public void Close()
{
//Debug.Log( "CLOSE" );
if (_socket != null)
{
// Drop multicast group.
if (!string.IsNullOrEmpty(_multicastAddress))
{
IPAddress multicastIp = IPAddress.Parse(_multicastAddress);
try {
if (multicastIp.AddressFamily == AddressFamily.InterNetwork)
{
MulticastOption mcOpt = new MulticastOption(multicastIp);
_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.DropMembership, mcOpt);
}
else
{
StringBuilder sb = OscDebug.BuildText(this);
sb.Append("IvP6 not supported\n");
Debug.LogWarning(sb.ToString());
}
} catch {
// Ignore.
}
}
// Close.
_socket.Close();
}
_socket = null;
_isOpen = false;
}
/// <summary>
/// Tries to evaluate byte count prefix of a blob and evaluate it.
/// </summary>
// TODO When .Net 4.5 becomes available in Unity: Replace IList<T> with IReadOnlyList<T> since we want to pass Array where number and order of list elements is read-only.
public static bool TryReadAndEvaluateByteCountPrefix(IList <byte> data, int index, out int byteCountPrefixValue)
{
FourByteOscData byteCountPrefix;
if (!FourByteOscData.TryReadFrom(data, ref index, out byteCountPrefix))
{
// Not enough space for byte count prefix in data array.
byteCountPrefixValue = 0;
StringBuilder sb = OscDebug.BuildText();
sb.Append("Blob is missing byte count prefix.\n");
Debug.LogWarning(sb.ToString());
return(false);
}
int multipleOfFourByteCount = ((byteCountPrefix.intValue + 3) / 4) * 4; // Multiple of four bytes.
if (index + multipleOfFourByteCount > data.Count)
{
// Not enough space for blob in data array.
byteCountPrefixValue = 0;
StringBuilder sb = OscDebug.BuildText();
sb.Append("Blob data is incomplete.\n");
Debug.LogWarning(sb.ToString());
return(false);
}
byteCountPrefixValue = byteCountPrefix.intValue;
return(true);
}
void ReceiveComplete(IAsyncResult asyncResult)
{
if (_socket == null)
{
return;
}
try {
// Get the data and copy it to another buffer for exposure.
int byteCount = _socket.EndReceiveFrom(asyncResult, ref _tempRemoteEndPoint);
Buffer.BlockCopy(_buffer, 0, _exposedBuffer, 0, byteCount);
// Immediately start receving again.
if (_isOpen)
{
BeginRecieve();
}
// Invoke callback with the exposed buffer.
if (byteCount > 0)
{
_onDatagramReceivedAsyncCallback(_exposedBuffer, byteCount);
}
} catch (Exception e) {
if (e is ObjectDisposedException)
{
// Ignore.
}
else
{
StringBuilder sb = OscDebug.BuildText(this);
sb.Append("Error occurred while receiving message.\n"); sb.Append(e);
Debug.LogWarning(sb.ToString());
}
}
}
public bool Open(int port, string multicastAddress = "")
{
//Debug.Log( "OPEN " + Application.isPlaying );
if (_isOpen)
{
Close();
}
// "Do not attempt to reuse the Socket after closing".
// https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socket.shutdown?view=netframework-4.7.2
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
// Ensure that we can have multiple OscIn objects listening to the same port. Must be set before bind.
// Note that only one OscIn object will receive the packet anyway: http://stackoverflow.com/questions/22810511/bind-multiple-listener-to-the-same-port
_socket.ExclusiveAddressUse = false;
_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
_port = port;
_multicastAddress = multicastAddress;
try {
// "Before calling BeginReceiveFrom, you must explicitly bind the Socket to a local endpoint using the Bind method,"
// https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.socket.beginreceivefrom?view=netframework-4.7.2
IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, _port);
_socket.Bind(localEndPoint);
// Join multicast group if in multicast mode.
if (!string.IsNullOrEmpty(_multicastAddress))
{
IPAddress multicastIp = IPAddress.Parse(_multicastAddress);
if (multicastIp.AddressFamily == AddressFamily.InterNetwork)
{
MulticastOption mcOpt = new MulticastOption(multicastIp);
_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, mcOpt);
}
else
{
StringBuilder sb = OscDebug.BuildText(this);
sb.Append("IvP6 not supported\n");
Debug.LogWarning(sb.ToString());
return(false);
}
_socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.MulticastTimeToLive, OscConst.timeToLive);
}
// Let's begin!
