ip6_asp_lookup
label = ip6_asp_lookup(&bc->cand_srcaddr, NULL, ipst);
label = ip6_asp_lookup(&cc->cand_srcaddr, NULL, ipst);
dstinfo.dst_label = ip6_asp_lookup(dst, NULL, ipst);
dlabel = ip6_asp_lookup(daddr, &dir->dir_precedence, ipst);
slabel = ip6_asp_lookup(saddr, NULL, ipst);
extern char *ip6_asp_lookup(const in6_addr_t *, uint32_t *, ip_stack_t *);