Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Net / System / Net / NetworkInformation / SystemIPGlobalProperties.cs / 1 / SystemIPGlobalProperties.cs
namespace System.Net.NetworkInformation { using System.Net; using System.Net.Sockets; using System.Security.Permissions; using System; using System.Runtime.InteropServices; using System.Collections; using System.ComponentModel; using System.Threading; internal class SystemIPGlobalProperties:IPGlobalProperties { private FixedInfo fixedInfo; private bool fixedInfoInitialized = false; //changing these require a reboot, so we'll cache them instead. private static string hostName = null; private static string domainName = null; static object syncObject = new object(); internal SystemIPGlobalProperties() { } internal static FixedInfo GetFixedInfo(){ uint size = 0; SafeLocalFree buffer = null; FixedInfo fixedInfo = new FixedInfo(); //first we need to get the size of the buffer uint result = UnsafeNetInfoNativeMethods.GetNetworkParams(SafeLocalFree.Zero,ref size); while (result == IpHelperErrors.ErrorBufferOverflow) { try { //now we allocate the buffer and read the network parameters. buffer = SafeLocalFree.LocalAlloc((int)size); result = UnsafeNetInfoNativeMethods.GetNetworkParams(buffer,ref size); if ( result == IpHelperErrors.Success ) { fixedInfo = new FixedInfo( (FIXED_INFO)Marshal.PtrToStructure(buffer.DangerousGetHandle(),typeof(FIXED_INFO))); } } finally { if(buffer != null){ buffer.Close(); } } } //if the result include there being no information, we'll still throw if (result != IpHelperErrors.Success) { throw new NetworkInformationException((int)result); } return fixedInfo; } internal FixedInfo FixedInfo { get { if (!fixedInfoInitialized) { lock(this){ if (!fixedInfoInitialized) { fixedInfo = GetFixedInfo(); fixedInfoInitialized = true; } } } return fixedInfo; } } ///Specifies the host name for the local computer. public override string HostName{ get { if(hostName == null){ lock(syncObject){ if(hostName == null){ hostName = FixedInfo.HostName; domainName = FixedInfo.DomainName; } } } return hostName; } } ///Specifies the domain in which the local computer is registered. public override string DomainName{ get { if(domainName == null){ lock(syncObject){ if(domainName == null){ hostName = FixedInfo.HostName; domainName = FixedInfo.DomainName; } } } return domainName; } } ////// The type of node. /// ////// The exact mechanism by which NetBIOS names are resolved to IP addresses /// depends on the node's configured NetBIOS Node Type. Broadcast - uses broadcast /// NetBIOS Name Queries for name registration and resolution. /// PeerToPeer - uses a NetBIOS name server (NBNS), such as Windows Internet /// Name Service (WINS), to resolve NetBIOS names. /// Mixed - uses Broadcast then PeerToPeer. /// Hybrid - uses PeerToPeer then Broadcast. /// public override NetBiosNodeType NodeType{get { return (NetBiosNodeType)FixedInfo.NodeType;} } ///Specifies the DHCP scope name. public override string DhcpScopeName{get { return FixedInfo.ScopeId;} } ///Specifies whether the local computer is acting as an WINS proxy. public override bool IsWinsProxy{get { return (FixedInfo.EnableProxy);} } public override TcpConnectionInformation[] GetActiveTcpConnections(){ ArrayList list = new ArrayList(); TcpConnectionInformation[] connections = GetAllTcpConnections(); foreach(TcpConnectionInformation connection in connections){ if(connection.State != TcpState.Listen){ list.Add(connection); } } connections = new TcpConnectionInformation[list.Count]; for (int i=0; i< list.Count;i++) { connections[i]=(TcpConnectionInformation)list[i]; } return connections; } public override IPEndPoint[] GetActiveTcpListeners (){ ArrayList list = new ArrayList(); TcpConnectionInformation[] connections = GetAllTcpConnections(); foreach(TcpConnectionInformation connection in connections){ if(connection.State == TcpState.Listen){ list.Add(connection.LocalEndPoint); } } IPEndPoint[] endPoints = new IPEndPoint[list.Count]; for (int i=0; i< list.Count;i++) { endPoints[i]=(IPEndPoint)list[i]; } return endPoints; } ////// Gets the active tcp connections. Uses the native GetTcpTable api. private TcpConnectionInformation[] GetAllTcpConnections(){ uint size = 0; SafeLocalFree buffer = null; SystemTcpConnectionInformation[] tcpConnections = null; //get the size of buffer needed uint result = UnsafeNetInfoNativeMethods.GetTcpTable(SafeLocalFree.Zero,ref size,true); while (result == IpHelperErrors.ErrorInsufficientBuffer) { try { //allocate the buffer and get the tcptable buffer = SafeLocalFree.LocalAlloc((int)size); result = UnsafeNetInfoNativeMethods.GetTcpTable(buffer,ref size,true); if ( result == IpHelperErrors.Success ) { //the table info just gives us the number of rows. IntPtr newPtr = buffer.DangerousGetHandle(); MibTcpTable tcpTableInfo = (MibTcpTable)Marshal.PtrToStructure(newPtr,typeof(MibTcpTable)); if (tcpTableInfo.numberOfEntries > 0) { tcpConnections = new SystemTcpConnectionInformation[tcpTableInfo.numberOfEntries]; //we need to skip over the tableinfo to get the inline rows newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(tcpTableInfo.numberOfEntries)); for (int i=0;iGets the active udp listeners. Uses the native GetUdpTable api. public override IPEndPoint[] GetActiveUdpListeners(){ uint size = 0; SafeLocalFree buffer = null; IPEndPoint[] udpListeners = null; //get the size of buffer needed uint result = UnsafeNetInfoNativeMethods.GetUdpTable(SafeLocalFree.Zero,ref size,true); while (result == IpHelperErrors.ErrorInsufficientBuffer) { try { //allocate the buffer and get the udptable buffer = SafeLocalFree.LocalAlloc((int)size); result = UnsafeNetInfoNativeMethods.GetUdpTable(buffer,ref size,true); if ( result == IpHelperErrors.Success) { //the table info just gives us the number of rows. IntPtr newPtr = buffer.DangerousGetHandle(); MibUdpTable udpTableInfo = (MibUdpTable)Marshal.PtrToStructure(newPtr,typeof(MibUdpTable)); if (udpTableInfo.numberOfEntries > 0) { udpListeners = new IPEndPoint[udpTableInfo.numberOfEntries]; //we need to skip over the tableinfo to get the inline rows newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(udpTableInfo.numberOfEntries)); for (int i=0;i Specifies the host name for the local computer. public override string HostName{ get { if(hostName == null){ lock(syncObject){ if(hostName == null){ hostName = FixedInfo.HostName; domainName = FixedInfo.DomainName; } } } return hostName; } } /// Specifies the domain in which the local computer is registered. public override string DomainName{ get { if(domainName == null){ lock(syncObject){ if(domainName == null){ hostName = FixedInfo.HostName; domainName = FixedInfo.DomainName; } } } return domainName; } } ////// The type of node. /// ////// The exact mechanism by which NetBIOS names are resolved to IP addresses /// depends on the node's configured NetBIOS Node Type. Broadcast - uses broadcast /// NetBIOS Name Queries for name registration and resolution. /// PeerToPeer - uses a NetBIOS name server (NBNS), such as Windows Internet /// Name Service (WINS), to resolve NetBIOS names. /// Mixed - uses Broadcast then PeerToPeer. /// Hybrid - uses PeerToPeer then Broadcast. /// public override NetBiosNodeType NodeType{get { return (NetBiosNodeType)FixedInfo.NodeType;} } ///Specifies the DHCP scope name. public override string DhcpScopeName{get { return FixedInfo.ScopeId;} } ///Specifies whether the local computer is acting as an WINS proxy. public override bool IsWinsProxy{get { return (FixedInfo.EnableProxy);} } public override TcpConnectionInformation[] GetActiveTcpConnections(){ ArrayList list = new ArrayList(); TcpConnectionInformation[] connections = GetAllTcpConnections(); foreach(TcpConnectionInformation connection in connections){ if(connection.State != TcpState.Listen){ list.Add(connection); } } connections = new TcpConnectionInformation[list.Count]; for (int i=0; i< list.Count;i++) { connections[i]=(TcpConnectionInformation)list[i]; } return connections; } public override IPEndPoint[] GetActiveTcpListeners (){ ArrayList list = new ArrayList(); TcpConnectionInformation[] connections = GetAllTcpConnections(); foreach(TcpConnectionInformation connection in connections){ if(connection.State == TcpState.Listen){ list.Add(connection.LocalEndPoint); } } IPEndPoint[] endPoints = new IPEndPoint[list.Count]; for (int i=0; i< list.Count;i++) { endPoints[i]=(IPEndPoint)list[i]; } return endPoints; } ////// Gets the active tcp connections. Uses the native GetTcpTable api. private TcpConnectionInformation[] GetAllTcpConnections(){ uint size = 0; SafeLocalFree buffer = null; SystemTcpConnectionInformation[] tcpConnections = null; //get the size of buffer needed uint result = UnsafeNetInfoNativeMethods.GetTcpTable(SafeLocalFree.Zero,ref size,true); while (result == IpHelperErrors.ErrorInsufficientBuffer) { try { //allocate the buffer and get the tcptable buffer = SafeLocalFree.LocalAlloc((int)size); result = UnsafeNetInfoNativeMethods.GetTcpTable(buffer,ref size,true); if ( result == IpHelperErrors.Success ) { //the table info just gives us the number of rows. IntPtr newPtr = buffer.DangerousGetHandle(); MibTcpTable tcpTableInfo = (MibTcpTable)Marshal.PtrToStructure(newPtr,typeof(MibTcpTable)); if (tcpTableInfo.numberOfEntries > 0) { tcpConnections = new SystemTcpConnectionInformation[tcpTableInfo.numberOfEntries]; //we need to skip over the tableinfo to get the inline rows newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(tcpTableInfo.numberOfEntries)); for (int i=0;iGets the active udp listeners. Uses the native GetUdpTable api. public override IPEndPoint[] GetActiveUdpListeners(){ uint size = 0; SafeLocalFree buffer = null; IPEndPoint[] udpListeners = null; //get the size of buffer needed uint result = UnsafeNetInfoNativeMethods.GetUdpTable(SafeLocalFree.Zero,ref size,true); while (result == IpHelperErrors.ErrorInsufficientBuffer) { try { //allocate the buffer and get the udptable buffer = SafeLocalFree.LocalAlloc((int)size); result = UnsafeNetInfoNativeMethods.GetUdpTable(buffer,ref size,true); if ( result == IpHelperErrors.Success) { //the table info just gives us the number of rows. IntPtr newPtr = buffer.DangerousGetHandle(); MibUdpTable udpTableInfo = (MibUdpTable)Marshal.PtrToStructure(newPtr,typeof(MibUdpTable)); if (udpTableInfo.numberOfEntries > 0) { udpListeners = new IPEndPoint[udpTableInfo.numberOfEntries]; //we need to skip over the tableinfo to get the inline rows newPtr = (IntPtr)((long)newPtr + Marshal.SizeOf(udpTableInfo.numberOfEntries)); for (int i=0;i
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- KeyPressEvent.cs
- SafeBitVector32.cs
- CodeMemberField.cs
- BinaryWriter.cs
- TextTreeRootNode.cs
- InputBinding.cs
- TokenBasedSet.cs
- NavigationProgressEventArgs.cs
- Certificate.cs
- DesignerOptionService.cs
- MessageDecoder.cs
- DesignerSerializerAttribute.cs
- SerializationStore.cs
- SpellerStatusTable.cs
- DataStreams.cs
- DbMetaDataColumnNames.cs
- ListenerElementsCollection.cs
- SoapProtocolImporter.cs
- SqlMethodTransformer.cs
- HttpDictionary.cs
- RotateTransform.cs
- recordstatescratchpad.cs
- BinaryExpression.cs
- MulticastNotSupportedException.cs
- GeneralTransform3DGroup.cs
- ProtocolsSection.cs
- JsonFormatGeneratorStatics.cs
- TryCatchDesigner.xaml.cs
- ExpressionBuilderCollection.cs
- Exceptions.cs
- IdentityNotMappedException.cs
- ProcessingInstructionAction.cs
- PnrpPermission.cs
- XmlObjectSerializer.cs
- AlternationConverter.cs
- ControlPropertyNameConverter.cs
- SpeechEvent.cs
- WebScriptMetadataMessageEncodingBindingElement.cs
- _NegoStream.cs
- CodePageEncoding.cs
- XNodeNavigator.cs
- RichTextBox.cs
- IDReferencePropertyAttribute.cs
- LayoutManager.cs
- Material.cs
- LeftCellWrapper.cs
- HtmlInputControl.cs
- XmlSchemaRedefine.cs
- NativeMethods.cs
- DWriteFactory.cs
- BuilderPropertyEntry.cs
- GeometryModel3D.cs
- DbMetaDataCollectionNames.cs
- TransportSecurityHelpers.cs
- SqlCacheDependencyDatabaseCollection.cs
- ColorIndependentAnimationStorage.cs
- Constraint.cs
- XmlDeclaration.cs
- BindStream.cs
- GridSplitter.cs
- COM2ExtendedTypeConverter.cs
- Rotation3DKeyFrameCollection.cs
- PropertySegmentSerializationProvider.cs
- StrongNameMembershipCondition.cs
- XmlSubtreeReader.cs
- SoapObjectReader.cs
- CodeMethodReturnStatement.cs
- DeferredSelectedIndexReference.cs
- CopyAttributesAction.cs
- TextEditorTables.cs
- ConstraintCollection.cs
- PropertyDescriptor.cs
- BehaviorEditorPart.cs
- TypeNameHelper.cs
- ToggleProviderWrapper.cs
- documentsequencetextpointer.cs
- SortExpressionBuilder.cs
- XmlUtf8RawTextWriter.cs
- ConfigurationElementCollection.cs
- ToolStrip.cs
- FreezableOperations.cs
- DataKeyArray.cs
- XmlQueryCardinality.cs
- DataGridViewRow.cs
- regiisutil.cs
- Exceptions.cs
- HtmlInputFile.cs
- SqlAggregateChecker.cs
- TextDpi.cs
- TransportSecurityHelpers.cs
- PropertyInfoSet.cs
- UserControlAutomationPeer.cs
- InitializerFacet.cs
- ImageField.cs
- RequestCachingSection.cs
- DesignerTextWriter.cs
- SynchronizationLockException.cs
- FormViewUpdateEventArgs.cs
- ExpressionValueEditor.cs
- QilUnary.cs