I just git libnet project from https://github.com/sam-github/libnet/tree/master/libnet and i have been looking over the example source provided with it.the example obtain a cmd arg called "device" to initialize libnet. I figured out "eth0" is the proper value on Linux OS but I'm using windows 7 and my question is what can i use as value for device on windows.
l = libnet_init(
LIBNET_RAW4, /* injection type */
device, /* network interface */
errbuf); /* errbuf */
I tried a lots of values like adaptor name, device index, etc... but every time i got this error:
libnet_init() failed: libnet_link_win32.c(): unable to open the driver, error Code : 14
I was confused by the same problem.
It can be solve like this.
in lib wpcap
there is a function named pcap_findalldevs();
use it like this and you will succuss
int Value = pcap_findalldevs(&alldevs,errbuf);
if( Value == -1)
{
fprintf(stderr,"Error in pcap_findalldevs: %s\n", errbuf);
exit(1);
}
char *device = NULL;
device = alldevs->name; //get the first Card name
libnet_t *l
l = libnet_init(
LIBNET_LINK_ADV,
device,//use it here
error_information);
may this help you. good luck!
Related
We have some custom driver working on 5.4.0. It's pretty old and the original developers are no longer supporting it, so we have to maintain it in our systems.
When upgrading to Ubuntu 22 (Kernel 5.15), the driver suddenly stopped working, and sending ioctl with the command SIOCDEVPRIVATE (which used to work in kernel 5.4.0, and in fact is used to get some necessary device information)now gives "ioctl: Operation not supported" error with no extra information anywhere on the logs.
So... has something changed between those two kernels? We did have to adapt some of the structures used to register the driver, but I can't see anything concerning registering valid operations there. Do I have to register valid operations somewhere now?
Alternatively, does somebody know what part of the kernel code is checking for the operation to be supported? I've been trying to find it from ioctl.c, but I can't seem to find where that particular error comes from.
The driver code that supposedly takes care of this (doesn't even reach first line on 5.15):
static int u50_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) {
struct u50_priv *priv = netdev_priv(dev);
if (cmd == SIOCDEVPRIVATE) {
memcpy(&ifr->ifr_data, priv->tty->name, strlen(priv->tty->name));
}
return 0;
}
And the attempt to access it that does no longer work:
struct ifreq ifr = {0};
struct ifaddrs *ifaddr, *ifa;
getifaddrs(&ifaddr);
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
memcpy(ifr.ifr_name, ifa->ifa_name, IFNAMSIZ);
if (ioctl(lonsd, SIOCDEVPRIVATE, &ifr) < 0) {
perror("ioctl");
syslog(LOG_ERR, "Ioctl:%d: %s\n", __LINE__, strerror(errno));
}
...
and structure for registration
static const struct net_device_ops u50_netdev_ops = {
.ndo_init = u50_dev_init,
.ndo_uninit = u50_dev_uninit,
.ndo_open = u50_dev_open,
.ndo_stop = u50_dev_stop,
.ndo_start_xmit = u50_dev_xmit,
.ndo_do_ioctl = u50_dev_ioctl,
.ndo_set_mac_address = U50SetHWAddr,
};
If you need some code to respond to SIOCDEVPRIVATE, you used to be able to do it via ndo_do_ioctl (writing a compatible function, then linking it in a net_device_ops struct in 5.4). However, in 5.15 it was changed so now you have to implement a ndo_siocdevprivate function, rather than ndo_do_ioctl, which is no longer called, according to the kernel documentation.
source:
https://elixir.bootlin.com/linux/v5.15.57/source/include/linux/netdevice.h
Patch that did this: spinics.net/lists/netdev/msg698158.html
Please can anyone give me direct for realization next functional for Windows.
I have USB device which connects to the PC (it is JTAG programmer.) I know VID and PID of this hardware. I need:
1 Check what type of driver this hardware use (detecting winusb driver or not will be enough. Maybe do I need to read registry?)
2 If driver is not winusb I need to install winusb driver for this USB device from my application.
The current driver assigned to the device is stored in the registry, so you could read it directly from there. However, it is probably better to use SetupAPI, an API provided by Microsoft. The function to call is SetupDiGetDeviceRegistryProperty, and the third argument should be SPDRP_SERVICE. This will return the name of the driver as a string. Note that you will need to call several other SetupAPI functions before you have all the pieces of info you need to call SetupDiGetDeviceRegistryProperty.
