Cherry-pick #15449 to 7.5: [Filebeat] Fixes for NetFlow v9 devices from various vendors #15555
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…#15449) - Allow for zero scope fields in options template NetFlow v9 spec allows for options templates that contain no scope fields. The netflow input was treating this case as an error and discarding the template, but that is only applicable to IPFIX. - Use additional fields to populate bytes/pkt counters Some devices out there (Cisco NSEL) use fields 231/232 as bytes counters, when those are supposed to be layer 4 payload counters. This updates the ECS fields populator to use those fields when the expected ones are not found. - Support a classId of 32 bits While the spec mandates a classId of 8 bits, some Cisco ASA devices actually use a 32 bit version of this field. This patches the field to allow up to 32-bit integers and updates the index pattern to use `long` for the `netflow.class_id` field. - Add more fields from v9 Cisco devices Fixes elastic#14212 (cherry picked from commit c3a3604)
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…#15449) (elastic#15555) - Allow for zero scope fields in options template NetFlow v9 spec allows for options templates that contain no scope fields. The netflow input was treating this case as an error and discarding the template, but that is only applicable to IPFIX. - Use additional fields to populate bytes/pkt counters Some devices out there (Cisco NSEL) use fields 231/232 as bytes counters, when those are supposed to be layer 4 payload counters. This updates the ECS fields populator to use those fields when the expected ones are not found. - Support a classId of 32 bits While the spec mandates a classId of 8 bits, some Cisco ASA devices actually use a 32 bit version of this field. This patches the field to allow up to 32-bit integers and updates the index pattern to use `long` for the `netflow.class_id` field. - Add more fields from v9 Cisco devices Fixes elastic#14212 (cherry picked from commit 10262cf)
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Cherry-pick of PR #15449 to 7.5 branch. Original message:
A few problems have been identified in some Cisco devices that use NetFlow v9:
Fixes: #14212