78 lines
1.8 KiB
Bash
Executable File
78 lines
1.8 KiB
Bash
Executable File
#!/bin/bash
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#
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# Run the OpenVPN server normally
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#
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if [ "$DEBUG" == "1" ]; then
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set -x
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fi
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set -e
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cd $OPENVPN
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# Build runtime arguments array based on environment
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USER_ARGS=("${@}")
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ARGS=()
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IPTABLES="iptables-nft"
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# Checks if ARGS already contains the given value
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function hasArg {
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local element
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for element in "${@:2}"; do
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[ "${element}" == "${1}" ] && return 0
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done
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return 1
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}
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# Adds the given argument if it's not already specified.
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function addArg {
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local arg="${1}"
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[ $# -ge 1 ] && local val="${2}"
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if ! hasArg "${arg}" "${USER_ARGS[@]}"; then
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ARGS+=("${arg}")
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[ $# -ge 1 ] && ARGS+=("${val}")
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fi
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}
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# set up iptables rules and routing
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# this allows rules/routing to be altered by supplying this function
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function setupIptablesAndRouting {
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$IPTABLES -t nat -C POSTROUTING -s $VPN_CIDR_RANGE -o $OVPN_NATDEVICE -j MASQUERADE 2>/dev/null || {
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$IPTABLES -t nat -A POSTROUTING -s $VPN_CIDR_RANGE -o $OVPN_NATDEVICE -j MASQUERADE
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}
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for i in "${OVPN_ROUTES[@]}"; do
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$IPTABLES -t nat -C POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE 2>/dev/null || {
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$IPTABLES -t nat -A POSTROUTING -s "$i" -o $OVPN_NATDEVICE -j MASQUERADE
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}
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done
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}
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addArg "--config" "$OPENVPN/openvpn.conf"
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VPN_CIDR_RANGE="172.16.10.0/24"
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# When using --net=host, use this to specify nat device.
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OVPN_NATDEVICE=eth0
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mkdir -p /dev/net
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if [ ! -c /dev/net/tun ]; then
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mknod /dev/net/tun c 10 200
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fi
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if [ -d "$OPENVPN/ccd" ]; then
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addArg "--client-config-dir" "$OPENVPN/ccd"
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fi
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# Setup NAT forwarding if requested
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setupIptablesAndRouting
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echo "Starting openvpn_exporter"
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openvpn_exporter --openvpn.status_paths /var/run/openvpn-status.log &
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echo "Running 'openvpn ${ARGS[@]} ${USER_ARGS[@]}'"
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exec openvpn ${ARGS[@]} ${USER_ARGS[@]}
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