wg_aip_lookup
allowed_peer = wg_aip_lookup(sc, AF_INET, &ip->ip_src);
allowed_peer = wg_aip_lookup(sc, AF_INET6, &ip6->ip6_src);
peer = wg_aip_lookup(sc, AF_INET, &mtod(m, struct ip *)->ip_dst);
peer = wg_aip_lookup(sc, AF_INET6, &mtod(m, struct ip6_hdr *)->ip6_dst);
static struct wg_peer *wg_aip_lookup(struct wg_softc *, sa_family_t, void *);