Which kernel adds the TCP_USER_TIMEOUT socket option?

Solution Verified - Updated -

Issue

  • Which kernel adds the TCP_USER_TIMEOUT socket option?

Environment

  • Red Hat Enterprise Linux 6
  • TCP sockets with TCP_USER_TIMEOUT socket option
  • Does RHEL implement the RFC793 "user timeout" and/or the RFC5482 "TCP User Timeout Option"?
  • How can I change the timeout of unacknowledged data in ESTABLISHED, FIN-WAIT-1, FIN-WAIT-2, CLOSE-WAIT, CLOSING, or LAST-ACK socket states?

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