diff --git a/programs/ssl/dtls_server.c b/programs/ssl/dtls_server.c
index 10d82ba..6f8c841 100644
--- a/programs/ssl/dtls_server.c
+++ b/programs/ssl/dtls_server.c
@@ -36,14 +36,14 @@
     !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_RSA_C) ||      \
     !defined(MBEDTLS_PEM_PARSE_C) || !defined(MBEDTLS_TIMING_C)
 
-int main( void )
+int main(void)
 {
-    printf( "MBEDTLS_SSL_SRV_C and/or MBEDTLS_SSL_PROTO_DTLS and/or "
-            "MBEDTLS_SSL_COOKIE_C and/or MBEDTLS_NET_C and/or "
-            "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or "
-            "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_RSA_C and/or "
-            "MBEDTLS_PEM_PARSE_C and/or MBEDTLS_TIMING_C not defined.\n" );
-    mbedtls_exit( 0 );
+    printf("MBEDTLS_SSL_SRV_C and/or MBEDTLS_SSL_PROTO_DTLS and/or "
+           "MBEDTLS_SSL_COOKIE_C and/or MBEDTLS_NET_C and/or "
+           "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or "
+           "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_RSA_C and/or "
+           "MBEDTLS_PEM_PARSE_C and/or MBEDTLS_TIMING_C not defined.\n");
+    mbedtls_exit(0);
 }
 #else
 
@@ -75,17 +75,17 @@
 #define DEBUG_LEVEL 0
 
 
-static void my_debug( void *ctx, int level,
-                      const char *file, int line,
-                      const char *str )
+static void my_debug(void *ctx, int level,
+                     const char *file, int line,
+                     const char *str)
 {
     ((void) level);
 
-    mbedtls_fprintf( (FILE *) ctx, "%s:%04d: %s", file, line, str );
-    fflush(  (FILE *) ctx  );
+    mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str);
+    fflush((FILE *) ctx);
 }
 
-int main( void )
+int main(void)
 {
     int ret, len;
     mbedtls_net_context listen_fd, client_fd;
@@ -106,274 +106,265 @@
     mbedtls_ssl_cache_context cache;
 #endif
 
-    mbedtls_net_init( &listen_fd );
-    mbedtls_net_init( &client_fd );
-    mbedtls_ssl_init( &ssl );
-    mbedtls_ssl_config_init( &conf );
-    mbedtls_ssl_cookie_init( &cookie_ctx );
+    mbedtls_net_init(&listen_fd);
+    mbedtls_net_init(&client_fd);
+    mbedtls_ssl_init(&ssl);
+    mbedtls_ssl_config_init(&conf);
+    mbedtls_ssl_cookie_init(&cookie_ctx);
 #if defined(MBEDTLS_SSL_CACHE_C)
-    mbedtls_ssl_cache_init( &cache );
+    mbedtls_ssl_cache_init(&cache);
 #endif
-    mbedtls_x509_crt_init( &srvcert );
-    mbedtls_pk_init( &pkey );
-    mbedtls_entropy_init( &entropy );
-    mbedtls_ctr_drbg_init( &ctr_drbg );
+    mbedtls_x509_crt_init(&srvcert);
+    mbedtls_pk_init(&pkey);
+    mbedtls_entropy_init(&entropy);
+    mbedtls_ctr_drbg_init(&ctr_drbg);
 
 #if defined(MBEDTLS_DEBUG_C)
-    mbedtls_debug_set_threshold( DEBUG_LEVEL );
+    mbedtls_debug_set_threshold(DEBUG_LEVEL);
 #endif
 
     /*
      * 1. Seed the RNG
      */
-    printf( "  . Seeding the random number generator..." );
-    fflush( stdout );
+    printf("  . Seeding the random number generator...");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
-                               (const unsigned char *) pers,
-                               strlen( pers ) ) ) != 0 )
-    {
-        printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret );
+    if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
+                                     (const unsigned char *) pers,
+                                     strlen(pers))) != 0) {
+        printf(" failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret);
         goto exit;
     }
 
-    printf( " ok\n" );
+    printf(" ok\n");
 
     /*
      * 2. Load the certificates and private RSA key
      */
-    printf( "\n  . Loading the server cert. and key..." );
-    fflush( stdout );
+    printf("\n  . Loading the server cert. and key...");
+    fflush(stdout);
 
     /*
      * This demonstration program uses embedded test certificates.
      * Instead, you may want to use mbedtls_x509_crt_parse_file() to read the
      * server and CA certificates, as well as mbedtls_pk_parse_keyfile().
      */
-    ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt,
-                          mbedtls_test_srv_crt_len );
-    if( ret != 0 )
-    {
-        printf( " failed\n  !  mbedtls_x509_crt_parse returned %d\n\n", ret );
+    ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_srv_crt,
+                                 mbedtls_test_srv_crt_len);
+    if (ret != 0) {
+        printf(" failed\n  !  mbedtls_x509_crt_parse returned %d\n\n", ret);
         goto exit;
     }
 
