47 lines
1.5 KiB
Rust
47 lines
1.5 KiB
Rust
use super::Endpoint;
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use std::error::Error;
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pub trait Reader<E: Endpoint>: Send + Sync {
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type Error: Error;
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fn read(&self, buf: &mut [u8]) -> Result<(usize, E), Self::Error>;
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}
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pub trait Writer<E: Endpoint>: Send + Sync + 'static {
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type Error: Error;
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fn write(&self, buf: &[u8], dst: &mut E) -> Result<(), Self::Error>;
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}
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pub trait UDP: Send + Sync + 'static {
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type Error: Error;
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type Endpoint: Endpoint;
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/* Until Rust gets type equality constraints these have to be generic */
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type Writer: Writer<Self::Endpoint>;
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type Reader: Reader<Self::Endpoint>;
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}
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/// On platforms where fwmark can be set and the
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/// implementation can bind to a new port during later configuration (UAPI support),
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/// this type provides the ability to set the fwmark and close the socket (by dropping the instance)
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pub trait Owner: Send {
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type Error: Error;
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fn get_port(&self) -> u16;
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fn set_fwmark(&mut self, value: Option<u32>) -> Result<(), Self::Error>;
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}
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/// On some platforms the application can itself bind to a socket.
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/// This enables configuration using the UAPI interface.
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pub trait PlatformUDP: UDP {
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type Owner: Owner;
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/// Bind to a new port, returning the reader/writer and
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/// an associated instance of the owner type, which closes the UDP socket upon "drop"
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/// and enables configuration of the fwmark value.
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#[allow(clippy::type_complexity)]
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fn bind(port: u16) -> Result<(Vec<Self::Reader>, Self::Writer, Self::Owner), Self::Error>;
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}
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