I have not tried it, but libwdi has features for installing WinUSB onto a device node. It might also have functions for getting the current driver, so you should try using it before you spend too much time learning SetupAPI. The devcon utility from Microsoft (which is open source now) might be another option.
Without knowing the details of what you are doing, I question whether you really need to do this. It might be simpler to provide a signed driver package to users and instruct them to use the "Update Driver Software..." option from the Device Manager to apply it to particular device.
I made first part of task.
#ifdef Q_OS_WIN
DEFINE_GUID(GUID_DEVCLASS_WINUSB,0x88BAE032,0x5A81,0x49f0,
0xBC,0x3D,0xA4,0xFF,0x13,0x82,0x16,0xD6);
#endif
bool WinUSB::isWinUsbDriver(quint16 vid, quint16 pid)
{
#ifndef Q_OS_WIN
Q_UNUSED(vid);
Q_UNUSED(pid);
return true;
#else
HDEVINFO deviceInfoSet;
GUID *guidDev = (GUID*) &GUID_DEVCLASS_WINUSB;
deviceInfoSet = SetupDiGetClassDevs(guidDev, NULL, NULL, DIGCF_PRESENT | DIGCF_PROFILE);
DWORD buffersize =4000;
TCHAR buffer [buffersize];
int memberIndex = 0;
bool retval = false;
QString vidPid;
vidPid = "VID_" + QString("%1").arg(vid,4,16,QChar('0')) + "&";
vidPid += "PID_" + QString("%1").arg(pid,4,16,QChar('0'));
while (true)
{
SP_DEVINFO_DATA deviceInfoData;
ZeroMemory(&deviceInfoData, sizeof(SP_DEVINFO_DATA));
deviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
if (SetupDiEnumDeviceInfo(deviceInfoSet, memberIndex, &deviceInfoData) == FALSE) {
if (GetLastError() == ERROR_NO_MORE_ITEMS) {
break;
}
}
DWORD nSize=0 ;
SetupDiGetDeviceInstanceId (deviceInfoSet, &deviceInfoData, buffer, sizeof(buffer), &nSize);
buffer [nSize] ='\0';
QString str = QString::fromWCharArray(buffer);
if (str.indexOf(vidPid) >= 0) {
retval = true;
break;
}
memberIndex++;
}
if (deviceInfoSet) {
SetupDiDestroyDeviceInfoList(deviceInfoSet);
}
return retval;
#endif
}
I am installing a new newbuf driver on FreeBSD 10.0 . After compiling with make the driver.ko file has been created and than kldload can load successfully. kldload returns 0 and I can see the device at the kldstat output. When attempt to use the driver opening the /dev/** file, the file is not exist.
I think that this /dev/** file should be created by make_dev function which is located in device_attach member method. To test if the kldload reaches this attaching function; when write printf and uprintf to debug the driver, I can not see any output at console nor dmesg output.
But the problem is after writing printf at beginnings (after local variable definitions) of device_identify and device_probe functions, I can't see any output again at console nor dmesg.
My question is that even if the physical driver has problem (not located etc.), should I see the ouput of printf at the device_identify member function which is called by kldload at starting course (I think)?
Do I have a mistake when debugging newbuf driver with printf (I also tried a hello_world device driver and at this driver I can take output of printf at dmesg)?
Mainly how can I test/debug this driver's kldload processes?
