fidl_fuchsia_net_reachability/

fidl_fuchsia_net_reachability.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::client::QueryResponseFut;
use fidl::encoding::{MessageBufFor, ProxyChannelBox, ResourceDialect};
use fidl::endpoints::{ControlHandle as _, Responder as _};
use futures::future::{self, MaybeDone, TryFutureExt};
use zx_status;

#[derive(Clone, Debug, Default, PartialEq)]
pub struct MonitorOptions {
    #[doc(hidden)]
    pub __source_breaking: fidl::marker::SourceBreaking,
}

impl fidl::Persistable for MonitorOptions {}

/// Information about network configuration and apparent reachability status
/// of external networks.
#[derive(Clone, Debug, Default, PartialEq)]
pub struct Snapshot {
    /// Signifies whether internet reachability is available.
    pub internet_available: Option<bool>,
    /// Indicates whether any default gateway is reachable at least via
    /// link layer.
    pub gateway_reachable: Option<bool>,
    /// Indicates whether DNS services are functional via any configured
    /// network.
    pub dns_active: Option<bool>,
    /// Indicates whether HTTP fetching is functional via any configured
    /// network.
    pub http_active: Option<bool>,
    #[doc(hidden)]
    pub __source_breaking: fidl::marker::SourceBreaking,
}

impl fidl::Persistable for Snapshot {}

#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
pub struct MonitorMarker;

impl fidl::endpoints::ProtocolMarker for MonitorMarker {
    type Proxy = MonitorProxy;
    type RequestStream = MonitorRequestStream;
    #[cfg(target_os = "fuchsia")]
    type SynchronousProxy = MonitorSynchronousProxy;

    const DEBUG_NAME: &'static str = "fuchsia.net.reachability.Monitor";
}
impl fidl::endpoints::DiscoverableProtocolMarker for MonitorMarker {}

pub trait MonitorProxyInterface: Send + Sync {
    fn r#set_options(&self, payload: &MonitorOptions) -> Result<(), fidl::Error>;
    type WatchResponseFut: std::future::Future<Output = Result<Snapshot, fidl::Error>> + Send;
    fn r#watch(&self) -> Self::WatchResponseFut;
}
#[derive(Debug)]
#[cfg(target_os = "fuchsia")]
pub struct MonitorSynchronousProxy {
    client: fidl::client::sync::Client,
}

#[cfg(target_os = "fuchsia")]
impl fidl::endpoints::SynchronousProxy for MonitorSynchronousProxy {
    type Proxy = MonitorProxy;
    type Protocol = MonitorMarker;

    fn from_channel(inner: fidl::Channel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    fn as_channel(&self) -> &fidl::Channel {
        self.client.as_channel()
    }
}

#[cfg(target_os = "fuchsia")]
impl MonitorSynchronousProxy {
    pub fn new(channel: fidl::Channel) -> Self {
        let protocol_name = <MonitorMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::sync::Client::new(channel, protocol_name) }
    }

    pub fn into_channel(self) -> fidl::Channel {
        self.client.into_channel()
    }

    /// Waits until an event arrives and returns it. It is safe for other
    /// threads to make concurrent requests while waiting for an event.
    pub fn wait_for_event(
        &self,
        deadline: zx::MonotonicInstant,
    ) -> Result<MonitorEvent, fidl::Error> {
        MonitorEvent::decode(self.client.wait_for_event(deadline)?)
    }

