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Import Upstream version 1.0.3

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This commit is contained in:
Guus Sliepen 2019-08-26 13:44:36 +02:00
parent ed8d36a434
commit c12028eeaa
196 changed files with 43077 additions and 32886 deletions
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76
src/mingw/common.h Normal file
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/*
* TAP-Win32 -- A kernel driver to provide virtual tap device functionality
* on Windows. Originally derived from the CIPE-Win32
* project by Damion K. Wilson, with extensive modifications by
* James Yonan.
*
* All source code which derives from the CIPE-Win32 project is
* Copyright (C) Damion K. Wilson, 2003, and is released under the
* GPL version 2 (see below).
*
* All other source code is Copyright (C) James Yonan, 2003-2004,
* and is released under the GPL version 2 (see below).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//===============================================
// This file is included both by OpenVPN and
// the TAP-Win32 driver and contains definitions
// common to both.
//===============================================
//=============
// TAP IOCTLs
//=============
#define TAP_CONTROL_CODE(request,method) \
CTL_CODE (FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS)
#define TAP_IOCTL_GET_MAC TAP_CONTROL_CODE (1, METHOD_BUFFERED)
#define TAP_IOCTL_GET_VERSION TAP_CONTROL_CODE (2, METHOD_BUFFERED)
#define TAP_IOCTL_GET_MTU TAP_CONTROL_CODE (3, METHOD_BUFFERED)
#define TAP_IOCTL_GET_INFO TAP_CONTROL_CODE (4, METHOD_BUFFERED)
#define TAP_IOCTL_CONFIG_POINT_TO_POINT TAP_CONTROL_CODE (5, METHOD_BUFFERED)
#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE (6, METHOD_BUFFERED)
#define TAP_IOCTL_CONFIG_DHCP_MASQ TAP_CONTROL_CODE (7, METHOD_BUFFERED)
#define TAP_IOCTL_GET_LOG_LINE TAP_CONTROL_CODE (8, METHOD_BUFFERED)
#define TAP_IOCTL_CONFIG_DHCP_SET_OPT TAP_CONTROL_CODE (9, METHOD_BUFFERED)
//=================
// Registry keys
//=================
#define ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
#define NETWORK_CONNECTIONS_KEY "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
//======================
// Filesystem prefixes
//======================
#define USERMODEDEVICEDIR "\\\\.\\Global\\"
#define SYSDEVICEDIR "\\Device\\"
#define USERDEVICEDIR "\\DosDevices\\Global\\"
#define TAPSUFFIX ".tap"
//=========================================================
// TAP_COMPONENT_ID -- This string defines the TAP driver
// type -- different component IDs can reside in the system
// simultaneously.
//=========================================================
#define TAP_COMPONENT_ID "tap0801"

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src/mingw/device.c Normal file
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/*
device.c -- Interaction with Windows tap driver in a MinGW environment
Copyright (C) 2002-2004 Ivo Timmermans <ivo@tinc-vpn.org>,
2002-2004 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: device.c 1400 2004-11-01 17:02:19Z guus $
*/
#include "system.h"
#include <windows.h>
#include <winioctl.h>
#include "conf.h"
#include "logger.h"
#include "net.h"
#include "route.h"
#include "utils.h"
#include "xalloc.h"
#include "mingw/common.h"
int device_fd = 0;
static HANDLE device_handle = INVALID_HANDLE_VALUE;
char *device = NULL;
char *iface = NULL;
char *device_info = NULL;
static int device_total_in = 0;
static int device_total_out = 0;
extern char *myport;
DWORD WINAPI tapreader(void *bla) {
int sock, err, status;
struct addrinfo *ai;
struct addrinfo hint = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_DGRAM,
.ai_protocol = IPPROTO_UDP,
.ai_flags = 0,
};
char buf[MTU];
long len;
OVERLAPPED overlapped;
/* Open a socket to the parent process */
err = getaddrinfo(NULL, myport, &hint, &ai);
if(err || !ai) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno));
return -1;
}
sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
freeaddrinfo(ai);
if(sock < 0) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno));
return -1;
}
if(connect(sock, ai->ai_addr, ai->ai_addrlen)) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "connect", strerror(errno));
return -1;
}
logger(LOG_DEBUG, _("Tap reader running"));
/* Read from tap device and send to parent */
overlapped.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
for(;;) {
overlapped.Offset = 0;
overlapped.OffsetHigh = 0;
ResetEvent(overlapped.hEvent);
status = ReadFile(device_handle, buf, sizeof(buf), &len, &overlapped);
if(!status) {
if(GetLastError() == ERROR_IO_PENDING) {
WaitForSingleObject(overlapped.hEvent, INFINITE);
if(!GetOverlappedResult(device_handle, &overlapped, &len, FALSE))
continue;
