name_server.h File Reference

#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "dplay.h"
#include "wine/dplaysp.h"
#include "dplayx_messages.h"
#include "dplay_global.h"

Include dependency graph for name_server.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions
void	NS_SetLocalComputerAsNameServer (LPCDPSESSIONDESC2 lpsd, LPVOID lpNSInfo)
void	NS_AddRemoteComputerAsNameServer (LPCVOID lpNSAddrHdr, DWORD dwHdrSize, LPCDPMSG_ENUMSESSIONSREPLY lpcMsg, DWORD msgSize, LPVOID lpNSInfo)
void	NS_SetLocalAddr (LPVOID lpNSInfo, LPCVOID lpHdr, DWORD dwHdrSize)
void	NS_ReplyToEnumSessionsRequest (LPCVOID lpcMsg, LPVOID *lplpReplyData, LPDWORD lpdwReplySize, IDirectPlayImpl *lpDP)
HRESULT	NS_SendSessionRequestBroadcast (LPCGUID lpcGuid, DWORD dwFlags, WCHAR *password, const SPINITDATA *lpSpData)
BOOL	NS_InitializeSessionCache (LPVOID *lplpNSInfo)
void	NS_DeleteSessionCache (LPVOID lpNSInfo)
void	NS_InvalidateSessionCache (LPVOID lpNSInfo)
void	NS_ResetSessionEnumeration (LPVOID lpNSInfo)
LPDPSESSIONDESC2	NS_WalkSessions (LPVOID lpNSInfo, void **spMessageHeader, BOOL ansi)
void	NS_PruneSessionCache (LPVOID lpNSInfo)

Function Documentation

NS_AddRemoteComputerAsNameServer()

void NS_AddRemoteComputerAsNameServer	(	LPCVOID	lpNSAddrHdr,
		DWORD	dwHdrSize,
		LPCDPMSG_ENUMSESSIONSREPLY	lpcMsg,
		DWORD	msgSize,
		LPVOID	lpNSInfo
	)

Definition at line 101 of file name_server.c.

{
  lpNSCache     lpCache = (lpNSCache)lpNSInfo;
  lpNSCacheData lpCacheNode;
  DPSESSIONDESC2 dpsd;
  DWORD maxNameLength;
  DWORD nameLength;
 
  TRACE( "%p, %p, %p\n", lpcNSAddrHdr, lpcMsg, lpNSInfo );
 
  if ( msgSize < sizeof( DPMSG_ENUMSESSIONSREPLY ) + sizeof( WCHAR ) )
    return;
 
  maxNameLength = (msgSize - sizeof( DPMSG_ENUMSESSIONSREPLY )) / sizeof( WCHAR );
  nameLength = wcsnlen( (WCHAR *) (lpcMsg + 1), maxNameLength );
  if ( nameLength == maxNameLength )
    return;
 
  /* See if we can find this session. If we can, remove it as it's a dup */
  DPQ_REMOVE_ENTRY_CB( lpCache->first, next, data->guidInstance, cbUglyPig,
                       lpcMsg->sd.guidInstance, lpCacheNode );
 
  if( lpCacheNode != NULL )
  {
    TRACE( "Duplicate session entry for %s removed - updated version kept\n",
           debugstr_guid( &lpCacheNode->data->guidInstance ) );
    cbReleaseNSNode( lpCacheNode );
  }
 
  /* Add this to the list */
  lpCacheNode = calloc( 1, sizeof( *lpCacheNode ) );
 
  if( lpCacheNode == NULL )
  {
    ERR( "no memory for NS node\n" );
    return;
  }
 
  lpCacheNode->lpNSAddrHdr = malloc( dwHdrSize );
  CopyMemory( lpCacheNode->lpNSAddrHdr, lpcNSAddrHdr, dwHdrSize );
 
  dpsd = lpcMsg->sd;
  dpsd.lpszSessionName = (WCHAR *) (lpcMsg + 1);
  dpsd.lpszPassword = NULL;
 
  lpCacheNode->data = DP_DuplicateSessionDesc( &dpsd, FALSE, FALSE );
 
  if( lpCacheNode->data == NULL )
  {
    ERR( "no memory for SESSIONDESC2\n" );
    free( lpCacheNode );
    return;
  }
 
  lpCacheNode->dataA = DP_DuplicateSessionDesc( &dpsd, TRUE, FALSE );
 
  if( lpCacheNode->dataA == NULL )
  {
    ERR( "no memory for SESSIONDESC2\n" );
    free( lpCacheNode->data );
    free( lpCacheNode );
    return;
  }
 
  lpCacheNode->ref = 1;
  lpCacheNode->dwTime = timeGetTime();
 
  DPQ_INSERT(lpCache->first, lpCacheNode, next );
 
  /* Use this message as an opportunity to weed out any old sessions so
   * that we don't enum them again
   */
  NS_PruneSessionCache( lpNSInfo );
}

Referenced by DP_HandleMessage().

