Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/inputs/netflow/mappings.go

@@ -0,0 +1,44 @@
+package netflow
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+)
+
+var funcMapping = map[string]decoderFunc{
+	"uint":   decodeUint,
+	"hex":    decodeHex,
+	"string": decodeString,
+	"ip":     decodeIP,
+	"proto":  decodeL4Proto,
+}
+
+func loadMapping(filename string) (map[string]fieldMapping, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, fmt.Errorf("opening %q failed: %w", filename, err)
+	}
+	defer file.Close()
+
+	reader := csv.NewReader(file)
+	reader.Comma = ','
+	reader.Comment = '#'
+	reader.TrimLeadingSpace = true
+	records, err := reader.ReadAll()
+	if err != nil {
+		return nil, fmt.Errorf("reading csv failed: %w", err)
+	}
+
+	mappings := make(map[string]fieldMapping, len(records))
+	for _, r := range records {
+		id, name, dtype := r[0], r[1], r[2]
+		fun, found := funcMapping[dtype]
+		if !found {
+			return nil, fmt.Errorf("unknown data-type %q for id %q", dtype, id)
+		}
+		mappings[id] = fieldMapping{name, fun}
+	}
+
+	return mappings, nil
+}