diff --git a/programs/ssl/dtls_client.c b/programs/ssl/dtls_client.c
index 2bebb0d..cf8f094 100644
--- a/programs/ssl/dtls_client.c
+++ b/programs/ssl/dtls_client.c
@@ -20,75 +20,73 @@
 #include "mbedtls/build_info.h"
 
 #if defined(MBEDTLS_PLATFORM_C)
-#include "mbedtls/platform.h"
+#    include "mbedtls/platform.h"
 #else
-#include <stdio.h>
-#include <stdlib.h>
-#define mbedtls_printf     printf
-#define mbedtls_fprintf    fprintf
-#define mbedtls_exit            exit
-#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
-#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#    include <stdio.h>
+#    include <stdlib.h>
+#    define mbedtls_printf       printf
+#    define mbedtls_fprintf      fprintf
+#    define mbedtls_exit         exit
+#    define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
+#    define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
 #endif
 
-#if !defined(MBEDTLS_SSL_CLI_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) ||    \
-    !defined(MBEDTLS_NET_C)  || !defined(MBEDTLS_TIMING_C) ||             \
-    !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) ||        \
-    !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_RSA_C) ||      \
+#if !defined(MBEDTLS_SSL_CLI_C) || !defined(MBEDTLS_SSL_PROTO_DTLS) || \
+    !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_TIMING_C) ||           \
+    !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) ||     \
+    !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_RSA_C) ||   \
     !defined(MBEDTLS_PEM_PARSE_C)
-int main( void )
+int main(void)
 {
-    mbedtls_printf( "MBEDTLS_SSL_CLI_C and/or MBEDTLS_SSL_PROTO_DTLS and/or "
-            "MBEDTLS_NET_C and/or MBEDTLS_TIMING_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 not defined.\n" );
-    mbedtls_exit( 0 );
+    mbedtls_printf("MBEDTLS_SSL_CLI_C and/or MBEDTLS_SSL_PROTO_DTLS and/or "
+                   "MBEDTLS_NET_C and/or MBEDTLS_TIMING_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 not defined.\n");
+    mbedtls_exit(0);
 }
 #else
 
-#include <string.h>
+#    include <string.h>
 
-#include "mbedtls/net_sockets.h"
-#include "mbedtls/debug.h"
-#include "mbedtls/ssl.h"
-#include "mbedtls/entropy.h"
-#include "mbedtls/ctr_drbg.h"
-#include "mbedtls/error.h"
-#include "mbedtls/timing.h"
-#include "test/certs.h"
+#    include "mbedtls/net_sockets.h"
+#    include "mbedtls/debug.h"
+#    include "mbedtls/ssl.h"
+#    include "mbedtls/entropy.h"
+#    include "mbedtls/ctr_drbg.h"
+#    include "mbedtls/error.h"
+#    include "mbedtls/timing.h"
+#    include "test/certs.h"
 
 /* Uncomment out the following line to default to IPv4 and disable IPv6 */
 //#define FORCE_IPV4
 
-#define SERVER_PORT "4433"
-#define SERVER_NAME "localhost"
+#    define SERVER_PORT "4433"
+#    define SERVER_NAME "localhost"
 
-#ifdef FORCE_IPV4
-#define SERVER_ADDR "127.0.0.1"     /* Forces IPv4 */
-#else
-#define SERVER_ADDR "::1"
-#endif
+#    ifdef FORCE_IPV4
+#        define SERVER_ADDR "127.0.0.1" /* Forces IPv4 */
+#    else
+#        define SERVER_ADDR "::1"
+#    endif
 
-#define MESSAGE     "Echo this"
+#    define MESSAGE "Echo this"
 
-#define READ_TIMEOUT_MS 1000
-#define MAX_RETRY       5
+#    define READ_TIMEOUT_MS 1000
+#    define MAX_RETRY       5
 
-#define DEBUG_LEVEL 0
+#    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);
+    ((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( int argc, char *argv[] )
+int main(int argc, char *argv[])
 {
     int ret, len;
     mbedtls_net_context server_fd;
@@ -104,259 +102,257 @@
     mbedtls_x509_crt cacert;
     mbedtls_timing_delay_context timer;
 
