struct view approach

example.js

var IPAddress = new StructType({
  f0: uint8,
  f1: uint8,
  f2: uint8,
  f3: uint8
});

var Packet = new StructType({ addr: IPAddress, ... });

var PacketArray = new ArrayType(Packet);
var lotsOfPackets = new PacketArray(LOTS);

for (let p of lotsOfPackets.cursor("addr")) {
  ...
}

struct-view.txt

+------------+           +----------------------+
|            |---------->|                      |
| StructView |           | StructView.prototype |
|            |<----------|                      |
+------------+           +----------------------+
                                     ^
                                     |
                                     |
                          +---------------------+
                          |                     |
                          | p                   |
                          |                     |
                          +---------------------+