system/wine
system/wine
1
0
Fork 0
mirror of git://source.winehq.org/git/wine.git synced 2024-11-05 18:01:34 +00:00
Code Issues Projects Releases Packages Wiki Activity
wine/dlls/combase/rpc.c
Michael Stefaniuc e2ac51d89e combase: Use wide-char string literals. 
Signed-off-by: Michael Stefaniuc <mstefani@winehq.org>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
2020-10-05 12:33:31 +02:00

2111 lines
67 KiB
C
Raw Blame History

/*
* Copyright 2001 Ove Kåven, TransGaming Technologies
* Copyright 2002 Marcus Meissner
* Copyright 2005 Mike Hearn, Rob Shearman for CodeWeavers
*
* 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 <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winsvc.h"
#include "servprov.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "wine/heap.h"
#include "combase_private.h"
#include "irpcss.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
static void __RPC_STUB dispatch_rpc(RPC_MESSAGE *msg);
/* we only use one function to dispatch calls for all methods - we use the
* RPC_IF_OLE flag to tell the RPC runtime that this is the case */
static RPC_DISPATCH_FUNCTION rpc_dispatch_table[1] = { dispatch_rpc }; /* (RO) */
static RPC_DISPATCH_TABLE rpc_dispatch = { 1, rpc_dispatch_table }; /* (RO) */
static struct list registered_interfaces = LIST_INIT(registered_interfaces); /* (CS csRegIf) */
static CRITICAL_SECTION csRegIf;
static CRITICAL_SECTION_DEBUG csRegIf_debug =
{
0, 0, &csRegIf,
{ &csRegIf_debug.ProcessLocksList, &csRegIf_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": dcom registered server interfaces") }
};
static CRITICAL_SECTION csRegIf = { &csRegIf_debug, -1, 0, 0, 0, 0 };
static struct list channel_hooks = LIST_INIT(channel_hooks); /* (CS csChannelHook) */
static CRITICAL_SECTION csChannelHook;
static CRITICAL_SECTION_DEBUG csChannelHook_debug =
{
0, 0, &csChannelHook,
{ &csChannelHook_debug.ProcessLocksList, &csChannelHook_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": channel hooks") }
};
static CRITICAL_SECTION csChannelHook = { &csChannelHook_debug, -1, 0, 0, 0, 0 };
static WCHAR rpctransportW[] = L"ncalrpc";
struct registered_if
{
struct list entry;
DWORD refs; /* ref count */
RPC_SERVER_INTERFACE If; /* interface registered with the RPC runtime */
};
/* get the pipe endpoint specified of the specified apartment */
static inline void get_rpc_endpoint(LPWSTR endpoint, const OXID *oxid)
{
/* FIXME: should get endpoint from rpcss */
wsprintfW(endpoint, L"\\pipe\\OLE_%08lx%08lx", (DWORD)(*oxid >> 32), (DWORD)*oxid);
}
typedef struct
{
IRpcChannelBuffer IRpcChannelBuffer_iface;
LONG refs;
DWORD dest_context; /* returned from GetDestCtx */
void *dest_context_data; /* returned from GetDestCtx */
} RpcChannelBuffer;
typedef struct
{
RpcChannelBuffer super; /* superclass */
RPC_BINDING_HANDLE bind; /* handle to the remote server */
OXID oxid; /* apartment in which the channel is valid */
DWORD server_pid; /* id of server process */
HANDLE event; /* cached event handle */
IID iid; /* IID of the proxy this belongs to */
} ClientRpcChannelBuffer;
struct dispatch_params
{
RPCOLEMESSAGE *msg; /* message */
IRpcStubBuffer *stub; /* stub buffer, if applicable */
IRpcChannelBuffer *chan; /* server channel buffer, if applicable */
IID iid; /* ID of interface being called */
IUnknown *iface; /* interface being called */
HANDLE handle; /* handle that will become signaled when call finishes */
BOOL bypass_rpcrt; /* bypass RPC runtime? */
RPC_STATUS status; /* status (out) */
HRESULT hr; /* hresult (out) */
};
struct message_state
{
RPC_BINDING_HANDLE binding_handle;
ULONG prefix_data_len;
SChannelHookCallInfo channel_hook_info;
BOOL bypass_rpcrt;
/* client only */
HWND target_hwnd;
DWORD target_tid;
struct dispatch_params params;
};
typedef struct
{
ULONG conformance; /* NDR */
GUID id;
ULONG size;
/* [size_is((size+7)&~7)] */ unsigned char data[1];
} WIRE_ORPC_EXTENT;
typedef struct
{
ULONG size;
ULONG reserved;
unsigned char extent[1];
} WIRE_ORPC_EXTENT_ARRAY;
typedef struct
{
ULONG version;
ULONG flags;
ULONG reserved1;
GUID cid;
unsigned char extensions[1];
} WIRE_ORPCTHIS;
typedef struct
{
ULONG flags;
unsigned char extensions[1];
} WIRE_ORPCTHAT;
struct channel_hook_entry
{
struct list entry;
GUID id;
IChannelHook *hook;
};
struct channel_hook_buffer_data
{
GUID id;
ULONG extension_size;
};
void * __RPC_USER MIDL_user_allocate(SIZE_T size)
{
return heap_alloc(size);
}
void __RPC_USER MIDL_user_free(void *p)
{
heap_free(p);
}
static LONG WINAPI rpc_filter(EXCEPTION_POINTERS *eptr)
{
return I_RpcExceptionFilter(eptr->ExceptionRecord->ExceptionCode);
}
static BOOL start_rpcss(void)
{
SERVICE_STATUS_PROCESS status;
SC_HANDLE scm, service;
BOOL ret = FALSE;
TRACE("\n");
if (!(scm = OpenSCManagerW(NULL, NULL, 0)))
{
ERR("Failed to open service manager\n");
return FALSE;
}
if (!(service = OpenServiceW(scm, L"RpcSs", SERVICE_START | SERVICE_QUERY_STATUS)))
{
ERR("Failed to open RpcSs service\n");
CloseServiceHandle( scm );
return FALSE;
}
if (StartServiceW(service, 0, NULL) || GetLastError() == ERROR_SERVICE_ALREADY_RUNNING)
{
ULONGLONG start_time = GetTickCount64();
do
{
DWORD dummy;
if (!QueryServiceStatusEx(service, SC_STATUS_PROCESS_INFO, (BYTE *)&status, sizeof(status), &dummy))
break;
if (status.dwCurrentState == SERVICE_RUNNING)
{
ret = TRUE;
break;
}
if (GetTickCount64() - start_time > 30000) break;
Sleep( 100 );
} while (status.dwCurrentState == SERVICE_START_PENDING);
if (status.dwCurrentState != SERVICE_RUNNING)
WARN("RpcSs failed to start %u\n", status.dwCurrentState);
}
else
ERR("Failed to start RpcSs service\n");
CloseServiceHandle(service);
CloseServiceHandle(scm);
return ret;
}
static RPC_BINDING_HANDLE get_rpc_handle(unsigned short *protseq, unsigned short *endpoint)
{
RPC_BINDING_HANDLE handle = NULL;
RPC_STATUS status;
RPC_WSTR binding;
status = RpcStringBindingComposeW(NULL, protseq, NULL, endpoint, NULL, &binding);
if (status == RPC_S_OK)
{
status = RpcBindingFromStringBindingW(binding, &handle);
RpcStringFreeW(&binding);
}
return handle;
}
static RPC_BINDING_HANDLE get_irpcss_handle(void)
{
static RPC_BINDING_HANDLE irpcss_handle;
if (!irpcss_handle)
{
unsigned short protseq[] = IRPCSS_PROTSEQ;
unsigned short endpoint[] = IRPCSS_ENDPOINT;
RPC_BINDING_HANDLE new_handle = get_rpc_handle(protseq, endpoint);
if (InterlockedCompareExchangePointer(&irpcss_handle, new_handle, NULL))
/* another thread beat us to it */
RpcBindingFree(&new_handle);
}
return irpcss_handle;
}
static RPC_BINDING_HANDLE get_irot_handle(void)
{
static RPC_BINDING_HANDLE irot_handle;
if (!irot_handle)
{
unsigned short protseq[] = IROT_PROTSEQ;
unsigned short endpoint[] = IROT_ENDPOINT;
RPC_BINDING_HANDLE new_handle = get_rpc_handle(protseq, endpoint);
if (InterlockedCompareExchangePointer(&irot_handle, new_handle, NULL))
/* another thread beat us to it */
RpcBindingFree(&new_handle);
}
return irot_handle;
}
#define RPCSS_CALL_START \
HRESULT hr; \
for (;;) { \
__TRY {
#define RPCSS_CALL_END \
} __EXCEPT(rpc_filter) { \
hr = HRESULT_FROM_WIN32(GetExceptionCode()); \
} \
