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48 Zeilen
1.2 KiB
Go
48 Zeilen
1.2 KiB
Go
package main
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import (
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"fmt"
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"io"
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"os"
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"proxy/cmd"
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"unicode"
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)
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// Start the two plugs and run two concurrent forward methods
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func main() {
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c1 := cmd.New("vde_plug", "/run/vde/sw_main.sock")
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c2 := cmd.New("vde_plug", "/run/vde/sw_proxy.sock")
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c1.Execute()
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c2.Execute()
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go pipeForward(c1.OutReader, c2.InWriter, cmd.In)
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go pipeForward(c2.OutReader, c1.InWriter, cmd.Out)
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c1.WaitH()
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c2.WaitH()
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}
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// Reads from an input and writes to and output,
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// do things to the content in between.
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// For now only output it in xxd format.
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// Is meant to be run concurrently with "go pipeForward(...)"
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func pipeForward(reader io.Reader, writer io.Writer, prefix string) {
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i := 0
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for {
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bytes := make([]byte, 16)
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bytesReadable := make([]byte, 16)
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_, err := reader.Read(bytes)
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if err == io.EOF {
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break
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}
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for i, ch := range bytes {
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if ch > unicode.MaxASCII || ch < '\u0020' {
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bytesReadable[i] = '\u002E'
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} else {
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bytesReadable[i] = ch
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}
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}
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xxdString := fmt.Sprintf("%s%08x: %04x %04x %04x %04x %04x %04x %04x %04x %s\n", prefix, i, bytes[0:1], bytes[2:3], bytes[4:5], bytes[6:7], bytes[8:9], bytes[10:11], bytes[12:13], bytes[14:15], bytesReadable)
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os.Stdout.WriteString(xxdString)
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writer.Write(bytes)
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i += 16
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}
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} |