Below some parts of my driver code (I think at least I should see MSG1, but I can not see):
struct mydrv_softc
{
device_t dev;
};
static devclass_t mydrv_devclass;
static struct cdevsw mydrv_cdevsw = {
.d_version = D_VERSION,
.d_name = "mydrv",
.d_flags = D_NEEDGIANT,
.d_open = mydrv_open,
.d_close = mydrv_close,
.d_ioctl = mydrv_ioctl,
.d_write = mydrv_write,
.d_read = mydrv_read
};
static void mydrv_identify (driver_t *driver, device_t parent) {
devclass_t dc;
device_t child;
printf("MSG1: The process inside the identfy function.");
dc = devclass_find("mydrv");
if (devclass_get_device(dc, 0) == NULL) {
child = BUS_ADD_CHILD(parent, 0, "mydrv", -1);
}
}
static int mydrv_probe(device_t dev) {
printf("MSG2: The process inside the probe function.");
mydrv_init();
if (device_get_unit(dev) != 0)
return (ENXIO);
device_set_desc(dev, "FreeBSD Device Driver");
return (0);
}
static int mydrv_attach(device_t dev) {
struct mydrv_softc *sc;
device_printf(dev, "MSG3: The process will make attachment.");
sc = (struct mydrv_softc *) device_get_softc(dev);
sc->dev = (device_t)make_dev(&mydrv_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, "mydrv_drv");
return 0;
}
static int mydrv_detach(device_t dev) {
struct mydrv_softc *sc;
sc = (struct mydrv_softc *) device_get_softc(dev);
destroy_dev((struct cdev*)(sc->dev));
bus_generic_detach(dev);
return 0;
}
static device_method_t mydrv_methods[] = {
DEVMETHOD(device_identify, mydrv_identify),
DEVMETHOD(device_probe, mydrv_probe),
DEVMETHOD(device_attach, mydrv_attach),
DEVMETHOD(device_detach, mydrv_detach),
{ 0, 0 }
};
static driver_t mydrv_driver = {
"mydrv",
mydrv_methods,
sizeof(struct mydrv_softc),
};
DRIVER_MODULE(mydrv, ppbus, mydrv_driver, mydrv_devclass, 0, 0);
If you don't see your printf's output on your console then your device functions will probably not be called. Can you show us your module's code?
Have you used DRIVER_MODULE() or DEV_MODULE()?
What parent bus are you using?
I guess printf works fine, but I prefer to use device_printf as it also prints the device name, and will be easier when looking through logs or dmesg output. Also leave multiple debug prints and check the log files on your system. Most logs for the device drivers are logged in /var/log/messages. But check other log files too.
Are you running your code on a virtual machine? Some device drivers don't show up their device files in /dev if the OS is running on a virtual machine. You should probably run your OS on actual hardware for the device file to show up.
As far as I know, you can't see the output in dmesg if you cannot find the corresponding device file in /dev but you may have luck with logs as I mentioned.
The easiest way to debug is of course using the printf statements. Other than this, you can debug the kernel using gdb running on another system. I am not familiar with the exact process but I know you can do this. Google it.
the device driver I'm working on is implementing a virtual device. The logic
is as follows:
static struct net_device_ops virt_net_ops = {
.ndo_init = virt_net_init,
.ndo_open = virt_net_open,
.ndo_stop = virt_net_stop,
.ndo_do_ioctl = virt_net_ioctl,
.ndo_get_stats = virt_net_get_stats,
.ndo_start_xmit = virt_net_start_xmit,
};
...
struct net_device *dev;
struct my_dev *virt;
dev = alloc_netdev(..);
/* check for NULL */
virt = netdev_priv(dev);
dev->netdev_ops = &virt_net_ops;
SET_ETHTOOL_OPS(dev, &virt_ethtool_ops);
dev_net_set(dev, net);
virt->magic = MY_VIRT_DEV_MAGIC;
ret = register_netdev(dev);
if (ret) {
printk("register_netdev failed\n");
free_netdev(dev);
return ret;
}
...
What happens is that somewhere somehow the pointer net_device_ops in
'net_dev' gets corrupted, i.e.
1) create the device the first time (allocated net_dev, init the fields
including net_device_ops,which is
initialized with a static structure containing function pointers), register
the device with the kernel invoking register_netdev() - OK
2) attempt to create the device with the same name again, repeat the above
steps, call register_netdev() which will return negative and we
free_netdev(dev) and return error to the caller.
And between these two events the pointer to net_device_ops has changed,
although nowhere in the code it is done explicitly except the initialization
phase.
The kernel version is 2.6.31.8, platform MIPS. Communication channel between the user space and the kernel is implemented via netlink sockets.
Could anybody suggest what possibly can go wrong?
Appreciate any advices, thanks.
Mark
"The bug is somewhere else. "
The second device should not interact with the existing one. If you register_netdev with an existing name, nevertheless the ndo_init virtual function is called first before the condition is detected and -EEXIST is returned. Maybe your init function does something nasty involving some global variables. (For example, does the code assume there is one device, and stash a global pointer to it during initialization?)
How do I get from a drive letter to a device instance ID?
My process starts with a device arrival message. I have been successful in getting the drive letter from the arrival message and in opening the dvd tray.
I have searched the various Setup API items; but I haven't found anything that gets me from a drive letter to a device instance ID.
