pwnagotchi/builder/nexmon.yml

#
# Install nexmon brcmfmac firmware and drivers from source as needed
#

- name: "Check for /lib/modules/{{ item.kernel }}/build to see if we can"
  stat: path="/lib/modules/{{item.kernel}}/build"
  register: kernel_headers

- name: "Kernel {{item.kernel}} exists; installing nexmon"
  when:
    - kernel_headers.stat.exists
  block:
    - name: "Check for staged firmware {{ item.firmware }}"
      stat: path="{{ staging }}/firmware/{{ item.firmware }}"
      register: firmware

    - name: "Check for staged kernel module {{ item.kernel }}/brcmfmac.ko"
      stat: path="{{ staging }}/modules/{{ item.kernel }}/brcmfmac.ko"
      register: kmodule

    - name: Build nexmon as needed
      when:
        - not firmware.stat.exists or not kmodule.stat.exists
      block:

        - name: Check for existence of nexmon repo
          stat: path="/usr/local/src/nexmon"
          register: nexmongit

        - name: clone nexmon repository
          when: not nexmongit.stat.exists
          git:
            repo: "https://github.com/DrSchottky/nexmon.git"
            dest: /usr/local/src/nexmon
          register: nexmongit

        - name: prepare nexmon build tree
          when: nexmongit.changed
          shell: "source ./setup_env.sh && make"
          args:
            executable: /bin/bash
            chdir: /usr/local/src/nexmon/

        - name: Build firmware if needed
          when: not firmware.stat.exists
          environment:
            QEMU_UNAME: "{{ item.kernel }}"
            ARCHFLAGS: "{{ item.arch_flags }}"
          block:
            - name: "make firmware patch {{ item.patch }}"
              shell: |
                source ./setup_env.sh
                cd patches/{{ item.patch }}/nexmon/
                make clean
                make
              args:
                executable: /bin/bash
                chdir: /usr/local/src/nexmon/

            - name: make firmware staging dir
              file:
                state: directory
                path: "{{ staging }}/firmware"

            - name: 'copy firmware {{ item.firmware }} to staging directory'
              copy:
                src: '/usr/local/src/nexmon/patches/{{ item.patch }}/nexmon/{{ item.firmware }}'
                dest: '{{ staging }}/firmware/'
                follow: true

        - name: Build module as needed
          when: not kmodule.stat.exists
          environment:
            QEMU_UNAME: "{{ item.kernel }}"
            ARCHFLAGS: "{{ item.arch_flags }}"
          block:
            - name: "make brcmfmac.ko module {{ item.kernel }}"
              when: firmware.stat.exists
              # if not firmware.stat.exists, then module would have been installed above
              shell: |
                export QEMU_UNAME={{ item.kernel }}
                uname -a
                source ./setup_env.sh
                cd patches/{{ item.patch }}/nexmon/
                make clean
                make brcmfmac.ko
              args:
                executable: /bin/bash
                chdir: /usr/local/src/nexmon/
              environment:
                QEMU_UNAME: "{{ item.kernel }}"
                ARCHFLAGS: "{{ item.arch_flags }}"

            - name: make modules staging dir
              file:
                state: directory
                path: "{{ staging }}/modules/{{ item.kernel }}"

            - name: copy modified driver to staging
              copy:
                src: "/usr/local/src/nexmon/patches/driver/brcmfmac_{{ kernel.min }}.y-nexmon/brcmfmac.ko"
                dest: "{{ staging }}/modules/{{ item.kernel }}/brcmfmac.ko"
                follow: true
              register: brcmfmac_installed
    # end of nexmon build block. products should now be in staging if they were not already

    # check again, just to be sure
    - name: "Check for staged firmware {{ item.firmware }}"
      stat: path="{{ staging }}/firmware/{{ item.firmware }}"
      register: firmware

    # install nexmon firmware from staging directory
    - name: 'install nexmon firmware {{ item.firmware }}'
      when: firmware.stat.exists
      block:
        - name: "Install nexmon firware in /usr/lib/firmware/brcm"
          copy:
            src: '{{ staging }}/firmware/{{ item.firmware }}'
            dest: '/usr/lib/firmware/brcm/{{ item.firmware }}'
            follow: true

    - name: "Check for staged kernel module {{ item.kernel }}/brcmfmac.ko"
      stat: path="{{ staging }}/modules/{{ item.kernel }}/brcmfmac.ko"
      register: kmodule

    - name: "Install kernel module {{ item.kernel }}/brcmfmac.ko from staging"
      when: kmodule.stat.exists
      block:
        # remove originals, and keep track
        - name: "Remove old compressed kernel module (if there)"
          file:
            state: absent
            path: "/usr/lib/modules/{{ item.kernel }}/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko.xz"
          register: brcmfmac_ko_xz
          ignore_errors: true

        - name: "Remove old uncompressed kernel module (if there)"
          file:
            state: absent
            path: "/usr/lib/modules/{{ item.kernel }}/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko"
          register: brcmfmac_ko
          ignore_errors: true

        - name: "install nexmon kernel driver {{item.kernel}}"
          copy:
            src: "{{ staging }}/modules/{{ item.kernel }}/brcmfmac.ko"
            dest: "/usr/lib/modules/{{ item.kernel }}/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko"
            follow: true
          register: brcmfmac_installed

    - name: "xz compress driver: {{brcmfmac_ko_xz.changed}}"
      when: brcmfmac_ko_xz.changed
      command: xz -k brcmfmac.ko
      args:
        chdir: '/usr/lib/modules/{{ item.kernel }}/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac'

    - name: "remove uncompressed driver: {{brcmfmac_ko.changed}}"
      when: not brcmfmac_ko.changed
      file:
        state: absent
        path: "/usr/lib/modules/{{ item.kernel }}/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko"

    - name: update module dependencies
      command: "/sbin/depmod -a {{ item.kernel }}"