public void PerformRequest()
{
ResponseMessage = null;
WaitHandle.Reset();
EndPoint epStun = SocketServer.ConnectMgr.GetIPEndpoint(StunServer, StunPort);
STUNMessage msgRequest = new STUNMessage();
msgRequest.Method = StunMethod.Binding;
msgRequest.Class = StunClass.Request;
MappedAddressAttribute mattr = new MappedAddressAttribute();
mattr.IPAddress = LocalEndpoint.Address;
mattr.Port = (ushort) LocalEndpoint.Port;
msgRequest.AddAttribute(mattr);
SocketServer.UDPSocketClient client = new SocketServer.UDPSocketClient(LocalEndpoint);
client.OnReceivePacket += new SocketServer.UDPSocketClient.DelegateReceivePacket(client_OnReceivePacket3);
#if !WINDOWS_PHONE
client.StartReceiving(true);
#else
client.StartReceiving();
#endif
byte [] bMessage = msgRequest.Bytes;
client.SendUDP(bMessage, bMessage.Length, epStun);
}
/// <summary>
/// Read the next attribute from the stream
/// </summary>
/// <param name="bBytes"></param>
/// <param name="parentmessage"></param>
/// <returns>The number of bytes read, or 0 if no more can be read</returns>
public int ReadFromBytes(byte[] bBytes, int nAt, bool bDwordAlign, STUNMessage parentmessage)
{
if ((bBytes.Length - nAt) < 4)
return 0;
ushort nType = (ushort)((bBytes[0 + nAt] << 8) | bBytes[1 + nAt]);
ushort nLength = (ushort)((bBytes[2 + nAt] << 8) | bBytes[3 + nAt]);
if (bDwordAlign == true)
{
while ((nLength % 4) != 0)
nLength++;
}
if ((bBytes.Length-nAt) < (nLength - 4))
return 0;
byte[] bAttribute = new byte[nLength];
Array.Copy(bBytes, 4+nAt, bAttribute, 0, bAttribute.Length);
BuildAttribute(nType, bAttribute, bDwordAlign, parentmessage);
return 4 + nLength;
}
public virtual void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
Software = System.Text.UTF8Encoding.UTF8.GetString(m_bBytes, 0, m_bBytes.Length);
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
Priority = (int) SocketServer.TLS.ByteHelper.ReadUintBigEndian(bBytes, 0);
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
}
public void ComputeHMACShortTermCredentials(STUNMessage msgWithoutHMAC, int nLengthWithoutMessageIntegrity, string strPassword)
{
if (strPassword == null)
strPassword = "";
/// No MD5 on short term credentials
byte[] bKey = System.Text.UTF8Encoding.UTF8.GetBytes(strPassword);
byte[] bBytes = msgWithoutHMAC.Bytes;
System.Security.Cryptography.HMACSHA1 sha1 = new System.Security.Cryptography.HMACSHA1(bKey);
HMAC = sha1.ComputeHash(bBytes, 0, nLengthWithoutMessageIntegrity);
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
if (m_bBytes.Length < 8) // somethin rong
return;
AddressFamily = (StunAddressFamily)m_bBytes[1];
Port = (ushort)((m_bBytes[2] << 8) | (m_bBytes[3]));
int nIPLength = 4;
if (AddressFamily == RTP.StunAddressFamily.IPv6)
nIPLength = 16;
byte[] bIPAddress = new byte[nIPLength];
Array.Copy(m_bBytes, 4, bIPAddress, 0, nIPLength);
IPAddress = new IPAddress(bIPAddress);
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
Class = (byte)(bBytes[2] & 0x07);
Number = bBytes[3];
ReasonPhrase = System.Text.UTF8Encoding.UTF8.GetString(m_bBytes, 1, m_bBytes.Length - 1);
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
byte[] bPhrase = System.Text.UTF8Encoding.UTF8.GetBytes(ReasonPhrase);
m_bBytes = new byte[bPhrase.Length + 4];
m_bBytes[2] = (byte)(Class & 0x07);
m_bBytes[2] = (byte)Number;
