fidl_fuchsia_ebpf__common/

fidl_fuchsia_ebpf__common.rs

// WARNING: This file is machine generated by fidlgen.

#![warn(clippy::all)]
#![allow(unused_parens, unused_mut, unused_imports, nonstandard_style)]

use bitflags::bitflags;
use fidl::encoding::{MessageBufFor, ProxyChannelBox, ResourceDialect};
use futures::future::{self, MaybeDone, TryFutureExt};
use zx_status;

/// Maximum allowed number of instructions in an eBPF program.
pub const MAX_PROGRAM_INSTRUCTIONS: u32 = 4096;

/// Maximum number of maps an eBPF program can use.
pub const MAX_PROGRAM_MAPS: u32 = 4096;

/// The signal raised on a [`ProgramHandle`] to indicate that the program
/// should be dropped.
pub const PROGRAM_DEFUNCT_SIGNAL: u32 = 16777216;

bitflags! {
    /// Map flags.
    #[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
    pub struct MapFlags: u32 {
        /// Memory is not pre-allocated.
        const NO_PREALLOC = 1;
        /// `bpf()` syscall can read from the map, but can't write to it.
        const SYSCALL_READ_ONLY = 2;
        /// `bpf()` syscall can write to the map, but can't read it.
        const SYSCALL_WRITE_ONLY = 4;
        /// The map can be mapped in a Starnix process's address space.
        const MMAPABLE = 8;
    }
}

impl MapFlags {
    #[inline(always)]
    pub fn from_bits_allow_unknown(bits: u32) -> Self {
        Self::from_bits_retain(bits)
    }

    #[inline(always)]
    pub fn has_unknown_bits(&self) -> bool {
        self.get_unknown_bits() != 0
    }

    #[inline(always)]
    pub fn get_unknown_bits(&self) -> u32 {
        self.bits() & !Self::all().bits()
    }
}

/// Type of an eBPF maps.
#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
#[repr(u32)]
pub enum MapType {
    /// An array map. Equivalent to `BPF_MAP_TYPE_ARRAY`.
    Array = 1,
    /// A hash map. Equivalent to `BPF_MAP_TYPE_HASH`.
    HashMap = 2,
    /// A hash map. Equivalent to `BPF_MAP_TYPE_RINGBUF`.
    RingBuffer = 3,
    /// A per-CPU array. Equivalent to `BPF_MAP_TYPE_PERCPU_ARRAY`.
    PercpuArray = 4,
    /// A per-CPU hash map. Equivalent to `BPF_MAP_TYPE_PERCPU_HASH`.
    PercpuHash = 5,
    /// A device-map that holds references to network devices. Equivalent to
    /// `BPF_MAP_TYPE_DEVMAP`.
    DevmapHash = 6,
    /// A longest prefix match trie. Equivalent to `BPF_MAP_TYPE_LPM_TRIE`.
    LpmTrie = 7,
    /// A LRU hash map. Equivalent to `BPF_MAP_TYPE_LRU_HASH`.
    LruHash = 8,
    /// A socket storage map. Equivalent to `BPF_MAP_TYPE_SK_STORAGE`.
    SkStorage = 9,
}

impl MapType {
    #[inline]
    pub fn from_primitive(prim: u32) -> Option<Self> {
        match prim {
            1 => Some(Self::Array),
            2 => Some(Self::HashMap),
            3 => Some(Self::RingBuffer),
            4 => Some(Self::PercpuArray),
            5 => Some(Self::PercpuHash),
            6 => Some(Self::DevmapHash),
            7 => Some(Self::LpmTrie),
            8 => Some(Self::LruHash),
            9 => Some(Self::SkStorage),
            _ => None,
        }
    }

    #[inline]
    pub const fn into_primitive(self) -> u32 {
        self as u32
    }
}

/// An identifier of a struct that may be passed to an eBPF program.
#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub enum StructId {
    SkBuff,
    XdpMd,
    BpfUserPtRegs,
    BpfSock,
    BpfSockOpt,
    BpfSockAddr,
    BpfFuse,
    #[doc(hidden)]
    __SourceBreaking {
        unknown_ordinal: u32,
    },
}

/// Pattern that matches an unknown `StructId` member.
#[macro_export]
macro_rules! StructIdUnknown {
    () => {
        _
    };
}

impl StructId {
    #[inline]
    pub fn from_primitive(prim: u32) -> Option<Self> {
        match prim {
            1 => Some(Self::SkBuff),
            2 => Some(Self::XdpMd),
            3 => Some(Self::BpfUserPtRegs),
            4 => Some(Self::BpfSock),
            5 => Some(Self::BpfSockOpt),
            6 => Some(Self::BpfSockAddr),
            7 => Some(Self::BpfFuse),
            _ => None,
        }
    }

