contrib/systemd: add systemd-networkd examples from manuals
Change-Id: I265637f39dd16dd43992f33149e512e34ed83252
diff --git a/contrib/systemd/Makefile.am b/contrib/systemd/Makefile.am
index fbb553f..cbf0a97 100644
--- a/contrib/systemd/Makefile.am
+++ b/contrib/systemd/Makefile.am
@@ -1,4 +1,8 @@
-EXTRA_DIST = osmo-ggsn.service
+EXTRA_DIST = \
+ osmo-ggsn.service \
+ ggsn.network \
+ apn0.netdev \
+ $(NULL)
if HAVE_SYSTEMD
systemdsystemunit_DATA = \
diff --git a/contrib/systemd/apn0.netdev b/contrib/systemd/apn0.netdev
new file mode 100644
index 0000000..b8db5e1
--- /dev/null
+++ b/contrib/systemd/apn0.netdev
@@ -0,0 +1,7 @@
+[NetDev]
+Name=apn0
+Kind=tun
+
+[Tun]
+User=username
+Group=username
diff --git a/contrib/systemd/ggsn.network b/contrib/systemd/ggsn.network
new file mode 100644
index 0000000..f1694fa
--- /dev/null
+++ b/contrib/systemd/ggsn.network
@@ -0,0 +1,6 @@
+[Match]
+Name=apn0
+
+[Network]
+Address=192.168.7.1/24
+IPMasquerade=yes