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/*
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* TAP-Win32 -- A kernel driver to provide virtual tap device functionality
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* on Windows. Originally derived from the CIPE-Win32
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* project by Damion K. Wilson, with extensive modifications by
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* James Yonan.
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*
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* All source code which derives from the CIPE-Win32 project is
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* Copyright (C) Damion K. Wilson, 2003, and is released under the
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* GPL version 2 (see below).
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*
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* All other source code is Copyright (C) James Yonan, 2003-2004,
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* and is released under the GPL version 2 (see below).
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING included with this
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* distribution); if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu-common.h" |
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#include "net.h" |
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#include "sysemu.h" |
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#include <stdio.h> |
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#include <windows.h> |
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/* NOTE: PCIBus is redefined in winddk.h */
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#define PCIBus _PCIBus
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#include <ddk/ntapi.h> |
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#include <ddk/winddk.h> |
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#include <ddk/ntddk.h> |
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#undef PCIBus
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//=============
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// TAP IOCTLs
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//=============
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#define TAP_CONTROL_CODE(request,method) \
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CTL_CODE (FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS) |
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#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE (1, METHOD_BUFFERED) |
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#define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE (2, METHOD_BUFFERED) |
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#define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE (3, METHOD_BUFFERED) |
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#define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE (4, METHOD_BUFFERED) |
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#define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE (5, METHOD_BUFFERED) |
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#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE (6, METHOD_BUFFERED) |
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#define TAP_IOCTL_CONFIG_DHCP_MASQ TAP_CONTROL_CODE (7, METHOD_BUFFERED) |
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#define TAP_IOCTL_GET_LOG_LINE TAP_CONTROL_CODE (8, METHOD_BUFFERED) |
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#define TAP_IOCTL_CONFIG_DHCP_SET_OPT TAP_CONTROL_CODE (9, METHOD_BUFFERED) |
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//=================
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// Registry keys
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//=================
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#define ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}" |
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#define NETWORK_CONNECTIONS_KEY "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}" |
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//======================
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// Filesystem prefixes
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//======================
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#define USERMODEDEVICEDIR "\\\\.\\Global\\" |
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#define TAPSUFFIX ".tap" |
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//======================
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// Compile time configuration
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//======================
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//#define DEBUG_TAP_WIN32
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#define TUN_ASYNCHRONOUS_WRITES 1 |
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#define TUN_BUFFER_SIZE 1560 |
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#define TUN_MAX_BUFFER_COUNT 32 |
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/*
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* The data member "buffer" must be the first element in the tun_buffer
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* structure. See the function, tap_win32_free_buffer.
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*/
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typedef struct tun_buffer_s { |
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unsigned char buffer [TUN_BUFFER_SIZE]; |
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unsigned long read_size; |
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struct tun_buffer_s* next;
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} tun_buffer_t; |
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typedef struct tap_win32_overlapped { |
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HANDLE handle; |
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HANDLE read_event; |
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HANDLE write_event; |
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HANDLE output_queue_semaphore; |
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HANDLE free_list_semaphore; |
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HANDLE tap_semaphore; |
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CRITICAL_SECTION output_queue_cs; |
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CRITICAL_SECTION free_list_cs; |
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OVERLAPPED read_overlapped; |
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OVERLAPPED write_overlapped; |
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tun_buffer_t buffers[TUN_MAX_BUFFER_COUNT]; |
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tun_buffer_t* free_list; |
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tun_buffer_t* output_queue_front; |
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tun_buffer_t* output_queue_back; |
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} tap_win32_overlapped_t; |
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static tap_win32_overlapped_t tap_overlapped;
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static tun_buffer_t* get_buffer_from_free_list(tap_win32_overlapped_t* const overlapped) |
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{ |
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tun_buffer_t* buffer = NULL;
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WaitForSingleObject(overlapped->free_list_semaphore, INFINITE); |
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EnterCriticalSection(&overlapped->free_list_cs); |
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buffer = overlapped->free_list; |
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// assert(buffer != NULL);
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overlapped->free_list = buffer->next; |
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LeaveCriticalSection(&overlapped->free_list_cs); |
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buffer->next = NULL;
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return buffer;
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} |
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static void put_buffer_on_free_list(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer) |
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{ |
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EnterCriticalSection(&overlapped->free_list_cs); |
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buffer->next = overlapped->free_list; |
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overlapped->free_list = buffer; |
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LeaveCriticalSection(&overlapped->free_list_cs); |
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ReleaseSemaphore(overlapped->free_list_semaphore, 1, NULL); |
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} |
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static tun_buffer_t* get_buffer_from_output_queue(tap_win32_overlapped_t* const overlapped, const int block) |
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{ |
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tun_buffer_t* buffer = NULL;
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DWORD result, timeout = block ? INFINITE : 0L;
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// Non-blocking call
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result = WaitForSingleObject(overlapped->output_queue_semaphore, timeout); |
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switch (result)
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{ |
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// The semaphore object was signaled.
