tlv | extremely lightweight svg header | Animation library
kandi X-RAY | tlv Summary
kandi X-RAY | tlv Summary
tlv aims to create a lightweight svg header only library, that makes creating svg's fast and easy. Currently tlv doesn't protect you from shooting yourself in your foot, as in the end it just a nice wrapper to write text to a svg file. tlv is and always will be a work in progress, pull requests, input, suggestions are very welcome. Enjoy!. Feel free to reuse and contribute, pull requests are very welcome! This code is (and forever will be) a work in progress.
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QUESTION
I want to establish a tls connection between my sim card and a server in TLS-PSK mode. to achive this, as far as I understood, First I have to send a push command to open a BIP channel, then establish a CAT_TP link by sending another push command and then sim card will start the TLS handshake. So first I want to send a push command to my sim card to open a BIP channel. To do this, the push command will be OPEN CHANNEL command. But first I'm testing this process by sending the OPEN CHANNEL command to sim card via sim card reader to see how it works. I have a sample file which I'm following that first sends an envelope SMS-PP with the following content:
...ANSWER
Answered 2021-May-14 at 15:39You should first send the TERMINAL PROFILE command. With this command, you'll let the UICC know what the terminal is capable of. In this command, you should indicate that the terminal is capable of handling PROACTIVE commands. You can read more about this in ETSI TS 102223
QUESTION
I created the following error in my library:
...ANSWER
Answered 2021-May-05 at 22:23Dereference the Box
before doing the assert_eq
:
QUESTION
I have created code with iText 7 that is able to digitally sign a given PDF with a X509 certificate that uses an ECDSA key pair. When I open this signed PDF in Acrobat Reader DC, it correctly reads it, and verifies it to be valid (meaing doc is unmodified since signing, etc etc).
However, when I try to validate this same document with iText 7, the integrity and authenticity check returns false.
Here is a sample code:
...ANSWER
Answered 2021-Apr-25 at 16:00There is an issue in your ECDSA signatures which is only ignored by Adobe Acrobat but not by iText 7.
There are two major formats to encode an ECDSA signature value:
as a TLV
SEQUENCE
of twoINTEGER
values
QUESTION
I am currently working on an I2C communication between an i.MX6 (Android BSP) and a NTAG 5 boost component.
NTA5532 datasheet says : "According to NFC Forum Type 5 Tag Specification, EEPROM block 0 contains the Capability Container directly followed by the NDEF Message TLV."
In fact, below is the user memory orgnisation of the NTAG 5 boost:
So I used TagInfo NXP's app to read the memory of the NTAG 5 component.
Here is what I get concerning NDEF Capability Container using this app:
How can I decode this block as NXP does in its application?
...ANSWER
Answered 2021-Mar-18 at 08:18Following what says this PDF from ST about NDEF management, "The CC manages the information of an NFC Forum T5T", so the structure of this Capability Container is mainly common to all NFC Forum tags.
For more information about how to interpret the CC, see the previous pdf.
QUESTION
I need to add values into my Array saved as Json file with the following structure:
...ANSWER
Answered 2021-Feb-24 at 23:35You can't append JSONs. You need to read the file, decode the JSON into an array, add the new element to the array, and write it back out.
Also, you shouldn't assign to individual array elements at the same time as you're pushing to the same array.
QUESTION
Given the following structure of the list:
...ANSWER
Answered 2021-Jan-19 at 15:10Found a solution, this does the trick:
QUESTION
I read a number of articles and S/O answers saying that (on linux x86_64) FS (or GS in some variants) references a thread-specific page table entry, which then gives an array of pointers to the actual data that is in sharable data. When threads are swapped, all the registers are switched over, and the threaded base page therefore changes. Threaded variables are accessed by name with just 1 extra pointer hop, and the referenced values can be shared to other threads. All good and plausible.
Indeed, if you look at the code for __errno_location(void)
, the function behind errno
, you find something like (this is from musl, but gnu is not so much different):
ANSWER
Answered 2020-Dec-16 at 18:02In 64-bit mode, the actual contents of the 16-bit FS and GS segment registers are essentially irrelevant. Instead, there are separate 64-bit "FSBASE" and "GSBASE" registers within the CPU, and when you specify, say, an FS segment override to an instruction, the base address from the FSBASE register is added to the operand's effective address to determine the actual linear address to be accessed.
