there's tcpdump - but what about the other way around? Something like telnet, maybe.
Yes, there is "telnet". But - telnet is not necessarily installed on the system and telnet does not display hex data like sfk does.
So would you consider this as a feature wish?
I'll write it down as a feature request, and actually there is already some inofficial command. You may try
which has the same syntax as udpsend, however as it is now "-listen" is default. for example,
sfk tcpsend host 80 "GET / HTTP/1.1" 0x0d0a0d0a
should dump the index page of a web server.
Play around with it, maybe you could comment how it could be extended.
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