#!/bin/bash
# Copyright (C) 2016 Ian Kelling

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR

x="$(readlink -f "$BASH_SOURCE")"; cd ${x%/*}

usage() {
  cat <<EOF
usage: ${0##*/} [-h|--help] [HOST/IP] [wrt-setup-local_ARGS]
setup my router in general: dhcp, dns, etc.

Default HOST is 10.0.0.1 or 10.2.0.1 if they are the gateway, otherwise
it must be specified.

Note, use -m "''" to send an empty mac arg. When we get a new enough
bash, we can use ${@@Q} to properly pass an empty var.


Note, if we dont have internet yet, then just download the bash package,
scp it over manually and install it, eg:

cat /etc/opkg/distfeeds.conf
wget https://librecmc.org/librecmc/downloads/snapshots/v1.5.1-core/packages/mips_24kc/packages/bash_5.0-3_mips_24kc.ipk
scp bash_5.0-3_mips_24kc.ipk wrt:
ssh wrt
opkg install /root/bash_5.0-3_mips_24kc.ipk
EOF
  wrt-setup-local -h
  exit $1
}


case $1 in
  -h|--help) usage ;;
  -*) : ;;
  ?*) h="$1"; shift ;;
esac

if [[ ! $h ]]; then
  read -r _ _  gateway _ < <(ip -4 route get 8.8.8.8)
  case $gateway in
    10.0.0.1|10.2.0.1)
      h=root@$gateway
      ;;
    *)
      echo "$0: error: gateway = $gateway and no HOST/IP specified"
      exit 1
      ;;
  esac
fi

echo "$0: host=$h"

cat ~/.ssh/home.pub | ssh $h dd of=/etc/dropbear/authorized_keys 2>/dev/null
scp /a/work/libremanage/libremanage /a/bin/fai/wrt-setup-local /a/bin/cedit/cedit $h:/usr/bin
# relay is built for openwrt 18.06.2, r7676-cddd7b4c77
sudo scp /q/root/shadow/router /p/c/machine_specific/wrt/etc/dropbear/dropbear_rsa_host_key \
     /a/opt/openwrt/source/bin/packages/mips_24kc/mypackages/relay_1.0-1_mips_24kc.ipk \
     /p/router-secrets /p/c/machine_specific/wrt/etc/wg.{key,psk} $h:
scp ../openwrtkeyring/usign/* $h:/etc/opkg/keys

ssh $h <<EOFOUTER
set -x
# librecmc 1.5.1 is missing nfs-kernel-server and screen
source /etc/os-release
if [[ $ID == librecmc && $VERSION == v1.5.1-core]]; then
 cat >/etc/opkg/customfeeds.conf <<'EOF'
src/gz openwrt_packages http://downloads.openwrt.org/releases/19.07.3/packages/mips_24kc/packages
fi
EOF

if ! opkg list-installed|grep bash; then
    opkg update
    opkg install bash
fi
export HOME_DOMAIN=$HOME_DOMAIN
wrt-setup-local $@
EOFOUTER