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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, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "vl.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 1
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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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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);
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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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component_id,
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&len);
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256 |
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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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net_cfg_instance_id,
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&len);
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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);
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RegCloseKey (netcard_key);
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return TRUE;
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}
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274 |
}
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275 |
}
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276 |
RegCloseKey (unit_key);
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}
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++i;
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}
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280 |
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281 |
RegCloseKey (netcard_key);
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282 |
return FALSE;
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283 |
}
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284 |
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285 |
static int get_device_guid(
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286 |
char *name,
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287 |
int name_size,
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288 |
char *actual_name,
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289 |
int actual_name_size)
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290 |
{
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291 |
LONG status;
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292 |
HKEY control_net_key;
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293 |
DWORD len;
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294 |
int i = 0;
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295 |
int stop = 0;
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296 |
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297 |
status = RegOpenKeyEx(
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298 |
HKEY_LOCAL_MACHINE,
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299 |
NETWORK_CONNECTIONS_KEY,
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300 |
0,
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301 |
KEY_READ,
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302 |
&control_net_key);
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303 |
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304 |
if (status != ERROR_SUCCESS) {
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305 |
return -1;
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306 |
}
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307 |
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308 |
while (!stop)
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309 |
{
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310 |
char enum_name[256];
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311 |
char connection_string[256];
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312 |
HKEY connection_key;
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313 |
char name_data[256];
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314 |
DWORD name_type;
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315 |
const char name_string[] = "Name";
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316 |
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317 |
len = sizeof (enum_name);
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318 |
status = RegEnumKeyEx(
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319 |
control_net_key,
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320 |
i,
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321 |
