Add `parse_iana_protocol_number` and `parse_iana_protocol` function to VRL functions.

[AlexYangYu]

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Use Cases

In scenarios that parsing network device logs, it is necessary to translate the protocol number in the logs into protocol, a conversion that should be done in accordance with the IANA Protocol Number standards.

For example:

• 1 - > ICMP
• 6 -> TCP

Attempted Solutions

Currently, I only have two choice:

• handle number and protocol mapping at app later;
• wirte long sentence of if and else in remap transform, because I can not found vrl support map struct.

Proposal

add function in vrl for parsing the protocol num and protocol

References

No response

Version

No response

[coredump17]

You can also use CSV enrichment :)