func (s *SimpleCopier) CopyBytes(in, out *net.TCPConn) {
var wg sync.WaitGroup
wg.Add(2)
go s.copy(fmt.Sprintf("from backend: %v -> %v", in.RemoteAddr(), out.RemoteAddr()), in, out, &wg)
go s.copy(fmt.Sprintf("to backend: %v -> %v", out.RemoteAddr(), in.RemoteAddr()), out, in, &wg)
wg.Wait()
}
func (s *SimpleCopier) copy(direction string, in, out *net.TCPConn, wg *sync.WaitGroup) {
defer func() {
in.Close(direction)
out.Close(direction)
if wg != nil {
wg.Done()
}
}()
n, err := io.CopyDesc(direction, in, out)
if err != nil {
if s.isClosedError(err) {
log.Printf("ERROR [%v] closed connection: %v", err)
} else {
log.Printf("ERROR [%v] unexpected error %v", direction, err)
}
}
log.Printf("[%v] Copied %d bytes", direction, n)
}
func (s *Splicer) CopyBytes(in, out *net.TCPConn) {
// Close the tcp connection given to us.
defer func() {
// TODO: Double close problems?
out.Close()
in.Close()
}()
// Invoking File() on the connection will duplicate the socket fd, setting
// the original (socket fd) to block.
inFile, err := in.File()
if err != nil {
log.Fatal(err)
}
inFD := int(inFile.Fd())
defer syscall.Close(inFD)
outFile, err := out.File()
if err != nil {
log.Fatal(err)
}
outFD := int(outFile.Fd())
defer syscall.Close(outFD)
var wg sync.WaitGroup
wg.Add(2)
go s.splice(fmt.Sprintf("from backend: %v -> %v", in.RemoteAddr(), out.RemoteAddr()), inFD, outFD, &wg)
go s.splice(fmt.Sprintf("to backend: %v -> %v", out.RemoteAddr(), in.RemoteAddr()), outFD, inFD, &wg)
wg.Wait()
}