silc_hmac_alloc((char *)silc_hmac_get_name(hmac), NULL, &conn->hmac_send);
silc_hmac_alloc((char *)silc_hmac_get_name(hmac), NULL, &conn->hmac_receive);
silc_hmac_alloc((char *)silc_hmac_get_name(hmac), NULL, &conn->hmac_send);
silc_hmac_alloc((char *)silc_hmac_get_name(hmac), NULL, &conn->hmac_receive);