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) DECLSPEC_HIDDEN
void	NS_AddRemoteComputerAsNameServer (LPCVOID lpNSAddrHdr, DWORD dwHdrSize, LPCDPMSG_ENUMSESSIONSREPLY lpcMsg, LPVOID lpNSInfo) DECLSPEC_HIDDEN
LPVOID	NS_GetNSAddr (LPVOID lpNSInfo) DECLSPEC_HIDDEN
DWORD	NS_GetNsMagic (LPVOID lpNSInfo) DECLSPEC_HIDDEN
void	NS_SetLocalAddr (LPVOID lpNSInfo, LPCVOID lpHdr, DWORD dwHdrSize) DECLSPEC_HIDDEN
void	NS_ReplyToEnumSessionsRequest (LPCVOID lpcMsg, LPVOID *lplpReplyData, LPDWORD lpdwReplySize, IDirectPlayImpl *lpDP) DECLSPEC_HIDDEN
HRESULT	NS_SendSessionRequestBroadcast (LPCGUID lpcGuid, DWORD dwFlags, const SPINITDATA *lpSpData) DECLSPEC_HIDDEN
BOOL	NS_InitializeSessionCache (LPVOID *lplpNSInfo) DECLSPEC_HIDDEN
void	NS_DeleteSessionCache (LPVOID lpNSInfo) DECLSPEC_HIDDEN
void	NS_InvalidateSessionCache (LPVOID lpNSInfo) DECLSPEC_HIDDEN
void	NS_ResetSessionEnumeration (LPVOID lpNSInfo) DECLSPEC_HIDDEN
LPDPSESSIONDESC2	NS_WalkSessions (LPVOID lpNSInfo) DECLSPEC_HIDDEN
void	NS_PruneSessionCache (LPVOID lpNSInfo) DECLSPEC_HIDDEN

Function Documentation

NS_AddRemoteComputerAsNameServer()

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

Definition at line 87 of file name_server.c.

{
  DWORD len;
  lpNSCache     lpCache = (lpNSCache)lpNSInfo;
  lpNSCacheData lpCacheNode;
 
  TRACE( "%p, %p, %p\n", lpcNSAddrHdr, lpcMsg, lpNSInfo );
 
  /* 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 ) );
    cbDeleteNSNodeFromHeap( lpCacheNode );
  }
 
  /* Add this to the list */
  lpCacheNode = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof( *lpCacheNode ) );
 
  if( lpCacheNode == NULL )
  {
    ERR( "no memory for NS node\n" );
    return;
  }
 
  lpCacheNode->lpNSAddrHdr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
                                        dwHdrSize );
  CopyMemory( lpCacheNode->lpNSAddrHdr, lpcNSAddrHdr, dwHdrSize );
 
  lpCacheNode->data = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof( *(lpCacheNode->data) ) );
 
  if( lpCacheNode->data == NULL )
  {
    ERR( "no memory for SESSIONDESC2\n" );
    HeapFree( GetProcessHeap(), 0, lpCacheNode );
    return;
  }
 
  *lpCacheNode->data = lpcMsg->sd;
  len = WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)(lpcMsg+1), -1, NULL, 0, NULL, NULL );
  if ((lpCacheNode->data->u1.lpszSessionNameA = HeapAlloc( GetProcessHeap(), 0, len )))
  {
      WideCharToMultiByte( CP_ACP, 0, (LPCWSTR)(lpcMsg+1), -1,
                           lpCacheNode->data->u1.lpszSessionNameA, len, NULL, NULL );
  }
 
  lpCacheNode->dwTime = timeGetTime();
 
  DPQ_INSERT(lpCache->first, lpCacheNode, next );
 
  lpCache->present = lpCacheNode;
 
  /* 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 );
}

Referenced by DP_DestroyDirectPlay2().

NS_GetNSAddr()

LPVOID NS_GetNSAddr

(

LPVOID

lpNSInfo

)

Definition at line 151 of file name_server.c.

{
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  FIXME( ":quick stub\n" );
 
  /* Ok. Cheat and don't search for the correct stuff just take the first.
   * FIXME: In the future how are we to know what is _THE_ enum we used?
   *        This is going to have to go into dplay somehow. Perhaps it
   *        comes back with app server id for the join command! Oh... that
   *        must be it. That would make this method obsolete once that's
   *        in place.
   */
#if 1
  if ( lpCache->first.lpQHFirst )
    return lpCache->first.lpQHFirst->lpNSAddrHdr;
 
  return NULL;
#else
  /* FIXME: Should convert over to this */
  return lpCache->bNsIsLocal ? lpCache->lpLocalAddrHdr
                             : lpCache->lpRemoteAddrHdr;
#endif
}

Referenced by DP_SecureOpen(), and NS_GetNsMagic().

