Struct MessageHeader 

pub struct MessageHeader {
    pub service_id: ServiceId,
    pub method_id: MethodId,
    pub instance_id: InstanceId,
    pub session_id: u16,
    pub message_type: MessageType,
    pub return_code: ReturnCode,
}

SOME/IP message header carrying routing metadata.

Every message exchanged over a Transport is paired with a header that identifies the target service, method, and instance. The transport layer uses this information to route the message and correlate request/response pairs via session_id.

Fields

service_id: ServiceId

Target service identifier.

method_id: MethodId

Target method or event identifier.

instance_id: InstanceId

Target service instance.

session_id: u16

Session identifier for request/response correlation. Transports typically assign this automatically; set to 0 in outgoing calls and let the transport fill it in.

message_type: MessageType

Discriminates request, response, notification, and error frames.

return_code: ReturnCode

SOME/IP return code (meaningful in responses and errors).

Trait Implementations

impl Clone for MessageHeader

fn clone(&self) -> MessageHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MessageHeader

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

Formats the value using the given formatter.