FreeRDP/libfreerdp/common/addin.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Addin Loader
*
* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winpr/crt.h>
#include <winpr/path.h>
#include <winpr/library.h>
#include <freerdp/addin.h>
LPSTR freerdp_get_library_install_path()
{
LPSTR pszPath;
size_t cchPath;
size_t cchLibraryPath;
size_t cchInstallPrefix;
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LPCSTR pszLibraryPath = FREERDP_LIBRARY_PATH;
LPCSTR pszInstallPrefix = FREERDP_INSTALL_PREFIX;
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cchLibraryPath = strlen(pszLibraryPath);
cchInstallPrefix = strlen(pszInstallPrefix);
cchPath = cchInstallPrefix + cchLibraryPath + 2;
pszPath = (LPSTR) malloc(cchPath + 1);
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CopyMemory(pszPath, pszInstallPrefix, cchInstallPrefix);
pszPath[cchInstallPrefix] = '\0';
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NativePathCchAppendA(pszPath, cchPath + 1, pszLibraryPath);
return pszPath;
}
LPSTR freerdp_get_dynamic_addin_install_path()
{
LPSTR pszPath;
size_t cchPath;
size_t cchAddinPath;
size_t cchInstallPrefix;
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LPCSTR pszAddinPath = FREERDP_ADDIN_PATH;
LPCSTR pszInstallPrefix = FREERDP_INSTALL_PREFIX;
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cchAddinPath = strlen(pszAddinPath);
cchInstallPrefix = strlen(pszInstallPrefix);
cchPath = cchInstallPrefix + cchAddinPath + 2;
pszPath = (LPSTR) malloc(cchPath + 1);
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CopyMemory(pszPath, pszInstallPrefix, cchInstallPrefix);
pszPath[cchInstallPrefix] = '\0';
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NativePathCchAppendA(pszPath, cchPath + 1, pszAddinPath);
return pszPath;
}
void* freerdp_load_dynamic_addin(LPCSTR pszFileName, LPCSTR pszPath, LPCSTR pszEntryName)
{
void* entry;
BOOL bHasExt;
PCSTR pszExt;
size_t cchExt;
HINSTANCE library;
size_t cchFileName;
LPSTR pszFilePath;
size_t cchFilePath;
LPSTR pszAddinFile;
size_t cchAddinFile;
LPSTR pszAddinInstallPath;
size_t cchAddinInstallPath;
entry = NULL;
cchExt = 0;
bHasExt = TRUE;
cchFileName = strlen(pszFileName);
if (PathCchFindExtensionA(pszFileName, cchFileName + 1, &pszExt) != S_OK)
{
pszExt = PathGetSharedLibraryExtensionA(PATH_SHARED_LIB_EXT_WITH_DOT);
cchExt = strlen(pszExt);
bHasExt = FALSE;
}
pszAddinInstallPath = freerdp_get_dynamic_addin_install_path();
cchAddinInstallPath = strlen(pszAddinInstallPath);
cchFilePath = cchAddinInstallPath + cchFileName + 32;
pszFilePath = (LPSTR) malloc(cchFilePath + 1);
if (bHasExt)
{
pszAddinFile = _strdup(pszFileName);
cchAddinFile = strlen(pszAddinFile);
}
else
{
cchAddinFile = cchFileName + cchExt + 2;
pszAddinFile = (LPSTR) malloc(cchAddinFile + 1);
sprintf_s(pszAddinFile, cchAddinFile, "%s%s", pszFileName, pszExt);
cchAddinFile = strlen(pszAddinFile);
}
CopyMemory(pszFilePath, pszAddinInstallPath, cchAddinInstallPath);
pszFilePath[cchAddinInstallPath] = '\0';
