private void Send_Ping(ClientInfo client)
{
client.NextPing = Core.TimeNow.AddSeconds(client.PingTimeout);
LocationPing ping = new LocationPing();
ping.RemoteVersion = client.Data.Version;
Network.LightComm.SendReliable(client, ServiceID, 0, ping);
}
void Receive_Ping(DhtClient client, LocationPing ping)
{
if (Core.User.Settings.Invisible)
{
return;
}
LocationNotify notify = new LocationNotify();
RecentPings.AddFirst(Core.TimeNow);
while (RecentPings.Count > 30)
{
RecentPings.RemoveLast();
}
// we want a target of 20 pings per minute ( 1 every 3 seconds)
// pings per minute = RecentPings.count / (Core.TimeNow - RecentPings.Last).ToMinutes()
float pingsPerMinute = (float)RecentPings.Count / (float)(Core.TimeNow - RecentPings.Last.Value).Minutes;
notify.Timeout = (int)(60.0 * pingsPerMinute / 20.0); // 20 is target rate, so if we have 40ppm, multiplier is 2, timeout 120seconds
notify.Timeout = Math.Max(60, notify.Timeout); // use 60 as lowest timeout
CurrentTimeout = notify.Timeout;
if (ping.RemoteVersion < LocalClient.Data.Version)
{
notify.SignedLocation = LocalClient.SignedData;
}
if (PendingNotifications.Contains(client))
{
PendingNotifications.Remove(client);
}
//put node on interested list
NotifyUsers[client] = Core.TimeNow.AddSeconds(notify.Timeout + 15);
// *** small security concern, notifies are not signed so they could be forged
// signing vs unsigning is 144 vs 7 bytes, the bandwidth benefits outweigh forging
// someone's online status at the moment
// byte[] unsigned = notify.Encode(Network.Protocol);
// byte[] signed = SignedData.Encode(Network.Protocol, Core.User.Settings.KeyPair, notify);
Network.LightComm.SendReliable(client, ServiceID, 0, notify);
}
void LightComm_ReceiveData(DhtClient client, byte[] data)
{
G2Header root = new G2Header(data);
if (G2Protocol.ReadPacket(root))
{
if (root.Name == LocationPacket.Ping)
{
Receive_Ping(client, LocationPing.Decode(root));
}
if (root.Name == LocationPacket.Notify)
{
Receive_Notify(client, LocationNotify.Decode(root));
}
}
}
public static LocationPing Decode(G2Header root)
{
LocationPing ping = new LocationPing();
G2Header child = new G2Header(root.Data);
while (G2Protocol.ReadNextChild(root, child) == G2ReadResult.PACKET_GOOD)
{
if (!G2Protocol.ReadPayload(child))
{
continue;
}
switch (child.Name)
{
case Packet_RemoteVersion:
ping.RemoteVersion = CompactNum.ToUInt32(child.Data, child.PayloadPos, child.PayloadSize);
break;
}
}
return(ping);
}
public static LocationPing Decode(G2Header root)
{
LocationPing ping = new LocationPing();
G2Header child = new G2Header(root.Data);
while (G2Protocol.ReadNextChild(root, child) == G2ReadResult.PACKET_GOOD)
{
if (!G2Protocol.ReadPayload(child))
continue;
switch (child.Name)
{
case Packet_RemoteVersion:
ping.RemoteVersion = CompactNum.ToUInt32(child.Data, child.PayloadPos, child.PayloadSize);
break;
}
}
return ping;
}
