https://github.com/adrianosela/rdtp

[WIP] A cross OS transport layer service implemented as a daemon process
https://github.com/adrianosela/rdtp

Last synced: 10 months ago
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[WIP] A cross OS transport layer service implemented as a daemon process

• Host: GitHub
• URL: https://github.com/adrianosela/rdtp
• Owner: adrianosela
• License: mpl-2.0
• Created: 2020-01-09T20:47:03.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2021-08-02T19:06:52.000Z (over 4 years ago)
• Last Synced: 2024-06-20T00:37:42.574Z (over 1 year ago)
• Language: Go
• Homepage:
• Size: 1.13 MB
• Stars: 3
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# rdtp - Reliable Data Transport Protocol

[![Go Report Card](https://goreportcard.com/badge/github.com/adrianosela/rdtp)](https://goreportcard.com/report/github.com/adrianosela/rdtp)

[![Documentation](https://godoc.org/github.com/adrianosela/rdtp?status.svg)](https://godoc.org/github.com/adrianosela/rdtp)

[![license](https://img.shields.io/github/license/adrianosela/rdtp.svg)](https://github.com/adrianosela/rdtp/blob/master/LICENSE)

**[IPPROTO_RDTP = 0x9D]**

Specification of a reliable transport layer protocol to be used over IP networks, along a simplistic and modular implementation in Go.

## To-Dos:

* Reliability

  * Polish socket dialer

  * Implement socket listener

  * Implement selective acknowledgements

* Flow Control

  * Receiver window in header

## Based on:

* UDP - User Datagram Protocol [[RFC]](https://tools.ietf.org/html/rfc768)

* TCP - Transmission Control Protocol [[RFC]](https://tools.ietf.org/html/rfc793)

## Header Format

```

 0      7 8     15 16    23 24    31

+--------+--------+--------+--------+

|     Src. Port   |    Dst. Port    |

+--------+--------+--------+--------+

|      Length     |    Checksum     |

+--------+--------+--------+--------+

|          Sequence Number          |

+--------+-----------------+--------+

|       Acknowledgement Number      |

+--------+-----------------+--------+

|  Flags |                          |

+--------+                          |

|             ( Data )              |

+               ....                +

```

## Important Notes: 

The value for the underlying IP header's "Protocol" field must be set to 0x9D (157 -- currently [Unassigned](https://en.wikipedia.org/wiki/List_of_IP_protocol_numbers))

## Over the Wire

Here's a [Wireshark](https://www.wireshark.org/) capture of an RDTP packet over the wire:

![](./.docs/img/cap0.png)

(The highlighted bytes are the RDTP header + payload)