size_t rsplen = sizeof(buf);  

            coap_packet_t rsppkt;  

#ifdef MICROCOAP_DEBUG  

            printf("Dump Packet: \r\n");  

            coap_dumpPacket(&pkt);  

#endif  

            coap_handle_req(&scratch_buf, &pkt, &rsppkt);  

            if (0 != (rc = coap_build(buf, &rsplen, &rsppkt)))  

            {  

                 printf("coap_build failed rc=%d\n", rc);  

            }  

            else  

            {  

#ifdef MICROCOAP_DEBUG  

                printf("--------------------\r\n");  

                printf("Sending Buffer: \r\n");  

                coap_dump(buf, rsplen, true);  

                printf("\r\n");  

#endif  

#ifdef MICROCOAP_DEBUG  

                coap_dumpPacket(&rsppkt);  

#endif  

                sendto(fd, buf, rsplen, 0, (struct sockaddr *)&cliaddr, sizeof(cliaddr));  

            }  

        }  

    }  

}