} else {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return -1;
}
}
if(send(sock, buf, len, 0) <= 0)
return -1;
}
}
bool setup_device(void)
{
HKEY key, key2;
int i;
char regpath[1024];
char adapterid[1024];
char adaptername[1024];
char tapname[1024];
long len;
unsigned long status;
bool found = false;
int sock, err;
HANDLE thread;
struct addrinfo *ai;
struct addrinfo hint = {
.ai_family = AF_UNSPEC,
.ai_socktype = SOCK_DGRAM,
.ai_protocol = IPPROTO_UDP,
.ai_flags = 0,
};
cp();
get_config_string(lookup_config(config_tree, "Device"), &device);
get_config_string(lookup_config(config_tree, "Interface"), &iface);
/* Open registry and look for network adapters */
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key)) {
logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError()));
return false;
}
for (i = 0; ; i++) {
len = sizeof(adapterid);
if(RegEnumKeyEx(key, i, adapterid, &len, 0, 0, 0, NULL))
break;
/* Find out more about this adapter */
snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, regpath, 0, KEY_READ, &key2))
continue;
len = sizeof(adaptername);
err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
RegCloseKey(key2);
if(err)
continue;
if(device) {
if(!strcmp(device, adapterid)) {
found = true;
break;
} else
continue;
}
if(iface) {
if(!strcmp(iface, adaptername)) {
found = true;
break;
} else
continue;
}
snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
if(device_handle != INVALID_HANDLE_VALUE) {
found = true;
break;
}
}
RegCloseKey(key);
if(!found) {
logger(LOG_ERR, _("No Windows tap device found!"));
return false;
}
if(!device)
device = xstrdup(adapterid);
if(!iface)
iface = xstrdup(adaptername);
/* Try to open the corresponding tap device */
if(device_handle == INVALID_HANDLE_VALUE) {
snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device);
device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
}
if(device_handle == INVALID_HANDLE_VALUE) {
logger(LOG_ERR, _("%s (%s) is not a usable Windows tap device: %s"), device, iface, winerror(GetLastError()));
return false;
}
/* Get MAC address from tap device */
if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
logger(LOG_ERR, _("Could not get MAC address from Windows tap device %s (%s): %s"), device, iface, winerror(GetLastError()));
return false;
}
if(routing_mode == RMODE_ROUTER) {
overwrite_mac = 1;
}
/* Create a listening socket */
err = getaddrinfo(NULL, myport, &hint, &ai);
if(err || !ai) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "getaddrinfo", gai_strerror(errno));
return false;
}
sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
if(sock < 0) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "socket", strerror(errno));
return false;
}
if(bind(sock, ai->ai_addr, ai->ai_addrlen)) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "bind", strerror(errno));
return false;
}
freeaddrinfo(ai);
if(listen(sock, 1)) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "listen", strerror(errno));
return false;
}
/* Start the tap reader */
thread = CreateThread(NULL, 0, tapreader, NULL, 0, NULL);
if(!thread) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "CreateThread", winerror(GetLastError()));
return false;
}
/* Wait for the tap reader to connect back to us */
if((device_fd = accept(sock, NULL, 0)) == -1) {
logger(LOG_ERR, _("System call `%s' failed: %s"), "accept", strerror(errno));
return false;
}
closesocket(sock);
/* Set media status for newer TAP-Win32 devices */
status = true;
DeviceIoControl(device_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL);
device_info = _("Windows tap device");
logger(LOG_INFO, _("%s (%s) is a %s"), device, iface, device_info);
return true;
}
void close_device(void)
{
cp();
CloseHandle(device_handle);
}
bool read_packet(vpn_packet_t *packet)
{
int lenin;
cp();
if((lenin = recv(device_fd, packet->data, MTU, 0)) <= 0) {
logger(LOG_ERR, _("Error while reading from %s %s: %s"), device_info,
device, strerror(errno));
return false;
}
packet->len = lenin;
device_total_in += packet->len;
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Read packet of %d bytes from %s"), packet->len,
device_info);
return true;
}
bool write_packet(vpn_packet_t *packet)
{
long lenout;
OVERLAPPED overlapped = {0};
cp();
ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
packet->len, device_info);
if(!WriteFile(device_handle, packet->data, packet->len, &lenout, &overlapped)) {
logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
return false;
}
device_total_out += packet->len;
return true;
}
void dump_device_stats(void)
{
cp();
logger(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
logger(LOG_DEBUG, _(" total bytes in: %10d"), device_total_in);
logger(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
}