forked from esrrhs/go-engine
/
kcpconn.go
133 lines (110 loc) · 2.58 KB
/
kcpconn.go
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package conn
import (
"context"
"errors"
"github.com/xtaci/kcp-go"
"github.com/xtaci/smux"
"net"
)
type KcpConn struct {
session *smux.Session
stream *smux.Stream
listener *kcp.Listener
info string
}
func (c *KcpConn) Name() string {
return "kcp"
}
func (c *KcpConn) Read(p []byte) (n int, err error) {
if c.stream != nil {
return c.stream.Read(p)
}
return 0, errors.New("empty conn")
}
func (c *KcpConn) Write(p []byte) (n int, err error) {
if c.stream != nil {
return c.stream.Write(p)
}
return 0, errors.New("empty conn")
}
func (c *KcpConn) Close() error {
if c.session != nil {
return c.session.Close()
} else if c.listener != nil {
return c.listener.Close()
}
return nil
}
func (c *KcpConn) Info() string {
if c.info != "" {
return c.info
}
if c.session != nil {
c.info = c.session.LocalAddr().String() + "<--kcp-->" + c.session.RemoteAddr().String()
} else if c.listener != nil {
c.info = "kcp--" + c.listener.Addr().String()
} else {
c.info = "empty kcp conn"
}
return c.info
}
func (c *KcpConn) Dial(dst string) (Conn, error) {
var lc net.ListenConfig
if gControlOnConnSetup != nil {
lc.Control = gControlOnConnSetup
}
laddr := &net.UDPAddr{}
pconn, err := lc.ListenPacket(context.Background(), "udp", laddr.String())
if err != nil {
return nil, err
}
conn, err := kcp.NewConn(dst, nil, 0, 0, pconn.(*net.UDPConn))
if err != nil {
return nil, err
}
c.setParam(conn)
session, err := smux.Client(conn, nil)
if err != nil {
return nil, err
}
stream, err := session.OpenStream()
if err != nil {
return nil, err
}
return &KcpConn{session: session, stream: stream}, nil
}
func (c *KcpConn) Listen(dst string) (Conn, error) {
listener, err := kcp.Listen(dst)
if err != nil {
return nil, err
}
listener.(*kcp.Listener).SetReadBuffer(4 * 1024 * 1024)
listener.(*kcp.Listener).SetWriteBuffer(4 * 1024 * 1024)
listener.(*kcp.Listener).SetDSCP(46)
return &KcpConn{listener: listener.(*kcp.Listener)}, nil
}
func (c *KcpConn) Accept() (Conn, error) {
conn, err := c.listener.Accept()
if err != nil {
return nil, err
}
c.setParam(conn.(*kcp.UDPSession))
session, err := smux.Server(conn, nil)
if err != nil {
return nil, err
}
stream, err := session.AcceptStream()
if err != nil {
return nil, err
}
return &KcpConn{session: session, stream: stream}, nil
}
func (c *KcpConn) setParam(conn *kcp.UDPSession) {
conn.SetStreamMode(true)
conn.SetWindowSize(10000, 10000)
conn.SetReadBuffer(16 * 1024 * 1024)
conn.SetWriteBuffer(16 * 1024 * 1024)
conn.SetNoDelay(0, 100, 1, 1)
conn.SetMtu(500)
conn.SetACKNoDelay(false)
}