PERR_DSEQ
PERR_DSEQ(0) = ++hr->hr_seq;
if (PERR_DSEQ(i) == 0) {
hr->hr_seq = PERR_DSEQ(i);
if(HWMP_SEQ_GT(PERR_DSEQ(i), hr->hr_seq)) {
hr->hr_seq = PERR_DSEQ(i);
PERR_DSEQ(0) = 0; /* reserved */
PERR_DSEQ(0) = rt->rt_ext_seq;
PERR_DSEQ(0) = hr->hr_seq;
ADDWORD(frm, PERR_DSEQ(i));