networkextension / libkcp

FEC enhanced KCP session library for iOS/Android in C++

libkcp

FEC enhanced KCP client session library for iOS/Android, compatible with kcp-go.

Features

1. Optimized for Online Games.
2. Stream based interface, you can easily switch from your TCP based protocol to libkcp or dualstack.
3. FEC(Forward Error Correction) Support with Reed-Solomon Codes
4. Add iOS/macOs Framework and Test target
5. MAS app https://itunes.apple.com/us/app/a-big-t/id1114040100?l=zh&ls=1&mt=12 support kcptun use this lib

Usage

libkcp has been designed as a Frame-Driven library, the main loop was supposed as:

GameInit()
NetworkInit()
While (!isGameOver) Do      // e.g:  A 30FPS Game
       LibKCP.Read()
       LibKCP.Write()
       LibKCP.Update()
       Game.Logic()
       Game.Render()
       Wait(33ms)   // clock
End

The Read/Write/Update functions of libkcp are guaranteed to be non-blocking.
Please read kcp_test.cpp fec_test.cpp for library usage.

Demo

start echo server(golang)

$go get github.com/xtaci/kcp-go
$go run kcpserver.go

compile and run libkcp(Best with CLion), and watch output.

Caveats

1. Packet level encryption use CommonCrypto, dose not pass test,need test and debug

Troubleshooting

1. C++11 is required for compiling.