commit
3a873e99f5
31
request.go
31
request.go
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@ -3,10 +3,8 @@ package socks5
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import (
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"fmt"
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"io"
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"log"
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"net"
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"strings"
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"time"
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)
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const (
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@ -183,14 +181,18 @@ func (s *Server) handleConnect(conn conn, req *Request) error {
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// Start proxying
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errCh := make(chan error, 2)
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go proxy("target", target, req.bufConn, errCh, s.config.Logger)
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go proxy("client", conn, target, errCh, s.config.Logger)
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go proxy(target, req.bufConn, errCh)
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go proxy(conn, target, errCh)
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// Wait
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select {
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case e := <-errCh:
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return e
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for i := 0; i < 2; i++ {
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e := <-errCh
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if e != nil {
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// return from this function closes target (and conn).
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return e
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}
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}
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return nil
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}
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// handleBind is used to handle a connect command
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@ -327,15 +329,10 @@ func sendReply(w io.Writer, resp uint8, addr *AddrSpec) error {
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// proxy is used to suffle data from src to destination, and sends errors
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// down a dedicated channel
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func proxy(name string, dst io.Writer, src io.Reader, errCh chan error, logger *log.Logger) {
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// Copy
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n, err := io.Copy(dst, src)
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// Log, and sleep. This is jank but allows the otherside
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// to finish a pending copy
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logger.Printf("[DEBUG] socks: Copied %d bytes to %s", n, name)
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time.Sleep(10 * time.Millisecond)
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// Send any errors
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func proxy(dst io.Writer, src io.Reader, errCh chan error) {
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_, err := io.Copy(dst, src)
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if tcpConn, ok := dst.(*net.TCPConn); ok {
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tcpConn.CloseWrite()
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}
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errCh <- err
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}
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