__ENDTRY \
if (hr == HRESULT_FROM_WIN32(RPC_S_SERVER_UNAVAILABLE)) { \
if (start_rpcss()) \
continue; \
} \
break; \
} \
return hr;
HRESULT rpcss_get_next_seqid(DWORD *id)
{
RPCSS_CALL_START
hr = irpcss_get_thread_seq_id(get_irpcss_handle(), id);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotRegister(const MonikerComparisonData *moniker_data,
const InterfaceData *object, const InterfaceData *moniker,
const FILETIME *time, DWORD flags, IrotCookie *cookie, IrotContextHandle *ctxt_handle)
{
RPCSS_CALL_START
hr = IrotRegister(get_irot_handle(), moniker_data, object, moniker, time, flags, cookie, ctxt_handle);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotIsRunning(const MonikerComparisonData *moniker_data)
{
RPCSS_CALL_START
hr = IrotIsRunning(get_irot_handle(), moniker_data);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotGetObject(const MonikerComparisonData *moniker_data, PInterfaceData *obj,
IrotCookie *cookie)
{
RPCSS_CALL_START
hr = IrotGetObject(get_irot_handle(), moniker_data, obj, cookie);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotNoteChangeTime(IrotCookie cookie, const FILETIME *time)
{
RPCSS_CALL_START
hr = IrotNoteChangeTime(get_irot_handle(), cookie, time);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotGetTimeOfLastChange(const MonikerComparisonData *moniker_data, FILETIME *time)
{
RPCSS_CALL_START
hr = IrotGetTimeOfLastChange(get_irot_handle(), moniker_data, time);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotEnumRunning(PInterfaceList *list)
{
RPCSS_CALL_START
hr = IrotEnumRunning(get_irot_handle(), list);
RPCSS_CALL_END
}
HRESULT WINAPI InternalIrotRevoke(IrotCookie cookie, IrotContextHandle *ctxt_handle, PInterfaceData *object,
PInterfaceData *moniker)
{
RPCSS_CALL_START
hr = IrotRevoke(get_irot_handle(), cookie, ctxt_handle, object, moniker);
RPCSS_CALL_END
}
static HRESULT rpcss_server_register(REFCLSID clsid, DWORD flags, MInterfacePointer *obj, unsigned int *cookie)
{
RPCSS_CALL_START
hr = irpcss_server_register(get_irpcss_handle(), clsid, flags, obj, cookie);
RPCSS_CALL_END
}
HRESULT rpc_revoke_local_server(unsigned int cookie)
{
RPCSS_CALL_START
hr = irpcss_server_revoke(get_irpcss_handle(), cookie);
RPCSS_CALL_END
}
static HRESULT rpcss_get_class_object(REFCLSID rclsid, PMInterfacePointer *objref)
{
RPCSS_CALL_START
hr = irpcss_get_class_object(get_irpcss_handle(), rclsid, objref);
RPCSS_CALL_END
}
static DWORD start_local_service(const WCHAR *name, DWORD num, LPCWSTR *params)
{
SC_HANDLE handle, hsvc;
DWORD r = ERROR_FUNCTION_FAILED;
TRACE("Starting service %s %d params\n", debugstr_w(name), num);
handle = OpenSCManagerW(NULL, NULL, SC_MANAGER_CONNECT);
if (!handle)
return r;
hsvc = OpenServiceW(handle, name, SERVICE_START);
if (hsvc)
{
if(StartServiceW(hsvc, num, params))
r = ERROR_SUCCESS;
else
r = GetLastError();
if (r == ERROR_SERVICE_ALREADY_RUNNING)
r = ERROR_SUCCESS;
CloseServiceHandle(hsvc);
}
else
r = GetLastError();
CloseServiceHandle(handle);
TRACE("StartService returned error %u (%s)\n", r, (r == ERROR_SUCCESS) ? "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 hr;
WCHAR buf[CHARS_IN_GUID];
HKEY hkey;
LONG r;
DWORD type, sz;
TRACE("Attempting to start Local service for %s\n", debugstr_guid(rclsid));
hr = open_appidkey_from_clsid(rclsid, KEY_READ, &hkey);
if (FAILED(hr))
return hr;
/* read the LocalService and ServiceParameters values from the AppID key */
sz = sizeof buf;
r = RegQueryValueExW(hkey, L"LocalService", 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, L"ServiceParams", NULL, &type, NULL, &sz);
if (r == ERROR_SUCCESS && type == REG_SZ && sz)
{
args[0] = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sz);
num_args++;
RegQueryValueExW(hkey, L"ServiceParams", NULL, &type, (LPBYTE)args[0], &sz);
}
r = start_local_service(buf, num_args, (LPCWSTR *)args);
if (r != ERROR_SUCCESS)
hr = REGDB_E_CLASSNOTREG; /* FIXME: check retval */
HeapFree(GetProcessHeap(),0,args[0]);
}
else
{
WARN("No LocalService value\n");
hr = REGDB_E_CLASSNOTREG; /* FIXME: check retval */
}
RegCloseKey(hkey);
return hr;
}
static HRESULT create_server(REFCLSID rclsid, HANDLE *process)
{
static const WCHAR embeddingW[] = L" -Embedding";
HKEY key;
HRESULT hr;
WCHAR command[MAX_PATH + ARRAY_SIZE(embeddingW)];
DWORD size = (MAX_PATH+1) * sizeof(WCHAR);
STARTUPINFOW sinfo;
PROCESS_INFORMATION pinfo;
LONG ret;
hr = open_key_for_clsid(rclsid, L"LocalServer32", KEY_READ, &key);
if (FAILED(hr))
{
ERR("class %s not registered\n", debugstr_guid(rclsid));
return hr;
}
ret = RegQueryValueExW(key, NULL, NULL, NULL, (LPBYTE)command, &size);
RegCloseKey(key);
if (ret)
{
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. */
lstrcatW(command, embeddingW);
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, DETACHED_PROCESS, NULL, NULL, &sinfo, &pinfo))
{
WARN("failed to run local server %s\n", debugstr_w(command));
return HRESULT_FROM_WIN32(GetLastError());
}
*process = pinfo.hProcess;
CloseHandle(pinfo.hThread);
return S_OK;
}
HRESULT rpc_get_local_class_object(REFCLSID rclsid, REFIID riid, void **obj)
{
PMInterfacePointer objref = NULL;
IServiceProvider *local_server;
IStream *stream = NULL;
ULARGE_INTEGER newpos;
LARGE_INTEGER seekto;
int tries = 0;
ULONG length;
HRESULT hr;
static const int MAXTRIES = 30; /* 30 seconds */
TRACE("clsid %s, riid %s\n", debugstr_guid(rclsid), debugstr_guid(riid));
while (tries++ < MAXTRIES)
{
DWORD index, start_ticks;
HANDLE process = 0;
if (SUCCEEDED(hr = rpcss_get_class_object(rclsid, &objref)))
break;
if (tries == 1)
{
if ((hr = create_local_service(rclsid)) && (hr = create_server(rclsid, &process)) )
return hr;
}
/* Wait for one second, even if messages arrive. */
start_ticks = GetTickCount();
do
{
if (SUCCEEDED(CoWaitForMultipleHandles(0, 1000, (process != 0), &process, &index)) && process && !index)
{
WARN("Server for %s failed to start.\n", debugstr_guid(rclsid));
CloseHandle(process);
return E_NOINTERFACE;
}
} while (GetTickCount() - start_ticks < 1000);
if (process) CloseHandle(process);
}
if (!objref || tries >= MAXTRIES)
return E_NOINTERFACE;
if (SUCCEEDED(hr = CreateStreamOnHGlobal(0, TRUE, &stream)))
hr = IStream_Write(stream, objref->abData, objref->ulCntData, &length);
MIDL_user_free(objref);
if (SUCCEEDED(hr))
{
seekto.QuadPart = 0;
IStream_Seek(stream, seekto, STREAM_SEEK_SET, &newpos);
TRACE("Unmarshalling local server.\n");
hr = CoUnmarshalInterface(stream, &IID_IServiceProvider, (void **)&local_server);
if (SUCCEEDED(hr))
{
hr = IServiceProvider_QueryService(local_server, rclsid, riid, obj);
IServiceProvider_Release(local_server);
}
}
if (stream)
IStream_Release(stream);
return hr;
}
HRESULT rpc_register_local_server(REFCLSID clsid, IStream *stream, DWORD flags, unsigned int *cookie)
{
MInterfacePointer *obj;
const void *ptr;
HGLOBAL hmem;
SIZE_T size;
HRESULT hr;
TRACE("%s, %#x\n", debugstr_guid(clsid), flags);
hr = GetHGlobalFromStream(stream, &hmem);
if (FAILED(hr)) return hr;
size = GlobalSize(hmem);
if (!(obj = heap_alloc(FIELD_OFFSET(MInterfacePointer, abData[size]))))
return E_OUTOFMEMORY;
obj->ulCntData = size;
ptr = GlobalLock(hmem);
