public void RegisterInstance(Instance instance)
{
if (Instances.SingleOrDefault(i => i.IpAddress.Equals(instance.IpAddress)) != null)
//instance already registered
//added as an additional guard after user reported Sequence error with use of
//SingleOrDefault in ApplyMachineInformation()
return;
string nodeText = instance.MachineName;
bool isThisPc = instance.MachineName.Equals(Environment.MachineName);
TreeNode node;
if (isThisPc)
{
ThisPCInstance = instance;
nodeText = ThisPCText;
node = treeView1.Nodes[0].Nodes.Insert(0, instance.IpAddress, nodeText);
}
else
{
node = treeView1.Nodes[0].Nodes.Add(instance.IpAddress, nodeText);
}
if (isThisPc)
{
node.Tag = 1;
node.ImageIndex = 4;
node.SelectedImageIndex = 4;
}
else
{
node.Tag = null;
node.ImageIndex = 1;
node.SelectedImageIndex = 1;
}
Instances.Add(instance);
instanceUpdateDates[instance] = DateTime.Now;
SortTree();
treeView1.Nodes[0].ExpandAll();
if (isThisPc)
treeView1.SelectedNode = node;
}
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 });
}
}
}
}
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
});
}
}
}
}
}
private static string GetMachineName(Instance instance)
{
string result = instance.MachineName;
bool isThisPc = result.Equals(Environment.MachineName);
if (isThisPc)
result = ThisPCText;
return result;
}
public void UnregisterInstance(Instance instance)
{
treeView1.Nodes[0].Nodes.RemoveByKey(instance.IpAddress);
Instances.Remove(instance);
instanceMachines.Remove(instance);
RefreshNetworkTotals();
}
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);
Data.Packet packet = JsonConvert.DeserializeObject<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 });
}
}
}
}
