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Diffstat (limited to 'libpod/network/subnet.go')
-rw-r--r--libpod/network/subnet.go78
1 files changed, 0 insertions, 78 deletions
diff --git a/libpod/network/subnet.go b/libpod/network/subnet.go
deleted file mode 100644
index 120038e57..000000000
--- a/libpod/network/subnet.go
+++ /dev/null
@@ -1,78 +0,0 @@
-package network
-
-/*
- The code in this was kindly contributed by Dan Williams(dcbw@redhat.com). Many thanks
- for his contributions.
-*/
-
-import (
- "fmt"
- "net"
-)
-
-func incByte(subnet *net.IPNet, idx int, shift uint) error {
- if idx < 0 {
- return fmt.Errorf("no more subnets left")
- }
- if subnet.IP[idx] == 255 {
- subnet.IP[idx] = 0
- return incByte(subnet, idx-1, 0)
- }
- subnet.IP[idx] += 1 << shift
- return nil
-}
-
-// NextSubnet returns subnet incremented by 1
-func NextSubnet(subnet *net.IPNet) (*net.IPNet, error) {
- newSubnet := &net.IPNet{
- IP: subnet.IP,
- Mask: subnet.Mask,
- }
- ones, bits := newSubnet.Mask.Size()
- if ones == 0 {
- return nil, fmt.Errorf("%s has only one subnet", subnet.String())
- }
- zeroes := uint(bits - ones)
- shift := zeroes % 8
- idx := ones/8 - 1
- if idx < 0 {
- idx = 0
- }
- if err := incByte(newSubnet, idx, shift); err != nil {
- return nil, err
- }
- return newSubnet, nil
-}
-
-// LastIPInSubnet gets the last IP in a subnet
-func LastIPInSubnet(addr *net.IPNet) (net.IP, error) { //nolint:interfacer
- // re-parse to ensure clean network address
- _, cidr, err := net.ParseCIDR(addr.String())
- if err != nil {
- return nil, err
- }
-
- ones, bits := cidr.Mask.Size()
- if ones == bits {
- return cidr.IP, nil
- }
- for i := range cidr.IP {
- cidr.IP[i] = cidr.IP[i] | ^cidr.Mask[i]
- }
- return cidr.IP, nil
-}
-
-// FirstIPInSubnet gets the first IP in a subnet
-func FirstIPInSubnet(addr *net.IPNet) (net.IP, error) { //nolint:interfacer
- // re-parse to ensure clean network address
- _, cidr, err := net.ParseCIDR(addr.String())
- if err != nil {
- return nil, err
- }
- ones, bits := cidr.Mask.Size()
- if ones == bits {
- return cidr.IP, nil
- }
- cidr.IP[len(cidr.IP)-1]++
- return cidr.IP, nil
-}