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authorBernhard Schmidt <berni@debian.org>2020-08-15 21:29:50 +0200
committerBernhard Schmidt <berni@debian.org>2020-08-15 21:29:50 +0200
commit1079962e4c06f88a54e50d997c1b7e84303d30b4 (patch)
tree4d019426928435425214ccedd6f89b70dbdf035d /src/openvpnmsica/openvpnmsica.c
parent620785fe268a1221c1ba7a9cb5a70f3140a4f1ca (diff)
New upstream version 2.5~beta1upstream/2.5_beta1
Diffstat (limited to 'src/openvpnmsica/openvpnmsica.c')
-rw-r--r--src/openvpnmsica/openvpnmsica.c1215
1 files changed, 1215 insertions, 0 deletions
diff --git a/src/openvpnmsica/openvpnmsica.c b/src/openvpnmsica/openvpnmsica.c
new file mode 100644
index 0000000..31e90bd
--- /dev/null
+++ b/src/openvpnmsica/openvpnmsica.c
@@ -0,0 +1,1215 @@
+/*
+ * openvpnmsica -- Custom Action DLL to provide OpenVPN-specific support to MSI packages
+ * https://community.openvpn.net/openvpn/wiki/OpenVPNMSICA
+ *
+ * Copyright (C) 2018-2020 Simon Rozman <simon@rozman.si>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#elif defined(_MSC_VER)
+#include <config-msvc.h>
+#endif
+#include <winsock2.h> /* Must be included _before_ <windows.h> */
+
+#include "openvpnmsica.h"
+#include "msica_arg.h"
+#include "msiex.h"
+
+#include "../tapctl/basic.h"
+#include "../tapctl/error.h"
+#include "../tapctl/tap.h"
+
+#include <windows.h>
+#include <iphlpapi.h>
+#include <malloc.h>
+#include <memory.h>
+#include <msiquery.h>
+#include <shellapi.h>
+#include <shlwapi.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <tchar.h>
+
+#ifdef _MSC_VER
+#pragma comment(lib, "advapi32.lib")
+#pragma comment(lib, "iphlpapi.lib")
+#pragma comment(lib, "shell32.lib")
+#pragma comment(lib, "shlwapi.lib")
+#pragma comment(lib, "version.lib")
+#endif
+
+
+/**
+ * Local constants
+ */
+
+#define MSICA_ADAPTER_TICK_SIZE (16*1024) /** Amount of tick space to reserve for one TAP/TUN adapter creation/deletition. */
+
+
+/**
+ * Joins an argument sequence and sets it to the MSI property.
+ *
+ * @param hInstall Handle to the installation provided to the DLL custom action
+ *
+ * @param szProperty MSI property name to set to the joined argument sequence.
+ *
+ * @param seq The argument sequence.
+ *
+ * @return ERROR_SUCCESS on success; An error code otherwise
+ */
+static UINT
+setup_sequence(
+ _In_ MSIHANDLE hInstall,
+ _In_z_ LPCTSTR szProperty,
+ _In_ struct msica_arg_seq *seq)
+{
+ UINT uiResult;
+ LPTSTR szSequence = msica_arg_seq_join(seq);
+ uiResult = MsiSetProperty(hInstall, szProperty, szSequence);
+ free(szSequence);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiSetProperty() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiSetProperty(\"%" PRIsLPTSTR "\") failed", __FUNCTION__, szProperty);
+ return uiResult;
+ }
+ return ERROR_SUCCESS;
+}
+
+
+#ifdef _DEBUG
+
+/**
+ * Pops up a message box creating a time window to attach a debugger to the installer process in
+ * order to debug custom actions.
+ *
+ * @param szFunctionName Function name that triggered the pop-up. Displayed in message box's
+ * title.
+ */
+static void
+_debug_popup(_In_z_ LPCTSTR szFunctionName)
+{
+ TCHAR szTitle[0x100], szMessage[0x100+MAX_PATH], szProcessPath[MAX_PATH];
+
+ /* Compose pop-up title. The dialog title will contain function name to ease the process
+ * locating. Mind that Visual Studio displays window titles on the process list. */
+ _stprintf_s(szTitle, _countof(szTitle), TEXT("%s v%s"), szFunctionName, TEXT(PACKAGE_VERSION));
+
+ /* Get process name. */
+ GetModuleFileName(NULL, szProcessPath, _countof(szProcessPath));
+ LPCTSTR szProcessName = _tcsrchr(szProcessPath, TEXT('\\'));
+ szProcessName = szProcessName ? szProcessName + 1 : szProcessPath;
+
+ /* Compose the pop-up message. */
+ _stprintf_s(
+ szMessage, _countof(szMessage),
+ TEXT("The %s process (PID: %u) has started to execute the %s custom action.\r\n")
+ TEXT("\r\n")
+ TEXT("If you would like to debug the custom action, attach a debugger to this process and set breakpoints before dismissing this dialog.\r\n")
+ TEXT("\r\n")
+ TEXT("If you are not debugging this custom action, you can safely ignore this message."),
+ szProcessName,
+ GetCurrentProcessId(),
+ szFunctionName);
+
+ MessageBox(NULL, szMessage, szTitle, MB_OK);
+}
+
+#define debug_popup(f) _debug_popup(f)
+#else /* ifdef _DEBUG */
+#define debug_popup(f)
+#endif /* ifdef _DEBUG */
+
+
+/**
+ * Detects if the OpenVPNService service is in use (running or paused) and sets
+ * OPENVPNSERVICE to the service process PID, or its path if it is set to
+ * auto-start, but not running.
