turner | SOCKS5 and HTTP over TURN/STUN proxy | Proxy library
kandi X-RAY | turner Summary
kandi X-RAY | turner Summary
A proof of concept for tunnelling HTTP over a permissive/open TURN server. This will connect to the server, setting up any TCP channels required. A local HTTP proxy is created on 8080, which can be used to "tunnel" the traffic to a target host, for example 169.254.169.254, which the TURN server has access to but you might not have direct access to.
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Top functions reviewed by kandi - BETA
- connectTurn connects to a TURN server
- handleHTTP connects to a Tor socket
- This is the main entry point .
- handleProxyTun connects to the Tor server
- bufHeader converts http . Header to a byte slice .
- Close the connection
- copyHeader copies the header header .
- turnDial connects to the given address .
- Transfer from source to destination
turner Key Features
turner Examples and Code Snippets
Community Discussions
Trending Discussions on turner
QUESTION
My understanding of what a transmit/receive buffer is largely related to ethernet systems, where some data is stored in the buffer before the whole data is transmitted. Is this the same with UART, where some data is stored in a UART transmit/receive buffer until there are 8 bits (thus filling up the UART capacity) or when the system is ordered to send the data from the buffer?
The reason I am asking this is because I am looking at some C code for the MSP430FR5994 MCU involving UART and I'd like to fully understand the code. Please let me know if more info is needed to answer my question.
The code in question, if anyone's interested. The code runs fine, I just want to know what the buffer does in UART.
...ANSWER
Answered 2022-Apr-08 at 13:53There are software buffers and hardware buffers.
The UART hardware peripheral has hardware buffers, a rx buffer where received data is waiting to get handled by the program, and a tx buffer where data is waiting for the MCU to transmit it (a tx complete flag will get set). In some MCUs these are just 1 byte large each. Others have a larger rx buffers following a FIFO principle.
UCA0TXBUF in your example appears to be this tx buffer/data register and apparently it is just 1 byte large. USCI_UART_UCTXIFG appears to be the flag set upon transmission complete and it's set to generate an interrupt when done.
The RXbuffer in your example is a software buffer used by the UART driver.
Unrelated to your question, this code has several problems and latent bugs waiting to explode:
Using
charfor raw data is always incorrect, sincecharhas implementation-defined signedness and might turn into negative number if you store raw data in the MSB. It is not a portable type and shouldn't be used for anything but text strings. Useunsigned charoruint8_tinstead.There is no protection from race conditions in your code, so in case the main program is accessing
RXbufferwhile the ISR is writing to it, you will get all manner of weird bugs.There is no protection against incorrect compiler optimizations. In case your compiler doesn't realize that an ISR is never called by software but by hardware, the optimizer might break the code. To prevent this all shared variables should be declared
volatile(same goes in case you would use DMA buffers instead).Check out:
Microcontroller systems do not return from main() so
int main (void)is always wrong. You should use the implementation-defined formvoid main (void)(use-ffreestandingif compiling with gcc) and end themain()function with afor(;;) {}loop.You probably want to handle UART framing errors = data corruption or wrong baudrate, as well as UART overrun errors = hardware buffers were overwritten before MCU emptied them. These are typically available through interrupt flags too.
QUESTION
I was watching Jason Turner C++ weekly and I came across this code snippet.
...ANSWER
Answered 2022-Mar-27 at 19:06Visitor(const B&... b)
QUESTION
In his talk Jason Turner proposed to break the C++ ABI to keep the language moving forward. He also mentioned that if needed due to compatibility reasons, C++ ABI changes can be isolated by wrapping a C++ library into a C library.
A relevant screenshot at 27:30:
Here "BinaryLibrary" and "Old C++ stdlib" use an old ABI, and "NewExecutable" uses a hypothetical updated ABI.
As far as I understand, this works since old C++ ABI of "BinaryLibrary" gets baked into a separate binary with a more stable interface.
But what makes C a good alternative? Can't its ABI change as well?
...ANSWER
Answered 2022-Mar-19 at 06:37Can the C ABI change? Well, not easily. There have been occasional changes on some platforms, but so many systems and languages are built using the C ABI as a public interface that it has to be quite stable. Many languages have a C FFI which allows them to call C functions, and changing the C ABI would break those. And the C ABI is a common way of interacting with the operating system, e.g. to open files or send messages, so it's used by many language implementations (e.g. interpreters and standard libraries).
Note that the C ABI is not part of the C standard. Each platform or system can define its own C ABI. So while it tends to be stable over time on a given platform, it is not consistent across all platforms.
