I try to get Read all HTTP URLs from PCAp file using this command line command:
tshark -R -e http.request.uri -r C:file.pcap
And got the message
tshark: -R without -2 is deprecated. For single-pass filtering use -Y.
What's wrong with my filter ?
Using the filter as single pass, like suggested, does it for me:
tshark -Y http.request.uri -r capturefile
Related
I am trying to do packet capture analysis with tshark on about 30000 files looking for a needle in the haystack.The files containing interesting needles contain icmp failures. I wrote a script which iterates though these files with tshark but they all return 0 results.
tshark -r <filename> -Y "icmp.no_resp"
tshark -r <filename> -Y "icmp.resp_not_found"
Both ofthese commands yield 0 results. However when I open a specific file and use the display filter "icmp.no_resp" or "icmp.resp_not_found" I see results.
Is this a bug in T-shark where it can't identify response not found?
I'm running tshark/wireshark v3.6.7 on Ubuntu
I figured it out.
tshark requires multiple passes to identify certain display filters. Doing a command like so creates this.
tshark -r <filename> -Y "icmp.resp_not_found" -2
I hope this helps someone in the future.
I am trying to trying to get the packets which contain application layer payloads like HTTP from a given pcap file.
I have tried using http in the Wireshark display filter. My doubt is that, is it the right way to get the http payload from the pcap file. Please help me on this.
Saving HTTP packets
To filter for http traffic in tshark, you would use a display filter (-Y). This is sample output showing what that would look like:
$ tshark -r input.pcap -Y http
25 1.051399 10.8.143.109 → server-13-35-127-122.sfo5.r.cloudfront.net HTTP
630 GET /online HTTP/1.1 0c:8d:db:90:cf:38 ← 6c:96:cf:d8:7f:e7
34 1.078368 server-13-35-127-122.sfo5.r.cloudfront.net → 10.8.143.109 HTTP
404 HTTP/1.1 304 Not Modified 6c:96:cf:d8:7f:e7 ← 0c:8d:db:90:cf:38
This shows them output as text (the default). To output them to a new file, use the -w flag:
$ tshark -r input.pcap -Y http -w modified.pcap
Export files
You can also export certain types of plaintext objects from tshark
$ output_folder="files"
$ tshark -r input.pcap --export-object http,$output_folder
$ ls $output_folder
example.png example.html ...
This article will walk you through generating a packet capture from which you can then export HTTP files.
is there any lvm.conf editor?
I'm trying to set global_filter, use_lvmtad and some other options, currently using sed:
sed -i /etc/lvm/lvm.conf \
-e "s/use_lvmetad = 1/use_lvmetad = 0/" \
-e "/^ *[^#] *global_filter/d" \
-e "/^devices {/a\ global_filter = [ \"r|/dev/drbd.*|\", \"r|/dev/dm-.*|\", \"r|/dev/zd.*|\" ]"
but I don't like this too much, is there any better way?
I found only lvmconfig tool, but it can only display certain configuration sections, and can't edit them.
If you using Ubuntu variant then you can use the LVM GUI to configure and manage the LVM. Refer this link
It seems that augtool is exactly what I was looking for.
These two packages should be enough to proper processing lvm.conf file:
apt install augeas-tools augeas-lenses
Example usage:
augtool print /files/etc/lvm/lvm.conf
And you should get the whole parse tree on stdout.
If the parser fails you won’t get any output, print the error message using:
augtool print /files/etc/lvm/lvm.conf/error
The augtool equivalent for the sed command from the original question:
augtool -s <<EOT
set /files/etc/lvm/lvm.conf/global/dict/use_lvmetad/int "0"
rm /files/etc/lvm/lvm.conf/devices/dict/global_filter
set /files/etc/lvm/lvm.conf/devices/dict/global_filter/list/0/str "r|^/dev/drbd.*|"
set /files/etc/lvm/lvm.conf/devices/dict/global_filter/list/1/str "r|/dev/dm-.*|"
set /files/etc/lvm/lvm.conf/devices/dict/global_filter/list/2/str "r|/dev/zd.*|"
EOT
The script (macOS) is called as such:
./Sharksort <all or part of wlan.addr> file-name
example: ./Sharkesort 42:80 Store-1-pass1.pcapng
The output should be all traffic to/from clients containing 42:80 in their hardware address.
for stream in tshark -r $2 -Y "wlan.addr contains $1";
do
tshark -r $2 -w client-$1.pcapng;
done
I am getting the following:
tshark: An error occurred while writing to the file "client-42:80.pcapng": Internal error.
tshark: An error occurred while writing to the file "client-42:80.pcapng": Internal error.
tshark: An error occurred while writing to the file "client-42:80.pcapng": Internal error.
The output file contains only the 1st few packets.
Thanks for your help.
Why the for loop? Why not just do this?
tshark -r $2 -Y "wlan.addr contains $1" -w client-$1.pcapng
the -F option before the -w option is key
For some automation purpose I have below requirements for the Wireshark log file(.pcap).
1-Conversion of Wireshark logs(.pcap file ) to text file with detail of packets.
2-Conversion of Wireshark logs (.pcap file) to text file with some filter (eg: bssgp.pdu_type == 0x00) with detail of packets.
I know how to convert the wireshark files to text file through GUI,
But I need the cli commands for the same to automate the procedure.
Thanks in advance
To convert a .pcap file to text output, you can run:
tshark -V -r file.pcap > file.txt
If you only want to convert certain packets that match a Wireshark display filter, then using your filter, you can run:
tshark -Y "bssgp.pdu_type == 0x00" -V -r file.pcap > file.txt
If the -V option provides too much detail, you can limit the detail to specific protocol(s) by using the -O option instead. For example, to provide details for bssgp only and a summary for all other protocols, try:
tshark -Y "bssgp.pdu_type == 0x00" -O bssgp -r file.pcap > file.txt
Refer to the tshark man page for more details about these options.