wg_peer_lookup
if ((peer = wg_peer_lookup(sc, public)) == NULL)
if ((peer = wg_peer_lookup(sc, public)) != NULL)
if ((peer = wg_peer_lookup(sc, peer_o.p_public)) == NULL) {
wg_peer_lookup(struct wg_softc *, const uint8_t[WG_KEY_SIZE]);