netutils

Documentation

Index

• func CreateBitset(numBitsWide uint) *bitset.BitSet
• func GetIPNumber(subnetIP string, subnetLen uint, allocSubnetLen uint, hostIP string) (uint, error)
• func GetInterfaceIP(linkName string) (string, error)
• func GetSubnetIP(subnetIP string, subnetLen uint, allocSubnetLen, hostID uint) (string, error)
• func InitSubnetBitset(b *bitset.BitSet, subnetLen uint)
• func ParseCIDR(cidrStr string) (string, uint, error)
• func SetInterfaceMac(name string, macaddr string) error
• type TagRange
  • func ParseTagRanges(ranges string, tagType string) ([]TagRange, error)

Functions

func CreateBitset

func CreateBitset(numBitsWide uint) *bitset.BitSet

CreateBitset initializes a bit set with 2^numBitsWide bits

func GetIPNumber

func GetIPNumber(subnetIP string, subnetLen uint, allocSubnetLen uint, hostIP string) (uint, error)

GetIPNumber obtains the host id from the host IP. SEe `GetSubnetIP` for more information.

func GetInterfaceIP

func GetInterfaceIP(linkName string) (string, error)

GetInterfaceIP obtains the ip addr of a local interface on the host.

func GetSubnetIP

func GetSubnetIP(subnetIP string, subnetLen uint, allocSubnetLen, hostID uint) (string, error)

GetSubnetIP given a subnet IP and host identifier, calculates an IP within the subnet for use.

func InitSubnetBitset

func InitSubnetBitset(b *bitset.BitSet, subnetLen uint)

InitSubnetBitset initializes a bit set with 2^(32 - subnetLen) bits

func ParseCIDR

func ParseCIDR(cidrStr string) (string, uint, error)

ParseCIDR parses a CIDR string into a gateway IP and length.

func SetInterfaceMac

func SetInterfaceMac(name string, macaddr string) error

SetInterfaceMac : Set mac address of an interface

Types

type TagRange

type TagRange struct {
	Min int
	Max int
}

TagRange represents a range of integers, intended for VLAN and VXLAN tagging.

func ParseTagRanges

func ParseTagRanges(ranges string, tagType string) ([]TagRange, error)

ParseTagRanges takes a string such as 12-24,48-64 and turns it into a series of TagRange.