61 lines
1.3 KiB
Bash
61 lines
1.3 KiB
Bash
#!/usr/bin/env bash
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set -o pipefail
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change_hostname() {
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echo VPNDOCKER > /etc/hostname
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}
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create_net_dev() {
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mkdir -p /dev/net
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mknod /dev/net/tun c 10 200
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chmod 600 /dev/net/tun
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}
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connect_vpn() {
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sed -e 's|^up .*$|up /etc/openvpn/up.sh|' \
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-e 's|^down .*$|down /etc/openvpn/down.sh|' \
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-e 's|^auth-user-pass.*$|auth-user-pass|' \
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"$OVPN_CONFIGURATION_FILE" > /tmp/ovpn.conf
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openvpn --config /tmp/ovpn.conf --daemon
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}
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get_ip() {
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nsout="$(nslookup -timeout=1 myip.opendns.com resolver1.opendns.com)"
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if [ "$?" != 0 ]; then
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echo "WARN: Failed to run nslookup" >&2
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fi
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echo "$nsout" | grep -o 'Address:.*' | grep -Eo '(\d+\.?){4}' | tail -n1
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}
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print_ip() {
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echo "VPN IP: $(get_ip)"
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}
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switch_user() {
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su -c "cd $OVPN_WORKDIR && "'$SHELL' -l "$OVPN_USER"
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}
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own_ip="$(get_ip)"
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echo "OWN IP: $own_ip"
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if [ "$own_ip" = "" ]; then
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echo "ERROR: Failed to lookup own ip, aborting" >&2
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exit 1
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fi
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change_hostname
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create_net_dev
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connect_vpn
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for _ in {1..50}; do
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vpn_ip="$(get_ip)"
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if [ "$vpn_ip" = "$own_ip" ] || [ "$vpn_ip" = "" ]; then
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sleep .1
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else
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break
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fi
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done
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if [ "$vpn_ip" = "$own_ip" ] || [ "$vpn_ip" = "" ]; then
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echo "ERROR: Failed to connect to VPN (vpn_ip=$vpn_ip), aborting" >&2
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exit 1
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fi
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echo "VPN IP: $vpn_ip"
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switch_user
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