librqbit_utp

Struct SocketOpts

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pub struct SocketOpts {
Show 13 fields
    pub link_mtu: Option<NonZeroUsize>,
    pub vsock_rx_bufsize_bytes: Option<NonZeroUsize>,
    pub vsock_tx_bufsize_bytes_initial: Option<NonZeroUsize>,
    pub vsock_tx_bufsize_bytes_max: Option<NonZeroUsize>,
    pub disable_nagle: bool,
    pub congestion: CongestionConfig,
    pub parent_span: Option<Id>,
    pub cancellation_token: CancellationToken,
    pub max_retransmissions: Option<NonZeroUsize>,
    pub remote_inactivity_timeout: Option<Duration>,
    pub max_live_vsocks: Option<NonZeroUsize>,
    pub dont_wait_for_lastack: bool,
    pub mtu_probe_max_retransmissions: Option<usize>,

}

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§link_mtu: Option<NonZeroUsize>§vsock_rx_bufsize_bytes: Option<NonZeroUsize>

Virtual socket read buffer. Serves several purposes:

  • temporary storage before the data is read back to the user’s application
  • reassembling out of order packets
  • advertising recv window to the other side (sender). The sender will not send more data than this and might thus stall. Ideal value for throughput should be BDP (bandwidth delay product).
§vsock_tx_bufsize_bytes_initial: Option<NonZeroUsize>

Virtual socket write buffer. Serves several purposes:

  • how many bytes can store without blocking writer.
  • how many bytes can store without receiving an ACK.

This should be governed by BDP (bandwidth delay product). If it’s too low, the pipeline would be stalling. If it’s too high, every VSock would take too much memory.

§vsock_tx_bufsize_bytes_max: Option<NonZeroUsize>§disable_nagle: bool

Disable Nagle’s algorithm

§congestion: CongestionConfig

Congestion control configuration.

§parent_span: Option<Id>

The parent span for spawned tokio tasks. If not provided, will use root span.

§cancellation_token: CancellationToken

If provided, this can be used to abruptly terminate all spawned tasks.

§max_retransmissions: Option<NonZeroUsize>

How many times to retry retransmitting a packet before terminating the virtual socket.

§remote_inactivity_timeout: Option<Duration>

How many seconds to wait for incoming data before terminating the connection.

§max_live_vsocks: Option<NonZeroUsize>

How many virtual sockets to have at the same time. Each vsock consumes resources (memory, tokio tasks).

§dont_wait_for_lastack: bool

If true, will wait for ACK of FIN. By default we don’t wait as it’s not required for torrents.

§mtu_probe_max_retransmissions: Option<usize>

How many times should the MTU probes be retransmitted. By default it’s 1, so that MTU probing can handle a bit of packet loss. If it’s 0, we would mark RTO’ed probes as failed sooner and thus perf would be better.

Trait Implementations§

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impl Clone for SocketOpts

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fn clone(&self) -> SocketOpts

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 SocketOpts

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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 Default for SocketOpts

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fn default() -> SocketOpts

Returns the “default value” for a type. Read more

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