+ *
+ * @param hInstall Handle to the installation provided to the DLL custom action
+ *
+ * @return ERROR_SUCCESS on success; An error code otherwise
+ * See: https://msdn.microsoft.com/en-us/library/windows/desktop/aa368072.aspx
+ */
+static UINT
+set_openvpnserv_state(_In_ MSIHANDLE hInstall)
+{
+ UINT uiResult;
+
+ /* Get Service Control Manager handle. */
+ SC_HANDLE hSCManager = OpenSCManager(NULL, SERVICES_ACTIVE_DATABASE, SC_MANAGER_CONNECT);
+ if (hSCManager == NULL)
+ {
+ uiResult = GetLastError();
+ msg(M_NONFATAL | M_ERRNO, "%s: OpenSCManager() failed", __FUNCTION__);
+ return uiResult;
+ }
+
+ /* Get OpenVPNService service handle. */
+ SC_HANDLE hService = OpenService(hSCManager, TEXT("OpenVPNService"), SERVICE_QUERY_STATUS | SERVICE_QUERY_CONFIG);
+ if (hService == NULL)
+ {
+ uiResult = GetLastError();
+ if (uiResult == ERROR_SERVICE_DOES_NOT_EXIST)
+ {
+ /* This is not actually an error. */
+ goto cleanup_OpenSCManager;
+ }
+ msg(M_NONFATAL | M_ERRNO, "%s: OpenService(\"OpenVPNService\") failed", __FUNCTION__);
+ goto cleanup_OpenSCManager;
+ }
+
+ /* Query service status. */
+ SERVICE_STATUS_PROCESS ssp;
+ DWORD dwBufSize;
+ if (QueryServiceStatusEx(hService, SC_STATUS_PROCESS_INFO, (LPBYTE)&ssp, sizeof(ssp), &dwBufSize))
+ {
+ switch (ssp.dwCurrentState)
+ {
+ case SERVICE_START_PENDING:
+ case SERVICE_RUNNING:
+ case SERVICE_STOP_PENDING:
+ case SERVICE_PAUSE_PENDING:
+ case SERVICE_PAUSED:
+ case SERVICE_CONTINUE_PENDING:
+ {
+ /* Service is started (kind of). Set OPENVPNSERVICE property to service PID. */
+ TCHAR szPID[10 /*MAXDWORD in decimal*/ + 1 /*terminator*/];
+ _stprintf_s(
+ szPID, _countof(szPID),
+ TEXT("%u"),
+ ssp.dwProcessId);
+
+ uiResult = MsiSetProperty(hInstall, TEXT("OPENVPNSERVICE"), szPID);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiSetProperty() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiSetProperty(\"OPENVPNSERVICE\") failed", __FUNCTION__);
+ }
+
+ /* We know user is using the service. Skip auto-start setting check. */
+ goto cleanup_OpenService;
+ }
+ break;
+ }
+ }
+ else
+ {
+ uiResult = GetLastError();
+ msg(M_NONFATAL | M_ERRNO, "%s: QueryServiceStatusEx(\"OpenVPNService\") failed", __FUNCTION__);
+ }
+
+ /* Service is not started. Is it set to auto-start? */
+ /* MSDN describes the maximum buffer size for QueryServiceConfig() to be 8kB. */
+ /* This is small enough to fit on stack. */
+ BYTE _buffer_8k[8192];
+ LPQUERY_SERVICE_CONFIG pQsc = (LPQUERY_SERVICE_CONFIG)_buffer_8k;
+ dwBufSize = sizeof(_buffer_8k);
+ if (!QueryServiceConfig(hService, pQsc, dwBufSize, &dwBufSize))
+ {
+ uiResult = GetLastError();
+ msg(M_NONFATAL | M_ERRNO, "%s: QueryServiceStatusEx(\"QueryServiceConfig\") failed", __FUNCTION__);
+ goto cleanup_OpenService;
+ }
+
+ if (pQsc->dwStartType <= SERVICE_AUTO_START)
+ {
+ /* Service is set to auto-start. Set OPENVPNSERVICE property to its path. */
+ uiResult = MsiSetProperty(hInstall, TEXT("OPENVPNSERVICE"), pQsc->lpBinaryPathName);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiSetProperty() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiSetProperty(\"OPENVPNSERVICE\") failed", __FUNCTION__);
+ goto cleanup_OpenService;
+ }
+ }
+
+ uiResult = ERROR_SUCCESS;
+
+cleanup_OpenService:
+ CloseServiceHandle(hService);
+cleanup_OpenSCManager:
+ CloseServiceHandle(hSCManager);
+ return uiResult;
+}
+
+
+static UINT
+find_adapters(
+ _In_ MSIHANDLE hInstall,
+ _In_z_ LPCTSTR szzHardwareIDs,
+ _In_z_ LPCTSTR szAdaptersPropertyName,
+ _In_z_ LPCTSTR szActiveAdaptersPropertyName)
+{
+ UINT uiResult;
+
+ /* Get network adapters with given hardware ID. */
+ struct tap_adapter_node *pAdapterList = NULL;
+ uiResult = tap_list_adapters(NULL, szzHardwareIDs, &pAdapterList);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ return uiResult;
+ }
+ else if (pAdapterList == NULL)
+ {
+ /* No adapters - no fun. */
+ return ERROR_SUCCESS;
+ }
+
+ /* Get IPv4/v6 info for all network adapters. Actually, we're interested in link status only: up/down? */
+ PIP_ADAPTER_ADDRESSES pAdapterAdresses = NULL;
+ ULONG ulAdapterAdressesSize = 16*1024;
+ for (size_t iteration = 0; iteration < 2; iteration++)
+ {
+ pAdapterAdresses = (PIP_ADAPTER_ADDRESSES)malloc(ulAdapterAdressesSize);
+ if (pAdapterAdresses == NULL)
+ {
+ msg(M_NONFATAL, "%s: malloc(%u) failed", __FUNCTION__, ulAdapterAdressesSize);
+ uiResult = ERROR_OUTOFMEMORY; goto cleanup_pAdapterList;
+ }
+
+ ULONG ulResult = GetAdaptersAddresses(
+ AF_UNSPEC,
+ GAA_FLAG_SKIP_UNICAST | GAA_FLAG_SKIP_ANYCAST | GAA_FLAG_SKIP_MULTICAST | GAA_FLAG_SKIP_DNS_SERVER | GAA_FLAG_SKIP_FRIENDLY_NAME | GAA_FLAG_INCLUDE_ALL_INTERFACES,
+ NULL,
+ pAdapterAdresses,
+ &ulAdapterAdressesSize);
+
+ if (ulResult == ERROR_SUCCESS)
+ {
+ break;
+ }
+
+ free(pAdapterAdresses);
+ if (ulResult != ERROR_BUFFER_OVERFLOW)
+ {
+ SetLastError(ulResult); /* MSDN does not mention GetAdaptersAddresses() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: GetAdaptersAddresses() failed", __FUNCTION__);
