| // SPDX-License-Identifier: GPL-2.0 |
| // |
| // Basic TFO server test |
| // |
| // Test TFO_SERVER_COOKIE_NOT_REQD flag on receiving |
| // SYN with data but without Fast Open cookie option. |
| |
| `./defaults.sh |
| ./set_sysctls.py /proc/sys/net/ipv4/tcp_fastopen=0x202` |
| |
| 0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3 |
| +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 |
| +0 bind(3, ..., ...) = 0 |
| +0 listen(3, 1) = 0 |
| +0 setsockopt(3, SOL_TCP, TCP_FASTOPEN, [1], 4) = 0 |
| |
| // Since TFO_SERVER_COOKIE_NOT_REQD, a TFO socket will be created with |
| // the data accepted. |
| +0 < S 0:1000(1000) win 32792 <mss 1460,sackOK,nop,nop> |
| +0 > S. 0:0(0) ack 1001 <mss 1460,nop,nop,sackOK> |
| +0 accept(3, ..., ...) = 4 |
| +0 %{ assert (tcpi_options & TCPI_OPT_SYN_DATA) != 0, tcpi_options }% |
| +0 read(4, ..., 1024) = 1000 |
| |
| // Data After SYN will be accepted too. |
| +0 < . 1001:2001(1000) ack 1 win 5840 |
| +0 > . 1:1(0) ack 2001 |
| |
| // Should change the implementation later to set the SYN flag as well. |
| +0 read(4, ..., 1024) = 1000 |
| +0 write(4, ..., 1000) = 1000 |
| +0 > P. 1:1001(1000) ack 2001 |
