/*
 *	OLE32 proxy/stub handler
 *
 *  Copyright 2002  Marcus Meissner
 *  Copyright 2001  Ove Kåven, TransGaming Technologies
 *
 * 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
 */

#include "config.h"

#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>

#define COBJMACROS
#define NONAMELESSUNION
#define NONAMELESSSTRUCT

#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "objbase.h"
#include "ole2.h"
#include "rpc.h"
#include "winerror.h"
#include "wtypes.h"

#include "compobj_private.h"
#include "moniker.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(ole);

static ULONG WINAPI RURpcProxyBufferImpl_Release(LPRPCPROXYBUFFER iface);

/* From msdn:
 *
 * The first time a client requests a pointer to an interface on a
 * particular object, COM loads an IClassFactory stub in the server
 * process and uses it to marshal the first pointer back to the
 * client. In the client process, COM loads the generic proxy for the
 * class factory object and calls its implementation of IMarshal to
 * unmarshal that first pointer. COM then creates the first interface
 * proxy and hands it a pointer to the RPC channel. Finally, COM returns
 * the IClassFactory pointer to the client, which uses it to call
 * IClassFactory::CreateInstance, passing it a reference to the interface.
 *
 * Back in the server process, COM now creates a new instance of the
 * object, along with a stub for the requested interface. This stub marshals
 * the interface pointer back to the client process, where another object
 * proxy is created, this time for the object itself. Also created is a
 * proxy for the requested interface, a pointer to which is returned to
 * the client. With subsequent calls to other interfaces on the object,
 * COM will load the appropriate interface stubs and proxies as needed.
 */
typedef struct _CFStub {
    const IRpcStubBufferVtbl   *lpvtbl;
    LONG			ref;

    LPUNKNOWN			pUnkServer;
} CFStub;

static HRESULT WINAPI
CFStub_QueryInterface(LPRPCSTUBBUFFER iface, REFIID riid, LPVOID *ppv) {
    if (IsEqualIID(&IID_IUnknown,riid)||IsEqualIID(&IID_IRpcStubBuffer,riid)) {
	*ppv = (LPVOID)iface;
	IUnknown_AddRef(iface);
	return S_OK;
    }
    FIXME("(%s), interface not supported.\n",debugstr_guid(riid));
    return E_NOINTERFACE;
}

static ULONG WINAPI
CFStub_AddRef(LPRPCSTUBBUFFER iface) {
    CFStub *This = (CFStub *)iface;
    return InterlockedIncrement(&This->ref);
}

static ULONG WINAPI
CFStub_Release(LPRPCSTUBBUFFER iface) {
    CFStub *This = (CFStub *)iface;
    ULONG ref;

    ref = InterlockedDecrement(&This->ref);
    if (!ref) {
        IRpcStubBuffer_Disconnect(iface);
        HeapFree(GetProcessHeap(),0,This);
    }
    return ref;
}

static HRESULT WINAPI
CFStub_Connect(LPRPCSTUBBUFFER iface, IUnknown *pUnkServer) {
    CFStub *This = (CFStub *)iface;

    This->pUnkServer = pUnkServer;
    IUnknown_AddRef(pUnkServer);
    return S_OK;
}

static void WINAPI
CFStub_Disconnect(LPRPCSTUBBUFFER iface) {
    CFStub *This = (CFStub *)iface;

    if (This->pUnkServer) {
        IUnknown_Release(This->pUnkServer);
        This->pUnkServer = NULL;
    }
}

static HRESULT WINAPI
CFStub_Invoke(
    LPRPCSTUBBUFFER iface,RPCOLEMESSAGE* msg,IRpcChannelBuffer* chanbuf
) {
    CFStub *This = (CFStub *)iface;
    HRESULT hres;

    if (msg->iMethod == 3) { /* CreateInstance */
	IID iid;
	IClassFactory	*classfac;
	IUnknown	*ppv;
	IStream		*pStm;
	STATSTG		ststg;
	ULARGE_INTEGER	newpos;
	LARGE_INTEGER	seekto;
	ULONG		res;

