80     int ret, len;  in main()  local
117     if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,  in main()
120         mbedtls_printf(" failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret);  in main()
137     ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt,  in main()
139     if (ret != 0) {  in main()
140         mbedtls_printf(" failed\n  !  mbedtls_x509_crt_parse returned %d\n\n", ret);  in main()
144     ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem,  in main()
146     if (ret != 0) {  in main()
147         mbedtls_printf(" failed\n  !  mbedtls_x509_crt_parse returned %d\n\n", ret);  in main()
151     ret =  mbedtls_pk_parse_key(&pkey, (const unsigned char *) mbedtls_test_srv_key,  in main()
154     if (ret != 0) {  in main()
155         mbedtls_printf(" failed\n  !  mbedtls_pk_parse_key returned %d\n\n", ret);  in main()
167     if ((ret = mbedtls_net_bind(&listen_fd, NULL, "4433", MBEDTLS_NET_PROTO_TCP)) != 0) {  in main()
168         mbedtls_printf(" failed\n  ! mbedtls_net_bind returned %d\n\n", ret);  in main()
180     if ((ret = mbedtls_ssl_config_defaults(&conf,  in main()
184         mbedtls_printf(" failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n", ret);  in main()
198     if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) {  in main()
199         mbedtls_printf(" failed\n  ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);  in main()
203     if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {  in main()
204         mbedtls_printf(" failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret);  in main()
212     if (ret != 0) {  in main()
214         mbedtls_strerror(ret, error_buf, 100);  in main()
215         mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);  in main()
229     if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,  in main()
231         mbedtls_printf(" failed\n  ! mbedtls_net_accept returned %d\n\n", ret);  in main()
245     while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {  in main()
246         if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {  in main()
247             mbedtls_printf(" failed\n  ! mbedtls_ssl_handshake returned %d\n\n", ret);  in main()
263         ret = mbedtls_ssl_read(&ssl, buf, len);  in main()
265         if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {  in main()
269         if (ret <= 0) {  in main()
270             switch (ret) {  in main()
280                     mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n", (unsigned int) -ret);  in main()
287         len = ret;  in main()
290         if (ret > 0) {  in main()
304     while ((ret = mbedtls_ssl_write(&ssl, buf, len)) <= 0) {  in main()
305         if (ret == MBEDTLS_ERR_NET_CONN_RESET) {  in main()
310         if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) {  in main()
311             mbedtls_printf(" failed\n  ! mbedtls_ssl_write returned %d\n\n", ret);  in main()
316     len = ret;  in main()
321     while ((ret = mbedtls_ssl_close_notify(&ssl)) < 0) {  in main()
322         if (ret != MBEDTLS_ERR_SSL_WANT_READ &&  in main()
323             ret != MBEDTLS_ERR_SSL_WANT_WRITE) {  in main()
324             mbedtls_printf(" failed\n  ! mbedtls_ssl_close_notify returned %d\n\n", ret);  in main()
331     ret = 0;  in main()
337     if (ret != 0) {  in main()
339         mbedtls_strerror(ret, error_buf, 100);  in main()
340         mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);  in main()
357     mbedtls_exit(ret);  in main()