-    ((void) argc);
-    ((void) argv);
+    ((void)argc);
+    ((void)argv);
 
-#if defined(MBEDTLS_DEBUG_C)
-    mbedtls_debug_set_threshold( DEBUG_LEVEL );
-#endif
+#    if defined(MBEDTLS_DEBUG_C)
+    mbedtls_debug_set_threshold(DEBUG_LEVEL);
+#    endif
 
     /*
      * 0. Initialize the RNG and the session data
      */
-    mbedtls_net_init( &server_fd );
-    mbedtls_ssl_init( &ssl );
-    mbedtls_ssl_config_init( &conf );
-    mbedtls_x509_crt_init( &cacert );
-    mbedtls_ctr_drbg_init( &ctr_drbg );
+    mbedtls_net_init(&server_fd);
+    mbedtls_ssl_init(&ssl);
+    mbedtls_ssl_config_init(&conf);
+    mbedtls_x509_crt_init(&cacert);
+    mbedtls_ctr_drbg_init(&ctr_drbg);
 
-    mbedtls_printf( "\n  . Seeding the random number generator..." );
-    fflush( stdout );
+    mbedtls_printf("\n  . Seeding the random number generator...");
+    fflush(stdout);
 
-    mbedtls_entropy_init( &entropy );
-    if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy,
-                               (const unsigned char *) pers,
-                               strlen( pers ) ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret );
+    mbedtls_entropy_init(&entropy);
+    if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy,
+                                     (const unsigned char *)pers,
+                                     strlen(pers))) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret);
         goto exit;
     }
 
-    mbedtls_printf( " ok\n" );
+    mbedtls_printf(" ok\n");
 
     /*
      * 0. Load certificates
      */
-    mbedtls_printf( "  . Loading the CA root certificate ..." );
-    fflush( stdout );
+    mbedtls_printf("  . Loading the CA root certificate ...");
+    fflush(stdout);
 
-    ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_cas_pem,
-                          mbedtls_test_cas_pem_len );
-    if( ret < 0 )
-    {
-        mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n", (unsigned int) -ret );
+    ret = mbedtls_x509_crt_parse(&cacert,
+                                 (const unsigned char *)mbedtls_test_cas_pem,
+                                 mbedtls_test_cas_pem_len);
+    if (ret < 0) {
+        mbedtls_printf(
+            " failed\n  !  mbedtls_x509_crt_parse returned -0x%x\n\n",
+            (unsigned int)-ret);
         goto exit;
     }
 
-    mbedtls_printf( " ok (%d skipped)\n", ret );
+    mbedtls_printf(" ok (%d skipped)\n", ret);
 
     /*
      * 1. Start the connection
      */
-    mbedtls_printf( "  . Connecting to udp/%s/%s...", SERVER_NAME, SERVER_PORT );
-    fflush( stdout );
+    mbedtls_printf("  . Connecting to udp/%s/%s...", SERVER_NAME, SERVER_PORT);
+    fflush(stdout);
 
-    if( ( ret = mbedtls_net_connect( &server_fd, SERVER_ADDR,
-                                         SERVER_PORT, MBEDTLS_NET_PROTO_UDP ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_net_connect returned %d\n\n", ret );
+    if ((ret = mbedtls_net_connect(&server_fd, SERVER_ADDR, SERVER_PORT,
+                                   MBEDTLS_NET_PROTO_UDP)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_net_connect returned %d\n\n", ret);
         goto exit;
     }
 
-    mbedtls_printf( " ok\n" );
+    mbedtls_printf(" ok\n");
 
     /*
      * 2. Setup stuff
      */
-    mbedtls_printf( "  . Setting up the DTLS structure..." );
-    fflush( stdout );
+    mbedtls_printf("  . Setting up the DTLS structure...");
+    fflush(stdout);
 
