Struct RouterPort 

pub struct RouterPort<T: TransportPort = AnyTransport> {
    pub transport: T,
    pub network_number: u16,
}

A router port: a transport bound to a specific BACnet network number.

BACnetRouter::start calls TransportPort::prepare_for_routing on each port’s transport before it starts it, so an MS/TP port takes and sends extended frames whatever its MstpConfig says: Clause 9.3 requires them of a routing node. Once the transport has started, it reads TransportPort::max_npdu, and answers an NPDU too long for the port with reject reason 4 (#1665). It follows the limit’s changes after that, for a transport that publishes them (TransportPort::max_npdu_changes, #1696).

T defaults to AnyTransport, so RouterPort alone names a port of a router that mixes link types; RouterPort<BipTransport> and the like name one of a router whose ports share a concrete transport.

Fields

transport: T

The transport for this port.

network_number: u16

The network number assigned to this port: 1 to 65534. BACnetRouter::start refuses 0, which is no network, and 0xFFFF, the global broadcast DNET, which can’t be the SNET the router puts in what it relays from the port (Clause 6.2.2.1).