v6addr2str
len, v6addr2str(&ss2sin6(&pc->pc_dst)->sin6_addr),
const char *v6addr2str(struct in6_addr *);
"address %s", v6addr2str(&linkaddr));
v6addr2str(&ss2sin6(&pc->pc_srcorig)->sin6_addr),
v6addr2str(&ss2sin6(&pc->pc_dst)->sin6_addr),
v6addr2str(&ss2sin6(&pc->pc_src)->sin6_addr));