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https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-10 06:20:26 +00:00
rearrange tcp reading loop
according to documentation of io.Reader interface, "Callers should always process the n > 0 bytes returned before considering the error err. Doing so correctly handles I/O errors that happen after reading some bytes and also both of the allowed EOF behaviors."
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@ -324,26 +324,29 @@ func (iface *tcpInterface) reader(sock net.Conn, in func([]byte)) error {
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timeout := time.Now().Add(tcp_timeout)
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sock.SetReadDeadline(timeout)
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n, err := sock.Read(bs[len(frag):])
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if n > 0 {
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frag = bs[:len(frag)+n]
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for {
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msg, ok, err2 := tcp_chop_msg(&frag)
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if err2 != nil {
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return fmt.Errorf("Message error: %v", err2)
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}
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if !ok {
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// We didn't get the whole message yet
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break
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}
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newMsg := append(util_getBytes(), msg...)
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in(newMsg)
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util_yield()
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}
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frag = append(bs[:0], frag...)
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}
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if err != nil || n == 0 {
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if err != io.EOF {
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return err
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}
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return nil
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}
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frag = bs[:len(frag)+n]
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for {
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msg, ok, err := tcp_chop_msg(&frag)
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if err != nil {
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return fmt.Errorf("Message error: %v", err)
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}
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if !ok {
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break
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} // We didn't get the whole message yet
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newMsg := append(util_getBytes(), msg...)
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in(newMsg)
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util_yield()
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}
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frag = append(bs[:0], frag...)
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}
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}
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