INP_LOWPORT
sotoinpcb(so)->inp_flags |= INP_LOWPORT;
} else if (inp->inp_flags & INP_LOWPORT) {
#define IN6P_LOWPORT INP_LOWPORT /* user wants "low" port */
else if (inp->inp_flags & INP_LOWPORT)
inp->inp_flags &= ~(INP_LOWPORT);
inp->inp_flags &= ~(INP_LOWPORT);
inp->inp_flags |= INP_LOWPORT;