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List:       lartc
Subject:    Linux kernel network debug mode
From:       Martin T <m4rtntns () gmail ! com>
Date:       2017-10-04 17:02:51
Message-ID: CAJx5YvEqrzjhZMUAHK88yZdaW2KiQSx1jfk+-Fg53Y27PZYjOw () mail ! gmail ! com
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Hi!

I'm troubleshooting a complicated issue where server replies to one
specific client initial TCP three-way-handshake SYN packet with a long
delay, i.e one can see several TCP SYN packets from the client before
server TCP/IP stack replies with a SYN+ACK. Is it possible to see what
happens with a packet in Linux TCP stack? I checked kernel ring
buffer, but there was nothing interesting/helpful. For example some
network equipment vendors allow one to enable packet tracing which
shows in great detail the day in the life of an packet in device.


thanks,
Martin
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