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
- FieldValue.cs
- OleDbSchemaGuid.cs
- Stylesheet.cs
- WebRequestModulesSection.cs
- DbDeleteCommandTree.cs
- SocketPermission.cs
- SafeIUnknown.cs
- ExpandCollapsePattern.cs
- ResourceSetExpression.cs
- Matrix.cs
- OleDbErrorCollection.cs
- KeyGesture.cs
- RightsManagementPermission.cs
- FormViewUpdateEventArgs.cs
- DiscoveryClientChannelBase.cs
- GlyphRun.cs
- SmtpReplyReader.cs
- AnalyzedTree.cs
- PolyBezierSegment.cs
- RequestCachingSection.cs
- DataStreams.cs
- QualifiedId.cs
- MessageRpc.cs
- PropertyNames.cs
- Debug.cs
- ProgressPage.cs
- OdbcCommand.cs
- RenderDataDrawingContext.cs
- HttpCookie.cs
- NameValueFileSectionHandler.cs
- ClientConvert.cs
- DataGridViewDataConnection.cs
- TrimSurroundingWhitespaceAttribute.cs
- BamlLocalizabilityResolver.cs
- RuntimeEnvironment.cs
- PolyQuadraticBezierSegment.cs
- SystemEvents.cs
- DataSourceConverter.cs
- LinqMaximalSubtreeNominator.cs
- FormsAuthenticationUser.cs
- SqlProviderManifest.cs
- SafeRightsManagementHandle.cs
- OdbcErrorCollection.cs
- LineBreak.cs
- ReadOnlyObservableCollection.cs
- ToolStripArrowRenderEventArgs.cs
- DrawingBrush.cs
- XmlSchemaInferenceException.cs
- StorageEndPropertyMapping.cs
- ArrayMergeHelper.cs
- TraceFilter.cs
- XmlNodeChangedEventArgs.cs
- PageBreakRecord.cs
- baseaxisquery.cs
- UnmanagedMemoryStream.cs
- WebPartVerbCollection.cs
- DataGridLength.cs
- CompositeDuplexBindingElementImporter.cs
- PipeStream.cs
- HandlerBase.cs
- ArrayWithOffset.cs
- PrintEvent.cs
- GridViewRowPresenter.cs
- Registry.cs
- AppDomainInstanceProvider.cs
- DecimalAnimationBase.cs
- WinFormsSecurity.cs
- CommentAction.cs
- RotationValidation.cs
- SplayTreeNode.cs
- ModuleElement.cs
- TextCompositionEventArgs.cs
- NavigatingCancelEventArgs.cs
- MachineKey.cs
- TimeSpanValidator.cs
- Formatter.cs
- FeatureSupport.cs
- FormCollection.cs
- EventLog.cs
- BlurBitmapEffect.cs
- AutomationPatternInfo.cs
- UnauthorizedWebPart.cs
- Expression.DebuggerProxy.cs
- Win32.cs
- SourceItem.cs
- OutputCache.cs
- Logging.cs
- Filter.cs
- SqlProfileProvider.cs
- BinaryFormatter.cs
- MimeBasePart.cs
- EncodingDataItem.cs
- EasingKeyFrames.cs
- SessionStateModule.cs
- HMAC.cs
- FileDataSourceCache.cs
- DataBinding.cs
- DivideByZeroException.cs
- Matrix3DStack.cs
- TypedRowHandler.cs