memcpy(obj->abData, ptr, size);
GlobalUnlock(hmem);
hr = rpcss_server_register(clsid, flags, obj, cookie);
heap_free(obj);
return hr;
}
static HRESULT unmarshal_ORPCTHAT(RPC_MESSAGE *msg, ORPCTHAT *orpcthat, ORPC_EXTENT_ARRAY *orpc_ext_array,
WIRE_ORPC_EXTENT **first_wire_orpc_extent);
/* Channel Hook Functions */
static ULONG ChannelHooks_ClientGetSize(SChannelHookCallInfo *info, struct channel_hook_buffer_data **data,
unsigned int *hook_count, ULONG *extension_count)
{
struct channel_hook_entry *entry;
ULONG total_size = 0;
unsigned int hook_index = 0;
*hook_count = 0;
*extension_count = 0;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
(*hook_count)++;
if (*hook_count)
*data = HeapAlloc(GetProcessHeap(), 0, *hook_count * sizeof(struct channel_hook_buffer_data));
else
*data = NULL;
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
{
ULONG extension_size = 0;
IChannelHook_ClientGetSize(entry->hook, &entry->id, &info->iid, &extension_size);
TRACE("%s: extension_size = %u\n", debugstr_guid(&entry->id), extension_size);
extension_size = (extension_size+7)&~7;
(*data)[hook_index].id = entry->id;
(*data)[hook_index].extension_size = extension_size;
/* an extension is only put onto the wire if it has data to write */
if (extension_size)
{
total_size += FIELD_OFFSET(WIRE_ORPC_EXTENT, data[extension_size]);
(*extension_count)++;
}
hook_index++;
}
LeaveCriticalSection(&csChannelHook);
return total_size;
}
static unsigned char * ChannelHooks_ClientFillBuffer(SChannelHookCallInfo *info,
unsigned char *buffer, struct channel_hook_buffer_data *data,
unsigned int hook_count)
{
struct channel_hook_entry *entry;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
{
unsigned int i;
ULONG extension_size = 0;
WIRE_ORPC_EXTENT *wire_orpc_extent = (WIRE_ORPC_EXTENT *)buffer;
for (i = 0; i < hook_count; i++)
if (IsEqualGUID(&entry->id, &data[i].id))
extension_size = data[i].extension_size;
/* an extension is only put onto the wire if it has data to write */
if (!extension_size)
continue;
IChannelHook_ClientFillBuffer(entry->hook, &entry->id, &info->iid,
&extension_size, buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT, data[0]));
TRACE("%s: extension_size = %u\n", debugstr_guid(&entry->id), extension_size);
/* FIXME: set unused portion of wire_orpc_extent->data to 0? */
wire_orpc_extent->conformance = (extension_size+7)&~7;
wire_orpc_extent->size = extension_size;
wire_orpc_extent->id = entry->id;
buffer += FIELD_OFFSET(WIRE_ORPC_EXTENT, data[wire_orpc_extent->conformance]);
}
LeaveCriticalSection(&csChannelHook);
return buffer;
}
static void ChannelHooks_ServerNotify(SChannelHookCallInfo *info,
DWORD lDataRep, WIRE_ORPC_EXTENT *first_wire_orpc_extent,
ULONG extension_count)
{
struct channel_hook_entry *entry;
ULONG i;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
{
WIRE_ORPC_EXTENT *wire_orpc_extent;
for (i = 0, wire_orpc_extent = first_wire_orpc_extent;
i < extension_count;
i++, wire_orpc_extent = (WIRE_ORPC_EXTENT *)&wire_orpc_extent->data[wire_orpc_extent->conformance])
{
if (IsEqualGUID(&entry->id, &wire_orpc_extent->id))
break;
}
if (i == extension_count) wire_orpc_extent = NULL;
IChannelHook_ServerNotify(entry->hook, &entry->id, &info->iid,
wire_orpc_extent ? wire_orpc_extent->size : 0,
wire_orpc_extent ? wire_orpc_extent->data : NULL,
lDataRep);
}
LeaveCriticalSection(&csChannelHook);
}
static ULONG ChannelHooks_ServerGetSize(SChannelHookCallInfo *info,
struct channel_hook_buffer_data **data, unsigned int *hook_count,
ULONG *extension_count)
{
struct channel_hook_entry *entry;
ULONG total_size = 0;
unsigned int hook_index = 0;
*hook_count = 0;
*extension_count = 0;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
(*hook_count)++;
if (*hook_count)
*data = HeapAlloc(GetProcessHeap(), 0, *hook_count * sizeof(struct channel_hook_buffer_data));
else
*data = NULL;
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
{
ULONG extension_size = 0;
IChannelHook_ServerGetSize(entry->hook, &entry->id, &info->iid, S_OK,
&extension_size);
TRACE("%s: extension_size = %u\n", debugstr_guid(&entry->id), extension_size);
extension_size = (extension_size+7)&~7;
(*data)[hook_index].id = entry->id;
(*data)[hook_index].extension_size = extension_size;
/* an extension is only put onto the wire if it has data to write */
if (extension_size)
{
total_size += FIELD_OFFSET(WIRE_ORPC_EXTENT, data[extension_size]);
(*extension_count)++;
}
hook_index++;
}
LeaveCriticalSection(&csChannelHook);
return total_size;
}
static unsigned char * ChannelHooks_ServerFillBuffer(SChannelHookCallInfo *info,
unsigned char *buffer, struct channel_hook_buffer_data *data,
unsigned int hook_count)
{
struct channel_hook_entry *entry;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
{
unsigned int i;
ULONG extension_size = 0;
WIRE_ORPC_EXTENT *wire_orpc_extent = (WIRE_ORPC_EXTENT *)buffer;
for (i = 0; i < hook_count; i++)
if (IsEqualGUID(&entry->id, &data[i].id))
extension_size = data[i].extension_size;
/* an extension is only put onto the wire if it has data to write */
if (!extension_size)
continue;
IChannelHook_ServerFillBuffer(entry->hook, &entry->id, &info->iid,
&extension_size, buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT, data[0]),
S_OK);
TRACE("%s: extension_size = %u\n", debugstr_guid(&entry->id), extension_size);
/* FIXME: set unused portion of wire_orpc_extent->data to 0? */
wire_orpc_extent->conformance = (extension_size+7)&~7;
wire_orpc_extent->size = extension_size;
wire_orpc_extent->id = entry->id;
buffer += FIELD_OFFSET(WIRE_ORPC_EXTENT, data[wire_orpc_extent->conformance]);
}
LeaveCriticalSection(&csChannelHook);
return buffer;
}
static void ChannelHooks_ClientNotify(SChannelHookCallInfo *info,
DWORD lDataRep, WIRE_ORPC_EXTENT *first_wire_orpc_extent,
ULONG extension_count, HRESULT hrFault)
{
struct channel_hook_entry *entry;
ULONG i;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY(entry, &channel_hooks, struct channel_hook_entry, entry)
{
WIRE_ORPC_EXTENT *wire_orpc_extent;
for (i = 0, wire_orpc_extent = first_wire_orpc_extent;
i < extension_count;
i++, wire_orpc_extent = (WIRE_ORPC_EXTENT *)&wire_orpc_extent->data[wire_orpc_extent->conformance])
{
if (IsEqualGUID(&entry->id, &wire_orpc_extent->id))
break;
}
if (i == extension_count) wire_orpc_extent = NULL;
IChannelHook_ClientNotify(entry->hook, &entry->id, &info->iid,
wire_orpc_extent ? wire_orpc_extent->size : 0,
wire_orpc_extent ? wire_orpc_extent->data : NULL,
lDataRep, hrFault);
}
LeaveCriticalSection(&csChannelHook);
}
HRESULT rpc_register_channel_hook(REFGUID rguid, IChannelHook *hook)
{
struct channel_hook_entry *entry;
entry = HeapAlloc(GetProcessHeap(), 0, sizeof(*entry));
if (!entry)
return E_OUTOFMEMORY;
entry->id = *rguid;
entry->hook = hook;
IChannelHook_AddRef(hook);
EnterCriticalSection(&csChannelHook);
list_add_tail(&channel_hooks, &entry->entry);
LeaveCriticalSection(&csChannelHook);
return S_OK;
}
void rpc_unregister_channel_hooks(void)
{
struct channel_hook_entry *cursor;
struct channel_hook_entry *cursor2;
EnterCriticalSection(&csChannelHook);
