}
static bool try_mac(node_t *n, const vpn_packet_t *inpkt) {
+ if(experimental && OPTION_VERSION(n->options) >= 2)
+ return sptps_verify_datagram(&n->sptps, (char *)inpkt->data - 4, inpkt->len);
+
if(!digest_active(&n->indigest) || inpkt->len < sizeof inpkt->seqno + digest_length(&n->indigest))
return false;