{"record":{"id":"a526e099c41b7d56","repo":"XTLS/Xray-core","slug":"padding-turns-d-and-d-have-the-same-direction","errorCode":null,"errorMessage":"padding turns %d and %d have the same direction","messagePattern":"padding turns (.+?) and (.+?) have the same direction","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"transport/internet/finalmask/xmc/padding.go","lineNumber":125,"sourceCode":"\t\t\tif len(turn.variants) > 0 {\n\t\t\t\treturn fmt.Errorf(\"padding turn %d combines variants with a send range\", i)\n\t\t\t}\n\t\t\tif turn.sendMinLength < minLength || turn.sendMaxLength < turn.sendMinLength || turn.sendMaxLength > maxLength {\n\t\t\t\treturn fmt.Errorf(\"padding turn %d has an invalid send range: %d-%d\", i, turn.sendMinLength, turn.sendMaxLength)\n\t\t\t}\n\t\t}\n\t\tif i == 0 && minLength-firstTurnPrefixLength < 1 {\n\t\t\treturn fmt.Errorf(\"padding turn 0 is too short for %d prefix bytes\", firstTurnPrefixLength)\n\t\t}\n\t\tif i == 0 && len(turn.variants) > 0 {\n\t\t\tfor j, variant := range turn.variants {\n\t\t\t\tif _, _, err = trimPaddingPrefix(variant, firstTurnPrefixLength); err != nil {\n\t\t\t\t\treturn fmt.Errorf(\"padding turn 0 variant %d: %w\", j, err)\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\tif i > 0 && turn.direction == schedule[i-1].direction {\n\t\t\treturn fmt.Errorf(\"padding turns %d and %d have the same direction\", i-1, i)\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc writePaddingTurn(w io.Writer, turn paddingTurn, prefixLength int) error {\n\treturn writePaddingTurnWithSleep(w, turn, prefixLength, time.Sleep)\n}\n\nfunc writePaddingTurnWithSleep(w io.Writer, turn paddingTurn, prefixLength int, sleep func(time.Duration)) error {\n\treturn writePaddingTurnWithBuffer(w, turn, prefixLength, sleep, nil)\n}\n\nfunc writePaddingTurnWithBuffer(w io.Writer, turn paddingTurn, prefixLength int, sleep func(time.Duration), reusableBuffer *[]byte) error {\n\tstartDelay, err := randomPaddingDelay(turn.startDelay)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"select padding start delay: %w\", err)\n\t}","sourceCodeStart":107,"sourceCodeEnd":143,"githubUrl":"https://github.com/XTLS/Xray-core/blob/7d214f8b094f75322fa3990f8aadad1c912f24f5/transport/internet/finalmask/xmc/padding.go#L107-L143","documentation":"Error \"padding turns %d and %d have the same direction\" thrown in XTLS/Xray-core.","triggerScenarios":"Thrown at transport/internet/finalmask/xmc/padding.go:125 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"7d214f8b094f75322fa3990f8aadad1c912f24f5","analyzedAt":"2026-08-15T14:26:24.325Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}