LIST_FOR_EACH_ENTRY_SAFE(cursor, cursor2, &channel_hooks, struct channel_hook_entry, entry)
HeapFree(GetProcessHeap(), 0, cursor);
LeaveCriticalSection(&csChannelHook);
DeleteCriticalSection(&csChannelHook);
DeleteCriticalSection(&csRegIf);
}
/* RPC Channel Buffer Functions */
static HRESULT WINAPI RpcChannelBuffer_QueryInterface(IRpcChannelBuffer *iface, REFIID riid, LPVOID *ppv)
{
*ppv = NULL;
if (IsEqualIID(riid,&IID_IRpcChannelBuffer) || IsEqualIID(riid,&IID_IUnknown))
{
*ppv = iface;
IRpcChannelBuffer_AddRef(iface);
return S_OK;
}
return E_NOINTERFACE;
}
static ULONG WINAPI RpcChannelBuffer_AddRef(LPRPCCHANNELBUFFER iface)
{
RpcChannelBuffer *This = (RpcChannelBuffer *)iface;
return InterlockedIncrement(&This->refs);
}
static ULONG WINAPI ServerRpcChannelBuffer_Release(LPRPCCHANNELBUFFER iface)
{
RpcChannelBuffer *This = (RpcChannelBuffer *)iface;
ULONG ref;
ref = InterlockedDecrement(&This->refs);
if (ref)
return ref;
HeapFree(GetProcessHeap(), 0, This);
return 0;
}
static ULONG WINAPI ClientRpcChannelBuffer_Release(LPRPCCHANNELBUFFER iface)
{
ClientRpcChannelBuffer *This = (ClientRpcChannelBuffer *)iface;
ULONG ref;
ref = InterlockedDecrement(&This->super.refs);
if (ref)
return ref;
if (This->event) CloseHandle(This->event);
RpcBindingFree(&This->bind);
HeapFree(GetProcessHeap(), 0, This);
return 0;
}
static HRESULT WINAPI ServerRpcChannelBuffer_GetBuffer(LPRPCCHANNELBUFFER iface, RPCOLEMESSAGE* olemsg, REFIID riid)
{
RpcChannelBuffer *This = (RpcChannelBuffer *)iface;
RPC_MESSAGE *msg = (RPC_MESSAGE *)olemsg;
RPC_STATUS status;
ORPCTHAT *orpcthat;
struct message_state *message_state;
ULONG extensions_size;
struct channel_hook_buffer_data *channel_hook_data;
unsigned int channel_hook_count;
ULONG extension_count;
TRACE("(%p)->(%p,%s)\n", This, olemsg, debugstr_guid(riid));
message_state = msg->Handle;
/* restore the binding handle and the real start of data */
msg->Handle = message_state->binding_handle;
msg->Buffer = (char *)msg->Buffer - message_state->prefix_data_len;
extensions_size = ChannelHooks_ServerGetSize(&message_state->channel_hook_info,
&channel_hook_data, &channel_hook_count, &extension_count);
msg->BufferLength += FIELD_OFFSET(WIRE_ORPCTHAT, extensions) + sizeof(DWORD);
if (extensions_size)
{
msg->BufferLength += FIELD_OFFSET(WIRE_ORPC_EXTENT_ARRAY, extent[2*sizeof(DWORD) + extensions_size]);
if (extension_count & 1)
msg->BufferLength += FIELD_OFFSET(WIRE_ORPC_EXTENT, data[0]);
}
if (message_state->bypass_rpcrt)
{
msg->Buffer = HeapAlloc(GetProcessHeap(), 0, msg->BufferLength);
if (msg->Buffer)
status = RPC_S_OK;
else
{
HeapFree(GetProcessHeap(), 0, channel_hook_data);
return E_OUTOFMEMORY;
}
}
else
status = I_RpcGetBuffer(msg);
orpcthat = msg->Buffer;
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPCTHAT, extensions);
orpcthat->flags = ORPCF_NULL /* FIXME? */;
/* NDR representation of orpcthat->extensions */
*(DWORD *)msg->Buffer = extensions_size ? 1 : 0;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
if (extensions_size)
{
WIRE_ORPC_EXTENT_ARRAY *orpc_extent_array = msg->Buffer;
orpc_extent_array->size = extension_count;
orpc_extent_array->reserved = 0;
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT_ARRAY, extent);
/* NDR representation of orpc_extent_array->extent */
*(DWORD *)msg->Buffer = 1;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
/* NDR representation of [size_is] attribute of orpc_extent_array->extent */
*(DWORD *)msg->Buffer = (extension_count + 1) & ~1;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
msg->Buffer = ChannelHooks_ServerFillBuffer(&message_state->channel_hook_info,
msg->Buffer, channel_hook_data, channel_hook_count);
/* we must add a dummy extension if there is an odd extension
* count to meet the contract specified by the size_is attribute */
if (extension_count & 1)
{
WIRE_ORPC_EXTENT *wire_orpc_extent = msg->Buffer;
wire_orpc_extent->conformance = 0;
wire_orpc_extent->id = GUID_NULL;
wire_orpc_extent->size = 0;
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT, data[0]);
}
}
HeapFree(GetProcessHeap(), 0, channel_hook_data);
/* store the prefixed data length so that we can restore the real buffer
* later */
message_state->prefix_data_len = (char *)msg->Buffer - (char *)orpcthat;
msg->BufferLength -= message_state->prefix_data_len;
/* save away the message state again */
msg->Handle = message_state;
TRACE("-- %d\n", status);
return HRESULT_FROM_WIN32(status);
}
static HANDLE ClientRpcChannelBuffer_GetEventHandle(ClientRpcChannelBuffer *This)
{
HANDLE event = InterlockedExchangePointer(&This->event, NULL);
/* Note: must be auto-reset event so we can reuse it without a call
* to ResetEvent */
if (!event) event = CreateEventW(NULL, FALSE, FALSE, NULL);
return event;
}
static void ClientRpcChannelBuffer_ReleaseEventHandle(ClientRpcChannelBuffer *This, HANDLE event)
{
if (InterlockedCompareExchangePointer(&This->event, event, NULL))
/* already a handle cached in This */
CloseHandle(event);
}
static HRESULT WINAPI ClientRpcChannelBuffer_GetBuffer(LPRPCCHANNELBUFFER iface, RPCOLEMESSAGE* olemsg, REFIID riid)
{
ClientRpcChannelBuffer *This = (ClientRpcChannelBuffer *)iface;
RPC_MESSAGE *msg = (RPC_MESSAGE *)olemsg;
RPC_CLIENT_INTERFACE *cif;
RPC_STATUS status;
ORPCTHIS *orpcthis;
struct message_state *message_state;
ULONG extensions_size;
struct channel_hook_buffer_data *channel_hook_data;
unsigned int channel_hook_count;
ULONG extension_count;
IPID ipid;
HRESULT hr;
struct apartment *apt = NULL;
TRACE("(%p)->(%p,%s)\n", This, olemsg, debugstr_guid(riid));
cif = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(RPC_CLIENT_INTERFACE));
if (!cif)
return E_OUTOFMEMORY;
message_state = HeapAlloc(GetProcessHeap(), 0, sizeof(*message_state));
if (!message_state)
{
HeapFree(GetProcessHeap(), 0, cif);
return E_OUTOFMEMORY;
}
cif->Length = sizeof(RPC_CLIENT_INTERFACE);
/* RPC interface ID = COM interface ID */
cif->InterfaceId.SyntaxGUID = This->iid;
/* COM objects always have a version of 0.0 */
cif->InterfaceId.SyntaxVersion.MajorVersion = 0;
cif->InterfaceId.SyntaxVersion.MinorVersion = 0;
msg->Handle = This->bind;
msg->RpcInterfaceInformation = cif;
message_state->prefix_data_len = 0;
message_state->binding_handle = This->bind;
message_state->channel_hook_info.iid = *riid;
message_state->channel_hook_info.cbSize = sizeof(message_state->channel_hook_info);
CoGetCurrentLogicalThreadId(&message_state->channel_hook_info.uCausality);
message_state->channel_hook_info.dwServerPid = This->server_pid;
message_state->channel_hook_info.iMethod = msg->ProcNum & ~RPC_FLAGS_VALID_BIT;
message_state->channel_hook_info.pObject = NULL; /* only present on server-side */
message_state->target_hwnd = NULL;
message_state->target_tid = 0;
memset(&message_state->params, 0, sizeof(message_state->params));
extensions_size = ChannelHooks_ClientGetSize(&message_state->channel_hook_info,
&channel_hook_data, &channel_hook_count, &extension_count);
msg->BufferLength += FIELD_OFFSET(WIRE_ORPCTHIS, extensions) + sizeof(DWORD);
if (extensions_size)
{
msg->BufferLength += FIELD_OFFSET(WIRE_ORPC_EXTENT_ARRAY, extent[2*sizeof(DWORD) + extensions_size]);
