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Stock Ticker

Simple TCP protocol showing variable-size PDUs with a length header.

Format

1 byte 1-4 bytes 4 bytes
unit8 char[] float32 (big-endian)
Symbol length Ticker symbol Current price in USD

Files

  • temperature_data.py: Python script for sending and receiving protocol data (no requirements, should "just work" with Python 3)
  • temperature_client.lua: Wireshark dissector for this protocol, registers for TCP port 5678
  • dump-singles.pcap: Example capture file, one PDU per TCP segment
  • dump-doubles.pcap: Example capture file, two PDUs per TCP segment
  • dump-out-of-phase.pcap: Example capture file, two PDUs halves per TCP segment (each PDU continuing in the next segment)
  • dump-randomly-segmented.pcap: Example capture file, randomly segmented PDUs, no clear relation to TCP segments