path: root/inventory/group_vars/accesspoints/vars.yml

---
accesspoint_wired_interface: eth0
accesspoint_wireless_device_paths:
  2g4: "platform/qca956x_wmac"
  5g: "pci0000:00/0000:00:00.0"

accesspoint_wireless_frequencies:
  - 2g4
  - 5g


accesspoint_network_base: "{{ accesspoint_network_base_yaml | from_yaml }}"
accesspoint_network_base_yaml: |
  - name: globals 'globals'
    options:
      ula_prefix: "fc{{ '%02x:%04x:%04x' | format((255 | random(seed=inventory_hostname + '0')), (65535 | random(seed=inventory_hostname + '1')), (65535 | random(seed=inventory_hostname + '2'))) }}::/48"

  - name: interface 'loopback'
    options:
      device: lo
      proto: static
      ipaddr: 127.0.0.1
      netmask: 255.0.0.0

  {% if 'vlan' in network_mgmt_zone %}
  - name: device
    options:
      type: 8021q
      ifname: "{{ accesspoint_wired_interface }}"
      vid: {{ network_mgmt_zone.vlan }}
      name: "{{ accesspoint_wired_interface }}.{{ network_mgmt_zone.vlan }}"

  {% endif %}
  - name: interface 'mgmt'
    options:
      device: "{{ accesspoint_wired_interface }}{% if 'vlan' in network_mgmt_zone %}.{{ network_mgmt_zone.vlan }}{% endif %}"
      accept_ra: 0
      proto: static
      ipaddr: "{{ network_mgmt_zone.prefix | ipaddr(network_mgmt_zone.offsets[inventory_hostname]) | ipaddr('address') }}"
      netmask: "{{ network_mgmt_zone.prefix | ipaddr('netmask') }}"


accesspoint_network_zones: "{{ accesspoint_network_zones_yaml | from_yaml }}"
accesspoint_network_zones_yaml: |
  {% for zone_name in accesspoint_zones.keys() %}
  - name: device
    options:
      type: 8021q
      ifname: "{{ accesspoint_wired_interface }}"
      vid: {{ network_zones[zone_name].vlan }}
      name: "{{ accesspoint_wired_interface }}.{{ network_zones[zone_name].vlan }}"

  - name: device
    options:
      type: bridge
      name: "br-{{ zone_name }}"
      ports:
      - "{{ accesspoint_wired_interface }}.{{ network_zones[zone_name].vlan }}"

  - name: "interface '{{ zone_name }}'"
    options:
      device: "br-{{ zone_name }}"
      accept_ra: 0
      proto: none
  {% endfor %}



accesspoint_wireless_devices:
  - name: wifi-device 'radio5g'
    options:
      type: 'mac80211'
      channel: "{{ accesspoint_wifi_channels['5g'][inventory_hostname] }}"
      hwmode: '11a'
      country: AT
      path: "{{ accesspoint_wireless_device_paths['5g'] }}"
      htmode: 'VHT80'
      cell_density: '0'

  - name: wifi-device 'radio2g4'
    options:
      type: 'mac80211'
      channel: "{{ accesspoint_wifi_channels['2g4'][inventory_hostname] }}"
      hwmode: '11g'
      country: AT
      path: "{{ accesspoint_wireless_device_paths['2g4'] }}"
      htmode: 'HT20'
      cell_density: '0'


## TODO: set up 802.11r see:
##        * https://www.reddit.com/r/openwrt/comments/515oea/finally_got_80211r_roaming_working/
##        * https://gist.github.com/lg/998d3e908d547bd9972a6bb604df377b
accesspoint_wireless_ifaces: "{{ accesspoint_wireless_ifaces_yaml | from_yaml }}"
accesspoint_wireless_ifaces_yaml: |
  {% for zone in accesspoint_zones.keys() %}
  {%   for freq in accesspoint_wireless_frequencies %}
  - name: wifi-iface '{{ zone }}{{ freq }}'
    options:
      device: 'radio{{ freq }}'
      network: '{{ zone }}'
      mode: 'ap'
      disassoc_low_ack: '1'
      rsn_preauth: '1'
      ssid: '{{ accesspoint_zones[zone].ssid }}'
      encryption: '{{ accesspoint_zones[zone].encryption }}'
      key: '{{ accesspoint_zones[zone].key }}'
  {%   endfor %}
  {% endfor %}



install_playbook: openwrt

openwrt_variant: openwrt
openwrt_release: 21.02.0
openwrt_arch: ath79
openwrt_target: generic
openwrt_profile: ubnt_unifiac-lite
openwrt_output_image_suffixes:
  - "{{ openwrt_target }}-{{ openwrt_profile }}-squashfs-sysupgrade.bin"

openwrt_packages_remove:
  - ppp
  - ppp-mod-pppoe
  - dnsmasq
  - firewall
  - odhcpd
  - odhcpd-ipv6only
openwrt_packages_add:
  - haveged
  - htop
  - ip
  - less
  - nano
  - tcpdump-mini
  - horst
  - prometheus-node-exporter-lua
  - prometheus-node-exporter-lua-nat_traffic
  - prometheus-node-exporter-lua-netstat
  - prometheus-node-exporter-lua-openwrt
  ## we will install a custom version of these collectors, see below
  #- prometheus-node-exporter-lua-wifi
  #- prometheus-node-exporter-lua-wifi_stations
  ## manually install dependencies for wifi-collectors
  - libiwinfo-lua
  - libubus-lua

openwrt_mixin:
  /etc/sysctl.conf:
    content: |
      # Defaults are configured in /etc/sysctl.d/* and can be customized in this file
      #
      # disable IP forwarding, we don't need it since we are
      # only an AP that bridges VLANs to Wifi SSIDs
      net.ipv4.conf.default.forwarding=0
      net.ipv4.conf.all.forwarding=0
      net.ipv4.ip_forward=0
      net.ipv6.conf.default.forwarding=0
      net.ipv6.conf.all.forwarding=0