if (extension_count & 1)
msg->BufferLength += FIELD_OFFSET(WIRE_ORPC_EXTENT, data[0]);
}
RpcBindingInqObject(message_state->binding_handle, &ipid);
hr = ipid_get_dispatch_params(&ipid, &apt, NULL, &message_state->params.stub,
&message_state->params.chan,
&message_state->params.iid,
&message_state->params.iface);
if (hr == S_OK)
{
/* stub, chan, iface and iid are unneeded in multi-threaded case as we go
* via the RPC runtime */
if (apt->multi_threaded)
{
IRpcStubBuffer_Release(message_state->params.stub);
message_state->params.stub = NULL;
IRpcChannelBuffer_Release(message_state->params.chan);
message_state->params.chan = NULL;
message_state->params.iface = NULL;
}
else
{
message_state->params.bypass_rpcrt = TRUE;
message_state->target_hwnd = apartment_getwindow(apt);
message_state->target_tid = apt->tid;
/* we assume later on that this being non-NULL is the indicator that
* means call directly instead of going through RPC runtime */
if (!message_state->target_hwnd)
ERR("window for apartment %s is NULL\n", wine_dbgstr_longlong(apt->oxid));
}
}
if (apt) apartment_release(apt);
message_state->params.handle = ClientRpcChannelBuffer_GetEventHandle(This);
/* Note: message_state->params.msg is initialised in
* ClientRpcChannelBuffer_SendReceive */
/* shortcut the RPC runtime */
if (message_state->target_hwnd)
{
msg->Buffer = HeapAlloc(GetProcessHeap(), 0, msg->BufferLength);
if (msg->Buffer)
status = RPC_S_OK;
else
status = ERROR_OUTOFMEMORY;
}
else
status = I_RpcGetBuffer(msg);
msg->Handle = message_state;
if (status == RPC_S_OK)
{
orpcthis = msg->Buffer;
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPCTHIS, extensions);
orpcthis->version.MajorVersion = COM_MAJOR_VERSION;
orpcthis->version.MinorVersion = COM_MINOR_VERSION;
orpcthis->flags = message_state->channel_hook_info.dwServerPid ? ORPCF_LOCAL : ORPCF_NULL;
orpcthis->reserved1 = 0;
orpcthis->cid = message_state->channel_hook_info.uCausality;
/* NDR representation of orpcthis->extensions */
*(DWORD *)msg->Buffer = extensions_size ? 1 : 0;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
if (extensions_size)
{
ORPC_EXTENT_ARRAY *orpc_extent_array = msg->Buffer;
orpc_extent_array->size = extension_count;
orpc_extent_array->reserved = 0;
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT_ARRAY, extent);
/* NDR representation of orpc_extent_array->extent */
*(DWORD *)msg->Buffer = 1;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
/* NDR representation of [size_is] attribute of orpc_extent_array->extent */
*(DWORD *)msg->Buffer = (extension_count + 1) & ~1;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
msg->Buffer = ChannelHooks_ClientFillBuffer(&message_state->channel_hook_info,
msg->Buffer, channel_hook_data, channel_hook_count);
/* we must add a dummy extension if there is an odd extension
* count to meet the contract specified by the size_is attribute */
if (extension_count & 1)
{
WIRE_ORPC_EXTENT *wire_orpc_extent = msg->Buffer;
wire_orpc_extent->conformance = 0;
wire_orpc_extent->id = GUID_NULL;
wire_orpc_extent->size = 0;
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT, data[0]);
}
}
/* store the prefixed data length so that we can restore the real buffer
* pointer in ClientRpcChannelBuffer_SendReceive. */
message_state->prefix_data_len = (char *)msg->Buffer - (char *)orpcthis;
msg->BufferLength -= message_state->prefix_data_len;
}
HeapFree(GetProcessHeap(), 0, channel_hook_data);
TRACE("-- %d\n", status);
return HRESULT_FROM_WIN32(status);
}
static HRESULT WINAPI ServerRpcChannelBuffer_SendReceive(LPRPCCHANNELBUFFER iface, RPCOLEMESSAGE *olemsg, ULONG *pstatus)
{
FIXME("stub\n");
return E_NOTIMPL;
}
/* this thread runs an outgoing RPC */
static DWORD WINAPI rpc_sendreceive_thread(LPVOID param)
{
struct dispatch_params *data = param;
/* Note: I_RpcSendReceive doesn't raise exceptions like the higher-level
* RPC functions do */
data->status = I_RpcSendReceive((RPC_MESSAGE *)data->msg);
TRACE("completed with status 0x%x\n", data->status);
SetEvent(data->handle);
return 0;
}
static inline HRESULT ClientRpcChannelBuffer_IsCorrectApartment(ClientRpcChannelBuffer *This, const struct apartment *apt)
{
if (!apt)
return S_FALSE;
if (This->oxid != apartment_getoxid(apt))
return S_FALSE;
return S_OK;
}
static HRESULT WINAPI ClientRpcChannelBuffer_SendReceive(LPRPCCHANNELBUFFER iface, RPCOLEMESSAGE *olemsg, ULONG *pstatus)
{
ClientRpcChannelBuffer *This = (ClientRpcChannelBuffer *)iface;
HRESULT hr;
RPC_MESSAGE *msg = (RPC_MESSAGE *)olemsg;
RPC_STATUS status;
DWORD index;
struct message_state *message_state;
ORPCTHAT orpcthat;
ORPC_EXTENT_ARRAY orpc_ext_array;
WIRE_ORPC_EXTENT *first_wire_orpc_extent = NULL;
HRESULT hrFault = S_OK;
struct apartment *apt = apartment_get_current_or_mta();
struct tlsdata *tlsdata;
TRACE("(%p) iMethod=%d\n", olemsg, olemsg->iMethod);
hr = ClientRpcChannelBuffer_IsCorrectApartment(This, apt);
if (hr != S_OK)
{
ERR("called from wrong apartment, should have been 0x%s\n",
wine_dbgstr_longlong(This->oxid));
if (apt) apartment_release(apt);
return RPC_E_WRONG_THREAD;
}
if (FAILED(hr = com_get_tlsdata(&tlsdata)))
return hr;
/* This situation should be impossible in multi-threaded apartments,
* because the calling thread isn't re-enterable.
* Note: doing a COM call during the processing of a sent message is
* only disallowed if a client call is already being waited for
* completion */
if (!apt->multi_threaded &&
tlsdata->pending_call_count_client &&
InSendMessage())
{
ERR("can't make an outgoing COM call in response to a sent message\n");
apartment_release(apt);
return RPC_E_CANTCALLOUT_ININPUTSYNCCALL;
}
message_state = msg->Handle;
/* restore the binding handle and the real start of data */
msg->Handle = message_state->binding_handle;
msg->Buffer = (char *)msg->Buffer - message_state->prefix_data_len;
msg->BufferLength += message_state->prefix_data_len;
/* Note: this is an optimization in the Microsoft OLE runtime that we need
* to copy, as shown by the test_no_couninitialize_client test. without
* short-circuiting the RPC runtime in the case below, the test will
* deadlock on the loader lock due to the RPC runtime needing to create
* a thread to process the RPC when this function is called indirectly
* from DllMain */
message_state->params.msg = olemsg;
if (message_state->params.bypass_rpcrt)
{
TRACE("Calling apartment thread 0x%08x...\n", message_state->target_tid);
msg->ProcNum &= ~RPC_FLAGS_VALID_BIT;
if (!PostMessageW(message_state->target_hwnd, DM_EXECUTERPC, 0,
(LPARAM)&message_state->params))
{
ERR("PostMessage failed with error %u\n", GetLastError());
/* Note: message_state->params.iface doesn't have a reference and
* so doesn't need to be released */
hr = HRESULT_FROM_WIN32(GetLastError());
}
}
else
{
/* we use a separate thread here because we need to be able to
* pump the message loop in the application thread: if we do not,
* any windows created by this thread will hang and RPCs that try
* and re-enter this STA from an incoming server thread will
* deadlock. InstallShield is an example of that.