+ uiResult = ulResult; goto cleanup_pAdapterList;
+ }
+ }
+
+ /* Count adapters. */
+ size_t adapter_count = 0;
+ for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter; pAdapter = pAdapter->pNext)
+ {
+ adapter_count++;
+ }
+
+ /* Prepare semicolon delimited list of TAP adapter ID(s) and active TAP adapter ID(s). */
+ LPTSTR
+ szAdapters = (LPTSTR)malloc(adapter_count * (38 /*GUID*/ + 1 /*separator/terminator*/) * sizeof(TCHAR)),
+ szAdaptersTail = szAdapters;
+ if (szAdapters == NULL)
+ {
+ msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, adapter_count * (38 /*GUID*/ + 1 /*separator/terminator*/) * sizeof(TCHAR));
+ uiResult = ERROR_OUTOFMEMORY; goto cleanup_pAdapterAdresses;
+ }
+
+ LPTSTR
+ szAdaptersActive = (LPTSTR)malloc(adapter_count * (38 /*GUID*/ + 1 /*separator/terminator*/) * sizeof(TCHAR)),
+ szAdaptersActiveTail = szAdaptersActive;
+ if (szAdaptersActive == NULL)
+ {
+ msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, adapter_count * (38 /*GUID*/ + 1 /*separator/terminator*/) * sizeof(TCHAR));
+ uiResult = ERROR_OUTOFMEMORY; goto cleanup_szAdapters;
+ }
+
+ for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter; pAdapter = pAdapter->pNext)
+ {
+ /* Convert adapter GUID to UTF-16 string. (LPOLESTR defaults to LPWSTR) */
+ LPOLESTR szAdapterId = NULL;
+ StringFromIID((REFIID)&pAdapter->guid, &szAdapterId);
+
+ /* Append to the list of TAP adapter ID(s). */
+ if (szAdapters < szAdaptersTail)
+ {
+ *(szAdaptersTail++) = TEXT(';');
+ }
+ memcpy(szAdaptersTail, szAdapterId, 38 * sizeof(TCHAR));
+ szAdaptersTail += 38;
+
+ /* If this adapter is active (connected), add it to the list of active TAP adapter ID(s). */
+ for (PIP_ADAPTER_ADDRESSES p = pAdapterAdresses; p; p = p->Next)
+ {
+ OLECHAR szId[38 /*GUID*/ + 1 /*terminator*/];
+ GUID guid;
+ if (MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, p->AdapterName, -1, szId, _countof(szId)) > 0
+ && SUCCEEDED(IIDFromString(szId, &guid))
+ && memcmp(&guid, &pAdapter->guid, sizeof(GUID)) == 0)
+ {
+ if (p->OperStatus == IfOperStatusUp)
+ {
+ /* This TAP adapter is active (connected). */
+ if (szAdaptersActive < szAdaptersActiveTail)
+ {
+ *(szAdaptersActiveTail++) = TEXT(';');
+ }
+ memcpy(szAdaptersActiveTail, szAdapterId, 38 * sizeof(TCHAR));
+ szAdaptersActiveTail += 38;
+ }
+ break;
+ }
+ }
+ CoTaskMemFree(szAdapterId);
+ }
+ szAdaptersTail [0] = 0;
+ szAdaptersActiveTail[0] = 0;
+
+ /* Set Installer properties. */
+ uiResult = MsiSetProperty(hInstall, szAdaptersPropertyName, szAdapters);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiSetProperty() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiSetProperty(\"%s\") failed", __FUNCTION__, szAdaptersPropertyName);
+ goto cleanup_szAdaptersActive;
+ }
+ uiResult = MsiSetProperty(hInstall, szActiveAdaptersPropertyName, szAdaptersActive);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiSetProperty() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiSetProperty(\"%s\") failed", __FUNCTION__, szActiveAdaptersPropertyName);
+ goto cleanup_szAdaptersActive;
+ }
+
+cleanup_szAdaptersActive:
+ free(szAdaptersActive);
+cleanup_szAdapters:
+ free(szAdapters);
+cleanup_pAdapterAdresses:
+ free(pAdapterAdresses);
+cleanup_pAdapterList:
+ tap_free_adapter_list(pAdapterList);
+ return uiResult;
+}
+
+
+UINT __stdcall
+FindSystemInfo(_In_ MSIHANDLE hInstall)
+{
+#ifdef _MSC_VER
+#pragma comment(linker, DLLEXP_EXPORT)
+#endif
+
+ debug_popup(TEXT(__FUNCTION__));
+
+ BOOL bIsCoInitialized = SUCCEEDED(CoInitialize(NULL));
+
+ OPENVPNMSICA_SAVE_MSI_SESSION(hInstall);
+
+ set_openvpnserv_state(hInstall);
+ find_adapters(
+ hInstall,
+ TEXT("root\\") TEXT(TAP_WIN_COMPONENT_ID) TEXT("\0") TEXT(TAP_WIN_COMPONENT_ID) TEXT("\0"),
+ TEXT("TAPWINDOWS6ADAPTERS"),
+ TEXT("ACTIVETAPWINDOWS6ADAPTERS"));
+ find_adapters(
+ hInstall,
+ TEXT("Wintun") TEXT("\0"),
+ TEXT("WINTUNADAPTERS"),
+ TEXT("ACTIVEWINTUNADAPTERS"));
+
+ if (bIsCoInitialized)
+ {
+ CoUninitialize();
+ }
+ return ERROR_SUCCESS;
+}
+
+
+UINT __stdcall
+CloseOpenVPNGUI(_In_ MSIHANDLE hInstall)
+{
+#ifdef _MSC_VER
+#pragma comment(linker, DLLEXP_EXPORT)
+#endif
+ UNREFERENCED_PARAMETER(hInstall); /* This CA is does not interact with MSI session (report errors, access properties, tables, etc.). */
+
+ debug_popup(TEXT(__FUNCTION__));
+
+ /* Find OpenVPN GUI window. */
+ HWND hWnd = FindWindow(TEXT("OpenVPN-GUI"), NULL);
+ if (hWnd)
+ {
+ /* Ask it to close and wait for 100ms. Unfortunately, this will succeed only for recent OpenVPN GUI that do not run elevated. */
+ SendMessage(hWnd, WM_CLOSE, 0, 0);
+ Sleep(100);
+ }
+
+ return ERROR_SUCCESS;
+}
+
+
+UINT __stdcall
+StartOpenVPNGUI(_In_ MSIHANDLE hInstall)
+{
+#ifdef _MSC_VER
+#pragma comment(linker, DLLEXP_EXPORT)
+#endif
+
+ debug_popup(TEXT(__FUNCTION__));
+
+ UINT uiResult;
+ BOOL bIsCoInitialized = SUCCEEDED(CoInitialize(NULL));
+
