Binding.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / TransactionBridge / Microsoft / Transactions / Wsat / Messaging / Binding.cs / 1 / Binding.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------

// Define the bindings used for WS-Coor / WS-AT / .NET-AT port types 

using System; 
using System.Collections.Generic; 
using System.Net;
using System.Net.Security; 
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Security;
using System.Text; 
using Microsoft.Transactions.Wsat.Protocol;
 
 
using Microsoft.Transactions.Bridge;
 
namespace Microsoft.Transactions.Wsat.Messaging
{
    abstract class CoordinationBinding : Binding
    { 

        ProtocolVersion protocolVersion; 
 
        // Calling CreateFault on an incoming message can expose some DoS-related security
        // vulnerabilities when a service is in streaming mode.  See MB 47592 for more details. 
        // The WS-AT protocol service does not use streaming mode on any of its bindings, so the
        // message we have in hand has already passed the binding�s MaxReceivedMessageSize check.
        // int.MaxValue may be a safe value, but it will require a formal review.
        internal const int MaxFaultSize = (int)TransportDefaults.MaxReceivedMessageSize; 

        protected CoordinationBinding(string name, string ns, ProtocolVersion protocolVersion) : base(name, ns) 
        { 
            this.protocolVersion = protocolVersion;
        } 

        public override string Scheme
        {
            get { return Uri.UriSchemeHttps; } 
        }
 
        protected void AddTransactionFlowBindingElement(BindingElementCollection bindingElements) 
        {
            // The TransactionFlowBindingElement is only used for IssuedTokens and IssuedTokens 
            // require a TransactionProtocol in order to function correctly...
            TransactionProtocol protocol = (protocolVersion == ProtocolVersion.Version10) ?
                TransactionProtocol.WSAtomicTransactionOctober2004 :
                TransactionProtocol.WSAtomicTransaction11; 
            TransactionFlowBindingElement txFlowBE = new TransactionFlowBindingElement(protocol);
            txFlowBE.Transactions = false; 
            txFlowBE.IssuedTokens = TransactionFlowOption.Allowed; 
            bindingElements.Add(txFlowBE);
        } 

        protected void AddTransportSecurityBindingElement(BindingElementCollection bindingElements)
        {
            TransportSecurityBindingElement transportSecurity = new TransportSecurityBindingElement(); 
            transportSecurity.MessageSecurityVersion = MessagingVersionHelper.SecurityVersion(this.protocolVersion);
            bindingElements.Add(transportSecurity); 
        } 

        protected void AddTextEncodingBindingElement(BindingElementCollection bindingElements) 
        {
            TextMessageEncodingBindingElement encoding = new TextMessageEncodingBindingElement();
            encoding.WriteEncoding = Encoding.UTF8;
            encoding.MessageVersion = MessagingVersionHelper.MessageVersion(this.protocolVersion); 
            bindingElements.Add(encoding);
        } 
 
        protected void AddCompositeDuplexBindingElement(BindingElementCollection bindingElements,
                                                        Uri clientBaseAddress) 
        {
            bindingElements.Add(new DuplexCorrelationBindingElement());
            InternalDuplexBindingElement internalBE = new InternalDuplexBindingElement(true);
            bindingElements.Add(internalBE); 
            CompositeDuplexBindingElement duplexBE = new CompositeDuplexBindingElement();
            duplexBE.ClientBaseAddress = clientBaseAddress; 
            bindingElements.Add(duplexBE); 
        }
 
        protected void AddOneWayBindingElement(BindingElementCollection bindingElements)
        {
            bindingElements.Add(new OneWayBindingElement());
        } 

        protected void AddInteropHttpsTransportBindingElement(BindingElementCollection bindingElements) 
        { 
            HttpsTransportBindingElement httpsBE = new HttpsTransportBindingElement();
            httpsBE.RequireClientCertificate = true; 
            httpsBE.UseDefaultWebProxy = false;
            bindingElements.Add(httpsBE);
        }
 
        protected void AddNamedPipeBindingElement(BindingElementCollection bindingElements)
        { 
            NamedPipeTransportBindingElement pipeTransportBE = new NamedPipeTransportBindingElement(); 
            // See MB 32913 for details on how these numbers were chosen
            pipeTransportBE.MaxPendingConnections = 50; 
            pipeTransportBE.ConnectionPoolSettings.MaxOutboundConnectionsPerEndpoint = 25;
            pipeTransportBE.MaxPendingAccepts = 25;
            bindingElements.Add(pipeTransportBE);
        } 

        protected void AddWindowsStreamSecurityBindingElement(BindingElementCollection bindingElements) 
        { 
            WindowsStreamSecurityBindingElement windowsSecurityBE = new WindowsStreamSecurityBindingElement();
            windowsSecurityBE.ProtectionLevel = ProtectionLevel.EncryptAndSign; 

            bindingElements.Add(windowsSecurityBE);
        }
 
        public override BindingElementCollection CreateBindingElements()
        { 
            BindingElementCollection bindingElements = new BindingElementCollection(); 
            AddBindingElements(bindingElements);
            return bindingElements; 
        }

        protected abstract void AddBindingElements(BindingElementCollection bindingElements);
 
