TCPOLEN_EXP_FASTOPEN_BASE
if (opsize >= TCPOLEN_EXP_FASTOPEN_BASE &&
TCPOLEN_EXP_FASTOPEN_BASE,
need += fastopen->cookie.exp ? TCPOLEN_EXP_FASTOPEN_BASE :
need += foc->exp ? TCPOLEN_EXP_FASTOPEN_BASE :
len = TCPOLEN_EXP_FASTOPEN_BASE + foc->len;
p += TCPOLEN_EXP_FASTOPEN_BASE;