1// SPDX-License-Identifier: GPL-2.0 2// 3// Test the Experimental Option 4// 5// SYN w/ FOEXP w/o cookie must generates SYN+ACK w/ FOEXP 6// w/ a valid cookie, and the cookie must be the same one 7// with one generated by IANA FO 8 9`./defaults.sh` 10 11// Request a TFO cookie by Experimental Option 12// This must generate the same TFO_COOKIE 13 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 14 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 15 +0 bind(3, ..., ...) = 0 16 +0 listen(3, 1) = 0 17 +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 18 19 +0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop,FOEXP> 20 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,FOEXP TFO_COOKIE> 21 22 +0 close(3) = 0 23 24// Test if FOEXP with a valid cookie creates a TFO socket 25 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 26 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 27 +0 bind(3, ..., ...) = 0 28 +0 listen(3, 1) = 0 29 +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 30 31 +0 < S 0:10(10) win 32792 <mss 1460,sackOK,nop,nop,FOEXP TFO_COOKIE> 32 +0 > S. 0:0(0) ack 11 <mss 1460,nop,nop,sackOK> 33 34 +0 accept(3, ..., ...) = 4 35 +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }% 36 37 +0 read(4, ..., 512) = 10 38