+ OPENVPNMSICA_SAVE_MSI_SESSION(hInstall);
+
+ /* Create and populate a MSI record. */
+ MSIHANDLE hRecord = MsiCreateRecord(1);
+ if (!hRecord)
+ {
+ uiResult = ERROR_INVALID_HANDLE;
+ msg(M_NONFATAL, "%s: MsiCreateRecord failed", __FUNCTION__);
+ goto cleanup_CoInitialize;
+ }
+ uiResult = MsiRecordSetString(hRecord, 0, TEXT("\"[#bin.openvpn_gui.exe]\""));
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiRecordSetString() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiRecordSetString failed", __FUNCTION__);
+ goto cleanup_MsiCreateRecord;
+ }
+
+ /* Format string. */
+ TCHAR szStackBuf[MAX_PATH];
+ DWORD dwPathSize = _countof(szStackBuf);
+ LPTSTR szPath = szStackBuf;
+ uiResult = MsiFormatRecord(hInstall, hRecord, szPath, &dwPathSize);
+ if (uiResult == ERROR_MORE_DATA)
+ {
+ /* Allocate buffer on heap (+1 for terminator), and retry. */
+ szPath = (LPTSTR)malloc((++dwPathSize) * sizeof(TCHAR));
+ if (szPath == NULL)
+ {
+ msg(M_FATAL, "%s: malloc(%u) failed", __FUNCTION__, dwPathSize * sizeof(TCHAR));
+ uiResult = ERROR_OUTOFMEMORY; goto cleanup_MsiCreateRecord;
+ }
+
+ uiResult = MsiFormatRecord(hInstall, hRecord, szPath, &dwPathSize);
+ }
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiFormatRecord() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiFormatRecord failed", __FUNCTION__);
+ goto cleanup_malloc_szPath;
+ }
+
+ /* Launch the OpenVPN GUI. */
+ SHELLEXECUTEINFO sei = {
+ .cbSize = sizeof(SHELLEXECUTEINFO),
+ .fMask = SEE_MASK_FLAG_NO_UI, /* Don't show error UI, we'll display it. */
+ .lpFile = szPath,
+ .nShow = SW_SHOWNORMAL
+ };
+ if (!ShellExecuteEx(&sei))
+ {
+ uiResult = GetLastError();
+ msg(M_NONFATAL | M_ERRNO, "%s: ShellExecuteEx(%s) failed", __FUNCTION__, szPath);
+ goto cleanup_malloc_szPath;
+ }
+
+ uiResult = ERROR_SUCCESS;
+
+cleanup_malloc_szPath:
+ if (szPath != szStackBuf)
+ {
+ free(szPath);
+ }
+cleanup_MsiCreateRecord:
+ MsiCloseHandle(hRecord);
+cleanup_CoInitialize:
+ if (bIsCoInitialized)
+ {
+ CoUninitialize();
+ }
+ return uiResult;
+}
+
+
+/**
+ * Schedules adapter creation.
+ *
+ * When the rollback is enabled, the adapter deletition is scheduled on rollback.
+ *
+ * @param seq The argument sequence to pass to InstallTUNTAPAdapters custom action
+ *
+ * @param seqRollback The argument sequence to pass to InstallTUNTAPAdaptersRollback custom
+ * action. NULL when rollback is disabled.
+ *
+ * @param szDisplayName Adapter display name
+ *
+ * @param szHardwareId Adapter hardware ID
+ *
+ * @param iTicks Pointer to an integer that represents amount of work (on progress
+ * indicator) the InstallTUNTAPAdapters will take. This function increments it
+ * by MSICA_ADAPTER_TICK_SIZE for each adapter to create.
+ *
+ * @return ERROR_SUCCESS on success; An error code otherwise
+ */
+static DWORD
+schedule_adapter_create(
+ _Inout_ struct msica_arg_seq *seq,
+ _Inout_opt_ struct msica_arg_seq *seqRollback,
+ _In_z_ LPCTSTR szDisplayName,
+ _In_z_ LPCTSTR szHardwareId,
+ _Inout_ int *iTicks)
+{
+ /* Get existing network adapters. */
+ struct tap_adapter_node *pAdapterList = NULL;
+ DWORD dwResult = tap_list_adapters(NULL, NULL, &pAdapterList);
+ if (dwResult != ERROR_SUCCESS)
+ {
+ return dwResult;
+ }
+
+ /* Does adapter exist? */
+ for (struct tap_adapter_node *pAdapterOther = pAdapterList;; pAdapterOther = pAdapterOther->pNext)
+ {
+ if (pAdapterOther == NULL)
+ {
+ /* No adapter with a same name found. */
+ TCHAR szArgument[10 /*create=""|deleteN=""*/ + MAX_PATH /*szDisplayName*/ + 1 /*|*/ + MAX_PATH /*szHardwareId*/ + 1 /*terminator*/];
+
+ /* InstallTUNTAPAdapters will create the adapter. */
+ _stprintf_s(
+ szArgument, _countof(szArgument),
+ TEXT("create=\"%.*s|%.*s\""),
+ MAX_PATH, szDisplayName,
+ MAX_PATH, szHardwareId);
+ msica_arg_seq_add_tail(seq, szArgument);
+
+ if (seqRollback)
+ {
+ /* InstallTUNTAPAdaptersRollback will delete the adapter. */
+ _stprintf_s(
+ szArgument, _countof(szArgument),
+ TEXT("deleteN=\"%.*s\""),
+ MAX_PATH, szDisplayName);
+ msica_arg_seq_add_head(seqRollback, szArgument);
+ }
+
+ *iTicks += MSICA_ADAPTER_TICK_SIZE;
+ break;
+ }
+ else if (_tcsicmp(szDisplayName, pAdapterOther->szName) == 0)
+ {
+ /* Adapter with a same name found. */
+ for (LPCTSTR hwid = pAdapterOther->szzHardwareIDs;; hwid += _tcslen(hwid) + 1)
+ {
+ if (hwid[0] == 0)
+ {
+ /* This adapter has a different hardware ID. */
+ msg(M_NONFATAL, "%s: Adapter with name \"%" PRIsLPTSTR "\" already exists", __FUNCTION__, pAdapterOther->szName);
+ dwResult = ERROR_ALREADY_EXISTS;
+ goto cleanup_pAdapterList;
+ }
+ else if (_tcsicmp(hwid, szHardwareId) == 0)
+ {
+ /* This is an adapter with the requested hardware ID. We already have what we want! */
+ break;
+ }
+ }
+ break; /* Adapter names are unique. There should be no other adapter with this name. */
+ }
+ }
+
+cleanup_pAdapterList:
+ tap_free_adapter_list(pAdapterList);
+ return dwResult;
+}
+
+
+/**
+ * Schedules adapter deletion.
