---

# ===
# Install/Uodate git firewall repository
# ===

#- meta: end_play
#  when: 
#    - inventory_hostname in groups['gateway_server'] or inventory_hostname in groups['no_ipt_firewall'] or git_firewall_repository is not defined or git_firewall_repository|length < 1


- name: Install/update firewall repository
  git:
    repo: '{{ git_firewall_repository.repo }}'
    dest: '{{ git_firewall_repository.dest }}'
  when: git_firewall_repository is defined and git_firewall_repository|length > 0



# ===
# Some Checks
# ===

- name: Check if file '/etc/ipt-firewall/main_ipv6.conf' exists
  stat:
    path: /etc/ipt-firewall/main_ipv6.conf
  register: main_ipv6_exists

- name: Check if file '/etc/ipt-firewall/main_ipv4.conf' exists
  stat:
    path: /etc/ipt-firewall/main_ipv4.conf
  register: main_ipv4_exists

- name: Check if file '/etc/ipt-firewall/interfaces_ipv6.conf' exists
  stat:
    path: /etc/ipt-firewall/interfaces_ipv6.conf
  register: interfaces_ipv6_exists

- name: Check if file '/etc/ipt-firewall/interfaces_ipv4.conf' exists
  stat:
    path: /etc/ipt-firewall/interfaces_ipv4.conf
  register: interfaces_ipv4_exists

- name: Check if file '/etc/munin/munin-node.conf' exists
  stat:
    path: /etc/munin/munin-node.conf
  register: munin_node_exists



# ===
# Adjust/Correct some values..
# ===

- name: addjust line 'munin_remote_ip' (IPv4)
  lineinfile:
    path: /etc/ipt-firewall/main_ipv4.conf
    regexp: '^munin_remote_ip='
    line: 'munin_remote_ip="{{ munin_remote_ipv4 }}"'
  when: 
      - main_ipv4_exists.stat.exists
  notify:
    - Restart IPv4 Firewall

- name: addjust line 'munin_remote_ip' (IPv6)
  lineinfile:
    path: /etc/ipt-firewall/main_ipv6.conf
    regexp: '^munin_remote_ip='
    line: 'munin_remote_ip="{{ munin_remote_ipv6 }}"'
  when: 
      - main_ipv6_exists.stat.exists
  notify:
    - Restart IPv6 Firewall

- name: addjust line 'vpn_ifs' (IPv4)
  lineinfile:
    path: /etc/ipt-firewall/interfaces_ipv4.conf
    regexp: '^vpn_ifs='
    line: 'vpn_ifs="tun+"'
  when: 
      - interfaces_ipv4_exists.stat.exists
  notify:
    - Restart IPv4 Firewall

- name: addjust line 'vpn_ifs' (IPv6)
  lineinfile:
    path: /etc/ipt-firewall/interfaces_ipv6.conf
    regexp: '^vpn_ifs='
    line: 'vpn_ifs="tun+"'
  when: 
      - interfaces_ipv6_exists.stat.exists
  notify:
    - Restart IPv6 Firewall



# ===
# Add some Code Block.
# ===

# ---
# Add additional SMTP ports (OUT and IN)
# ---

- name: Check if String 'smtpd_additional_listen_ports=..' is present
  shell: grep -q -E "^smtpd_additional_listen_ports=" /etc/ipt-firewall/main_ipv4.conf
  register: smtpd_additional_listen_ports_ipv4_present
  when: main_ipv4_exists.stat.exists
  failed_when: "smtpd_additional_listen_ports_ipv4_present.rc > 1"
  changed_when: "smtpd_additional_listen_ports_ipv4_present.rc > 0"

- name: Adjust file '/etc/ipt-firewall/main_ipv4.conf' (smtpd_additional_listen_ports)
  blockinfile:
    path: /etc/ipt-firewall/main_ipv4.conf
    insertafter: '^#?\s*forward_smtpd_ips'
    block: |
      # Additional Ports on which SMTP Service should lsiten
      #
      # blank separated list of ports
      #
      smtpd_additional_listen_ports=""

