#!/usr/bin/env bash
set -eu

if [[ -n "${TINC_DEBUG+1}" ]]; then
  set -x
fi

SCRIPT_DIR=$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)

source "$SCRIPT_DIR/lib/core.bash"
source "$SCRIPT_DIR/lib/cidr.bash"
source "$SCRIPT_DIR/lib/dhcp.bash"
source "$SCRIPT_DIR/lib/ip.bash"
source "$SCRIPT_DIR/lib/mac.bash"
source "$SCRIPT_DIR/lib/route.bash"

#disable_ipv6_privacy() {
#  local interface=$1
#  if [[ "$OSTYPE" == "linux-gnu" ]]; then
#    sysctl -w "net.ipv6.conf.${interface}.use_tempaddr=0"
#  elif [[ "$OSTYPE" == "openbsd"* ]]; then
#    ifconfig "${interface}" -autoconfprivacy
#  elif has sysctl; then
#    sysctl -w net.inet6.ip6.use_tempaddr=0
#  fi
#}

[ -z "${INTERFACE:-}" ] && die "no INTERFACE environment variable set"

MAC_ADDRESS_FILE="${SCRIPT_DIR}/tinc-macaddr"
LOCAL_HOOK_FILE="${SCRIPT_DIR}/tinc-up.local"
TINCRC="${SCRIPT_DIR}/tincrc"

MAC_ADDRESS=""
SUBNET=""
DHCP="yes"
ULA_IP6_TEMPLATE="fdc0:4992:6a6d:a:%x%x:%x%x::1"
PUBLIC_IP6_PREFIX="2a01:4f8:210:31fd"
PUBLIC_IP6_TEMPLATE="$PUBLIC_IP6_PREFIX:1:%x%x:%x%x:1"

source "${TINCRC}" || true

if [ -z "$MAC_ADDRESS" ]; then
  echo "${MAC_ADDRESS_FILE} does not exists. Generate it with ./tinc-generate-mac..."
  "$DIR/tinc-generate-mac"
  source "$TINCRC"
fi

set_mac "$INTERFACE" "$MAC_ADDRESS"
public_ip6="$(format_ip6_from_mac $PUBLIC_IP6_TEMPLATE $MAC_ADDRESS)"
ula_ip6="$(format_ip6_from_mac $ULA_IP6_TEMPLATE $MAC_ADDRESS)"
add_ip6 "$INTERFACE" "$public_ip6" "80"
add_ip6 "$INTERFACE" "$ula_ip6" "64"

add_route6 "$INTERFACE" "fc00::" "fe80::3" "7"
add_route6 "$INTERFACE" "$PUBLIC_IP6_PREFIX::" "fe80::3" "64"

if [ -n "$SUBNET" ]; then
  IFS=' ' read ip netmask <<< "$SUBNET"
  [ -z "$ip" ] && die "no ip set in SUBNET"
  [ -z "$netmask" ] && die "no netmask set in SUBNET"
  add_ip4 "$INTERFACE" "$ip" "$netmask"
fi

if [ "${DHCP,,}" = "yes" ]; then
  start_dhcp "$INTERFACE"
fi

[ -x "${SCRIPT_DIR}/tinc-up.local" ] && "${SCRIPT_DIR}/tinc-up.local" || true