namespace hmmmm.stream;

enum StreamMode: byte {
    mode_read  = 0,
    mode_write = 1,
}

// Client → Server: subscribe to a memory region.
table StreamRegRequest {
    device_id: uint32;   // from DeviceIdMappingNotif
    seg_id:    uint32;   // from DeviceIdMappingNotif
    offset:    uint32;   // start offset within segment, in bytes
    length:    uint32;   // region length, in bytes
    mode:      StreamMode;
}

// Client → Server: cancel a stream subscription.
// No confirmation is sent by the server.
table StreamDeregRequest {
    stream_id: uint32;
}

// Server → Client: subscription confirmed, stream_id assigned.
// Echoes the original request fields for client-side reconciliation.
table StreamRegConfirm {
    stream_id: uint32;
    device_id: uint32;
    seg_id:    uint32;
    offset:    uint32;
    length:    uint32;
    mode:      StreamMode;
}