BeginRecieve();
} catch (Exception e) {
// Socket error reference: https://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx
Debug.Log(e);
if (e is SocketException && (e as SocketException).ErrorCode == 10048) // "Address already in use"
{
StringBuilder sb = OscDebug.BuildText(this);
sb.Append("Could not open port "); sb.Append(_port); sb.Append(" because another application is listening on it.\n");
Debug.LogWarning(sb.ToString());
}
else if (e is SocketException && !string.IsNullOrEmpty(multicastAddress))
{
StringBuilder sb = OscDebug.BuildText(this);
sb.Append("Could not subscribe to multicast group. Perhaps you are offline, or your router does not support multicast.");
sb.Append((e as SocketException).ErrorCode); sb.Append(": "); sb.Append(e.ToString());
Debug.LogWarning(sb.ToString());
}
else if (e.Data is ArgumentOutOfRangeException)
{
StringBuilder sb = OscDebug.BuildText(this);
sb.Append("Could not open port "); sb.Append(_port); sb.Append(". Invalid Port Number.\n"); sb.Append(e);
Debug.LogWarning(sb.ToString());
}
else
{
//Debug.Log( e );
}
Close();
return(false);
}
_isOpen = true;
return(true);
}
public bool TrySendBuffer(byte[] buffer, int byteCount)
{
if (_endPoint == null)
{
return(false);
}
try {
//Debug.Log( $"Actually sending { string.Join( ",", _cache ) }" );
//Debug.Log( "Sending bytes: " + byteCount + ". Frame: " + Time.frameCount + "\n");
//Debug.Log( "Sending to " + _endPoint );
// Send!!
_socket.SendTo(buffer, byteCount, SocketFlags.None, _endPoint);
// Socket error reference: https://msdn.microsoft.com/en-us/library/windows/desktop/ms740668(v=vs.85).aspx
} catch (SocketException ex) {
if (ex.ErrorCode == 10051) // "Network is unreachable"
// Ignore. We get this when broadcasting while having no access to a network.
{
}
else if (ex.ErrorCode == 10065) // "No route to host"
// Ignore. We get this sometimes when unicasting.
{
}
else if (ex.ErrorCode == 10049) // "The requested address is not valid in this context"
// Ignore. We get this when we broadcast and have no access to the local network. For example if we are using a VPN.
{
}
else if (ex.ErrorCode == 10061) // "Connection refused"
// Ignore.
{
}
else if (ex.ErrorCode == 10064) // "Host is down"
// Ignore. We get this when the remote target is not found.
{
}
else if (ex.ErrorCode == 10040) // "Message too long"
{
if (OscGlobals.logWarnings)
{
Debug.LogWarning(
OscDebug.BuildText(this).Append("Failed to send message. Packet size at ")
.AppendGarbageFree(byteCount).Append(" bytes exceeds udp buffer size at ")
.AppendGarbageFree(_socket.SendBufferSize)
.Append(" Try increasing the buffer size.\n").Append(ex)
);
}
}
else
{
if (OscGlobals.logWarnings)
{
Debug.LogWarning(
OscDebug.BuildText(this).Append("Failed to send message to ")
.Append(_endPoint.Address).Append(" on port ").AppendGarbageFree(_endPoint.Port)
.Append(".\n").Append(ex)
);
}
}
return(false);
} catch (Exception ex) {
if (OscGlobals.logWarnings)
{
Debug.LogWarning(
OscDebug.BuildText(this).Append("Failed to send message to ")
.Append(_endPoint.Address).Append(" on port ").AppendGarbageFree(_endPoint.Port)
.Append(".\n").Append(ex)
);
}
return(false);
}
return(true);
}
