hopr_network_types::udp

Struct UdpStreamBuilder

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

Builder object for the ConnectedUdpStream.

If you wish to use defaults, do UdpStreamBuilder::default().build(addr).

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impl UdpStreamBuilder

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pub fn with_foreign_data_mode(self, mode: ForeignDataMode) -> Self

Defines the behavior when data from an unexpected source arrive into the socket. See ForeignDataMode for details.

Default is ForeignDataMode::Error.

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pub fn with_buffer_size(self, buffer_size: usize) -> Self

The size of the UDP receive buffer.

This size must be at least the size of the MTU, otherwise the unread UDP data that does not fit this buffer will be discarded.

Default is 2048.

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pub fn with_queue_size(self, queue_size: usize) -> Self

Size of the TX/RX queue that dispatches data of reads from/writings to the sockets.

This an important back-pressure mechanism when dispatching received data from fast senders. Reduces the maximum memory consumed by the object, which is given by: buffer_size * queue_size

Default is unbounded.

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pub fn with_receiver_parallelism<T: Into<UdpStreamParallelism>>( self, parallelism: T, ) -> Self

Sets how many parallel receiving sockets should be bound.

Has no effect on non-Linux machines. See UdpStreamParallelism for details.

Default is 1.

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pub fn with_sender_parallelism<T: Into<UdpStreamParallelism>>( self, parallelism: T, ) -> Self

Sets how many parallel sending sockets should be bound.

Has no effect on non-Linux machines. See UdpStreamParallelism for details.

Default is 1.

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pub fn with_counterparty(self, counterparty: SocketAddr) -> Self

Sets the expected counterparty for data sent/received by the UDP sockets.

If not specified, the counterparty is determined from the first packet received. However, no data can be sent up until this point. Therefore, the value must be set if data are sent first rather than received. If data is expected to be received first, the value does not need to be set.

See ConnectedUdpStream and ForeignDataMode for details.

Default is none.

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pub fn build<A: ToSocketAddrs>(self, bind_addr: A) -> Result<ConnectedUdpStream>

Builds the ConnectedUdpStream with UDP socket(s) bound to bind_addr.

The number of RX sockets bound is determined by receiver parallelism, and similarly, the number of TX sockets bound is determined by sender parallelism. On non-Linux platforms, only a single receiver and sender will be bound, regardless of the above.

The returned instance is always ready to receive data. It is also ready to send data if the counterparty has been set.

If bind_addr yields multiple addresses, binding will be attempted with each of the addresses until one succeeds. If none of the addresses succeed in binding the socket(s), the AddrNotAvailable error is returned.

Note that wildcard addresses (such as 0.0.0.0) are not considered as multiple addresses, and such socket(s) will bind to all available interfaces at the system level.

Trait Implementations§

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impl Clone for UdpStreamBuilder

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fn clone(&self) -> UdpStreamBuilder

Returns a copy 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 UdpStreamBuilder

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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 UdpStreamBuilder

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fn default() -> Self

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

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