Array.Copy(bPhrase, 0, m_bBytes, 1, bPhrase.Length);
return m_bBytes;
}
void client_OnReceivePacket3(byte[] bData, int nLength, IPEndPoint epfrom, IPEndPoint epthis, DateTime dtReceived)
{
ResponseMessage = new STUNMessage();
ResponseMessage.Bytes = bData;
WaitHandle.Set();
}
public IPEndPoint RecvSTUN(DnsEndPoint serverEp,int timeout)
{
byte[] recv = RTPUDPClient.ReceiveByteArray(serverEp.Port,timeout);
STUNMessage ResponseMessage = new STUNMessage();
ResponseMessage.Bytes = recv;
IPEndPoint retep = LocalEndpoint;
if (ResponseMessage != null)
{
foreach (STUNAttributeContainer cont in ResponseMessage.Attributes)
{
if (cont.ParsedAttribute.Type == StunAttributeType.MappedAddress)
{
MappedAddressAttribute attrib = cont.ParsedAttribute as MappedAddressAttribute;
retep = new IPEndPoint(attrib.IPAddress, attrib.Port);
}
}
}
return retep;
}
void RTPUDPClient_OnReceiveMessage(byte[] bData, int nLength, IPEndPoint epfrom, IPEndPoint epthis, DateTime dtReceived)
{
/// if we are an performing ICE, see if this is an ICE packet instead of an RTP one
if (nLength >= 8)
{
//0x2112A442
if ((bData[4] == 0x21) && (bData[5] == 0x12) && (bData[6] == 0xA4) && (bData[7] == 0x42))
{
/// STUN message
STUNMessage smsg = new STUN2Message();
byte[] bStun = new byte[nLength];
Array.Copy(bData, 0, bStun, 0, nLength);
try
{
smsg.Bytes = bStun;
}
catch (Exception ex)
{
smsg = new STUNMessage();
smsg.Bytes = bStun;
}
STUNRequestResponse foundreq = null;
lock (StunLock)
{
foreach (STUNRequestResponse queuedreq in StunRequestResponses)
{
if (queuedreq.IsThisYourResponseSetIfItIs(smsg) == true)
{
foundreq = queuedreq;
break;
}
}
if (foundreq != null)
{
StunRequestResponses.Remove(foundreq);
return;
}
}
if (OnUnhandleSTUNMessage != null)
{
OnUnhandleSTUNMessage(smsg, epfrom);
}
return;
}
}
RTPPacket packet = RTPPacket.BuildPacket(bData, 0, nLength);
if (packet != null) /// Seems we get some TURN channel data messages from google talk
{
if (ReceiveSSRC == 0)
{
ReceiveSSRC = packet.SSRC;
}
if ((packet.PayloadType == this.Payload) && (packet.SSRC == this.ReceiveSSRC))
{
IncomingRTPPacketBuffer.AddPacket(packet);
}
}
}
public int SendSTUNMessage(STUNMessage msg, EndPoint epStun)
{
byte[] bMessage = msg.Bytes;
return(this.RTPUDPClient.SendUDP(bMessage, bMessage.Length, epStun));
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
return new byte[] {};
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
byte[] bIPaddress = IPAddress.GetAddressBytes();
m_bBytes = new byte[4 + bIPaddress.Length];
m_bBytes[0] = 0;
m_bBytes[1] = (byte)AddressFamily;
m_bBytes[2] = (byte)((Port & 0xFF00) >> 8);
m_bBytes[3] = (byte)(Port & 0xFF);
Array.Copy(bIPaddress, 0, m_bBytes, 4, 4);
return m_bBytes;
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
byte[] bMagicCookie = new byte[4];
bMagicCookie[0] = (byte)((parentmessage.MagicCookie & 0xFF000000) >> 24);
bMagicCookie[1] = (byte)((parentmessage.MagicCookie & 0x00FF0000) >> 16);
bMagicCookie[2] = (byte)((parentmessage.MagicCookie & 0x0000FF00) >> 08);
bMagicCookie[3] = (byte)((parentmessage.MagicCookie & 0x000000FF) >> 00);
byte[] bIPAddress = IPAddress.GetAddressBytes();
m_bBytes = new byte[4 + bIPAddress.Length];
m_bBytes[0] = 0;
m_bBytes[1] = (byte)AddressFamily;
m_bBytes[2] = (byte)(((Port & 0xFF00) >> 8) ^ bMagicCookie[0]);