    #[inline]
    pub fn from_primitive_allow_unknown(prim: u32) -> Self {
        match prim {
            1 => Self::SkBuff,
            2 => Self::XdpMd,
            3 => Self::BpfUserPtRegs,
            4 => Self::BpfSock,
            5 => Self::BpfSockOpt,
            6 => Self::BpfSockAddr,
            7 => Self::BpfFuse,
            unknown_ordinal => Self::__SourceBreaking { unknown_ordinal },
        }
    }

    #[inline]
    pub fn unknown() -> Self {
        Self::__SourceBreaking { unknown_ordinal: 0xffffffff }
    }

    #[inline]
    pub const fn into_primitive(self) -> u32 {
        match self {
            Self::SkBuff => 1,
            Self::XdpMd => 2,
            Self::BpfUserPtRegs => 3,
            Self::BpfSock => 4,
            Self::BpfSockOpt => 5,
            Self::BpfSockAddr => 6,
            Self::BpfFuse => 7,
            Self::__SourceBreaking { unknown_ordinal } => unknown_ordinal,
        }
    }

    #[inline]
    pub fn is_unknown(&self) -> bool {
        match self {
            Self::__SourceBreaking { unknown_ordinal: _ } => true,
            _ => false,
        }
    }
}

/// Schema of an eBPF map.
#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct MapSchema {
    /// Map type.
    pub type_: MapType,
    /// Key size in bytes.
    pub key_size: u32,
    /// Value size in bytes.
    pub value_size: u32,
    /// Maximum number of entries in the map.
    pub max_entries: u32,
    /// Map flags.
    pub flags: MapFlags,
}

impl fidl::Persistable for MapSchema {}

/// An ID used to uniquely identify an eBPF program. The ID is the KOID of the
/// [`ProgramHandle`].
#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
#[repr(C)]
pub struct ProgramId {
    pub id: u64,
}

impl fidl::Persistable for ProgramId {}

/// Describes location of an instruction that accesses a struct field.
///
/// This is used as auxiliary information passed from the verifier to the
/// linker. The linker may update these instructions.
#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
pub struct StructAccess {
    /// Index of the instruction in the program.
    pub pc: u32,
    /// Id of the struct being accessed.
    pub struct_id: StructId,
    /// Offset of the field being accessed.
    pub field_offset: u32,
    /// Indicates that the instruction loads a 32-bit pointer field. These
    /// loads must be remapped to 64-bit fields.
    pub is_32_bit_ptr_load: bool,
}

impl fidl::Persistable for StructAccess {}

mod internal {
    use super::*;
    unsafe impl fidl::encoding::TypeMarker for MapFlags {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            4
        }
    }

    impl fidl::encoding::ValueTypeMarker for MapFlags {
        type Borrowed<'a> = Self;
        #[inline(always)]
        fn borrow(value: &<Self as fidl::encoding::TypeMarker>::Owned) -> Self::Borrowed<'_> {
            *value
        }
    }

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<Self, D> for MapFlags {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Self>(offset);
            encoder.write_num(self.bits(), offset);
            Ok(())
        }
    }

    impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Decode<Self, D> for MapFlags {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::empty()
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let prim = decoder.read_num::<u32>(offset);
            *self = Self::from_bits_allow_unknown(prim);
            Ok(())
        }
    }
    unsafe impl fidl::encoding::TypeMarker for MapType {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            std::mem::align_of::<u32>()
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            std::mem::size_of::<u32>()
        }

        #[inline(always)]
        fn encode_is_copy() -> bool {
            true
        }

        #[inline(always)]
        fn decode_is_copy() -> bool {
            false
        }
    }

    impl fidl::encoding::ValueTypeMarker for MapType {
        type Borrowed<'a> = Self;
        #[inline(always)]
        fn borrow(value: &<Self as fidl::encoding::TypeMarker>::Owned) -> Self::Borrowed<'_> {
            *value
        }
    }

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<Self, D> for MapType {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Self>(offset);
            encoder.write_num(self.into_primitive(), offset);
            Ok(())
        }
    }

    impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Decode<Self, D> for MapType {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::Array
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let prim = decoder.read_num::<u32>(offset);

