TUN-9467: bump coredns to solve CVE

* TUN-9467: bump coredns to solve CVE

vendor/google.golang.org/grpc/grpclog/internal/loggerv2.go

@@ -0,0 +1,267 @@
+/*
+ *
+ * Copyright 2024 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package internal
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"os"
+)
+
+// LoggerV2 does underlying logging work for grpclog.
+type LoggerV2 interface {
+	// Info logs to INFO log. Arguments are handled in the manner of fmt.Print.
+	Info(args ...any)
+	// Infoln logs to INFO log. Arguments are handled in the manner of fmt.Println.
+	Infoln(args ...any)
+	// Infof logs to INFO log. Arguments are handled in the manner of fmt.Printf.
+	Infof(format string, args ...any)
+	// Warning logs to WARNING log. Arguments are handled in the manner of fmt.Print.
+	Warning(args ...any)
+	// Warningln logs to WARNING log. Arguments are handled in the manner of fmt.Println.
+	Warningln(args ...any)
+	// Warningf logs to WARNING log. Arguments are handled in the manner of fmt.Printf.
+	Warningf(format string, args ...any)
+	// Error logs to ERROR log. Arguments are handled in the manner of fmt.Print.
+	Error(args ...any)
+	// Errorln logs to ERROR log. Arguments are handled in the manner of fmt.Println.
+	Errorln(args ...any)
+	// Errorf logs to ERROR log. Arguments are handled in the manner of fmt.Printf.
+	Errorf(format string, args ...any)
+	// Fatal logs to ERROR log. Arguments are handled in the manner of fmt.Print.
+	// gRPC ensures that all Fatal logs will exit with os.Exit(1).
+	// Implementations may also call os.Exit() with a non-zero exit code.
+	Fatal(args ...any)
+	// Fatalln logs to ERROR log. Arguments are handled in the manner of fmt.Println.
+	// gRPC ensures that all Fatal logs will exit with os.Exit(1).
+	// Implementations may also call os.Exit() with a non-zero exit code.
+	Fatalln(args ...any)
+	// Fatalf logs to ERROR log. Arguments are handled in the manner of fmt.Printf.
+	// gRPC ensures that all Fatal logs will exit with os.Exit(1).
+	// Implementations may also call os.Exit() with a non-zero exit code.
+	Fatalf(format string, args ...any)
+	// V reports whether verbosity level l is at least the requested verbose level.
+	V(l int) bool
+}
+
+// DepthLoggerV2 logs at a specified call frame. If a LoggerV2 also implements
+// DepthLoggerV2, the below functions will be called with the appropriate stack
+// depth set for trivial functions the logger may ignore.
+//
+// # Experimental
+//
+// Notice: This type is EXPERIMENTAL and may be changed or removed in a
+// later release.
+type DepthLoggerV2 interface {
+	LoggerV2
+	// InfoDepth logs to INFO log at the specified depth. Arguments are handled in the manner of fmt.Println.
+	InfoDepth(depth int, args ...any)
+	// WarningDepth logs to WARNING log at the specified depth. Arguments are handled in the manner of fmt.Println.
+	WarningDepth(depth int, args ...any)
+	// ErrorDepth logs to ERROR log at the specified depth. Arguments are handled in the manner of fmt.Println.
+	ErrorDepth(depth int, args ...any)
+	// FatalDepth logs to FATAL log at the specified depth. Arguments are handled in the manner of fmt.Println.
+	FatalDepth(depth int, args ...any)
+}
+
+const (
+	// infoLog indicates Info severity.
+	infoLog int = iota
+	// warningLog indicates Warning severity.
+	warningLog
+	// errorLog indicates Error severity.
+	errorLog
+	// fatalLog indicates Fatal severity.
+	fatalLog
+)
+
+// severityName contains the string representation of each severity.
+var severityName = []string{
+	infoLog:    "INFO",
+	warningLog: "WARNING",
+	errorLog:   "ERROR",
+	fatalLog:   "FATAL",
+}
+
+// sprintf is fmt.Sprintf.
+// These vars exist to make it possible to test that expensive format calls aren't made unnecessarily.
+var sprintf = fmt.Sprintf
+
+// sprint is fmt.Sprint.
+// These vars exist to make it possible to test that expensive format calls aren't made unnecessarily.
+var sprint = fmt.Sprint
+
+// sprintln is fmt.Sprintln.
+// These vars exist to make it possible to test that expensive format calls aren't made unnecessarily.
