Struct TcpOptsSupport 

pub struct TcpOptsSupport {
    pub nodelay: bool,
    pub keepalive: bool,
    pub keepalive_interval: bool,
    pub keepalive_retries: bool,
    pub bind_device: bool,
    pub user_timeout: bool,
    pub local_address: bool,
    pub send_buffer_size: bool,
    pub recv_buffer_size: bool,
    pub reuse_address: bool,
}

Which of TcpOpts’ six fields a runtime can actually apply.

One bool per field of TcpOpts, not a count and not a bitflags crate: the error a caller gets has to name the option it asked for, and a field-per-field mirror is the only shape that can.

Fields

nodelay: bool

keepalive: bool

keepalive_interval: bool

keepalive_retries: bool

bind_device: bool

SO_BINDTODEVICE, which exists on Linux, Android and Fuchsia and nowhere else — so a runtime that sets this must decide it per target rather than in one constant. TcpOptsSupport::ALL is still literally every field, and is therefore no longer a value any real runtime can claim on every platform it builds for.

user_timeout: bool

TCP_USER_TIMEOUT, Linux/Android/Fuchsia/Cygwin — the same per-target rule as bind_device.

local_address: bool

send_buffer_size: bool

recv_buffer_size: bool

reuse_address: bool

Implementations

impl TcpOptsSupport

pub const ALL: Self

Everything applied — what a runtime that hands the whole set to a socket2::Socket says. Both shipped runtimes do exactly that.

pub const NONE: Self

Nothing applied — the default for TcpConnect::APPLIES, and the conservative base a runtime turns individual fields on from.

Trait Implementations

impl Clone for TcpOptsSupport

fn clone(&self) -> TcpOptsSupport

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for TcpOptsSupport

impl Debug for TcpOptsSupport

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

Formats the value using the given formatter.

impl Eq for TcpOptsSupport

impl PartialEq for TcpOptsSupport

fn eq(&self, other: &TcpOptsSupport) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TcpOptsSupport