Adding upstream version 1.34.4.

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

plugins/inputs/netflow/netflow_v5.go

@@ -0,0 +1,91 @@
+package netflow
+
+import (
+	"bytes"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/netsampler/goflow2/v2/decoders/netflowlegacy"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/metric"
+)
+
+// Decoder structure
+type netflowv5Decoder struct{}
+
+func (*netflowv5Decoder) init() error {
+	if err := initL4ProtoMapping(); err != nil {
+		return fmt.Errorf("initializing layer 4 protocol mapping failed: %w", err)
+	}
+	return nil
+}
+
+func (*netflowv5Decoder) decode(srcIP net.IP, payload []byte) ([]telegraf.Metric, error) {
+	src := srcIP.String()
+
+	// Decode the message
+	var msg netflowlegacy.PacketNetFlowV5
+	buf := bytes.NewBuffer(payload)
+	if err := netflowlegacy.DecodeMessageVersion(buf, &msg); err != nil {
+		return nil, err
+	}
+
+	// Extract metrics
+	t := time.Unix(int64(msg.UnixSecs), int64(msg.UnixNSecs))
+	metrics := make([]telegraf.Metric, 0, len(msg.Records))
+	for _, record := range msg.Records {
+		tags := map[string]string{
+			"source":  src,
+			"version": "NetFlowV5",
+		}
+		fields := map[string]interface{}{
+			"flows":             msg.Count,
+			"sys_uptime":        msg.SysUptime,
+			"seq_number":        msg.FlowSequence,
+			"engine_type":       mapEngineType(msg.EngineType),
+			"sampling_interval": msg.SamplingInterval,
+			"in_snmp":           record.Input,
+			"out_snmp":          record.Output,
+			"in_packets":        record.DPkts,
+			"in_bytes":          record.DOctets,
+			"first_switched":    record.First,
+			"last_switched":     record.Last,
+			"src_port":          record.SrcPort,
+			"dst_port":          record.DstPort,
+			"tcp_flags":         mapTCPFlags(record.TCPFlags),
+			"protocol":          mapL4Proto(record.Proto),
+			"bgp_src_as":        record.SrcAS,
+			"bgp_dst_as":        record.DstAS,
+			"src_mask":          record.SrcMask,
+			"dst_mask":          record.DstMask,
+		}
+
+		var err error
+		fields["engine_id"], err = decodeHex([]byte{msg.EngineId})
+		if err != nil {
+			return nil, fmt.Errorf("decoding 'engine_id' failed: %w", err)
+		}
+		fields["src"], err = decodeIPFromUint32(uint32(record.SrcAddr))
+		if err != nil {
+			return nil, fmt.Errorf("decoding 'src' failed: %w", err)
+		}
+		fields["dst"], err = decodeIPFromUint32(uint32(record.DstAddr))
+		if err != nil {
+			return nil, fmt.Errorf("decoding 'dst' failed: %w", err)
+		}
+		fields["next_hop"], err = decodeIPFromUint32(uint32(record.NextHop))
+		if err != nil {
+			return nil, fmt.Errorf("decoding 'next_hop' failed: %w", err)
+		}
+		fields["src_tos"], err = decodeHex([]byte{record.Tos})
+		if err != nil {
+			return nil, fmt.Errorf("decoding 'src_tos' failed: %w", err)
+		}
+
+		metrics = append(metrics, metric.New("netflow", tags, fields, t))
+	}
+
+	return metrics, nil
+}