netutils

README

netutils

Miscellaneous network utilities

Documentation

Index

• func GenerateDefaultGateway(sna *net.IPNet) net.IP
• func GetHostIPNetworks(skipInterfaces []string) ([]*net.IPNet, []net.IP, error)
• func GetNodeIP(nodeName string) (string, error)
• func IPToUint32(ip net.IP) uint32
• func IsPrivateAddress(addr string) bool
• func ParseCIDRMask(cidr string) (*net.IPNet, error)
• func Uint32ToIP(u uint32) net.IP
• type SubnetAllocator
  • func NewSubnetAllocator(network string, hostBits uint32, inUse []string) (*SubnetAllocator, error)
  • func (sna *SubnetAllocator) GetNetwork() (*net.IPNet, error)
  • func (sna *SubnetAllocator) ReleaseNetwork(ipnet *net.IPNet) error

Functions

func GenerateDefaultGateway

func GenerateDefaultGateway(sna *net.IPNet) net.IP

Generate the default gateway IP Address for a subnet

func GetHostIPNetworks

func GetHostIPNetworks(skipInterfaces []string) ([]*net.IPNet, []net.IP, error)

Return Host IP Networks Ignores provided interfaces and filters loopback and non IPv4 addrs.

func GetNodeIP

func GetNodeIP(nodeName string) (string, error)

func IPToUint32

func IPToUint32(ip net.IP) uint32

func IsPrivateAddress

func IsPrivateAddress(addr string) bool

IsPrivateAddress returns true if given address in format "<host>[:<port>]" is a localhost or an ip from private network range (e.g. 172.30.0.1, 192.168.0.1).

func ParseCIDRMask

func ParseCIDRMask(cidr string) (*net.IPNet, error)

ParseCIDRMask parses a CIDR string and ensures that it has no bits set beyond the network mask length. Use this when the input is supposed to be either a description of a subnet (eg, "192.168.1.0/24", meaning "192.168.1.0 to 192.168.1.255"), or a mask for matching against (eg, "192.168.1.15/32", meaning "must match all 32 bits of the address "192.168.1.15"). Use net.ParseCIDR() when the input is a host address that also describes the subnet that it is on (eg, "192.168.1.15/24", meaning "the address 192.168.1.15 on the network 192.168.1.0/24").

func Uint32ToIP

func Uint32ToIP(u uint32) net.IP

Types

type SubnetAllocator

type SubnetAllocator struct {
	// contains filtered or unexported fields
}

func NewSubnetAllocator

func NewSubnetAllocator(network string, hostBits uint32, inUse []string) (*SubnetAllocator, error)

func (*SubnetAllocator) GetNetwork

func (sna *SubnetAllocator) GetNetwork() (*net.IPNet, error)

func (*SubnetAllocator) ReleaseNetwork

func (sna *SubnetAllocator) ReleaseNetwork(ipnet *net.IPNet) error