Add PreUp/PostUp/PreDown/PostDown to env variables for server.conf cr…

…eation

README.md

@@ -133,7 +133,10 @@ $ subspace --http-host subspace.example.com
 | `SUBSPACE_THEME`            | `green`             | The theme to use, please refer to [semantic-ui](https://semantic-ui.com/usage/theming.html) for accepted colors                                      |
 | `SUBSPACE_BACKLINK`         | `/`                 | The page to set the home button to                                                                                                                   |
 | `SUBSPACE_DISABLE_DNS`      | `false`             | Whether to disable DNS so the client uses their own configured DNS server(s). Consider disabling DNS server, if supporting international VPN clients |
-
+| `SUBSPACE_PREUP`           | null             | PreUp=Action for wireguard server interface |
+| `SUBSPACE_PREDOWN`          | null             | PreDown=Action for wireguard server interface |
+| `SUBSPACE_POSTUP`           | null             | PostUp=Action for wireguard server interface |
+| `SUBSPACE_POSTDOWN`         | null             | PostDown=Action for wireguard server interface |
 ### Run as a Docker container
 
 #### Install WireGuard on the host

entrypoint.sh

@@ -164,6 +164,24 @@ PrivateKey = $(cat /data/wireguard/server.private)
 ListenPort = ${SUBSPACE_LISTENPORT}
 
 WGSERVER
+
+if [ -n $SUBSPACE_PREUP ];
+then
+  echo "PreUp=$SUBSPACE_PREUP" >> /data/wireguard/server.conf
+fi
+if [ -n $SUBSPACE_PREDOWN ];
+then
+  echo "PreDown=$SUBSPACE_PREDOWN" >> /data/wireguard/server.conf
+fi
+if [ -n $SUBSPACE_POSTUP ];
+then
+  echo "PostUp=$SUBSPACE_POSTUP" >> /data/wireguard/server.conf
+fi
+if [ -n $SUBSPACE_POSTDOWN ];
+then
+  echo "PostDown=$SUBSPACE_POSTDOWN" >> /data/wireguard/server.conf
+fi
+
 cat /data/wireguard/peers/*.conf >>/data/wireguard/server.conf
 umask ${umask_val}
 [ -f /data/config.json ] && chmod 600 /data/config.json # Special handling of file not created by start-up script