获取给定LDAP服务器的全局目录

Question

首先是问题，稍后是解释： 如何获得给定LDAP服务器的GC服务器？

为了理解我的需求，让我解释一下：

我必须扩展Henning Krause的ExchangeAddressListService （我不确定是否应该/可以将Henning的所有代码都放到这篇文章中吗？）以获得有用的调试输出：

private DirectoryEntry GetDirectoryEntry(string path, string protocol)
{
    var ldapPath = string.IsNullOrEmpty(path) ? string.Format("{0}:", protocol) : string.Format("{0}://{1}", protocol, path);
    dbg.Add("Getting DirectoryEntry for path " + ldapPath);
    return new DirectoryEntry(ldapPath);
}
public ActiveDirectoryConnection(Debug dbg)
{
    this.dbg = dbg;
}

并允许选择某个域：

internal AddressList(string path, ActiveDirectoryConnection connection, string domain)
{
    _Path = path;
    _Connection = connection;
    _Domain = domain;
}

...

private IEnumerable<AddressList> GetAddressLists(string containerName)
{
    string exchangeRootPath;
    using (var root = _Connection.GetLdapDirectoryEntry(_Domain+"/RootDSE"))
    ...
        foreach (SearchResult addressBook in searchResultCollection)
        {
            yield return
                new AddressList((string)addressBook.Properties["distinguishedName"][0], _Connection, _Domain);
        }
    ...
}

现在我对域有问题，因为似乎对于某些域SOMEDOMAIN ，无法通过GC://SOMEDOMAIN访问全局目录。 这是我使用的代码：

var domain = User.Identity.Name.Split('\\')[0]; // SOMEDOMAIN\SomeUser -> Domain is SOMEDOMAIN
dbg.Add("User NETBIOS domain is "+domain);
AddressListService addressListService = new ExchangeAddressListService(connection,domain);
IEnumerable<AddressList> addressLists = addressListService.GetGlobalAddressLists();
AddressList addressList = addressLists.First()
try {
    IEnumerable<SearchResult> searchResults = addressList.GetMembers("displayName", "distinguishedname", "mail")
} catch(Exception e) {
    dbg.Add("Error in GetMembers: "+e.Message);
    return new AjaxAnswer(dbg.Flush());
}

它产生错误日志：

User NETBIOS domain is SOMEDOMAIN
Getting DirectoryEntry for path LDAP://SOMEDOMAIN/RootDSE
Getting DirectoryEntry for path LDAP://CN=Microsoft Exchange, CN=Services, CN=Configuration,DC=somedomain,DC=net
Getting DirectoryEntry for path LDAP://CN=All Global Address Lists,CN=Address Lists Container, CN=MYMAIL,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=somedomain,DC=net
Getting DirectoryEntry for path LDAP://CN=Default Global Address List,CN=All Global Address Lists,CN=Address Lists Container,CN=MYMAIL,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=somedomain,DC=net
Getting DirectoryEntry for path GC://SOMEDOMAIN
Error in GetMembers: The server is not operational.

Answer 1

并非所有DC都是GC。 因此，如果SOMEDOMAIN不是GC， GC://SOMEDOMAIN可能会失败。
在我的项目中，我使用DsGetDcName Win32函数来发现GC。

DsGetDcName函数的详细信息：

http://msdn.microsoft.com/en-us/library/ms675983%28v=vs.85%29.aspx

请参阅以下有关如何拨通呼叫的电话：

http://www.pinvoke.net/default.aspx/netapi32.dsgetdcname

据我所知System.DirectoryServices.ActiveDirectory还提供了用于处理GC的类。
例如Forest.GlobalCatalogs
我已经使用了DsGetDcName函数，所以以前从未尝试过。