	if (msg->cbBuffer < sizeof(IID)) {
            FIXME("Not enough bytes in buffer (%d)?\n",msg->cbBuffer);
	    return E_FAIL;
	}
	memcpy(&iid,msg->Buffer,sizeof(iid));
	TRACE("->CreateInstance(%s)\n",debugstr_guid(&iid));
	hres = IUnknown_QueryInterface(This->pUnkServer,&IID_IClassFactory,(LPVOID*)&classfac);
	if (hres) {
	    FIXME("Ole server does not provide an IClassFactory?\n");
	    return hres;
	}
	hres = IClassFactory_CreateInstance(classfac,NULL,&iid,(LPVOID*)&ppv);
	IClassFactory_Release(classfac);
	msg->cbBuffer = 0;
	if (hres) {
	    FIXME("Failed to create an instance of %s\n",debugstr_guid(&iid));
	    goto getbuffer;
	}
	hres = CreateStreamOnHGlobal(0,TRUE,&pStm);
	if (hres) {
	    FIXME("Failed to create stream on hglobal\n");
	    goto getbuffer;
	}
	hres = IStream_Write(pStm, &ppv, sizeof(ppv), NULL);
	if (hres) {
	   ERR("IStream_Write failed, 0x%08x\n", hres);
	   goto getbuffer;
	}
	if (ppv) {
        hres = CoMarshalInterface(pStm,&iid,ppv,0,NULL,0);
        IUnknown_Release(ppv);
        if (hres) {
            FIXME("CoMarshalInterface failed, %x!\n",hres);
            goto getbuffer;
        }
    }
	hres = IStream_Stat(pStm,&ststg,0);
	if (hres) {
	    FIXME("Stat failed.\n");
	    goto getbuffer;
	}

	msg->cbBuffer = ststg.cbSize.u.LowPart;

getbuffer:
        IRpcChannelBuffer_GetBuffer(chanbuf, msg, &IID_IClassFactory);
        if (hres) return hres;

	seekto.u.LowPart = 0;seekto.u.HighPart = 0;
	hres = IStream_Seek(pStm,seekto,STREAM_SEEK_SET,&newpos);
	if (hres) {
            FIXME("IStream_Seek failed, %x\n",hres);
	    return hres;
	}
	hres = IStream_Read(pStm,msg->Buffer,msg->cbBuffer,&res);
	if (hres) {
            FIXME("Stream Read failed, %x\n",hres);
	    return hres;
	}
	IStream_Release(pStm);
	return S_OK;
    }
    FIXME("(%p,%p), stub!\n",msg,chanbuf);
    FIXME("iMethod is %d\n",msg->iMethod);
    FIXME("cbBuffer is %d\n",msg->cbBuffer);
    return E_FAIL;
}

static LPRPCSTUBBUFFER WINAPI
CFStub_IsIIDSupported(LPRPCSTUBBUFFER iface,REFIID riid) {
    FIXME("(%s), stub!\n",debugstr_guid(riid));
    return NULL;
}

static ULONG WINAPI
CFStub_CountRefs(LPRPCSTUBBUFFER iface) {
    FIXME("(), stub!\n");
    return 1;
}

static HRESULT WINAPI
CFStub_DebugServerQueryInterface(LPRPCSTUBBUFFER iface,void** ppv) {
    FIXME("(%p), stub!\n",ppv);
    return E_FAIL;
}
static void    WINAPI
CFStub_DebugServerRelease(LPRPCSTUBBUFFER iface,void *pv) {
    FIXME("(%p), stub!\n",pv);
}

static const IRpcStubBufferVtbl cfstubvt = {
    CFStub_QueryInterface,
    CFStub_AddRef,
    CFStub_Release,
    CFStub_Connect,
    CFStub_Disconnect,
    CFStub_Invoke,
    CFStub_IsIIDSupported,
    CFStub_CountRefs,
    CFStub_DebugServerQueryInterface,
    CFStub_DebugServerRelease
};

static HRESULT
CFStub_Construct(LPRPCSTUBBUFFER *ppv) {
    CFStub *cfstub;
    cfstub = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(CFStub));
    if (!cfstub)
	return E_OUTOFMEMORY;
    *ppv = (LPRPCSTUBBUFFER)cfstub;
    cfstub->lpvtbl	= &cfstubvt;
    cfstub->ref		= 1;
    return S_OK;
}

/* Since we create proxy buffers and classfactory in a pair, there is
 * no need for 2 separate structs. Just put them in one, but remember
 * the refcount.
 */
typedef struct _CFProxy {
    const IClassFactoryVtbl		*lpvtbl_cf;
    const IRpcProxyBufferVtbl	*lpvtbl_proxy;
    LONG				ref;

    IRpcChannelBuffer			*chanbuf;
    IUnknown *outer_unknown;
} CFProxy;

static HRESULT WINAPI IRpcProxyBufferImpl_QueryInterface(LPRPCPROXYBUFFER iface,REFIID riid,LPVOID *ppv) {
    *ppv = NULL;
    if (IsEqualIID(riid,&IID_IRpcProxyBuffer)||IsEqualIID(riid,&IID_IUnknown)) {
	IRpcProxyBuffer_AddRef(iface);
	*ppv = (LPVOID)iface;
	return S_OK;
    }
    FIXME("(%s), no interface.\n",debugstr_guid(riid));
    return E_NOINTERFACE;
}

static ULONG WINAPI IRpcProxyBufferImpl_AddRef(LPRPCPROXYBUFFER iface) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_proxy,iface);
    return InterlockedIncrement(&This->ref);
}

static ULONG WINAPI IRpcProxyBufferImpl_Release(LPRPCPROXYBUFFER iface) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_proxy,iface);
    ULONG ref = InterlockedDecrement(&This->ref);

    if (!ref) {
        IRpcProxyBuffer_Disconnect(iface);
        HeapFree(GetProcessHeap(),0,This);
    }
    return ref;
}

static HRESULT WINAPI IRpcProxyBufferImpl_Connect(LPRPCPROXYBUFFER iface,IRpcChannelBuffer* pRpcChannelBuffer) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_proxy,iface);