-    if( ( ret = mbedtls_ssl_config_defaults( &conf,
-                   MBEDTLS_SSL_IS_CLIENT,
-                   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_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_DATAGRAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
+        mbedtls_printf(
+            " failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n", ret);
         goto exit;
     }
 
     /* OPTIONAL is usually a bad choice for security, but makes interop easier
      * in this simplified example, in which the ca chain is hardcoded.
      * Production code should set a proper ca chain and use REQUIRED. */
-    mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_OPTIONAL );
-    mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
-    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_authmode(&conf, MBEDTLS_SSL_VERIFY_OPTIONAL);
+    mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
+    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( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret );
+    if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_setup returned %d\n\n", ret);
         goto exit;
     }
 
-    if( ( ret = mbedtls_ssl_set_hostname( &ssl, SERVER_NAME ) ) != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
+    if ((ret = mbedtls_ssl_set_hostname(&ssl, SERVER_NAME)) != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n",
+                       ret);
         goto exit;
     }
 
-    mbedtls_ssl_set_bio( &ssl, &server_fd,
-                         mbedtls_net_send, mbedtls_net_recv, mbedtls_net_recv_timeout );
+    mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv,
+                        mbedtls_net_recv_timeout);
 
-    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);
 
-    mbedtls_printf( " ok\n" );
+    mbedtls_printf(" ok\n");
 
     /*
      * 4. Handshake
      */
-    mbedtls_printf( "  . Performing the DTLS handshake..." );
-    fflush( stdout );
+    mbedtls_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 != 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n", (unsigned int) -ret );
+    if (ret != 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_handshake returned -0x%x\n\n",
+                       (unsigned int)-ret);
         goto exit;
     }
 
-    mbedtls_printf( " ok\n" );
+    mbedtls_printf(" ok\n");
 
     /*
      * 5. Verify the server certificate
      */
-    mbedtls_printf( "  . Verifying peer X.509 certificate..." );
+    mbedtls_printf("  . Verifying peer X.509 certificate...");
 
     /* In real life, we would have used MBEDTLS_SSL_VERIFY_REQUIRED so that the
      * handshake would not succeed if the peer's cert is bad.  Even if we used
      * MBEDTLS_SSL_VERIFY_OPTIONAL, we would bail out here if ret != 0 */
-    if( ( flags = mbedtls_ssl_get_verify_result( &ssl ) ) != 0 )
-    {
-#if !defined(MBEDTLS_X509_REMOVE_INFO)
+    if ((flags = mbedtls_ssl_get_verify_result(&ssl)) != 0) {
+#    if !defined(MBEDTLS_X509_REMOVE_INFO)
         char vrfy_buf[512];
-#endif
+#    endif
 
-        mbedtls_printf( " failed\n" );
+        mbedtls_printf(" failed\n");
 
-#if !defined(MBEDTLS_X509_REMOVE_INFO)
-        mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), "  ! ", flags );
+#    if !defined(MBEDTLS_X509_REMOVE_INFO)
+        mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), "  ! ", flags);
 
-        mbedtls_printf( "%s\n", vrfy_buf );
-#endif
-    }
-    else
-        mbedtls_printf( " ok\n" );
+        mbedtls_printf("%s\n", vrfy_buf);
+#    endif
+    } else
+        mbedtls_printf(" ok\n");
 
     /*
      * 6. Write the echo request
      */
 send_request:
-    mbedtls_printf( "  > Write to server:" );
-    fflush( stdout );
+    mbedtls_printf("  > Write to server:");
+    fflush(stdout);
 
-    len = sizeof( MESSAGE ) - 1;
+    len = sizeof(MESSAGE) - 1;
 
-    do ret = mbedtls_ssl_write( &ssl, (unsigned char *) MESSAGE, len );
-    while( ret == MBEDTLS_ERR_SSL_WANT_READ ||
-           ret == MBEDTLS_ERR_SSL_WANT_WRITE );
+    do
+        ret = mbedtls_ssl_write(&ssl, (unsigned char *)MESSAGE, len);
+    while (ret == MBEDTLS_ERR_SSL_WANT_READ ||
+           ret == MBEDTLS_ERR_SSL_WANT_WRITE);
 
