Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Tools / WSATConfig / Configuration / MsdtcClusterUtils.cs / 1305376 / MsdtcClusterUtils.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace Microsoft.Tools.ServiceModel.WsatConfig { using System; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security.Permissions; using System.Collections.Generic; using System.Text; using Microsoft.Win32; static class MsdtcClusterUtils { static string clusterName = null; const string MsdtcResourceTypeName = "Distributed Transaction Coordinator"; [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)] internal static bool IsClusterServer(string machineName) { #pragma warning suppress 56523 SafeHCluster hCluster = SafeNativeMethods.OpenCluster(Utilities.IsLocalMachineName(machineName) ? null : machineName); bool result = false; using (hCluster) { result = !hCluster.IsInvalid; } return result; } #if WSAT_UI [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)] internal static bool ResolveVirtualServerName(string machineName, string dtcResourceName, out string virtualServer) { virtualServer = string.Empty; #pragma warning suppress 56523 SafeHCluster hCluster = SafeNativeMethods.OpenCluster(Utilities.IsLocalMachineName(machineName) ? null : machineName); if (hCluster.IsInvalid) { return false; } using (hCluster) { #pragma warning suppress 56523 SafeHClusEnum hEnum = SafeNativeMethods.ClusterOpenEnum(hCluster, ClusterEnum.Resource); if (hEnum.IsInvalid) { return false; } using (hEnum) { uint index = 0; bool moreToEnumerate; SafeHResource hResource; do { string theResourceName = string.Empty; moreToEnumerate = GetResourceFromEnumeration(hCluster, hEnum, index, out hResource, out theResourceName); if (moreToEnumerate) { if (IsTransactionManager(hResource)) { if (string.CompareOrdinal(theResourceName, dtcResourceName) == 0) { virtualServer = GetResourceNetworkName(hResource); return true; } } hResource.Dispose(); index++; } } while (moreToEnumerate); } } return false; } #endif [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)] internal static SafeHResource GetTransactionManagerClusterResource(string virtualServerName, out string[] nodes) { nodes = null; #pragma warning suppress 56523 SafeHCluster hCluster = SafeNativeMethods.OpenCluster(null); if (hCluster.IsInvalid) { return null; } using (hCluster) { //W2k3 cluster if (Utilities.OSMajor <= 5) { if (Utilities.IsLocalMachineName(virtualServerName)) { virtualServerName = GetClusterName(hCluster); } } #pragma warning suppress 56523 SafeHClusEnum hEnum = SafeNativeMethods.ClusterOpenEnum(hCluster, ClusterEnum.Resource); if (hEnum.IsInvalid) { return null; } using (hEnum) { uint index = 0; bool moreToEnumerate; SafeHResource hResource; do { string theResourceName = string.Empty; moreToEnumerate = GetResourceFromEnumeration(hCluster, hEnum, index, out hResource, out theResourceName); if (moreToEnumerate) { if (IsTransactionManager(hResource)) { string networkName = GetResourceNetworkName(hResource); Utilities.Log("Resource network name: " + networkName); if (Utilities.SafeCompare(networkName, virtualServerName)) { nodes = GetClusterNodes(hCluster); return hResource; } } hResource.Dispose(); index++; } } while (moreToEnumerate) ; } } return null; } static string GetClusterName(SafeHCluster hCluster) { if (clusterName == null) { uint cch = 255u; StringBuilder sb = new StringBuilder((int)cch); int ret = SafeNativeMethods.GetClusterInformation( hCluster, sb, ref cch, IntPtr.Zero); if (ret != SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA) { if (ret == SafeNativeMethods.ERROR_MORE_DATA) { sb = new StringBuilder((int)cch); ret = SafeNativeMethods.GetClusterInformation( hCluster, sb, ref cch, IntPtr.Zero); if (ret != SafeNativeMethods.ERROR_SUCCESS) { return null; } } } clusterName = sb.ToString(); } return clusterName; } static bool IsTransactionManager(SafeHResource