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// Copyright 2017 CNI authors
//
// 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 allocator
import (
"fmt"
"net"
"strings"
)
// Contains returns true if any range in this set contains an IP
func (s *RangeSet) Contains(addr net.IP) bool {
r, _ := s.RangeFor(addr)
return r != nil
}
// RangeFor finds the range that contains an IP, or nil if not found
func (s *RangeSet) RangeFor(addr net.IP) (*Range, error) {
if err := canonicalizeIP(&addr); err != nil {
return nil, err
}
for _, r := range *s {
if r.Contains(addr) {
return &r, nil
}
}
return nil, fmt.Errorf("%s not in range set %s", addr.String(), s.String())
}
// Overlaps returns true if any ranges in any set overlap with this one
func (s *RangeSet) Overlaps(p1 *RangeSet) bool {
for _, r := range *s {
for _, r1 := range *p1 {
if r.Overlaps(&r1) {
return true
}
}
}
return false
}
// Canonicalize ensures the RangeSet is in a standard form, and detects any
// invalid input. Call Range.Canonicalize() on every Range in the set
func (s *RangeSet) Canonicalize() error {
if len(*s) == 0 {
return fmt.Errorf("empty range set")
}
fam := 0
for i := range *s {
if err := (*s)[i].Canonicalize(); err != nil {
return err
}
if i == 0 {
fam = len((*s)[i].RangeStart)
} else {
if fam != len((*s)[i].RangeStart) {
return fmt.Errorf("mixed address families")
}
}
}
// Make sure none of the ranges in the set overlap
l := len(*s)
for i, r1 := range (*s)[:l-1] {
for _, r2 := range (*s)[i+1:] {
if r1.Overlaps(&r2) {
return fmt.Errorf("subnets %s and %s overlap", r1.String(), r2.String())
}
}
}
return nil
}
func (s *RangeSet) String() string {
out := []string{}
for _, r := range *s {
out = append(out, r.String())
}
return strings.Join(out, ",")
}
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