asn_parse_sequence
uchar_t *asn_parse_sequence(uchar_t *, size_t *, uchar_t);
if ((p = asn_parse_sequence(reply_pkt, &msgsz, exp_id)) == NULL) {
if ((p = asn_parse_sequence(p, msgsz_p, exp_id)) == NULL)
if ((p = asn_parse_sequence(msg, msgsz_p, exp_id)) == NULL)