    This->chanbuf = pRpcChannelBuffer;
    IRpcChannelBuffer_AddRef(This->chanbuf);
    return S_OK;
}
static void WINAPI IRpcProxyBufferImpl_Disconnect(LPRPCPROXYBUFFER iface) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_proxy,iface);
    if (This->chanbuf) {
	IRpcChannelBuffer_Release(This->chanbuf);
	This->chanbuf = NULL;
    }
}

static HRESULT WINAPI
CFProxy_QueryInterface(LPCLASSFACTORY iface,REFIID riid, LPVOID *ppv) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_cf,iface);
    if (This->outer_unknown) return IUnknown_QueryInterface(This->outer_unknown, riid, ppv);
    *ppv = NULL;
    if (IsEqualIID(&IID_IClassFactory,riid) || IsEqualIID(&IID_IUnknown,riid)) {
	*ppv = (LPVOID)iface;
	IClassFactory_AddRef(iface);
	return S_OK;
    }
    if (IsEqualIID(riid,&IID_IMarshal)) /* just to avoid debug output */
	return E_NOINTERFACE;
    FIXME("Unhandled interface: %s\n",debugstr_guid(riid));
    return E_NOINTERFACE;
}

static ULONG   WINAPI CFProxy_AddRef(LPCLASSFACTORY iface) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_cf,iface);
    if (This->outer_unknown) return IUnknown_AddRef(This->outer_unknown);
    return InterlockedIncrement(&This->ref);
}

static ULONG   WINAPI CFProxy_Release(LPCLASSFACTORY iface) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_cf,iface);
    if (This->outer_unknown)
        return IUnknown_Release(This->outer_unknown);
    else
        return IRpcProxyBufferImpl_Release((IRpcProxyBuffer *)&This->lpvtbl_proxy);
}

static HRESULT WINAPI CFProxy_CreateInstance(
    LPCLASSFACTORY iface,
    LPUNKNOWN pUnkOuter,/* [in] */
    REFIID riid,	/* [in] */
    LPVOID *ppv		/* [out] */
) {
    ICOM_THIS_MULTI(CFProxy,lpvtbl_cf,iface);
    HRESULT		hres;
    LPSTREAM		pStream;
    HGLOBAL		hGlobal;
    ULONG		srstatus;
    RPCOLEMESSAGE	msg;

    TRACE("(%p,%s,%p)\n",pUnkOuter,debugstr_guid(riid),ppv);

    /* Send CreateInstance to the remote classfactory.
     *
     * Data: Only the 'IID'.
     */
    memset(&msg, 0, sizeof(msg));
    msg.iMethod  = 3;
    msg.cbBuffer = sizeof(*riid);
    hres = IRpcChannelBuffer_GetBuffer(This->chanbuf,&msg,&IID_IClassFactory);
    if (hres) {
	FIXME("IRpcChannelBuffer_GetBuffer failed with %x?\n",hres);
	return hres;
    }
    memcpy(msg.Buffer,riid,sizeof(*riid));
    hres = IRpcChannelBuffer_SendReceive(This->chanbuf,&msg,&srstatus);
    if (hres) {
	FIXME("IRpcChannelBuffer_SendReceive failed with %x?\n",hres);
	IRpcChannelBuffer_FreeBuffer(This->chanbuf,&msg);
	return hres;
    }

    if (!msg.cbBuffer) { /* interface not found on remote */
	IRpcChannelBuffer_FreeBuffer(This->chanbuf,&msg);
	return srstatus;
    }

    /* We got back: [Marshalled Interface data] */
    TRACE("got %d bytes data.\n",msg.cbBuffer);
    hGlobal = GlobalAlloc(GMEM_MOVEABLE|GMEM_NODISCARD|GMEM_SHARE,msg.cbBuffer);
    memcpy(GlobalLock(hGlobal),msg.Buffer,msg.cbBuffer);
    hres = CreateStreamOnHGlobal(hGlobal,TRUE,&pStream);
    if (hres != S_OK) {
	FIXME("CreateStreamOnHGlobal failed with %x\n",hres);
	IRpcChannelBuffer_FreeBuffer(This->chanbuf,&msg);
        GlobalFree(hGlobal);
	return hres;
    }
    hres = IStream_Read(pStream, ppv, sizeof(*ppv), NULL);
    if (hres != S_OK)
        hres = E_FAIL;
    else if (*ppv) {
        hres = CoUnmarshalInterface(
	       pStream,
	       riid,
	       ppv
        );
    }
    IStream_Release(pStream); /* Does GlobalFree hGlobal too. */