hResource) { Utilities.Log("Entered IsTransactionManager - "); string resourceType = GetResourceType(hResource); Utilities.Log("Resource type name: " + resourceType); return string.CompareOrdinal(resourceType, MsdtcResourceTypeName) == 0; } static string GetResourceType(SafeHResource hResource) { return IssueClusterResourceControlString(hResource, ClusterResourceControlCode.GetResourceType); } static string GetResourceNetworkName(SafeHResource hResource) { // On Vista and above, this API can be called with null and 0 to discover the true length // of the return buffer. However, on Win2003 that causes the API to fail with // ERROR_DEPENDENCY_NOT_FOUND. To play it safe, we simply pre-allocate a buffer up front // that should be enough to catch the two possible cases: // - 15-character NetBios names // - 63-character DNS labels uint cch = 64; StringBuilder sb = new StringBuilder((int)cch); #pragma warning suppress 56523 if (SafeNativeMethods.GetClusterResourceNetworkName(hResource, sb, ref cch)) { return sb.ToString(); } return null; } // return true if more items to enumerate, otherwise false [SecurityPermission(SecurityAction.LinkDemand, UnmanagedCode = true)] static bool GetResourceFromEnumeration(SafeHCluster hCluster, SafeHClusEnum hEnum, uint index, out SafeHResource hResource, out string theResourceName) { uint type, cch = 0; hResource = null; theResourceName = string.Empty; uint ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, null, ref cch); if (ret == SafeNativeMethods.ERROR_NO_MORE_ITEMS) { return false; } else if (ret == SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA) { StringBuilder sb = new StringBuilder((int)++cch); ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, sb, ref cch); if (ret == SafeNativeMethods.ERROR_SUCCESS) { string resourceName = sb.ToString(); #pragma warning suppress 56523 hResource = SafeNativeMethods.OpenClusterResource(hCluster, resourceName); if (hResource.IsInvalid) { hResource = null; } else { theResourceName = resourceName; } } } return true; } static string[] GetClusterNodes(SafeHCluster hCluster) { #pragma warning suppress 56523 SafeHClusEnum hEnum = SafeNativeMethods.ClusterOpenEnum(hCluster, ClusterEnum.Node); if (hEnum.IsInvalid) { return null; } ListnodeList = new List (2); // 2 nodes are a typical cluster configuration using (hEnum) { uint ret, index = 0; do { uint type, cch = 0; ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, null, ref cch); if (ret == SafeNativeMethods.ERROR_NO_MORE_ITEMS) { break; } else if (ret == SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA) { StringBuilder sb = new StringBuilder((int)++cch); ret = SafeNativeMethods.ClusterEnum(hEnum, index, out type, sb, ref cch); if (ret == SafeNativeMethods.ERROR_SUCCESS) { Utilities.Log("Found a node: [" + sb.ToString() + "]"); nodeList.Add(sb.ToString()); } } index++; } while (ret == SafeNativeMethods.ERROR_SUCCESS); } return nodeList.ToArray(); } static byte[] IssueClusterResourceControl(SafeHResource hResource, ClusterResourceControlCode code) { uint cb = 0; uint ret = SafeNativeMethods.ClusterResourceControl(hResource, IntPtr.Zero, code, IntPtr.Zero, 0, null, 0, ref cb); if (ret == SafeNativeMethods.ERROR_SUCCESS || ret == SafeNativeMethods.ERROR_MORE_DATA) { byte[] buffer = new byte[cb]; ret = SafeNativeMethods.ClusterResourceControl(hResource, IntPtr.Zero, code, IntPtr.Zero, 0, buffer, cb, ref cb); if (ret == SafeNativeMethods.ERROR_SUCCESS) { return buffer; } } return null; } static string IssueClusterResourceControlString(SafeHResource hResource, ClusterResourceControlCode code) { byte[] buffer = IssueClusterResourceControl(hResource, code); if (buffer == null) { return null; } try { return Encoding.Unicode.GetString(buffer, 0, buffer.Length - 2); } catch (ArgumentException) { return null; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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