dlemel8 / network_parser_combinator

POC of parsing network protocols using parser combinators pattern

Network Parser Combinator

This repo contains parser combinator framework and use it to partially parse some TLS protocol variants.

Parser Combinators

A parser is a function that take bytes and return a result.
Parsers are defined by a trait and implemented by closures.

A combinator is a function that take other parsers and return new parser.
Combinators are implemented as methods with default implementation on parser trait.

Network Protocols

Using parsers and combinators, network protocols can be parsed.
All supported protocols can be parsed via a single library function that take packet(s) payload and return parsed objects.

Currently, tested protocols are:

• TLS 1.2
• TLS 1.3
• DTLS 1.2

Examples

There is a single example of multi-threaded executable that dumps packets of a pcap file.
The main thread is sending packets to parse and receiving parsed packets to worker threads via channels.
Parsed packets are temporarily stored in a binary heap until they get printed.