Struct ServerCapabilities 

pub struct ServerCapabilities {
    pub max_qos: QoS,
    pub retain_available: bool,
    pub max_packet_size: Option<u32>,
    pub topic_alias_max: u16,
    pub wildcard_sub_available: bool,
    pub sub_id_available: bool,
    pub shared_sub_available: bool,
    pub receive_max: u16,
    pub server_keep_alive: Option<u16>,
}

Server capabilities extracted from CONNACK properties (§3.2.2.3).

All fields default to the most permissive values defined by the spec.

Fields

max_qos: QoS

Maximum QoS the server supports (default: QoS::ExactlyOnce).

retain_available: bool

Whether the server supports retained messages (default: true).

max_packet_size: Option<u32>

Maximum packet size the server will accept. None means no limit beyond the protocol maximum (§3.2.2.3.6).

topic_alias_max: u16

Maximum topic alias value the server will accept (default: 0 = topic aliases not supported).

wildcard_sub_available: bool

Whether wildcard subscriptions are available (default: true).

sub_id_available: bool

Whether subscription identifiers are available (default: true).

shared_sub_available: bool

Whether shared subscriptions are available (default: true).

receive_max: u16

Receive Maximum: the maximum number of in-flight QoS > 0 publishes the server will accept (default: 65535, §3.2.2.3.3).

server_keep_alive: Option<u16>

Server-assigned keep-alive override. None means the client’s requested value was accepted (§3.2.2.3.14).

Trait Implementations

impl Clone for ServerCapabilities

fn clone(&self) -> ServerCapabilities

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ServerCapabilities

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

Formats the value using the given formatter.

impl Default for ServerCapabilities

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ServerCapabilities

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ServerCapabilities

impl Eq for ServerCapabilities

impl StructuralPartialEq for ServerCapabilities