Struct UdpAssoc 

pub struct UdpAssoc {
    pub socket: Arc<UdpSocket>,
    pub peer: SocketAddr,
    pub first_packet: Bytes,
    pub quic: Option<QuicAssocId>,
}

Fields

socket: Arc<UdpSocket>

Physical listener socket — vane-owned, shared via Arc with the listener’s recv loop. The fetch sends responses back to the peer through this socket; the listener demuxes inbound datagrams to the per-session forwarder via the dispatch table. See spec/architecture/06-l4.md § UDP socket multiplexing.

peer: SocketAddr

first_packet: Bytes

Datagram that triggered the cold-path FlowGraph entry. The L4Forward fetch sends this verbatim as the upstream session’s first packet so no inbound bytes are lost between dispatch table miss and forwarder registration.

quic: Option<QuicAssocId>

None on the cold-path entry; populated only when an existing QUIC session takes over (post-MVP — see spec/architecture/06-l4.md § udp_dispatch).