A solution in C# or VB.NET would be ideal, but I'm willing to figure it out from any other language as long as I can see the API calls.
Thanks in advance...
You cannot do it directly.
The link is to use STORAGE_DEVICE_NUMBER. You can use DeviceIoControl with IOCTL_STORAGE_GET_DEVICE_NUMBER on your device name to populate this structure. Put this value to one side.
You then need to get device infomation on your system using SetupDiGetClassDevs setting the GUIDS as approriate, indicicating the drives your are insterested in. Then enumerate through the devices using SetupDiEnumDeviceInfo. Then enumerate the interfaces using SetupDiEnumDeviceInterfaces and finally get the information using SetupDiGetDeviceInterfaceDetail. In this structure returned you can get a DevicePath you can use to get the STORAGE_DEVICE_NUMBER as above. Match this with the STORAGE_DEVICE_NUMBER from your drive letter, and you have now linked a driver letter to your structure. Phew! Inside this structure is a DevInst.
i know it's late for you now but not for everybody ^^
I had the same need and this is main line of how I did it:
-You need a window to receive device arrival and removal (as you said)
-Then you create a DeviceNotificationFilter initiated to dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE
-Then in the message loop of your window you look for VM_DEVICECHANGE
-When u receive it if wParam == DBT_DEVICEARRIVAL, use the lParam to check if it is a DBT_DEVTYPE_VOLUME (i was getting the letter and the type of the drive here) or a DBT_DEVTYPE_DEVICEINTERFACE ( there you can use your wellcasted lParam to get the InstanceId from the input structure).
When you connect a drive your receive DEVINTERFACE first then the other.
I only give the main line beacause i did this long time ago and i don't have the code here, and also I had found a lot of code pieces on the net (long time ago so there should be more now ^^^) maybe msdn give a full code example to do that now.
If you read this and need more informations, i'll reply or make a full documented answer if many need it.
Hope it will help some of you.
I know it's years later but I had to do this and searching brought me here and #DanDan 's answer worked. In order to save future people a lot of work, I thought I'd give back a little and present the technique a bit more explicitly. You'll still have to write a bit of code, but the part I found difficult is below as code:
As DanDan mentioned, the idea is to use CreateFile and DeviceIoControl to get the Windows STORAGE_DEVICE_NUMBER for the disk associated with a file path, and then use the Setup API to enumerate disk devices until we find one whose device instance equals the SDN.
First, here's a summary of how you get the STORAGE_DEVICE_NUMBER from the path (e.g. c:\\users\\bob);
Strip the path to the root (e.g down to C:) and prepend it with \\\\.\\ so you have \\\\.\\C:
Open that path up using CreateFileW with to get metadata
Use DeviceIoControl with IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS to get the extents
Get the DiskNumber member from the first extent returned.
Close the file
Open up \\\\.\\PhysicalDrive<n> where <n> is the that DiskNumber from the first extent
Use DeviceIoControl with code IOCTL_STORAGE_GET_DEVICE_NUMBER to get make it fill out a STORAGE_DEVICE_NUMBER struct as output
Use SetupDiGetClassDevs with arguments &GUID_DEVCLASS_DISKDRIVE and DICGF_PRESENT to get all disks on the system
In a loop, use SetupDiEnumDeviceInfo to get a SP_DEVINFO_DATA repeatedly (on the device list returned by step #8 above) and a call the function below to determine which one, if any, matches the STORAGE_DEVICE_NUMBER for the give path.
(This is edited to remove custom utility classes of mine right on the SO web page so I might have introduced errors/typos)
bool DoesDeviceInstanceEqualStorageDeviceNumber(
const std::string& devInstance,
STORAGE_DEVICE_NUMBER sdn)
{
// Open up this device instance, specifying that we want the *interfaces*.
