regip

#!/usr/bin/env bash

LOCK="/tmp/regip"
[[ -e "${LOCK}" ]] && exit 0
/usr/bin/touch "${LOCK}"

DYNDNS_SRV="https://sev.spacescience.ro"
APP_PATH="/dnsmasq/reg.php?"
SRV_URL="${DYNDNS_SRV}${APP_PATH}"

case "${1}" in
  privateip)
    PRIVATEIP="1"
    shift
    ;;
  thisip)
    CUSTOM_IP="1"
    shift
    IP="${1}"
    shift
    ;;
esac

if [[ -z "${CUSTOM_IP}" ]]; then
  DEFAULT_IP=$(/sbin/ip route get $(/sbin/ip route show 0.0.0.0/0 | /bin/grep -oP 'via \K\S+') | /bin/grep -oP 'src \K\S+')
  if [[ -n "${PRIVATEIP}" ]]; then
    # we want only private addresses (we expect that the public ones even if dynamic are registered in dns)
    IP="$(/bin/grep -P '/(^127\.)|(^192\.168\.)|(^10\.)|(^172\.1[6-9]\.)|(^172\.2[0-9]\.)|(^172\.3[0-1]\.)/' <<< "${DEFAULT_IP}")" #'
  else # use whatever is the default one (it has the default route)
    IP="${DEFAULT_IP}"
  fi
fi

[[ -z "${IP}" ]] && { echo "No ip selected"; exit 1; }
/usr/bin/timeout --kill-after=5 10 /usr/bin/curl -fslk --retry 3 --header "Forwarded: ${IP}" "${SRV_URL}$(/bin/hostname)"
/bin/rm -rf "${LOCK}"