| /* |
| * tapctl -- Utility to manipulate TUN/TAP adapters on Windows |
| * https://community.openvpn.net/openvpn/wiki/Tapctl |
| * |
| * Copyright (C) 2002-2021 OpenVPN Inc <sales@openvpn.net> |
| * Copyright (C) 2018-2021 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 |
| #ifdef HAVE_CONFIG_VERSION_H |
| #include <config-version.h> |
| #endif |
| |
| #include "tap.h" |
| #include "error.h" |
| |
| #include <objbase.h> |
| #include <setupapi.h> |
| #include <stdio.h> |
| #include <tchar.h> |
| |
| #ifdef _MSC_VER |
| #pragma comment(lib, "ole32.lib") |
| #pragma comment(lib, "setupapi.lib") |
| #endif |
| |
| |
| const TCHAR title_string[] = |
| TEXT(PACKAGE_NAME) TEXT(" ") TEXT(PACKAGE_VERSION) |
| TEXT(" built on ") TEXT(__DATE__) |
| ; |
| |
| static const TCHAR usage_message[] = |
| TEXT("%s\n") |
| TEXT("\n") |
| TEXT("Usage:\n") |
| TEXT("\n") |
| TEXT("tapctl <command> [<command specific options>]\n") |
| TEXT("\n") |
| TEXT("Commands:\n") |
| TEXT("\n") |
| TEXT("create Create a new TUN/TAP adapter\n") |
| TEXT("list List TUN/TAP adapters\n") |
| TEXT("delete Delete specified network adapter\n") |
| TEXT("help Display this text\n") |
| TEXT("\n") |
| TEXT("Hint: Use \"tapctl help <command>\" to display help for particular command.\n") |
| ; |
| |
| static const TCHAR usage_message_create[] = |
| TEXT("%s\n") |
| TEXT("\n") |
| TEXT("Creates a new TUN/TAP adapter\n") |
| TEXT("\n") |
| TEXT("Usage:\n") |
| TEXT("\n") |
| TEXT("tapctl create [<options>]\n") |
| TEXT("\n") |
| TEXT("Options:\n") |
| TEXT("\n") |
| TEXT("--name <name> Set TUN/TAP adapter name. Should the adapter with given name \n") |
| TEXT(" already exist, an error is returned. If this option is not \n") |
| TEXT(" specified, a default adapter name is chosen by Windows. \n") |
| TEXT(" Note: This name can also be specified as OpenVPN's --dev-node \n") |
| TEXT(" option. \n") |
| TEXT("--hwid <hwid> Adapter hardware ID. Default value is root\\tap0901, which \n") |
| TEXT(" describes tap-windows6 driver. To work with wintun driver, \n") |
| TEXT(" specify 'wintun'. \n") |
| TEXT("\n") |
| TEXT("Output:\n") |
| TEXT("\n") |
| TEXT("This command prints newly created TUN/TAP adapter's GUID to stdout. \n") |
| ; |
| |
| static const TCHAR usage_message_list[] = |
| TEXT("%s\n") |
| TEXT("\n") |
| TEXT("Lists TUN/TAP adapters\n") |
| TEXT("\n") |
| TEXT("Usage:\n") |
| TEXT("\n") |
| TEXT("tapctl list\n") |
| TEXT("\n") |
| TEXT("Options:\n") |
| TEXT("\n") |
| TEXT("--hwid <hwid> Adapter hardware ID. By default, root\\tap0901, tap0901 and \n") |
| TEXT(" wintun adapters are listed. Use this switch to limit the list. \n") |
| TEXT("\n") |
| TEXT("Output:\n") |
| TEXT("\n") |
| TEXT("This command prints all TUN/TAP adapters to stdout. \n") |
| ; |
| |
| static const TCHAR usage_message_delete[] = |
| TEXT("%s\n") |
| TEXT("\n") |
| TEXT("Deletes the specified network adapter\n") |
