/
cidr.go
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/
cidr.go
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// Copyright 2018 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ip
import (
"net"
)
// ParseCIDRs fetches all CIDRs referred to by the specified slice and returns
// them as regular golang CIDR objects.
func ParseCIDRs(cidrs []string) (valid []*net.IPNet, invalid []string) {
valid = make([]*net.IPNet, 0, len(cidrs))
invalid = make([]string, 0, len(cidrs))
for _, cidr := range cidrs {
_, prefix, err := net.ParseCIDR(cidr)
if err != nil {
// Likely the CIDR is specified in host format.
ip := net.ParseIP(cidr)
if ip == nil {
invalid = append(invalid, cidr)
continue
} else {
prefix = IPToPrefix(ip)
}
}
if prefix != nil {
valid = append(valid, prefix)
}
}
return valid, invalid
}