public void ResolveAsync(PeerName peerName, Cloud cloud, int maxRecords, object userState)
{
//-------------------------------------------------
//Check arguments
//-------------------------------------------------
if (peerName == null)
{
throw new ArgumentNullException(SR.GetString(SR.Pnrp_PeerNameCantBeNull), "peerName");
}
if (cloud == null)
{
cloud = Cloud.Available;
}
if (maxRecords <= 0)
{
throw new ArgumentOutOfRangeException("maxRecords", SR.GetString(SR.Pnrp_MaxRecordsParameterMustBeGreaterThanZero));
}
if (m_ResolveCompleted == null)
{
throw new PeerToPeerException(SR.GetString(SR.Pnrp_AtleastOneEvenHandlerNeeded));
}
//---------------------------------------------------
//Demand CAS permissions
//---------------------------------------------------
PnrpPermission.UnrestrictedPnrpPermission.Demand();
//---------------------------------------------------------------
//No perf hit here, real native call happens only one time if it
//did not already happen
//---------------------------------------------------------------
UnsafeP2PNativeMethods.PnrpStartup();
//----------------------------------------------------
//userToken can't be null
//----------------------------------------------------
if (userState == null)
{
throw new ArgumentNullException(SR.GetString(SR.NullUserToken), "userState");
}
PeerNameResolverHelper peerNameResolverHelper = null;
//---------------------------------------------------
//The userToken can't be duplicate of what is in the
//current list. These are the requriments for the new Async model
//that supports multiple outstanding async calls
//---------------------------------------------------
int newTraceEventId = NewTraceEventId;
lock (m_PeerNameResolverHelperListLock)
{
if (m_PeerNameResolverHelperList.ContainsKey(userState))
{
throw new ArgumentException(SR.GetString(SR.DuplicateUserToken));
}
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, newTraceEventId,
"PeerNameResolverHelper is being created with TraceEventId {0}", newTraceEventId);
peerNameResolverHelper = new PeerNameResolverHelper(peerName, cloud, maxRecords, userState, this, newTraceEventId);
m_PeerNameResolverHelperList[userState] = peerNameResolverHelper;
}
try
{
//---------------------------------------------------
//Start resolution on that resolver
//---------------------------------------------------
peerNameResolverHelper.StartAsyncResolve();
}
catch
{
//---------------------------------------------------
//If an exception happens clear the userState from the
//list so that that token can be reused
//---------------------------------------------------
lock (m_PeerNameResolverHelperListLock)
{
m_PeerNameResolverHelperList.Remove(userState);
Logging.P2PTraceSource.TraceEvent(TraceEventType.Error, newTraceEventId,
"Removing userState token from pending list {0}", userState.GetHashCode());
}
throw;
}
}
public PeerNameRecordCollection Resolve(PeerName peerName, Cloud cloud, int maxRecords)
{
//---------------------------------------------------
//Check arguments
//---------------------------------------------------
if (peerName == null)
{
throw new ArgumentNullException(SR.GetString(SR.Pnrp_PeerNameCantBeNull), "peerName");
}
if (maxRecords <= 0)
{
throw new ArgumentOutOfRangeException("maxRecords", SR.GetString(SR.Pnrp_MaxRecordsParameterMustBeGreaterThanZero));
}
//---------------------------------------------------
//Assume all clouds if the clould passed is null?
