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Sweden-Number/dlls/dplayx/name_server.c

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/* DPLAYX.DLL name server implementation
*
* Copyright 2000-2001 - Peter Hunnisett
*
* 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
*/
/* NOTE: Methods with the NS_ prefix are name server methods */
#include <stdarg.h>
#include <string.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "mmsystem.h"
#include "dplayx_global.h"
#include "name_server.h"
#include "wine/dplaysp.h"
#include "dplayx_messages.h"
#include "dplayx_queue.h"
/* FIXME: Need to create a crit section, store and use it */
WINE_DEFAULT_DEBUG_CHANNEL(dplay);
/* NS specific structures */
struct NSCacheData
{
DPQ_ENTRY(NSCacheData) next;
DWORD dwTime; /* Time at which data was last known valid */
LPDPSESSIONDESC2 data;
LPVOID lpNSAddrHdr;
};
typedef struct NSCacheData NSCacheData, *lpNSCacheData;
struct NSCache
{
lpNSCacheData present; /* keep track of what is to be looked at when walking */
DPQ_HEAD(NSCacheData) first;
BOOL bNsIsLocal;
LPVOID lpLocalAddrHdr; /* FIXME: Not yet used */
LPVOID lpRemoteAddrHdr; /* FIXME: Not yet used */
};
typedef struct NSCache NSCache, *lpNSCache;
/* Function prototypes */
static DPQ_DECL_DELETECB( cbDeleteNSNodeFromHeap, lpNSCacheData );
/* Name Server functions
* ---------------------
*/
void NS_SetLocalComputerAsNameServer( LPCDPSESSIONDESC2 lpsd, LPVOID lpNSInfo )
{
#if 0
/* FIXME: Remove this method? */
DPLAYX_SetLocalSession( lpsd );
#endif
lpNSCache lpCache = (lpNSCache)lpNSInfo;
lpCache->bNsIsLocal = TRUE;
}
void NS_SetRemoteComputerAsNameServer( LPCDPSESSIONDESC2 lpsd, LPVOID lpNSInfo )
{
lpNSCache lpCache = (lpNSCache)lpNSInfo;
lpCache->bNsIsLocal = FALSE;
}
static DPQ_DECL_COMPARECB( cbUglyPig, GUID )
{
return IsEqualGUID( elem1, elem2 );
}
/* Store the given NS remote address for future reference */
void NS_AddRemoteComputerAsNameServer( LPCVOID lpcNSAddrHdr,
DWORD dwHdrSize,
LPCDPMSG_ENUMSESSIONSREPLY lpcMsg,
LPVOID lpNSInfo )
{
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 );
}
LPVOID NS_GetNSAddr( LPVOID lpNSInfo )
{
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
return lpCache->first.lpQHFirst->lpNSAddrHdr;
#else
/* FIXME: Should convert over to this */
return lpCache->bNsIsLocal ? lpCache->lpLocalAddrHdr
: lpCache->lpRemoteAddrHdr;
#endif
}
/* Get the magic number associated with the Name Server */
DWORD NS_GetNsMagic( LPVOID lpNSInfo )
{
LPDWORD lpHdrInfo = NS_GetNSAddr( lpNSInfo );
return lpHdrInfo[1];
}
/* Get the magic number associated with the non NS end */
DWORD NS_GetOtherMagic( LPVOID lpNSInfo )
{
lpNSCache lpCache = (lpNSCache)lpNSInfo;
return ((LPDWORD)lpCache->lpLocalAddrHdr)[1];
}
void NS_SetLocalAddr( LPVOID lpNSInfo, LPCVOID lpHdr, DWORD dwHdrSize )
{
lpNSCache lpCache = (lpNSCache)lpNSInfo;
lpCache->lpLocalAddrHdr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, dwHdrSize );
CopyMemory( lpCache->lpLocalAddrHdr, lpHdr, dwHdrSize );
}
/* This function is responsible for sending a request for all other known
nameservers to send us what sessions they have registered locally
*/
