public void TellRemoteEndToUseThisPair(RTPStream stream, string strUsername, string strPassword)
{
if (IsControlling == false)
{
throw new Exception("Only controlling endpoint can send a usecandidate attribute");
}
STUN2Message msgRequest = new STUN2Message();
msgRequest.Method = StunMethod.Binding;
msgRequest.Class = StunClass.Request;
PriorityAttribute pattr = new PriorityAttribute();
pattr.Priority = (int)CalculatePriority(110, 30, this.LocalCandidate.component); ///Peer reflexive, not sure of the purpose of this yet //this.Priority;
msgRequest.AddAttribute(pattr);
IceControllingAttribute cattr = new IceControllingAttribute();
msgRequest.AddAttribute(cattr);
UseCandidateAttribute uattr = new UseCandidateAttribute();
msgRequest.AddAttribute(uattr);
if (strUsername != null)
{
UserNameAttribute unameattr = new UserNameAttribute();
unameattr.UserName = strUsername;
msgRequest.AddAttribute(unameattr);
}
/// Add message integrity, computes over all the items currently added
///
int nLengthWithoutMessageIntegrity = msgRequest.Bytes.Length;
MessageIntegrityAttribute mac = new MessageIntegrityAttribute();
msgRequest.AddAttribute(mac);
mac.ComputeHMACShortTermCredentials(msgRequest, nLengthWithoutMessageIntegrity, strPassword);
/// Add fingerprint
///
int nLengthWithoutFingerPrint = msgRequest.Bytes.Length;
FingerPrintAttribute fattr = new FingerPrintAttribute();
msgRequest.AddAttribute(fattr);
fattr.ComputeCRC(msgRequest, nLengthWithoutFingerPrint);
foreach (int nNextTimeout in Timeouts)
{
STUNMessage ResponseMessage = stream.SendRecvSTUN(this.RemoteCandidate.IPEndPoint, msgRequest, nNextTimeout);
if (ResponseMessage != null)
{
break;
}
}
}
public void TellRemoteEndToUseThisPair(RTPStream stream, string strUsername, string strPassword)
{
if (IsControlling == false)
throw new Exception("Only controlling endpoint can send a usecandidate attribute");
STUN2Message msgRequest = new STUN2Message();
msgRequest.Method = StunMethod.Binding;
msgRequest.Class = StunClass.Request;
PriorityAttribute pattr = new PriorityAttribute();
pattr.Priority = (int)CalculatePriority(110, 30, this.LocalCandidate.component); ///Peer reflexive, not sure of the purpose of this yet //this.Priority;
msgRequest.AddAttribute(pattr);
IceControllingAttribute cattr = new IceControllingAttribute();
msgRequest.AddAttribute(cattr);
UseCandidateAttribute uattr = new UseCandidateAttribute();
msgRequest.AddAttribute(uattr);
if (strUsername != null)
{
UserNameAttribute unameattr = new UserNameAttribute();
unameattr.UserName = strUsername;
msgRequest.AddAttribute(unameattr);
}
/// Add message integrity, computes over all the items currently added
///
int nLengthWithoutMessageIntegrity = msgRequest.Bytes.Length;
MessageIntegrityAttribute mac = new MessageIntegrityAttribute();
msgRequest.AddAttribute(mac);
mac.ComputeHMACShortTermCredentials(msgRequest, nLengthWithoutMessageIntegrity, strPassword);
/// Add fingerprint
///
int nLengthWithoutFingerPrint = msgRequest.Bytes.Length;
FingerPrintAttribute fattr = new FingerPrintAttribute();
msgRequest.AddAttribute(fattr);
fattr.ComputeCRC(msgRequest, nLengthWithoutFingerPrint);
foreach (int nNextTimeout in Timeouts)
{
STUNMessage ResponseMessage = stream.SendRecvSTUN(this.RemoteCandidate.IPEndPoint, msgRequest, nNextTimeout);
if (ResponseMessage != null)
break;
}
}
public void PerformOutgoingSTUNCheck(RTPStream stream, string strUsername, string strPassword)
{
STUN2Message msgRequest = new STUN2Message();
msgRequest.Method = StunMethod.Binding;
msgRequest.Class = StunClass.Request;
//MappedAddressAttribute mattr = new MappedAddressAttribute();
//mattr.IPAddress = LocalCandidate.IPEndPoint.Address;
//mattr.Port = (ushort)LocalCandidate.IPEndPoint.Port;
//msgRequest.AddAttribute(mattr);
PriorityAttribute pattr = new PriorityAttribute();
pattr.Priority = (int)CalculatePriority(110, 10, this.LocalCandidate.component); ///Peer reflexive, not sure of the purpose of this yet //this.Priority;
msgRequest.AddAttribute(pattr);
if (IsControlling == true)
{
IceControllingAttribute cattr = new IceControllingAttribute();
msgRequest.AddAttribute(cattr);
}
else
{