            *self = Self::from_primitive(prim).ok_or(fidl::Error::InvalidEnumValue)?;
            Ok(())
        }
    }
    unsafe impl fidl::encoding::TypeMarker for StructId {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            std::mem::align_of::<u32>()
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            std::mem::size_of::<u32>()
        }

        #[inline(always)]
        fn encode_is_copy() -> bool {
            false
        }

        #[inline(always)]
        fn decode_is_copy() -> bool {
            false
        }
    }

    impl fidl::encoding::ValueTypeMarker for StructId {
        type Borrowed<'a> = Self;
        #[inline(always)]
        fn borrow(value: &<Self as fidl::encoding::TypeMarker>::Owned) -> Self::Borrowed<'_> {
            *value
        }
    }

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<Self, D> for StructId {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Self>(offset);
            encoder.write_num(self.into_primitive(), offset);
            Ok(())
        }
    }

    impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Decode<Self, D> for StructId {
        #[inline(always)]
        fn new_empty() -> Self {
            Self::unknown()
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let prim = decoder.read_num::<u32>(offset);

            *self = Self::from_primitive_allow_unknown(prim);
            Ok(())
        }
    }

    impl fidl::encoding::ValueTypeMarker for MapSchema {
        type Borrowed<'a> = &'a Self;
        fn borrow(value: &<Self as fidl::encoding::TypeMarker>::Owned) -> Self::Borrowed<'_> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for MapSchema {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            20
        }
    }

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<MapSchema, D>
        for &MapSchema
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<MapSchema>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<MapSchema, D>::encode(
                (
                    <MapType as fidl::encoding::ValueTypeMarker>::borrow(&self.type_),
                    <u32 as fidl::encoding::ValueTypeMarker>::borrow(&self.key_size),
                    <u32 as fidl::encoding::ValueTypeMarker>::borrow(&self.value_size),
                    <u32 as fidl::encoding::ValueTypeMarker>::borrow(&self.max_entries),
                    <MapFlags as fidl::encoding::ValueTypeMarker>::borrow(&self.flags),
                ),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        D: fidl::encoding::ResourceDialect,
        T0: fidl::encoding::Encode<MapType, D>,
        T1: fidl::encoding::Encode<u32, D>,
        T2: fidl::encoding::Encode<u32, D>,
        T3: fidl::encoding::Encode<u32, D>,
        T4: fidl::encoding::Encode<MapFlags, D>,
    > fidl::encoding::Encode<MapSchema, D> for (T0, T1, T2, T3, T4)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<MapSchema>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 4, depth)?;
            self.2.encode(encoder, offset + 8, depth)?;
            self.3.encode(encoder, offset + 12, depth)?;
            self.4.encode(encoder, offset + 16, depth)?;
            Ok(())
        }
    }

    impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Decode<Self, D> for MapSchema {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                type_: fidl::new_empty!(MapType, D),
                key_size: fidl::new_empty!(u32, D),
                value_size: fidl::new_empty!(u32, D),
                max_entries: fidl::new_empty!(u32, D),
                flags: fidl::new_empty!(MapFlags, D),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            fidl::decode!(MapType, D, &mut self.type_, decoder, offset + 0, _depth)?;
            fidl::decode!(u32, D, &mut self.key_size, decoder, offset + 4, _depth)?;
            fidl::decode!(u32, D, &mut self.value_size, decoder, offset + 8, _depth)?;
            fidl::decode!(u32, D, &mut self.max_entries, decoder, offset + 12, _depth)?;
            fidl::decode!(MapFlags, D, &mut self.flags, decoder, offset + 16, _depth)?;
            Ok(())
        }
    }

    impl fidl::encoding::ValueTypeMarker for ProgramId {
        type Borrowed<'a> = &'a Self;
        fn borrow(value: &<Self as fidl::encoding::TypeMarker>::Owned) -> Self::Borrowed<'_> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for ProgramId {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            8
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            8
        }
        #[inline(always)]
        fn encode_is_copy() -> bool {
            true
        }

        #[inline(always)]
        fn decode_is_copy() -> bool {
            true
        }
    }

