Is it possible to use tshark to check whether one or more ip addresses appear in a pcap file? I know that I can display all occurrences with tshark -r infile -w outfile ip.addr==172.26.29.2 || ip.addr==172.26.31.21, but is there an option to not display all (maybe only the first occurrence.)?
You should be able to achieve this, either taking these few steps:
Get the list of all source IP addresses:
tshark -r infile -Y "ip" -T fields -e ip.src > infile_ips.txt
Append with the list of all destination IP addresses:
tshark -r infile -Y "ip" -T fields -e ip.dst >> infile_ips.txt
Ensure all IPs are listed on separate lines, which they might not be in the case of tunneled IPs or for ICMP errors, then sort the list and eliminate duplicates:
cat infile_ips.txt | tr , '\n' | sort -u
Or a bit more easily using this single step:
tshark -r infile -Y "ip" -T fields -e ip.addr | tr , '\n' | sort -u
Once you have the list of all unique IP addresses present in the capture file, you can search that list for whatever IP address you're interested in by using grep or by whatever other means you want.
Refer to the tshark man page for more information regarding the options I used above.
Another command that would work would be
tshark -q -z endpoints,ip -z endpoints,ipv6 -r infile
which would produce tables of IPv4 and IPv6 addresses, as well as, for each address, information about the amount of data transmitted from and to that address.
Related
I want to convert a pcap file to csv/tsv with "Tshark" where each line corresponds to a packet and have the following format:
timestamp src_ip dst_ip protocol
I use this command:
tshark -r <file_name.pcap> -T fields -e frame.time_epoch -e ip.src -e ip.dst -e ip.proto
However, in the displayed output I see some lines to have two src,dst IP addresses and protocol number like this:
1525794300.3842 92.153.107.1,203.46.108.229 203.46.108.229,85.50.172.78 1,1
While for the rest, each line has one src IP, one dst IP and one protocol like the following:
1525794300.3843 185.61.46.124 163.218.99.213 6
Is there any reason that tshark is displaying multiple src and dst ip addresses in a single line? Can we do something so tshark does not do this?
Thanks!
The reason tshark displays multiple src and dst IP addresses as well as multiple protocol numbers is because there are multiple IP headers in the packet. In this case, it's ICMP packet carrying information about another ICMP packet, perhaps a "Time to live exceeded in transit" or some other such error. If you open the file in Wireshark or run tshark -r <file_name.pcap> -Y "icmp", you will be able to see this for yourself.
If you're only interested in the first (outer) IP src and dst addresses and protocol number, then you can limit the output to the first occurrence of each field as follows:
tshark -r <file_name.pcap> -T fields -E occurrence=f -e frame.time_epoch -e ip.src -e ip.dst -e ip.proto
Alternatively, you can specify columns while limiting the field occurrences this way:
On *nix:
tshark -r <file_name.pcap> -o 'gui.column.format:"Epoch Time","%Cus:frame.time_epoch","Src","%Cus:ip.src:1","Dst","%Cus:ip.dst:1","Proto","%Cus:ip.proto:1"'
On Windows:
tshark.exe -r <file_name.pcap> -o "gui.column.format:\"Epoch Time\",\"%Cus:frame.time_epoch\",\"Src\",\"%Cus:ip.src:1\",\"Dst\",\"%Cus:ip.dst:1\",\"Proto\",\"%Cus:ip.proto:1\""
Run tshark -G column-formats for additional help with the column formats.
I have a pcap of ICMP packets. I am trying to use tshark to extract the payload data so that I can extract a specific byte offset.
The tshark documentation is highly convoluted, especially for me, a beginner.
I've been searching around a lot and I'm trying to piece together a command for the purpose of my goal.
I can run the following command:
shark -r test.pcapng -Y icmp -z flow,icmp,network > output.bin
But it only outputs the packet list as it were shown in Wireshark.
For example, I am trying to extract the following byte offset from each packet (offset 22):
How would I go about extracting a specific byte offset with tshark?
EDIT:
Issuing the following command only returns a portion of the payload data, how can I get all of it?
tshark -r test.pcapng -Y "frame.number == 13" -T fields -e data -w output.bin
I've provided an answer over at https://ask.wireshark.org/question/14795/extract-specific-byte-offset-using-tshark/, but for convenience, I'll summarize the 2 possible solutions I provided here. In a nutshell:
The highlighted byte in the image appears to be the TTL field of the IP header. If that's the field you're interested in, you can obtain it via:
tshark -r test.pcapng -Y "frame.number == 13" -T fields -e ip.ttl -w output.bin
If you're looking for a more general solution to print the 22nd byte of the packet, regardless of whether it's the ip.ttl field or not, then you can use a solution such as:
tshark -r test.pcapng -Y "frame.number == 13" -x -w output.bin | grep "^0010" | cut -d ' ' -f 9
The 2nd solution above also illustrates how you can dump all the bytes; it's done using tshark's -x option.