*/
if (!QueueUserWorkItem(rpc_sendreceive_thread, &message_state->params, WT_EXECUTEDEFAULT))
{
ERR("QueueUserWorkItem failed with error %u\n", GetLastError());
hr = E_UNEXPECTED;
}
else
hr = S_OK;
}
if (hr == S_OK)
{
if (WaitForSingleObject(message_state->params.handle, 0))
{
tlsdata->pending_call_count_client++;
hr = CoWaitForMultipleHandles(0, INFINITE, 1, &message_state->params.handle, &index);
tlsdata->pending_call_count_client--;
}
}
ClientRpcChannelBuffer_ReleaseEventHandle(This, message_state->params.handle);
/* for WM shortcut, faults are returned in params->hr */
if (hr == S_OK)
hrFault = message_state->params.hr;
status = message_state->params.status;
orpcthat.flags = ORPCF_NULL;
orpcthat.extensions = NULL;
TRACE("RPC call status: 0x%x\n", status);
if (status != RPC_S_OK)
hr = HRESULT_FROM_WIN32(status);
TRACE("hrFault = 0x%08x\n", hrFault);
/* FIXME: this condition should be
* "hr == S_OK && (!hrFault || msg->BufferLength > FIELD_OFFSET(ORPCTHAT, extensions) + 4)"
* but we don't currently reset the message length for PostMessage
* dispatched calls */
if (hr == S_OK && hrFault == S_OK)
{
HRESULT hr2;
char *original_buffer = msg->Buffer;
/* handle ORPCTHAT and client extensions */
hr2 = unmarshal_ORPCTHAT(msg, &orpcthat, &orpc_ext_array, &first_wire_orpc_extent);
if (FAILED(hr2))
hr = hr2;
message_state->prefix_data_len = (char *)msg->Buffer - original_buffer;
msg->BufferLength -= message_state->prefix_data_len;
}
else
message_state->prefix_data_len = 0;
if (hr == S_OK)
{
ChannelHooks_ClientNotify(&message_state->channel_hook_info,
msg->DataRepresentation,
first_wire_orpc_extent,
orpcthat.extensions && first_wire_orpc_extent ? orpcthat.extensions->size : 0,
hrFault);
}
/* save away the message state again */
msg->Handle = message_state;
if (pstatus) *pstatus = status;
if (hr == S_OK)
hr = hrFault;
TRACE("-- 0x%08x\n", hr);
apartment_release(apt);
return hr;
}
static HRESULT WINAPI ServerRpcChannelBuffer_FreeBuffer(LPRPCCHANNELBUFFER iface, RPCOLEMESSAGE* olemsg)
{
RPC_MESSAGE *msg = (RPC_MESSAGE *)olemsg;
RPC_STATUS status;
struct message_state *message_state;
TRACE("(%p)\n", msg);
message_state = msg->Handle;
/* restore the binding handle and the real start of data */
msg->Handle = message_state->binding_handle;
msg->Buffer = (char *)msg->Buffer - message_state->prefix_data_len;
msg->BufferLength += message_state->prefix_data_len;
message_state->prefix_data_len = 0;
if (message_state->bypass_rpcrt)
{
HeapFree(GetProcessHeap(), 0, msg->Buffer);
status = RPC_S_OK;
}
else
status = I_RpcFreeBuffer(msg);
msg->Handle = message_state;
TRACE("-- %d\n", status);
return HRESULT_FROM_WIN32(status);
}
static HRESULT WINAPI ClientRpcChannelBuffer_FreeBuffer(LPRPCCHANNELBUFFER iface, RPCOLEMESSAGE* olemsg)
{
RPC_MESSAGE *msg = (RPC_MESSAGE *)olemsg;
RPC_STATUS status;
struct message_state *message_state;
TRACE("(%p)\n", msg);
message_state = msg->Handle;
/* restore the binding handle and the real start of data */
msg->Handle = message_state->binding_handle;
msg->Buffer = (char *)msg->Buffer - message_state->prefix_data_len;
msg->BufferLength += message_state->prefix_data_len;
if (message_state->params.bypass_rpcrt)
{
HeapFree(GetProcessHeap(), 0, msg->Buffer);
status = RPC_S_OK;
}
else
status = I_RpcFreeBuffer(msg);
HeapFree(GetProcessHeap(), 0, msg->RpcInterfaceInformation);
msg->RpcInterfaceInformation = NULL;
if (message_state->params.stub)
IRpcStubBuffer_Release(message_state->params.stub);
if (message_state->params.chan)
IRpcChannelBuffer_Release(message_state->params.chan);
HeapFree(GetProcessHeap(), 0, message_state);
TRACE("-- %d\n", status);
return HRESULT_FROM_WIN32(status);
}
static HRESULT WINAPI ClientRpcChannelBuffer_GetDestCtx(LPRPCCHANNELBUFFER iface, DWORD* pdwDestContext, void** ppvDestContext)
{
ClientRpcChannelBuffer *This = (ClientRpcChannelBuffer *)iface;
TRACE("(%p,%p)\n", pdwDestContext, ppvDestContext);
*pdwDestContext = This->super.dest_context;
*ppvDestContext = This->super.dest_context_data;
return S_OK;
}
static HRESULT WINAPI ServerRpcChannelBuffer_GetDestCtx(LPRPCCHANNELBUFFER iface, DWORD* dest_context, void** dest_context_data)
{
RpcChannelBuffer *This = (RpcChannelBuffer *)iface;
TRACE("(%p,%p)\n", dest_context, dest_context_data);
*dest_context = This->dest_context;
*dest_context_data = This->dest_context_data;
return S_OK;
}
static HRESULT WINAPI RpcChannelBuffer_IsConnected(LPRPCCHANNELBUFFER iface)
{
TRACE("()\n");
/* native does nothing too */
return S_OK;
}
static const IRpcChannelBufferVtbl ClientRpcChannelBufferVtbl =
{
RpcChannelBuffer_QueryInterface,
RpcChannelBuffer_AddRef,
ClientRpcChannelBuffer_Release,
ClientRpcChannelBuffer_GetBuffer,
ClientRpcChannelBuffer_SendReceive,
ClientRpcChannelBuffer_FreeBuffer,
ClientRpcChannelBuffer_GetDestCtx,
RpcChannelBuffer_IsConnected
};
static const IRpcChannelBufferVtbl ServerRpcChannelBufferVtbl =
{
RpcChannelBuffer_QueryInterface,
RpcChannelBuffer_AddRef,
ServerRpcChannelBuffer_Release,
ServerRpcChannelBuffer_GetBuffer,
ServerRpcChannelBuffer_SendReceive,
ServerRpcChannelBuffer_FreeBuffer,
ServerRpcChannelBuffer_GetDestCtx,
RpcChannelBuffer_IsConnected
};
/* returns a channel buffer for proxies */
HRESULT rpc_create_clientchannel(const OXID *oxid, const IPID *ipid,
const OXID_INFO *oxid_info, const IID *iid,
DWORD dest_context, void *dest_context_data,
IRpcChannelBuffer **chan, struct apartment *apt)
{
ClientRpcChannelBuffer *This;
WCHAR endpoint[200];
RPC_BINDING_HANDLE bind;
RPC_STATUS status;
LPWSTR string_binding;
/* FIXME: get the endpoint from oxid_info->psa instead */
get_rpc_endpoint(endpoint, oxid);
TRACE("proxy pipe: connecting to endpoint: %s\n", debugstr_w(endpoint));
status = RpcStringBindingComposeW(
NULL,
rpctransportW,
NULL,
endpoint,
NULL,
&string_binding);
if (status == RPC_S_OK)
{
status = RpcBindingFromStringBindingW(string_binding, &bind);
if (status == RPC_S_OK)
{
IPID ipid2 = *ipid; /* why can't RpcBindingSetObject take a const? */
status = RpcBindingSetObject(bind, &ipid2);
if (status != RPC_S_OK)
RpcBindingFree(&bind);
}
RpcStringFreeW(&string_binding);
}
if (status != RPC_S_OK)
{
ERR("Couldn't get binding for endpoint %s, status = %d\n", debugstr_w(endpoint), status);
return HRESULT_FROM_WIN32(status);
}
This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
if (!This)
{
RpcBindingFree(&bind);
return E_OUTOFMEMORY;
}
This->super.IRpcChannelBuffer_iface.lpVtbl = &ClientRpcChannelBufferVtbl;