NS_DeleteSessionCache()

void NS_DeleteSessionCache

(

LPVOID

lpNSInfo

)

Definition at line 283 of file name_server.c.

{
  NS_InvalidateSessionCache( (lpNSCache)lpNSInfo );
  NS_ResetSessionEnumeration( (lpNSCache)lpNSInfo );
}

Referenced by DP_DestroyDirectPlay2().

NS_InitializeSessionCache()

BOOL NS_InitializeSessionCache

(

LPVOID *

lplpNSInfo

)

Definition at line 262 of file name_server.c.

{
  lpNSCache lpCache = calloc( 1, sizeof( *lpCache ) );
 
  *lplpNSInfo = lpCache;
 
  if( lpCache == NULL )
  {
    return FALSE;
  }
 
  DPQ_INIT(lpCache->walkFirst);
  DPQ_INIT(lpCache->first);
  lpCache->present = NULL;
 
  lpCache->bNsIsLocal = FALSE;
 
  return TRUE;
}

Referenced by DP_CreateDirectPlay2().

NS_InvalidateSessionCache()

void NS_InvalidateSessionCache

(

LPVOID

lpNSInfo

)

Definition at line 245 of file name_server.c.

{
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  if( lpCache == NULL )
  {
    ERR( ": invalidate nonexistent cache\n" );
    return;
  }
 
  DPQ_DELETEQ( lpCache->first, next, lpNSCacheData, cbReleaseNSNode );
 
  lpCache->bNsIsLocal = FALSE;
 
}

Referenced by DP_IF_EnumSessions(), and NS_DeleteSessionCache().

NS_PruneSessionCache()

void NS_PruneSessionCache

(

LPVOID

lpNSInfo

)

Definition at line 332 of file name_server.c.

{
  lpNSCache     lpCache = lpNSInfo;
 
  const DWORD dwPresentTime = timeGetTime();
  const DWORD dwPrunePeriod = DPMSG_WAIT_60_SECS; /* is 60 secs enough? */
 
  /* This silly little algorithm is based on the fact we keep entries in
   * the queue in a time based order. It also assumes that it is not possible
   * to wrap around over yourself (which is not unreasonable).
   * The if statements verify if the first entry in the queue is less
   * than dwPrunePeriod old depending on the "clock" roll over.
   */
  for( ;; )
  {
    lpNSCacheData lpFirstData;
 
    if( DPQ_IS_EMPTY(lpCache->first) )
    {
      /* Nothing to prune */
      break;
    }
 
    /* Deal with time in a wrap around safe manner - unsigned arithmetic.
     * Check the difference in time */
    if( (dwPresentTime - (DPQ_FIRST(lpCache->first)->dwTime)) < dwPrunePeriod )
    {
      /* First entry has not expired yet; don't prune */
      break;
    }
 
    lpFirstData = DPQ_FIRST(lpCache->first);
    DPQ_REMOVE( lpCache->first, DPQ_FIRST(lpCache->first), next );
    cbReleaseNSNode( lpFirstData );
  }
 
}

Referenced by DP_IF_EnumSessions(), and NS_AddRemoteComputerAsNameServer().

NS_ReplyToEnumSessionsRequest()

void NS_ReplyToEnumSessionsRequest	(	LPCVOID	lpcMsg,
		LPVOID *	lplpReplyData,
		LPDWORD	lpdwReplySize,
		IDirectPlayImpl *	lpDP
	)

NS_ResetSessionEnumeration()

void NS_ResetSessionEnumeration

(

LPVOID

lpNSInfo

)

Definition at line 290 of file name_server.c.

