b87cf1ba9c
Adds a function to generate chain names for use in iptables and ports all drivers to use that function. Also adds tests for the said function.
21 lines
464 B
Go
21 lines
464 B
Go
package utils
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import (
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"crypto/sha512"
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"fmt"
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)
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// 29 - len('CNI') - 2*len('-')
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const maxNameLen = 16
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// Generates a chain name to be used with iptables.
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// Ensures that the generated name is less than
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// 29 chars in length
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func FormatChainName(name string, id string) string {
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h := sha512.Sum512([]byte(id))
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if len(name) > maxNameLen {
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return fmt.Sprintf("CNI-%s-%x", name[:len(name)-maxNameLen], h[:8])
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}
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return fmt.Sprintf("CNI-%s-%x", name, h[:8])
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}
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