subnets

Documentation

Overview

TTL Tracker monitors the differentials in TTL of packets matched to a given subnet by finding a common integer variance in them, it attempts to guess how many 'hops' the given downstream subnet is from the capturepoint network

Index

• func IsViableSubnet(networkaddr net.IP, broadcastaddr net.IP) (*net.IPNet, bool)
• type Subnet
  • func NewSubnet(ipNet *net.IPNet) (subnet *Subnet, err error)
  • func (s Subnet) Match() bool
  • func (s Subnet) String()

Functions

func IsViableSubnet

func IsViableSubnet(networkaddr net.IP, broadcastaddr net.IP) (*net.IPNet, bool)

Can the given pairing of addresses viably describe the network and broadcast address of a valid CIDR subnet?

Types

type Subnet

type Subnet struct {
	Base uint32 // Integer of the base IP Address of this Subnet
	Mask uint32 // base Integer for XOR masking matching packets to this subnet (ie the subnet Mask)

	ObservedCount int       // how many incoming packets have matched this Potential Subnet?
	Subnets       []*Subnet // Potential Subnets of this Subnet
}

func NewSubnet

func NewSubnet(ipNet *net.IPNet) (subnet *Subnet, err error)

func (Subnet) Match

func (s Subnet) Match() bool

does this packet's Address XOR match the given Base and Mask ?

func (Subnet) String

func (s Subnet) String()

write this subnet out in CIDR notation