https://www.toolwar.com/2014/02/simple-packet-sender-srs-packet.html
Simple Packet Sender- SRS (Packet Crafting) :: Tools - ToolWar | Information Security (InfoSec)...
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https://packetsender.com/
Packet Sender - Free utility to for sending / receiving of network packets. TCP, UDP, SSL, DTLS.
Packet Sender is a free utility to for sending / receiving of network packets. Support for TCP, UDP, SSL, and DTLS.
https://lists.mcs.anl.gov/pipermail/mpich-discuss/2010-June/007422.html
[mpich-discuss] Dismatch in the data size field of ch3 packet header between sender and receiver