TCP Fast Open

Jeremy Harris jgh at wizmail.org
Thu Dec 5 15:25:29 UTC 2019


Hi,

12.1 kernel with TCP_RFC7413
net.inet.tcp.fastopen.server_enable: 1
net.inet.tcp.fastopen.client_enable: 1


Using code copied from
  https://people.freebsd.org/~pkelsey/tfo-tools/tfo-client.c

I'm not seeing any TFO option on SYN.  This is on a loopback
connection.

Also, it appears to make no difference to the success of the
sendto whether or not TCP_FASTOPEN was set on the socket, adding to
the confusion.

What might I be doing wrong?
-- 
Cheers,
  Jeremy


More information about the freebsd-transport mailing list