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pkg/utils: split and unexport constants

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This commit is contained in:
Stefan Junker
2016-03-31 10:08:52 +02:00
parent f429750105
commit d4e088aad4
2 changed files with 15 additions and 15 deletions
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17
utils/utils.go
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@ -5,16 +5,17 @@ import (
"fmt"
)
const ChainCNIPrefix = ("CNI-")
const MaxChainLength = 29 - len(ChainCNIPrefix)
const (
maxChainLength = 28
chainPrefix = "CNI-"
prefixLength = len(chainPrefix)
)
// Generates a chain name to be used with iptables.
// Ensures that the generated chain name is less than
// 29 chars in length
// maxChainLength chars in length
func FormatChainName(name string, id string) string {
chain := fmt.Sprintf("%x", sha512.Sum512([]byte(name+id)))
if len(chain) > MaxChainLength {
chain = chain[:MaxChainLength]
}
return fmt.Sprintf("%s%s", ChainCNIPrefix, chain)
chainBytes := sha512.Sum512([]byte(name + id))
chain := fmt.Sprintf("%s%x", chainPrefix, chainBytes)
return chain[:maxChainLength]
}