wine/dlls/netapi32/nbnamecache.h
2008-04-09 12:07:39 +02:00

83 lines
3.3 KiB
C

/* Copyright (c) 2003 Juan Lang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef __WINE_NBNAMECACHE_H
#define __WINE_NBNAMECACHE_H
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "nb30.h"
struct NBNameCache;
/* Represents an entry in the name cache. If the NetBIOS name is known, it's
* in nbname. Otherwise, nbname begins with '*'. numAddresses defines the
* number of addresses in addresses.
* Notice that it allows multiple addresses per name, but doesn't explicitly
* allow group names. That's because all names so far are unique; if a use for
* group names comes up, adding a flag here is simple enough.
* Also, only the first NCBNAMSZ - 1 bytes are considered significant. This is
* because a name may have been resolved using DNS, and the suffix byte is
* always truncated for DNS lookups.
*/
typedef struct _NBNameCacheEntry
{
UCHAR name[NCBNAMSZ];
UCHAR nbname[NCBNAMSZ];
DWORD numAddresses;
DWORD addresses[1];
} NBNameCacheEntry;
/* Functions that create, manipulate, and destroy a name cache. Thread-safe,
* with the exception of NBNameCacheDestroy--ensure that no other threads are
* manipulating the cache before destroying it.
*/
/* Allocates a new name cache from heap, and sets the expire time on new
* entries to entryExpireTimeMS after a cache entry is added.
*/
struct NBNameCache *NBNameCacheCreate(HANDLE heap, DWORD entryExpireTimeMS);
/* Adds an entry to the cache. The entry is assumed to have been allocated
* from the same heap as the name cache; the name cache will own the entry
* from now on. The entry's expire time is initialized at this time to
* entryExpireTimeMS + the current time in MS. If an existing entry with the
* same name was in the cache, the entry is replaced. Returns TRUE on success
* or FALSE on failure.
*/
BOOL NBNameCacheAddEntry(struct NBNameCache *cache, NBNameCacheEntry *entry);
/* Finds the entry with name name in the cache and returns a pointer to it, or
* NULL if it isn't found.
*/
const NBNameCacheEntry *NBNameCacheFindEntry(struct NBNameCache *cache,
const UCHAR name[NCBNAMSZ]);
/* If the entry with name name is in the cache, updates its nbname member to
* nbname. The entry's expire time is implicitly updated to entryExpireTimeMS
* + the current time in MS, since getting the NetBIOS name meant validating
* the name and address anyway.
* Returns TRUE on success or FALSE on failure.
*/
BOOL NBNameCacheUpdateNBName(struct NBNameCache *cache,
const UCHAR name[NCBNAMSZ], const UCHAR nbname[NCBNAMSZ]);
void NBNameCacheDestroy(struct NBNameCache *cache);
#endif /* ndef __WINE_NBNAMECACHE_H */