ND_OPT_PREFIX_INFORMATION
po->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
case ND_OPT_PREFIX_INFORMATION:
case ND_OPT_PREFIX_INFORMATION:
opt.nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
case ND_OPT_PREFIX_INFORMATION:
case ND_OPT_PREFIX_INFORMATION: {
pip->nd_opt_pi_type = ND_OPT_PREFIX_INFORMATION;
if (opt->nd_opt_type == ND_OPT_PREFIX_INFORMATION) {