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case WAIT_OBJECT_0:
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EnterCriticalSection(&overlapped->output_queue_cs); |
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buffer = overlapped->output_queue_front; |
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overlapped->output_queue_front = buffer->next; |
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if(overlapped->output_queue_front == NULL) { |
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overlapped->output_queue_back = NULL;
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} |
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LeaveCriticalSection(&overlapped->output_queue_cs); |
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break;
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// Semaphore was nonsignaled, so a time-out occurred.
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case WAIT_TIMEOUT:
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// Cannot open another window.
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break;
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} |
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return buffer;
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} |
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static tun_buffer_t* get_buffer_from_output_queue_immediate (tap_win32_overlapped_t* const overlapped) |
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{ |
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return get_buffer_from_output_queue(overlapped, 0); |
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} |
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static void put_buffer_on_output_queue(tap_win32_overlapped_t* const overlapped, tun_buffer_t* const buffer) |
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{ |
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EnterCriticalSection(&overlapped->output_queue_cs); |
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if(overlapped->output_queue_front == NULL && overlapped->output_queue_back == NULL) { |
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overlapped->output_queue_front = overlapped->output_queue_back = buffer; |
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} else {
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buffer->next = NULL;
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overlapped->output_queue_back->next = buffer; |
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overlapped->output_queue_back = buffer; |
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} |
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LeaveCriticalSection(&overlapped->output_queue_cs); |
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ReleaseSemaphore(overlapped->output_queue_semaphore, 1, NULL); |
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} |
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static int is_tap_win32_dev(const char *guid) |
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{ |
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HKEY netcard_key; |
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LONG status; |
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DWORD len; |
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int i = 0; |
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status = RegOpenKeyEx( |
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HKEY_LOCAL_MACHINE, |
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ADAPTER_KEY, |
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0,
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KEY_READ, |
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&netcard_key); |
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if (status != ERROR_SUCCESS) {
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return FALSE;
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} |
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for (;;) {
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char enum_name[256]; |
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char unit_string[256]; |
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HKEY unit_key; |
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char component_id_string[] = "ComponentId"; |
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char component_id[256]; |
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char net_cfg_instance_id_string[] = "NetCfgInstanceId"; |
