data: Add and install P2P-WiFi-Display firewalld zone

This can be disabled by setting a meson option, which is e.g. sensible
when building a Flatpak or on distributions that do not support
firewalld.

See: #134

Author: Benjamin Berg

Diff for: data/P2P-WiFi-Display.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<zone target="ACCEPT">
+  <short>GNOME Network Displays WiFi-Display</short>
+  <description>A zone intended to be used by GNOME Network Displays when establishing P2P connections to Wi-Fi Display (Miracast) sinks.</description>
+  <service name="dhcp"/>
+  <service name="dns"/>
+  <port port="7236" protocol="tcp"/>
+  <protocol value="icmp"/>
+  <protocol value="ipv6-icmp"/>
+  <rule priority="32767">
+    <reject/>
+  </rule>
+</zone>
+

Diff for: data/meson.build

@@ -41,3 +41,10 @@ if compile_schemas.found()
     args: ['--strict', '--dry-run', meson.current_source_dir()]
   )
 endif
+
+if enable_firewalld_zone
+  install_data(
+    'P2P-WiFi-Display.xml',
+    install_dir: join_paths(get_option('prefix'), 'lib', 'firewalld', 'zones')
+  )
+endif

Diff for: meson.build

@@ -21,6 +21,9 @@ add_project_arguments([
   '-I' + meson.build_root(),
 ], language: 'c')
 
+enable_firewalld_zone = get_option('firewalld_zone')
+
+
 subdir('data')
 subdir('src')
 subdir('po')

Diff for: meson_options.txt

@@ -0,0 +1 @@
+option('firewalld_zone', type: 'boolean', value: true, description: 'Install firewalld zones')