50 lines
1 KiB
Go
50 lines
1 KiB
Go
package tcp
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import (
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"io"
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"net"
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"github.com/containous/traefik/log"
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)
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// Proxy forwards a TCP request to a TCP service
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type Proxy struct {
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target *net.TCPAddr
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}
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// NewProxy creates a new Proxy
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func NewProxy(address string) (*Proxy, error) {
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tcpAddr, err := net.ResolveTCPAddr("tcp", address)
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if err != nil {
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return nil, err
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}
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return &Proxy{
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target: tcpAddr,
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}, nil
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}
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// ServeTCP forwards the connection to a service
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func (p *Proxy) ServeTCP(conn net.Conn) {
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log.Debugf("Handling connection from %s", conn.RemoteAddr())
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defer conn.Close()
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connBackend, err := net.DialTCP("tcp", nil, p.target)
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if err != nil {
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log.Errorf("Error while connection to backend: %v", err)
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return
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}
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defer connBackend.Close()
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errChan := make(chan error, 1)
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go connCopy(conn, connBackend, errChan)
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go connCopy(connBackend, conn, errChan)
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err = <-errChan
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if err != nil {
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log.Errorf("Error during connection: %v", err)
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}
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}
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func connCopy(dst, src net.Conn, errCh chan error) {
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_, err := io.Copy(dst, src)
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errCh <- err
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}
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