Table

netstack3_filter

Struct Table 

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pub struct Table<I: IpExt, E, BT: FilterBindingsTypes> { /* private fields */ }
Expand description

Implements a connection tracking subsystem.

The E parameter is for external data that is stored in the [Connection] struct and can be extracted with the [Connection::external_data()] function.

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impl<I: IpExt, E, BT: FilterBindingsTypes> Table<I, E, BT>

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pub fn contains_tuple(&self, tuple: &Tuple<I>) -> bool

Returns whether the table contains a connection for the specified tuple.

This is for NAT to determine whether a generated tuple will clash with one already in the map. While it might seem inefficient, to require locking in a loop, taking an uncontested lock is going to be significantly faster than the RNG used to allocate NAT parameters.

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pub fn get_connection(&self, tuple: &Tuple<I>) -> Option<Connection<I, E, BT>>

Returns a [Connection] for the flow indexed by tuple, if one exists.

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pub fn num_entries(&self) -> usize

Returns the number of entries in the table.

NOTE: This is usually twice the number of connections, but self-connected sockets will only have a single entry.

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pub fn remove_connection( &mut self, tuple: &Tuple<I>, ) -> Option<Connection<I, E, BT>>

Removes the [Connection] for the flow indexed by tuple, if one exists, and returns it to the caller.

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impl<I: IpExt, E: Inspectable, BT: FilterBindingsTypes> Inspectable for Table<I, E, BT>

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fn record<Inspector: Inspector>(&self, inspector: &mut Inspector)

Records this value into inspector.

Auto Trait Implementations§

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impl<I, E, BT> !Freeze for Table<I, E, BT>

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impl<I, E, BT> RefUnwindSafe for Table<I, E, BT>

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impl<I, E, BT> Send for Table<I, E, BT>
where E: Sync + Send,

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impl<I, E, BT> Sync for Table<I, E, BT>
where E: Sync + Send,

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impl<I, E, BT> Unpin for Table<I, E, BT>
where <BT as TimerBindingsTypes>::Timer: Unpin, <I as Ip>::Addr: Unpin,

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impl<I, E, BT> UnwindSafe for Table<I, E, BT>

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<CC, BC, Meta> RecvFrameContext<Meta, BC> for CC
where Meta: ReceivableFrameMeta<CC, BC>,

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fn receive_frame<B>(&mut self, bindings_ctx: &mut BC, metadata: Meta, frame: B)
where B: BufferMut + Debug,

Receive a frame. Read more
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impl<CC, BC, Meta> SendFrameContext<BC, Meta> for CC
where Meta: SendableFrameMeta<CC, BC>,

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fn send_frame<S>( &mut self, bindings_ctx: &mut BC, metadata: Meta, frame: S, ) -> Result<(), ErrorAndSerializer<SendFrameErrorReason, S>>
where S: Serializer, <S as Serializer>::Buffer: BufferMut,

Send a frame. Read more
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impl<BC, S, Meta, DeviceId> SendableFrameMeta<FakeCoreCtx<S, Meta, DeviceId>, BC> for Meta

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fn send_meta<SS>( self, core_ctx: &mut FakeCoreCtx<S, Meta, DeviceId>, bindings_ctx: &mut BC, frame: SS, ) -> Result<(), ErrorAndSerializer<SendFrameErrorReason, SS>>
where SS: Serializer, <SS as Serializer>::Buffer: BufferMut,

Sends this frame metadata to the provided contexts.
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impl<Meta, BC> SendableFrameMeta<FakeFrameCtx<Meta>, BC> for Meta

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fn send_meta<S>( self, core_ctx: &mut FakeFrameCtx<Meta>, _bindings_ctx: &mut BC, frame: S, ) -> Result<(), ErrorAndSerializer<SendFrameErrorReason, S>>
where S: Serializer, <S as Serializer>::Buffer: BufferMut,

Sends this frame metadata to the provided contexts.
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impl<Id, CC, BC> TimerHandler<BC, Id> for CC
where BC: TimerBindingsTypes, Id: HandleableTimer<CC, BC>,

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fn handle_timer( &mut self, bindings_ctx: &mut BC, dispatch: Id, timer: <BC as TimerBindingsTypes>::UniqueTimerId, )

Handle a timer firing. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<L, T> UnlockedAccess<L> for T
where L: UnlockedAccessMarkerFor<T>,

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type Data = <L as UnlockedAccessMarkerFor<T>>::Data

The type of state being accessed.
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type Guard<'l> = &'l <L as UnlockedAccessMarkerFor<T>>::Data where T: 'l

A guard providing read access to the data.
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fn access(&self) -> <T as UnlockedAccess<L>>::Guard<'_>

How to access the state.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<B, A> LockBefore<B> for A
where B: LockAfter<A>,