Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / NetworkInformation / NetworkInformationPermission.cs / 1 / NetworkInformationPermission.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net.NetworkInformation { using System.Collections; using System.Security; using System.Security.Permissions; using System.Globalization; using System.Threading; [Flags] public enum NetworkInformationAccess {None = 0, Read=1, Ping = 4}; [ AttributeUsage( AttributeTargets.Method | AttributeTargets.Constructor | AttributeTargets.Class | AttributeTargets.Struct | AttributeTargets.Assembly, AllowMultiple = true, Inherited = false )] [Serializable] public sealed class NetworkInformationPermissionAttribute: CodeAccessSecurityAttribute { private const string strAccess = "Access"; private string access = null; public NetworkInformationPermissionAttribute( SecurityAction action ): base( action ) { } public string Access{ get{ return access; } set{ access = value; } } public override IPermission CreatePermission() { NetworkInformationPermission perm = null; if (Unrestricted) { perm = new NetworkInformationPermission(PermissionState.Unrestricted); } else { perm = new NetworkInformationPermission(PermissionState.None); if (access != null) { if (0 == string.Compare(access, "Read", StringComparison.OrdinalIgnoreCase)) { perm.AddPermission(NetworkInformationAccess.Read); } else if (0 == string.Compare(access, "Ping", StringComparison.OrdinalIgnoreCase)) { perm.AddPermission(NetworkInformationAccess.Ping); } else if (0 == string.Compare(access, "None", StringComparison.OrdinalIgnoreCase)) { perm.AddPermission(NetworkInformationAccess.None); } else { throw new ArgumentException(SR.GetString(SR.net_perm_invalid_val, strAccess, access)); } } } return perm; } } [Serializable] public sealed class NetworkInformationPermission : CodeAccessPermission, IUnrestrictedPermission { NetworkInformationAccess access; bool unrestricted; public NetworkInformationPermission(PermissionState state) { if (state == PermissionState.Unrestricted){ access = NetworkInformationAccess.Read | NetworkInformationAccess.Ping; unrestricted = true; } else{ access = NetworkInformationAccess.None; } } internal NetworkInformationPermission(bool unrestricted) { if (unrestricted){ access = NetworkInformationAccess.Read | NetworkInformationAccess.Ping; unrestricted = true; } else{ access = NetworkInformationAccess.None; } } public NetworkInformationPermission(NetworkInformationAccess access) { this.access = access; } public NetworkInformationAccess Access{ get{ return access; } } public void AddPermission(NetworkInformationAccess access) { this.access|=access; } public bool IsUnrestricted() { return unrestricted; } public override IPermission Copy() { if(unrestricted){ return new NetworkInformationPermission(true); } return new NetworkInformationPermission(access); } public override IPermission Union(IPermission target) { if (target==null) { return this.Copy(); } NetworkInformationPermission other = target as NetworkInformationPermission; if(other == null) { throw new ArgumentException(SR.GetString(SR.net_perm_target), "target"); } if(unrestricted || other.IsUnrestricted()){ return new NetworkInformationPermission(true); } return new NetworkInformationPermission(this.access | other.access); } public override IPermission Intersect(IPermission target) { if (target == null) { return null; } NetworkInformationPermission other = target as NetworkInformationPermission; if(other == null) { throw new ArgumentException(SR.GetString(SR.net_perm_target), "target"); } if(unrestricted && other.IsUnrestricted()){ return new NetworkInformationPermission(true); } return new NetworkInformationPermission(access & other.access); } public override bool IsSubsetOf(IPermission target) { // Pattern suggested by security engine if (target == null) { return (access == NetworkInformationAccess.None); } NetworkInformationPermission other = target as NetworkInformationPermission; if (other == null) { throw new ArgumentException(SR.GetString(SR.net_perm_target), "target"); } if(unrestricted && !other.IsUnrestricted()){ return false; } else if ((access & other.access) == access) { return true; } return false; } public override void FromXml(SecurityElement securityElement) { access = NetworkInformationAccess.None; if (securityElement == null) { throw new ArgumentNullException("securityElement"); } if (!securityElement.Tag.Equals("IPermission")) { throw