HRESULT NS_SendSessionRequestBroadcast( LPCGUID lpcGuid,
DWORD dwFlags,
const SPINITDATA *lpSpData )
{
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) ? TRUE : FALSE;
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 );
}
/* Delete a name server node which has been allocated on the heap */
static DPQ_DECL_DELETECB( cbDeleteNSNodeFromHeap, lpNSCacheData )
{
/* NOTE: This proc doesn't deal with the walking pointer */
/* FIXME: Memory leak on data (contained ptrs) */
HeapFree( GetProcessHeap(), 0, elem->data );
HeapFree( GetProcessHeap(), 0, elem->lpNSAddrHdr );
HeapFree( GetProcessHeap(), 0, elem );
}
/* Render all data in a session cache invalid */
void NS_InvalidateSessionCache( LPVOID lpNSInfo )
{
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;
}
/* Create and initialize a session cache */
BOOL NS_InitializeSessionCache( LPVOID* lplpNSInfo )
{
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;
}
/* Delete a session cache */
void NS_DeleteSessionCache( LPVOID lpNSInfo )
{
NS_InvalidateSessionCache( (lpNSCache)lpNSInfo );
}
/* Reinitialize the present pointer for this cache */
void NS_ResetSessionEnumeration( LPVOID lpNSInfo )
{
((lpNSCache)lpNSInfo)->present = ((lpNSCache)lpNSInfo)->first.lpQHFirst;
}
LPDPSESSIONDESC2 NS_WalkSessions( LPVOID lpNSInfo )
{
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;
}
/* This method should check to see if there are any sessions which are
* older than the criteria. If so, just delete that information.
*/
/* FIXME: This needs to be called by some periodic timer */
void NS_PruneSessionCache( LPVOID lpNSInfo )
{
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 );
}
}
/* NAME SERVER Message stuff */
void NS_ReplyToEnumSessionsRequest( LPCVOID lpcMsg,
LPVOID* lplpReplyData,
LPDWORD lpdwReplySize,
IDirectPlay2Impl* lpDP )
{
LPDPMSG_ENUMSESSIONSREPLY rmsg;
DWORD dwVariableSize;
DWORD dwVariableLen;
/* LPCDPMSG_ENUMSESSIONSREQUEST msg = (LPDPMSG_ENUMSESSIONSREQUEST)lpcMsg; */
BOOL bAnsi = TRUE; /* FIXME: This needs to be in the DPLAY interface */
FIXME( ": few fixed + need to check request for response\n" );
if (bAnsi)
{
dwVariableLen = MultiByteToWideChar( CP_ACP, 0,
lpDP->dp2->lpSessionDesc->u1.lpszSessionNameA,
-1, NULL, 0 );
}
else
{
dwVariableLen = strlenW( lpDP->dp2->lpSessionDesc->u1.lpszSessionName ) + 1;
}
dwVariableSize = dwVariableLen * sizeof( WCHAR );
*lpdwReplySize = lpDP->dp2->spData.dwSPHeaderSize +
sizeof( *rmsg ) + dwVariableSize;
*lplpReplyData = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
*lpdwReplySize );
rmsg = (LPDPMSG_ENUMSESSIONSREPLY)( (BYTE*)*lplpReplyData +
lpDP->dp2->spData.dwSPHeaderSize);
rmsg->envelope.dwMagic = DPMSGMAGIC_DPLAYMSG;
rmsg->envelope.wCommandId = DPMSGCMD_ENUMSESSIONSREPLY;
rmsg->envelope.wVersion = DPMSGVER_DP6;
CopyMemory( &rmsg->sd, lpDP->dp2->lpSessionDesc,
lpDP->dp2->lpSessionDesc->dwSize );
rmsg->dwUnknown = 0x0000005c;
if( bAnsi )
{
MultiByteToWideChar( CP_ACP, 0, lpDP->dp2->lpSessionDesc->u1.lpszSessionNameA, -1,
(LPWSTR)(rmsg+1), dwVariableLen );
}
else
{
strcpyW( (LPWSTR)(rmsg+1), lpDP->dp2->lpSessionDesc->u1.lpszSessionName );
}
}
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