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<ProgramId, D>
        for &ProgramId
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ProgramId>(offset);
            unsafe {
                // Copy the object into the buffer.
                let buf_ptr = encoder.buf.as_mut_ptr().add(offset);
                (buf_ptr as *mut ProgramId).write_unaligned((self as *const ProgramId).read());
                // Zero out padding regions. Unlike `fidl_struct_impl_noncopy!`, this must be
                // done second because the memcpy will write garbage to these bytes.
            }
            Ok(())
        }
    }
    unsafe impl<D: fidl::encoding::ResourceDialect, T0: fidl::encoding::Encode<u64, D>>
        fidl::encoding::Encode<ProgramId, D> for (T0,)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<ProgramId>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            Ok(())
        }
    }

    impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Decode<Self, D> for ProgramId {
        #[inline(always)]
        fn new_empty() -> Self {
            Self { id: fidl::new_empty!(u64, D) }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let buf_ptr = unsafe { decoder.buf.as_ptr().add(offset) };
            // Verify that padding bytes are zero.
            // Copy from the buffer into the object.
            unsafe {
                std::ptr::copy_nonoverlapping(buf_ptr, self as *mut Self as *mut u8, 8);
            }
            Ok(())
        }
    }

    impl fidl::encoding::ValueTypeMarker for StructAccess {
        type Borrowed<'a> = &'a Self;
        fn borrow(value: &<Self as fidl::encoding::TypeMarker>::Owned) -> Self::Borrowed<'_> {
            value
        }
    }

    unsafe impl fidl::encoding::TypeMarker for StructAccess {
        type Owned = Self;

        #[inline(always)]
        fn inline_align(_context: fidl::encoding::Context) -> usize {
            4
        }

        #[inline(always)]
        fn inline_size(_context: fidl::encoding::Context) -> usize {
            16
        }
    }

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<StructAccess, D>
        for &StructAccess
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<StructAccess>(offset);
            // Delegate to tuple encoding.
            fidl::encoding::Encode::<StructAccess, D>::encode(
                (
                    <u32 as fidl::encoding::ValueTypeMarker>::borrow(&self.pc),
                    <StructId as fidl::encoding::ValueTypeMarker>::borrow(&self.struct_id),
                    <u32 as fidl::encoding::ValueTypeMarker>::borrow(&self.field_offset),
                    <bool as fidl::encoding::ValueTypeMarker>::borrow(&self.is_32_bit_ptr_load),
                ),
                encoder,
                offset,
                _depth,
            )
        }
    }
    unsafe impl<
        D: fidl::encoding::ResourceDialect,
        T0: fidl::encoding::Encode<u32, D>,
        T1: fidl::encoding::Encode<StructId, D>,
        T2: fidl::encoding::Encode<u32, D>,
        T3: fidl::encoding::Encode<bool, D>,
    > fidl::encoding::Encode<StructAccess, D> for (T0, T1, T2, T3)
    {
        #[inline]
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<StructAccess>(offset);
            // Zero out padding regions. There's no need to apply masks
            // because the unmasked parts will be overwritten by fields.
            unsafe {
                let ptr = encoder.buf.as_mut_ptr().add(offset).offset(12);
                (ptr as *mut u32).write_unaligned(0);
            }
            // Write the fields.
            self.0.encode(encoder, offset + 0, depth)?;
            self.1.encode(encoder, offset + 4, depth)?;
            self.2.encode(encoder, offset + 8, depth)?;
            self.3.encode(encoder, offset + 12, depth)?;
            Ok(())
        }
    }

    impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Decode<Self, D> for StructAccess {
        #[inline(always)]
        fn new_empty() -> Self {
            Self {
                pc: fidl::new_empty!(u32, D),
                struct_id: fidl::new_empty!(StructId, D),
                field_offset: fidl::new_empty!(u32, D),
                is_32_bit_ptr_load: fidl::new_empty!(bool, D),
            }
        }

        #[inline]
        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            _depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            // Verify that padding bytes are zero.
            let ptr = unsafe { decoder.buf.as_ptr().add(offset).offset(12) };
            let padval = unsafe { (ptr as *const u32).read_unaligned() };
            let mask = 0xffffff00u32;
            let maskedval = padval & mask;
            if maskedval != 0 {
                return Err(fidl::Error::NonZeroPadding {
                    padding_start: offset + 12 + ((mask as u64).trailing_zeros() / 8) as usize,
                });
            }
            fidl::decode!(u32, D, &mut self.pc, decoder, offset + 0, _depth)?;
            fidl::decode!(StructId, D, &mut self.struct_id, decoder, offset + 4, _depth)?;
            fidl::decode!(u32, D, &mut self.field_offset, decoder, offset + 8, _depth)?;
            fidl::decode!(bool, D, &mut self.is_32_bit_ptr_load, decoder, offset + 12, _depth)?;
            Ok(())
        }
    }
}