"
  prefix=`</dev/urandom tr -dc a-zA-Z1-9 | head -c8`
  work_hostname="$prefix.piratebox.lan"
  sudo touch /opt/piratebox/conf/node.conf
  sudo sed -i -e "s|NODE_CONFIG_ACTIVE='no'|NODE_CONFIG_ACTIVE='yes'|" /opt/piratebox/conf/node.conf
  sudo sed -i -e "s|NODE_IPV6_IP=''|NODE_IPV6_IP='$V6_GEN_RESULT'|" \
      -e "s|NODE_NAME=''|NODE_NAME='$prefix'|" \
      /opt/piratebox/conf/node.conf
  sudo sed -i -e 's|IPV6_ENABLE="no"|IPV6_ENABLE="yes"|' \
              -e "s|fdc0:ffea::1|$V6_GEN_RESULT|" \
              /opt/piratebox/conf/ipv6.conf
  echo "IP6=static
  Address6=($V6_GEN_RESULT/64)" > ipv6.netctl 
  sudo sh -c 'cat ipv6.netctl >> /etc/netctl/piratebox_bridge'
  echo "
  OK.
  Please note the following infos:
     Generated node name: $work_hostname
     Generated IPv6: $V6_GEN_RESULT
     Prefix: /64
  "

===== Mesh config script =====
This step assumes, that you have a working network connection and the wifi adapter for mesh is the 2nd (phy1).

  sudo sh -c 'echo "br_netfilter" > /etc/modules-load.d/netfilter.conf'
  sudo modprobe br_netfilter
  sudo pacman -Sy --noconfirm batctl
  wget https://github.com/PirateBox-Dev/PirateBox-Mesh/releases/download/1.1.4/piratebox-mesh_1.1.4_all_NON_WRT.sh
  chmod a+x piratebox-mesh_1.1.4_all_NON_WRT.sh
  sudo mv piratebox-mesh_1.1.4_all_NON_WRT.sh /bin/piratebox-mesh.sh
  sudo sed -i -e 's|phy0|phy1|g'  \
     -e 's|MESH_CHANNEL=0|MESH_CHANNEL=6|' \
     -e 's|EXCHANGE_MAC="yes"|EXCHANGE_MAC="no"|' \
     /bin/piratebox-mesh.sh
  
Create a start/stop script:

  cat <<EOF > ~/mesh.service
  [Unit]
  Description=PirateBox Mesh Service
  PartOf=netctl@piratebox_bridge.service 
  
  [Service]
  Type=idle
  RemainAfterExit=yes
  ExecStart=/bin/piratebox-mesh.sh start 
  ExecStop=/bin/piratebox-mesh.sh stop
  
  [Install]
  WantedBy=multi-user.target
  EOF
  sudo mv ~/mesh.service /etc/systemd/system
  sudo systemctl daemon-reload
  sudo systemctl start mesh.service 
  sudo systemctl enable mesh.service 

===== AVAHI =====

  sudo mv /etc/avahi /etc/avahi.old
  sudo ln -s /opt/piratebox/conf/avahi/ /etc/avahi
  sudo systemctl start avahi-daemon
  sudo systemctl enable  avahi-daemon
  
===== Finalize =====
At the end you should do a reboot

  sudo reboot