make route and dns push optional

diff --git a/vpn-server-setup b/vpn-server-setup
index 4dcb2158c721f709dff01a5bc977e515e8a31f0a..c901970ce613346cd54bfdd984b0dce4f0043821 100755 (executable)
--- a/vpn-server-setup
+++ b/vpn-server-setup
@@ -20,14 +20,15 @@ trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 [[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"
 
 dns=true
+route=true
 case $1 in
-    -d)
-        dns=false
-        ;;
+    -r) route=false ;;
+    -d) dns=false ;;
     -h|--help|*)
         cat <<'EOF'
 usage: ${0##*/} [-d|-h|--help]
 
+-r  Do not push default route
 -d  Do not push dns
 -h --help print help
 
@@ -68,44 +69,43 @@ s/^dh dh1024.pem/dh dh2048.pem/
 /^comp-lzo.*/d
 EOF
 
-teeu() {
-    while read -r line; do
-        grep -xFq "$line" "$1" || echo "$line" | tee -a "$1"
-    done
-}
 
-teeu /etc/openvpn/server.conf <<'EOF'
+cat >>/etc/openvpn/server.conf <<'EOF'
 # not in example config, but openvpn outputs a warning about insecure
 # cipher without a setting like this (the default i can understand due
 # to compatibility issues, but not changing the example config... not
 # cool). exact cipher taken from config of vpn provider I trust. This
 # requires the same setting on the client side.
 cipher aes-256-cbc
-# Be the default gateway for clients.
-push "redirect-gateway def1"
 # just sets up the ability to have client specific configs
 client-config-dir /etc/openvpn/client-config
 EOF
 mkdir -p /etc/openvpn/client-config
 
+if $route; then
+    cat >>/etc/openvpn/server.conf <<'EOF'
+# Be the default gateway for clients.
+push "redirect-gateway def1"
+EOF
+fi
 
 if $dns; then
     # Be the dns server for clients
-    teeu /etc/openvpn/server.conf <<'EOF'
+    cat >>/etc/openvpn/server.conf <<'EOF'
 push "dhcp-option DNS 10.8.0.1"
 EOF
 fi
 
 echo "1" > /proc/sys/net/ipv4/ip_forward
 sed -i --follow-symlinks '/^ *net\.ipv4\.ip_forward=.*/d' /etc/sysctl.conf
-teeu /etc/sysctl.conf <<'EOF'
+cat >>/etc/sysctl.conf <<'EOF'
 net.ipv4.ip_forward=1
 EOF
 
 
 gw=$(ip route | sed -rn 's/^default via .* dev (\S+).*/\1/p')
 
-sudo dd of=/etc/systemd/system/vpnnat.service <<EOF
+cat >/etc/systemd/system/vpnnat.service <<EOF
 [Unit]
 Description=Turns on nat iptables setting