In python construct library (for parsing binary data), how to group the rest of data as one field? -

-

I am using the Python Construction Library to parse the Bluetooth protocol. The link of the library is

As the protocols are really complex, I've divided the parsing in several steps, instead of building a gyzy construction. I have already parsed large raw data in this structure: 

  container ({'CRC': 'DCACT', 'CRC_OK': 1, 'Channel': 38, 'RSS': 43, 'access_addr': 2391391958 L, 'Header': Container ({'TxAd': wrong, 'PDU_langue': 34, 'PDU type': 'ADV_ind', 'RxAd': incorrect)), 'Payload': '2 \ x15 \ x00a \ x02 \ x00 \ x02 \ x01 \ x06 \ x07 \ x03 \ x03 \ x18 \ x02 \ x18 \ x04 \ x18 \ x03 \ x19 \ x00 \ x02 \ x02 \ n \ xFE \ T \ tAS-D1532 '})   
 As you can see that the length of the payload is in the form of PDU_length Shai's went to a 34. The payload has the following structure:  octet: adress] [0-31] The rest of the octets: Advertisement]  
 However, when I started parsing the payload as a standalone structure , Then I lost the length of 34 in terms of its construction. How do I create a payload that will first explain 6 octets as an ad address and say the remaining data data as advert data?  
 My current solution looks like this:  
  length = lane (payload) # I did not use PDU_length but Lennon (payload) also gives me 34 back. ADVERT_PAYLOAD = structure ("ADVERT_PAYLOAD", field ("ad entry", 6), field ("addata", length-6), print) ADVERT_PAYLOAD.parse (payload)   
 This is the correct output but apparently all payload sizes are of 34. For this method, I need to create this  ADVERT_PAYLOAD  eveytime I need to parse a new payload.  
 I have read the documentation several times, there is no way to pass the knowledge of payload length in the context of some related search  ADVERT_PAYLOAD , and neither does it  pars Is able to get the length of the passage passed in the  method.  
 Perhaps there is no solution to this problem. But then, how do most people parse such protocol data? As you go ahead in the payload, it is divided into more types and you need to build more small to parse them. Should I build an original production, embedding small constructions, which also embed small productions?  
 Thanks in advance.   
 
 
  greedy range  will get a list of four, and  JoinEditor  will be included in all the letters at one time:  
  class JoinAdapter (adapter): Def _decode (auto, obj, context): return "". Adapter (gridirenge (field ("addata", 1)))) payload = '2 \ x15 \ x00a \ x02 \ x00 (Obj) ADVERT_PAYLOAD = structure ("ADVERT_PAYLOAD", field ("ad entry", 6) \ X02 \ x01 \ x06 \ x07 \ x03 \ x03 \ x18 \ x02 \ x18 \ x04 \ x18 \ x03 \ x19 \ x00 \ x02 \ x02 \ n \ xfe   
 Output: < / P> 
  Container: Adress = '2 \ x15 \ x00a \ x02 \' X00 'AdvertData =' \ x02 \ x01 \ x06 \ x18 \ x02 \ x18 \ x04 \ x18 \ x03 \ X19 \ x00 \ x02 \ x02 \ n \ xfe \ t \ tAS-D1532 \ '

Comments

Post a Comment

Popular posts from this blog

excel vba - How to delete Solver(SOLVER.XLAM) code -

-
After opening several examples of macro / code written, I suddenly get stuck with a code that seems safe. Solver (SOLVER.XLAM) is doing this notation and I would like to remove it from my system. I do not think this is a relativant code. Can anyone tell me what should I do? I have already installed something to remove the password but Solver is still asking for password and I can not get rid of it! itemprop = "text"> Solver Excel is add-in If you want to delete it, then Excel Application & gt; Options & gt; Add-ins & gt; Search for 'Go to' button and gt; Uncheck the solver on the list like press something (I can not give you the exact path because I have the Polish version of Excel). Trying to open Solver's VBA code is not good because it There is allegedly copyright. Besides, I do not think Solver creates any disadvantages while working with Excel or VBA.
Read more

github - Teamcity & Git - PR merge builds - anyway to get HEAD commit hash? -

-
I have a team city build project with Gitbab VCS route, I have been triggered for both / head on PR and / Merge the referee. The annoying thing is that you can not do anything useful with the merged hash - it is not present in Gitobb. I want to exclude newsgate packages with head in gutub comet situations in the version number along with Hewash (Newsaging 7) for the music build, but against head hash. However, I can not see a way to get the head hashes while constructing that merge. I just want to head because it's useless - we only care about merge. (PR - Pull Request) This command works reliably while running One on / merge is git log --no-merge -1 ---- = '% h'
Read more

ios - Replace text in UITextView run slowly -

-
I have a UITextView and I change a word like the code at the end of UITextView.text: - (void) Replace TexttechWitWord: (NSString *) word {NSString * currentTextViewText = self.textView.text; CurrentTextViewText = [currentTextViewText stringByReplacingCharactersInRange: NSMakeRange ([self.textView.text length] - [word length], [word length]) withString: word; Self.textView.text = currentTextViewText; } Replacement work is fine, but it runs very slowly and very slowly when the textView now lengthens Is there any better way? I try the replacement range: with text for a week but still stuck. Not to know how to use it to replace it in your case. Please guide! Thanks in advance! This is an important job. As you are using an irreversible string and you are creating a very long string and before Assigned to NSString created from. NSString will be used instead of NSMutableString . - (UITableViewCell *) TableView: (UITableView *) Table View CellForOutPath: (NSIndex...
Read more