// The interfaces are key key because examining them will let us get a
// string we can use the Win32 CreateFile function.
const auto hDevInfo = SetupDiGetClassDevsA(
nullptr,
devInstance.c_str(),
nullptr,
DIGCF_DEVICEINTERFACE | DIGCF_ALLCLASSES);
if (hDevInfo == INVALID_HANDLE_VALUE)
throws std::runtime_error("Unable to get disk devices");
DWORD dwSize = 0;
SP_DEVINFO_DATA did;
WCHAR buffer[4096];
did.cbSize = sizeof (did);
bool foundValidMatch = false;
int deviceNumber = 0;
// Iterate through all such devices, looking for one that has a storage device number that matches the given one.
while ( !foundValidMatch && SetupDiEnumDeviceInfo(hDevInfo, deviceNumber, &did))
{
deviceNumber++;
DEVPROPTYPE devPropType;
// We'll only bother comparing this one if it is fixed. Determine that.
const auto getPropResult = SetupDiGetDevicePropertyW (
hDevInfo,
&did,
&DEVPKEY_Device_RemovalPolicy, // Ask for the "removal policy"
&devPropType,
(BYTE*)buffer,
sizeof(buffer),
&dwSize,
0);
if (!getPropResult)
{
std::cerr << "Unable to to get removal policy for disk device: " << ::GetLastError() << std::endl;
continue;
}
/* This bit *would* skip removable disks, you wanted...
else if (buffer[0] != 1)
{
std::cerr << "Skipping removable disk device " << devInstance << std::endl;
continue;
}
*/
// OK this is a fixed disk so it might be the one we'll compare against
// 1. Get the very first disk interface from this particular disk device
// 2. Open a file on it
// 3. Query the resulting file for its device number.
// 4. Compare the device number to the one we determined above
// 5. If it matches ours, then we succeed. If not, continue
SP_DEVICE_INTERFACE_DATA devIntData;
devIntData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
// Get the disk interfaces
const auto result = SetupDiEnumDeviceInterfaces(
hDevInfo,
&did, //&did,
&GUID_DEVINTERFACE_DISK, // Get Disk Device Interface (from winioctl.h)
0, // We only need the very FIRST one. I think...
&devIntData);
if (!result)
continue;
DWORD dwRequiredSize = 0;
// Want to get the detail but don't yet know how much space we'll need
// Do a dummy call to find out
SetupDiGetDeviceInterfaceDetail(
hDevInfo,
&devIntData,
nullptr,
0,
&dwRequiredSize,
nullptr);
if (ERROR_INSUFFICIENT_BUFFER != ::GetLastError())
{
std::cerr << "Unable to get device interface Detail: " << ::GetLastError() << std::endl;;
}
else
{
// Get the detail data so we can get the device path and open a file.
std::vector<TCHAR> buf(dwRequiredSize);
auto pDidd = reinterpret_cast<PSP_DEVICE_INTERFACE_DETAIL_DATA>(buf.data());
// WARNING: HARD CODED HACK
// ------------------------
// https://stackoverflow.com/questions/10405193/vb-net-hid-setupdigetdeviceinterfacedetail-getlasterror-shows-1784-error-inv
//
// Don't ask. Just do what they tell you.
// -----------------------------------------------------------------
#ifdef BUILD_64
pDidd->cbSize = 8;
#else
pDidd->cbSize = 6;
#endif
// -----------------------------------------------------------------
if (!SetupDiGetDeviceInterfaceDetail(
hDevInfo,
&devIntData,
pDidd,
dwRequiredSize,
&dwRequiredSize,
nullptr))
{
std::cerr << "Cannot get interface detail: " << ::GetLastError());
}
else
{
// FINALLY: We now have a DevicePath that we can use to open up
// in a Win32 CreateFile() call. That will let us get the
// STORAGE_DEVICE_NUMBER and compare it to the one we were given.
const auto hFile = ::CreateFileW(pDidd->DevicePath, 0, FILE_SHARE_READ, nullptr, OPEN_EXISTING, 0, NULL);
if (INVALID_HANDLE_VALUE != hFile)
{
std::cerr << "Unable to open logical volume: " + devicePath << std::endl;
continue;
}
STORAGE_DEVICE_NUMBER sdnTest;
ZeroMemory(&sdnTest, sizeof(STORAGE_DEVICE_NUMBER));
if (0 == DeviceIoControl(
hDevInfo
IOCTL_STORAGE_GET_DEVICE_NUMBER,
nullptr, // output only so not needed
0, // output only so not needed
&sdnTest,
sizeof(STORAGE_DEVICE_NUMBER),
nullptr,
nullptr))
{
std::cerr << "Unable to determine storage device number: " << ::GetLastError() << std::endl;);
}
else
{
// All this for a one-line test...
foundValidMatch = sdnTest.DeviceNumber == sdn.DeviceNumber;
}
}
}
}
SetupDiDestroyDeviceInfoList(hDevInfo);
return foundValidMatch;
}
I hope this saves someone a headache