NativePathCchAppendA((LPSTR) pszFilePath, cchFilePath + 1, pszAddinFile);
library = LoadLibraryA(pszFilePath);
free(pszAddinInstallPath);
free(pszAddinFile);
free(pszFilePath);
if (!library)
return NULL;
entry = GetProcAddress(library, pszEntryName);
if (entry)
return entry;
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FreeLibrary(library);
return entry;
}
void* freerdp_load_dynamic_channel_addin_entry(LPCSTR pszName, LPSTR pszSubsystem, LPSTR pszType, DWORD dwFlags)
{
void* entry;
LPSTR pszFileName;
size_t cchFileName;
LPCSTR pszExtension;
pszExtension = PathGetSharedLibraryExtensionA(0);
if (pszName && pszSubsystem && pszType)
{
cchFileName = strlen(pszName) + strlen(pszSubsystem) + strlen(pszType) + strlen(pszExtension) + 32;
pszFileName = (LPSTR) malloc(cchFileName);
sprintf_s(pszFileName, cchFileName, "%s-client-%s-%s.%s", pszName, pszSubsystem, pszType, pszExtension);
cchFileName = strlen(pszFileName);
}
else if (pszName && pszSubsystem)
{
cchFileName = strlen(pszName) + strlen(pszSubsystem) + strlen(pszExtension) + 32;
pszFileName = (LPSTR) malloc(cchFileName);
sprintf_s(pszFileName, cchFileName, "%s-client-%s.%s", pszName, pszSubsystem, pszExtension);
cchFileName = strlen(pszFileName);
}
else if (pszName)
{
cchFileName = strlen(pszName) + strlen(pszExtension) + 32;
pszFileName = (LPSTR) malloc(cchFileName);
sprintf_s(pszFileName, cchFileName, "%s-client.%s", pszName, pszExtension);
cchFileName = strlen(pszFileName);
}
else
{
return NULL;
}
if (pszSubsystem)
{
LPSTR pszEntryName;
size_t cchEntryName;
/* subsystem add-in */
cchEntryName = 64 + strlen(pszName);
pszEntryName = (LPSTR) malloc(cchEntryName + 1);
sprintf_s(pszEntryName, cchEntryName + 1, "freerdp_%s_client_subsystem_entry", pszName);
entry = freerdp_load_dynamic_addin(pszFileName, NULL, pszEntryName);
free(pszEntryName);
free(pszFileName);
if (entry)
return entry;
}
else
{
/* channel add-in */
if (dwFlags & FREERDP_ADDIN_CHANNEL_STATIC)
entry = freerdp_load_dynamic_addin(pszFileName, NULL, "VirtualChannelEntry");
else if (dwFlags & FREERDP_ADDIN_CHANNEL_DYNAMIC)
entry = freerdp_load_dynamic_addin(pszFileName, NULL, "DVCPluginEntry");
else if (dwFlags & FREERDP_ADDIN_CHANNEL_DEVICE)
entry = freerdp_load_dynamic_addin(pszFileName, NULL, "DeviceServiceEntry");
else
entry = freerdp_load_dynamic_addin(pszFileName, NULL, pszType);
free(pszFileName);
if (entry)
return entry;
}
return NULL;
}
static FREERDP_LOAD_CHANNEL_ADDIN_ENTRY_FN freerdp_load_static_channel_addin_entry = NULL;
int freerdp_register_addin_provider(FREERDP_LOAD_CHANNEL_ADDIN_ENTRY_FN provider, DWORD dwFlags)
{
freerdp_load_static_channel_addin_entry = provider;
return 0;
}
void* freerdp_load_channel_addin_entry(LPCSTR pszName, LPSTR pszSubsystem, LPSTR pszType, DWORD dwFlags)
{
void* entry = NULL;
if (freerdp_load_static_channel_addin_entry)
entry = freerdp_load_static_channel_addin_entry(pszName, pszSubsystem, pszType, dwFlags);
if (!entry)
entry = freerdp_load_dynamic_channel_addin_entry(pszName, pszSubsystem, pszType, dwFlags);
return entry;
}