enum_name,
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322 |
&len,
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323 |
NULL,
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324 |
NULL,
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325 |
NULL,
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326 |
NULL);
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327 |
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328 |
if (status == ERROR_NO_MORE_ITEMS)
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329 |
break;
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330 |
else if (status != ERROR_SUCCESS) {
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331 |
return -1;
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332 |
}
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333 |
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334 |
snprintf(connection_string,
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335 |
sizeof(connection_string),
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336 |
"%s\\%s\\Connection",
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337 |
NETWORK_CONNECTIONS_KEY, enum_name);
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338 |
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339 |
status = RegOpenKeyEx(
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340 |
HKEY_LOCAL_MACHINE,
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341 |
connection_string,
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342 |
0,
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343 |
KEY_READ,
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344 |
&connection_key);
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345 |
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346 |
if (status == ERROR_SUCCESS) {
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347 |
len = sizeof (name_data);
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348 |
status = RegQueryValueEx(
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349 |
connection_key,
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350 |
name_string,
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351 |
NULL,
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352 |
&name_type,
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353 |
name_data,
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354 |
&len);
|
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355 |
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356 |
if (status != ERROR_SUCCESS || name_type != REG_SZ) {
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357 |
return -1;
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358 |
}
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359 |
else {
|
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360 |
if (is_tap_win32_dev(enum_name)) {
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361 |
snprintf(name, name_size, "%s", enum_name);
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362 |
if (actual_name) {
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363 |
if (strcmp(actual_name, "") != 0) {
|
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364 |
if (strcmp(name_data, actual_name) != 0) {
|
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365 |
RegCloseKey (connection_key);
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366 |
++i;
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367 |
continue;
|
|
368 |
}
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|
369 |
}
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370 |
else {
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371 |
snprintf(actual_name, actual_name_size, "%s", name_data);
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|
372 |
}
|
|
373 |
}
|
|
374 |
stop = 1;
|
|
375 |
}
|
|
376 |
}
|
|
377 |
|
|
378 |
RegCloseKey (connection_key);
|
|
379 |
}
|
|
380 |
++i;
|
|
381 |
}
|
|
382 |
|
|
383 |
RegCloseKey (control_net_key);
|
|
384 |
|
|
385 |
if (stop == 0)
|
|
386 |
return -1;
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|
387 |
|
|
388 |
return 0;
|
|
389 |
}
|
|
390 |
|
|
391 |
static int tap_win32_set_status(HANDLE handle, int status)
|
|
392 |
{
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|
393 |
unsigned long len = 0;
|
|
394 |
|
|
395 |
return DeviceIoControl(handle, TAP_IOCTL_SET_MEDIA_STATUS,
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|
396 |
&status, sizeof (status),
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|
397 |
&status, sizeof (status), &len, NULL);
|
|
398 |
}
|
|
399 |
|
|
400 |