    IRpcChannelBuffer_FreeBuffer(This->chanbuf,&msg);

    if (hres) {
	FIXME("CoMarshalInterface failed, %x\n",hres);
	return hres;
    }
    return S_OK;
}

static HRESULT WINAPI CFProxy_LockServer(LPCLASSFACTORY iface,BOOL fLock) {
    /*ICOM_THIS_MULTI(CFProxy,lpvtbl_cf,iface);*/
    FIXME("(%d), stub!\n",fLock);
    /* basically: write BOOL, read empty */
    return S_OK;
}

static const IRpcProxyBufferVtbl pspbvtbl = {
    IRpcProxyBufferImpl_QueryInterface,
    IRpcProxyBufferImpl_AddRef,
    IRpcProxyBufferImpl_Release,
    IRpcProxyBufferImpl_Connect,
    IRpcProxyBufferImpl_Disconnect
};
static const IClassFactoryVtbl cfproxyvt = {
    CFProxy_QueryInterface,
    CFProxy_AddRef,
    CFProxy_Release,
    CFProxy_CreateInstance,
    CFProxy_LockServer
};

static HRESULT
CFProxy_Construct(IUnknown *pUnkOuter, LPVOID *ppv,LPVOID *ppProxy) {
    CFProxy *cf;

    cf = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(CFProxy));
    if (!cf)
	return E_OUTOFMEMORY;

    cf->lpvtbl_cf	= &cfproxyvt;
    cf->lpvtbl_proxy	= &pspbvtbl;
    /* one reference for the proxy buffer */
    cf->ref		= 1;
    cf->outer_unknown = pUnkOuter;
    *ppv		= &(cf->lpvtbl_cf);
    *ppProxy		= &(cf->lpvtbl_proxy);
    /* and one reference for the object */
    IUnknown_AddRef((IUnknown *)*ppv);
    return S_OK;
}


/********************* IRemUnknown Proxy/Stub ********************************/

typedef struct
{
    const IRpcStubBufferVtbl *lpVtbl;
    LONG refs;
    IRemUnknown *iface;
} RemUnkStub;

static HRESULT WINAPI RemUnkStub_QueryInterface(LPRPCSTUBBUFFER iface,
					     REFIID riid,
					     LPVOID *obj)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(riid),obj);
  if (IsEqualGUID(&IID_IUnknown,riid) ||
      IsEqualGUID(&IID_IRpcStubBuffer,riid)) {
    *obj = This;
    return S_OK;
  }
  return E_NOINTERFACE;
}

static ULONG WINAPI RemUnkStub_AddRef(LPRPCSTUBBUFFER iface)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  TRACE("(%p)->AddRef()\n",This);
  return InterlockedIncrement(&This->refs);
}

static ULONG WINAPI RemUnkStub_Release(LPRPCSTUBBUFFER iface)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  ULONG refs;
  TRACE("(%p)->Release()\n",This);
  refs = InterlockedDecrement(&This->refs);
  if (!refs)
  {
    IRpcStubBuffer_Disconnect(iface);
    HeapFree(GetProcessHeap(), 0, This);
  }
  return refs;
}

static HRESULT WINAPI RemUnkStub_Connect(LPRPCSTUBBUFFER iface,
				      LPUNKNOWN lpUnkServer)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  TRACE("(%p)->Connect(%p)\n",This,lpUnkServer);
  This->iface = (IRemUnknown*)lpUnkServer;
  IRemUnknown_AddRef(This->iface);
  return S_OK;
}

static void WINAPI RemUnkStub_Disconnect(LPRPCSTUBBUFFER iface)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  TRACE("(%p)->Disconnect()\n",This);
  IUnknown_Release(This->iface);
  This->iface = NULL;
}

static HRESULT WINAPI RemUnkStub_Invoke(LPRPCSTUBBUFFER iface,
				     PRPCOLEMESSAGE pMsg,
				     LPRPCCHANNELBUFFER pChannel)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  ULONG iMethod = pMsg->iMethod;
  LPBYTE buf = pMsg->Buffer;
  HRESULT hr = RPC_E_INVALIDMETHOD;

  TRACE("(%p)->Invoke(%p,%p) method %d\n", This, pMsg, pChannel, iMethod);
  switch (iMethod)
  {
  case 3: /* RemQueryInterface */
  {
    IPID ipid;
    ULONG cRefs;
    USHORT cIids;
    IID *iids;
    REMQIRESULT *pQIResults = NULL;

    /* in */
    memcpy(&ipid, buf, sizeof(ipid));
    buf += sizeof(ipid);
    memcpy(&cRefs, buf, sizeof(cRefs));
    buf += sizeof(cRefs);
    memcpy(&cIids, buf, sizeof(cIids));
    buf += sizeof(cIids);
    iids = (IID *)buf;

    hr = IRemUnknown_RemQueryInterface(This->iface, &ipid, cRefs, cIids, iids, &pQIResults);

