rpc.c

winNT技术操作系统,国外开放的原代码和LIUX一样

static void __RPC_STUB dispatch_rpc(RPC_MESSAGE *msg)
{
    struct dispatch_params *params;
    IRpcStubBuffer     *stub;
    APARTMENT          *apt;
    IPID                ipid;

    RpcBindingInqObject(msg->Handle, &ipid);

    TRACE("ipid = %s, iMethod = %d\n", debugstr_guid(&ipid), msg->ProcNum);

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

    stub = ipid_to_apt_and_stubbuffer(&ipid, &apt);
    if (!apt || !stub)
    {
        if (apt) apartment_release(apt);
        ERR("no apartment found for ipid %s\n", debugstr_guid(&ipid));
        return RpcRaiseException(RPC_E_DISCONNECTED);
    }

    params->msg = (RPCOLEMESSAGE *)msg;
    params->stub = stub;
    params->chan = NULL; /* FIXME: pass server channel */
    params->status = RPC_S_OK;

    /* Note: this is the important difference between STAs and MTAs - we
     * always execute RPCs to STAs in the thread that originally created the
     * apartment (i.e. the one that pumps messages to the window) */
    if (apt->model & COINIT_APARTMENTTHREADED)
    {
        params->handle = CreateEventW(NULL, FALSE, FALSE, NULL);

        TRACE("Calling apartment thread 0x%08lx...\n", apt->tid);

        PostMessageW(apt->win, DM_EXECUTERPC, 0, (LPARAM)params);
        WaitForSingleObject(params->handle, INFINITE);
        CloseHandle(params->handle);
    }
    else
        RPC_ExecuteCall(params);

    HeapFree(GetProcessHeap(), 0, params);

    apartment_release(apt);
}

/* stub registration */
HRESULT RPC_RegisterInterface(REFIID riid)
{
    struct registered_if *rif;
    BOOL found = FALSE;
    HRESULT hr = S_OK;
    
    TRACE("(%s)\n", debugstr_guid(riid));

    EnterCriticalSection(&csRegIf);
    LIST_FOR_EACH_ENTRY(rif, &registered_interfaces, struct registered_if, entry)
    {
        if (IsEqualGUID(&rif->If.InterfaceId.SyntaxGUID, riid))
        {
            rif->refs++;
            found = TRUE;
            break;
        }
    }
    if (!found)
    {
        TRACE("Creating new interface\n");

        rif = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*rif));
        if (rif)
        {
            RPC_STATUS status;

            rif->refs = 1;
            rif->If.Length = sizeof(RPC_SERVER_INTERFACE);
            /* RPC interface ID = COM interface ID */
            rif->If.InterfaceId.SyntaxGUID = *riid;
            rif->If.DispatchTable = &rpc_dispatch;
            /* all other fields are 0, including the version asCOM objects
             * always have a version of 0.0 */
            status = RpcServerRegisterIfEx(
                (RPC_IF_HANDLE)&rif->If,
                NULL, NULL,
                RPC_IF_OLE | RPC_IF_AUTOLISTEN,
                RPC_C_LISTEN_MAX_CALLS_DEFAULT,
                NULL);
            if (status == RPC_S_OK)
                list_add_tail(&registered_interfaces, &rif->entry);
            else
            {
                ERR("RpcServerRegisterIfEx failed with error %ld\n", status);
                HeapFree(GetProcessHeap(), 0, rif);
                hr = HRESULT_FROM_WIN32(status);
            }
        }
        else
            hr = E_OUTOFMEMORY;
    }
    LeaveCriticalSection(&csRegIf);
    return hr;
}

/* stub unregistration */
void RPC_UnregisterInterface(REFIID riid)
{
    struct registered_if *rif;
    EnterCriticalSection(&csRegIf);
    LIST_FOR_EACH_ENTRY(rif, &registered_interfaces, struct registered_if, entry)
    {
        if (IsEqualGUID(&rif->If.InterfaceId.SyntaxGUID, riid))
        {
            if (!--rif->refs)
            {
#if 0 /* this is a stub in builtin and spams the console with FIXME's */
                IID iid = *riid; /* RpcServerUnregisterIf doesn't take const IID */
                RpcServerUnregisterIf((RPC_IF_HANDLE)&rif->If, &iid, 0);
                list_remove(&rif->entry);
                HeapFree(GetProcessHeap(), 0, rif);
#endif
            }
            break;
        }
    }
    LeaveCriticalSection(&csRegIf);
}

