#!/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

[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"

this_file="$(readlink -f -- "${BASH_SOURCE[0]}")"
readonly this_file this_dir="${this_file%/*}"
cd "$this_dir"

usage() {
  cat <<'EOF'
usage: wrt-setup [-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,
rsync 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
rsync 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 0
}


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 "$0: h=$h"
# todo: ecdsa key not working with dropbear
cat ~/.ssh/{h,hrsa,home}.pub | ssh $h dd of=/etc/dropbear/authorized_keys
rsync /a/work/libremanage/libremanage /a/bin/fai/wrt-init /a/bin/fai/wrt-setup-local /a/bin/fai/dnsmasq-end-lease /a/bin/cedit/cedit $h:/usr/bin
# relay is built for openwrt 18.06.2, r7676-cddd7b4c77

#/a/opt/openwrt/source/bin/packages/mips_24kc/mypackages/relay_1.0-1_mips_24kc.ipk \

rsync /q/root/shadow/router /p/c/machine_specific/wrt/etc/dropbear/dropbear_rsa_host_key \
     /p/router-secrets /p/c/machine_specific/wrt/etc/wg.{key,psk}  /p/c/{ptr,dnsmasq,cmc-firewall}-data /b/bash-bear-trap/bash-bear $h:
rsync ../openwrtkeyring/usign/* $h:/etc/opkg/keys

ssh $h wrt-init ${HOME_DOMAIN:-b8.nz} "$@"