{
  NSCache *cache = (NSCache *) lpNSInfo;
  NSCacheData *data;
 
  DPQ_DELETEQ( cache->walkFirst, walkNext, lpNSCacheData, cbReleaseNSNode );
 
  for( data = DPQ_FIRST( cache->first ); data; data = DPQ_NEXT( data->next ) )
  {
    InterlockedIncrement( &data->ref );
    DPQ_INSERT( cache->walkFirst, data, walkNext );
  }
 
  ((lpNSCache)lpNSInfo)->present = ((lpNSCache)lpNSInfo)->walkFirst.lpQHFirst;
}

Referenced by DP_IF_EnumSessions(), DP_SecureOpen(), and NS_DeleteSessionCache().

NS_SendSessionRequestBroadcast()

HRESULT NS_SendSessionRequestBroadcast	(	LPCGUID	lpcGuid,
		DWORD	dwFlags,
		WCHAR *	password,
		const SPINITDATA *	lpSpData
	)

Definition at line 192 of file name_server.c.

{
  DPSP_ENUMSESSIONSDATA data;
  LPDPMSG_ENUMSESSIONSREQUEST lpMsg;
  DWORD passwordSize = 0;
 
  TRACE( "enumerating for guid %s\n", debugstr_guid( lpcGuid ) );
 
  if ( password )
    passwordSize = (wcslen( password ) + 1) * sizeof( WCHAR );
 
  data.dwMessageSize = lpSpData->dwSPHeaderSize + sizeof( *lpMsg ) + passwordSize;
  data.lpMessage = calloc( 1, data.dwMessageSize );
  data.lpISP = lpSpData->lpISP;
  data.bReturnStatus = (dwFlags & DPENUMSESSIONS_RETURNSTATUS) != 0;
 
 
  lpMsg = (LPDPMSG_ENUMSESSIONSREQUEST)(((BYTE*)data.lpMessage)+lpSpData->dwSPHeaderSize);
 
  /* Setup EnumSession request message */
  lpMsg->envelope.dwMagic    = DPMSGMAGIC_DPLAYMSG;
  lpMsg->envelope.wCommandId = DPMSGCMD_ENUMSESSIONSREQUEST;
  lpMsg->envelope.wVersion   = DPMSGVER_DP6;
 
  lpMsg->passwordOffset = password ? sizeof( DPMSG_ENUMSESSIONSREQUEST ) : 0;
  lpMsg->dwFlags        = dwFlags;
 
  lpMsg->guidApplication = *lpcGuid;
 
  memcpy( lpMsg + 1, password, passwordSize );
 
  return (lpSpData->lpCB->EnumSessions)( &data );
}

Referenced by DP_EnumSessionsSendAsyncRequestThread(), and DP_IF_EnumSessions().

NS_SetLocalAddr()

void NS_SetLocalAddr	(	LPVOID	lpNSInfo,
		LPCVOID	lpHdr,
		DWORD	dwHdrSize
	)

Definition at line 180 of file name_server.c.

{
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  lpCache->lpLocalAddrHdr = malloc( dwHdrSize );
 
  CopyMemory( lpCache->lpLocalAddrHdr, lpHdr, dwHdrSize );
}

Referenced by DP_HandleMessage().

NS_SetLocalComputerAsNameServer()

void NS_SetLocalComputerAsNameServer	(	LPCDPSESSIONDESC2	lpsd,
		LPVOID	lpNSInfo
	)

Definition at line 88 of file name_server.c.

{
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  lpCache->bNsIsLocal = TRUE;
}

Referenced by DP_SecureOpen().

NS_WalkSessions()

LPDPSESSIONDESC2 NS_WalkSessions	(	LPVOID	lpNSInfo,
		void **	spMessageHeader,
		BOOL	ansi
	)

Definition at line 306 of file name_server.c.

{
  LPDPSESSIONDESC2 lpSessionDesc;
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  /* Test for end of the list */
  if( lpCache->present == NULL )
  {
    return NULL;
  }
 
  lpSessionDesc = ansi ? lpCache->present->dataA : lpCache->present->data;
 
  if( spMessageHeader )
    *spMessageHeader = lpCache->present->lpNSAddrHdr;
 
  /* Advance tracking pointer */
  lpCache->present = lpCache->present->walkNext.lpQNext;
 
  return lpSessionDesc;
}

Referenced by DP_InvokeEnumSessionCallbacks(), and DP_SecureOpen().