public static void Send(IPAddress source, IPAddress destination, string verb, int fingerprint)
{
using (UdpClient client = new UdpClient(new IPEndPoint(source, 0)))
{
Data.Packet packet = new Data.Packet();
packet.MachineName = Environment.MachineName;
packet.Fingerprint = fingerprint;
packet.Verb = verb;
JavaScriptSerializer serializer = new JavaScriptSerializer();
string jsonData = serializer.Serialize(packet);
byte[] bytes = Encoding.ASCII.GetBytes(jsonData);
IPEndPoint ip = new IPEndPoint(destination, Config.Port);
try
{
client.Send(bytes, bytes.Length, ip);
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.HostUnreachable)
//reasoning: we broadcast on all interfaces
//on OS X this may result in No route to host
Console.WriteLine(String.Format("{0}: {1}", source, ex.Message));
else
throw;
}
finally
{
client.Close();
}
}
}
public static void Send(IPAddress ipAddress, string verb, int fingerprint)
{
using (UdpClient client = new UdpClient())
{
Data.Packet packet = new Data.Packet();
packet.MachineName = Environment.MachineName;
packet.Fingerprint = fingerprint;
packet.Verb = verb;
JavaScriptSerializer serializer = new JavaScriptSerializer();
string jsonData = serializer.Serialize(packet);
byte[] bytes = Encoding.ASCII.GetBytes(jsonData);
IPEndPoint ip = new IPEndPoint(ipAddress, Config.Port);
client.Send(bytes, bytes.Length, ip);
client.Close();
}
}
public static void Send(IPAddress ipAddress, string verb, int fingerprint)
{
using (UdpClient client = new UdpClient())
{
Data.Packet packet = new Data.Packet();
packet.MachineName = Environment.MachineName;
packet.Fingerprint = fingerprint;
packet.Verb = verb;
JavaScriptSerializer serializer = new JavaScriptSerializer();
string jsonData = serializer.Serialize(packet);
byte[] bytes = Encoding.ASCII.GetBytes(jsonData);
IPEndPoint ip = new IPEndPoint(ipAddress, Config.Port);
client.Send(bytes, bytes.Length, ip);
client.Close();
}
}
private static void Send(IPAddress source, IPAddress destination, string verb, int fingerprint)
{
using (UdpClient client = new UdpClient(new IPEndPoint(source, 0)))
{
Data.Packet packet = new Data.Packet();
packet.MachineName = Environment.MachineName;
packet.Fingerprint = fingerprint;
packet.Verb = verb;
JavaScriptSerializer serializer = new JavaScriptSerializer();
string jsonData = serializer.Serialize(packet);
byte[] bytes = Encoding.ASCII.GetBytes(jsonData);
IPEndPoint ip = new IPEndPoint(destination, Config.Port);
try
{
client.Send(bytes, bytes.Length, ip);
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.HostUnreachable)
{
//reasoning: we broadcast on all interfaces
//on OS X this may result in No route to host
Console.WriteLine(String.Format("{0}: {1}", source, ex.Message));
}
else
{
throw;
}
}
finally
{
client.Close();
}
}
}
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))
{
//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
});
}
}
}
}
}