    /// Controls verbosity of results returned from calls to [`Watch`]. If
    /// options are set via this method, it must be in the first call made
    /// over the channel.
    ///
    /// Calling this method after either it or [`Watch`] have already been
    /// invoked will result in closing the channel. If this method is not
    /// called before calling [`Watch`], [`Snapshot`] responses will not be
    /// modified.
    pub fn r#set_options(&self, mut payload: &MonitorOptions) -> Result<(), fidl::Error> {
        self.client.send::<MonitorOptions>(
            payload,
            0x2e4e66abc4374253,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    /// Hanging-get API for changes in network reachability state.
    ///
    /// `Watch` returns a snapshot of the system's most recent reachability
    /// state information. The first call returns a current snapshot.
    /// Subsequent calls to `Watch` block until the previously-observed state
    /// changes.
    ///
    /// While this API guarantees that any state returned was a valid network
    /// state at some point, it does not guarantee observation of every
    /// intermediate state.
    ///
    /// It is not valid to call `Watch` concurrently. Calling `Watch` while
    /// another call over the same server end is in flight will result in the
    /// closing the channel.
    ///
    /// - response a snapshot of current system reachability state.
    pub fn r#watch(&self, ___deadline: zx::MonotonicInstant) -> Result<Snapshot, fidl::Error> {
        let _response = self.client.send_query::<fidl::encoding::EmptyPayload, Snapshot>(
            (),
            0x381ea392fef3667f,
            fidl::encoding::DynamicFlags::empty(),
            ___deadline,
        )?;
        Ok(_response)
    }
}

#[derive(Debug, Clone)]
pub struct MonitorProxy {
    client: fidl::client::Client<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl fidl::endpoints::Proxy for MonitorProxy {
    type Protocol = MonitorMarker;

    fn from_channel(inner: ::fidl::AsyncChannel) -> Self {
        Self::new(inner)
    }

    fn into_channel(self) -> Result<::fidl::AsyncChannel, Self> {
        self.client.into_channel().map_err(|client| Self { client })
    }

    fn as_channel(&self) -> &::fidl::AsyncChannel {
        self.client.as_channel()
    }
}

impl MonitorProxy {
    /// Create a new Proxy for fuchsia.net.reachability/Monitor.
    pub fn new(channel: ::fidl::AsyncChannel) -> Self {
        let protocol_name = <MonitorMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME;
        Self { client: fidl::client::Client::new(channel, protocol_name) }
    }

    /// Get a Stream of events from the remote end of the protocol.
    ///
    /// # Panics
    ///
    /// Panics if the event stream was already taken.
    pub fn take_event_stream(&self) -> MonitorEventStream {
        MonitorEventStream { event_receiver: self.client.take_event_receiver() }
    }

    /// Controls verbosity of results returned from calls to [`Watch`]. If
    /// options are set via this method, it must be in the first call made
    /// over the channel.
    ///
    /// Calling this method after either it or [`Watch`] have already been
    /// invoked will result in closing the channel. If this method is not
    /// called before calling [`Watch`], [`Snapshot`] responses will not be
    /// modified.
    pub fn r#set_options(&self, mut payload: &MonitorOptions) -> Result<(), fidl::Error> {
        MonitorProxyInterface::r#set_options(self, payload)
    }

    /// Hanging-get API for changes in network reachability state.
    ///
    /// `Watch` returns a snapshot of the system's most recent reachability
    /// state information. The first call returns a current snapshot.
    /// Subsequent calls to `Watch` block until the previously-observed state
    /// changes.
    ///
    /// While this API guarantees that any state returned was a valid network
    /// state at some point, it does not guarantee observation of every
    /// intermediate state.
    ///
    /// It is not valid to call `Watch` concurrently. Calling `Watch` while
    /// another call over the same server end is in flight will result in the
    /// closing the channel.
    ///
    /// - response a snapshot of current system reachability state.
    pub fn r#watch(
        &self,
    ) -> fidl::client::QueryResponseFut<Snapshot, fidl::encoding::DefaultFuchsiaResourceDialect>
    {
        MonitorProxyInterface::r#watch(self)
    }
}

impl MonitorProxyInterface for MonitorProxy {
    fn r#set_options(&self, mut payload: &MonitorOptions) -> Result<(), fidl::Error> {
        self.client.send::<MonitorOptions>(
            payload,
            0x2e4e66abc4374253,
            fidl::encoding::DynamicFlags::empty(),
        )
    }