+ *
+ * When the rollback is enabled, the adapter deletition is scheduled as: disable in
+ * UninstallTUNTAPAdapters, enable on rollback, delete on commit.
+ *
+ * When rollback is disabled, the adapter deletition is scheduled as delete in
+ * UninstallTUNTAPAdapters.
+ *
+ * @param seq The argument sequence to pass to UninstallTUNTAPAdapters custom action
+ *
+ * @param seqCommit The argument sequence to pass to UninstallTUNTAPAdaptersCommit custom
+ * action. NULL when rollback is disabled.
+ *
+ * @param seqRollback The argument sequence to pass to UninstallTUNTAPAdaptersRollback custom
+ * action. NULL when rollback is disabled.
+ *
+ * @param szDisplayName Adapter display name
+ *
+ * @param szzHardwareIDs String of strings with acceptable adapter hardware IDs
+ *
+ * @param iTicks Pointer to an integer that represents amount of work (on progress
+ * indicator) the UninstallTUNTAPAdapters will take. This function increments
+ * it by MSICA_ADAPTER_TICK_SIZE for each adapter to delete.
+ *
+ * @return ERROR_SUCCESS on success; An error code otherwise
+ */
+static DWORD
+schedule_adapter_delete(
+ _Inout_ struct msica_arg_seq *seq,
+ _Inout_opt_ struct msica_arg_seq *seqCommit,
+ _Inout_opt_ struct msica_arg_seq *seqRollback,
+ _In_z_ LPCTSTR szDisplayName,
+ _In_z_ LPCTSTR szzHardwareIDs,
+ _Inout_ int *iTicks)
+{
+ /* Get adapters with given hardware ID. */
+ struct tap_adapter_node *pAdapterList = NULL;
+ DWORD dwResult = tap_list_adapters(NULL, szzHardwareIDs, &pAdapterList);
+ if (dwResult != ERROR_SUCCESS)
+ {
+ return dwResult;
+ }
+
+ /* Does adapter exist? */
+ for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter != NULL; pAdapter = pAdapter->pNext)
+ {
+ if (_tcsicmp(szDisplayName, pAdapter->szName) == 0)
+ {
+ /* Adapter found. */
+ TCHAR szArgument[8 /*disable=|enable=|delete=*/ + 38 /*{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}*/ + 1 /*terminator*/];
+ if (seqCommit && seqRollback)
+ {
+ /* UninstallTUNTAPAdapters will disable the adapter. */
+ _stprintf_s(
+ szArgument, _countof(szArgument),
+ TEXT("disable=") TEXT(PRIXGUID),
+ PRIGUID_PARAM(pAdapter->guid));
+ msica_arg_seq_add_tail(seq, szArgument);
+
+ /* UninstallTUNTAPAdaptersRollback will re-enable the adapter. */
+ _stprintf_s(
+ szArgument, _countof(szArgument),
+ TEXT("enable=") TEXT(PRIXGUID),
+ PRIGUID_PARAM(pAdapter->guid));
+ msica_arg_seq_add_head(seqRollback, szArgument);
+
+ /* UninstallTUNTAPAdaptersCommit will delete the adapter. */
+ _stprintf_s(
+ szArgument, _countof(szArgument),
+ TEXT("delete=") TEXT(PRIXGUID),
+ PRIGUID_PARAM(pAdapter->guid));
+ msica_arg_seq_add_tail(seqCommit, szArgument);
+ }
+ else
+ {
+ /* UninstallTUNTAPAdapters will delete the adapter. */
+ _stprintf_s(
+ szArgument, _countof(szArgument),
+ TEXT("delete=") TEXT(PRIXGUID),
+ PRIGUID_PARAM(pAdapter->guid));
+ msica_arg_seq_add_tail(seq, szArgument);
+ }
+
+ iTicks += MSICA_ADAPTER_TICK_SIZE;
+ break; /* Adapter names are unique. There should be no other adapter with this name. */
+ }
+ }
+
+ tap_free_adapter_list(pAdapterList);
+ return dwResult;
+}
+
+
+UINT __stdcall
+EvaluateTUNTAPAdapters(_In_ MSIHANDLE hInstall)
+{
+#ifdef _MSC_VER
+#pragma comment(linker, DLLEXP_EXPORT)
+#endif
+
+ debug_popup(TEXT(__FUNCTION__));
+
+ UINT uiResult;
+ BOOL bIsCoInitialized = SUCCEEDED(CoInitialize(NULL));
+
+ OPENVPNMSICA_SAVE_MSI_SESSION(hInstall);
+
+ struct msica_arg_seq
+ seqInstall,
+ seqInstallCommit,
+ seqInstallRollback,
+ seqUninstall,
+ seqUninstallCommit,
+ seqUninstallRollback;
+ msica_arg_seq_init(&seqInstall);
+ msica_arg_seq_init(&seqInstallCommit);
+ msica_arg_seq_init(&seqInstallRollback);
+ msica_arg_seq_init(&seqUninstall);
+ msica_arg_seq_init(&seqUninstallCommit);
+ msica_arg_seq_init(&seqUninstallRollback);
+
+ /* Check rollback state. */
+ bool bRollbackEnabled = MsiEvaluateCondition(hInstall, TEXT("RollbackDisabled")) != MSICONDITION_TRUE;
+
+ /* Open MSI database. */
+ MSIHANDLE hDatabase = MsiGetActiveDatabase(hInstall);
+ if (hDatabase == 0)
+ {
+ msg(M_NONFATAL, "%s: MsiGetActiveDatabase failed", __FUNCTION__);
+ uiResult = ERROR_INVALID_HANDLE;
+ goto cleanup_exec_seq;
+ }
+
+ /* Check if TUNTAPAdapter table exists. If it doesn't exist, there's nothing to do. */
+ switch (MsiDatabaseIsTablePersistent(hDatabase, TEXT("TUNTAPAdapter")))
+ {
+ case MSICONDITION_FALSE:
+ case MSICONDITION_TRUE: break;
+
+ default:
+ uiResult = ERROR_SUCCESS;
+ goto cleanup_hDatabase;
+ }
+
+ /* Prepare a query to get a list/view of adapters. */
+ MSIHANDLE hViewST = 0;
