networkutils

Documentation

Index

• func GetLocalIP() (net.IP, error)
• func IsIPInUse(client NetClient, ip string) bool
• func IsPortValid(port string) bool
• func ValidateIP(ip string) error
• type DefaultNetClient
  • func (n *DefaultNetClient) DialTimeout(network, address string, timeout time.Duration) (net.Conn, error)
• type IPGenerator
  • func NewIPGenerator(netClient NetClient) IPGenerator
  • func (ipgen IPGenerator) GenerateUniqueIP(cidrBlock string) (string, error)
• type IPPool
  • func NewIPPool() IPPool
  • func NewIPPoolFromEnv(ipPoolEnvVar string) (IPPool, error)
  • func NewIPPoolFromString(fromString string) IPPool
  • func (ipPool *IPPool) AddIP(ip string)
  • func (ipPool *IPPool) IsEmpty() bool
  • func (ipPool *IPPool) PopIP() (string, error)
  • func (ipPool *IPPool) ToEnvVar(envVarName string) error
  • func (ipPool *IPPool) ToString() string
• type NetClient

Functions

func GetLocalIP

func GetLocalIP() (net.IP, error)

func IsIPInUse

func IsIPInUse(client NetClient, ip string) bool

IsIPInUse performs a soft check to see if there are any services listening on a selection of common ports at ip by trying to establish a TCP connection. Ports checked include: 22, 23, 80, 443 and 6443 (Kubernetes API Server). Each connection attempt allows up-to 500ms for a response.

todo(chrisdoherty) change to an icmp approach to eliminate the need for ports.

func IsPortValid

func IsPortValid(port string) bool

func ValidateIP

func ValidateIP(ip string) error

Types

type DefaultNetClient

type DefaultNetClient struct{}

func (*DefaultNetClient) DialTimeout

func (n *DefaultNetClient) DialTimeout(network, address string, timeout time.Duration) (net.Conn, error)

type IPGenerator

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

func NewIPGenerator

func NewIPGenerator(netClient NetClient) IPGenerator

func (IPGenerator) GenerateUniqueIP

func (ipgen IPGenerator) GenerateUniqueIP(cidrBlock string) (string, error)

type IPPool

type IPPool []string

func NewIPPool

func NewIPPool() IPPool

func NewIPPoolFromEnv

func NewIPPoolFromEnv(ipPoolEnvVar string) (IPPool, error)

func NewIPPoolFromString

func NewIPPoolFromString(fromString string) IPPool

func (*IPPool) AddIP

func (ipPool *IPPool) AddIP(ip string)

func (*IPPool) IsEmpty

func (ipPool *IPPool) IsEmpty() bool

func (*IPPool) PopIP

func (ipPool *IPPool) PopIP() (string, error)

func (*IPPool) ToEnvVar

func (ipPool *IPPool) ToEnvVar(envVarName string) error

func (*IPPool) ToString

func (ipPool *IPPool) ToString() string

type NetClient

type NetClient interface {
	DialTimeout(network, address string, timeout time.Duration) (net.Conn, error)
}