MSGSIZE
u_char resp[MSGSIZE], md[EVP_MAX_MD_SIZE];
(void)memcpy(resp, h->response, (size_t)MSGSIZE);
if (h->req_len + 2 + len > MSGSIZE) {
rv = recvfrom(h->fd, h->response, (size_t)MSGSIZE,
unsigned char request[MSGSIZE]; /* Request to send */
unsigned char response[MSGSIZE]; /* Response received */