m_bBytes[3] = (byte)((Port & 0xFF) ^ bMagicCookie[1]);
byte[] bXOR = new byte[16];
Array.Copy(bMagicCookie, 0, bXOR, 0, 4);
Array.Copy(parentmessage.TransactionId, 0, bXOR, 4, parentmessage.TransactionId.Length);
for (int i = 0; i < bIPAddress.Length; i++)
{
bIPAddress[i] ^= bXOR[i];
}
Array.Copy(bIPAddress, 0, m_bBytes, 4, bIPAddress.Length);
return m_bBytes;
}
public void ComputeHMACLongTermCredentials(STUNMessage msgWithoutHMAC, int nLengthWithoutMessageIntegrity, string strUserName, string strRealm, string strPassword)
{
string strKey = string.Format("{0}:{1}:{2}", strUserName, strRealm, strPassword);
System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] bKey = md5.ComputeHash(System.Text.UTF8Encoding.UTF8.GetBytes(strKey));
byte[] bBytes = msgWithoutHMAC.Bytes;
System.Security.Cryptography.HMACSHA1 sha1 = new System.Security.Cryptography.HMACSHA1(bKey);
HMAC = sha1.ComputeHash(bBytes, 0, nLengthWithoutMessageIntegrity);
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
if (m_bBytes.Length < 8) // somethin rong
return;
byte[] bMagicCookie = new byte[4];
bMagicCookie[0] = (byte)((parentmessage.MagicCookie & 0xFF000000) >> 24);
bMagicCookie[1] = (byte)((parentmessage.MagicCookie & 0x00FF0000) >> 16);
bMagicCookie[2] = (byte)((parentmessage.MagicCookie & 0x0000FF00) >> 08);
bMagicCookie[3] = (byte)((parentmessage.MagicCookie & 0x000000FF) >> 00);
AddressFamily = (StunAddressFamily)m_bBytes[1];
Port = (ushort)(((m_bBytes[2] << 8) ^ bMagicCookie[0]) | (m_bBytes[3] ^ bMagicCookie[1]));
int nIPLength = 4;
if (AddressFamily == RTP.StunAddressFamily.IPv6)
nIPLength = 16;
byte[] bIPAddress = new byte[nIPLength];
Array.Copy(m_bBytes, 4, bIPAddress, 0, nIPLength);
byte[] bXOR = new byte[16];
Array.Copy(bMagicCookie, 0, bXOR, 0, 4);
Array.Copy(parentmessage.TransactionId, 0, bXOR, 4, parentmessage.TransactionId.Length);
for (int i = 0; i < bIPAddress.Length; i++)
{
bIPAddress[i] ^= bXOR[i];
}
IPAddress = new IPAddress(bIPAddress);
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
return m_bBytes;
}
public void ComputeCRC(STUNMessage msg, int nLengthWithoutFingerprint)
{
byte [] bMessage = msg.Bytes;
CRC = 0xffffffff;
for(int n = 0; n < nLengthWithoutFingerprint; ++n)
CRC = (CRC >> 8) ^ (crctable[(CRC & 0xff) ^ bMessage[n]]);
CRC ^= 0xffffffff;
// XOR the result with 0x5354554e
CRC ^= 0x5354554e;
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
m_bBytes = SocketServer.TLS.ByteHelper.GetBytesForInt32(Priority, SocketServer.TLS.Endianess.Big);
return m_bBytes;
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
return SocketServer.TLS.ByteHelper.GetBytesForUint64(RandomNumber, SocketServer.TLS.Endianess.Big);
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
m_bBytes = System.Text.UTF8Encoding.UTF8.GetBytes(Software);
return m_bBytes;
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
m_bBytes = bBytes;
RandomNumber = SocketServer.TLS.ByteHelper.ReadULongBigEndian(m_bBytes, 0);
}
public virtual byte[] GetBytes(STUNMessage parentmessage)
{
return m_bBytes;
}
public override byte[] GetBytes(STUNMessage parentmessage)
{
m_bBytes = new byte[4];
if (ChangeIP == true)
m_bBytes[3] |= 0x04;
if (ChangePort == true)
m_bBytes[3] |= 0x02;
return m_bBytes;
}
public byte[] GetBytes(STUNMessage parentmessage, bool bDwordAlign)
