ginuerzh
91 lines
2.0 KiB
Go
91 lines
2.0 KiB
Go
package http
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import (
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"bytes"
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"context"
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"errors"
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"net"
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"net/http"
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"net/http/httputil"
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"time"
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"github.com/go-gost/core/logger"
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ictx "github.com/go-gost/x/internal/ctx"
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"github.com/go-gost/x/internal/net/udp"
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"github.com/go-gost/x/internal/util/socks"
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xrecorder "github.com/go-gost/x/recorder"
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)
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func (h *httpHandler) handleUDP(ctx context.Context, conn net.Conn, ro *xrecorder.HandlerRecorderObject, log logger.Logger) error {
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log = log.WithFields(map[string]any{
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"cmd": "udp",
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})
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resp := &http.Response{
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ProtoMajor: 1,
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ProtoMinor: 1,
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Header: h.md.header,
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}
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if resp.Header == nil {
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resp.Header = http.Header{}
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}
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if !h.md.enableUDP {
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resp.StatusCode = http.StatusForbidden
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if log.IsLevelEnabled(logger.TraceLevel) {
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dump, _ := httputil.DumpResponse(resp, false)
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log.Trace(string(dump))
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}
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log.Error("http: UDP relay is disabled")
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return resp.Write(conn)
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}
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resp.StatusCode = http.StatusOK
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if log.IsLevelEnabled(logger.TraceLevel) {
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dump, _ := httputil.DumpResponse(resp, false)
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log.Trace(string(dump))
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}
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if err := resp.Write(conn); err != nil {
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log.Error(err)
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return err
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}
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// obtain a udp connection
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var buf bytes.Buffer
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c, err := h.options.Router.Dial(ictx.ContextWithBuffer(ctx, &buf), "udp", "") // UDP association
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ro.Route = buf.String()
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if err != nil {
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log.Error(err)
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return err
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}
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defer c.Close()
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log.WithFields(map[string]any{"src": c.LocalAddr().String()})
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ro.SrcAddr = c.LocalAddr().String()
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pc, ok := c.(net.PacketConn)
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if !ok {
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err = errors.New("wrong connection type")
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log.Error(err)
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return err
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}
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relay := udp.NewRelay(socks.UDPTunServerConn(conn), pc).
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WithService(h.options.Service).
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WithBypass(h.options.Bypass).
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WithBufferSize(h.md.udpBufferSize).
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WithLogger(log)
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t := time.Now()
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log.Infof("%s <-> %s", conn.RemoteAddr(), pc.LocalAddr())
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relay.Run(ctx)
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log.WithFields(map[string]any{
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"duration": time.Since(t),
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}).Infof("%s >-< %s", conn.RemoteAddr(), pc.LocalAddr())
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return nil
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}
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