ND_OPT_NONCE_LEN
#if ((ND_OPT_NONCE_LEN + 2) % 8) != 0
u_int8_t nd_opt_nonce[ND_OPT_NONCE_LEN];
((ND_OPT_NONCE_LEN + sizeof(uint32_t) - 1)/sizeof(uint32_t))
n->nd_opt_nonce_len == (ND_OPT_NONCE_LEN + 2) / 8 &&
ND_OPT_NONCE_LEN) == 0) {
int optlen = sizeof(struct nd_opt_hdr) + ND_OPT_NONCE_LEN;
bcopy(nonce, (caddr_t)(nd_opt + 1), ND_OPT_NONCE_LEN);