NS_GetNsMagic()

DWORD NS_GetNsMagic

(

LPVOID

lpNSInfo

)

Definition at line 177 of file name_server.c.

{
  LPDWORD lpHdrInfo = NS_GetNSAddr( lpNSInfo );
 
  return lpHdrInfo[1];
}

Referenced by DP_MSG_ForwardPlayerCreation().

NS_InitializeSessionCache()

BOOL NS_InitializeSessionCache

(

LPVOID *

lplpNSInfo

)

Definition at line 263 of file name_server.c.

{
  lpNSCache lpCache = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof( *lpCache ) );
 
  *lplpNSInfo = lpCache;
 
  if( lpCache == NULL )
  {
    return FALSE;
  }
 
  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 243 of file name_server.c.

{
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  if( lpCache == NULL )
  {
    ERR( ": invalidate nonexistent cache\n" );
    return;
  }
 
  DPQ_DELETEQ( lpCache->first, next, lpNSCacheData, cbDeleteNSNodeFromHeap );
 
  /* NULL out the walking pointer */
  lpCache->present = NULL;
 
  lpCache->bNsIsLocal = FALSE;
 
}

Referenced by IDirectPlay4Impl_EnumSessions(), and NS_DeleteSessionCache().

NS_PruneSessionCache()

void NS_PruneSessionCache

(

LPVOID

lpNSInfo

)

Definition at line 319 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 );
    cbDeleteNSNodeFromHeap( lpFirstData );
  }
 
}

Referenced by DP_InvokeEnumSessionCallbacks(), 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 289 of file name_server.c.

{
  ((lpNSCache)lpNSInfo)->present = ((lpNSCache)lpNSInfo)->first.lpQHFirst;
}

Referenced by DP_InvokeEnumSessionCallbacks().

NS_SendSessionRequestBroadcast()

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

Definition at line 196 of file name_server.c.

{
  DPSP_ENUMSESSIONSDATA data;
  LPDPMSG_ENUMSESSIONSREQUEST lpMsg;
 
  TRACE( "enumerating for guid %s\n", debugstr_guid( lpcGuid ) );
 
  /* Get the SP to deal with sending the EnumSessions request */
  FIXME( ": not all data fields are correct\n" );
 
  data.dwMessageSize = lpSpData->dwSPHeaderSize + sizeof( *lpMsg ); /*FIXME!*/
  data.lpMessage = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
                              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->dwPasswordSize = 0; /* FIXME: If enumerating passwords..? */
  lpMsg->dwFlags        = dwFlags;
 
  lpMsg->guidApplication = *lpcGuid;
 
  return (lpSpData->lpCB->EnumSessions)( &data );
}

Referenced by DP_EnumSessionsSendAsyncRequestThread(), and IDirectPlay4Impl_EnumSessions().

NS_SetLocalAddr()

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

Definition at line 184 of file name_server.c.

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

Referenced by DP_HandleMessage().

NS_SetLocalComputerAsNameServer()

void NS_SetLocalComputerAsNameServer	(	LPCDPSESSIONDESC2	lpsd,
		LPVOID	lpNSInfo
	)

Definition at line 74 of file name_server.c.

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

Referenced by DP_SecureOpen().

NS_WalkSessions()

LPDPSESSIONDESC2 NS_WalkSessions

(

LPVOID

lpNSInfo

)

Definition at line 294 of file name_server.c.

{
  LPDPSESSIONDESC2 lpSessionDesc;
  lpNSCache lpCache = (lpNSCache)lpNSInfo;
 
  /* FIXME: The pointers could disappear when walking if a prune happens */
 
  /* Test for end of the list */
  if( lpCache->present == NULL )
  {
    return NULL;
  }
 
  lpSessionDesc = lpCache->present->data;
 
  /* Advance tracking pointer */
  lpCache->present = lpCache->present->next.lpQNext;
 
  return lpSessionDesc;
}

Referenced by DP_InvokeEnumSessionCallbacks().