#!/bin/bash
source "$(dirname "${BASH_SOURCE[0]}")"/ncsid_lib.sh

DiscoverRouter6() {
  local netdev="$1"

  local output
  local st=0
  output="$(RunInterruptible rdisc6 -1 -r 5 -w 1000 -n "$netdev")" || st=$?
  if (( st != 0 )); then
    echo "rdisc6 failed with: " >&2
    echo "$output" >&2
    return $st
  fi

  local ip="$(echo "$output" | grep 'from' | awk '{print $2}')"
  local mac="$(echo "$output" | grep 'Source link-layer' | ParseMACFromLine)"
  printf '{"router_ip":"%s","router_mac":"%s"}\n' "$ip" "$mac"
}

HandleDHCP6() {
  local op="$1"

  if [ "$op" = "bound" ]; then
    echo "INTF: $interface" >&2
    echo "IP: $ipv6/128" >&2

    local disc
    if ! disc="$(DiscoverRouter6 "$interface")"; then
      echo "Failed to discover router" >&2
      return 1
    fi
    local vars
    vars="$(echo "$disc" | JSONToVars)" || return
    eval "$vars" || return
    echo "GW: $router_ip" >&2
    echo "GW_MAC: $router_mac" >&2

    SuppressTerm
    local service='xyz.openbmc_project.Network'
    local rc=0
    UpdateIP "$service" "$interface" "$ipv6" '128' && \
      UpdateGateway "$service" "$router_ip" && \
      UpdateNeighbor "$service" "$interface" "$router_ip" "$router_mac" || \
      rc=$?
    UnsuppressTerm
    touch /run/dhcp6.done
    return $rc
  fi
}

Main() {
  set -o nounset
  set -o errexit
  set -o pipefail

  InitTerm
  HandleDHCP6 "$@"
}

return 0 2>/dev/null
Main "$@"