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fast, simple packet creation / parsing, with definitions for the basic TCP/IP protocols

Project description

Travis-CI Build Status Coverage Status PyPI Wheel Supported versions Supported implementations


pip install dpkt

Recent Stuff

[2021-02-07] Released 1.9.5, thanks a bunch to all contributors but mostly to @crocogorical for doing most of the work :)

1.9.5 Changelog:
  • New example showing how to process truncated DNS packets (examples/
  • Corrected typo in BGP.notification attribute.
  • BGP.Update.Attribute.MPReachNLRI.SNPA now inherits from dpkt.Packet.
  • Byteorder is now specified when packing GRE optional fields.
  • #517: Improvement to Radiotap class, supporting multi-byte and misaligned flags fields. Endianness is now enforced.
  • Github issue template added for bug reporting.
  • Compliance with flake8 formatting.
  • method now returns time in UTC, instead of local.
  • Allow multiple InterfaceDescriptionBlocks with pcapng.Writer.
  • SCTP decoder DATA chunk padding aligned to 4-bytes, and improved handling of .data field.
  • IEEE80211 DELBA frame now works on big and little-endian architectures.
  • Introduce compat.ntole which converts from network byte order to little-endian byte order, regardless of host endianness.
  • Ethernet class now attempts to unpack the padding and trailer if present.
  • Added anonymous property to cipher suites, which returns True if the cipher suite starts with ‘anon’.
  • Added pfs (Perfect Forward Secrecy) and aead (Authenticated Encryption with Additional Data) properties to cipher suites.
  • Added old CHACHA20-POLY1305 related cipher suites to TLS CipherSuite list.
  • Remove redundant num_compression_methods from TLSClientHello
  • Testing improved from 90% coverage to over 99%.


This code is based on dpkt code lead by Dug Song and is now being maintained and improved by an extended set of contributors and developers.


BSD 3-Clause

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