new ArgumentException(SR.GetString(SR.net_not_ipermission), "securityElement"); } string className = securityElement.Attribute("class"); if (className == null) { throw new ArgumentException(SR.GetString(SR.net_no_classname), "securityElement"); } if (className.IndexOf(this.GetType().FullName) < 0) { throw new ArgumentException(SR.GetString(SR.net_no_typename), "securityElement"); } String str = securityElement.Attribute("Unrestricted"); if (str != null) { if (0 == string.Compare( str, "true", StringComparison.OrdinalIgnoreCase)){ access = NetworkInformationAccess.Read | NetworkInformationAccess.Ping; unrestricted = true; return; } } if(securityElement.Children != null) { foreach(SecurityElement child in securityElement.Children) { str = child.Attribute("Access"); if(0 == string.Compare(str, "Read", StringComparison.OrdinalIgnoreCase)){ access |= NetworkInformationAccess.Read; } else if(0 == string.Compare(str, "Ping", StringComparison.OrdinalIgnoreCase)){ access |= NetworkInformationAccess.Ping; } } } } public override SecurityElement ToXml() { SecurityElement securityElement = new SecurityElement( "IPermission" ); securityElement.AddAttribute("class", this.GetType().FullName + ", " + this.GetType().Module.Assembly.FullName.Replace( '\"', '\'' )); securityElement.AddAttribute("version", "1"); if(unrestricted){ securityElement.AddAttribute("Unrestricted", "true"); return securityElement; } if ((access & NetworkInformationAccess.Read) > 0) { SecurityElement child = new SecurityElement("NetworkInformationAccess"); child.AddAttribute( "Access", "Read"); securityElement.AddChild(child); } if ((access & NetworkInformationAccess.Ping) > 0) { SecurityElement child = new SecurityElement("NetworkInformationAccess"); child.AddAttribute( "Access", "Ping"); securityElement.AddChild(child); } return securityElement; } }// class NetworkInformationPermission } // namespace System.Net
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- WorkflowOperationContext.cs
- ToolboxItemAttribute.cs
- NumberSubstitution.cs
- SecurityTokenSerializer.cs
- PeekCompletedEventArgs.cs
- DSASignatureFormatter.cs
- WsdlImporter.cs
- BitmapCacheBrush.cs
- TargetParameterCountException.cs
- StartUpEventArgs.cs
- DebugTrace.cs
- SqlBinder.cs
- DbTransaction.cs
- ServiceHandle.cs
- TextContainerChangedEventArgs.cs
- ToolStrip.cs
- ByteFacetDescriptionElement.cs
- TextElementEnumerator.cs
- PrintControllerWithStatusDialog.cs
- MethodExpr.cs
- HtmlTable.cs
- DataGridViewRow.cs
- CodeDefaultValueExpression.cs
- VBCodeProvider.cs
- OutputScope.cs
- XmlElementAttributes.cs
- loginstatus.cs
- DataViewSettingCollection.cs
- sitestring.cs
- XXXInfos.cs
- XmlSchemaImporter.cs
- WebPartsSection.cs
- PrintDialog.cs
- HttpRequest.cs
- TypeCacheManager.cs
- ManipulationBoundaryFeedbackEventArgs.cs
- PropertyGridView.cs
- Point3DCollection.cs
- MenuItemStyleCollectionEditor.cs
- PageAdapter.cs
- ProxyWebPart.cs
- KeyPressEvent.cs
- LineInfo.cs
- ScrollableControl.cs
- CodeTypeConstructor.cs
- ParagraphVisual.cs
- FunctionImportElement.cs
- RegexReplacement.cs
- PathFigureCollectionConverter.cs
- XmlSchemaAll.cs
- DbConnectionOptions.cs
- MexHttpBindingElement.cs
- DocumentOrderComparer.cs
- LongValidatorAttribute.cs
- StringFormat.cs
- DataSourceXmlTextReader.cs
- DataGridViewCellPaintingEventArgs.cs
- oledbmetadatacolumnnames.cs
- ReaderWriterLockSlim.cs
- XmlAttributeAttribute.cs
- XmlSchemaAppInfo.cs
- HttpResponse.cs
- CommandTreeTypeHelper.cs
- ConsumerConnectionPointCollection.cs
- ExpressionTextBox.xaml.cs
- OperatingSystemVersionCheck.cs
- precedingquery.cs
- EventLogPermissionEntry.cs
- TextMessageEncoder.cs
- JavaScriptObjectDeserializer.cs
- UriTemplateClientFormatter.cs
- Send.cs
- ObjectComplexPropertyMapping.cs
- LinqDataSourceHelper.cs
- PersonalizationAdministration.cs
- LinqDataSourceContextEventArgs.cs
- ObjectDataSourceFilteringEventArgs.cs
- FocusManager.cs
- CryptoApi.cs
- CommandManager.cs
- TouchPoint.cs
- ServiceContractAttribute.cs
- WebPartConnection.cs
- ProcessModule.cs
- WindowsFormsSynchronizationContext.cs
- BypassElement.cs
- InheritanceAttribute.cs
- RoutedEventArgs.cs
- StatusBar.cs
- XmlSchemaElement.cs
- ISessionStateStore.cs
- UpdateExpressionVisitor.cs
- SqlUDTStorage.cs
- ReadContentAsBinaryHelper.cs
- CompoundFileDeflateTransform.cs
- ListViewInsertionMark.cs
- TableSectionStyle.cs
- ZipPackage.cs
- AutomationElementCollection.cs
- StrokeCollection2.cs