85     int ret, len;  in main()  local
119     if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,  in main()
123         mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret );  in main()
135     ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,  in main()
137     if( ret < 0 )  in main()
139         mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n", -ret );  in main()
143     mbedtls_printf( " ok (%d skipped)\n", ret );  in main()
151     if( ( ret = mbedtls_net_connect( &server_fd, SERVER_ADDR,  in main()
154         mbedtls_printf( " failed\n  ! mbedtls_net_connect returned %d\n\n", ret );  in main()
166     if( ( ret = mbedtls_ssl_config_defaults( &conf,  in main()
171         mbedtls_printf( " failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n", ret );  in main()
183     if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )  in main()
185         mbedtls_printf( " failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret );  in main()
189     if( ( ret = mbedtls_ssl_set_hostname( &ssl, SERVER_NAME ) ) != 0 )  in main()
191         mbedtls_printf( " failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n", ret );  in main()
209     do ret = mbedtls_ssl_handshake( &ssl );  in main()
210     while( ret == MBEDTLS_ERR_SSL_WANT_READ ||  in main()
211            ret == MBEDTLS_ERR_SSL_WANT_WRITE );  in main()
213     if( ret != 0 )  in main()
215         mbedtls_printf( " failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n", -ret );  in main()
251     do ret = mbedtls_ssl_write( &ssl, (unsigned char *) MESSAGE, len );  in main()
252     while( ret == MBEDTLS_ERR_SSL_WANT_READ ||  in main()
253            ret == MBEDTLS_ERR_SSL_WANT_WRITE );  in main()
255     if( ret < 0 )  in main()
257         mbedtls_printf( " failed\n  ! mbedtls_ssl_write returned %d\n\n", ret );  in main()
261     len = ret;  in main()
273     do ret = mbedtls_ssl_read( &ssl, buf, len );  in main()
274     while( ret == MBEDTLS_ERR_SSL_WANT_READ ||  in main()
275            ret == MBEDTLS_ERR_SSL_WANT_WRITE );  in main()
277     if( ret <= 0 )  in main()
279         switch( ret )  in main()
289                 ret = 0;  in main()
293                 mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n\n", -ret );  in main()
298     len = ret;  in main()
308     do ret = mbedtls_ssl_close_notify( &ssl );  in main()
309     while( ret == MBEDTLS_ERR_SSL_WANT_WRITE );  in main()
310     ret = 0;  in main()
320     if( ret != 0 )  in main()
323         mbedtls_strerror( ret, error_buf, 100 );  in main()
324         mbedtls_printf( "Last error was: %d - %s\n\n", ret, error_buf );  in main()
342     if( ret < 0 )  in main()
343         ret = 1;  in main()
345     return( ret );  in main()