    type WatchResponseFut =
        fidl::client::QueryResponseFut<Snapshot, fidl::encoding::DefaultFuchsiaResourceDialect>;
    fn r#watch(&self) -> Self::WatchResponseFut {
        fn _decode(
            mut _buf: Result<<fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc, fidl::Error>,
        ) -> Result<Snapshot, fidl::Error> {
            let _response = fidl::client::decode_transaction_body::<
                Snapshot,
                fidl::encoding::DefaultFuchsiaResourceDialect,
                0x381ea392fef3667f,
            >(_buf?)?;
            Ok(_response)
        }
        self.client.send_query_and_decode::<fidl::encoding::EmptyPayload, Snapshot>(
            (),
            0x381ea392fef3667f,
            fidl::encoding::DynamicFlags::empty(),
            _decode,
        )
    }
}

pub struct MonitorEventStream {
    event_receiver: fidl::client::EventReceiver<fidl::encoding::DefaultFuchsiaResourceDialect>,
}

impl std::marker::Unpin for MonitorEventStream {}

impl futures::stream::FusedStream for MonitorEventStream {
    fn is_terminated(&self) -> bool {
        self.event_receiver.is_terminated()
    }
}

impl futures::Stream for MonitorEventStream {
    type Item = Result<MonitorEvent, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        match futures::ready!(futures::stream::StreamExt::poll_next_unpin(
            &mut self.event_receiver,
            cx
        )?) {
            Some(buf) => std::task::Poll::Ready(Some(MonitorEvent::decode(buf))),
            None => std::task::Poll::Ready(None),
        }
    }
}

#[derive(Debug)]
pub enum MonitorEvent {}

impl MonitorEvent {
    /// Decodes a message buffer as a [`MonitorEvent`].
    fn decode(
        mut buf: <fidl::encoding::DefaultFuchsiaResourceDialect as fidl::encoding::ResourceDialect>::MessageBufEtc,
    ) -> Result<MonitorEvent, fidl::Error> {
        let (bytes, _handles) = buf.split_mut();
        let (tx_header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;
        debug_assert_eq!(tx_header.tx_id, 0);
        match tx_header.ordinal {
            _ => Err(fidl::Error::UnknownOrdinal {
                ordinal: tx_header.ordinal,
                protocol_name: <MonitorMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
            }),
        }
    }
}

/// A Stream of incoming requests for fuchsia.net.reachability/Monitor.
pub struct MonitorRequestStream {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
    is_terminated: bool,
}

impl std::marker::Unpin for MonitorRequestStream {}

impl futures::stream::FusedStream for MonitorRequestStream {
    fn is_terminated(&self) -> bool {
        self.is_terminated
    }
}

impl fidl::endpoints::RequestStream for MonitorRequestStream {
    type Protocol = MonitorMarker;
    type ControlHandle = MonitorControlHandle;

    fn from_channel(channel: ::fidl::AsyncChannel) -> Self {
        Self { inner: std::sync::Arc::new(fidl::ServeInner::new(channel)), is_terminated: false }
    }

    fn control_handle(&self) -> Self::ControlHandle {
        MonitorControlHandle { inner: self.inner.clone() }
    }

    fn into_inner(
        self,
    ) -> (::std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>, bool)
    {
        (self.inner, self.is_terminated)
    }

    fn from_inner(
        inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
        is_terminated: bool,
    ) -> Self {
        Self { inner, is_terminated }
    }
}

impl futures::Stream for MonitorRequestStream {
    type Item = Result<MonitorRequest, fidl::Error>;

