154 lines
3.1 KiB
C++
154 lines
3.1 KiB
C++
/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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iisassoc.hxx
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Abstract:
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This include file contains the declaration of the IIS_ASSOCIATION class.
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An IIS_ASSOCIATION is used to create an N-way association between
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IIS_ENDPOINTs and IIS_SERVER_INSTANCEs.
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The current IIS_ASSOCIATION is hash based. It may hash on either the
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IP address, the host name, or both. The hash method is specified when
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the object is constructed.
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Author:
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Keith Moore (keithmo) 16-Jan-1997
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Revision History:
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--*/
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#ifndef _IISASSOC_HXX_
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#define _IISASSOC_HXX_
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//
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// We will need to do some perf tuning to get a more reasonable value for
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// this number. We may need to make this metabase configurable, or at least
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// base it on the 'size' of the server.
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//
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#define DEFAULT_ASSOCIATION_HASH_BUCKETS 97
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typedef
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BOOL
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(WINAPI * LPFN_ASSOCIATION_CALLBACK)(
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IN LPVOID CallbackContext,
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IN LPVOID DescriptorContext,
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IN DWORD IpAddress,
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IN const CHAR * HostName
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);
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class IIS_ASSOCIATION {
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public:
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//
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// This hash context is used to avoid redundant hash context calculations
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// while searching through multiple associations.
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//
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typedef struct _HASH_CONTEXT {
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DWORD IpAddressHash;
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DWORD HostNameHash;
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} HASH_CONTEXT, *PHASH_CONTEXT;
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static
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VOID
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InitializeHashContext(
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OUT PHASH_CONTEXT HashContext
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) {
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HashContext->IpAddressHash = 0;
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HashContext->HostNameHash = 0;
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}
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//
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// Usual constructor/destructor stuff.
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//
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IIS_ASSOCIATION(
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IN BOOL HashIpAddress,
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IN BOOL HashHostName,
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IN INT NumHashBuckets = DEFAULT_ASSOCIATION_HASH_BUCKETS
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);
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~IIS_ASSOCIATION();
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//
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// Descriptor management.
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//
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DWORD
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AddDescriptor(
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IN DWORD IpAddress,
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IN const CHAR * HostName OPTIONAL,
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IN LPVOID Context,
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IN OUT PHASH_CONTEXT HashContext = NULL
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);
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DWORD
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LookupDescriptor(
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IN DWORD IpAddress,
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IN const CHAR * HostName OPTIONAL,
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OUT LPVOID *Context,
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IN OUT PHASH_CONTEXT HashContext = NULL
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);
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DWORD
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RemoveDescriptor(
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IN DWORD IpAddress,
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IN const CHAR * HostName OPTIONAL,
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OUT LPVOID *Context,
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IN OUT PHASH_CONTEXT HashContext = NULL
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);
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VOID
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EnumDescriptors(
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IN LPFN_ASSOCIATION_CALLBACK Callback,
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IN LPVOID CallbackContext
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);
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private:
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VOID
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CalculateHash(
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IN DWORD IpAddress,
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IN const CHAR * HostName OPTIONAL,
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OUT PHASH_CONTEXT HashContext
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);
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struct _HASH_ENTRY *
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FindDescriptor(
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IN DWORD IpAddress,
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IN const CHAR * HostName OPTIONAL,
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IN PHASH_CONTEXT HashContext
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);
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struct _HASH_ENTRY *
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CreateHashEntry(
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IN DWORD IpAddress,
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IN const CHAR * HostName OPTIONAL,
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IN PHASH_CONTEXT HashContext
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);
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INT m_NumHashBuckets;
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PLIST_ENTRY m_HashBuckets;
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BOOL m_HashIpAddress;
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BOOL m_HashHostName;
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}; // IIS_ASSOCIATION
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#endif // _IISASSOC_HXX_
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