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char net_cfg_instance_id[256]; |
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DWORD data_type; |
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len = sizeof (enum_name);
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status = RegEnumKeyEx( |
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netcard_key, |
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i, |
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enum_name, |
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&len, |
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NULL,
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NULL,
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NULL,
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NULL);
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if (status == ERROR_NO_MORE_ITEMS)
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break;
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else if (status != ERROR_SUCCESS) { |
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return FALSE;
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} |
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snprintf (unit_string, sizeof(unit_string), "%s\\%s", |
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ADAPTER_KEY, enum_name); |
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status = RegOpenKeyEx( |
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HKEY_LOCAL_MACHINE, |
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unit_string, |
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0,
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KEY_READ, |
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&unit_key); |
246 |
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if (status != ERROR_SUCCESS) {
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return FALSE;
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} else {
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len = sizeof (component_id);
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status = RegQueryValueEx( |
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unit_key, |
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component_id_string, |
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NULL,
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&data_type, |
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(LPBYTE)component_id, |
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&len); |
258 |
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if (!(status != ERROR_SUCCESS || data_type != REG_SZ)) {
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len = sizeof (net_cfg_instance_id);
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status = RegQueryValueEx( |
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unit_key, |
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net_cfg_instance_id_string, |
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NULL,
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&data_type, |
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(LPBYTE)net_cfg_instance_id, |
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&len); |
268 |
|
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if (status == ERROR_SUCCESS && data_type == REG_SZ) {
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if (/* !strcmp (component_id, TAP_COMPONENT_ID) &&*/ |
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!strcmp (net_cfg_instance_id, guid)) { |
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RegCloseKey (unit_key); |
273 |
RegCloseKey (netcard_key); |
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return TRUE;
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} |
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} |
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} |
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RegCloseKey (unit_key); |
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} |
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++i; |
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} |
282 |
|
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RegCloseKey (netcard_key); |
284 |
return FALSE;
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} |
286 |
|
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static int get_device_guid( |
288 |
char *name,
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int name_size,