        //
        class DuplexCorrelationBindingElement : BindingElement 
        { 
            public override BindingElement Clone()
            { 
                return this;
            }

            public override T GetProperty(BindingContext context) 
            {
                if (typeof(T) == typeof(ISecurityCapabilities)) 
                { 
                    ISecurityCapabilities lowerCapabilities = context.GetInnerProperty();
                    if (lowerCapabilities != null) 
                    {
                        // this binding can do server auth even over composite duplex
                        return (T)(object)(new SecurityCapabilities(lowerCapabilities.SupportsClientAuthentication,
                            true, lowerCapabilities.SupportsClientWindowsIdentity, lowerCapabilities.SupportedRequestProtectionLevel, 
                            lowerCapabilities.SupportedRequestProtectionLevel));
                    } 
                    else 
                    {
                        return null; 
                    }
                }
                else
                { 
                    return context.GetInnerProperty();
                } 
            } 
        }
    } 

    class InteropRequestReplyBinding : CoordinationBinding
    {
        Uri clientBaseAddress; 

        public InteropRequestReplyBinding(Uri clientBaseAddress, ProtocolVersion protocolVersion) 
            : 
            base(BindingStrings.InteropBindingName, AtomicTransactionStrings.Version(protocolVersion).Namespace, protocolVersion)
        { 
            this.clientBaseAddress = clientBaseAddress;
        }

        protected override void AddBindingElements(BindingElementCollection bindingElements) 
        {
            AddCompositeDuplexBindingElement(bindingElements, this.clientBaseAddress); 
            AddOneWayBindingElement(bindingElements); 
            AddTextEncodingBindingElement(bindingElements);
            AddInteropHttpsTransportBindingElement(bindingElements); 
        }
    }

    class InteropRegistrationBinding : InteropRequestReplyBinding 
    {
        SupportingTokenBindingElement supportingTokenBE; 
 
        public InteropRegistrationBinding(Uri clientBaseAddress, bool acceptSupportingTokens, ProtocolVersion protocolVersion)
            : base(clientBaseAddress, protocolVersion) 
        {
            if (acceptSupportingTokens)
            {
                this.supportingTokenBE = new SupportingTokenBindingElement(protocolVersion); 
            }
        } 
 
        public SupportingTokenBindingElement SupportingTokenBindingElement
        { 
            get { return this.supportingTokenBE; }
        }

        protected override void AddBindingElements(BindingElementCollection bindingElements) 
        {
            if (this.supportingTokenBE != null) 
            { 
                AddTransportSecurityBindingElement(bindingElements);
                bindingElements.Add(this.supportingTokenBE); 
            }
            base.AddBindingElements(bindingElements);
        }
    } 

    class InteropActivationBinding: InteropRequestReplyBinding 
    { 
        public InteropActivationBinding(Uri clientBaseAddress, ProtocolVersion protocolVersion)
            : base(clientBaseAddress, protocolVersion) 
        {
        }

        protected override void AddBindingElements(BindingElementCollection bindingElements) 
        {
            AddTransactionFlowBindingElement(bindingElements); 
            base.AddBindingElements(bindingElements); 
        }
    } 

    class InteropDatagramBinding : CoordinationBinding
    {
        public InteropDatagramBinding(ProtocolVersion protocolVersion) 
            :
            base(BindingStrings.InteropBindingName, AtomicTransactionStrings.Version(protocolVersion).Namespace, protocolVersion) { } 
 
        protected override void AddBindingElements(BindingElementCollection bindingElements)
        { 
            AddTextEncodingBindingElement(bindingElements);
            AddInteropHttpsTransportBindingElement(bindingElements);
        }
    } 

    class NamedPipeBinding : CoordinationBinding 
    { 
        public NamedPipeBinding(ProtocolVersion protocolVersion)
            : 
            base(BindingStrings.NamedPipeBindingName, DotNetAtomicTransactionExternalStrings.Namespace, protocolVersion) { }

        public override string Scheme
        { 
            get { return Uri.UriSchemeNetPipe; }
        } 
 
        protected override void AddBindingElements(BindingElementCollection bindingElements)
        { 
            bindingElements.Add(new BinaryMessageEncodingBindingElement());
            AddTransactionFlowBindingElement(bindingElements);
            AddWindowsStreamSecurityBindingElement(bindingElements);
            AddNamedPipeBindingElement(bindingElements); 
        }
    } 
 
    class WindowsRequestReplyBinding : CoordinationBinding
    { 
        public WindowsRequestReplyBinding(ProtocolVersion protocolVersion)
            :
            base(BindingStrings.WindowsBindingName, DotNetAtomicTransactionExternalStrings.Namespace, protocolVersion) { }
 
        void AddWindowsHttpsTransportBindingElement(BindingElementCollection bindingElements)
        { 
            HttpsTransportBindingElement httpsBE = new HttpsTransportBindingElement(); 
            httpsBE.RequireClientCertificate = false;
            httpsBE.UseDefaultWebProxy = false; 
            httpsBE.AuthenticationScheme = AuthenticationSchemes.Negotiate;
            bindingElements.Add(httpsBE);
        }
 
        protected override void AddBindingElements(BindingElementCollection bindingElements)
        { 
            AddTransactionFlowBindingElement(bindingElements); 
            AddTextEncodingBindingElement(bindingElements);
            AddWindowsHttpsTransportBindingElement(bindingElements); 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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