private void ProcessReceived(IPEndPoint source, byte[] bytes)
{
//only response to discovery on the local network since we transfer fingerprints
if ((source.AddressFamily != AddressFamily.InterNetwork) &&
(source.AddressFamily != AddressFamily.InterNetworkV6))
{
return;
}
string jsonData = Encoding.ASCII.GetString(bytes);
JavaScriptSerializer serializer = new JavaScriptSerializer();
Data.Packet packet = serializer.Deserialize <Data.Packet>(jsonData);
if (packet.Verb.Equals(Verbs.Online))
{
//lock for thread-safety, otherwise the dupe check below may not be sound
lock (instances)
{
//search by MachineName and Fingerprint - these are unique while IP address may not be
//reasoning - the same machine may have multiple IP addresses as discovery supports multiple interfaces
if (!instances.Any(i => i.MachineName.Equals(packet.MachineName) && (i.Fingerprint == packet.Fingerprint)))
{
Data.Instance instance = new Data.Instance
{
IpAddress = source.Address.ToString(),
MachineName = packet.MachineName,
Fingerprint = packet.Fingerprint
};
instances.Add(instance);
Sender.Send(source.Address, Verbs.Online, fingerprint);
if (InstanceOnline != null)
{
InstanceOnline(this, new InstanceChangedArgs {
Instance = instance
});
}
}
}
}
else if (packet.Verb.Equals(Verbs.Offline))
{
string ipAddress = source.Address.ToString();
//lock for thread-safety - collection may be modified
lock (instances)
{
//search by MachineName and Fingerprint - these are unique while IP address may not be
//reasoning - the same machine may have multiple IP addresses as discovery supports multiple interfaces
Data.Instance instance = instances.SingleOrDefault(i => i.MachineName.Equals(packet.MachineName) && (i.Fingerprint == packet.Fingerprint));
if (instance != null)
{
instances.Remove(instance);
if (InstanceOffline != null)
{
InstanceOffline(this, new InstanceChangedArgs {
Instance = instance
});
}
}
}
}
}
private void ProcessReceived(IPEndPoint source, byte[] bytes)
{
//only response to discovery on the local network since we transfer fingerprints
if ((source.AddressFamily != AddressFamily.InterNetwork) &&
(source.AddressFamily != AddressFamily.InterNetworkV6))
{
return;
}
string jsonData = Encoding.ASCII.GetString(bytes);
JavaScriptSerializer serializer = new JavaScriptSerializer();
Data.Packet packet = serializer.Deserialize <Data.Packet>(jsonData);
if (packet.Verb.Equals(Verbs.Online))
{
string ipAddress = source.Address.ToString();
if (!instances.Any(i => i.IpAddress.Equals(ipAddress)))
{
Data.Instance instance = new Data.Instance
{
IpAddress = ipAddress,
MachineName = packet.MachineName,
Fingerprint = packet.Fingerprint
};
//lock for thread-safety - collection may be modified
lock (instances)
{
instances.Add(instance);
}
Sender.Send(source.Address, Verbs.Online, fingerprint);
if (InstanceOnline != null)
{
InstanceOnline(this, new InstanceChangedArgs {
Instance = instance
});
}
}
}
else if (packet.Verb.Equals(Verbs.Offline))
{
string ipAddress = source.Address.ToString();
//lock for thread-safety - collection may be modified
lock (instances)
{
Data.Instance instance = instances.SingleOrDefault(i => i.IpAddress.Equals(ipAddress));
if (instance != null)
{
instances.Remove(instance);
if (InstanceOffline != null)
{
InstanceOffline(this, new InstanceChangedArgs {
Instance = instance
});
}
}
}
}
}
public static void Broadcast(string verb, int fingerprint)
{
Sender.Send(IPAddress.Broadcast, verb, fingerprint);
}