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48 lines
831 B
Go
48 lines
831 B
Go
package proxy
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import (
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"io"
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"net"
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"sync"
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"sync/atomic"
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"time"
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"github.com/golang/glog"
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)
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//go:generate stringer -type=netType $GOFILE
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type netType int
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const (
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QUIC netType = iota
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KCP
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TCP
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)
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func relay(conn1, conn2 net.Conn) {
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wg := &sync.WaitGroup{}
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exitFlag := new(int32)
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wg.Add(2)
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go redirect(conn2, conn1, wg, exitFlag)
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redirect(conn1, conn2, wg, exitFlag)
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wg.Wait()
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}
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func redirect(dst, src net.Conn, wg *sync.WaitGroup, exitFlag *int32) {
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if _, err := io.Copy(dst, src); err != nil {
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glog.V(1).Infof("%s<>%s -> %s<>%s: %s", src.RemoteAddr(), src.LocalAddr(), dst.LocalAddr(), dst.RemoteAddr(), err)
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}
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if atomic.CompareAndSwapInt32(exitFlag, 0, 1) {
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// wakeup blocked goroutine
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now := time.Now()
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src.SetDeadline(now)
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dst.SetDeadline(now)
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} else {
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src.Close()
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dst.Close()
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}
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wg.Done()
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}
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