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Re:Why is my tcp not reliable? (2009) by cperciva on Sunday April 02, 2017 @01:55AM (#14016013)
It's a Berkeleyism. It's not TCP, it's old Berkeley Sockets semantics. [...] Linux does support it, with the "shutdown(2)" call.

The shutdown(2) system call was added to BSD on January 8th, 1983: https://svnweb.freebsd.org/csrg?view=revision&revision=10208

So... Berkeley Sockets supported this a bit more than 8 years before Linux even existed. This is totally not a Berkeley Sockets problem.

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