  /etc/dropbear/authorized_keys:
    content: "{{ ssh_keys_root | join('\n') }}\n"

  /etc/htoprc:
    file: "{{ global_files_dir }}/common/htoprc"

  /etc/rc.d/S22network-fw:
    link: "../init.d/network-fw"

  /etc/rc.d/K91network-fw:
    link: "../init.d/network-fw"

  /etc/init.d/network-fw:
    mode: "0755"
    content: |
      #!/bin/sh /etc/rc.common

      START=22
      STOP=91

      MGMT_IF=$(uci get network.mgmt.device)
      MGMT_IPADDR=$(uci get network.mgmt.ipaddr)
      MGMT_NETMASK=$(uci get network.mgmt.netmask)

      start() {
        iptables -A INPUT -i lo -j ACCEPT
        iptables -A INPUT -i "$MGMT_IF" -d "$MGMT_IPADDR" -s "$MGMT_IPADDR/$MGMT_NETMASK" -j ACCEPT
        iptables -P INPUT DROP
        iptables -P FORWARD DROP
      }

      stop() {
        iptables -P INPUT ACCEPT
        iptables -F INPUT
        iptables -P FORWARD ACCEPT
      }

  /usr/lib/lua/prometheus-collectors/wifi.lua:
    mode: "0755"
    content: |
      -- This is a custom version of the upstream wifi and wifi_stations collectors. We want
      -- to know the number of stations connected but for privacy and metric cardinality
      -- reasons we don't care for MAC addresses and other details of all connected stations.

      local ubus = require "ubus"
      local iwinfo = require "iwinfo"

      local function scrape()
        local metric_wifi_network_quality = metric("wifi_network_quality","gauge")
        local metric_wifi_network_bitrate = metric("wifi_network_bitrate","gauge")
        local metric_wifi_network_noise = metric("wifi_network_noise_dbm","gauge")
        local metric_wifi_network_signal = metric("wifi_network_signal_dbm","gauge")
        local metric_wifi_stations = metric("wifi_stations", "gauge")

        local u = ubus.connect()
        local status = u:call("network.wireless", "status", {})

        for dev, dev_table in pairs(status) do
          for _, intf in ipairs(dev_table['interfaces']) do
            local ifname = intf['ifname']
            if ifname ~= nil then
              local iw = iwinfo[iwinfo.type(ifname)]
              local labels = {
                channel = iw.channel(ifname),
                ssid = iw.ssid(ifname),
                bssid = iw.bssid(ifname),
                mode = iw.mode(ifname),
                ifname = ifname,
                country = iw.country(ifname),
                frequency = iw.frequency(ifname),
                device = dev,
              }

              local qc = iw.quality(ifname) or 0
              local qm = iw.quality_max(ifname) or 0
              local quality = 0
              if qc > 0 and qm > 0 then
                quality = math.floor((100 / qm) * qc)
              end
              local stations = 0
              local assoclist = iw.assoclist(ifname)
              for _, _ in pairs(assoclist) do
                 stations = stations + 1
              end

              metric_wifi_network_quality(labels, quality)
              metric_wifi_network_noise(labels, iw.noise(ifname) or 0)
              metric_wifi_network_bitrate(labels, iw.bitrate(ifname) or 0)
              metric_wifi_network_signal(labels, iw.signal(ifname) or -255)
              metric_wifi_stations(labels, stations)
            end
          end
        end
      end

      return { scrape = scrape }

  /usr/bin/list-stations:
    mode: "0755"
    content: |
      #!/bin/sh

      interfaces=$(iw dev  | grep "Interface " | cut -d ' ' -f2 | sort)

      for interface in $interfaces; do
        bssid=$(iw $interface info | grep "addr " | cut -d ' ' -f2)
        essid=$(iw $interface info | grep "ssid " | cut -d ' ' -f2-)
        channel=$(iw $interface info | grep "channel " | cut -d ' ' -f2-)
        echo "$interface ($bssid, ssid: '$essid', channel: $channel)"
        iw $interface station dump | grep "^Station" | awk '{ print(" - "$2) }'
        echo ""
      done

      exit 0


openwrt_uci:
  system:
    - name: system
      options:
        hostname: '{{ inventory_hostname }}'
        timezone: 'CET-1CEST,M3.5.0,M10.5.0/3'
        ttylogin: '0'
        log_size: '64'
        urandom_seed: '0'

    - name: timeserver 'ntp'
      options:
        enabled: '0'
        enable_server: '0'
        server:
          - '0.lede.pool.ntp.org'
          - '1.lede.pool.ntp.org'
          - '2.lede.pool.ntp.org'
          - '3.lede.pool.ntp.org'

    - name: led
      options:
        sysfs: blue:dome
        trigger: none

    - name: led
      options:
        sysfs: white:dome
        trigger: default-on
        default: 0

  dropbear:
    - name: dropbear
      options:
        PasswordAuth: 'off'
        RootPasswordAuth: 'off'
        Port: '{{ ansible_port }}'

  prometheus-node-exporter-lua:
    - name: prometheus-node-exporter-lua 'main'
      options:
        listen_interface: 'mgmt'
        listen_ipv6: '0'
        listen_port: '9100'

  network: "{{ accesspoint_network_base + accesspoint_network_zones }}"
  wireless: "{{ accesspoint_wireless_devices + accesspoint_wireless_ifaces }}"