I am trying to capture packet using tshark and I want to add filter for wlan source address , so I tried below three steps but none of them worked .
ubuntu:/home/test$ tshark -i mon0 -w /tmp/test11.pcap -a duration:15 -R
(wlan.sa == 3e:52:82:c1:2e:a9)"
tshark: -R without -2 is deprecated. For single-pass filtering use -Y.
ubuntu:/home/test$ tshark -i mon0 -w /tmp/test11.pcap -a duration:15 -Y "
(wlan.sa == 3e:52:82:c1:2e:a9)"
tshark: Display filters aren't supported when capturing and saving the captured packets.
ubuntu:/home/test$ tshark -i mon0 -w /tmp/test11.pcap -a duration:15 -2R "
(wlan.sa == 3e:52:82:c1:2e:a9)"
tshark: Live captures do not support two-pass analysis.
How to add the filter for wlan address
You're using tshark in capture mode (vs. offline, on a capture file), so you need to use a capture filter, which have their own syntax (same as tcpdump as far as I know). There's no flag needed for capture filter (no -R or -Y):
tshark -i mon0 -w /tmp/test11.pcap -a duration:15 ether src 3e:52:82:c1:2e:a9
I would like to know if there is a way to save only No., Time, Source, Destination, Length field in Wireshark? I do not need the contents, I want it in plain text as well. Is this possible? Thank you.
If those are your only columns configured in Wireshark, then after loading a capture file you achieve this as follows: File -> Export Packet Dissections -> as "Plain Text" file... ->, then in the Packet Format section, select only the "Packet summary line" (and optionally "Include column headings" if you wish) and deselect everything else. Choose a filename and click "Save".
If you have other columns displayed, you can either hide or remove them first or create a separate profile with only the columns of interest displayed.
You can also accomplish this with tshark, Wireshark's command-line companion. There are several ways to do this, so select a method that best fits your needs. Here are some examples:
Using specified Wireshark columns: (Note: -e _ws.col.No. doesn't work)
tshark -r file.pcap -T fields -e frame.number -e _ws.col.Time -e _ws.col.Source -e _ws.col.Destination -e _ws.col.Length > file.txt
Using named fields: (assumes IPv4 addresses in Source and Destination columns)
tshark -r file.pcap -T fields -e frame.number -e frame.time -e ip.src -e ip.dst -e frame.len > file.txt
Rely on Wireshark's configured columns:
tshark -r file.pcap > file.txt
Rely on Wireshark's configured columns for a particular profile:
tshark -r file.pcap -C profilename > file.txt
Using column option: (First on Windows, then on *nix)
tshark -r file.pcap -o "gui.column.format:\"No.\",\"%m\",\"Time\",\"%t\",\"Source\",\"%s\",\"Destination\",\"%d\",\"Length\",\"%L\"" > file.txt
tshark -r file.pcap -o 'gui.column.format:"No.","%m","Time","%t","Source","%s","Destination","%d","Length","%L"" > file.txt
(Run tshark -G column-formats for more column options.)
Given a pcap file, I'm able to extract a lot of information from the reconstructed HTTP request and responses using the neat filters provided by Wireshark. I've also been able to split the pcap file into each TCP stream.
Trouble I'm running into now is that of all the cool filters I'm able to use with tshark, I can't find one that will let me print out full request/response bodies. I'm calling something like this:
tshark -r dump.pcap -R "tcp.stream==123 and http.request" -T fields -e http.request.uri
Is there some filter name I can pass to -e to get the request/response body? The closest I've come is to use the -V flag, but it also prints out a bunch of information I don't necessary want and want to avoid having to kludge out with a "dumb" filter.
If you are willing to switch to another tool, tcptrace can do this with the -e option. It also has an HTTP analysis extension (xHTTP option) that generates the HTTP request/repsonse pairs for each TCP stream.
Here is a usage example:
tcptrace --csv -xHTTP -f'port=80' -lten capturefile.pcap
--csv to format output as comma sperated variable
-xHTTP for HTTP request/response written to 'http.times' this also switches on -e to dump the TCP stream payloads, so you really don't need -e as well
-f'port=80' to filter out non-web traffic
-l for long output form
-t to give me progress indication
-n to turn off hostname resolution (much faster without this)
If you captured a pcap file, you can do the following to show all requests+responses.
filename="capture_file.pcap"
for stream in `tshark -r "$filename" -2 -R "tcp and (http.request or http.response)" -T fields -e tcp.stream | sort -n | uniq`; do
echo "==========BEGIN REQUEST=========="
tshark -q -r "$filename" -z follow,tcp,ascii,$stream;
echo "==========END REQUEST=========="
done;
I just made diyism answer a bit easier to understand (you don't need sudo, and multiline script is imo simple to look at)
This probably wasn't an option when the question was asked but newer versions of tshark can "follow" conversations.
tshark -nr dump.pcap -qz follow,tcp,ascii,123
I know this is a super old question. I'm just adding this for anyone that ends up here looking for a current solution.
I use this line to show last 10 seconds request body and response body(https://gist.github.com/diyism/eaa7297cbf2caff7b851):
sudo tshark -a duration:10 -w /tmp/input.pcap;for stream in `sudo tshark -r /tmp/input.pcap -R "tcp and (http.request or http.response) and !(ip.addr==192.168.0.241)" -T fields -e tcp.stream | sort -n | uniq`; do sudo tshark -q -r /tmp/input.pcap -z follow,tcp,ascii,$stream; done;sudo rm /tmp/input.pcap