mirror of
https://github.com/kaspanet/kaspad.git
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d14809694f
* [NOD-1223] Delete unused files/packages. * [NOD-1223] Move signal and limits to the os package. * [NOD-1223] Put database and dbaccess into the db package. * [NOD-1223] Fold the logs package into the logger package. * [NOD-1223] Rename domainmessage to appmessage. * [NOD-1223] Rename to/from DomainMessage to AppMessage. * [NOD-1223] Move appmessage to the app packge. * [NOD-1223] Move protocol to the app packge. * [NOD-1223] Move the network package to the infrastructure packge. * [NOD-1223] Rename cmd to executables. * [NOD-1223] Fix go.doc in the logger package.
108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
// Copyright (c) 2013-2014 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package addressmanager
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import (
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"github.com/kaspanet/kaspad/app/appmessage"
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"github.com/kaspanet/kaspad/util/mstime"
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"time"
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"github.com/kaspanet/kaspad/util/subnetworkid"
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)
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// KnownAddress tracks information about a known network address that is used
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// to determine how viable an address is.
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type KnownAddress struct {
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netAddress *appmessage.NetAddress
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sourceAddress *appmessage.NetAddress
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attempts int
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lastAttempt mstime.Time
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lastSuccess mstime.Time
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tried bool
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referenceCount int // reference count of new buckets
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subnetworkID *subnetworkid.SubnetworkID
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isBanned bool
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bannedTime mstime.Time
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}
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// NetAddress returns the underlying appmessage.NetAddress associated with the
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// known address.
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func (ka *KnownAddress) NetAddress() *appmessage.NetAddress {
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return ka.netAddress
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}
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// SubnetworkID returns the subnetwork ID of the known address.
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func (ka *KnownAddress) SubnetworkID() *subnetworkid.SubnetworkID {
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return ka.subnetworkID
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}
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// LastAttempt returns the last time the known address was attempted.
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func (ka *KnownAddress) LastAttempt() mstime.Time {
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return ka.lastAttempt
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}
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// chance returns the selection probability for a known address. The priority
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// depends upon how recently the address has been seen, how recently it was last
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// attempted and how often attempts to connect to it have failed.
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func (ka *KnownAddress) chance() float64 {
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now := mstime.Now()
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lastAttempt := now.Sub(ka.lastAttempt)
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if lastAttempt < 0 {
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lastAttempt = 0
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}
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c := 1.0
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// Very recent attempts are less likely to be retried.
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if lastAttempt < 10*time.Minute {
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c *= 0.01
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}
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// Failed attempts deprioritise.
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for i := ka.attempts; i > 0; i-- {
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c /= 1.5
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}
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return c
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}
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// isBad returns true if the address in question has not been tried in the last
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// minute and meets one of the following criteria:
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// 1) It claims to be from the future
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// 2) It hasn't been seen in over a month
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// 3) It has failed at least three times and never succeeded
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// 4) It has failed ten times in the last week
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// All addresses that meet these criteria are assumed to be worthless and not
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// worth keeping hold of.
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func (ka *KnownAddress) isBad() bool {
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if ka.lastAttempt.After(mstime.Now().Add(-1 * time.Minute)) {
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return false
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}
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// From the future?
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if ka.netAddress.Timestamp.After(mstime.Now().Add(10 * time.Minute)) {
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return true
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}
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// Over a month old?
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if ka.netAddress.Timestamp.Before(mstime.Now().Add(-1 * numMissingDays * time.Hour * 24)) {
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return true
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}
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// Never succeeded?
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if ka.lastSuccess.IsZero() && ka.attempts >= numRetries {
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return true
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}
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// Hasn't succeeded in too long?
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if !ka.lastSuccess.After(mstime.Now().Add(-1*minBadDays*time.Hour*24)) &&
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ka.attempts >= maxFailures {
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return true
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}
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return false
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}
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