/* make the apartment reachable by other threads and processes and create the
 * IRemUnknown object */
void RPC_StartRemoting(struct apartment *apt)
{
    if (!InterlockedExchange(&apt->remoting_started, TRUE))
    {
        WCHAR endpoint[200];
        RPC_STATUS status;

        get_rpc_endpoint(endpoint, &apt->oxid);
    
        status = RpcServerUseProtseqEpW(
            wszPipeTransport,
            RPC_C_PROTSEQ_MAX_REQS_DEFAULT,
            endpoint,
            NULL);
        if (status != RPC_S_OK)
            ERR("Couldn't register endpoint %s\n", debugstr_w(endpoint));

        /* FIXME: move remote unknown exporting into this function */
    }
    start_apartment_remote_unknown();
}


static HRESULT create_server(REFCLSID rclsid)
{
    static const WCHAR  wszLocalServer32[] = { 'L','o','c','a','l','S','e','r','v','e','r','3','2',0 };
    static const WCHAR  embedding[] = { ' ', '-','E','m','b','e','d','d','i','n','g',0 };
    HKEY                key;
    HRESULT             hres;
    WCHAR               command[MAX_PATH+sizeof(embedding)/sizeof(WCHAR)];
    DWORD               size = (MAX_PATH+1) * sizeof(WCHAR);
    STARTUPINFOW        sinfo;
    PROCESS_INFORMATION pinfo;

    hres = COM_OpenKeyForCLSID(rclsid, wszLocalServer32, KEY_READ, &key);
    if (FAILED(hres)) {
        ERR("class %s not registered\n", debugstr_guid(rclsid));
        return hres;
    }

    hres = RegQueryValueExW(key, NULL, NULL, NULL, (LPBYTE)command, &size);
    RegCloseKey(key);
    if (hres) {
        WARN("No default value for LocalServer32 key\n");
        return REGDB_E_CLASSNOTREG; /* FIXME: check retval */
    }

    memset(&sinfo,0,sizeof(sinfo));
    sinfo.cb = sizeof(sinfo);

    /* EXE servers are started with the -Embedding switch. */

    strcatW(command, embedding);

    TRACE("activating local server %s for %s\n", debugstr_w(command), debugstr_guid(rclsid));

    /* FIXME: Win2003 supports a ServerExecutable value that is passed into
     * CreateProcess */
    if (!CreateProcessW(NULL, command, NULL, NULL, FALSE, 0, NULL, NULL, &sinfo, &pinfo)) {
        WARN("failed to run local server %s\n", debugstr_w(command));
        return HRESULT_FROM_WIN32(GetLastError());
    }
    CloseHandle(pinfo.hProcess);
    CloseHandle(pinfo.hThread);

    return S_OK;
}

/*
 * start_local_service()  - start a service given its name and parameters
 */
static DWORD start_local_service(LPCWSTR name, DWORD num, LPWSTR *params)
{
    SC_HANDLE handle, hsvc;
    DWORD     r = ERROR_FUNCTION_FAILED;

    TRACE("Starting service %s %ld params\n", debugstr_w(name), num);

    handle = OpenSCManagerW(NULL, NULL, SC_MANAGER_ALL_ACCESS);
    if (!handle)
        return r;
    hsvc = OpenServiceW(handle, name, SC_MANAGER_ALL_ACCESS);
    if (hsvc)
    {
        if(StartServiceW(hsvc, num, (LPCWSTR*)params))
            r = ERROR_SUCCESS;
        else
            r = GetLastError();
        if (r == ERROR_SERVICE_ALREADY_RUNNING)
            r = ERROR_SUCCESS;
        CloseServiceHandle(hsvc);
    }
    CloseServiceHandle(handle);