+ LPCTSTR szQuery = TEXT("SELECT `Adapter`,`DisplayName`,`Condition`,`Component_`,`HardwareId` FROM `TUNTAPAdapter`");
+ uiResult = MsiDatabaseOpenView(hDatabase, szQuery, &hViewST);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiDatabaseOpenView() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiDatabaseOpenView(\"%" PRIsLPTSTR "\") failed", __FUNCTION__, szQuery);
+ goto cleanup_hDatabase;
+ }
+
+ /* Execute query! */
+ uiResult = MsiViewExecute(hViewST, 0);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiViewExecute() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiViewExecute(\"%" PRIsLPTSTR "\") failed", __FUNCTION__, szQuery);
+ goto cleanup_hViewST;
+ }
+
+ /* Create a record to report progress with. */
+ MSIHANDLE hRecordProg = MsiCreateRecord(2);
+ if (!hRecordProg)
+ {
+ uiResult = ERROR_INVALID_HANDLE;
+ msg(M_NONFATAL, "%s: MsiCreateRecord failed", __FUNCTION__);
+ goto cleanup_hViewST_close;
+ }
+
+ for (;; )
+ {
+ /* Fetch one record from the view. */
+ MSIHANDLE hRecord = 0;
+ uiResult = MsiViewFetch(hViewST, &hRecord);
+ if (uiResult == ERROR_NO_MORE_ITEMS)
+ {
+ uiResult = ERROR_SUCCESS;
+ break;
+ }
+ else if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiViewFetch() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiViewFetch failed", __FUNCTION__);
+ goto cleanup_hRecordProg;
+ }
+
+ INSTALLSTATE iInstalled, iAction;
+ {
+ /* Read adapter component ID (`Component_` is field #4). */
+ LPTSTR szValue = NULL;
+ uiResult = msi_get_record_string(hRecord, 4, &szValue);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ goto cleanup_hRecord;
+ }
+
+ /* Get the component state. */
+ uiResult = MsiGetComponentState(hInstall, szValue, &iInstalled, &iAction);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ SetLastError(uiResult); /* MSDN does not mention MsiGetComponentState() to set GetLastError(). But we do have an error code. Set last error manually. */
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiGetComponentState(\"%" PRIsLPTSTR "\") failed", __FUNCTION__, szValue);
+ free(szValue);
+ goto cleanup_hRecord;
+ }
+ free(szValue);
+ }
+
+ /* Get adapter display name (`DisplayName` is field #2). */
+ LPTSTR szDisplayName = NULL;
+ uiResult = msi_format_field(hInstall, hRecord, 2, &szDisplayName);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ goto cleanup_hRecord;
+ }
+ /* `DisplayName` field type is [Filename](https://docs.microsoft.com/en-us/windows/win32/msi/filename), which is either "8.3|long name" or "8.3". */
+ LPTSTR szDisplayNameEx = _tcschr(szDisplayName, TEXT('|'));
+ szDisplayNameEx = szDisplayNameEx != NULL ? szDisplayNameEx + 1 : szDisplayName;
+
+ /* Get adapter hardware ID (`HardwareId` is field #5). */
+ TCHAR szzHardwareIDs[0x100] = { 0 };
+ {
+ LPTSTR szHwId = NULL;
+ uiResult = msi_get_record_string(hRecord, 5, &szHwId);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ goto cleanup_szDisplayName;
+ }
+ memcpy_s(szzHardwareIDs, sizeof(szzHardwareIDs) - 2*sizeof(TCHAR) /*requires double zero termination*/, szHwId, _tcslen(szHwId)*sizeof(TCHAR));
+ free(szHwId);
+ }
+
+ if (iAction > INSTALLSTATE_BROKEN)
+ {
+ int iTicks = 0;
+
+ if (iAction >= INSTALLSTATE_LOCAL)
+ {
+ /* Read and evaluate adapter condition (`Condition` is field #3). */
+ LPTSTR szValue = NULL;
+ uiResult = msi_get_record_string(hRecord, 3, &szValue);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ goto cleanup_szDisplayName;
+ }
+#ifdef __GNUC__
+/*
+ * warning: enumeration value ‘MSICONDITION_TRUE’ not handled in switch
+ * warning: enumeration value ‘MSICONDITION_NONE’ not handled in switch
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wswitch"
+#endif
+ switch (MsiEvaluateCondition(hInstall, szValue))
+ {
+ case MSICONDITION_FALSE:
+ free(szValue);
+ goto cleanup_szDisplayName;
+
+ case MSICONDITION_ERROR:
+ uiResult = ERROR_INVALID_FIELD;
+ msg(M_NONFATAL | M_ERRNO, "%s: MsiEvaluateCondition(\"%" PRIsLPTSTR "\") failed", __FUNCTION__, szValue);
+ free(szValue);
+ goto cleanup_szDisplayName;
+ }
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+ free(szValue);
+
+ /* Component is or should be installed. Schedule adapter creation. */
+ if (schedule_adapter_create(
+ &seqInstall,
+ bRollbackEnabled ? &seqInstallRollback : NULL,
+ szDisplayNameEx,
+ szzHardwareIDs,
+ &iTicks) != ERROR_SUCCESS)
+ {
+ uiResult = ERROR_INSTALL_FAILED;
+ goto cleanup_szDisplayName;
+ }
+ }
+ else
+ {
+ /* Component is installed, but should be degraded to advertised/removed. Schedule adapter deletition.