    fn poll_next(
        mut self: std::pin::Pin<&mut Self>,
        cx: &mut std::task::Context<'_>,
    ) -> std::task::Poll<Option<Self::Item>> {
        let this = &mut *self;
        if this.inner.check_shutdown(cx) {
            this.is_terminated = true;
            return std::task::Poll::Ready(None);
        }
        if this.is_terminated {
            panic!("polled MonitorRequestStream after completion");
        }
        fidl::encoding::with_tls_decode_buf::<_, fidl::encoding::DefaultFuchsiaResourceDialect>(
            |bytes, handles| {
                match this.inner.channel().read_etc(cx, bytes, handles) {
                    std::task::Poll::Ready(Ok(())) => {}
                    std::task::Poll::Pending => return std::task::Poll::Pending,
                    std::task::Poll::Ready(Err(zx_status::Status::PEER_CLOSED)) => {
                        this.is_terminated = true;
                        return std::task::Poll::Ready(None);
                    }
                    std::task::Poll::Ready(Err(e)) => {
                        return std::task::Poll::Ready(Some(Err(fidl::Error::ServerRequestRead(
                            e.into(),
                        ))))
                    }
                }

                // A message has been received from the channel
                let (header, _body_bytes) = fidl::encoding::decode_transaction_header(bytes)?;

                std::task::Poll::Ready(Some(match header.ordinal {
                    0x2e4e66abc4374253 => {
                        header.validate_request_tx_id(fidl::MethodType::OneWay)?;
                        let mut req = fidl::new_empty!(
                            MonitorOptions,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<MonitorOptions>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = MonitorControlHandle { inner: this.inner.clone() };
                        Ok(MonitorRequest::SetOptions { payload: req, control_handle })
                    }
                    0x381ea392fef3667f => {
                        header.validate_request_tx_id(fidl::MethodType::TwoWay)?;
                        let mut req = fidl::new_empty!(
                            fidl::encoding::EmptyPayload,
                            fidl::encoding::DefaultFuchsiaResourceDialect
                        );
                        fidl::encoding::Decoder::<fidl::encoding::DefaultFuchsiaResourceDialect>::decode_into::<fidl::encoding::EmptyPayload>(&header, _body_bytes, handles, &mut req)?;
                        let control_handle = MonitorControlHandle { inner: this.inner.clone() };
                        Ok(MonitorRequest::Watch {
                            responder: MonitorWatchResponder {
                                control_handle: std::mem::ManuallyDrop::new(control_handle),
                                tx_id: header.tx_id,
                            },
                        })
                    }
                    _ => Err(fidl::Error::UnknownOrdinal {
                        ordinal: header.ordinal,
                        protocol_name:
                            <MonitorMarker as fidl::endpoints::ProtocolMarker>::DEBUG_NAME,
                    }),
                }))
            },
        )
    }
}

/// Provides snapshots of reachability state.
#[derive(Debug)]
pub enum MonitorRequest {
    /// Controls verbosity of results returned from calls to [`Watch`]. If
    /// options are set via this method, it must be in the first call made
    /// over the channel.
    ///
    /// Calling this method after either it or [`Watch`] have already been
    /// invoked will result in closing the channel. If this method is not
    /// called before calling [`Watch`], [`Snapshot`] responses will not be
    /// modified.
    SetOptions { payload: MonitorOptions, control_handle: MonitorControlHandle },
    /// Hanging-get API for changes in network reachability state.
    ///
    /// `Watch` returns a snapshot of the system's most recent reachability
    /// state information. The first call returns a current snapshot.
    /// Subsequent calls to `Watch` block until the previously-observed state
    /// changes.
    ///
    /// While this API guarantees that any state returned was a valid network
    /// state at some point, it does not guarantee observation of every
    /// intermediate state.
    ///
    /// It is not valid to call `Watch` concurrently. Calling `Watch` while
    /// another call over the same server end is in flight will result in the
    /// closing the channel.
    ///
    /// - response a snapshot of current system reachability state.
    Watch { responder: MonitorWatchResponder },
}

impl MonitorRequest {
    #[allow(irrefutable_let_patterns)]
    pub fn into_set_options(self) -> Option<(MonitorOptions, MonitorControlHandle)> {
        if let MonitorRequest::SetOptions { payload, control_handle } = self {
            Some((payload, control_handle))
        } else {
            None
        }
    }

