#!/usr/bin/env bash

if [[ -n ${IPF_PERSIST_SH_LOADED:-} ]]; then
  return 0
fi
IPF_PERSIST_SH_LOADED=1

: "${NETFILTER_PERSISTENT_BIN:=netfilter-persistent}"
: "${IPF_SKIP_PERSIST:=0}"

persist_available() {
  [[ ${IPF_SKIP_PERSIST} == 1 ]] || command_is_available "${NETFILTER_PERSISTENT_BIN}"
}

persist_save() {
  [[ ${IPF_SKIP_PERSIST} == 1 ]] && return 0
  persist_available || { log_err '未找到 netfilter-persistent，无法保存规则。'; return 1; }
  "${NETFILTER_PERSISTENT_BIN}" save >/dev/null
}

persist_reload() {
  [[ ${IPF_SKIP_PERSIST} == 1 ]] && return 0
  persist_available || { log_err '未找到 netfilter-persistent，无法重载规则。'; return 1; }
  "${NETFILTER_PERSISTENT_BIN}" reload >/dev/null
}