add test for iptables rules customization functionality

test/tests/iptables/run.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+set -e
+
+[ -n "${DEBUG+x}" ] && set -x
+OVPN_DATA=basic-data
+IMG="kylemanna/openvpn"
+NAME="ovpn-test"
+SERV_IP=$(ip -4 -o addr show scope global  | awk '{print $4}' | sed -e 's:/.*::' | head -n1)
+
+# generate server config including iptables nat-ing
+docker volume create --name $OVPN_DATA
+docker run --rm -v $OVPN_DATA:/etc/openvpn $IMG ovpn_genconfig -u udp://$SERV_IP -N
+docker run -v $OVPN_DATA:/etc/openvpn --rm -it -e "EASYRSA_BATCH=1" -e "EASYRSA_REQ_CN=Travis-CI Test CA" $IMG ovpn_initpki nopass
+
+# Fire up the server
+docker run -d --name $NAME -v $OVPN_DATA:/etc/openvpn --cap-add=NET_ADMIN $IMG
+
+# check default iptables rules
+docker exec -ti $NAME bash -c 'source /etc/openvpn/ovpn_env.sh; eval iptables -t nat -C POSTROUTING -s $OVPN_SERVER -o eth0 -j MASQUERADE'
+
+# append new setupIptablesAndRouting function to config
+docker exec -ti $NAME bash -c 'echo function setupIptablesAndRouting { iptables -t nat -A POSTROUTING -m comment --comment "test"\;} >> /etc/openvpn/ovpn_env.sh'
+
+# kill server in preparation to modify config
+docker kill $NAME
+docker rm $NAME
+
+# check that overridden function exists and that test iptables rules is active
+docker run -d --name $NAME -v $OVPN_DATA:/etc/openvpn --cap-add=NET_ADMIN $IMG
+docker exec -ti $NAME bash -c 'source /etc/openvpn/ovpn_env.sh; type -t setupIptablesAndRouting && iptables -t nat -C POSTROUTING -m comment --comment "test"'
+
+#
+# kill server
+#
+
+docker kill $NAME
+docker rm $NAME
+docker volume rm $OVPN_DATA