IPFIX Template decoding does not handle Enterprise-Specific Information Elements

[rafal-prasal]

According to IPFIX RFC, when field highest bit is set to 1 then the field is considered Enterprise.
In such case just after that filed there are additional 4 bytes with value Enterprise Number an id in the field interpretation for the lookup table.

Due to that when hitting records with Enterprise-Specific Information Elements will get corrupted.

link to RFC
https://datatracker.ietf.org/doc/html/rfc7011#page-64

link to faulty function:

goflow/decoders/netflow/netflow.go

Line 93 in 742cddc

func DecodeTemplateSet(payload *bytes.Buffer) ([]TemplateRecord, error) {