iiab/roles/network/tasks/hostapd.yml

- name: Turn off hostapd when no wifi interface present or in "Appliance Mode"
  set_fact:
    hostapd_enabled: False
  when: iiab_wireless_lan_iface is undefined or iiab_network_mode == "Appliance"

- name: Detect current Wifi channel
  shell: iw {{ discovered_wireless_iface }} info | grep channel | cut -d' ' -f2
  register: current_host_channel
  when: discovered_wireless_iface != "none"

- name: Setting WiFi channel to {{ current_host_channel.stdout }} on RPi hardware
  set_fact:
    host_channel: "{{ current_host_channel.stdout }}"
  when: current_host_channel.stdout is defined and current_host_channel.stdout != "" and current_host_channel.stdout|int <= 13 and discovered_wireless_iface != "none" and rpi_model != "none"

- name: Create /etc/hostapd/hostapd.conf from template
  template:
    src: hostapd/hostapd.conf.j2
    dest: /etc/hostapd/hostapd.conf
    owner: root
    group: root
    mode: 0644
  when: discovered_wireless_iface != "none"

- name: Create backup /etc/hostapd/hostapd.conf.iiab from template
  template:
    src: hostapd/hostapd.conf.j2
    dest: /etc/hostapd/hostapd.conf.iiab
    owner: root
    group: root
    mode: 0644
  when: discovered_wireless_iface != "none"

- name: Generate new random mac address for ap0
  shell: tr -dc A-F0-9 < /dev/urandom | head -c 10 | sed -r 's/(..)/\1:/g;s/:$//;s/^/02:/'
  register: ap0_mac

- name: Setting ap0 mac address for use in hostapd service file
  set_fact:
    ap0_mac_addr: "{{ ap0_mac.stdout }}"

- name: Use custom 'hostapd' systemd service unit file using ap0 when wifi_up_down
  template:
    src: hostapd/hostapd.service.j2
    dest: /etc/systemd/system/hostapd.service
    owner: root
    group: root
    mode: 0644
  when: discovered_wireless_iface != "none" and wifi_up_down

- name: Use custom 'hostapd' systemd service unit file for {{ discovered_wireless_iface }} when not wifi_up_down
  template:
    src: hostapd/hostapd.legacy.j2
    dest: /etc/systemd/system/hostapd.service
    owner: root
    group: root
    mode: 0644
  when: discovered_wireless_iface != "none" and not wifi_up_down

- name: Create /usr/bin/iiab-hotspot-on from template
  template:
    src: network/iiab-hotspot-on
    dest: /usr/bin/iiab-hotspot-on
    owner: root
    group: root
    mode: 0755

- name: Create /usr/bin/iiab-hotspot-off from template
  template:
    src: network/iiab-hotspot-off
    dest: /usr/bin/iiab-hotspot-off
    owner: root
    group: root
    mode: 0755

- name: Create dhcpcd hook for hostapd
  template:
    src: hostapd/50-hostapd
    dest: /lib/dhcpcd/dhcpcd-hooks/50-hostapd
    owner: root
    group: root
    mode: 0644
  when: is_raspbian and wifi_up_down

- name: Remove dhcpcd hook for hostapd if WiFi is not split
  file:
    path: /lib/dhcpcd/dhcpcd-hooks/50-hostapd
    state: absent
  when: is_raspbian and not wifi_up_down

- name: Create networkd-dispatcher diagnosic hook for recording network events
  template:
    owner: root
    group: root
    mode: 0755
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
  with_items:
    - { src: 'hostapd/00-iiab-debug', dest: '/etc/networkd-dispatcher/carrier.d/00-iiab-debug' }
    - { src: 'hostapd/00-iiab-debug', dest: '/etc/networkd-dispatcher/degraded.d/00-iiab-debug' }
    - { src: 'hostapd/00-iiab-debug', dest: '/etc/networkd-dispatcher/dormant.d/00-iiab-debug' }
    - { src: 'hostapd/00-iiab-debug', dest: '/etc/networkd-dispatcher/no-carrier.d/00-iiab-debug' }
    - { src: 'hostapd/00-iiab-debug', dest: '/etc/networkd-dispatcher/off.d/00-iiab-debug' }
    - { src: 'hostapd/00-iiab-debug', dest: '/etc/networkd-dispatcher/routable.d/00-iiab-debug' }
  when: systemd_networkd_active and discovered_wireless_iface != "none"

- name: Create networkd-dispatcher hook for hostapd on RPi hardware
  template:
    owner: root
    group: root
    mode: 0755
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
  with_items:
    - { src: 'hostapd/netd-disp', dest: '/etc/networkd-dispatcher/carrier.d/iiab-wifi' }
    - { src: 'hostapd/netd-disp', dest: '/etc/networkd-dispatcher/no-carrier.d/iiab-wifi' }
  when: systemd_networkd_active and discovered_wireless_iface != "none" and rpi_model != "none" and wifi_up_down

- name: Remove networkd-dispatcher hook for hostapd on RPi hardware and not up/down
  file: 
    path: "{{ item.dest}}"
    status: absent
  with_items:
    - { dest: '/etc/networkd-dispatcher/carrier.d/iiab-wifi' }
    - { dest: '/etc/networkd-dispatcher/no-carrier.d/iiab-wifi' }
  when: systemd_networkd_active and discovered_wireless_iface != "none" and rpi_model != "none" and not wifi_up_down

- name: Disable the Access Point 'hostapd' service
  systemd:
    name: hostapd
    enabled: no
# cheap workaround for when /etc/init.d is populated
#  when: not hostapd_enabled

- name: Enable the Access Point 'hostapd' service
  systemd:
    name: hostapd
    enabled: yes
  when: hostapd_enabled

- name: Record HOSTAPD_ENABLED to {{ iiab_env_file }}
  lineinfile:
    path: "{{ iiab_env_file }}"
    regexp: '^HOSTAPD_ENABLED=*'
    line: 'HOSTAPD_ENABLED={{ hostapd_enabled }}'
    state: present