1// SPDX-License-Identifier: GPL-2.0 2// 3// Basic TFO server test 4// 5// Test that TFO-enabled server would not respond SYN-ACK with any TFO option 6// when receiving a pure SYN-data. It should respond a pure SYN-ack. 7 8`./defaults.sh` 9 10 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 11 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 12 +0 bind(3, ..., ...) = 0 13 +0 listen(3, 1) = 0 14 +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 15 16 +0 < S 999000:999040(40) win 32792 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 6> 17 +0 > S. 1234:1234(0) ack 999001 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 8> 18 +0 < . 1:1(0) ack 1 win 100 19 +0 accept(3, ..., ...) = 4 20 +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }% 21 +0 close(3) = 0 22 23// Test ECN-setup SYN with ECN disabled because this has happened in reality 24 +0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 25 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 26 +0 bind(3, ..., ...) = 0 27 +0 listen(3, 1) = 0 28 +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 29 30 +0 < SEW 999000:999040(40) win 32792 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 6> 31 +0 > S. 1234:1234(0) ack 999001 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 8> 32 +0 < . 1:1(0) ack 1 win 100 33 +0 accept(3, ..., ...) = 4 34 +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }% 35 +0 close(3) = 0 36 37// Test ECN-setup SYN w/ ECN enabled 38 +0 `sysctl -q net.ipv4.tcp_ecn=2` 39 +0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 40 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 41 +0 bind(3, ..., ...) = 0 42 +0 listen(3, 1) = 0 43 +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 44 45 +0 < SEW 999000:999040(40) win 32792 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 6> 46 +0 > SE. 1234:1234(0) ack 999001 <mss 1460,sackOK,TS val 100 ecr 100,nop,wscale 8> 47 +0 < . 1:1(0) ack 1 win 100 48 +0 accept(3, ..., ...) = 4 49 +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) == 0, tcpi_options }% 50 +0 close(3) = 0 51