    /* out */
    pMsg->cbBuffer = cIids * sizeof(REMQIRESULT) + sizeof(HRESULT);

    IRpcChannelBuffer_GetBuffer(pChannel, pMsg, &IID_IRemUnknown);

    buf = pMsg->Buffer;
    *(HRESULT *)buf = hr;
    buf += sizeof(HRESULT);
    
    if (hr == S_OK)
      /* FIXME: pQIResults is a unique pointer so pQIResults can be NULL! */
      memcpy(buf, pQIResults, cIids * sizeof(REMQIRESULT));

    CoTaskMemFree(pQIResults);

    break;
  }
  case 4: /* RemAddRef */
  {
    USHORT cIids;
    REMINTERFACEREF *ir;
    HRESULT *pResults;

    /* in */
    memcpy(&cIids, buf, sizeof(USHORT));
    buf += sizeof(USHORT);
    ir = (REMINTERFACEREF*)buf;
    pResults = CoTaskMemAlloc(cIids * sizeof(HRESULT));
    if (!pResults) return E_OUTOFMEMORY;

    hr = IRemUnknown_RemAddRef(This->iface, cIids, ir, pResults);

    /* out */
    pMsg->cbBuffer = cIids * sizeof(HRESULT);

    IRpcChannelBuffer_GetBuffer(pChannel, pMsg, &IID_IRemUnknown);
    if (!hr)
    {
        buf = pMsg->Buffer;
        memcpy(buf, pResults, cIids * sizeof(HRESULT));
    }

    CoTaskMemFree(pResults);

    break;
  }
  case 5: /* RemRelease */
  {
    USHORT cIids;
    REMINTERFACEREF *ir;

    /* in */
    memcpy(&cIids, buf, sizeof(USHORT));
    buf += sizeof(USHORT);
    ir = (REMINTERFACEREF*)buf;

    hr = IRemUnknown_RemRelease(This->iface, cIids, ir);

    /* out */
    pMsg->cbBuffer = 0;
    IRpcChannelBuffer_GetBuffer(pChannel, pMsg, &IID_IRemUnknown);
    break;
  }
  }
  return hr;
}

static LPRPCSTUBBUFFER WINAPI RemUnkStub_IsIIDSupported(LPRPCSTUBBUFFER iface,
						     REFIID riid)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  TRACE("(%p)->IsIIDSupported(%s)\n", This, debugstr_guid(riid));
  return IsEqualGUID(&IID_IRemUnknown, riid) ? iface : NULL;
}

static ULONG WINAPI RemUnkStub_CountRefs(LPRPCSTUBBUFFER iface)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  FIXME("(%p)->CountRefs()\n", This);
  return 1;
}

static HRESULT WINAPI RemUnkStub_DebugServerQueryInterface(LPRPCSTUBBUFFER iface,
							LPVOID *ppv)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  FIXME("(%p)->DebugServerQueryInterface(%p)\n",This,ppv);
  return E_NOINTERFACE;
}

static void WINAPI RemUnkStub_DebugServerRelease(LPRPCSTUBBUFFER iface,
					      LPVOID pv)
{
  RemUnkStub *This = (RemUnkStub *)iface;
  FIXME("(%p)->DebugServerRelease(%p)\n", This, pv);
}

static const IRpcStubBufferVtbl RemUnkStub_VTable =
{
  RemUnkStub_QueryInterface,
  RemUnkStub_AddRef,
  RemUnkStub_Release,
  RemUnkStub_Connect,
  RemUnkStub_Disconnect,
  RemUnkStub_Invoke,
  RemUnkStub_IsIIDSupported,
  RemUnkStub_CountRefs,
  RemUnkStub_DebugServerQueryInterface,
  RemUnkStub_DebugServerRelease
};

static HRESULT RemUnkStub_Construct(IRpcStubBuffer **ppStub)
{
    RemUnkStub *This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
    if (!This) return E_OUTOFMEMORY;
    This->lpVtbl = &RemUnkStub_VTable;
    This->refs = 1;
    This->iface = NULL;
    *ppStub = (IRpcStubBuffer*)This;
    return S_OK;
}


typedef struct _RemUnkProxy {
    const IRemUnknownVtbl		*lpvtbl_remunk;
    const IRpcProxyBufferVtbl	*lpvtbl_proxy;
    LONG				refs;

    IRpcChannelBuffer			*chan;
    IUnknown *outer_unknown;
} RemUnkProxy;

static HRESULT WINAPI RemUnkProxy_QueryInterface(LPREMUNKNOWN iface, REFIID riid, void **ppv)
{
    RemUnkProxy *This = (RemUnkProxy *)iface;
    if (This->outer_unknown)
        return IUnknown_QueryInterface(This->outer_unknown, riid, ppv);
    if (IsEqualIID(riid, &IID_IUnknown) ||
        IsEqualIID(riid, &IID_IRemUnknown))
    {
        IRemUnknown_AddRef(iface);
        *ppv = (LPVOID)iface;
        return S_OK;
    }
    return E_NOINTERFACE;
}

static ULONG WINAPI RemUnkProxy_AddRef(LPREMUNKNOWN iface)
{
  RemUnkProxy *This = (RemUnkProxy *)iface;
  ULONG refs;

