Add a connection type for WireGuard interfaces

Contributed by Thibaut Sautereau <thibaut@sautereau.fr>

contrib/PKGBUILD.in

@@ -16,6 +16,7 @@ optdepends=('dialog: for the menu based wifi assistant'
             'ifplugd: for automatic wired connections through netctl-ifplugd'
             'ppp: for PPP connections'
             'openvswitch: for Open vSwitch connections'
+            'wireguard-tools: for WireGuard connections'
            )
 install=netctl.install
 source=(https://sources.archlinux.org/other/packages/netctl/netctl-${pkgver}.tar.xz{,.sig})

docs/examples/wireguard

+Description="Example WireGuard tunnel connection"
+Interface=wg0
+Connection=wireguard
+WGConfigFile=/etc/wireguard/wg0.conf
+
+## Example IP configuration
+IP=static
+Address=('10.0.0.2/24')
+
+IP6=static
+Address6=('fd00::2/120')

docs/netctl.profile.5.txt

@@ -62,6 +62,8 @@ AVAILABLE CONNECTION TYPES
     For VLANs on ethernet-like connections.
 +macvlan+::
     For MACVLANs on ethernet-like connections.
++wireguard+::
+	For WireGuard interfaces.
 
 
 GENERAL OPTIONS
@@ -551,6 +553,17 @@ following are understood for connections of the `macvlan' type:
     details.
 
 
+OPTIONS FOR `wireguard' CONNECTIONS
+-----------------------------------
+The name of the WireGuard interface is specified in 'Interface='. Next
+to the *ip options*, the following are understood for connections of
+the `wireguard' type:
+
+'WGConfigFile='::
+    Path to a *WireGuard* configuration file. Defaults to
+    '/etc/wireguard/$Interface.conf'.
+
+
 SPECIAL QUOTING RULES
 ---------------------
 Configuration files for *wpa_supplicant* use non-standard quoting.

src/lib/connections/wireguard

+# Contributed by: Thibaut Sautereau <thibaut@sautereau.fr>
+
+. "$SUBR_DIR/ip"
+
+wireguard_up() {
+    if is_interface "$Interface"; then
+        report_error "Interface '$Interface' already exists"
+        return 1
+    fi
+
+    if ! interface_add wireguard "$Interface" "$MACAddress"; then
+        report_error "Your kernel may not support WireGuard."
+        return 1
+    fi
+
+    wg setconf "$Interface" "${WGConfigFile:-/etc/wireguard/$Interface.conf}"
+    bring_interface_up "$Interface"
+    ip_set
+}
+
+wireguard_down() {
+    ip_unset
+    interface_delete "$Interface"
+}
+
+# vim: ft=sh ts=4 et sw=4: