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Vision server allow multiple blocks of padding

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This commit is contained in:
yuhan6665 2023-02-11 02:11:24 -05:00
parent a5b297f968
commit fd6973b3c6
1 changed files with 12 additions and 5 deletions
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17
proxy/vless/encoding/encoding.go
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@ -256,7 +256,7 @@ func XtlsRead(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater
) error {
err := func() error {
var ct stats.Counter
filterUUID := true
withinPaddingBuffers := false
shouldSwitchToDirectCopy := false
var remainingContent int32 = -1
var remainingPadding int32 = -1
@ -294,13 +294,15 @@ func XtlsRead(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater
}
buffer, err := reader.ReadMultiBuffer()
if !buffer.IsEmpty() {
if filterUUID && (*isTLS || *numberOfPacketToFilter > 0) {
if withinPaddingBuffers || *numberOfPacketToFilter > 0 {
buffer = XtlsUnpadding(ctx, buffer, userUUID, &remainingContent, &remainingPadding, &currentCommand)
if remainingContent == 0 && remainingPadding == 0 {
if currentCommand == 1 {
filterUUID = false
withinPaddingBuffers = false
remainingContent = -1
remainingPadding = -1 // set to initial state to parse the next padding
} else if currentCommand == 2 {
filterUUID = false
withinPaddingBuffers = false
shouldSwitchToDirectCopy = true
// XTLS Vision processes struct TLS Conn's input and rawInput
if inputBuffer, err := buf.ReadFrom(input); err == nil {
@ -313,9 +315,13 @@ func XtlsRead(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater
buffer, _ = buf.MergeMulti(buffer, rawInputBuffer)
}
}
} else if currentCommand != 0 {
} else if currentCommand == 0 {
withinPaddingBuffers = true
} else {
newError("XtlsRead unknown command ", currentCommand, buffer.Len()).WriteToLog(session.ExportIDToError(ctx))
}
} else {
withinPaddingBuffers = true
}
}
if *numberOfPacketToFilter > 0 {
@ -543,6 +549,7 @@ func XtlsUnpadding(ctx context.Context, buffer buf.MultiBuffer, userUUID []byte,
posByte = 16
*remainingContent = 0
*remainingPadding = 0
*currentCommand = 0
break
}
}