QUESTION
I have two tables emp and dept I need to find the names of departments where employees earn the most and the least on average and display the result in one line with the difference.
here is my solution
this works but I was wondering if there was a cleaner way of writing this query ? any help is appreciated
Here are the tables:
...ANSWER
Answered 2022-Mar-16 at 08:49Here's one option, which uses
rankanalytic function (to "sort" average salaries in ascending (least) or descending (most) order),caseexpression (to find departments that earns the most or the least) and- some joins
QUESTION
I am looking to scrape the following web page:
https://kubears.com/sports/football/stats/2021/assumption/boxscore/11837
... specifically, the "Play-by-Play" tab in the top menu. Getting the information was pretty simple to do:
...ANSWER
Answered 2022-Mar-16 at 14:17Here's a way to achieve your result using functions from the tidyverse. There are a lot of different ways to get the same results, this is just one way. The code is structured in three main parts: first, building a big dataframe by binding the rows of the multiple lists, second removing the useless rows that were in the original dataframe, and third create all the variables.
The tab dataframe is also slightly different from your page original input, see the code in the data and functions part. I basically changed the column names so that they are not the same and rename them col1 and col2.
Only a few different functions are actually used. I created extract_digit, which extracts the nth occurrence of a number from a string. str_extract and str_match extract the specified pattern from a string, while str_detects only detects (and returns a logical, TRUE or FALSE). word gets the nth word from a string.
QUESTION
I am using A-Frame and pdf.js to create an application to view PDF files in VR. The application works as expected on desktop, including advancing to the next page of the PDF document and re-rendering to a canvas.
When running in a browser in VR (tested with Quest 2), the first attempt renders as expected. However, when rendering a second document page to the canvas, the new image fails to appear unless exiting VR mode, at which point the new texture appears as expected.
I have tried setting the associated material map.needsUpdate repeatedly (in an A-Frame component tick loop) to no effect. While experimenting, I also noticed that if you try to render a new PDF page a second time and then another page a third time (advancing by two pages while in VR mode), when exiting VR mode, only the texture from the second time appears; the data from the third render appears to be lost - I wonder if this is related to the primary issue.
Code for a minimal example is below, and a live version is available at http://stemkoski.net/test/quest-pdf-min.html . When viewing the example in desktop mode, you can advance to the next page by opening the browser JavaScript console and entering testBook.nextPage(); and see that the image changes as expected. You can test in VR mode with a Quest headset; pressing the A button should advance to the next page.
The question is: how can I render pages of a PDF document to the same canvas, multiple times, while in VR mode in A-Frame?
...ANSWER
Answered 2022-Mar-05 at 14:51Found an answer here:
requestAnimationFrame doesn't fire when WebXR is engaged
Its quite relevant because pdf.js uses requestAnimationFrame by default when rendering the image onto the canvas.
It can be toggled though - the pages render function has an option intent, which is later on used to determine whether to use requestAnimationFrame.
The sources You use are slightly different (older?), but if you search for creating the InternalRenderTask in the render function of the ProxyPDFPage - it's all there:
QUESTION
The data should come from table Emp and from the other tables Dept and Salgrade. Assume that the user's identifier is available through the constant user (see the result of the query: SELECT User FROM Dual;) is the same as the value Ename. I want to create a row in table Emp with own identifier as Ename.
DB:
EMP
...ANSWER
Answered 2022-Feb-14 at 18:44Those tables are owned by user SCOTT so - connect as it; Scott will create a view and grant other users select privileges on a public synonym.
QUESTION
I'm trying to do this query but it doesn't work for me.
Show all results for employees earning less than ALLEN
This is the employees table:
...ANSWER
Answered 2022-Feb-13 at 16:07A subquery should do the job:
QUESTION
I would like to access the value of the "current row" on which I write the analytic expression on. For example, given the following sample data:
...ANSWER
Answered 2022-Jan-27 at 09:56Use a RANGE window in the analytic function:
QUESTION
I want to be able to count the number of NA's that appear in a row in specified columns. From my data below, I'd like to be able to count the NA's rowwise that appear in first, last, address, phone, and state columns (exlcuding m_initial and customer in the count).
...ANSWER
Answered 2022-Jan-04 at 21:45df$na_count <- rowSums(is.na(df[c('first', 'last', 'address', 'phone', 'state')]))
df
first m_initial last address phone state customer na_count
1 Bob L Turner 123 Turner Lane 410-3141 Iowa 0
2 Will P Williams 456 Williams Rd 491-2359 Y 1
3 Amanda C Jones 789 Haggerty Y 2
4 Lisa Evans N 3
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