The kernel's context structure for each thread stores a copy of its FSBASE and GSBASE registers, and they are reloaded appropriately on each context switch.
So what actually happens is that each thread sets its FSBASE register to point to its own thread-local storage. (Depending on the CPU features and OS design, this may only be possible for privileged code, so a system call may be required.) Then instructions with an FS segment override can be used to access an object with a given offset in the thread-local storage block, as you've seen.
In 32-bit mode, on the other hand, the values in FS and GS do have meaning; they are segment selectors which are used to index into a descriptor table maintained by the kernel. The descriptor table holds the actual segment info, including its base address, and you could use a system call to ask the kernel to modify it. Each thread would have its own local descriptor table, so you wouldn't necessarily see different selectors in FS for different threads, but it would still be the case that FS-override instructions from different threads would result in accesses to different linear addresses.
QUESTION
I am currently getting myself into the LwM2M topic and I tried the leshan project from eclipse. I followed the README.md on https://github.com/eclipse/leshan. The standalone demos are working fine, but when I try to build the project with "mvn clean install" I get the following log/error:
...ANSWER
Answered 2020-Nov-12 at 14:46I continued researching on my own and Java 15 is the problem. If anyone has the same problem as i had just switch to Java 11 and run the build as described. It worked fine for me. If you have any other problems I suggest that you also post your questions, concerning leshan lwm2m, on https://github.com/eclipse/leshan/issues.
Jonas
EDIT: You can also do it with Java 15. You have to change the pom.xml document. Change in line 456 the version from 4.0.0 to 5.1.1 .
QUESTION
I am trying to search for 3 letter target words and replace them with corrected 3 letter words.
e.g. CHI - SHA as a single cell entry (with hyphen) to be replaced with "ORD -" etc.
There will be instances where the target word is part of a word pair within a cell, e.g. CHI - SHA.
The code below works to capture all of the cases but I realized that when the the cell is e.g. XIANCHI - SHA it would also correct the part "CHI -" resulting in XIANORD - SHA.
How can I limit the fndlist to skip the target letters if they are part of a longer word?
Sample
- CHI - (single cell entry) converts to ORD -
- CHI - PVG (one cell) converts to ORD - PVG
- XIANCHI - PVG converts to XIANORD - PVG (error)
If I use lookat:xlwhole the code would only catch the CHI - case but not the pair but if I use xlpart it will catch the pair CHI - PVG but also corrects any word it finds with that element.
thanks for any help
...ANSWER
Answered 2020-Nov-06 at 20:29Edit: I wanted to give you something a bit more complete. In the below code, I used a separate function that creates a map between before and after values. This cleans up the code because now all of these values are stored in one place (also easier to maintain). I use this object to then create the search pattern, since a regular expression can search for multiple patterns at once. Finally, I use the dictionary to return the replacement value. Try this revised code, and see if it better meets your use case.
I ran quick performance test to see if it performed better/worse than built-in VBA replace function. In my test, I used only three of the possibilities in my regular expression search/replace, and I ran a test against 103k rows. It performed equally as well as a built-in search and replace using only one value. The search and replace would have had to be re-run for each of the search values.
Let me know if this helps.
QUESTION
I am working with SCAPY for dissecting network packets. Some of them have a lot of random padding between strings.
Is there a way to tell SCAPY to just "skip the next 4 bytes after this field"?
Currently I am using a StrFixedLen
field for every one of them and it just blows up the output and is very space consuming, and distracting...
I can't use the padded fields because I need to provide a padding byte, but in my case the padding consists of random bytes..
Thanks for any advice!
EDIT: here an example of a packet
...ANSWER
Answered 2020-Sep-28 at 08:52Based on this GitHub fork, in which the author added a functionality that is somewhat similar to what I was searching for, I found a solution.
I added a class to fields.py
that just inherits from the field class that I want to hide, which in my case it StrFixedLenField
:
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