diff options
Diffstat (limited to 'libpod/network/internal/util/ip.go')
-rw-r--r-- | libpod/network/internal/util/ip.go | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/libpod/network/internal/util/ip.go b/libpod/network/internal/util/ip.go deleted file mode 100644 index 7fe35d3d4..000000000 --- a/libpod/network/internal/util/ip.go +++ /dev/null @@ -1,70 +0,0 @@ -package util - -import ( - "crypto/rand" - "net" - - "github.com/pkg/errors" -) - -func incByte(subnet *net.IPNet, idx int, shift uint) error { - if idx < 0 { - return errors.New("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, errors.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 -} - -func NetworkIntersectsWithNetworks(n *net.IPNet, networklist []*net.IPNet) bool { - for _, nw := range networklist { - if networkIntersect(n, nw) { - return true - } - } - return false -} - -func networkIntersect(n1, n2 *net.IPNet) bool { - return n2.Contains(n1.IP) || n1.Contains(n2.IP) -} - -// getRandomIPv6Subnet returns a random internal ipv6 subnet as described in RFC3879. -func getRandomIPv6Subnet() (net.IPNet, error) { - ip := make(net.IP, 8, net.IPv6len) - // read 8 random bytes - _, err := rand.Read(ip) - if err != nil { - return net.IPNet{}, nil - } - // first byte must be FD as per RFC3879 - ip[0] = 0xfd - // add 8 zero bytes - ip = append(ip, make([]byte, 8)...) - return net.IPNet{IP: ip, Mask: net.CIDRMask(64, 128)}, nil -} |