TCPOLEN_SACK_PERMITTED
&& optlen == TCPOLEN_SACK_PERMITTED) {
if (optlen != TCPOLEN_SACK_PERMITTED)
if (tcp_do_sack && OPT_FITS(TCPOLEN_SACK_PERMITTED)) {
*optp++ = TCPOLEN_SACK_PERMITTED;
optlen += TCPOLEN_SACK_PERMITTED;
*optp++ = TCPOLEN_SACK_PERMITTED;
optlen += TCPOLEN_SACK_PERMITTED;