static void tap_win32_overlapped_init(tap_win32_overlapped_t* const overlapped, const HANDLE handle)
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|
401 |
{
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|
402 |
overlapped->handle = handle;
|
|
403 |
|
|
404 |
overlapped->read_event = CreateEvent(NULL, FALSE, FALSE, NULL);
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405 |
overlapped->write_event = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
406 |
|
|
407 |
overlapped->read_overlapped.Offset = 0;
|
|
408 |
overlapped->read_overlapped.OffsetHigh = 0;
|
|
409 |
overlapped->read_overlapped.hEvent = overlapped->read_event;
|
|
410 |
|
|
411 |
overlapped->write_overlapped.Offset = 0;
|
|
412 |
overlapped->write_overlapped.OffsetHigh = 0;
|
|
413 |
overlapped->write_overlapped.hEvent = overlapped->write_event;
|
|
414 |
|
|
415 |
InitializeCriticalSection(&overlapped->output_queue_cs);
|
|
416 |
InitializeCriticalSection(&overlapped->free_list_cs);
|
|
417 |
|
|
418 |
overlapped->output_queue_semaphore = CreateSemaphore(
|
|
419 |
NULL, // default security attributes
|
|
420 |
0, // initial count
|
|
421 |
TUN_MAX_BUFFER_COUNT, // maximum count
|
|
422 |
NULL); // unnamed semaphore
|
|
423 |
|
|
424 |
if(!overlapped->output_queue_semaphore) {
|
|
425 |
fprintf(stderr, "error creating output queue semaphore!\n");
|
|
426 |
}
|
|
427 |
|
|
428 |
overlapped->free_list_semaphore = CreateSemaphore(
|
|
429 |
NULL, // default security attributes
|
|
430 |
TUN_MAX_BUFFER_COUNT, // initial count
|
|
431 |
TUN_MAX_BUFFER_COUNT, // maximum count
|
|
432 |
NULL); // unnamed semaphore
|
|
433 |
|
|
434 |
if(!overlapped->free_list_semaphore) {
|
|
435 |
fprintf(stderr, "error creating free list semaphore!\n");
|
|
436 |
}
|
|
437 |
|
|
438 |
overlapped->free_list = overlapped->output_queue_front = overlapped->output_queue_back = NULL;
|
|
439 |
|
|
440 |
{
|
|
441 |
unsigned index;
|
|
442 |
for(index = 0; index < TUN_MAX_BUFFER_COUNT; index++) {
|
|
443 |
tun_buffer_t* element = &overlapped->buffers[index];
|
|
444 |
element->next = overlapped->free_list;
|
|
445 |
overlapped->free_list = element;
|
|
446 |
}
|
|
447 |
}
|
|
448 |
}
|
|
449 |
|
|
450 |
static int tap_win32_write(tap_win32_overlapped_t *overlapped,
|
|
451 |
const void *buffer, unsigned long size)
|
|
452 |
{
|
|
453 |
unsigned long write_size;
|
|
454 |
BOOL result;
|
|
455 |
DWORD error;
|
|
456 |
|
|
457 |
result = GetOverlappedResult( overlapped->handle, &overlapped->write_overlapped,
|
|
458 |
&write_size, FALSE);
|
|
459 |
|
|
460 |
if (!result && GetLastError() == ERROR_IO_INCOMPLETE)
|
|
461 |
WaitForSingleObject(overlapped->write_event, INFINITE);
|
|
462 |
|
|
463 |
result = WriteFile(overlapped->handle, buffer, size,
|
|
464 |
&write_size, &overlapped->write_overlapped);
|
|
465 |
|
|
466 |
if (!result) {
|
|
467 |
switch (error = GetLastError())
|
|
468 |
{
|
|
469 |
case ERROR_IO_PENDING:
|
|
470 |
#ifndef TUN_ASYNCHRONOUS_WRITES
|
|
471 |
WaitForSingleObject(overlapped->write_event, INFINITE);
|
|
472 |
#endif
|
|
473 |
break;
|
|
474 |
default:
|
|
475 |
return -1;
|
|
476 |
}
|
|
477 |
}
|
|
478 |
|
|
479 |
return 0;
|
|
480 |
}
|
|
481 |
|
|
482 |
static DWORD WINAPI tap_win32_thread_entry(LPVOID param)
|
|
483 |
{
|
|
484 |
tap_win32_overlapped_t *overlapped = (tap_win32_overlapped_t*)param;
|
|
485 |
unsigned long read_size;
|
|
486 |
BOOL result;
|
|
487 |
DWORD dwError;
|
|
488 |
tun_buffer_t* buffer = get_buffer_from_free_list(overlapped);
|
|
489 |
|
|
490 |
|
|
491 |
for (;;) {
|
|
492 |
result = ReadFile(overlapped->handle,
|
|
493 |
buffer->buffer,
|
|
494 |
sizeof(buffer->buffer),
|
|
495 |
&read_size,
|
|
496 |
&overlapped->read_overlapped);
|
|
497 |
if (!result) {
|
|
498 |
dwError = GetLastError();
|
|
499 |
if (dwError == ERROR_IO_PENDING) {
|
|
500 |
WaitForSingleObject(overlapped->read_event, INFINITE);
|
|
501 |
result = GetOverlappedResult( overlapped->handle, &overlapped->read_overlapped,
|
|
502 |
&read_size, FALSE);
|
|
503 |
if (!result) {
|
|
504 |
#if DEBUG_TAP_WIN32
|
|
505 |
LPVOID lpBuffer;
|
|
506 |
dwError = GetLastError();
|
|
507 |
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
|
|
508 |
NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
|
509 |
(LPTSTR) & lpBuffer, 0, NULL );
|
|
510 |
fprintf(stderr, "Tap-Win32: Error GetOverlappedResult %d - %s\n", dwError, lpBuffer);
|
|
511 |
LocalFree( lpBuffer );
|
|
512 |
#endif
|
|
513 |
}
|
|
514 |
} else {
|
|
515 |
#if DEBUG_TAP_WIN32
|
|
516 |
LPVOID lpBuffer;
|
|
517 |
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
|
|
518 |
NULL, dwError, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
|
519 |
(LPTSTR) & lpBuffer, 0, NULL );
|
|
520 |