    #[allow(irrefutable_let_patterns)]
    pub fn into_watch(self) -> Option<(MonitorWatchResponder)> {
        if let MonitorRequest::Watch { responder } = self {
            Some((responder))
        } else {
            None
        }
    }

    /// Name of the method defined in FIDL
    pub fn method_name(&self) -> &'static str {
        match *self {
            MonitorRequest::SetOptions { .. } => "set_options",
            MonitorRequest::Watch { .. } => "watch",
        }
    }
}

#[derive(Debug, Clone)]
pub struct MonitorControlHandle {
    inner: std::sync::Arc<fidl::ServeInner<fidl::encoding::DefaultFuchsiaResourceDialect>>,
}

impl fidl::endpoints::ControlHandle for MonitorControlHandle {
    fn shutdown(&self) {
        self.inner.shutdown()
    }
    fn shutdown_with_epitaph(&self, status: zx_status::Status) {
        self.inner.shutdown_with_epitaph(status)
    }

    fn is_closed(&self) -> bool {
        self.inner.channel().is_closed()
    }
    fn on_closed(&self) -> fidl::OnSignalsRef<'_> {
        self.inner.channel().on_closed()
    }

    #[cfg(target_os = "fuchsia")]
    fn signal_peer(
        &self,
        clear_mask: zx::Signals,
        set_mask: zx::Signals,
    ) -> Result<(), zx_status::Status> {
        use fidl::Peered;
        self.inner.channel().signal_peer(clear_mask, set_mask)
    }
}

impl MonitorControlHandle {}

#[must_use = "FIDL methods require a response to be sent"]
#[derive(Debug)]
pub struct MonitorWatchResponder {
    control_handle: std::mem::ManuallyDrop<MonitorControlHandle>,
    tx_id: u32,
}

/// Set the the channel to be shutdown (see [`MonitorControlHandle::shutdown`])
/// if the responder is dropped without sending a response, so that the client
/// doesn't hang. To prevent this behavior, call `drop_without_shutdown`.
impl std::ops::Drop for MonitorWatchResponder {
    fn drop(&mut self) {
        self.control_handle.shutdown();
        // Safety: drops once, never accessed again
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
    }
}

impl fidl::endpoints::Responder for MonitorWatchResponder {
    type ControlHandle = MonitorControlHandle;

    fn control_handle(&self) -> &MonitorControlHandle {
        &self.control_handle
    }

    fn drop_without_shutdown(mut self) {
        // Safety: drops once, never accessed again due to mem::forget
        unsafe { std::mem::ManuallyDrop::drop(&mut self.control_handle) };
        // Prevent Drop from running (which would shut down the channel)
        std::mem::forget(self);
    }
}

impl MonitorWatchResponder {
    /// Sends a response to the FIDL transaction.
    ///
    /// Sets the channel to shutdown if an error occurs.
    pub fn send(self, mut payload: &Snapshot) -> Result<(), fidl::Error> {
        let _result = self.send_raw(payload);
        if _result.is_err() {
            self.control_handle.shutdown();
        }
        self.drop_without_shutdown();
        _result
    }

    /// Similar to "send" but does not shutdown the channel if an error occurs.
    pub fn send_no_shutdown_on_err(self, mut payload: &Snapshot) -> Result<(), fidl::Error> {
        let _result = self.send_raw(payload);
        self.drop_without_shutdown();
        _result
    }

    fn send_raw(&self, mut payload: &Snapshot) -> Result<(), fidl::Error> {
        self.control_handle.inner.send::<Snapshot>(
            payload,
            self.tx_id,
            0x381ea392fef3667f,
            fidl::encoding::DynamicFlags::empty(),
        )
    }
}

mod internal {
    use super::*;

    impl MonitorOptions {
        #[inline(always)]
        fn max_ordinal_present(&self) -> u64 {
            0
        }
    }

