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1.1 Packet format ¶

• Header:

  32 bits	serial number
  16 bits	sequence position
  16 bits	sequence length
  32 bits	packet length (including header)

• Data: (packet_length - 12) bytes of information

• Packets have a fixed maximum size (4k).
• Packets a grouped together to form random length messages. The sequence length refers to how many packets comprise the message, and each packet is tagged with its position in that sequence.
• All packets in the same message have the same serial number.
• Messages are built up as their constituent packets arrive. It should be possible to interleave the packets of different messages and still have the individual messages be constructed properly.
• It is tacitly assumed that packets arrive in their proper sequence order.
• A packet with a sequence position/length field denoting [0 of 0] is a cancellation packet. The message having that serial number should be discarded.

• Data format