This->super.refs = 1;
This->super.dest_context = dest_context;
This->super.dest_context_data = dest_context_data;
This->bind = bind;
This->oxid = apartment_getoxid(apt);
This->server_pid = oxid_info->dwPid;
This->event = NULL;
This->iid = *iid;
*chan = &This->super.IRpcChannelBuffer_iface;
return S_OK;
}
HRESULT rpc_create_serverchannel(DWORD dest_context, void *dest_context_data, IRpcChannelBuffer **chan)
{
RpcChannelBuffer *This = HeapAlloc(GetProcessHeap(), 0, sizeof(*This));
if (!This)
return E_OUTOFMEMORY;
This->IRpcChannelBuffer_iface.lpVtbl = &ServerRpcChannelBufferVtbl;
This->refs = 1;
This->dest_context = dest_context;
This->dest_context_data = dest_context_data;
*chan = &This->IRpcChannelBuffer_iface;
return S_OK;
}
/* unmarshals ORPC_EXTENT_ARRAY according to NDR rules, but doesn't allocate
* any memory */
static HRESULT unmarshal_ORPC_EXTENT_ARRAY(RPC_MESSAGE *msg, const char *end,
ORPC_EXTENT_ARRAY *extensions,
WIRE_ORPC_EXTENT **first_wire_orpc_extent)
{
DWORD pointer_id;
DWORD i;
memcpy(extensions, msg->Buffer, FIELD_OFFSET(WIRE_ORPC_EXTENT_ARRAY, extent));
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPC_EXTENT_ARRAY, extent);
if ((const char *)msg->Buffer + 2 * sizeof(DWORD) > end)
return RPC_E_INVALID_HEADER;
pointer_id = *(DWORD *)msg->Buffer;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
extensions->extent = NULL;
if (pointer_id)
{
WIRE_ORPC_EXTENT *wire_orpc_extent;
/* conformance */
if (*(DWORD *)msg->Buffer != ((extensions->size+1)&~1))
return RPC_S_INVALID_BOUND;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
/* arbitrary limit for security (don't know what native does) */
if (extensions->size > 256)
{
ERR("too many extensions: %d\n", extensions->size);
return RPC_S_INVALID_BOUND;
}
*first_wire_orpc_extent = wire_orpc_extent = msg->Buffer;
for (i = 0; i < ((extensions->size+1)&~1); i++)
{
if ((const char *)&wire_orpc_extent->data[0] > end)
return RPC_S_INVALID_BOUND;
if (wire_orpc_extent->conformance != ((wire_orpc_extent->size+7)&~7))
return RPC_S_INVALID_BOUND;
if ((const char *)&wire_orpc_extent->data[wire_orpc_extent->conformance] > end)
return RPC_S_INVALID_BOUND;
TRACE("size %u, guid %s\n", wire_orpc_extent->size, debugstr_guid(&wire_orpc_extent->id));
wire_orpc_extent = (WIRE_ORPC_EXTENT *)&wire_orpc_extent->data[wire_orpc_extent->conformance];
}
msg->Buffer = wire_orpc_extent;
}
return S_OK;
}
/* unmarshals ORPCTHIS according to NDR rules, but doesn't allocate any memory */
static HRESULT unmarshal_ORPCTHIS(RPC_MESSAGE *msg, ORPCTHIS *orpcthis,
ORPC_EXTENT_ARRAY *orpc_ext_array, WIRE_ORPC_EXTENT **first_wire_orpc_extent)
{
const char *end = (char *)msg->Buffer + msg->BufferLength;
*first_wire_orpc_extent = NULL;
if (msg->BufferLength < FIELD_OFFSET(WIRE_ORPCTHIS, extensions) + sizeof(DWORD))
{
ERR("invalid buffer length\n");
return RPC_E_INVALID_HEADER;
}
memcpy(orpcthis, msg->Buffer, FIELD_OFFSET(WIRE_ORPCTHIS, extensions));
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPCTHIS, extensions);
if ((const char *)msg->Buffer + sizeof(DWORD) > end)
return RPC_E_INVALID_HEADER;
if (*(DWORD *)msg->Buffer)
orpcthis->extensions = orpc_ext_array;
else
orpcthis->extensions = NULL;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
if (orpcthis->extensions)
{
HRESULT hr = unmarshal_ORPC_EXTENT_ARRAY(msg, end, orpc_ext_array,
first_wire_orpc_extent);
if (FAILED(hr))
return hr;
}
if ((orpcthis->version.MajorVersion != COM_MAJOR_VERSION) ||
(orpcthis->version.MinorVersion > COM_MINOR_VERSION))
{
ERR("COM version {%d, %d} not supported\n",
orpcthis->version.MajorVersion, orpcthis->version.MinorVersion);
return RPC_E_VERSION_MISMATCH;
}
if (orpcthis->flags & ~(ORPCF_LOCAL|ORPCF_RESERVED1|ORPCF_RESERVED2|ORPCF_RESERVED3|ORPCF_RESERVED4))
{
ERR("invalid flags 0x%x\n", orpcthis->flags & ~(ORPCF_LOCAL|ORPCF_RESERVED1|ORPCF_RESERVED2|ORPCF_RESERVED3|ORPCF_RESERVED4));
return RPC_E_INVALID_HEADER;
}
return S_OK;
}
static HRESULT unmarshal_ORPCTHAT(RPC_MESSAGE *msg, ORPCTHAT *orpcthat,
ORPC_EXTENT_ARRAY *orpc_ext_array, WIRE_ORPC_EXTENT **first_wire_orpc_extent)
{
const char *end = (char *)msg->Buffer + msg->BufferLength;
*first_wire_orpc_extent = NULL;
if (msg->BufferLength < FIELD_OFFSET(WIRE_ORPCTHAT, extensions) + sizeof(DWORD))
{
ERR("invalid buffer length\n");
return RPC_E_INVALID_HEADER;
}
memcpy(orpcthat, msg->Buffer, FIELD_OFFSET(WIRE_ORPCTHAT, extensions));
msg->Buffer = (char *)msg->Buffer + FIELD_OFFSET(WIRE_ORPCTHAT, extensions);
if ((const char *)msg->Buffer + sizeof(DWORD) > end)
return RPC_E_INVALID_HEADER;
if (*(DWORD *)msg->Buffer)
orpcthat->extensions = orpc_ext_array;
else
orpcthat->extensions = NULL;
msg->Buffer = (char *)msg->Buffer + sizeof(DWORD);
if (orpcthat->extensions)
{
HRESULT hr = unmarshal_ORPC_EXTENT_ARRAY(msg, end, orpc_ext_array,
first_wire_orpc_extent);
if (FAILED(hr))
return hr;
}
if (orpcthat->flags & ~(ORPCF_LOCAL|ORPCF_RESERVED1|ORPCF_RESERVED2|ORPCF_RESERVED3|ORPCF_RESERVED4))
{
ERR("invalid flags 0x%x\n", orpcthat->flags & ~(ORPCF_LOCAL|ORPCF_RESERVED1|ORPCF_RESERVED2|ORPCF_RESERVED3|ORPCF_RESERVED4));
return RPC_E_INVALID_HEADER;
}
return S_OK;
}
void rpc_execute_call(struct dispatch_params *params)
{
struct message_state *message_state = NULL;
RPC_MESSAGE *msg = (RPC_MESSAGE *)params->msg;
char *original_buffer = msg->Buffer;
ORPCTHIS orpcthis;
ORPC_EXTENT_ARRAY orpc_ext_array;
WIRE_ORPC_EXTENT *first_wire_orpc_extent;
GUID old_causality_id;
struct tlsdata *tlsdata;
struct apartment *apt;
if (FAILED(com_get_tlsdata(&tlsdata)))
return;
apt = com_get_current_apt();
/* handle ORPCTHIS and server extensions */
params->hr = unmarshal_ORPCTHIS(msg, &orpcthis, &orpc_ext_array, &first_wire_orpc_extent);
if (params->hr != S_OK)
{
msg->Buffer = original_buffer;
goto exit;
}
message_state = HeapAlloc(GetProcessHeap(), 0, sizeof(*message_state));
if (!message_state)
{
params->hr = E_OUTOFMEMORY;
msg->Buffer = original_buffer;
goto exit;
}
message_state->prefix_data_len = (char *)msg->Buffer - original_buffer;
message_state->binding_handle = msg->Handle;
message_state->bypass_rpcrt = params->bypass_rpcrt;
message_state->channel_hook_info.iid = params->iid;
message_state->channel_hook_info.cbSize = sizeof(message_state->channel_hook_info);
message_state->channel_hook_info.uCausality = orpcthis.cid;
message_state->channel_hook_info.dwServerPid = GetCurrentProcessId();