-    ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem,
-                          mbedtls_test_cas_pem_len );
-    if( ret != 0 )
-    {
-        printf( " failed\n  !  mbedtls_x509_crt_parse returned %d\n\n", ret );
+    ret = mbedtls_x509_crt_parse(&srvcert, (const unsigned char *) mbedtls_test_cas_pem,
+                                 mbedtls_test_cas_pem_len);
+    if (ret != 0) {
+        printf(" failed\n  !  mbedtls_x509_crt_parse returned %d\n\n", ret);
         goto exit;
     }
 
-    ret =  mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key,
-                         mbedtls_test_srv_key_len, NULL, 0, mbedtls_ctr_drbg_random, &ctr_drbg );
-    if( ret != 0 )
-    {
-        printf( " failed\n  !  mbedtls_pk_parse_key returned %d\n\n", ret );
+    ret =  mbedtls_pk_parse_key(&pkey,
+                                (const unsigned char *) mbedtls_test_srv_key,
+                                mbedtls_test_srv_key_len,
+                                NULL,
+                                0,
+                                mbedtls_ctr_drbg_random,
+                                &ctr_drbg);
+    if (ret != 0) {
+        printf(" failed\n  !  mbedtls_pk_parse_key returned %d\n\n", ret);
         goto exit;
     }
 
-    printf( " ok\n" );
+    printf(" ok\n");
 
     /*
      * 3. Setup the "listening" UDP socket
      */
-    printf( "  . Bind on udp/*/4433 ..." );
-    fflush( stdout );
+    printf("  . Bind on udp/*/4433 ...");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_net_bind( &listen_fd, BIND_IP, "4433", MBEDTLS_NET_PROTO_UDP ) ) != 0 )
-    {
-        printf( " failed\n  ! mbedtls_net_bind returned %d\n\n", ret );
+    if ((ret = mbedtls_net_bind(&listen_fd, BIND_IP, "4433", MBEDTLS_NET_PROTO_UDP)) != 0) {
+        printf(" failed\n  ! mbedtls_net_bind returned %d\n\n", ret);
         goto exit;
     }
 
-    printf( " ok\n" );
+    printf(" ok\n");
 
     /*
      * 4. Setup stuff
      */
-    printf( "  . Setting up the DTLS data..." );
-    fflush( stdout );
+    printf("  . Setting up the DTLS data...");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_ssl_config_defaults( &conf,
-                    MBEDTLS_SSL_IS_SERVER,
-                    MBEDTLS_SSL_TRANSPORT_DATAGRAM,
-                    MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n", ret );
+    if ((ret = mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_SERVER,
+                                           MBEDTLS_SSL_TRANSPORT_DATAGRAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
         goto exit;
     }
 
-    mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
-    mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
-    mbedtls_ssl_conf_read_timeout( &conf, READ_TIMEOUT_MS );
+    mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
+    mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
+    mbedtls_ssl_conf_read_timeout(&conf, READ_TIMEOUT_MS);
 
 #if defined(MBEDTLS_SSL_CACHE_C)
-    mbedtls_ssl_conf_session_cache( &conf, &cache,
+    mbedtls_ssl_conf_session_cache(&conf, &cache,
                                    mbedtls_ssl_cache_get,
-                                   mbedtls_ssl_cache_set );
+                                   mbedtls_ssl_cache_set);
 #endif
 
-    mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL );
-   if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 )
-    {
-        printf( " failed\n  ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret );
+    mbedtls_ssl_conf_ca_chain(&conf, srvcert.next, NULL);
+    if ((ret = mbedtls_ssl_conf_own_cert(&conf, &srvcert, &pkey)) != 0) {
+        printf(" failed\n  ! mbedtls_ssl_conf_own_cert returned %d\n\n", ret);
         goto exit;
     }
 
-    if( ( ret = mbedtls_ssl_cookie_setup( &cookie_ctx,
-                                  mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 )
-    {
-        printf( " failed\n  ! mbedtls_ssl_cookie_setup returned %d\n\n", ret );
+    if ((ret = mbedtls_ssl_cookie_setup(&cookie_ctx,
+                                        mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) {
+        printf(" failed\n  ! mbedtls_ssl_cookie_setup returned %d\n\n", ret);
         goto exit;
     }
 
-    mbedtls_ssl_conf_dtls_cookies( &conf, mbedtls_ssl_cookie_write, mbedtls_ssl_cookie_check,
-                               &cookie_ctx );
+    mbedtls_ssl_conf_dtls_cookies(&conf, mbedtls_ssl_cookie_write, mbedtls_ssl_cookie_check,
+                                  &cookie_ctx);
 