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char *actual_name,
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int actual_name_size)
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{ |
293 |
LONG status; |
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HKEY control_net_key; |
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DWORD len; |
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int i = 0; |
297 |
int stop = 0; |
298 |
|
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status = RegOpenKeyEx( |
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HKEY_LOCAL_MACHINE, |
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NETWORK_CONNECTIONS_KEY, |
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0,
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KEY_READ, |
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&control_net_key); |
305 |
|
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if (status != ERROR_SUCCESS) {
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return -1; |
308 |
} |
309 |
|
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while (!stop)
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{ |
312 |
char enum_name[256]; |
313 |
char connection_string[256]; |
314 |
HKEY connection_key; |
315 |
char name_data[256]; |
316 |
DWORD name_type; |
317 |
const char name_string[] = "Name"; |
318 |
|
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len = sizeof (enum_name);
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status = RegEnumKeyEx( |
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control_net_key, |
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i, |
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enum_name, |
324 |
&len, |
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NULL,
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NULL,
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NULL,
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NULL);
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|
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if (status == ERROR_NO_MORE_ITEMS)
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break;
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332 |
else if (status != ERROR_SUCCESS) { |
333 |
return -1; |
334 |
} |
335 |
|
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snprintf(connection_string, |
337 |
sizeof(connection_string),
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"%s\\%s\\Connection",
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NETWORK_CONNECTIONS_KEY, enum_name); |
340 |
|
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status = RegOpenKeyEx( |
342 |
HKEY_LOCAL_MACHINE, |
343 |
connection_string, |
344 |
0,
|
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KEY_READ, |
346 |
&connection_key); |
347 |
|
348 |
if (status == ERROR_SUCCESS) {
|
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len = sizeof (name_data);
|
350 |
status = RegQueryValueEx( |
351 |
connection_key, |
352 |
name_string, |
353 |
NULL,
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&name_type, |
355 |
(LPBYTE)name_data, |
356 |
&len); |
357 |
|
358 |
if (status != ERROR_SUCCESS || name_type != REG_SZ) {
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359 |
return -1; |
360 |
} |
361 |
else {
|
362 |
if (is_tap_win32_dev(enum_name)) {
|
363 |
snprintf(name, name_size, "%s", enum_name);
|
364 |
if (actual_name) {
|
365 |
if (strcmp(actual_name, "") != 0) { |
366 |
if (strcmp(name_data, actual_name) != 0) { |
367 |
RegCloseKey (connection_key); |
368 |
++i; |
369 |
continue;
|
370 |
} |
371 |
} |
372 |
else {
|
373 |
snprintf(actual_name, actual_name_size, "%s", name_data);
|
374 |
} |
375 |
} |
376 |
stop = 1;
|
377 |
} |
378 |
} |
379 |
|
380 |
RegCloseKey (connection_key); |
381 |
} |
382 |
++i; |
383 |
} |
384 |
|
385 |
RegCloseKey (control_net_key); |
386 |
|
387 |
if (stop == 0) |
388 |
return -1; |
389 |
|
390 |
return 0; |
391 |
} |
392 |
|
393 |
static int tap_win32_set_status(HANDLE handle, int status) |
394 |
{ |
395 |
unsigned long len = 0; |
396 |
|
397 |
return DeviceIoControl(handle, TAP_IOCTL_SET_MEDIA_STATUS,
|
398 |
&status, sizeof (status),
|
399 |
&status, sizeof (status), &len, NULL); |
400 |
} |
401 |
|
402 |
static void tap_win32_overlapped_init(tap_win32_overlapped_t* const overlapped, const HANDLE handle) |
403 |
{ |
404 |
overlapped->handle = handle; |
405 |
|
406 |
overlapped->read_event = CreateEvent(NULL, FALSE, FALSE, NULL); |