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

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

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

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

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<MonitorOptions, D>
        for &MonitorOptions
    {
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<MonitorOptions>(offset);
            // Vector header
            let max_ordinal: u64 = self.max_ordinal_present();
            encoder.write_num(max_ordinal, offset);
            encoder.write_num(fidl::encoding::ALLOC_PRESENT_U64, offset + 8);
            // Calling encoder.out_of_line_offset(0) is not allowed.
            if max_ordinal == 0 {
                return Ok(());
            }
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = max_ordinal as usize * envelope_size;
            #[allow(unused_variables)]
            let offset = encoder.out_of_line_offset(bytes_len);
            let mut _prev_end_offset: usize = 0;

            Ok(())
        }
    }

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

        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let len = match fidl::encoding::decode_vector_header(decoder, offset)? {
                None => return Err(fidl::Error::NotNullable),
                Some(len) => len,
            };
            // Calling decoder.out_of_line_offset(0) is not allowed.
            if len == 0 {
                return Ok(());
            };
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = len * envelope_size;
            let offset = decoder.out_of_line_offset(bytes_len)?;
            // Decode the envelope for each type.
            let mut _next_ordinal_to_read = 0;
            let mut next_offset = offset;
            let end_offset = offset + bytes_len;

            // Decode the remaining unknown envelopes.
            while next_offset < end_offset {
                _next_ordinal_to_read += 1;
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                next_offset += envelope_size;
            }

            Ok(())
        }
    }

    impl Snapshot {
        #[inline(always)]
        fn max_ordinal_present(&self) -> u64 {
            if let Some(_) = self.http_active {
                return 4;
            }
            if let Some(_) = self.dns_active {
                return 3;
            }
            if let Some(_) = self.gateway_reachable {
                return 2;
            }
            if let Some(_) = self.internet_available {
                return 1;
            }
            0
        }
    }

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

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

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

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

    unsafe impl<D: fidl::encoding::ResourceDialect> fidl::encoding::Encode<Snapshot, D> for &Snapshot {
        unsafe fn encode(
            self,
            encoder: &mut fidl::encoding::Encoder<'_, D>,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            encoder.debug_check_bounds::<Snapshot>(offset);
            // Vector header
            let max_ordinal: u64 = self.max_ordinal_present();
            encoder.write_num(max_ordinal, offset);
            encoder.write_num(fidl::encoding::ALLOC_PRESENT_U64, offset + 8);
            // Calling encoder.out_of_line_offset(0) is not allowed.
            if max_ordinal == 0 {
                return Ok(());
            }
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = max_ordinal as usize * envelope_size;
            #[allow(unused_variables)]
            let offset = encoder.out_of_line_offset(bytes_len);
            let mut _prev_end_offset: usize = 0;
            if 1 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (1 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<bool, D>(
                self.internet_available
                    .as_ref()
                    .map(<bool as fidl::encoding::ValueTypeMarker>::borrow),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 2 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (2 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<bool, D>(
                self.gateway_reachable
                    .as_ref()
                    .map(<bool as fidl::encoding::ValueTypeMarker>::borrow),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 3 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (3 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<bool, D>(
                self.dns_active.as_ref().map(<bool as fidl::encoding::ValueTypeMarker>::borrow),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;
            if 4 > max_ordinal {
                return Ok(());
            }

            // Write at offset+(ordinal-1)*envelope_size, since ordinals are one-based and envelopes
            // are envelope_size bytes.
            let cur_offset: usize = (4 - 1) * envelope_size;

            // Zero reserved fields.
            encoder.padding(offset + _prev_end_offset, cur_offset - _prev_end_offset);

            // Safety:
            // - bytes_len is calculated to fit envelope_size*max(member.ordinal).
            // - Since cur_offset is envelope_size*(member.ordinal - 1) and the envelope takes
            //   envelope_size bytes, there is always sufficient room.
            fidl::encoding::encode_in_envelope_optional::<bool, D>(
                self.http_active.as_ref().map(<bool as fidl::encoding::ValueTypeMarker>::borrow),
                encoder,
                offset + cur_offset,
                depth,
            )?;