IceControlledAttribute cattr = new IceControlledAttribute();
msgRequest.AddAttribute(cattr);
}
if (strUsername != null)
{
UserNameAttribute unameattr = new UserNameAttribute();
unameattr.UserName = strUsername;
msgRequest.AddAttribute(unameattr);
}
/// Add message integrity, computes over all the items currently added
///
int nLengthWithoutMessageIntegrity = msgRequest.Bytes.Length;
MessageIntegrityAttribute mac = new MessageIntegrityAttribute();
msgRequest.AddAttribute(mac);
mac.ComputeHMACShortTermCredentials(msgRequest, nLengthWithoutMessageIntegrity, strPassword);
/// Add fingerprint
///
int nLengthWithoutFingerPrint = msgRequest.Bytes.Length;
FingerPrintAttribute fattr = new FingerPrintAttribute();
msgRequest.AddAttribute(fattr);
fattr.ComputeCRC(msgRequest, nLengthWithoutFingerPrint);
foreach (int nNextTimeout in Timeouts)
{
STUNMessage ResponseMessage = stream.SendRecvSTUN(this.RemoteCandidate.IPEndPoint, msgRequest, nNextTimeout);
ResponseEndpoint = null;
if (ResponseMessage != null)
{
foreach (STUNAttributeContainer cont in ResponseMessage.Attributes)
{
if (cont.ParsedAttribute.Type == StunAttributeType.MappedAddress)
{
MappedAddressAttribute attrib = cont.ParsedAttribute as MappedAddressAttribute;
ResponseEndpoint = new IPEndPoint(attrib.IPAddress, attrib.Port);
}
}
System.Diagnostics.Debug.WriteLine("STUN check for remote candidate {0} succeeded", this.RemoteCandidate.IPEndPoint);
this.CandidatePairState = RTP.CandidatePairState.Succeeded;
break;
}
else
{
System.Diagnostics.Debug.WriteLine("STUN check for remote candidate {0} failed", this.RemoteCandidate.IPEndPoint);
this.CandidatePairState = RTP.CandidatePairState.Failed;
}
}
}
public void PerformOutgoingSTUNCheck(RTPStream stream, string strUsername, string strPassword)
{
STUN2Message msgRequest = new STUN2Message();
msgRequest.Method = StunMethod.Binding;
msgRequest.Class = StunClass.Request;
//MappedAddressAttribute mattr = new MappedAddressAttribute();
//mattr.IPAddress = LocalCandidate.IPEndPoint.Address;
//mattr.Port = (ushort)LocalCandidate.IPEndPoint.Port;
//msgRequest.AddAttribute(mattr);
PriorityAttribute pattr = new PriorityAttribute();
pattr.Priority = (int) CalculatePriority(110, 10, this.LocalCandidate.component); ///Peer reflexive, not sure of the purpose of this yet //this.Priority;
msgRequest.AddAttribute(pattr);
if (IsControlling == true)
{
IceControllingAttribute cattr = new IceControllingAttribute();
msgRequest.AddAttribute(cattr);
}
else
{
IceControlledAttribute cattr = new IceControlledAttribute();
msgRequest.AddAttribute(cattr);
}
if (strUsername != null)
{
UserNameAttribute unameattr = new UserNameAttribute();
unameattr.UserName = strUsername;
msgRequest.AddAttribute(unameattr);
}
/// Add message integrity, computes over all the items currently added
///
int nLengthWithoutMessageIntegrity = msgRequest.Bytes.Length;
MessageIntegrityAttribute mac = new MessageIntegrityAttribute();
msgRequest.AddAttribute(mac);
mac.ComputeHMACShortTermCredentials(msgRequest, nLengthWithoutMessageIntegrity, strPassword);
/// Add fingerprint
///
int nLengthWithoutFingerPrint = msgRequest.Bytes.Length;
FingerPrintAttribute fattr = new FingerPrintAttribute();
msgRequest.AddAttribute(fattr);
fattr.ComputeCRC(msgRequest, nLengthWithoutFingerPrint);
foreach (int nNextTimeout in Timeouts)
{
STUNMessage ResponseMessage = stream.SendRecvSTUN(this.RemoteCandidate.IPEndPoint, msgRequest, nNextTimeout);
ResponseEndpoint = null;
if (ResponseMessage != null)
{
foreach (STUNAttributeContainer cont in ResponseMessage.Attributes)
{
if (cont.ParsedAttribute.Type == StunAttributeType.MappedAddress)
{
MappedAddressAttribute attrib = cont.ParsedAttribute as MappedAddressAttribute;
ResponseEndpoint = new IPEndPoint(attrib.IPAddress, attrib.Port);
}
}
System.Diagnostics.Debug.WriteLine("STUN check for remote candidate {0} succeeded", this.RemoteCandidate.IPEndPoint);
this.CandidatePairState = RTP.CandidatePairState.Succeeded;
break;
}
else
{
System.Diagnostics.Debug.WriteLine("STUN check for remote candidate {0} failed", this.RemoteCandidate.IPEndPoint);
this.CandidatePairState = RTP.CandidatePairState.Failed;
}
}
}