      # Additional Ports for outgoing smtp traffic
      #
      # blank separated list of ports
      #
      smtpd_additional_outgoung_ports=""
    marker: "# Marker set by modify-ipt-server.yml (smtpd_additional_listen_ports)"
  when:
    - main_ipv4_exists.stat.exists
    - smtpd_additional_listen_ports_ipv4_present is changed
  notify:
    - Restart IPv4 Firewall


- name: Check if String 'smtpd_additional_listen_ports=..' is present
  shell: grep -q -E "^smtpd_additional_listen_ports=" /etc/ipt-firewall/main_ipv6.conf
  register: smtpd_additional_listen_ports_ipv6_present
  when: main_ipv6_exists.stat.exists
  failed_when: "smtpd_additional_listen_ports_ipv6_present.rc > 1"
  changed_when: "smtpd_additional_listen_ports_ipv6_present.rc > 0"

- name: Adjust file '/etc/ipt-firewall/main_ipv6.conf' (smtpd_additional_listen_ports)
  blockinfile:
    path: /etc/ipt-firewall/main_ipv6.conf
    insertafter: '^#?\s*forward_smtpd_ips'
    block: |
      # Additional Ports on which SMTP Service should lsiten
      #
      # blank separated list of ports
      #
      smtpd_additional_listen_ports=""

      # Additional Ports for outgoing smtp traffic
      #
      # blank separated list of ports
      #
      smtpd_additional_outgoung_ports=""
    marker: "# Marker set by modify-ipt-server.yml (smtpd_additional_listen_ports)"
  when:
    - main_ipv6_exists.stat.exists
    - smtpd_additional_listen_ports_ipv6_present is changed
  notify:
    - Restart IPv6 Firewall


# ===
# Remove Marker set by blockinfile
# ===

- name: Remove marker IPv4
  replace :
    path: /etc/ipt-firewall/main_ipv4.conf
    regexp: "^# Marker set by modify-ipt-server.yml.*$"
    replace: ""
  register: marker_ipv4_removed
  #failed_when: "marker_ipv4_removed.rc > 1"
  #changed_when: "marker_ipv4_removed.rc < 1"
  when: 
    - main_ipv4_exists.stat.exists

- name: Remove marker IPv6
  replace :
    path: /etc/ipt-firewall/main_ipv6.conf
    regexp: "^# Marker set by modify-ipt-server.yml.*$"
    replace: ""
  register: marker_ipv6_removed
  #failed_when: "marker_ipv6_removed.rc > 1"
  #changed_when: "marker_ipv6_removed.rc < 1"
  when: 
    - main_ipv6_exists.stat.exists

- name: Remove marker IPv4 from interfaces_ipv4.conf
  replace :
    path: /etc/ipt-firewall/interfaces_ipv4.conf
    regexp: "^# Marker set by modify-ipt-server.yml.*$"
    replace: ""
  when: 
    - interfaces_ipv4_exists.stat.exists

- name: Remove marker IPv6 from interfaces_ipv6.conf
  replace :
    path: /etc/ipt-firewall/interfaces_ipv6.conf
    regexp: "^# Marker set by modify-ipt-server.yml.*$"
    replace: ""
  when: 
    - interfaces_ipv6_exists.stat.exists



# ===
# Add Code Line.
# ===


# ---
# Per IP Connection Limit (add a line)
# ---

- name: Check if String 'per_IP_connection_limit=..' is present
  shell: grep -q -E "^per_IP_connection_limit=" /etc/ipt-firewall/main_ipv4.conf
  register: per_ip_connection_limit_settings_ipv4_present
  when: main_ipv4_exists.stat.exists
  failed_when: "per_ip_connection_limit_settings_ipv4_present.rc > 1"
  changed_when: "per_ip_connection_limit_settings_ipv4_present.rc > 0"

