use rlua::prelude::*;use std::net::Ipv4Addr;use crate::bindings::net::ipv6::LuaIpv6;pub struct LuaIpv4(pub Ipv4Addr);impl LuaUserData for LuaIpv4 {    fn add_methods<'lua, M: LuaUserDataMethods<'lua, Self>>(methods: &mut M) {        methods.add_method("octets", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.octets().to_vec())        });        methods.add_method("is_unspecified", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_unspecified())        });        methods.add_method("is_loopback", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_loopback())        });        methods.add_method("is_private", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_private())        });        methods.add_method("is_link_local", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_link_local())        });        methods.add_method("is_multicast", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_multicast())        });        methods.add_method("is_broadcast", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_broadcast())        });        methods.add_method("is_documentation", |_, this: &LuaIpv4, _: ()| {            Ok(this.0.is_documentation())        });        methods.add_method("to_ipv6_compatible", |_, this: &LuaIpv4, _: ()| {            Ok(LuaIpv6(this.0.to_ipv6_compatible()))        });        methods.add_method("to_ipv6_mapped", |_, this: &LuaIpv4, _: ()| {            Ok(LuaIpv6(this.0.to_ipv6_mapped()))        });        methods.add_meta_method(LuaMetaMethod::ToString, |_, this, _: ()| {            Ok(this.0.to_string())        });    }}pub fn init(lua: &Lua) -> crate::Result<()> {    let module = lua.create_table()?;    module.set("new", lua.create_function( |_, ip: String| {        ip.parse().map(LuaIpv4).map_err(LuaError::external)    })? )?;    module.set("from_table", lua.create_function( |_, ip: Vec<u8>| {        if ip.len() != 4 {            return Ok(None);        }        let (a, b, c, d) = (            ip.get(0).unwrap_or(&0),            ip.get(1).unwrap_or(&0),            ip.get(2).unwrap_or(&0),            ip.get(3).unwrap_or(&0));        Ok(Some(LuaIpv4(Ipv4Addr::new(*a, *b, *c, *d))))    })? )?;    lua.globals().set("ipv4", module)?;    Ok(())}