#!/bin/sh
# 2020-06-13, Nico Schottelius
# See https://ungleich.ch/u/products/viirb-ipv6-box/

if [ $# -lt 1 ]; then
    echo "$0 interface [address]"
    echo "    interface to add the config ip address to"
    echo "    address: connect to this address, ignore the interface"
    exit 1
fi

set -x
dev=$1; shift

if [ $# -ge 1 ]; then
    viirb_ip=$1; shift
    dev=""
else
    viirb_ip=192.168.61.1
fi

# openwrt
version=19.07.3
filename=openwrt-${version}-ramips-mt76x8-vocore2-squashfs-sysupgrade.bin

# IP address for setting it up initially

if [ "$dev" ]; then
    sudo ip addr del 192.168.61.2/24 dev "$dev" 2>/dev/null || true
    sudo ip addr add 192.168.61.2/24 dev "$dev"
fi

# don't care about other/old known_host entries
ssh-keygen  -R ${viirb_ip}

ping -c2 ${viirb_ip}
if [ $? -ne 0 ]; then
    echo "Cannot reach any VIIRB - exiting"
    exit 1
fi

cat ~/.ssh/id_rsa.pub | ssh root@${viirb_ip} "cat > /etc/dropbear/authorized_keys"

# Don't re-download if we already have it
wget -c http://downloads.openwrt.org/releases/${version}/targets/ramips/mt76x8/${filename}
scp ${filename} root@${viirb_ip}:/tmp
ssh root@${viirb_ip} "sysupgrade /tmp/*.bin"

# It still pings for some time - wait for the reboot to happen
echo "Waiting for VIIRB to disappear"
sleep 15

wait=0
found=""

while [ $wait -lt 180 ]; do
    ping -c1 ${viirb_ip} >/dev/null

    if [ $? -eq 0 ]; then
        found=yes
        # wait for ssh to come up
        sleep 10
        break
    fi

    sleep 1
    wait=$((wait+1))
    done

if [ ! "$found" ]; then
    echo "Did not find updated viirb - debug / restart it"
    exit 1
fi

echo "VIIRB successfully updated to ${version}"