- name: Adjust file '/etc/ipt-firewall/main_ipv4.conf' (protect_settings)
  lineinfile:
    path: /etc/ipt-firewall/main_ipv4.conf
    insertafter: '^#?\s*limit_connections_per_source_IP'
    line: per_IP_connection_limit=$default_per_IP_connection_limit
  when:
    - main_ipv4_exists.stat.exists
    - per_ip_connection_limit_settings_ipv4_present is changed
  notify:
    - Restart IPv4 Firewall


- name: Check if String 'per_IP_connection_limit=..' is present
  shell: grep -q -E "^per_IP_connection_limit=" /etc/ipt-firewall/main_ipv6.conf
  register: per_ip_connection_limit_settings_ipv6_present
  when: main_ipv6_exists.stat.exists
  failed_when: "per_ip_connection_limit_settings_ipv6_present.rc > 1"
  changed_when: "per_ip_connection_limit_settings_ipv6_present.rc > 0"

- name: Adjust file '/etc/ipt-firewall/main_ipv6.conf' (protect_settings)
  lineinfile:
    dest: /etc/ipt-firewall/main_ipv6.conf
    insertafter: '^#?\s*limit_connections_per_source_IP'
    line: per_IP_connection_limit=$default_per_IP_connection_limit
  when:
    - main_ipv6_exists.stat.exists
    - per_ip_connection_limit_settings_ipv6_present is changed
  notify:
    - Restart IPv6 Firewall



# ===
# Confiuration Files
# ===

- name: Check if configuration files are latest
  shell: 'diff {{ git_firewall_repository.dest }}/conf/{{ item }} /etc/ipt-firewall/{{ item }} > /dev/null 2>&1'
  changed_when: "diff_script_output.rc > 0"
  # diff_output.rc
  #    0  -> unchanged
  #    1  -> changed
  #    2  -> not present
  failed_when: "diff_script_output.rc > 2"
  when: 
    - git_firewall_repository is defined and git_firewall_repository|length > 0
  loop:
     - default_settings.conf
     - include_functions.conf
     - load_modules_ipv4.conf
     - load_modules_ipv6.conf
     - logging_ipv4.conf
     - logging_ipv6.conf
     - post_decalrations.conf
  register: diff_script_output

- name: Ensure configuration files are latest
  command: cp {{ git_firewall_repository.dest }}/conf/{{ item }} /etc/ipt-firewall/{{ item }}
  loop:
     - default_settings.conf
     - include_functions.conf
     - load_modules_ipv4.conf
     - load_modules_ipv6.conf
     - logging_ipv4.conf
     - logging_ipv6.conf
     - post_decalrations.conf
  when:
    - git_firewall_repository is defined and git_firewall_repository|length > 0
    - diff_script_output.changed
  notify:
    - Restart IPv4 Firewall
    - Restart IPv6 Firewall



# ===
# Firewall scripts
# ===

- name: Check if firewall scripts are latest
  shell: 'diff {{ git_firewall_repository.dest }}/{{ item }} /usr/local/sbin/{{ item }} > /dev/null 2>&1'
  changed_when: "diff_script_output.rc > 0"
  # diff_output.rc
  #    0  -> unchanged
  #    1  -> changed
  #    2  -> not present
  failed_when: "diff_script_output.rc > 2"
  when: 
    - git_firewall_repository is defined and git_firewall_repository|length > 0
  loop:
     - ipt-firewall-server
     - ip6t-firewall-server
  register: diff_script_output

- name: Ensure firewall scripts are latest
  command: cp {{ git_firewall_repository.dest }}/{{ item }} /usr/local/sbin/{{ item }}
  loop:
     - ipt-firewall-server
     - ip6t-firewall-server
  when:
    - git_firewall_repository is defined and git_firewall_repository|length > 0
    - diff_script_output.changed
  notify:
    - Restart IPv4 Firewall
    - Restart IPv6 Firewall



# ===
# Delete files that are no longer required
# ===

- name: Delete file '/etc/ipt-firewall/default_ports.conf' ..
  file:
    state: absent
    path: /etc/ipt-firewall/default_ports.conf

- name: Delete file '/etc/ipt-firewall/ports.conf' ..
  file:
    state: absent
    path: /etc/ipt-firewall/ports.conf