wireshark-dissector

Wireshark Plugin: Dissecting Payloads With Multiple Packets Per UDP Frame

由 倖福魔咒の 提交于 2019-12-24 00:48:44
问题 I am writing a Wireshark plugin to dissect a protocol that places multiple application-level packets in a single UDP frame. There is no enclosing protocol that indicates how many packets there are in the frame. So essentially, the payload coming down the wire will look like this: uint64 sequence1 uint64 data1 uint8 flags1 uint64 sequence2 uint64 data2 uint8 flags2 : : : uint64 sequence_n uint64 data_n uint8 flags_n In my server code that actually processes this information, I simply loop

Pyshark: can only get first field value if same key name (field name) show multiple entries with different value

由 好久不见. 提交于 2019-12-23 18:11:10
问题 I am using Pyshark to parse Wireshark sniffer log, and I used exported Json format file (based on pcapny file) to find field names when use 'get_field_value' function to retrieve field value. For example, in order to get BSSID value: In Json format file, this info is displayed as "wlan.bssid": "11:22:33:44:55:66" Then I could use: value = packet['wlan'].get_field_value('bssid') Result is expected: value == '11:22:33:44:55:66' For this case, it is working fine. But I encounter an issue with

Wireshark Lua Dissector for IEEE 802.15.4 - DissectorTable name?

由 坚强是说给别人听的谎言 提交于 2019-12-22 11:34:09
问题 I'm working on a wireshark dissector in lua to dissect a custom protocol that is based on 802.15.4. Unfortunately I cannot figure out the right DissectorTable name: table = DissectorTable.get("wpan") -- wpan does not work table:add(0, myProto) -- I'm unsure about the first argument here What dissector table name do I have to use to create the described dissector? and what goes as a first argument for the add function? Thanks in advance! EDIT I figured out that I have to do it this way: table

How can I add a custom protocol analyzer to wireshark?

由 青春壹個敷衍的年華 提交于 2019-12-20 08:28:00
问题 I have a custom protocol that I'm looking at in wireshark. I thought it'd be useful if wireshark could disect it for me so that I don't have to decode the hex. Although I'm doing this in my program logs, wireshark captures the whole conversation with timing info so it'd be more useful there. Can this be easily done? 回答1: It depends on your definition of "easily". It's definitely doable - Wireshark has great support for pluggable dissectors. README.developer is apparently the "best manual" for

Writing a Wireshark dissector to count number of TCP flows

由 对着背影说爱祢 提交于 2019-12-13 02:13:50
问题 I have a very large tcpdump file that I split into 1 minute intervals. I am able to use tshark to extract TCP statistics for each of the 1 minute files using a loop code and save the results as a CSV file so I can perform further analysis in Excel. Now I want to be able to count the number of TCP flows in each 1 minute file for all the 1 minute files and save the data in a CSV file. A TCP flow here represents group of packets going from a specific source to a specific destination. Each flow

selecting major flows at once in a huge pcap in wireshark

由 社会主义新天地 提交于 2019-12-11 06:43:41
问题 i have a large pcap with more than 1000 tcp flows. i want to filter major flows say with packets greater than 100. if i go to conversations and right click on those flows, i can filter those flows, but then i have to do it several times and since i have huge pcap, it may exceed 100. is there any other quick display filter i can use which will give me flows having number of packets > n (n being any +ve integer). say some filter like : flow.num_pkt > 100 which can give me all such flows. thanks

Wireshark dissector - How to use dissectortable:add(pattern, dissector) with ANY pattern?

由 人走茶凉 提交于 2019-12-11 02:25:29
问题 I am creating a custom dissector for Wireshark. I am adding my dissector to the dissector table kind of like this... udp_table = DissectorTable.get("udp.port") udp_table:add(7777,my_proto) However, instead of my dissector handling just udp port 7777, I want it to handle ANY udp port or at least a really large range. How can I do this? It says in the documentation, it says I can replace 7777 (the pattern) with a range, but I'm not sure what the syntax is for that. Thank you! 回答1: In theory a

How to automate conversion of C++ file to Wireshark Lua dissector

由 孤街醉人 提交于 2019-12-10 17:12:25
问题 I have a C++ file defining a certain protocol. The file contains structs which define the messages used in the protocol. Each struct contains fields for a certain message. An example would be as follows: struct STATS00_MESSAGE_T { uint8_t message_type uint16_t num_sends; uint8_t num_failures; }; What is the best or easiest way to convert a C++ file containing a lot of structs like these into a Lua dissector for Wireshark? The Lua dissector should be able to dissect the fields of the messages.

Wireshark Lua Dissector for IEEE 802.15.4 - DissectorTable name?

由 ℡╲_俬逩灬. 提交于 2019-12-06 04:29:09
I'm working on a wireshark dissector in lua to dissect a custom protocol that is based on 802.15.4. Unfortunately I cannot figure out the right DissectorTable name: table = DissectorTable.get("wpan") -- wpan does not work table:add(0, myProto) -- I'm unsure about the first argument here What dissector table name do I have to use to create the described dissector? and what goes as a first argument for the add function? Thanks in advance! EDIT I figured out that I have to do it this way: table = DissectorTable.get("wtap_encap") table:add(104, myProto) where 104 stands for 802.15.4. I found it by

How can I add a custom protocol analyzer to wireshark?

由 非 Y 不嫁゛ 提交于 2019-12-02 17:17:30
I have a custom protocol that I'm looking at in wireshark. I thought it'd be useful if wireshark could disect it for me so that I don't have to decode the hex. Although I'm doing this in my program logs, wireshark captures the whole conversation with timing info so it'd be more useful there. Can this be easily done? Matti Virkkunen It depends on your definition of "easily". It's definitely doable - Wireshark has great support for pluggable dissectors. README.developer is apparently the "best manual" for dissector development. Take a look, and decide for yourself. You can write dissectors using
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