+var sprintln = fmt.Sprintln
+
+// exit is os.Exit.
+// This var exists to make it possible to test functions calling os.Exit.
+var exit = os.Exit
+
+// loggerT is the default logger used by grpclog.
+type loggerT struct {
+	m          []*log.Logger
+	v          int
+	jsonFormat bool
+}
+
+func (g *loggerT) output(severity int, s string) {
+	sevStr := severityName[severity]
+	if !g.jsonFormat {
+		g.m[severity].Output(2, sevStr+": "+s)
+		return
+	}
+	// TODO: we can also include the logging component, but that needs more
+	// (API) changes.
+	b, _ := json.Marshal(map[string]string{
+		"severity": sevStr,
+		"message":  s,
+	})
+	g.m[severity].Output(2, string(b))
+}
+
+func (g *loggerT) printf(severity int, format string, args ...any) {
+	// Note the discard check is duplicated in each print func, rather than in
+	// output, to avoid the expensive Sprint calls.
+	// De-duplicating this by moving to output would be a significant performance regression!
+	if lg := g.m[severity]; lg.Writer() == io.Discard {
+		return
+	}
+	g.output(severity, sprintf(format, args...))
+}
+
+func (g *loggerT) print(severity int, v ...any) {
+	if lg := g.m[severity]; lg.Writer() == io.Discard {
+		return
+	}
+	g.output(severity, sprint(v...))
+}
+
+func (g *loggerT) println(severity int, v ...any) {
+	if lg := g.m[severity]; lg.Writer() == io.Discard {
+		return
+	}
+	g.output(severity, sprintln(v...))
+}
+
+func (g *loggerT) Info(args ...any) {
+	g.print(infoLog, args...)
+}
+
+func (g *loggerT) Infoln(args ...any) {
+	g.println(infoLog, args...)
+}
+
+func (g *loggerT) Infof(format string, args ...any) {
+	g.printf(infoLog, format, args...)
+}
+
+func (g *loggerT) Warning(args ...any) {
+	g.print(warningLog, args...)
+}
+
+func (g *loggerT) Warningln(args ...any) {
+	g.println(warningLog, args...)
+}
+
+func (g *loggerT) Warningf(format string, args ...any) {
+	g.printf(warningLog, format, args...)
+}
+
+func (g *loggerT) Error(args ...any) {
+	g.print(errorLog, args...)
+}
+
+func (g *loggerT) Errorln(args ...any) {
+	g.println(errorLog, args...)
+}
+
+func (g *loggerT) Errorf(format string, args ...any) {
+	g.printf(errorLog, format, args...)
+}
+
+func (g *loggerT) Fatal(args ...any) {
+	g.print(fatalLog, args...)
+	exit(1)
+}
+
+func (g *loggerT) Fatalln(args ...any) {
+	g.println(fatalLog, args...)
+	exit(1)
+}
+
+func (g *loggerT) Fatalf(format string, args ...any) {
+	g.printf(fatalLog, format, args...)
+	exit(1)
+}
+
+func (g *loggerT) V(l int) bool {
+	return l <= g.v
+}
+
+// LoggerV2Config configures the LoggerV2 implementation.
+type LoggerV2Config struct {
+	// Verbosity sets the verbosity level of the logger.
+	Verbosity int
+	// FormatJSON controls whether the logger should output logs in JSON format.
+	FormatJSON bool
+}
+
+// combineLoggers returns a combined logger for both higher & lower severity logs,
+// or only one if the other is io.Discard.
+//
+// This uses io.Discard instead of io.MultiWriter when all loggers
+// are set to io.Discard. Both this package and the standard log package have
+// significant optimizations for io.Discard, which io.MultiWriter lacks (as of
+// this writing).
+func combineLoggers(lower, higher io.Writer) io.Writer {
+	if lower == io.Discard {
+		return higher
+	}
+	if higher == io.Discard {
+		return lower
+	}
+	return io.MultiWriter(lower, higher)
+}
+
+// NewLoggerV2 creates a new LoggerV2 instance with the provided configuration.
+// The infoW, warningW, and errorW writers are used to write log messages of
+// different severity levels.
+func NewLoggerV2(infoW, warningW, errorW io.Writer, c LoggerV2Config) LoggerV2 {
+	flag := log.LstdFlags
+	if c.FormatJSON {
+		flag = 0
+	}
+
+	warningW = combineLoggers(infoW, warningW)
+	errorW = combineLoggers(errorW, warningW)
+
+	fatalW := errorW
+
+	m := []*log.Logger{
+		log.New(infoW, "", flag),
+		log.New(warningW, "", flag),
+		log.New(errorW, "", flag),
+		log.New(fatalW, "", flag),
+	}
+	return &loggerT{m: m, v: c.Verbosity, jsonFormat: c.FormatJSON}
+}