ipcache

Documentation

Overview

Package ipcache provides a time-based cache object to keep track of recently-seen IP addresses.

Index

• Variables
• type CacheTest
• type RecentIPCache
  • func New(ctx context.Context) *RecentIPCache
  • func (m *RecentIPCache) Add(ip string)
  • func (rc *RecentIPCache) GetCacheLength() int
  • func (rc *RecentIPCache) GetTestContent(ip string) string
  • func (m *RecentIPCache) Has(ip string) bool
  • func (rc *RecentIPCache) Trace(conn connection.Connection, sc scamper.Tracer)

Variables

var (
	// IPCacheTimeout sets a lower bound on the amount of time between subsequent traceroutes to a single IP address.
	IPCacheTimeout = flag.Duration("IPCacheTimeout", 120*time.Second, "Timeout duration in seconds for IPCache")

	// IPCacheUpdatePeriod determines how long to wait between cache-scrubbing attempts.
	IPCacheUpdatePeriod = flag.Duration("IPCacheUpdatePeriod", 1*time.Second, "We run the cache eviction loop with this frequency")
)

Types

type CacheTest

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

type RecentIPCache

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

RecentIPCache contains a list of all the IP addresses that we have traced to recently. We keep this list to ensure that we don't traceroute to the same location repeatedly at a high frequency.

func New

func New(ctx context.Context) *RecentIPCache

New creates and returns a RecentIPCache. It also starts up a background goroutine that scrubs the cache.

func (*RecentIPCache) Add

func (m *RecentIPCache) Add(ip string)

Add an IP to the cache.

func (*RecentIPCache) GetCacheLength

func (rc *RecentIPCache) GetCacheLength() int

func (*RecentIPCache) GetTestContent

func (rc *RecentIPCache) GetTestContent(ip string) string

func (*RecentIPCache) Has

func (m *RecentIPCache) Has(ip string) bool

Has tests whether an IP is in the cache.

func (*RecentIPCache) Trace

func (rc *RecentIPCache) Trace(conn connection.Connection, sc scamper.Tracer)

GetTrace returns test content in []byte given a connection and tracer