I am using pyshark to open and parse pcap files. Currently I've been able to access the packet fields. But I cannot seem to find a way to access the hexdump value of each packet. Is there any way to do that?
According to the homepage of PyShark:
[PyShark] doesn't actually parse any packets, it simply uses tshark's (wireshark command-line utility) ability to export XMLs to use its parsing.
The XML exported by tshark is either PSML (Packet Summary Markup Language) or PDML (Packet Details Markup Language) and neither of these format store the full hexadecimal dump of packets.
After digging into the source code and considering the point above, I can say that the feature you are looking for is not implemented in PyShark.
Related
I am trying to extract NetFlow Records from a .pcap file, however the data comes up in a non-readable format, like on the attached picture below.
I am unsure how to convert this into a readable format.
I essentially want to get the payload information from the packet capture.
I have tried using Python's scapy library, but I can still not convert it to human readable text.
I tried to decode this highlighted segment however i ran into some issues.
I used this code in order to decipher the content
hexed ="01000c0000000040000040400000803f0000003f2af0ce4004040000404000008040cdcc4c3ecdcccc3d305b1a3e2903fa42240000484400006144000048430000c8424ddc4143200000484400006144000048430000c84218380b440000000000000000000000000000000000000000000000000b010001deddf7420b0100016666e6400201000102000000000000000000000000305b1a3e4ddc414318380b4400010000000101000100010002000300121204000200010000050006000600ffffffff00000000deddf742"
ether_pkt = Ether(binascii.unhexlify(hexed))
ether_pkt.show()
And the result i got is:
How do i further decipher this content?
'\x80?\x00\x00\x00?*\xf0\xce#\x04\x04\x00\x00##\x00\x00\x80#\xcd\xccL>\xcd\xcc\xcc=0[\x1a>)\x03\xfaB$\x00\x00HD\x00\x00aD\x00\x00HC\x00\x00\xc8BM\xdcAC \x00\x00HD\x00\x00aD\x00\x00HC\x00\x00\xc8B\x188\x0bD\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0b\x01\x00\x01\xde\xdd\xf7B\x0b\x01\x00\x01ff\xe6#\x02\x01\x00\x01\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x000[\x1a>M\xdcAC\x188\x0bD\x00\x01\x00\x00\x00\x01\x01\x00\x01\x00\x01\x00\x02\x00\x03\x00\x12\x12\x04\x00\x02\x00\x01\x00\x00\x05\x00\x06\x00\x06\x00\xff\xff\xff\xff\x00\x00\x00\x00\xde\xdd\xf7B'
I've tried to .decode() and hex() in order to turn them into string however the output is not human readable
Have a look at pycomm3. Especially its CIP reference.
According to the reference, 0x4c is the "read_tag" custom service for Rockwell devices, whatever that means.
The data you highlighted is listed as "command specific data". That suggests that it is not defined in the CIP, but is custom to the device that sent it. If it had been part of the CIP, wireshark could probably have decoded it further. So you will have to find and read documentation for the device in question.
There is no magic, you need to download the specs and write a parser to decode it. As you can see in your wireshark screenshot, the protocol isn't string/ascii.
I am converting a Python 2 program to Python 3 and I'm not sure about the approach to take.
The program reads in either a single email from STDIN, or file(s) are specified containing emails. The program then parses the emails and does some processing on them.
SO we need to work with the raw data of the email input, to store it on disk and do an MD5 hash on it. We also need to work with the text of the email input in order to run it through the Python email parser and extract fields etc.
With Python 3 it is unclear to me how we should be reading in the data. I believe we need the raw binary data in order to do an md5 on it, and also to be able to write it to disk. I understand we also need it in text form to be able to parse it with the email library. Python 3 has made significant changes to the IO handling and text handling and I can't see the "correct" approach to read the email raw data and also use the same data in text form.
Can anyone offer general guidance on this?
The general guidance is convert everything to unicode ASAP and keep it that way until the last possible minute.
Remember that str is the old unicode and bytes is the old str.
See http://docs.python.org/dev/howto/unicode.html for a start.
With Python 3 it is unclear to me how we should be reading in the data.
Specify the encoding when you open the file it and it will automatically give you unicode. If you're reading from stdin, you'll get unicode. You can read from stdin.buffer to get binary data.
I believe we need the raw binary data in order to do an md5 on it
Yes, you do. encode it when you need to hash it.
and also to be able to write it to disk.
You specify the encoding when you open the file you're writing it to, and the file object encodes it for you.
I understand we also need it in text form to be able to parse it with the email library.
Yep, but since it'll get decoded when you open the file, that's what you'll have.
That said, this question is really too open ended for Stack Overflow. When you have a specific problem / question, come back and we'll help.
I am using Python to write some scripts that integrate two systems. The system scans mailboxes and searches for a specific subject line and then parses the information from the email. One of the elements I am looking for is an HTML link which I then use Curl to write the html code to a text file in text format.
My question is if the text in the email is in Japanese, are there any modules in Python that will automatically convert that text to English? Or do I have the convert to string to Unicode and then decode that?
Here is an example of what I am seeing. When I use curl to grab the text from the URL:
USB Host Stack 処理において解放されたメモリを不正に使用している
When I do a simple re.match to grab the string and write it to a file get this:
USB Host Stack æQtk0J0D0f0ã‰>eU0Œ0_0á0â0ê0’0Nckk0O(uW0f0D0‹0
I also get the following when I grab the email using the email module
>>> emailMessage.get_payload()
USB Host Stack =E5=87=A6=E7=90=86=E3=81=AB=E3=81=8A=E3=81=84=E3=81=A6=E8=A7=
=A3=E6=94=BE=E3=81=95=E3=82=8C=E3=81=9F=E3=83=A1=E3=83=A2=E3=83=AA=E3=82=92=
=E4=B8=8D=E6=AD=A3=E3=81=AB=E4=BD=BF=E7=94=A8=E3=81=97=E3=81=A6=E3=81=84=E3=
=82=8B
So, I guess my real question is what steps do I have to take to get this to convert to English correctly. I'd really like to take the first one which are Japanese characters and convert that to English.
Natural language translation is a very challenging problem, as others wrote. So look into sending strings to be translated to a service, e.g., google translate, which will translate them for you (poorly, but it's better than nothing) and send them back.
The following SO link shows one way: translate url with google translate from python script
Before you get that to work, you should sort out your encoding problems (unicode, uuencoding etc.) so that you're reading and writing text without corrupting it.
I'd like to extract the info string from an internet radio streamed over HTTP. By info string I mean the short note about the currently played song, band name etc.
Preferably I'd like to do it in python. So far I've tried opening a socket but from there I got a bunch of binary data that I could not parse...
thanks for any hints
Sounds like you might need some stepping stone projects before you're ready for this. There's no reason to use a low-level socket library for HTTP. There are great tools both command line utilities and python standard library modules like urlopen2 that can handle the low level TCP and HTTP specifics for you.
Do you know the URL where you data resides? Have you tried something simple on the command line like using cURL to grab the raw HTML and then some basic tools like grep to hunt down the info you need? I assume here the metadata is actually available as HTML as opposed to being in a binary format read directly by the radio streamer (which presumably is in flash perhaps?).
Hard to give you any specifics because your question doesn't include any technical details about your data source.