    TRACE("StartService returned error %ld (%s)\n", r, r?"ok":"failed");

    return r;
}

/*
 * create_local_service()  - start a COM server in a service
 *
 *   To start a Local Service, we read the AppID value under
 * the class's CLSID key, then open the HKCR\\AppId key specified
 * there and check for a LocalService value.
 *
 * Note:  Local Services are not supported under Windows 9x
 */
static HRESULT create_local_service(REFCLSID rclsid)
{
    HRESULT hres;
    WCHAR buf[CHARS_IN_GUID], keyname[50];
    static const WCHAR szAppId[] = { 'A','p','p','I','d',0 };
    static const WCHAR szAppIdKey[] = { 'A','p','p','I','d','\\',0 };
    static const WCHAR szLocalService[] = { 'L','o','c','a','l','S','e','r','v','i','c','e',0 };
    static const WCHAR szServiceParams[] = {'S','e','r','v','i','c','e','P','a','r','a','m','s',0};
    HKEY hkey;
    LONG r;
    DWORD type, sz;

    TRACE("Attempting to start Local service for %s\n", debugstr_guid(rclsid));

    /* read the AppID value under the class's key */
    hres = COM_OpenKeyForCLSID(rclsid, szAppId, KEY_READ, &hkey);
    if (FAILED(hres))
        return hres;
    sz = sizeof buf;
    r = RegQueryValueExW(hkey, NULL, NULL, &type, (LPBYTE)buf, &sz);
    RegCloseKey(hkey);
    if (r!=ERROR_SUCCESS || type!=REG_SZ)
        return hres;

    /* read the LocalService and ServiceParameters values from the AppID key */
    strcpyW(keyname, szAppIdKey);
    strcatW(keyname, buf);
    r = RegOpenKeyExW(HKEY_CLASSES_ROOT, keyname, 0, KEY_READ, &hkey);
    if (r!=ERROR_SUCCESS)
        return hres;
    sz = sizeof buf;
    r = RegQueryValueExW(hkey, szLocalService, NULL, &type, (LPBYTE)buf, &sz);
    if (r==ERROR_SUCCESS && type==REG_SZ)
    {
        DWORD num_args = 0;
        LPWSTR args[1] = { NULL };

        /*
         * FIXME: I'm not really sure how to deal with the service parameters.
         *        I suspect that the string returned from RegQueryValueExW
         *        should be split into a number of arguments by spaces.
         *        It would make more sense if ServiceParams contained a
         *        REG_MULTI_SZ here, but it's a REG_SZ for the services
         *        that I'm interested in for the moment.
         */
        r = RegQueryValueExW(hkey, szServiceParams, NULL, &type, NULL, &sz);
        if (r == ERROR_SUCCESS && type == REG_SZ && sz)
        {
            args[0] = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sz);
            num_args++;
            RegQueryValueExW(hkey, szServiceParams, NULL, &type, (LPBYTE)args[0], &sz);
        }
        r = start_local_service(buf, num_args, args);
        if (r==ERROR_SUCCESS)
            hres = S_OK;
        HeapFree(GetProcessHeap(),0,args[0]);
    }
    RegCloseKey(hkey);
        
    return hres;
}


static void get_localserver_pipe_name(WCHAR *pipefn, REFCLSID rclsid)
{
    static const WCHAR wszPipeRef[] = {'\\','\\','.','\\','p','i','p','e','\\',0};
    strcpyW(pipefn, wszPipeRef);
    StringFromGUID2(rclsid, pipefn + sizeof(wszPipeRef)/sizeof(wszPipeRef[0]) - 1, CHARS_IN_GUID);
}

/* FIXME: should call to rpcss instead */
HRESULT RPC_GetLocalClassObject(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
{
    HRESULT        hres;
    HANDLE         hPipe;
    WCHAR          pipefn[100];
    DWORD          res, bufferlen;
    char           marshalbuffer[200];
    IStream       *pStm;
    LARGE_INTEGER  seekto;
    ULARGE_INTEGER newpos;
    int            tries = 0;

    static const int MAXTRIES = 30; /* 30 seconds */

    TRACE("rclsid=%s, iid=%s\n", debugstr_guid(rclsid), debugstr_guid(iid));

    get_localserver_pipe_name(pipefn, rclsid);

    while (tries++ < MAXTRIES) {
        TRACE("waiting for %s\n", debugstr_w(pipefn));
      