            _prev_end_offset = cur_offset + envelope_size;

            Ok(())
        }
    }

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

        unsafe fn decode(
            &mut self,
            decoder: &mut fidl::encoding::Decoder<'_, D>,
            offset: usize,
            mut depth: fidl::encoding::Depth,
        ) -> fidl::Result<()> {
            decoder.debug_check_bounds::<Self>(offset);
            let len = match fidl::encoding::decode_vector_header(decoder, offset)? {
                None => return Err(fidl::Error::NotNullable),
                Some(len) => len,
            };
            // Calling decoder.out_of_line_offset(0) is not allowed.
            if len == 0 {
                return Ok(());
            };
            depth.increment()?;
            let envelope_size = 8;
            let bytes_len = len * envelope_size;
            let offset = decoder.out_of_line_offset(bytes_len)?;
            // Decode the envelope for each type.
            let mut _next_ordinal_to_read = 0;
            let mut next_offset = offset;
            let end_offset = offset + bytes_len;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 1 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size =
                    <bool as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref =
                    self.internet_available.get_or_insert_with(|| fidl::new_empty!(bool, D));
                fidl::decode!(bool, D, val_ref, decoder, inner_offset, inner_depth)?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 2 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size =
                    <bool as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref =
                    self.gateway_reachable.get_or_insert_with(|| fidl::new_empty!(bool, D));
                fidl::decode!(bool, D, val_ref, decoder, inner_offset, inner_depth)?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 3 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size =
                    <bool as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.dns_active.get_or_insert_with(|| fidl::new_empty!(bool, D));
                fidl::decode!(bool, D, val_ref, decoder, inner_offset, inner_depth)?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;
            _next_ordinal_to_read += 1;
            if next_offset >= end_offset {
                return Ok(());
            }

            // Decode unknown envelopes for gaps in ordinals.
            while _next_ordinal_to_read < 4 {
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                _next_ordinal_to_read += 1;
                next_offset += envelope_size;
            }

            let next_out_of_line = decoder.next_out_of_line();
            let handles_before = decoder.remaining_handles();
            if let Some((inlined, num_bytes, num_handles)) =
                fidl::encoding::decode_envelope_header(decoder, next_offset)?
            {
                let member_inline_size =
                    <bool as fidl::encoding::TypeMarker>::inline_size(decoder.context);
                if inlined != (member_inline_size <= 4) {
                    return Err(fidl::Error::InvalidInlineBitInEnvelope);
                }
                let inner_offset;
                let mut inner_depth = depth.clone();
                if inlined {
                    decoder.check_inline_envelope_padding(next_offset, member_inline_size)?;
                    inner_offset = next_offset;
                } else {
                    inner_offset = decoder.out_of_line_offset(member_inline_size)?;
                    inner_depth.increment()?;
                }
                let val_ref = self.http_active.get_or_insert_with(|| fidl::new_empty!(bool, D));
                fidl::decode!(bool, D, val_ref, decoder, inner_offset, inner_depth)?;
                if !inlined && decoder.next_out_of_line() != next_out_of_line + (num_bytes as usize)
                {
                    return Err(fidl::Error::InvalidNumBytesInEnvelope);
                }
                if handles_before != decoder.remaining_handles() + (num_handles as usize) {
                    return Err(fidl::Error::InvalidNumHandlesInEnvelope);
                }
            }

            next_offset += envelope_size;

            // Decode the remaining unknown envelopes.
            while next_offset < end_offset {
                _next_ordinal_to_read += 1;
                fidl::encoding::decode_unknown_envelope(decoder, next_offset, depth)?;
                next_offset += envelope_size;
            }

            Ok(())
        }
    }
}