| TEXT("\n") |
| TEXT("Usage:\n") |
| TEXT("\n") |
| TEXT("tapctl delete <adapter GUID | adapter name>\n") |
| ; |
| |
| |
| /** |
| * Print the help message. |
| */ |
| static void |
| usage(void) |
| { |
| _ftprintf(stderr, |
| usage_message, |
| title_string); |
| } |
| |
| |
| /** |
| * Program entry point |
| */ |
| int __cdecl |
| _tmain(int argc, LPCTSTR argv[]) |
| { |
| int iResult; |
| BOOL bRebootRequired = FALSE; |
| |
| /* Ask SetupAPI to keep quiet. */ |
| SetupSetNonInteractiveMode(TRUE); |
| |
| if (argc < 2) |
| { |
| usage(); |
| return 1; |
| } |
| else if (_tcsicmp(argv[1], TEXT("help")) == 0) |
| { |
| /* Output help. */ |
| if (argc < 3) |
| { |
| usage(); |
| } |
| else if (_tcsicmp(argv[2], TEXT("create")) == 0) |
| { |
| _ftprintf(stderr, usage_message_create, title_string); |
| } |
| else if (_tcsicmp(argv[2], TEXT("list")) == 0) |
| { |
| _ftprintf(stderr, usage_message_list, title_string); |
| } |
| else if (_tcsicmp(argv[2], TEXT("delete")) == 0) |
| { |
| _ftprintf(stderr, usage_message_delete, title_string); |
| } |
| else |
| { |
| _ftprintf(stderr, TEXT("Unknown command \"%s\". Please, use \"tapctl help\" to list supported commands.\n"), argv[2]); |
| } |
| |
| return 1; |
| } |
| else if (_tcsicmp(argv[1], TEXT("create")) == 0) |
| { |
| LPCTSTR szName = NULL; |
| LPCTSTR szHwId = TEXT("root\\") TEXT(TAP_WIN_COMPONENT_ID); |
| |
| /* Parse options. */ |
| for (int i = 2; i < argc; i++) |
| { |
| if (_tcsicmp(argv[i], TEXT("--name")) == 0) |
| { |
| szName = argv[++i]; |
| } |
| else |
| if (_tcsicmp(argv[i], TEXT("--hwid")) == 0) |
| { |
| szHwId = argv[++i]; |
| } |
| else |
| { |
| _ftprintf(stderr, TEXT("Unknown option \"%s\". Please, use \"tapctl help create\" to list supported options. Ignored.\n"), argv[i]); |
| } |
| } |
| |
| /* Create TUN/TAP adapter. */ |
| GUID guidAdapter; |
| LPOLESTR szAdapterId = NULL; |
| DWORD dwResult = tap_create_adapter( |
| NULL, |
| TEXT("Virtual Ethernet"), |
| szHwId, |
| &bRebootRequired, |
| &guidAdapter); |
| if (dwResult != ERROR_SUCCESS) |
| { |
| _ftprintf(stderr, TEXT("Creating TUN/TAP adapter failed (error 0x%x).\n"), dwResult); |
| iResult = 1; goto quit; |
| } |
| |
| if (szName) |
| { |
| /* Get existing network adapters. */ |
| struct tap_adapter_node *pAdapterList = NULL; |
| dwResult = tap_list_adapters(NULL, NULL, &pAdapterList); |
| if (dwResult != ERROR_SUCCESS) |
| { |
| _ftprintf(stderr, TEXT("Enumerating adapters failed (error 0x%x).\n"), dwResult); |
| iResult = 1; goto create_delete_adapter; |
| } |
| |
| /* Check for duplicates. */ |
| for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter; pAdapter = pAdapter->pNext) |
| { |
| if (_tcsicmp(szName, pAdapter->szName) == 0) |
| { |
| StringFromIID((REFIID)&pAdapter->guid, &szAdapterId); |
| _ftprintf(stderr, TEXT("Adapter \"%s\" already exists (GUID %") TEXT(PRIsLPOLESTR) TEXT(").\n"), pAdapter->szName, szAdapterId); |