        WaitNamedPipeW( pipefn, NMPWAIT_WAIT_FOREVER );
        hPipe = CreateFileW(pipefn, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0);
        if (hPipe == INVALID_HANDLE_VALUE) {
            if (tries == 1) {
                if ( (hres = create_server(rclsid)) &&
                     (hres = create_local_service(rclsid)) )
                    return hres;
                Sleep(1000);
            } else {
                WARN("Connecting to %s, no response yet, retrying: le is %lx\n", debugstr_w(pipefn), GetLastError());
                Sleep(1000);
            }
            continue;
        }
        bufferlen = 0;
        if (!ReadFile(hPipe,marshalbuffer,sizeof(marshalbuffer),&bufferlen,NULL)) {
            FIXME("Failed to read marshal id from classfactory of %s.\n",debugstr_guid(rclsid));
            Sleep(1000);
            continue;
        }
        TRACE("read marshal id from pipe\n");
        CloseHandle(hPipe);
        break;
    }
    
    if (tries >= MAXTRIES)
        return E_NOINTERFACE;
    
    hres = CreateStreamOnHGlobal(0,TRUE,&pStm);
    if (hres) return hres;
    hres = IStream_Write(pStm,marshalbuffer,bufferlen,&res);
    if (hres) goto out;
    seekto.u.LowPart = 0;seekto.u.HighPart = 0;
    hres = IStream_Seek(pStm,seekto,SEEK_SET,&newpos);
    
    TRACE("unmarshalling classfactory\n");
    hres = CoUnmarshalInterface(pStm,&IID_IClassFactory,ppv);
out:
    IStream_Release(pStm);
    return hres;
}


struct local_server_params
{
    CLSID clsid;
    IStream *stream;
};

/* FIXME: should call to rpcss instead */
static DWORD WINAPI local_server_thread(LPVOID param)
{
    struct local_server_params * lsp = (struct local_server_params *)param;
    HANDLE		hPipe;
    WCHAR 		pipefn[100];
    HRESULT		hres;
    IStream		*pStm = lsp->stream;
    STATSTG		ststg;
    unsigned char	*buffer;
    int 		buflen;
    LARGE_INTEGER	seekto;
    ULARGE_INTEGER	newpos;
    ULONG		res;

    TRACE("Starting threader for %s.\n",debugstr_guid(&lsp->clsid));

    get_localserver_pipe_name(pipefn, &lsp->clsid);

    HeapFree(GetProcessHeap(), 0, lsp);

    hPipe = CreateNamedPipeW( pipefn, PIPE_ACCESS_DUPLEX,
                              PIPE_TYPE_BYTE|PIPE_WAIT, PIPE_UNLIMITED_INSTANCES,
                              4096, 4096, 500 /* 0.5 second timeout */, NULL );
    
    if (hPipe == INVALID_HANDLE_VALUE)
    {
        FIXME("pipe creation failed for %s, le is %ld\n", debugstr_w(pipefn), GetLastError());
        return 1;
    }
    
    while (1) {
        if (!ConnectNamedPipe(hPipe,NULL)) {
            ERR("Failure during ConnectNamedPipe %ld, ABORT!\n",GetLastError());
            break;
        }

        TRACE("marshalling IClassFactory to client\n");
        
        hres = IStream_Stat(pStm,&ststg,0);
        if (hres) return hres;

        buflen = ststg.cbSize.u.LowPart;
        buffer = HeapAlloc(GetProcessHeap(),0,buflen);
        seekto.u.LowPart = 0;
        seekto.u.HighPart = 0;
        hres = IStream_Seek(pStm,seekto,SEEK_SET,&newpos);
        if (hres) {
            FIXME("IStream_Seek failed, %lx\n",hres);
            return hres;
        }
        
        hres = IStream_Read(pStm,buffer,buflen,&res);
        if (hres) {
            FIXME("Stream Read failed, %lx\n",hres);
            return hres;
        }
        
        WriteFile(hPipe,buffer,buflen,&res,NULL);
        FlushFileBuffers(hPipe);
        DisconnectNamedPipe(hPipe);

        TRACE("done marshalling IClassFactory\n");
    }
    CloseHandle(hPipe);
    IStream_Release(pStm);
    return 0;
}

void RPC_StartLocalServer(REFCLSID clsid, IStream *stream)
{
    DWORD tid;
    HANDLE thread;
    struct local_server_params *lsp = HeapAlloc(GetProcessHeap(), 0, sizeof(*lsp));

    lsp->clsid = *clsid;
    lsp->stream = stream;

    thread = CreateThread(NULL, 0, local_server_thread, lsp, 0, &tid);
    CloseHandle(thread);
    /* FIXME: failure handling */
}