I want to develop one driver so i have create one service and one .sys file for driver to be display now i do not know how to attach that two file or how to register my driver to windows.
so just tell me the step which i should follow.
Thanks and hoping for positive response.
You can load driver by using StartService API. And you can also use ZwLoadDriver. It's a native API. You can find more information about them in MSDN.
Depends on the driver you write. If it's a device driver it's automatically loaded once the system needs it for the previously defined device classes.
For drivers which don't need devices you need a special driver service. See this CodeProject example - section "Dynamically Loading and Unloading the Driver"
Basically the most straightforward is using the following apis (in that order). I think it should be pretty straight forward.
http://msdn.microsoft.com/en-us/library/ms684323%28v=VS.85%29.aspx
http://msdn.microsoft.com/en-us/library/ms682450%28v=VS.85%29.aspx
http://msdn.microsoft.com/en-us/library/ms686321%28v=VS.85%29.aspx
http://msdn.microsoft.com/en-us/library/ms682028%28v=VS.85%29.aspx
Related
I'm working with embedded linux.
There are two USB gadget drivers built as LKM, g_ether.ko and g_file_storage.ko.
I did depmod and then in modprobe -l both drivers show up in the list.
kernel/drivers/usb/gadget/g_ether.ko
kernel/drivers/usb/gadget/g_file_storage.ko
The problem is, the kernel doesn't load either of them on boot anatomically.
Curently my solution is to add boot scripts to /etc/init.d etc/rcX.d to force g_ether.ko to be loaded on boot as the default driver.
Are there other (better) ways to make g_ether.ko default driver?
A possible solution is, I make g_ether.ko a static driver, and make g_file_storage.ko an LKM, but I don't know how to turn off a static driver to release the hardware so that another LKM driver can be loaded.
Any suggestions?
It's a user choice to use USB peripheral controller as ethernet or storage. So there is no related hardware event for automatic client driver loading.
But there is a way to bind/unbind driver in user space through sysfs. Look at this： https://lwn.net/Articles/143397/
I am new in Linux and i want to know the internals of drivers and how it is interacting with hardware, so my question is that How the application is interacting with hardware means when the core part will come in picture and what it will do?
When the controller of that driver will come and how it will handle the request generated by the application.
And what is Firmware and when it comes into picture in Linux?
For eg: if i am using usb device like
$ cat /dev/usb0.1
then which is the core of usb(usb_storage.c) and
which is the controller(usb_hub.c)
and how they are related to each other.
Thanks in advance..
Basically linux kernel driver provide interface such as device file node then application can use standard read()/write()/ioctl() to pass parameter to operate hardware. Provide interface in /proc or /sys can be facilities to do that too. Detail implementation how to handle request depends on respective hardware spec.
The problem background - there are two different windows applications that are trying to access webcam on the computer at the same time. Currently, only one application is able to access to it. I want to be able to allow both applications to simultaneously access the webcam. A common example of my problem is, skype and yahoo messenger trying to access the webcam on the computer at the same time.
I found a few softwares (manycam.com, http://www.splitcamera.com/) that allow this on windows. But I am not sure how they implemented it. I want to write the code myself to achieve this since my code needs to be integrated with other APIs.
I appreciate if anyone can shed light on how to write a device wrapper to achieve this.
The kernel camera driver registers several OS-defined callbacks. One of the callbacks is used for the output stream. Dedicated Windows applications have an interface to this stream - you'll need to do some reading on this subject, it's not something that can be covered in scope of SO. You need a component that will be layered in between the client applications and the camera driver. This component should intercept your camera driver output and duplicate it for the registered clients. This can be achieved either in kernel (filter driver) or in user mode (preferable). http://msdn.microsoft.com/en-us/library/windows/hardware/ff557573%28v=vs.85%29.aspx is a good place to start.
Note: this functionality might be already supported by your camera software (though I think the chances are very slim) and in this case you should dig into the corresponding documentation.
I'm developing an app for filtering network connections from clients to my server (deny or allow to connect to my server).
I'm researching and found some resources like Windows Firewall API.
But I don't know if it's necessary for me or not.
What's the best API or solution to resolve it?
Thank so much.
regards,
Why don't you use an already-developed and proven app in the first place? If you really want to develop a filtering layer then what you need is a Filter driver and more specifically NDIS filter . A sample solution can be found here. But unless you are absolutely sure what you are doing and what you want to achieve I'd strongly suggest that you stick to an off-the-shelf solution - any firewall will be decent, or even a linux machine in front of your server with appropriate iptables rules.
Since you are working in a windows operating system. You would have to make use of Windows Filtering Platform as seen in the documentation on https://msdn.microsoft.com/en-us/library/aa366510.aspx
Drivers like TDS,LSP, and NDIS are all deprecated.
The programming language is C++. In my experience, it was a desktop application with the GUI in WxWidget and writing the filtering network connections hooks into the user mode.
There are two Filtering Layer Identifiers (Run-time Filtering Layer Identifiers and Management Filtering Layer Identifiers ), i made used of the earlier being that its more effective.
Should you need more assistance let me know.
We're porting our USB device dll's to use the generic WinUsb.
However, WinUsb doesn't support multiple concurrent application accss to the same device (Same VID & PID).
I wanted to know if there is a way to implement this concurrent access using WinUsb?
I read about filter drivers & services.
1. I don't want to use a filter driver because, as I understand, this will have to pass WHQL, and I rather not go this path.
2. Regarding a windows service: How exactly should I implement it? should the service get all of the calls to WinUsb, and if a different application tries to access the same device, it will close the connection to the first application, open a new connection, and back again?
Is the service the right correct solution in this case? Is there another way to implement the solution other that what I wrote?
Thanks.
A filter driver does not need to pass WHQL. You only need to sign the catalog file, needed by the driver package. This only needs a code signing certigficate from verising/... . This should be a good starting place to get to know this.
Nevertheless, a kernel driver can be hard to develop. So maybe a COM server would be a better approach. You implement this sharing from a service, by allowing COM-clients to create objects from your service and then implement some kind of sharing/mutual exclusion in your COM-server.
A COM-exe servers can be written relativly fast.