407 |
overlapped->write_event = CreateEvent(NULL, FALSE, FALSE, NULL); |
408 |
|
409 |
overlapped->read_overlapped.Offset = 0;
|
410 |
overlapped->read_overlapped.OffsetHigh = 0;
|
411 |
overlapped->read_overlapped.hEvent = overlapped->read_event; |
412 |
|
413 |
overlapped->write_overlapped.Offset = 0;
|
414 |
overlapped->write_overlapped.OffsetHigh = 0;
|
415 |
overlapped->write_overlapped.hEvent = overlapped->write_event; |
416 |
|
417 |
InitializeCriticalSection(&overlapped->output_queue_cs); |
418 |
InitializeCriticalSection(&overlapped->free_list_cs); |
419 |
|
420 |
overlapped->output_queue_semaphore = CreateSemaphore( |
421 |
NULL, // default security attributes |
422 |
0, // initial count |
423 |
TUN_MAX_BUFFER_COUNT, // maximum count
|
424 |
NULL); // unnamed semaphore |
425 |
|
426 |
if(!overlapped->output_queue_semaphore) {
|
427 |
fprintf(stderr, "error creating output queue semaphore!\n");
|
428 |
} |
429 |
|
430 |
overlapped->free_list_semaphore = CreateSemaphore( |
431 |
NULL, // default security attributes |
432 |
TUN_MAX_BUFFER_COUNT, // initial count
|
433 |
TUN_MAX_BUFFER_COUNT, // maximum count
|
434 |
NULL); // unnamed semaphore |
435 |
|
436 |
if(!overlapped->free_list_semaphore) {
|
437 |
fprintf(stderr, "error creating free list semaphore!\n");
|
438 |
} |
439 |
|
440 |
overlapped->free_list = overlapped->output_queue_front = overlapped->output_queue_back = NULL;
|
441 |
|
442 |
{ |
443 |
unsigned index;
|
444 |
for(index = 0; index < TUN_MAX_BUFFER_COUNT; index++) { |
445 |
tun_buffer_t* element = &overlapped->buffers[index]; |
446 |
element->next = overlapped->free_list; |
447 |
overlapped->free_list = element; |
448 |
} |
449 |
} |
450 |
/* To count buffers, initially no-signal. */
|
451 |
overlapped->tap_semaphore = CreateSemaphore(NULL, 0, TUN_MAX_BUFFER_COUNT, NULL); |
452 |
if(!overlapped->tap_semaphore)
|
453 |
fprintf(stderr, "error creating tap_semaphore.\n");
|
454 |
} |
455 |
|
456 |
static int tap_win32_write(tap_win32_overlapped_t *overlapped, |
457 |
const void *buffer, unsigned long size) |
458 |
{ |
459 |
unsigned long write_size; |
460 |
BOOL result; |
461 |
DWORD error; |
462 |
|
463 |
result = GetOverlappedResult( overlapped->handle, &overlapped->write_overlapped, |
464 |
&write_size, FALSE); |
465 |
|
466 |
if (!result && GetLastError() == ERROR_IO_INCOMPLETE)
|
467 |
WaitForSingleObject(overlapped->write_event, INFINITE); |
468 |
|
469 |
result = WriteFile(overlapped->handle, buffer, size, |
470 |
&write_size, &overlapped->write_overlapped); |
471 |
|
472 |
if (!result) {
|
473 |
switch (error = GetLastError())
|
474 |
{ |
475 |
case ERROR_IO_PENDING:
|
476 |
#ifndef TUN_ASYNCHRONOUS_WRITES
|
477 |
WaitForSingleObject(overlapped->write_event, INFINITE); |
478 |
#endif
|
479 |
break;
|
480 |
default:
|
481 |
return -1; |
482 |
} |
483 |
} |
484 |
|
485 |
return 0; |
486 |
} |
487 |
|
488 |
static DWORD WINAPI tap_win32_thread_entry(LPVOID param)
|
489 |
{ |
490 |
tap_win32_overlapped_t *overlapped = (tap_win32_overlapped_t*)param; |
491 |
unsigned long read_size; |
492 |
BOOL result; |
493 |
DWORD dwError; |
494 |
tun_buffer_t* buffer = get_buffer_from_free_list(overlapped); |
495 |
|
496 |
|
497 |
for (;;) {
|
498 |
result = ReadFile(overlapped->handle, |
499 |
buffer->buffer, |
500 |
sizeof(buffer->buffer),
|
501 |
&read_size, |
502 |
&overlapped->read_overlapped); |
503 |
if (!result) {
|
504 |
dwError = GetLastError(); |
505 |
if (dwError == ERROR_IO_PENDING) {
|
506 |
WaitForSingleObject(overlapped->read_event, INFINITE); |
507 |
result = GetOverlappedResult( overlapped->handle, &overlapped->read_overlapped, |
508 |
&read_size, FALSE); |
509 |
if (!result) {
|
510 |
#ifdef DEBUG_TAP_WIN32
|
511 |
LPVOID lpBuffer; |
512 |
dwError = GetLastError(); |
513 |
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, |
514 |
NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
515 |
(LPTSTR) & lpBuffer, 0, NULL ); |
516 |
fprintf(stderr, "Tap-Win32: Error GetOverlappedResult %d - %s\n", dwError, lpBuffer);
|
517 |
LocalFree( lpBuffer ); |
518 |
#endif
|
519 |
} |
520 |
} else {
|
521 |
#ifdef DEBUG_TAP_WIN32
|
522 |
LPVOID lpBuffer; |
523 |
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, |
524 |
NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
525 |
(LPTSTR) & lpBuffer, 0, NULL ); |
526 |
fprintf(stderr, "Tap-Win32: Error ReadFile %d - %s\n", dwError, lpBuffer);
|
527 |
LocalFree( lpBuffer ); |
528 |
#endif
|
529 |
} |
530 |
} |
531 |
|
532 |
if(read_size > 0) { |
533 |