-    if( ret < 0 )
-    {
-        mbedtls_printf( " failed\n  ! mbedtls_ssl_write returned %d\n\n", ret );
+    if (ret < 0) {
+        mbedtls_printf(" failed\n  ! mbedtls_ssl_write returned %d\n\n", ret);
         goto exit;
     }
 
     len = ret;
-    mbedtls_printf( " %d bytes written\n\n%s\n\n", len, MESSAGE );
+    mbedtls_printf(" %d bytes written\n\n%s\n\n", len, MESSAGE);
 
     /*
      * 7. Read the echo response
      */
-    mbedtls_printf( "  < Read from server:" );
-    fflush( stdout );
+    mbedtls_printf("  < Read from server:");
+    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:
-                mbedtls_printf( " timeout\n\n" );
-                if( retry_left-- > 0 )
+                mbedtls_printf(" timeout\n\n");
+                if (retry_left-- > 0)
                     goto send_request;
                 goto exit;
 
             case MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY:
-                mbedtls_printf( " connection was closed gracefully\n" );
+                mbedtls_printf(" connection was closed gracefully\n");
                 ret = 0;
                 goto close_notify;
 
             default:
-                mbedtls_printf( " mbedtls_ssl_read returned -0x%x\n\n", (unsigned int) -ret );
+                mbedtls_printf(" mbedtls_ssl_read returned -0x%x\n\n",
+                               (unsigned int)-ret);
                 goto exit;
         }
     }
 
     len = ret;
-    mbedtls_printf( " %d bytes read\n\n%s\n\n", len, buf );
+    mbedtls_printf(" %d bytes read\n\n%s\n\n", len, buf);
 
     /*
      * 8. Done, cleanly close the connection
      */
 close_notify:
-    mbedtls_printf( "  . Closing the connection..." );
+    mbedtls_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;
 
-    mbedtls_printf( " done\n" );
+    mbedtls_printf(" done\n");
 
     /*
      * 9. Final clean-ups and exit
      */
 exit:
 
-#ifdef MBEDTLS_ERROR_C
-    if( ret != 0 )
-    {
+#    ifdef MBEDTLS_ERROR_C
+    if (ret != 0) {
         char error_buf[100];
-        mbedtls_strerror( ret, error_buf, 100 );
-        mbedtls_printf( "Last error was: %d - %s\n\n", ret, error_buf );
+        mbedtls_strerror(ret, error_buf, 100);
+        mbedtls_printf("Last error was: %d - %s\n\n", ret, error_buf);
     }
-#endif
+#    endif
 
-    mbedtls_net_free( &server_fd );
+    mbedtls_net_free(&server_fd);
 
-    mbedtls_x509_crt_free( &cacert );
-    mbedtls_ssl_free( &ssl );
-    mbedtls_ssl_config_free( &conf );
-    mbedtls_ctr_drbg_free( &ctr_drbg );
-    mbedtls_entropy_free( &entropy );
+    mbedtls_x509_crt_free(&cacert);
+    mbedtls_ssl_free(&ssl);
+    mbedtls_ssl_config_free(&conf);
+    mbedtls_ctr_drbg_free(&ctr_drbg);
+    mbedtls_entropy_free(&entropy);
 
-#if defined(_WIN32)
-    mbedtls_printf( "  + Press Enter to exit this program.\n" );
-    fflush( stdout ); getchar();
-#endif
+#    if defined(_WIN32)
+    mbedtls_printf("  + Press Enter to exit this program.\n");
+    fflush(stdout);
+    getchar();
+#    endif
 
     /* 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_CLI_C && MBEDTLS_SSL_PROTO_DTLS && MBEDTLS_NET_C &&
-          MBEDTLD_TIMING_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&
+#endif /* MBEDTLS_SSL_CLI_C && MBEDTLS_SSL_PROTO_DTLS && MBEDTLS_NET_C && \
+          MBEDTLD_TIMING_C && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C &&  \
           MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_RSA_C && MBEDTLS_PEM_PARSE_C */