-    if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
-    {
-        printf( " failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret );
+    if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
+        printf(" failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret);
         goto exit;
     }
 
-    mbedtls_ssl_set_timer_cb( &ssl, &timer, mbedtls_timing_set_delay,
-                                            mbedtls_timing_get_delay );
+    mbedtls_ssl_set_timer_cb(&ssl, &timer, mbedtls_timing_set_delay,
+                             mbedtls_timing_get_delay);
 
-    printf( " ok\n" );
+    printf(" ok\n");
 
 reset:
 #ifdef MBEDTLS_ERROR_C
-    if( ret != 0 )
-    {
+    if (ret != 0) {
         char error_buf[100];
-        mbedtls_strerror( ret, error_buf, 100 );
-        printf("Last error was: %d - %s\n\n", ret, error_buf );
+        mbedtls_strerror(ret, error_buf, 100);
+        printf("Last error was: %d - %s\n\n", ret, error_buf);
     }
 #endif
 
-    mbedtls_net_free( &client_fd );
+    mbedtls_net_free(&client_fd);
 
-    mbedtls_ssl_session_reset( &ssl );
+    mbedtls_ssl_session_reset(&ssl);
 
     /*
      * 3. Wait until a client connects
      */
-    printf( "  . Waiting for a remote connection ..." );
-    fflush( stdout );
+    printf("  . Waiting for a remote connection ...");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd,
-                    client_ip, sizeof( client_ip ), &cliip_len ) ) != 0 )
-    {
-        printf( " failed\n  ! mbedtls_net_accept returned %d\n\n", ret );
+    if ((ret = mbedtls_net_accept(&listen_fd, &client_fd,
+                                  client_ip, sizeof(client_ip), &cliip_len)) != 0) {
+        printf(" failed\n  ! mbedtls_net_accept returned %d\n\n", ret);
         goto exit;
     }
 
     /* For HelloVerifyRequest cookies */
-    if( ( ret = mbedtls_ssl_set_client_transport_id( &ssl,
-                    client_ip, cliip_len ) ) != 0 )
-    {
-        printf( " failed\n  ! "
-                "mbedtls_ssl_set_client_transport_id() returned -0x%x\n\n", (unsigned int) -ret );
+    if ((ret = mbedtls_ssl_set_client_transport_id(&ssl,
+                                                   client_ip, cliip_len)) != 0) {
+        printf(" failed\n  ! "
+               "mbedtls_ssl_set_client_transport_id() returned -0x%x\n\n", (unsigned int) -ret);
         goto exit;
     }
 
-    mbedtls_ssl_set_bio( &ssl, &client_fd,
-                         mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout );
+    mbedtls_ssl_set_bio(&ssl, &client_fd,
+                        mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout);
 
-    printf( " ok\n" );
+    printf(" ok\n");
 
     /*
      * 5. Handshake
      */
-    printf( "  . Performing the DTLS handshake..." );
-    fflush( stdout );
+    printf("  . Performing the DTLS handshake...");
+    fflush(stdout);
 
-    do ret = mbedtls_ssl_handshake( &ssl );
-    while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
-           ret == MBEDTLS_ERR_SSL_WANT_WRITE );
+    do {
+        ret = mbedtls_ssl_handshake(&ssl);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+             ret == MBEDTLS_ERR_SSL_WANT_WRITE);
 
-    if( ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED )
-    {
-        printf( " hello verification requested\n" );
+    if (ret == MBEDTLS_ERR_SSL_HELLO_VERIFY_REQUIRED) {
+        printf(" hello verification requested\n");
         ret = 0;
         goto reset;
-    }
-    else if( ret != 0 )
-    {
-        printf( " failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n", (unsigned int) -ret );
+    } else if (ret != 0) {
+        printf(" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n", (unsigned int) -ret);
         goto reset;
     }
 
-    printf( " ok\n" );
+    printf(" ok\n");
 
     /*
      * 6. Read the echo Request
      */
-    printf( "  < Read from client:" );
-    fflush( stdout );
+    printf("  < Read from client:");
+    fflush(stdout);
 
-    len = sizeof( buf ) - 1;
-    memset( buf, 0, sizeof( buf ) );
+    len = sizeof(buf) - 1;
+    memset(buf, 0, sizeof(buf));
 
-    do ret = mbedtls_ssl_read( &ssl, buf, len );
-    while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
-           ret == MBEDTLS_ERR_SSL_WANT_WRITE );
+    do {
+        ret = mbedtls_ssl_read(&ssl, buf, len);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+             ret == MBEDTLS_ERR_SSL_WANT_WRITE);
 
