addr16
u_int16_t addr16[8];
#define addr16 ipa.addr16
if (!addr->addr16[i]) {
b = ntohs(addr->addr16[i]);
const u_int16_t *n = an->addr16;
const u_int16_t *o = a->addr16;
u_int16_t addr16[8];
#define addr16 pfa.addr16
uint16_t addr16[8];
#define addr16 xa.addr16