From 8e0c6f7a623f77ed26cb05c115770154bc28877b Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Tue, 27 Sep 2022 16:41:43 +0200
Subject: [PATCH] Add tcpdump for XST.
---
doc/erko_howto_tools.txt | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/doc/erko_howto_tools.txt b/doc/erko_howto_tools.txt
index a090fb4232..6ce5384f84 100755
--- a/doc/erko_howto_tools.txt
+++ b/doc/erko_howto_tools.txt
@@ -487,6 +487,40 @@ then:
> ifconfig # to find ethernet port
> sudo tcpdump -vvXXSnelfi enp5s0 port 5001 # for UDP only
> sudo tcpdump -vvXXSnelfi enp5s0 port 5001 > tcpdump.txt (> is new file, >> is append)
+ > 5001 = SST, 5003 = XST
+
+
+ Start tcpdump in one terminal and then the offload test in another terminal
+ > sudo tcpdump -vvXXSnelfi enp5s0 port 5003 > tcpdump.txt
+ > stat_stream_xst.py --host 10.99.0.250 --port 4842 --ip dop386 --mac dop386 --test-data --nof_crosslets 4 -vv
+
+ Stop tcpdump cntr-c
+
+ > more tcpdump.txt
+
+ Typical header values
+ . udp dest port = 5003 = 0x138b
+ . udp lenght = 2344 = 0x928
+ . marker = 0x58
+ . version = 5
+ . observation id = 0x00000000
+ . station id = 0x0000
+ . block period = 5120 = 0x1400, followed by 8 octetB BSN
+
+ Grep all packets for one BSN --> 576 / 144 = 4 nof_crosslets
+
+ > cat tcpdump.txt | grep '1400 0001 27a1 aa03 3599' | wc
+ 576 5760 39168
+
+ Grep all received packets --> 8064 / 576 = 14 intervals
+
+ > cat tcpdump.txt | grep '0x0040: 1400' | wc
+ 8064 80640 548352
+
+ Try again for nof_crosslets = 7:
+
+ cat tcpdump.txt | grep '0x0040: 1400' | wc
+ 11843 118430 805324
5) opcua-client & # to verify sdp_rw.py
- opc.tcp://10.99.0.250:4842 RPi4 connect
--
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