+ *
+ * Note: On adapter removal (product is being uninstalled), we tolerate dwResult error.
+ * Better a partial uninstallation than no uninstallation at all.
+ */
+ schedule_adapter_delete(
+ &seqUninstall,
+ bRollbackEnabled ? &seqUninstallCommit : NULL,
+ bRollbackEnabled ? &seqUninstallRollback : NULL,
+ szDisplayNameEx,
+ szzHardwareIDs,
+ &iTicks);
+ }
+
+ /* Arrange the amount of tick space to add to the progress indicator.
+ * Do this within the loop to poll for user cancellation. */
+ MsiRecordSetInteger(hRecordProg, 1, 3 /* OP3 = Add ticks to the expected total number of progress of the progress bar */);
+ MsiRecordSetInteger(hRecordProg, 2, iTicks);
+ if (MsiProcessMessage(hInstall, INSTALLMESSAGE_PROGRESS, hRecordProg) == IDCANCEL)
+ {
+ uiResult = ERROR_INSTALL_USEREXIT;
+ goto cleanup_szDisplayName;
+ }
+ }
+
+cleanup_szDisplayName:
+ free(szDisplayName);
+cleanup_hRecord:
+ MsiCloseHandle(hRecord);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ goto cleanup_hRecordProg;
+ }
+ }
+
+ /* Store deferred custom action parameters. */
+ if ((uiResult = setup_sequence(hInstall, TEXT("InstallTUNTAPAdapters" ), &seqInstall )) != ERROR_SUCCESS
+ || (uiResult = setup_sequence(hInstall, TEXT("InstallTUNTAPAdaptersCommit" ), &seqInstallCommit )) != ERROR_SUCCESS
+ || (uiResult = setup_sequence(hInstall, TEXT("InstallTUNTAPAdaptersRollback" ), &seqInstallRollback )) != ERROR_SUCCESS
+ || (uiResult = setup_sequence(hInstall, TEXT("UninstallTUNTAPAdapters" ), &seqUninstall )) != ERROR_SUCCESS
+ || (uiResult = setup_sequence(hInstall, TEXT("UninstallTUNTAPAdaptersCommit" ), &seqUninstallCommit )) != ERROR_SUCCESS
+ || (uiResult = setup_sequence(hInstall, TEXT("UninstallTUNTAPAdaptersRollback"), &seqUninstallRollback)) != ERROR_SUCCESS)
+ {
+ goto cleanup_hRecordProg;
+ }
+
+ uiResult = ERROR_SUCCESS;
+
+cleanup_hRecordProg:
+ MsiCloseHandle(hRecordProg);
+cleanup_hViewST_close:
+ MsiViewClose(hViewST);
+cleanup_hViewST:
+ MsiCloseHandle(hViewST);
+cleanup_hDatabase:
+ MsiCloseHandle(hDatabase);
+cleanup_exec_seq:
+ msica_arg_seq_free(&seqInstall);
+ msica_arg_seq_free(&seqInstallCommit);
+ msica_arg_seq_free(&seqInstallRollback);
+ msica_arg_seq_free(&seqUninstall);
+ msica_arg_seq_free(&seqUninstallCommit);
+ msica_arg_seq_free(&seqUninstallRollback);
+ if (bIsCoInitialized)
+ {
+ CoUninitialize();
+ }
+ return uiResult;
+}
+
+
+/**
+ * Parses string encoded GUID.
+ *
+ * @param szArg Zero terminated string where the GUID string starts
+ *
+ * @param guid Pointer to GUID that receives parsed value
+ *
+ * @return TRUE on success; FALSE otherwise
+ */
+static BOOL
+parse_guid(
+ _In_z_ LPCWSTR szArg,
+ _Out_ GUID *guid)
+{
+ if (swscanf_s(szArg, _L(PRIXGUID), PRIGUID_PARAM_REF(*guid)) != 11)
+ {
+ msg(M_NONFATAL | M_ERRNO, "%s: swscanf_s(\"%ls\") failed", __FUNCTION__, szArg);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+
+UINT __stdcall
+ProcessDeferredAction(_In_ MSIHANDLE hInstall)
+{
+#ifdef _MSC_VER
+#pragma comment(linker, DLLEXP_EXPORT)
+#endif
+
+ debug_popup(TEXT(__FUNCTION__));
+
+ UINT uiResult;
+ BOOL bIsCoInitialized = SUCCEEDED(CoInitialize(NULL));
+
+ OPENVPNMSICA_SAVE_MSI_SESSION(hInstall);
+
+ BOOL bIsCleanup = MsiGetMode(hInstall, MSIRUNMODE_COMMIT) || MsiGetMode(hInstall, MSIRUNMODE_ROLLBACK);
+
+ /* Get sequence arguments. Always Unicode as CommandLineToArgvW() is available as Unicode-only. */
+ LPWSTR szSequence = NULL;
+ uiResult = msi_get_string(hInstall, L"CustomActionData", &szSequence);
+ if (uiResult != ERROR_SUCCESS)
+ {
+ goto cleanup_CoInitialize;
+ }
+ int nArgs;
+ LPWSTR *szArg = CommandLineToArgvW(szSequence, &nArgs);
+ if (szArg == NULL)
+ {
+ uiResult = GetLastError();
+ msg(M_NONFATAL | M_ERRNO, "%s: CommandLineToArgvW(\"%ls\") failed", __FUNCTION__, szSequence);
+ goto cleanup_szSequence;
+ }
+
+ /* Tell the installer to use explicit progress messages. */
+ MSIHANDLE hRecordProg = MsiCreateRecord(3);
+ MsiRecordSetInteger(hRecordProg, 1, 1);
+ MsiRecordSetInteger(hRecordProg, 2, 1);
+ MsiRecordSetInteger(hRecordProg, 3, 0);
+ MsiProcessMessage(hInstall, INSTALLMESSAGE_PROGRESS, hRecordProg);