  TRACE("(%p)->AddRef()\n",This);

  if (This->outer_unknown)
      refs = IUnknown_AddRef(This->outer_unknown);
  else
      refs = InterlockedIncrement(&This->refs);
  return refs;
}

static ULONG WINAPI RemUnkProxy_Release(LPREMUNKNOWN iface)
{
  RemUnkProxy *This = (RemUnkProxy *)iface;

  TRACE("(%p)->Release()\n",This);
  if (This->outer_unknown)
      return IUnknown_Release(This->outer_unknown);
  else
      return IRpcProxyBufferImpl_Release((IRpcProxyBuffer *)&This->lpvtbl_proxy);
}

static HRESULT WINAPI RemUnkProxy_RemQueryInterface(LPREMUNKNOWN iface,
						 REFIPID ripid,
						 ULONG cRefs,
						 USHORT cIids,
						 IID* iids,
						 REMQIRESULT** ppQIResults)
{
  RemUnkProxy *This = (RemUnkProxy *)iface;
  RPCOLEMESSAGE msg;
  HRESULT hr = S_OK;
  ULONG status;

  TRACE("(%p)->(%s,%d,%d,%p,%p)\n",This,
	debugstr_guid(ripid),cRefs,cIids,iids,ppQIResults);

  *ppQIResults = NULL;
  memset(&msg, 0, sizeof(msg));
  msg.iMethod = 3;
  msg.cbBuffer = sizeof(IPID) + sizeof(ULONG) +
    sizeof(USHORT) + cIids*sizeof(IID);
  hr = IRpcChannelBuffer_GetBuffer(This->chan, &msg, &IID_IRemUnknown);
  if (SUCCEEDED(hr)) {
    LPBYTE buf = msg.Buffer;
    memcpy(buf, ripid, sizeof(IPID));
    buf += sizeof(IPID);
    memcpy(buf, &cRefs, sizeof(ULONG));
    buf += sizeof(ULONG);
    memcpy(buf, &cIids, sizeof(USHORT));
    buf += sizeof(USHORT);
    memcpy(buf, iids, cIids*sizeof(IID));

    hr = IRpcChannelBuffer_SendReceive(This->chan, &msg, &status);

    buf = msg.Buffer;

    if (SUCCEEDED(hr)) {
        hr = *(HRESULT *)buf;
        buf += sizeof(HRESULT);
    }

    if (SUCCEEDED(hr)) {
      *ppQIResults = CoTaskMemAlloc(cIids*sizeof(REMQIRESULT));
      memcpy(*ppQIResults, buf, cIids*sizeof(REMQIRESULT));
    }

    IRpcChannelBuffer_FreeBuffer(This->chan, &msg);
  }

  return hr;
}

static HRESULT WINAPI RemUnkProxy_RemAddRef(LPREMUNKNOWN iface,
					 USHORT cInterfaceRefs,
					 REMINTERFACEREF* InterfaceRefs,
					 HRESULT* pResults)
{
  RemUnkProxy *This = (RemUnkProxy *)iface;
  RPCOLEMESSAGE msg;
  HRESULT hr = S_OK;
  ULONG status;

  TRACE("(%p)->(%d,%p,%p)\n",This,
	cInterfaceRefs,InterfaceRefs,pResults);

  memset(&msg, 0, sizeof(msg));
  msg.iMethod = 4;
  msg.cbBuffer = sizeof(USHORT) + cInterfaceRefs*sizeof(REMINTERFACEREF);
  hr = IRpcChannelBuffer_GetBuffer(This->chan, &msg, &IID_IRemUnknown);
  if (SUCCEEDED(hr)) {
    LPBYTE buf = msg.Buffer;
    memcpy(buf, &cInterfaceRefs, sizeof(USHORT));
    buf += sizeof(USHORT);
    memcpy(buf, InterfaceRefs, cInterfaceRefs*sizeof(REMINTERFACEREF));

    hr = IRpcChannelBuffer_SendReceive(This->chan, &msg, &status);

    if (SUCCEEDED(hr)) {
      buf = msg.Buffer;
      memcpy(pResults, buf, cInterfaceRefs*sizeof(HRESULT));
    }

    IRpcChannelBuffer_FreeBuffer(This->chan, &msg);
  }

  return hr;
}

static HRESULT WINAPI RemUnkProxy_RemRelease(LPREMUNKNOWN iface,
					  USHORT cInterfaceRefs,
					  REMINTERFACEREF* InterfaceRefs)
{
  RemUnkProxy *This = (RemUnkProxy *)iface;
  RPCOLEMESSAGE msg;
  HRESULT hr = S_OK;
  ULONG status;

