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Jack-R-lanternJack-R-lantern
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hubble: add support for SCTP metrics
SCTP manages connection state using Chunk Types. SCTP Chunk Types are transmitted in the payload, not in the header. Currently, Cilium controls the amount of payload to extract using TracePayloadLen. Because of this, there are limitations in fully parsing SCTP Chunk Types. This commit adds support, based on the RFC, for Chunk Types that must appear first. Among them, SHUTDOWN is an exception: it may be transmitted together with a DATA chunk and therefore can be missed.
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‎api/v1/flow/README.md‎

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- [IPVersion](#flow-IPVersion)
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- [L7FlowType](#flow-L7FlowType)
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- [LostEventSource](#flow-LostEventSource)
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- [SCTPChunkType](#flow-SCTPChunkType)
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- [SocketTranslationPoint](#flow-SocketTranslationPoint)
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- [TraceObservationPoint](#flow-TraceObservationPoint)
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- [TraceReason](#flow-TraceReason)
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| ----- | ---- | ----- | ----------- |
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| source_port | [uint32](#uint32) | | |
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| destination_port | [uint32](#uint32) | | |
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| chunk_type | [SCTPChunkType](#flow-SCTPChunkType) | | |
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<a name="flow-SCTPChunkType"></a>
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### SCTPChunkType
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| Name | Number | Description |
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| ---- | ------ | ----------- |
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| UNSUPPORTED | 0 | |
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| INIT | 1 | |
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| INIT_ACK | 2 | |
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| SHUTDOWN | 3 | |
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| SHUTDOWN_ACK | 4 | |
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| SHUTDOWN_COMPLETE | 5 | |
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| ABORT | 6 | |
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<a name="flow-SocketTranslationPoint"></a>
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### SocketTranslationPoint

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