r0 = socket$inet_tcp(0x2, 0x1, 0x0)
setsockopt$inet_tcp_TCP_FASTOPEN_KEY(r0, 0x6, 0x21, &(0x7f0000000080)="cf7f1001909e16a529bfacd54ada83cc", 0x10)
getsockopt$inet_tcp_buf(r0, 0x6, 0x21, 0x0, &(0x7f0000000180))