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1
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386
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IVI VISA (e.g.: NI VISA) is not setting the TCP Keep Alive correctly for all connections
The following C# code opens a VISA session to a measurement instrument:
// Connect
var vi = GlobalResourceManager.Open("TCPIP::10.0.0.2::hislip0::INSTR") as IMessageBasedSession;
// Set TCP ...
1
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1
answer
55
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Wireshark dissector - hf_register_info
In the function proto_type_field_array when you pass the header details to display the item in the wireshark dissector tree at runtime, is there a way to dynamically in your c code a way to change the ...
1
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2
answers
125
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How to write to custom Wireshark column via lua?
I'm trying to fill a custom column with infos via Lua in Wireshark.
What I've tried
local dienstname_f = ProtoField.string("customDienstname", "Dienstname")
local custom_proto = ...
1
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3
answers
60
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Is it possible to modify an existing dissection tree?
I'm trying to create a Lua dissector plugin for a custom protocol that uses Google Protocol Buffers to encode the bulk of the data - essentially the TCP stream consists of a delimited string ...
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0
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52
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BACnet/SC - TLS 1.3 "Alert: Close Notify" sent by node right after WebSocket upgrade — what does it indicate and how can I keep the session open?
Situation
I am bringing up a BACnet/SC testbed:
Role
Host
SW / FW
IP & Port
Hub
Windows 10 laptop
bacnet-sc-reference-stack (Java)
192.168.20.27:4443
Node
Azbil field controller (DEVICE_NO37)
...
-2
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1
answer
48
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tcpreplay doesn't send anything [closed]
I have a device which sends data to my PC over UDP. I want to write parser for this data and want to do it without the device. For achieving that I've created pcap dump of arriving data using tcpdump ...
1
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2
answers
220
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How can I send UDP data over the loopback interface so that Wireshark can dissect it without ICMP errors?
Initial Problem
I had what I thought was a simple task in Golang: format some data according to one of Wireshark's dissectors (MAC-LTE) and then send it over UDP so that it could be viewed in ...
1
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1
answer
325
views
How to register a Wireshark Lua dissector so it appears in the Decode As... dialog without an assigned port
I've written a Lua dissector that I use for data that has no designated port, port is assigned arbitrarily to deconflict with other traffic. If I register it to a specific UDP port, then I can find ...
1
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1
answer
65
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A Way To Get "direction" value from frame packet flags with pyshark
I've been struggling to find the syntax needed to obtain the "Inbound" flag within the frame layer of my packets
When I print(packet.frame) this is the output I get. I want the "...
0
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0
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45
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Why is PyShark only parsing one supported group from TLS ClientHello?
I'm using PyShark to extract supported groups from a TLS ClientHello. Even though Wireshark shows multiple supported groups, packet.tls.handshake_extensions_supported_group returns only one value ('...
0
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0
answers
58
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secure boost::beast::websocket server with SSLKEYLOGFILE support
I have a secure websocket server written with Boost Beast using Boost-asio. A significant portion of the connection code is documented here. The server uses RSA keys for TLS encryption. I would like ...
1
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0
answers
66
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How do I read a payload to a different IP with QUdpSocket?
I need to read the payload of a UDP message transmitted by a server with IP 172.19.66.100 with port 50493, to another server with IP 239.9.66.100 with port 1000.
With Wireshark I can read it, but I am ...
1
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1
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95
views
Winsocket UDP : works only when wireshark launched
I have FPGA device which is waiting for UDP packet "FFFF" on port 1000, then answers also with UDP "FFFF".
This code works fine, I see incoming "FFFF" packets on my JTAG, ...
0
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0
answers
28
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Seeing rst error when netscalar is trying to connect to REST API
Issue with test netscalar REST API. We do not see issues with local REST API. Attached tcp stream from wireshark.
Netscalar ip sends syn to app server then in second line in screenshot app server ...
0
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1
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62
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Windows CPU Scheduling, "Post-Wireshark" UDP receive latency?
I have developed a C# program that receives UDP packets and writes the received data to a queue on thread A. The program reads from the queue, performs some data processing, and then sends another UDP ...