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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.
54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
package addressexchange
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import (
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"github.com/kaspanet/kaspad/app/appmessage"
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"github.com/kaspanet/kaspad/infrastructure/network/addressmanager"
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"github.com/kaspanet/kaspad/infrastructure/network/netadapter/router"
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"math/rand"
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)
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// SendAddressesContext is the interface for the context needed for the SendAddresses flow.
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type SendAddressesContext interface {
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AddressManager() *addressmanager.AddressManager
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}
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// SendAddresses sends addresses to a peer that requests it.
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func SendAddresses(context SendAddressesContext, incomingRoute *router.Route, outgoingRoute *router.Route) error {
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message, err := incomingRoute.Dequeue()
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if err != nil {
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return err
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}
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msgGetAddresses := message.(*appmessage.MsgRequestAddresses)
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addresses := context.AddressManager().AddressCache(msgGetAddresses.IncludeAllSubnetworks,
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msgGetAddresses.SubnetworkID)
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msgAddresses := appmessage.NewMsgAddresses(msgGetAddresses.IncludeAllSubnetworks, msgGetAddresses.SubnetworkID)
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err = msgAddresses.AddAddresses(shuffleAddresses(addresses)...)
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if err != nil {
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return err
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}
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return outgoingRoute.Enqueue(msgAddresses)
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}
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// shuffleAddresses randomizes the given addresses sent if there are more than the maximum allowed in one message.
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func shuffleAddresses(addresses []*appmessage.NetAddress) []*appmessage.NetAddress {
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addressCount := len(addresses)
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if addressCount < appmessage.MaxAddressesPerMsg {
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return addresses
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}
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shuffleAddresses := make([]*appmessage.NetAddress, addressCount)
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copy(shuffleAddresses, addresses)
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rand.Shuffle(addressCount, func(i, j int) {
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shuffleAddresses[i], shuffleAddresses[j] = shuffleAddresses[j], shuffleAddresses[i]
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})
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// Truncate it to the maximum size.
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shuffleAddresses = shuffleAddresses[:appmessage.MaxAddressesPerMsg]
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return shuffleAddresses
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}
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