  TRACE("(%p)->(%d,%p)\n",This,
	cInterfaceRefs,InterfaceRefs);

  memset(&msg, 0, sizeof(msg));
  msg.iMethod = 5;
  msg.cbBuffer = sizeof(USHORT) + cInterfaceRefs*sizeof(REMINTERFACEREF);
  hr = IRpcChannelBuffer_GetBuffer(This->chan, &msg, &IID_IRemUnknown);
  if (SUCCEEDED(hr)) {
    LPBYTE buf = msg.Buffer;
    memcpy(buf, &cInterfaceRefs, sizeof(USHORT));
    buf += sizeof(USHORT);
    memcpy(buf, InterfaceRefs, cInterfaceRefs*sizeof(REMINTERFACEREF));

    hr = IRpcChannelBuffer_SendReceive(This->chan, &msg, &status);

    IRpcChannelBuffer_FreeBuffer(This->chan, &msg);
  }

  return hr;
}

static const IRemUnknownVtbl RemUnkProxy_VTable =
{
  RemUnkProxy_QueryInterface,
  RemUnkProxy_AddRef,
  RemUnkProxy_Release,
  RemUnkProxy_RemQueryInterface,
  RemUnkProxy_RemAddRef,
  RemUnkProxy_RemRelease
};


static HRESULT WINAPI RURpcProxyBufferImpl_QueryInterface(LPRPCPROXYBUFFER iface,REFIID riid,LPVOID *ppv) {
    *ppv = NULL;
    if (IsEqualIID(riid,&IID_IRpcProxyBuffer)||IsEqualIID(riid,&IID_IUnknown)) {
	IRpcProxyBuffer_AddRef(iface);
	*ppv = (LPVOID)iface;
	return S_OK;
    }
    FIXME("(%s), no interface.\n",debugstr_guid(riid));
    return E_NOINTERFACE;
}

static ULONG WINAPI RURpcProxyBufferImpl_AddRef(LPRPCPROXYBUFFER iface) {
    ICOM_THIS_MULTI(RemUnkProxy,lpvtbl_proxy,iface);
    TRACE("%p, %d\n", iface, This->refs + 1);
    return InterlockedIncrement(&This->refs);
}

static ULONG WINAPI RURpcProxyBufferImpl_Release(LPRPCPROXYBUFFER iface) {
    ICOM_THIS_MULTI(RemUnkProxy,lpvtbl_proxy,iface);
    ULONG ref = InterlockedDecrement(&This->refs);
    TRACE("%p, %d\n", iface, ref);
    if (!ref) {
        IRpcProxyBuffer_Disconnect(iface);
        HeapFree(GetProcessHeap(),0,This);
    }
    return ref;
}

static HRESULT WINAPI RURpcProxyBufferImpl_Connect(LPRPCPROXYBUFFER iface,IRpcChannelBuffer* pRpcChannelBuffer) {
    ICOM_THIS_MULTI(RemUnkProxy,lpvtbl_proxy,iface);

    TRACE("%p, %p\n", iface, pRpcChannelBuffer);
    This->chan = pRpcChannelBuffer;
    IRpcChannelBuffer_AddRef(This->chan);
    return S_OK;
}
static void WINAPI RURpcProxyBufferImpl_Disconnect(LPRPCPROXYBUFFER iface) {
    ICOM_THIS_MULTI(RemUnkProxy,lpvtbl_proxy,iface);
    TRACE("%p, %p\n", iface, This->chan);
    if (This->chan) {
	IRpcChannelBuffer_Release(This->chan);
	This->chan = NULL;
    }
}


static const IRpcProxyBufferVtbl RURpcProxyBuffer_VTable = {
    RURpcProxyBufferImpl_QueryInterface,
    RURpcProxyBufferImpl_AddRef,
    RURpcProxyBufferImpl_Release,
    RURpcProxyBufferImpl_Connect,
    RURpcProxyBufferImpl_Disconnect
};

static HRESULT
RemUnkProxy_Construct(IUnknown *pUnkOuter, LPVOID *ppv,LPVOID *ppProxy) {
    RemUnkProxy *This;

    This = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(*This));
    if (!This)
	return E_OUTOFMEMORY;

    This->lpvtbl_remunk	= &RemUnkProxy_VTable;
    This->lpvtbl_proxy	= &RURpcProxyBuffer_VTable;
    /* only one reference for the proxy buffer */
    This->refs		= 1;
    This->outer_unknown = pUnkOuter;
    *ppv		= &(This->lpvtbl_remunk);
    *ppProxy		= &(This->lpvtbl_proxy);
    /* and one reference for the object */
    IUnknown_AddRef((IUnknown *)*ppv);
    return S_OK;
}


