Data

tor_cell::relaycell::msg

Struct Data 

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pub struct Data { /* private fields */ }
Expand description

A Data message represents data sent along a stream.

Upon receiving a Data message for a live stream, the client or exit sends that data onto the associated TCP connection.

These messages hold between 1 and Data::MAXLEN bytes of data each; they are the most numerous messages on the Tor network.

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impl Data

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pub const MAXLEN_V0: usize = 498usize

The longest allowable body length for a single V0 data cell.

Relay command (1) + ‘Recognized’ (2) + StreamID (2) + Digest (4) + Length (2) = 11

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pub const MAXLEN_V1: usize = 488usize

The longest allowable body length for a single V1 data cell.

Tag (16) + Relay command (1) + Length (2) + StreamID (2) = 21

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pub const MAXLEN: usize = 498usize

The longest allowable body length for any data cell.

Note that this value is too large to fit into a v1 relay cell; see MAXLEN_V1 if you are making a v1 data cell.

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pub fn new(inp: &[u8]) -> Result<Self>

Construct a new data cell.

Returns an error if inp is longer than Data::MAXLEN bytes.

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pub fn try_split_from( version: RelayCellFormat, inp: &[u8], ) -> Option<(Self, &[u8])>

Construct a new data cell, taking as many bytes from inp as possible.

Return the data cell, and a slice holding any bytes that wouldn’t fit (if any).

Returns None if the input was empty.

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pub fn max_body_len(format: RelayCellFormat) -> usize

Return the maximum allowable body length for a Data message using the provided format.

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impl AsRef<[u8]> for Data

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fn as_ref(&self) -> &[u8] ⓘ

Converts this type into a shared reference of the (usually inferred) input type.
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impl Body for Data

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fn decode_from_reader(r: &mut Reader<'_>) -> Result<Self>

Decode a relay cell body from a provided reader.
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fn encode_onto<W: Writer + ?Sized>(self, w: &mut W) -> EncodeResult<()>

Encode the body of this cell into the end of a writer.
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impl Clone for Data

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fn clone(&self) -> Data

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Data

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl From<Data> for AnyRelayMsg

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fn from(m: Data) -> AnyRelayMsg

Converts to this type from the input type.
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impl From<Data> for Vec<u8>

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fn from(data: Data) -> Vec<u8> ⓘ

Converts to this type from the input type.
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impl HasMemoryCostStructural for Data

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fn indirect_memory_cost(&self, et: EnabledToken) -> usize

Memory cost of data stored out-of-line Read more
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impl RelayMsg for Data

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fn cmd(&self) -> RelayCmd

Return the stream command associated with this message.
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fn encode_onto<W: Writer + ?Sized>(self, w: &mut W) -> EncodeResult<()>

Encode the body of this message, not including command or length
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fn decode_from_reader(cmd: RelayCmd, r: &mut Reader<'_>) -> Result<Self>

Extract the body of a message with command cmd from reader r.
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impl TryFrom<AnyRelayMsg> for Data

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type Error = Error

The type returned in the event of a conversion error.
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fn try_from(msg: AnyRelayMsg) -> Result<Data>

Performs the conversion.

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impl Freeze for Data

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impl RefUnwindSafe for Data

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impl Send for Data

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impl Sync for Data

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impl Unpin for Data

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impl UnwindSafe for Data

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Views self as an immutable bit-slice region with the O ordering.
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Attempts to view self as an immutable bit-slice region with the O ordering. Read more
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes