ColumnLynx makes use of both TCP and UDP. TCP is used for the initial handshake and commands, which UDP is used for actual packet transmission.

It operates on port 48042 for both TCP and UDP.

Packet Structure

TCP Packets

TCP Packets generally follow the structure Packet ID + Data

Packet ID

The Packet ID is an 8 bit unsigned integer that is predefined from either the Client to Server or Server to Client enum set, however they are uniquely numbered as to not collide with each other.

Server to Client IDs are always below 0xA0 (exclusive) and Client to Server IDs are always above 0xA0 (exclusive). 0xFE and OxFF are shared for GRACEFUL_DISCONNECT and KILL_CONNECTION respectively.

Data

The data section is unspecified. It may change depending on the Packet ID. It is encoded as a raw byte array

UDP Packets

WIP, fill in later

Legal

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.

DcruBro is the online pseudonym of Jonas Korene Novak. Both refer to the same individual and may be used interchangeably for copyright attribution purposes.

Licensing

This project includes the ASIO C++ Library, distributed under the Boost Software License, Version 1.0.