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#!/bin/bash
#
# azilink for OS X

init() {
    adb forward tcp:41927 tcp:41927
    sudo openvpn2 --dev tun \
                  --remote 127.0.0.1 41927 \
                  --proto tcp-client \
                  --ifconfig 192.168.56.2 192.168.56.1 \
                  --route 0.0.0.0 128.0.0.0 \
                  --route 128.0.0.0 128.0.0.0 \
                  --keepalive 10 30 \
                  --up "$0 up" \
                  --down "$0 down"
}


up() {
    tun_dev=$1
    ns=192.168.56.1
    sudo scutil << EOF
open
d.init
get State:/Network/Interface/$tun_dev/IPv4
d.add InterfaceName $tun_dev
set State:/Network/Service/openvpn-$tun_dev/IPv4

d.init
d.add ServerAddresses * $ns
set State:/Network/Service/openvpn-$tun_dev/DNS
quit
EOF
}


down() {
    tun_dev=$1
    sudo scutil << EOF
open
remove State:/Network/Service/openvpn-$tun_dev/IPv4
remove State:/Network/Service/openvpn-$tun_dev/DNS
quit
EOF
}


case $1 in
    up  ) up $2 ;;  # openvpn will pass tun/tap dev as $2
    down) down $2 ;;
    *   ) init ;;
esac