buffer->read_size = read_size; |
534 |
put_buffer_on_output_queue(overlapped, buffer); |
535 |
ReleaseSemaphore(overlapped->tap_semaphore, 1, NULL); |
536 |
buffer = get_buffer_from_free_list(overlapped); |
537 |
} |
538 |
} |
539 |
|
540 |
return 0; |
541 |
} |
542 |
|
543 |
static int tap_win32_read(tap_win32_overlapped_t *overlapped, |
544 |
uint8_t **pbuf, int max_size)
|
545 |
{ |
546 |
int size = 0; |
547 |
|
548 |
tun_buffer_t* buffer = get_buffer_from_output_queue_immediate(overlapped); |
549 |
|
550 |
if(buffer != NULL) { |
551 |
*pbuf = buffer->buffer; |
552 |
size = (int)buffer->read_size;
|
553 |
if(size > max_size) {
|
554 |
size = max_size; |
555 |
} |
556 |
} |
557 |
|
558 |
return size;
|
559 |
} |
560 |
|
561 |
static void tap_win32_free_buffer(tap_win32_overlapped_t *overlapped, |
562 |
uint8_t *pbuf) |
563 |
{ |
564 |
tun_buffer_t* buffer = (tun_buffer_t*)pbuf; |
565 |
put_buffer_on_free_list(overlapped, buffer); |
566 |
} |
567 |
|
568 |
static int tap_win32_open(tap_win32_overlapped_t **phandle, |
569 |
const char *prefered_name) |
570 |
{ |
571 |
char device_path[256]; |
572 |
char device_guid[0x100]; |
573 |
int rc;
|
574 |
HANDLE handle; |
575 |
BOOL bret; |
576 |
char name_buffer[0x100] = {0, }; |
577 |
struct {
|
578 |
unsigned long major; |
579 |
unsigned long minor; |
580 |
unsigned long debug; |
581 |
} version; |
582 |
DWORD version_len; |
583 |
DWORD idThread; |
584 |
HANDLE hThread; |
585 |
|
586 |
if (prefered_name != NULL) |
587 |
snprintf(name_buffer, sizeof(name_buffer), "%s", prefered_name); |
588 |
|
589 |
rc = get_device_guid(device_guid, sizeof(device_guid), name_buffer, sizeof(name_buffer)); |
590 |
if (rc)
|
591 |
return -1; |
592 |
|
593 |
snprintf (device_path, sizeof(device_path), "%s%s%s", |
594 |
USERMODEDEVICEDIR, |
595 |
device_guid, |
596 |
TAPSUFFIX); |
597 |
|
598 |
handle = CreateFile ( |
599 |
device_path, |
600 |
GENERIC_READ | GENERIC_WRITE, |
601 |
0,
|
602 |
0,
|
603 |
OPEN_EXISTING, |
604 |
FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, |
605 |
0 );
|
606 |
|
607 |
if (handle == INVALID_HANDLE_VALUE) {
|
608 |
return -1; |
609 |
} |
610 |
|
611 |
bret = DeviceIoControl(handle, TAP_IOCTL_GET_VERSION, |
612 |
&version, sizeof (version),
|
613 |
&version, sizeof (version), &version_len, NULL); |
614 |
|
615 |
if (bret == FALSE) {
|
616 |
CloseHandle(handle); |
617 |
return -1; |
618 |
} |
619 |
|
620 |
if (!tap_win32_set_status(handle, TRUE)) {
|
621 |
return -1; |
622 |
} |
623 |
|
624 |
tap_win32_overlapped_init(&tap_overlapped, handle); |
625 |
|
626 |
*phandle = &tap_overlapped; |
627 |
|
628 |
hThread = CreateThread(NULL, 0, tap_win32_thread_entry, |
629 |
(LPVOID)&tap_overlapped, 0, &idThread);
|
630 |
return 0; |
631 |
} |
632 |
|
633 |
/********************************************/
|
634 |
|
635 |
typedef struct TAPState { |
636 |
VLANClientState *vc; |
637 |
tap_win32_overlapped_t *handle; |
638 |
} TAPState; |
639 |
|
640 |
static void tap_cleanup(VLANClientState *vc) |
641 |
{ |
642 |
TAPState *s = vc->opaque; |
643 |
|
644 |
qemu_del_wait_object(s->handle->tap_semaphore, NULL, NULL); |
645 |
|
646 |
/* FIXME: need to kill thread and close file handle:
|
647 |
tap_win32_close(s);
|
648 |
*/
|
649 |
qemu_free(s); |
650 |
} |
651 |
|
652 |
static ssize_t tap_receive(VLANClientState *vc, const uint8_t *buf, size_t size) |
653 |
{ |
654 |
TAPState *s = vc->opaque; |
655 |
|
656 |
return tap_win32_write(s->handle, buf, size);
|
657 |
} |
658 |
|
659 |
static void tap_win32_send(void *opaque) |
660 |
{ |
661 |
TAPState *s = opaque; |
662 |
uint8_t *buf; |
663 |
int max_size = 4096; |
664 |
int size;
|
665 |
|
666 |
size = tap_win32_read(s->handle, &buf, max_size); |
667 |
if (size > 0) { |
668 |
qemu_send_packet(s->vc, buf, size); |
669 |
tap_win32_free_buffer(s->handle, buf); |
670 |
} |
671 |
} |
672 |
|
673 |
int tap_win32_init(VLANState *vlan, const char *model, |
674 |
const char *name, const char *ifname) |
675 |
{ |
676 |
TAPState *s; |
677 |
|
678 |
s = qemu_mallocz(sizeof(TAPState));
|
679 |
if (!s)
|
680 |
return -1; |
681 |
if (tap_win32_open(&s->handle, ifname) < 0) { |
682 |
printf("tap: Could not open '%s'\n", ifname);
|
683 |
return -1; |
684 |
} |
685 |
|
686 |
s->vc = qemu_new_vlan_client(vlan, model, name, NULL, tap_receive,
|
687 |
NULL, tap_cleanup, s);
|
688 |
|
689 |
snprintf(s->vc->info_str, sizeof(s->vc->info_str),
|
690 |
"tap: ifname=%s", ifname);
|
691 |
|
692 |
qemu_add_wait_object(s->handle->tap_semaphore, tap_win32_send, s); |
693 |
return 0; |
694 |
} |