Struct SocketOptions 

#[non_exhaustive]
pub struct SocketOptions {
    pub reuse_address: bool,
    pub reuse_port: bool,
    pub multicast_if_v4: Option<Ipv4Addr>,
    pub multicast_loop_v4: Option<bool>,
}

Socket-level options applied by TransportFactory::bind.

The fields mirror the BSD / socket2 options that simple-someip needs for its Service Discovery socket layout. A default-constructed SocketOptions requests a plain unicast socket.

#[non_exhaustive] so additional knobs (TTL, buffer sizes) can be introduced later without breaking downstream construction.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

reuse_address: bool

Enable SO_REUSEADDR. Required on the SD port 30490 when more than one SOME/IP endpoint runs on the same interface; on Linux, callers binding 30490 should set BOTH this and Self::reuse_port because Linux ties multicast-group membership to the SO_REUSEPORT group rather than SO_REUSEADDR alone — without REUSEPORT a second binder may fail or silently steal datagrams.

reuse_port: bool

Enable SO_REUSEPORT where supported (Linux, BSD). Ignored on platforms that do not expose it. See Self::reuse_address for the Linux-specific reason both are required on the SD socket.

multicast_if_v4: Option<Ipv4Addr>

Outbound multicast interface (IP_MULTICAST_IF). None lets the backend choose.

multicast_loop_v4: Option<bool>

Loop multicast traffic back to sockets on the same host (IP_MULTICAST_LOOP). Tri-state:

• None — the OS default applies (Linux: enabled by default). Use this when you have no opinion on loopback.
• Some(true) — explicitly enable. Required when running a SOME/IP server and client on the same machine for testing.
• Some(false) — explicitly disable.

Backends call setsockopt(IP_MULTICAST_LOOP) only for Some(_). A previous bool-typed field caused multicast_if_v4: Some(_), multicast_loop_v4: false to silently turn loopback OFF on hosts where the OS default was ON, even when the caller had no opinion on loopback.

Implementations

impl SocketOptions

pub const fn new() -> Self

A plain unicast socket with no multicast configuration.

Trait Implementations

impl Clone for SocketOptions

fn clone(&self) -> SocketOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SocketOptions

impl Debug for SocketOptions

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

Formats the value using the given formatter.

impl Default for SocketOptions

fn default() -> Self

Returns the “default value” for a type.