//---------------------------------------------------
if (cloud == null)
{
cloud = Cloud.Available;
}
//---------------------------------------------------
//Demand CAS permissions
//---------------------------------------------------
PnrpPermission.UnrestrictedPnrpPermission.Demand();
//---------------------------------------------------------------
//No perf hit here, real native call happens only one time if it
//did not already happen
//---------------------------------------------------------------
UnsafeP2PNativeMethods.PnrpStartup();
//---------------------------------------------------------------
//Trace log
//---------------------------------------------------------------
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "[....] Resolve called with PeerName: {0}, Cloud: {1}, MaxRecords {2}", peerName, cloud, maxRecords);
SafePeerData shEndPointInfoArray;
string NativeCloudName = cloud.InternalName;
UInt32 ActualCountOfEndPoints = (UInt32)maxRecords;
int result = UnsafeP2PNativeMethods.PeerPnrpResolve(peerName.ToString(),
NativeCloudName,
ref ActualCountOfEndPoints,
out shEndPointInfoArray);
if (result != 0)
{
throw PeerToPeerException.CreateFromHr(SR.GetString(SR.Pnrp_CouldNotStartNameResolution), result);
}
//---------------------------------------------------
//If there are no endpoints returned, return
//an empty PeerNameRecord Collection
//---------------------------------------------------
PeerNameRecordCollection PeerNameRecords = new PeerNameRecordCollection();
if (ActualCountOfEndPoints != 0)
{
try
{
unsafe
{
IntPtr pEndPointInfoArray = shEndPointInfoArray.DangerousGetHandle();
PEER_PNRP_ENDPOINT_INFO *pEndPoints = (PEER_PNRP_ENDPOINT_INFO *)pEndPointInfoArray;
for (int i = 0; i < ActualCountOfEndPoints; i++)
{
PeerNameRecord record = new PeerNameRecord();
PEER_PNRP_ENDPOINT_INFO *pEndPointInfo = &pEndPoints[i];
record.PeerName = new PeerName(Marshal.PtrToStringUni(pEndPointInfo->pwszPeerName));
string comment = Marshal.PtrToStringUni(pEndPointInfo->pwszComment);
if (comment != null && comment.Length > 0)
{
record.Comment = comment;
}
if (pEndPointInfo->payLoad.cbPayload != 0)
{
record.Data = new byte[pEndPointInfo->payLoad.cbPayload];
Marshal.Copy(pEndPointInfo->payLoad.pbPayload, record.Data, 0, (int)pEndPointInfo->payLoad.cbPayload);
}
//record.EndPointList = new IPEndPoint[pEndPointInfo->cAddresses];
IntPtr ppSOCKADDRs = pEndPointInfo->ArrayOfSOCKADDRIN6Pointers;
for (UInt32 j = 0; j < pEndPointInfo->cAddresses; j++)
{
IntPtr pSOCKADDR = Marshal.ReadIntPtr(ppSOCKADDRs);
byte[] AddressFamilyBuffer = new byte[2];
Marshal.Copy(pSOCKADDR, AddressFamilyBuffer, 0, 2);
int addressFamily = 0;
#if BIGENDIAN
addressFamily = AddressFamilyBuffer[1] + ((int)AddressFamilyBuffer[0] << 8);
#else
addressFamily = AddressFamilyBuffer[0] + ((int)AddressFamilyBuffer[1] << 8);
#endif
byte[] buffer = new byte[((AddressFamily)addressFamily == AddressFamily.InterNetwork) ? SystemNetHelpers.IPv4AddressSize : SystemNetHelpers.IPv6AddressSize];
Marshal.Copy(pSOCKADDR, buffer, 0, buffer.Length);
IPEndPoint ipe = SystemNetHelpers.IPEndPointFromSOCKADDRBuffer(buffer);
record.EndPointCollection.Add(ipe);
ppSOCKADDRs = (IntPtr)((long)ppSOCKADDRs + Marshal.SizeOf(typeof(IntPtr)));
}
//----------------------------------
//Dump for trace
//----------------------------------
record.TracePeerNameRecord();
//----------------------------------
//Add to collection
//----------------------------------
PeerNameRecords.Add(record);
}
}
}
finally
{
shEndPointInfoArray.Dispose();
}
}
Logging.P2PTraceSource.TraceEvent(TraceEventType.Information, 0, "[....] Resolve returnig with PeerNameRecord count :{0}", PeerNameRecords.Count);
return(PeerNameRecords);
}
public void ResolveAsync(PeerName peerName, Cloud cloud, object userState)
{
ResolveAsync(peerName, cloud, Int32.MaxValue, userState);
}
public PeerNameRecordCollection Resolve(PeerName peerName, Cloud cloud)
{
return(Resolve(peerName, cloud, int.MaxValue));
}