fprintf(stderr, "Tap-Win32: Error ReadFile %d - %s\n", dwError, lpBuffer);
|
|
521 |
LocalFree( lpBuffer );
|
|
522 |
#endif
|
|
523 |
}
|
|
524 |
}
|
|
525 |
|
|
526 |
if(read_size > 0) {
|
|
527 |
buffer->read_size = read_size;
|
|
528 |
put_buffer_on_output_queue(overlapped, buffer);
|
|
529 |
buffer = get_buffer_from_free_list(overlapped);
|
|
530 |
}
|
|
531 |
}
|
|
532 |
|
|
533 |
return 0;
|
|
534 |
}
|
|
535 |
|
|
536 |
static int tap_win32_read(tap_win32_overlapped_t *overlapped,
|
|
537 |
uint8_t **pbuf, int max_size)
|
|
538 |
{
|
|
539 |
int size = 0;
|
|
540 |
|
|
541 |
tun_buffer_t* buffer = get_buffer_from_output_queue_immediate(overlapped);
|
|
542 |
|
|
543 |
if(buffer != NULL) {
|
|
544 |
*pbuf = buffer->buffer;
|
|
545 |
size = (int)buffer->read_size;
|
|
546 |
if(size > max_size) {
|
|
547 |
size = max_size;
|
|
548 |
}
|
|
549 |
}
|
|
550 |
|
|
551 |
return size;
|
|
552 |
}
|
|
553 |
|
|
554 |
static void tap_win32_free_buffer(tap_win32_overlapped_t *overlapped,
|
|
555 |
char* pbuf)
|
|
556 |
{
|
|
557 |
tun_buffer_t* buffer = (tun_buffer_t*)pbuf;
|
|
558 |
put_buffer_on_free_list(overlapped, buffer);
|
|
559 |
}
|
|
560 |
|
|
561 |
static int tap_win32_open(tap_win32_overlapped_t **phandle,
|
|
562 |
const char *prefered_name)
|
|
563 |
{
|
|
564 |
char device_path[256];
|
|
565 |
char device_guid[0x100];
|
|
566 |
int rc;
|
|
567 |
HANDLE handle;
|
|
568 |
BOOL bret;
|
|
569 |
char name_buffer[0x100] = {0, };
|
|
570 |
struct {
|
|
571 |
unsigned long major;
|
|
572 |
unsigned long minor;
|
|
573 |
unsigned long debug;
|
|
574 |
} version;
|
|
575 |
LONG version_len;
|
|
576 |
DWORD idThread;
|
|
577 |
HANDLE hThread;
|
|
578 |
|
|
579 |
if (prefered_name != NULL)
|
|
580 |
snprintf(name_buffer, sizeof(name_buffer), "%s", prefered_name);
|
|
581 |
|
|
582 |
rc = get_device_guid(device_guid, sizeof(device_guid), name_buffer, sizeof(name_buffer));
|
|
583 |
if (rc)
|
|
584 |
return -1;
|
|
585 |
|
|
586 |
snprintf (device_path, sizeof(device_path), "%s%s%s",
|
|
587 |
USERMODEDEVICEDIR,
|
|
588 |
device_guid,
|
|
589 |
TAPSUFFIX);
|
|
590 |
|
|
591 |
handle = CreateFile (
|
|
592 |
device_path,
|
|
593 |
GENERIC_READ | GENERIC_WRITE,
|
|
594 |
0,
|
|
595 |
0,
|
|
596 |
OPEN_EXISTING,
|
|
597 |
FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED,
|
|
598 |
0 );
|
|
599 |
|
|
600 |
if (handle == INVALID_HANDLE_VALUE) {
|
|
601 |
return -1;
|
|
602 |
}
|
|
603 |
|
|
604 |
bret = DeviceIoControl(handle, TAP_IOCTL_GET_VERSION,
|
|
605 |
&version, sizeof (version),
|
|
606 |
&version, sizeof (version), &version_len, NULL);
|
|
607 |
|
|
608 |
if (bret == FALSE) {
|
|
609 |
CloseHandle(handle);
|
|
610 |
return -1;
|
|
611 |
}
|
|
612 |
|
|
613 |
if (!tap_win32_set_status(handle, TRUE)) {
|
|
614 |
return -1;
|
|
615 |
}
|
|
616 |
|
|
617 |
tap_win32_overlapped_init(&tap_overlapped, handle);
|
|
618 |
|
|
619 |
*phandle = &tap_overlapped;
|
|
620 |
|
|
621 |
hThread = CreateThread(NULL, 0, tap_win32_thread_entry,
|
|
622 |
(LPVOID)&tap_overlapped, 0, &idThread);
|
|
623 |
SetThreadPriority(hThread,THREAD_PRIORITY_TIME_CRITICAL);
|
|
624 |
|
|
625 |
return 0;
|
|
626 |
}
|
|
627 |
|
|
628 |
/********************************************/
|
|
629 |
|
|
630 |
typedef struct TAPState {
|
|
631 |
VLANClientState *vc;
|
|
632 |
tap_win32_overlapped_t *handle;
|
|
633 |
} TAPState;
|
|
634 |
|
|
635 |
static TAPState *tap_win32_state = NULL;
|
|
636 |
|
|
637 |
static void tap_receive(void *opaque, const uint8_t *buf, int size)
|
|
638 |
{
|
|
639 |
TAPState *s = opaque;
|
|
640 |
|
|
641 |
tap_win32_write(s->handle, buf, size);
|
|
642 |
}
|
|
643 |
|
|
644 |
/* XXX: horrible, suppress this by using proper thread signaling */
|
|
645 |
void tap_win32_poll(void)
|
|
646 |
{
|
|
647 |
TAPState *s = tap_win32_state;
|
|
648 |
uint8_t *buf;
|
|
649 |
int max_size = 4096;
|
|
650 |
int size;
|
|
651 |
|
|
652 |
if (!s)
|
|
653 |
return;
|
|
654 |
|
|
655 |
size = tap_win32_read(s->handle, &buf, max_size);
|
|
656 |
if (size > 0) {
|
|
657 |
qemu_send_packet(s->vc, buf, size);
|
|
658 |
tap_win32_free_buffer(s->handle, buf);
|
|
659 |
}
|
|
660 |
}
|
|
661 |
|
|
662 |
int tap_win32_init(VLANState *vlan, const char *ifname)
|
|
663 |
{
|
|
664 |
TAPState *s;
|
|
665 |
|
|
666 |
s = qemu_mallocz(sizeof(TAPState));
|
|
667 |
if (!s)
|
|
668 |
return -1;
|
|
669 |
if (tap_win32_open(&s->handle, ifname) < 0) {
|
|
670 |
printf("tap: Could not open '%s'\n", ifname);
|
|
671 |
return -1;
|
|
672 |
}
|
|
673 |
|
|
674 |
s->vc = qemu_new_vlan_client(vlan, tap_receive, s);
|
|
675 |
|
|
676 |
snprintf(s->vc->info_str, sizeof(s->vc->info_str),
|
|
677 |
"tap: ifname=%s", ifname);
|
|
678 |
tap_win32_state = s;
|
|
679 |
return 0;
|
|
680 |
}
|