subnet

func CIDRFromRange ¶ added in v2.4.0

func CIDRFromRange(startStr, endStr string) string

CIDRFromRange inverts FirstIPInSubnet/LastIPInSubnet: it rebuilds the CIDR from the start and end they produced. Returns "" for empty or unparsable bounds. A /31 or /127 has no distinct network and broadcast, so it recomputes as /32 or /128.

func FirstIPInSubnet ¶

func FirstIPInSubnet(addr *net.IPNet) (net.IP, error)

firstIPInSubnet gets the first IP in a subnet https://github.com/containers/podman/blob/v4.0.0-rc1/libpod/network/util/ip.go#L36

func GetFreeSubnet ¶

func GetFreeSubnet(n *net.IPNet, usedNetworks []*net.IPNet) (*net.IPNet, error)

GetFreeSubnet try to find a free subnet in the given network

func GetLiveNetworkSubnets ¶

func GetLiveNetworkSubnets() ([]*net.IPNet, error)

func IntersectsWithNetworks ¶

func IntersectsWithNetworks(n *net.IPNet, networklist []*net.IPNet) bool

func LastIPInSubnet ¶

func LastIPInSubnet(addr *net.IPNet) (net.IP, error)

lastIPInSubnet gets the last IP in a subnet https://github.com/containers/podman/blob/v4.0.0-rc1/libpod/network/util/ip.go#L18