| CoTaskMemFree(szAdapterId); |
| iResult = 1; goto create_cleanup_pAdapterList; |
| } |
| } |
| |
| /* Rename the adapter. */ |
| dwResult = tap_set_adapter_name(&guidAdapter, szName, FALSE); |
| if (dwResult != ERROR_SUCCESS) |
| { |
| StringFromIID((REFIID)&guidAdapter, &szAdapterId); |
| _ftprintf(stderr, TEXT("Renaming TUN/TAP adapter %") TEXT(PRIsLPOLESTR) TEXT(" to \"%s\" failed (error 0x%x).\n"), szAdapterId, szName, dwResult); |
| CoTaskMemFree(szAdapterId); |
| iResult = 1; goto quit; |
| } |
| |
| iResult = 0; |
| |
| create_cleanup_pAdapterList: |
| tap_free_adapter_list(pAdapterList); |
| if (iResult) |
| { |
| goto create_delete_adapter; |
| } |
| } |
| |
| /* Output adapter GUID. */ |
| StringFromIID((REFIID)&guidAdapter, &szAdapterId); |
| _ftprintf(stdout, TEXT("%") TEXT(PRIsLPOLESTR) TEXT("\n"), szAdapterId); |
| CoTaskMemFree(szAdapterId); |
| |
| iResult = 0; goto quit; |
| |
| create_delete_adapter: |
| tap_delete_adapter( |
| NULL, |
| &guidAdapter, |
| &bRebootRequired); |
| iResult = 1; goto quit; |
| } |
| else if (_tcsicmp(argv[1], TEXT("list")) == 0) |
| { |
| TCHAR szzHwId[0x100] = |
| TEXT("root\\") TEXT(TAP_WIN_COMPONENT_ID) TEXT("\0") |
| TEXT(TAP_WIN_COMPONENT_ID) TEXT("\0") |
| TEXT("Wintun\0"); |
| |
| /* Parse options. */ |
| for (int i = 2; i < argc; i++) |
| { |
| if (_tcsicmp(argv[i], TEXT("--hwid")) == 0) |
| { |
| memset(szzHwId, 0, sizeof(szzHwId)); |
| ++i; |
| memcpy_s(szzHwId, sizeof(szzHwId) - 2*sizeof(TCHAR) /*requires double zero termination*/, argv[i], _tcslen(argv[i])*sizeof(TCHAR)); |
| } |
| else |
| { |
| _ftprintf(stderr, TEXT("Unknown option \"%s\". Please, use \"tapctl help list\" to list supported options. Ignored.\n"), argv[i]); |
| } |
| } |
| |
| /* Output list of adapters with given hardware ID. */ |
| struct tap_adapter_node *pAdapterList = NULL; |
| DWORD dwResult = tap_list_adapters(NULL, szzHwId, &pAdapterList); |
| if (dwResult != ERROR_SUCCESS) |
| { |
| _ftprintf(stderr, TEXT("Enumerating TUN/TAP adapters failed (error 0x%x).\n"), dwResult); |
| iResult = 1; goto quit; |
| } |
| |
| for (struct tap_adapter_node *pAdapter = pAdapterList; pAdapter; pAdapter = pAdapter->pNext) |
| { |
| LPOLESTR szAdapterId = NULL; |
| StringFromIID((REFIID)&pAdapter->guid, &szAdapterId); |
| _ftprintf(stdout, TEXT("%") TEXT(PRIsLPOLESTR) TEXT("\t%") TEXT(PRIsLPTSTR) TEXT("\n"), szAdapterId, pAdapter->szName); |
| CoTaskMemFree(szAdapterId); |
| } |
| |
| iResult = 0; |
| tap_free_adapter_list(pAdapterList); |
| } |
| else if (_tcsicmp(argv[1], TEXT("delete")) == 0) |
| { |
| if (argc < 3) |
| { |
| _ftprintf(stderr, TEXT("Missing adapter GUID or name. Please, use \"tapctl help delete\" for usage info.\n")); |
| return 1; |
| } |
| |
| GUID guidAdapter; |
| if (FAILED(IIDFromString(argv[2], (LPIID)&guidAdapter))) |
| { |