+
+ /* Prepare hRecordProg for progress messages. */
+ MsiRecordSetInteger(hRecordProg, 1, 2);
+ MsiRecordSetInteger(hRecordProg, 3, 0);
+
+ BOOL bRebootRequired = FALSE;
+
+ for (int i = 1 /*CommandLineToArgvW injects msiexec.exe as szArg[0]*/; i < nArgs; ++i)
+ {
+ DWORD dwResult = ERROR_SUCCESS;
+
+ if (wcsncmp(szArg[i], L"create=", 7) == 0)
+ {
+ /* Create an adapter with a given name and hardware ID. */
+ LPWSTR szName = szArg[i] + 7;
+ LPWSTR szHardwareId = wcschr(szName, L'|');
+ if (szHardwareId == NULL)
+ {
+ goto invalid_argument;
+ }
+ szHardwareId[0] = 0;
+ ++szHardwareId;
+
+ {
+ /* Report the name of the adapter to installer. */
+ MSIHANDLE hRecord = MsiCreateRecord(4);
+ MsiRecordSetString(hRecord, 1, TEXT("Creating adapter"));
+ MsiRecordSetString(hRecord, 2, szName);
+ MsiRecordSetString(hRecord, 3, szHardwareId);
+ int iResult = MsiProcessMessage(hInstall, INSTALLMESSAGE_ACTIONDATA, hRecord);
+ MsiCloseHandle(hRecord);
+ if (iResult == IDCANCEL)
+ {
+ uiResult = ERROR_INSTALL_USEREXIT;
+ goto cleanup;
+ }
+ }
+
+ GUID guidAdapter;
+ dwResult = tap_create_adapter(NULL, NULL, szHardwareId, &bRebootRequired, &guidAdapter);
+ if (dwResult == ERROR_SUCCESS)
+ {
+ /* Set adapter name. */
+ dwResult = tap_set_adapter_name(&guidAdapter, szName);
+ if (dwResult != ERROR_SUCCESS)
+ {
+ tap_delete_adapter(NULL, &guidAdapter, &bRebootRequired);
+ }
+ }
+ }
+ else if (wcsncmp(szArg[i], L"deleteN=", 8) == 0)
+ {
+ /* Delete the adapter by name. */
+ LPCWSTR szName = szArg[i] + 8;
+
+ {
+ /* Report the name of the adapter to installer. */
+ MSIHANDLE hRecord = MsiCreateRecord(3);
+ MsiRecordSetString(hRecord, 1, TEXT("Deleting adapter"));
+ MsiRecordSetString(hRecord, 2, szName);
+ int iResult = MsiProcessMessage(hInstall, INSTALLMESSAGE_ACTIONDATA, hRecord);
+ MsiCloseHandle(hRecord);
+ if (iResult == IDCANCEL)
+ {
+ uiResult = ERROR_INSTALL_USEREXIT;
+ goto cleanup;
+ }
+ }
+
+ /* Get existing adapters. */
+ struct tap_adapter_node *pAdapterList = NULL;
+ dwResult = tap_list_adapters(NULL, NULL, &pAdapterList);
+ if (dwResult == ERROR_SUCCESS)
+ {
+ /* Does the adapter exist? */
+ for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter != NULL; pAdapter = pAdapter->pNext)
+ {
+ if (_tcsicmp(szName, pAdapter->szName) == 0)
+ {
+ /* Adapter found. */
+ dwResult = tap_delete_adapter(NULL, &pAdapter->guid, &bRebootRequired);
+ break;
+ }
+ }
+
+ tap_free_adapter_list(pAdapterList);
+ }
+ }
+ else if (wcsncmp(szArg[i], L"delete=", 7) == 0)
+ {
+ /* Delete the adapter by GUID. */
+ GUID guid;
+ if (!parse_guid(szArg[i] + 7, &guid))
+ {
+ goto invalid_argument;
+ }
+ dwResult = tap_delete_adapter(NULL, &guid, &bRebootRequired);
+ }
+ else if (wcsncmp(szArg[i], L"enable=", 7) == 0)
+ {
+ /* Enable the adapter. */
+ GUID guid;
+ if (!parse_guid(szArg[i] + 7, &guid))
+ {
+ goto invalid_argument;
+ }
+ dwResult = tap_enable_adapter(NULL, &guid, TRUE, &bRebootRequired);
+ }
+ else if (wcsncmp(szArg[i], L"disable=", 8) == 0)
+ {
+ /* Disable the adapter. */
+ GUID guid;
+ if (!parse_guid(szArg[i] + 8, &guid))
+ {
+ goto invalid_argument;
+ }
+ dwResult = tap_enable_adapter(NULL, &guid, FALSE, &bRebootRequired);
+ }
+ else
+ {
+ goto invalid_argument;
+ }
+
+ if (dwResult != ERROR_SUCCESS && !bIsCleanup /* Ignore errors in case of commit/rollback to do as much work as possible. */)
+ {
+ uiResult = ERROR_INSTALL_FAILURE;
+ goto cleanup;
+ }
+
+ /* Report progress and check for user cancellation. */
+ MsiRecordSetInteger(hRecordProg, 2, MSICA_ADAPTER_TICK_SIZE);
+ if (MsiProcessMessage(hInstall, INSTALLMESSAGE_PROGRESS, hRecordProg) == IDCANCEL)
+ {
+ dwResult = ERROR_INSTALL_USEREXIT;
+ goto cleanup;
+ }
+
+ continue;
+
+invalid_argument:
+ msg(M_NONFATAL, "%s: Ignoring invalid argument: %ls", __FUNCTION__, szArg[i]);
+ }
+
+cleanup:
+ if (bRebootRequired)
+ {
+ MsiSetMode(hInstall, MSIRUNMODE_REBOOTATEND, TRUE);
+ }
+ MsiCloseHandle(hRecordProg);
+ LocalFree(szArg);
+cleanup_szSequence:
+ free(szSequence);
+cleanup_CoInitialize:
+ if (bIsCoInitialized)
+ {
+ CoUninitialize();
+ }
+ return uiResult;
+}