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Add session context outbounds as slice (#3356)

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* Add session context outbounds as slice

slice is needed for dialer proxy where two outbounds work on top of each other
There are two sets of target addr for example
It also enable Xtls to correctly do splice copy by checking both outbounds are ready to do direct copy

* Fill outbound tag info

* Splice now checks capalibility from all outbounds

* Fix unit tests
This commit is contained in:
yuhan6665 2024-05-13 21:52:24 -04:00 • committed by GitHub
parent 0735053348
commit 017f53b5fc
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42 changed files with 303 additions and 236 deletions
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102
proxy/proxy.go
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@ -474,45 +474,73 @@ func CopyRawConnIfExist(ctx context.Context, readerConn net.Conn, writerConn net
readerConn, readCounter, _ := UnwrapRawConn(readerConn)
writerConn, _, writeCounter := UnwrapRawConn(writerConn)
reader := buf.NewReader(readerConn)
if inbound := session.InboundFromContext(ctx); inbound != nil {
if tc, ok := writerConn.(*net.TCPConn); ok && readerConn != nil && writerConn != nil && (runtime.GOOS == "linux" || runtime.GOOS == "android") {
for inbound.CanSpliceCopy != 3 {
if inbound.CanSpliceCopy == 1 {
newError("CopyRawConn splice").WriteToLog(session.ExportIDToError(ctx))
statWriter, _ := writer.(*dispatcher.SizeStatWriter)
//runtime.Gosched() // necessary
time.Sleep(time.Millisecond) // without this, there will be a rare ssl error for freedom splice
w, err := tc.ReadFrom(readerConn)
if readCounter != nil {
readCounter.Add(w) // outbound stats
}
if writeCounter != nil {
writeCounter.Add(w) // inbound stats
}
if statWriter != nil {
statWriter.Counter.Add(w) // user stats
}
if err != nil && errors.Cause(err) != io.EOF {
return err
}
return nil
}
buffer, err := reader.ReadMultiBuffer()
if !buffer.IsEmpty() {
if readCounter != nil {
readCounter.Add(int64(buffer.Len()))
}
timer.Update()
if werr := writer.WriteMultiBuffer(buffer); werr != nil {
return werr
}
}
if err != nil {
return err
}
}
if runtime.GOOS != "linux" && runtime.GOOS != "android" {
return readV(ctx, reader, writer, timer, readCounter)
}
tc, ok := writerConn.(*net.TCPConn)
if !ok || readerConn == nil || writerConn == nil {
return readV(ctx, reader, writer, timer, readCounter)
}
inbound := session.InboundFromContext(ctx)
if inbound == nil || inbound.CanSpliceCopy == 3 {
return readV(ctx, reader, writer, timer, readCounter)
}
outbounds := session.OutboundsFromContext(ctx)
if len(outbounds) == 0 {
return readV(ctx, reader, writer, timer, readCounter)
}
for _, ob := range outbounds {
if ob.CanSpliceCopy == 3 {
return readV(ctx, reader, writer, timer, readCounter)
}
}
for {
inbound := session.InboundFromContext(ctx)
outbounds := session.OutboundsFromContext(ctx)
var splice = inbound.CanSpliceCopy == 1
for _, ob := range outbounds {
if ob.CanSpliceCopy != 1 {
splice = false
}
}
if splice {
newError("CopyRawConn splice").WriteToLog(session.ExportIDToError(ctx))
statWriter, _ := writer.(*dispatcher.SizeStatWriter)
//runtime.Gosched() // necessary
time.Sleep(time.Millisecond) // without this, there will be a rare ssl error for freedom splice
w, err := tc.ReadFrom(readerConn)
if readCounter != nil {
readCounter.Add(w) // outbound stats
}
if writeCounter != nil {
writeCounter.Add(w) // inbound stats
}
if statWriter != nil {
statWriter.Counter.Add(w) // user stats
}
if err != nil && errors.Cause(err) != io.EOF {
return err
}
return nil
}
buffer, err := reader.ReadMultiBuffer()
if !buffer.IsEmpty() {
if readCounter != nil {
readCounter.Add(int64(buffer.Len()))
}
timer.Update()
if werr := writer.WriteMultiBuffer(buffer); werr != nil {
return werr
}
}
if err != nil {
return err
}
}
}
func readV(ctx context.Context, reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, readCounter stats.Counter) error {
newError("CopyRawConn readv").WriteToLog(session.ExportIDToError(ctx))
if err := buf.Copy(reader, writer, buf.UpdateActivity(timer), buf.AddToStatCounter(readCounter)); err != nil {
return newError("failed to process response").Base(err)