kcp-go is a full-featured Reliable-UDP library for golang. It provides reliable, ordered, and error-checked delivery of a stream of octets between applications running on hosts communicating over an IP network.
- Optimized for Online Games, Audio/Video Streaming.
- Compatible with skywind3000's C version with optimizations.
- Cache friendly and Memory optimized design in golang.
- Compatible with net.Conn and net.Listener.
- FEC(Forward Error Correction) Support with Reed-Solomon Codes
- Packet level encryption support with AES, TEA, 3DES, Blowfish, Cast5, Salsa20, etc. in CFB mode.
Control messages like SYN/FIN/RST in TCP are not defined in KCP, you need some keepalive mechanims in the application-level. a real world example is to use some multiplexing protocol over session, such as smux, see kcptun for example.
For complete documentation, see the associated Godoc.
Client: full demo
kcpconn, err := kcp.DialWithOptions("192.168.0.1:10000", nil, 10, 3)Server: full demo
lis, err := kcp.ListenWithOptions(":10000", nil, 10, 3) 型号名称： MacBook Pro
型号标识符： MacBookPro12,1
处理器名称： Intel Core i5
处理器速度： 2.7 GHz
处理器数目： 1
核总数： 2
L2 缓存（每个核）： 256 KB
L3 缓存： 3 MB
内存： 8 GB
$ go test -run Speed
new client 127.0.0.1:61165
total recv: 16777216
time for 16MB rtt with encryption 570.41176ms
&{BytesSent:33554432 BytesReceived:33554432 MaxConn:2 ActiveOpens:1 PassiveOpens:1 CurrEstab:1 InErrs:0 InCsumErrors:0 InSegs:42577 OutSegs:42641 OutBytes:48111336 RetransSegs:92 FastRetransSegs:92 LostSegs:0 RepeatSegs:0 FECRecovered:1 FECErrs:0 FECSegs:8514}
PASS
ok github.com/xtaci/kcp-go 0.600s
- https://github.com/xtaci/kcptun
- https://github.com/getlantern/lantern
- https://github.com/smallnest/rpcx
- https://github.com/xtaci/libkcp -- FEC enhanced KCP session library for iOS/Android in C++
- https://github.com/skywind3000/kcp -- A Fast and Reliable ARQ Protocol
- https://github.com/klauspost/reedsolomon -- Reed-Solomon Erasure Coding in Go