func ComputeTrieValue()

in pkg/utils/utils.go [208:255]
41 lines of code
8 McCabe index (conditional complexity)

func ComputeTrieValue(l4Info []v1alpha1.Port, log logr.Logger, allowAll, denyAll bool) []byte {
	var startPort, endPort, protocol int

	value := make([]byte, TRIE_VALUE_LENGTH)
	startOffset := 0

	if len(l4Info) == 0 {
		allowAll = true
	}

	if allowAll || denyAll {
		protocol = deriveProtocolValue(v1alpha1.Port{}, allowAll, denyAll)
		binary.LittleEndian.PutUint32(value[startOffset:startOffset+4], uint32(protocol))
		startOffset += 4
		binary.LittleEndian.PutUint32(value[startOffset:startOffset+4], uint32(startPort))
		startOffset += 4
		binary.LittleEndian.PutUint32(value[startOffset:startOffset+4], uint32(endPort))
		startOffset += 4
		log.Info("L4 values: ", "protocol: ", protocol, "startPort: ", startPort, "endPort: ", endPort)
	}

	for _, l4Entry := range l4Info {
		if startOffset >= TRIE_VALUE_LENGTH {
			log.Error(nil, "No.of unique port/protocol combinations supported for a single endpoint exceeded the supported maximum of 24")
			return value
		}
		endPort = 0
		startPort = 0

		protocol = deriveProtocolValue(l4Entry, allowAll, denyAll)
		if l4Entry.Port != nil {
			startPort = int(*l4Entry.Port)
		}

		if l4Entry.EndPort != nil {
			endPort = int(*l4Entry.EndPort)
		}
		log.Info("L4 values: ", "protocol: ", protocol, "startPort: ", startPort, "endPort: ", endPort)
		binary.LittleEndian.PutUint32(value[startOffset:startOffset+4], uint32(protocol))
		startOffset += 4
		binary.LittleEndian.PutUint32(value[startOffset:startOffset+4], uint32(startPort))
		startOffset += 4
		binary.LittleEndian.PutUint32(value[startOffset:startOffset+4], uint32(endPort))
		startOffset += 4
	}

	return value
}