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feat(inputs.netflow): Add support for netflow v9 option packets (#15180)

This commit is contained in:
Sven Rebhan 2024-04-23 11:43:36 -04:00 committed by GitHub
parent 46dbab0c0d
commit 5c483dc3a9
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GPG Key ID: B5690EEEBB952194
5 changed files with 39 additions and 1 deletions
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28
plugins/inputs/netflow/netflow_decoder.go
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@ -577,6 +577,34 @@ func (d *netflowDecoder) Decode(srcIP net.IP, payload []byte) ([]telegraf.Metric
case netflow.TemplateFlowSet:
case netflow.NFv9OptionsTemplateFlowSet:
case netflow.OptionsDataFlowSet:
for _, record := range fs.Records {
tags := map[string]string{
"source": src,
"version": "NetFlowV9",
}
fields := make(map[string]interface{})
for _, value := range record.ScopesValues {
decodedFields, err := d.decodeValueV9(value)
if err != nil {
d.Log.Errorf("decoding option record %+v failed: %v", record, err)
continue
}
for _, field := range decodedFields {
fields[field.Key] = field.Value
}
}
for _, value := range record.OptionsValues {
decodedFields, err := d.decodeValueV9(value)
if err != nil {
d.Log.Errorf("decoding option record %+v failed: %v", record, err)
continue
}
for _, field := range decodedFields {
fields[field.Key] = field.Value
}
}
metrics = append(metrics, metric.New("netflow_options", tags, fields, t))
}
case netflow.DataFlowSet:
for _, record := range fs.Records {
tags := map[string]string{

8
plugins/inputs/netflow/testcases/netflow_v9_options/expected.out Normal file
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@ -0,0 +1,8 @@
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=1u,interface="Te0/0/0",interface_desc="TenGigabitEthernet0/0/0",out_snmp=1u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=2u,interface="Te0/0/1",interface_desc="TenGigabitEthernet0/0/1",out_snmp=2u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=3u,interface="Te0/0/2",interface_desc="TenGigabitEthernet0/0/2",out_snmp=3u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=4u,interface="Te0/0/3",interface_desc="TenGigabitEthernet0/0/3",out_snmp=4u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=5u,interface="Te0/0/4",interface_desc="TenGigabitEthernet0/0/4",out_snmp=5u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=6u,interface="Te0/0/5",interface_desc="TenGigabitEthernet0/0/5",out_snmp=6u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=7u,interface="Gi0",interface_desc="GigabitEthernet0",out_snmp=7u 1713379378304536264
netflow_options,source=127.0.0.1,version=NetFlowV9 in_bytes=169952189u,in_snmp=10u,interface="Lo0",interface_desc="Loopback0",out_snmp=10u 1713379378304536264

BIN
plugins/inputs/netflow/testcases/netflow_v9_options/message.bin Normal file
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2
plugins/inputs/netflow/testcases/netflow_v9_options/telegraf.conf Normal file
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@ -0,0 +1,2 @@
[[inputs.netflow]]
service_address = "udp://127.0.0.1:0"

2
plugins/inputs/netflow/type_conversion.go
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@ -142,7 +142,7 @@ func decodeHex(b []byte) (interface{}, error) {
}
func decodeString(b []byte) (interface{}, error) {
return string(b), nil
return strings.TrimRight(string(b), "\x00"), nil
}
func decodeMAC(b []byte) (interface{}, error) {