INP_HIGHPORT
if (inp->inp_flags & INP_HIGHPORT) {
#define IN6P_HIGHPORT INP_HIGHPORT /* user wants "high" port */
if (inp->inp_flags & INP_HIGHPORT)
inp->inp_flags &= ~(INP_HIGHPORT);
inp->inp_flags |= INP_HIGHPORT;
inp->inp_flags &= ~(INP_HIGHPORT);