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helper.go
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helper.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package cidr
import (
"net"
"k8s.io/apimachinery/pkg/util/validation/field"
)
// ValidateCIDRParse validates that all the given CIDRs can be parsed successfully.
func ValidateCIDRParse(cidrPaths ...CIDR) (allErrs field.ErrorList) {
for _, cidrPath := range cidrPaths {
if cidrPath == nil {
continue
}
allErrs = append(allErrs, cidrPath.ValidateParse()...)
}
return allErrs
}
// ValidateCIDRIPFamily validates that all the given CIDRs can be matched to the correct IP Family.
func ValidateCIDRIPFamily(cidrs []CIDR, ipFamily string) field.ErrorList {
allErrs := field.ErrorList{}
for _, cidr := range cidrs {
if cidr == nil {
continue
}
allErrs = append(allErrs, cidr.ValidateIPFamily(ipFamily)...)
}
return allErrs
}
// ValidateCIDROverlap validates that the provided CIDRs do not overlap.
func ValidateCIDROverlap(paths []CIDR, overlap bool) field.ErrorList {
allErrs := field.ErrorList{}
for i := 0; i < len(paths)-1; i++ {
if paths[i] == nil {
continue
}
if overlap {
allErrs = append(allErrs, paths[i].ValidateOverlap(paths[i+1:]...)...)
} else {
allErrs = append(allErrs, paths[i].ValidateNotOverlap(paths[i+1:]...)...)
}
}
return allErrs
}
// ValidateCIDRIsCanonical validates that the provided CIDR is in canonical form.
func ValidateCIDRIsCanonical(fldPath *field.Path, cidrToValidate string) field.ErrorList {
allErrs := field.ErrorList{}
if len(cidrToValidate) == 0 {
return allErrs
}
// CIDR parse error already validated
ipAdress, ipNet, _ := net.ParseCIDR(cidrToValidate)
if ipNet != nil {
if !ipNet.IP.Equal(ipAdress) {
allErrs = append(allErrs, field.Invalid(fldPath, cidrToValidate, "must be valid canonical CIDR"))
}
}
return allErrs
}