| /* The argument failed to covert to GUID. Treat it as the adapter name. */ |
| struct tap_adapter_node *pAdapterList = NULL; |
| DWORD dwResult = tap_list_adapters(NULL, NULL, &pAdapterList); |
| if (dwResult != ERROR_SUCCESS) |
| { |
| _ftprintf(stderr, TEXT("Enumerating TUN/TAP adapters failed (error 0x%x).\n"), dwResult); |
| iResult = 1; goto quit; |
| } |
| |
| for (struct tap_adapter_node *pAdapter = pAdapterList;; pAdapter = pAdapter->pNext) |
| { |
| if (pAdapter == NULL) |
| { |
| _ftprintf(stderr, TEXT("\"%s\" adapter not found.\n"), argv[2]); |
| iResult = 1; goto delete_cleanup_pAdapterList; |
| } |
| else if (_tcsicmp(argv[2], pAdapter->szName) == 0) |
| { |
| memcpy(&guidAdapter, &pAdapter->guid, sizeof(GUID)); |
| break; |
| } |
| } |
| |
| iResult = 0; |
| |
| delete_cleanup_pAdapterList: |
| tap_free_adapter_list(pAdapterList); |
| if (iResult) |
| { |
| goto quit; |
| } |
| } |
| |
| /* Delete the network adapter. */ |
| DWORD dwResult = tap_delete_adapter( |
| NULL, |
| &guidAdapter, |
| &bRebootRequired); |
| if (dwResult != ERROR_SUCCESS) |
| { |
| _ftprintf(stderr, TEXT("Deleting adapter \"%s\" failed (error 0x%x).\n"), argv[2], dwResult); |
| iResult = 1; goto quit; |
| } |
| |
| iResult = 0; goto quit; |
| } |
| else |
| { |
| _ftprintf(stderr, TEXT("Unknown command \"%s\". Please, use \"tapctl help\" to list supported commands.\n"), argv[1]); |
| return 1; |
| } |
| |
| quit: |
| if (bRebootRequired) |
| { |
| _ftprintf(stderr, TEXT("A system reboot is required.\n")); |
| } |
| |
| return iResult; |
| } |
| |
| |
| bool |
| dont_mute(unsigned int flags) |
| { |
| UNREFERENCED_PARAMETER(flags); |
| |
| return true; |
| } |
| |
| |
| void |
| x_msg_va(const unsigned int flags, const char *format, va_list arglist) |
| { |
| /* Output message string. Note: Message strings don't contain line terminators. */ |
| vfprintf(stderr, format, arglist); |
| _ftprintf(stderr, TEXT("\n")); |
| |
| if ((flags & M_ERRNO) != 0) |
| { |
| /* Output system error message (if possible). */ |
| DWORD dwResult = GetLastError(); |
| LPTSTR szErrMessage = NULL; |
| if (FormatMessage( |
| FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_IGNORE_INSERTS, |
| 0, |
| dwResult, |
| 0, |
| (LPTSTR)&szErrMessage, |
| 0, |
| NULL) && szErrMessage) |
| { |
| /* Trim trailing whitespace. Set terminator after the last non-whitespace character. This prevents excessive trailing line breaks. */ |
| for (size_t i = 0, i_last = 0;; i++) |
| { |
| if (szErrMessage[i]) |
| { |
| if (!_istspace(szErrMessage[i])) |
| { |
| i_last = i + 1; |
| } |
| } |
| else |
| { |
| szErrMessage[i_last] = 0; |
| break; |
| } |
| } |
| |
| /* Output error message. */ |
| _ftprintf(stderr, TEXT("Error 0x%x: %s\n"), dwResult, szErrMessage); |
| |
| LocalFree(szErrMessage); |
| } |
| else |
| { |
| _ftprintf(stderr, TEXT("Error 0x%x\n"), dwResult); |
| } |
| } |
| } |
