lwf | LWF - Lightweight SWF

by gree C++ Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(5)Vulnerabilities Install Support

kandi X-RAY | lwf Summary

lwf is a C++ library. lwf has no bugs, it has no vulnerabilities and it has low support. However lwf has a Non-SPDX License. You can download it from GitHub.

LWF - Lightweight SWF

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Quality

Security

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Support

lwf has a low active ecosystem.

It has 622 star(s) with 171 fork(s). There are 111 watchers for this library.

It had no major release in the last 6 months.

There are 16 open issues and 110 have been closed. On average issues are closed in 54 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of lwf is current.

Quality

lwf has 0 bugs and 0 code smells.

Security

lwf has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

lwf code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

lwf has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

lwf releases are not available. You will need to build from source code and install.

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lwf Key Features

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lwf Examples and Code Snippets

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Community Discussions

Trending Discussions on lwf

Transaction fails when I call the play() function from ethers.js

IRQL_UNEXPECTED_VALUE BSOD after NdisFIndicateReceiveNetBufferLists?

NDIS LWF driver causing issues for WFP drivers in the network stack?

Replacing column values in pyspark by iterating through list

Using unique locks while in DPC

QUESTION

Transaction fails when I call the play() function from ethers.js

Asked 2022-Mar-30 at 08:51

I am using ethers.js to interact with my smart contract deployed on polygon testnet. I try to call a function play() from the smart contract but it always fails with the error: Error: transaction failed [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ]

I have satisfied all the require statements but it still seems to fail. Is there something wrong with my code?

I have also tried using getRandomNumber() function from of chainlink VRF separately and it works there.

My smart contract:

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ANSWER

Answered 2022-Mar-30 at 08:51

Your transaction was reverted due to insufficient gas:

Warning! Error encountered during contract execution [out of gas]

Try removing gas and gasPrice fields from your call or increasing

Source https://stackoverflow.com/questions/71673983

QUESTION

IRQL_UNEXPECTED_VALUE BSOD after NdisFIndicateReceiveNetBufferLists?

Asked 2022-Feb-20 at 20:13

We have an NDIS LWF driver, and only on very few systems, we get IRQL_UNEXPECTED_VALUE BSOD on the NdisFIndicateReceiveNetBufferLists, But we do not raise or lower IRQL in any part of the code, and the NdisFIndicateReceiveNetBufferLists is called in the irp_mj_device_control callback. We also check the IRQL and if its DISPATCH, we set the last argument to NDIS_RECEIVE_FLAGS_DISPATCH_LEVEL, and 0 otherwise, could this be the issue?

I also found this article:

https://knowledge.broadcom.com/external/article/164146/crash-with-bug-check-0xc8-after-installi.html

They had a similar issue, and the issue seems to be that there was another NDIS driver raising the IRQL to DISPATCH_LEVEL and forgeting to lower it? But I'm still not sure if this is applicable to our issue or not? Could this be also our issue?

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ANSWER

Answered 2022-Feb-20 at 20:13

They had a similar issue, and the issue seems to be that there was another NDIS driver raising the IRQL to DISPATCH_LEVEL and forgeting to lower it? But I'm still not sure if this is applicable to our issue or not? Could this be also our issue?

That particular bugcheck means that someone leaked the IRQL during the code that has already unwound off the stack. KeExpandKernelStackAndCalloutInternal is doing something like this:

Source https://stackoverflow.com/questions/71194617

QUESTION

NDIS LWF driver causing issues for WFP drivers in the network stack?

Asked 2021-Oct-15 at 08:54

I have written a NDIS LWF driver, that gathers send/recv packets, and sends them to the user service, and the user service marks those that are OK, and then we indicate/send those packets that were marked as OK. Note that we first use NdisFSendNetBufferListComplete (in case of send) and NdisFIndicateREceiveNetBufferLists (in case of receive) in our LWF callbacks, and then we send the packets to the user afterwards, and we finally send/indicate those that are marked as OK.

But i have noticed that this is causing the windows 10's task manager to show 0% in every process for their network usage in the processes tab, even tho they are not 0%. And when i turn off the driver it get fixed.

But the weird thing is that his doesn't happen in the performance->ethernet tab and in the resource monitor program, and both of them show the actual network usage.

So what is causing this, and why can the resource monitor and the network tab still see the network usage? I think this has to do with the fact that probably resource monitor uses an NDIS filter and the network usage in the processes tab is using a WFP, but I'm not sure.

...

ANSWER

Answered 2021-Oct-14 at 19:49

Does your driver call NdisCopySendNetBufferListInfo and NdisCopyRecieveNetBufferListInfo?

The per-app accounting is indeed tracked using WFP callouts. There is a WFP callout at the top of the network stack that attaches app identity to each NET_BUFFER_LIST. There is another WFP callout at the bottom of the network stack (closest to the hardware) that does the actual byte-counting and bills each app for its network consumption.

If you simply clone the NET_BUFFER_LIST, that doesn't by default copy the app identity that is attached to the NET_BUFFER_LIST. You need to also call one of NdisCopySendNetBufferListInfo or NdisCopyRecieveNetBufferListInfo to copy that metadata.

Coincidentally there was another NDIS question yesterday for which I am writing the same answer ;) . So rather than write it all out again, you can refer to what I wrote here: Send doesn't work properly in my NDIS modifying filter driver

Source https://stackoverflow.com/questions/69554075

QUESTION

Replacing column values in pyspark by iterating through list

Asked 2021-Feb-23 at 07:54

I have a pyspark data frame as

...

ANSWER

Answered 2021-Feb-22 at 08:05

You can use replace on dataframe to replace the values in colC by passing a dict object for the mappings. And round function to limit the number of decimals in colB:

Source https://stackoverflow.com/questions/66311283

QUESTION

Using unique locks while in DPC

Asked 2020-Jan-04 at 22:17

Currently working on a light weight filter in the NDIS stack. I'm trying to inject a packet which set in a global variable as an NBL. During receive NBL, if an injected NBL is pending, than a lock is taken by the thread before picking the injected NBL up to process it. Originally I was looking at using a spin lock or FAST_MUTEX. But according to the documentation for FAST_MUTEX, any other threads attempting to take the lock will wait for the lock to release before continuing.

The problem is, that receive NBL is running in DPC mode. This would cause a DPC running thread to pause and wait for the lock to release. Additionally, I'd like to be able to assert ownership of a thread's ownership over a lock.

My question is, does windows kernel support unique mutex locks in the kernel, can these locks be taken in DPC mode and how expensive is assertion of ownership in the lock. I'm fairly new to C++ so forgive any syntax errors.

I attempted to define a mutex in the LWF object

...

ANSWER

Answered 2020-Jan-03 at 20:47

You can't use standard ISO C++ synchronization mechanisms while inside a Windows kernel.

A Windows kernel is a whole other world in itself, and requires you to live by its rules (which are vast - see for example these two 700-page books: 1, 2).

Processing inside a Windows kernel is largely asynchronous and event-based; you handle events and schedule deferred calls or use other synchronization techniques for work that needs to be done later.

Having said that, it is possible to have a mutex in the traditional sense inside a Windows driver. It's called a Fast Mutex and requires raising IRQL to APC_LEVEL. Then you can use calls like ExAcquireFastMutex, ExTryToAcquireFastMutex and ExReleaseFastMutex to lock/try-lock/release it.

Source https://stackoverflow.com/questions/59584649

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

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Install lwf

You can download it from GitHub.

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