{
byte[] bAttribute = m_objParsedAttribute.GetBytes(parentmessage);
int nLength = bAttribute.Length + 4;
if (bDwordAlign == true)
{
while ((nLength % 4) != 0)
nLength++;
}
m_bValue = new byte[nLength];
Length = (ushort) bAttribute.Length;
m_bValue[0] = (byte)(((int)m_objParsedAttribute.Type & 0xFF00) >> 8);
m_bValue[1] = (byte)(((int)m_objParsedAttribute.Type & 0x00FF) >> 0);
m_bValue[2] = (byte)(((int)Length & 0xFF00) >> 8);
m_bValue[3] = (byte)(((int)Length & 0x00FF) >> 0);
Array.Copy(bAttribute, 0, m_bValue, 4, bAttribute.Length);
return m_bValue;
}
public override void SetBytes(byte[] bBytes, STUNMessage parentmessage)
{
ChangeIP = ((m_bBytes[3] & 0x04) > 0) ? true : false;
ChangePort = ((m_bBytes[3] & 0x02) > 0) ? true : false;
}
void BuildAttribute(ushort nType, byte[] bAttribute, bool bDwordAlign, STUNMessage parentmessage)
{
if (nType == (ushort)StunAttributeType.MappedAddress)
{
m_objParsedAttribute = new MappedAddressAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.AlternateServer)
{
m_objParsedAttribute = new AlternateServerAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.ErrorCode)
{
m_objParsedAttribute = new ErrorCodeAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.MessageIntegrity)
{
m_objParsedAttribute = new MessageIntegrityAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.Fingerprint)
{
m_objParsedAttribute = new FingerPrintAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.Nonce)
{
m_objParsedAttribute = new NonceAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.Realm)
{
m_objParsedAttribute = new RealmAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.Software)
{
m_objParsedAttribute = new SoftwareAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.UserName)
{
m_objParsedAttribute = new UserNameAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.Password)
{
m_objParsedAttribute = new PasswordAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.XorMappedAddress)
{
m_objParsedAttribute = new XORMappedAddressAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.LegacySourceAddress)
{
m_objParsedAttribute = new LegacySourceAddressAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.LegacyResponseAddress)
{
m_objParsedAttribute = new LegacyResponseAddressAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.LegacyChangeAddress)
{
m_objParsedAttribute = new LegacyChangeAddressAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.LegacyChangedAddress)
{
m_objParsedAttribute = new LegacyChangedAddressAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.Priority)
{
m_objParsedAttribute = new PriorityAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.UseCandidate)
{
m_objParsedAttribute = new UseCandidateAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.IceControlled)
{
m_objParsedAttribute = new IceControlledAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else if (nType == (ushort)StunAttributeType.IceControlling)
{
m_objParsedAttribute = new IceControllingAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
else
{
m_objParsedAttribute = new STUNAttribute();
m_objParsedAttribute.SetBytes(bAttribute, parentmessage);
}
}
public STUNRequestResponse(STUNMessage requestmessage)
{
RequestMessage = requestmessage;
}