message_state->channel_hook_info.iMethod = msg->ProcNum;
message_state->channel_hook_info.pObject = params->iface;
if (orpcthis.extensions && first_wire_orpc_extent &&
orpcthis.extensions->size)
ChannelHooks_ServerNotify(&message_state->channel_hook_info, msg->DataRepresentation, first_wire_orpc_extent, orpcthis.extensions->size);
msg->Handle = message_state;
msg->BufferLength -= message_state->prefix_data_len;
/* call message filter */
if (apt->filter)
{
DWORD handlecall;
INTERFACEINFO interface_info;
CALLTYPE calltype;
interface_info.pUnk = params->iface;
interface_info.iid = params->iid;
interface_info.wMethod = msg->ProcNum;
if (IsEqualGUID(&orpcthis.cid, &tlsdata->causality_id))
calltype = CALLTYPE_NESTED;
else if (tlsdata->pending_call_count_server == 0)
calltype = CALLTYPE_TOPLEVEL;
else
calltype = CALLTYPE_TOPLEVEL_CALLPENDING;
handlecall = IMessageFilter_HandleInComingCall(apt->filter,
calltype,
UlongToHandle(GetCurrentProcessId()),
0 /* FIXME */,
&interface_info);
TRACE("IMessageFilter_HandleInComingCall returned %d\n", handlecall);
switch (handlecall)
{
case SERVERCALL_REJECTED:
params->hr = RPC_E_CALL_REJECTED;
goto exit_reset_state;
case SERVERCALL_RETRYLATER:
#if 0 /* FIXME: handle retries on the client side before enabling this code */
params->hr = RPC_E_RETRY;
goto exit_reset_state;
#else
FIXME("retry call later not implemented\n");
break;
#endif
case SERVERCALL_ISHANDLED:
default:
break;
}
}
/* invoke the method */
/* save the old causality ID - note: any calls executed while processing
* messages received during the SendReceive will appear to originate from
* this call - this should be checked with what Windows does */
old_causality_id = tlsdata->causality_id;
tlsdata->causality_id = orpcthis.cid;
tlsdata->pending_call_count_server++;
params->hr = IRpcStubBuffer_Invoke(params->stub, params->msg, params->chan);
tlsdata->pending_call_count_server--;
tlsdata->causality_id = old_causality_id;
/* the invoke allocated a new buffer, so free the old one */
if (message_state->bypass_rpcrt && original_buffer != msg->Buffer)
HeapFree(GetProcessHeap(), 0, original_buffer);
exit_reset_state:
message_state = msg->Handle;
msg->Handle = message_state->binding_handle;
msg->Buffer = (char *)msg->Buffer - message_state->prefix_data_len;
msg->BufferLength += message_state->prefix_data_len;
exit:
HeapFree(GetProcessHeap(), 0, message_state);
if (params->handle) SetEvent(params->handle);
}
static void __RPC_STUB dispatch_rpc(RPC_MESSAGE *msg)
{
struct dispatch_params *params;
struct stub_manager *stub_manager;
struct apartment *apt;
IPID ipid;
HRESULT hr;
RpcBindingInqObject(msg->Handle, &ipid);
TRACE("ipid = %s, iMethod = %d\n", debugstr_guid(&ipid), msg->ProcNum);
params = HeapAlloc(GetProcessHeap(), 0, sizeof(*params));
if (!params)
{
RpcRaiseException(E_OUTOFMEMORY);
return;
}
hr = ipid_get_dispatch_params(&ipid, &apt, &stub_manager, &params->stub, &params->chan,
&params->iid, &params->iface);
if (hr != S_OK)
{
ERR("no apartment found for ipid %s\n", debugstr_guid(&ipid));
HeapFree(GetProcessHeap(), 0, params);
RpcRaiseException(hr);
return;
}
params->msg = (RPCOLEMESSAGE *)msg;
params->status = RPC_S_OK;
params->hr = S_OK;
params->handle = NULL;
params->bypass_rpcrt = FALSE;
/* 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->multi_threaded)
{
params->handle = CreateEventW(NULL, FALSE, FALSE, NULL);
TRACE("Calling apartment thread 0x%08x...\n", apt->tid);
if (PostMessageW(apartment_getwindow(apt), DM_EXECUTERPC, 0, (LPARAM)params))
WaitForSingleObject(params->handle, INFINITE);
else
{
ERR("PostMessage failed with error %u\n", GetLastError());
IRpcChannelBuffer_Release(params->chan);
IRpcStubBuffer_Release(params->stub);
}
CloseHandle(params->handle);
}
else
{
BOOL joined = FALSE;
struct tlsdata *tlsdata;
com_get_tlsdata(&tlsdata);
if (!tlsdata->apt)
{
enter_apartment(tlsdata, COINIT_MULTITHREADED);
joined = TRUE;
}
rpc_execute_call(params);
if (joined)
{
leave_apartment(tlsdata);
}
}
hr = params->hr;
if (params->chan)
IRpcChannelBuffer_Release(params->chan);
if (params->stub)
IRpcStubBuffer_Release(params->stub);
HeapFree(GetProcessHeap(), 0, params);
stub_manager_int_release(stub_manager);
apartment_release(apt);
/* if IRpcStubBuffer_Invoke fails, we should raise an exception to tell
* the RPC runtime that the call failed */
if (hr != S_OK) RpcRaiseException(hr);
}
/* stub registration */
HRESULT rpc_register_interface(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 %d\n", status);
HeapFree(GetProcessHeap(), 0, rif);
hr = HRESULT_FROM_WIN32(status);
}
}
else
hr = E_OUTOFMEMORY;
}
LeaveCriticalSection(&csRegIf);
return hr;
}
/* stub unregistration */
void rpc_unregister_interface(REFIID riid, BOOL wait)
{
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)
{
RpcServerUnregisterIf((RPC_IF_HANDLE)&rif->If, NULL, wait);
list_remove(&rif->entry);
HeapFree(GetProcessHeap(), 0, rif);
}
break;
}
}
LeaveCriticalSection(&csRegIf);
}
/* get the info for an OXID, including the IPID for the rem unknown interface
* and the string binding */
HRESULT rpc_resolve_oxid(OXID oxid, OXID_INFO *oxid_info)
{
TRACE("%s\n", wine_dbgstr_longlong(oxid));
oxid_info->dwTid = 0;
oxid_info->dwPid = 0;
oxid_info->dwAuthnHint = RPC_C_AUTHN_LEVEL_NONE;
/* FIXME: this is a hack around not having an OXID resolver yet -
* this function should contact the machine's OXID resolver and then it
* should give us the IPID of the IRemUnknown interface */
oxid_info->ipidRemUnknown.Data1 = 0xffffffff;
oxid_info->ipidRemUnknown.Data2 = 0xffff;
oxid_info->ipidRemUnknown.Data3 = 0xffff;
memcpy(oxid_info->ipidRemUnknown.Data4, &oxid, sizeof(OXID));
oxid_info->psa = NULL /* FIXME */;
return S_OK;
}
/* make the apartment reachable by other threads and processes and create the
* IRemUnknown object */
void rpc_start_remoting(struct apartment *apt)
{
if (!InterlockedExchange(&apt->remoting_started, TRUE))
{
WCHAR endpoint[200];
RPC_STATUS status;
get_rpc_endpoint(endpoint, &apt->oxid);
status = RpcServerUseProtseqEpW(
rpctransportW,
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(apt);
}
/******************************************************************************
* DllDebugObjectRPCHook (combase.@)
*/
BOOL WINAPI DllDebugObjectRPCHook(BOOL trace, /* ORPC_INIT_ARGS * */ void *args)
{
FIXME("%d, %p: stub\n", trace, args);
return TRUE;
}
Reference in a new issue View git blame Copy permalink