/********************* OLE Proxy/Stub Factory ********************************/
static HRESULT WINAPI
PSFacBuf_QueryInterface(LPPSFACTORYBUFFER iface, REFIID iid, LPVOID *ppv) {
    if (IsEqualIID(iid,&IID_IPSFactoryBuffer)||IsEqualIID(iid,&IID_IUnknown)) {
	*ppv = (LPVOID)iface;
	/* No ref counting, static class */
	return S_OK;
    }
    FIXME("(%s) unknown IID?\n",debugstr_guid(iid));
    return E_NOINTERFACE;
}

static ULONG WINAPI PSFacBuf_AddRef(LPPSFACTORYBUFFER iface) { return 2; }
static ULONG WINAPI PSFacBuf_Release(LPPSFACTORYBUFFER iface) { return 1; }

static HRESULT WINAPI
PSFacBuf_CreateProxy(
    LPPSFACTORYBUFFER iface, IUnknown* pUnkOuter, REFIID riid,
    IRpcProxyBuffer **ppProxy, LPVOID *ppv
) {
    if (IsEqualIID(&IID_IClassFactory,riid))
	return CFProxy_Construct(pUnkOuter, ppv,(LPVOID*)ppProxy);
    else if (IsEqualIID(&IID_IRemUnknown,riid))
	return RemUnkProxy_Construct(pUnkOuter, ppv,(LPVOID*)ppProxy);
    FIXME("proxying not implemented for (%s) yet!\n",debugstr_guid(riid));
    return E_FAIL;
}

static HRESULT WINAPI
PSFacBuf_CreateStub(
    LPPSFACTORYBUFFER iface, REFIID riid,IUnknown *pUnkServer,
    IRpcStubBuffer** ppStub
) {
    HRESULT hres;

    TRACE("(%s,%p,%p)\n",debugstr_guid(riid),pUnkServer,ppStub);

    if (IsEqualIID(&IID_IClassFactory, riid) ||
        IsEqualIID(&IID_IUnknown, riid) /* FIXME: fixup stub manager and remove this*/) {
	hres = CFStub_Construct(ppStub);
	if (!hres)
	    IRpcStubBuffer_Connect((*ppStub),pUnkServer);
	return hres;
    } else if (IsEqualIID(&IID_IRemUnknown,riid)) {
	hres = RemUnkStub_Construct(ppStub);
	if (!hres)
	    IRpcStubBuffer_Connect((*ppStub),pUnkServer);
	return hres;
    }
    FIXME("stubbing not implemented for (%s) yet!\n",debugstr_guid(riid));
    return E_FAIL;
}

static const IPSFactoryBufferVtbl psfacbufvtbl = {
    PSFacBuf_QueryInterface,
    PSFacBuf_AddRef,
    PSFacBuf_Release,
    PSFacBuf_CreateProxy,
    PSFacBuf_CreateStub
};

/* This is the whole PSFactoryBuffer object, just the vtableptr */
static const IPSFactoryBufferVtbl *lppsfac = &psfacbufvtbl;

/***********************************************************************
 *           DllGetClassObject [OLE32.@]
 */
HRESULT WINAPI DllGetClassObject(REFCLSID rclsid, REFIID iid,LPVOID *ppv)
{
    *ppv = NULL;
    if (IsEqualIID(rclsid, &CLSID_PSFactoryBuffer))
        return IPSFactoryBuffer_QueryInterface((IPSFactoryBuffer *)&lppsfac, iid, ppv);
    if (IsEqualIID(rclsid,&CLSID_DfMarshal)&&(
		IsEqualIID(iid,&IID_IClassFactory) ||
		IsEqualIID(iid,&IID_IUnknown)
	)
    )
	return MARSHAL_GetStandardMarshalCF(ppv);
    if (IsEqualIID(rclsid,&CLSID_StdGlobalInterfaceTable) && (IsEqualIID(iid,&IID_IClassFactory) || IsEqualIID(iid,&IID_IUnknown)))
        return StdGlobalInterfaceTable_GetFactory(ppv);
    if (IsEqualCLSID(rclsid, &CLSID_FileMoniker))
        return FileMonikerCF_Create(iid, ppv);
    if (IsEqualCLSID(rclsid, &CLSID_ItemMoniker))
        return ItemMonikerCF_Create(iid, ppv);
    if (IsEqualCLSID(rclsid, &CLSID_AntiMoniker))
        return AntiMonikerCF_Create(iid, ppv);
    if (IsEqualCLSID(rclsid, &CLSID_CompositeMoniker))
        return CompositeMonikerCF_Create(iid, ppv);
    if (IsEqualCLSID(rclsid, &CLSID_ClassMoniker))
        return ClassMonikerCF_Create(iid, ppv);
    if (IsEqualCLSID(rclsid, &CLSID_PointerMoniker))
        return PointerMonikerCF_Create(iid, ppv);

    FIXME("\n\tCLSID:\t%s,\n\tIID:\t%s\n",debugstr_guid(rclsid),debugstr_guid(iid));
    return CLASS_E_CLASSNOTAVAILABLE;
}