-    if( ret <= 0 )
-    {
-        switch( ret )
-        {
+    if (ret <= 0) {
+        switch (ret) {
             case MBEDTLS_ERR_SSL_TIMEOUT:
-                printf( " timeout\n\n" );
+                printf(" timeout\n\n");
                 goto reset;
 
             case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
-                printf( " connection was closed gracefully\n" );
+                printf(" connection was closed gracefully\n");
                 ret = 0;
                 goto close_notify;
 
             default:
-                printf( " mbedtls_ssl_read returned -0x%x\n\n", (unsigned int) -ret );
+                printf(" mbedtls_ssl_read returned -0x%x\n\n", (unsigned int) -ret);
                 goto reset;
         }
     }
 
     len = ret;
-    printf( " %d bytes read\n\n%s\n\n", len, buf );
+    printf(" %d bytes read\n\n%s\n\n", len, buf);
 
     /*
      * 7. Write the 200 Response
      */
-    printf( "  > Write to client:" );
-    fflush( stdout );
+    printf("  > Write to client:");
+    fflush(stdout);
 
-    do ret = mbedtls_ssl_write( &ssl, buf, len );
-    while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
-           ret == MBEDTLS_ERR_SSL_WANT_WRITE );
+    do {
+        ret = mbedtls_ssl_write(&ssl, buf, len);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+             ret == MBEDTLS_ERR_SSL_WANT_WRITE);
 
-    if( ret < 0 )
-    {
-        printf( " failed\n  ! mbedtls_ssl_write returned %d\n\n", ret );
+    if (ret < 0) {
+        printf(" failed\n  ! mbedtls_ssl_write returned %d\n\n", ret);
         goto exit;
     }
 
     len = ret;
-    printf( " %d bytes written\n\n%s\n\n", len, buf );
+    printf(" %d bytes written\n\n%s\n\n", len, buf);
 
     /*
      * 8. Done, cleanly close the connection
      */
 close_notify:
-    printf( "  . Closing the connection..." );
+    printf("  . Closing the connection...");
 
     /* No error checking, the connection might be closed already */
-    do ret = mbedtls_ssl_close_notify( &ssl );
-    while( ret == MBEDTLS_ERR_SSL_WANT_WRITE );
+    do {
+        ret = mbedtls_ssl_close_notify(&ssl);
+    } while (ret == MBEDTLS_ERR_SSL_WANT_WRITE);
     ret = 0;
 
-    printf( " done\n" );
+    printf(" done\n");
 
     goto reset;
 
@@ -383,33 +374,33 @@
 exit:
 
 #ifdef MBEDTLS_ERROR_C
-    if( ret != 0 )
-    {
+    if (ret != 0) {
         char error_buf[100];
-        mbedtls_strerror( ret, error_buf, 100 );
-        printf( "Last error was: %d - %s\n\n", ret, error_buf );
+        mbedtls_strerror(ret, error_buf, 100);
+        printf("Last error was: %d - %s\n\n", ret, error_buf);
     }
 #endif
 
-    mbedtls_net_free( &client_fd );
-    mbedtls_net_free( &listen_fd );
+    mbedtls_net_free(&client_fd);
+    mbedtls_net_free(&listen_fd);
 
-    mbedtls_x509_crt_free( &srvcert );
-    mbedtls_pk_free( &pkey );
-    mbedtls_ssl_free( &ssl );
-    mbedtls_ssl_config_free( &conf );
-    mbedtls_ssl_cookie_free( &cookie_ctx );
+    mbedtls_x509_crt_free(&srvcert);
+    mbedtls_pk_free(&pkey);
+    mbedtls_ssl_free(&ssl);
+    mbedtls_ssl_config_free(&conf);
+    mbedtls_ssl_cookie_free(&cookie_ctx);
 #if defined(MBEDTLS_SSL_CACHE_C)
-    mbedtls_ssl_cache_free( &cache );
+    mbedtls_ssl_cache_free(&cache);
 #endif
-    mbedtls_ctr_drbg_free( &ctr_drbg );
-    mbedtls_entropy_free( &entropy );
+    mbedtls_ctr_drbg_free(&ctr_drbg);
+    mbedtls_entropy_free(&entropy);
 
     /* Shell can not handle large exit numbers -> 1 for errors */
-    if( ret < 0 )
+    if (ret < 0) {
         ret = 1;
+    }
 
-    mbedtls_exit( ret );
+    mbedtls_exit(ret);
 }
 #endif /* MBEDTLS_SSL_SRV_C && MBEDTLS_SSL_PROTO_DTLS &&
           MBEDTLS_SSL_COOKIE_C && MBEDTLS_NET_C && MBEDTLS_ENTROPY_C &&