Apply clang formatting.

Executed with:
`find . -regextype posix-egrep -regex ".*\.([hc]|fmt|function)" | xargs -L1 clang-format-12 -i`

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c
index 65276e7..5f9766a 100644
--- a/programs/x509/cert_app.c
+++ b/programs/x509/cert_app.c
@@ -20,128 +20,125 @@
 #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_time            time
-#define mbedtls_time_t          time_t
-#define mbedtls_fprintf         fprintf
-#define mbedtls_printf          printf
-#define mbedtls_exit            exit
-#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
-#define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
+#    include <stdio.h>
+#    include <stdlib.h>
+#    define mbedtls_time         time
+#    define mbedtls_time_t       time_t
+#    define mbedtls_fprintf      fprintf
+#    define mbedtls_printf       printf
+#    define mbedtls_exit         exit
+#    define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
+#    define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
 #endif /* MBEDTLS_PLATFORM_C */
 
-#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||  \
-    !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \
-    !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) ||         \
-    !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) ||  \
+#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) ||     \
+    !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) ||    \
+    !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) ||            \
+    !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
     !defined(MBEDTLS_CTR_DRBG_C) || defined(MBEDTLS_X509_REMOVE_INFO)
-int main( void )
+int main(void)
 {
-    mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
-           "MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or "
-           "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
-           "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or "
-           "MBEDTLS_CTR_DRBG_C not defined and/or MBEDTLS_X509_REMOVE_INFO defined.\n");
-    mbedtls_exit( 0 );
+    mbedtls_printf(
+        "MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or "
+        "MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or "
+        "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or "
+        "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or "
+        "MBEDTLS_CTR_DRBG_C not defined and/or MBEDTLS_X509_REMOVE_INFO defined.\n");
+    mbedtls_exit(0);
 }
 #else
 
-#include "mbedtls/entropy.h"
-#include "mbedtls/ctr_drbg.h"
-#include "mbedtls/net_sockets.h"
-#include "mbedtls/ssl.h"
-#include "mbedtls/x509.h"
-#include "mbedtls/debug.h"
+#    include "mbedtls/entropy.h"
+#    include "mbedtls/ctr_drbg.h"
+#    include "mbedtls/net_sockets.h"
+#    include "mbedtls/ssl.h"
+#    include "mbedtls/x509.h"
+#    include "mbedtls/debug.h"
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#    include <stdio.h>
+#    include <stdlib.h>
+#    include <string.h>
 
-#define MODE_NONE               0
-#define MODE_FILE               1
-#define MODE_SSL                2
+#    define MODE_NONE 0
+#    define MODE_FILE 1
+#    define MODE_SSL  2
 
-#define DFL_MODE                MODE_NONE
-#define DFL_FILENAME            "cert.crt"
-#define DFL_CA_FILE             ""
-#define DFL_CRL_FILE            ""
-#define DFL_CA_PATH             ""
-#define DFL_SERVER_NAME         "localhost"
-#define DFL_SERVER_PORT         "4433"
-#define DFL_DEBUG_LEVEL         0
-#define DFL_PERMISSIVE          0
+#    define DFL_MODE        MODE_NONE
+#    define DFL_FILENAME    "cert.crt"
+#    define DFL_CA_FILE     ""
+#    define DFL_CRL_FILE    ""
+#    define DFL_CA_PATH     ""
+#    define DFL_SERVER_NAME "localhost"
+#    define DFL_SERVER_PORT "4433"
+#    define DFL_DEBUG_LEVEL 0
+#    define DFL_PERMISSIVE  0
 
-#define USAGE_IO \
-    "    ca_file=%%s          The single file containing the top-level CA(s) you fully trust\n" \
-    "                        default: \"\" (none)\n" \
-    "    crl_file=%%s         The single CRL file you want to use\n" \
-    "                        default: \"\" (none)\n" \
-    "    ca_path=%%s          The path containing the top-level CA(s) you fully trust\n" \
-    "                        default: \"\" (none) (overrides ca_file)\n"
+#    define USAGE_IO                                                                                \
+        "    ca_file=%%s          The single file containing the top-level CA(s) you fully trust\n" \
+        "                        default: \"\" (none)\n"                                            \
+        "    crl_file=%%s         The single CRL file you want to use\n"                            \
+        "                        default: \"\" (none)\n"                                            \
+        "    ca_path=%%s          The path containing the top-level CA(s) you fully trust\n"        \
+        "                        default: \"\" (none) (overrides ca_file)\n"
 
-#define USAGE \
-    "\n usage: cert_app param=<>...\n"                  \
-    "\n acceptable parameters:\n"                       \
-    "    mode=file|ssl       default: none\n"           \
-    "    filename=%%s         default: cert.crt\n"      \
-    USAGE_IO                                            \
-    "    server_name=%%s      default: localhost\n"     \
-    "    server_port=%%d      default: 4433\n"          \
-    "    debug_level=%%d      default: 0 (disabled)\n"  \
-    "    permissive=%%d       default: 0 (disabled)\n"  \
-    "\n"
-
+#    define USAGE                                               \
+        "\n usage: cert_app param=<>...\n"                      \
+        "\n acceptable parameters:\n"                           \
+        "    mode=file|ssl       default: none\n"               \
+        "    filename=%%s         default: cert.crt\n" USAGE_IO \
+        "    server_name=%%s      default: localhost\n"         \
+        "    server_port=%%d      default: 4433\n"              \
+        "    debug_level=%%d      default: 0 (disabled)\n"      \
+        "    permissive=%%d       default: 0 (disabled)\n"      \
+        "\n"
 
 /*
  * global options
  */
-struct options
-{
-    int mode;                   /* the mode to run the application in   */
-    const char *filename;       /* filename of the certificate file     */
-    const char *ca_file;        /* the file with the CA certificate(s)  */
-    const char *crl_file;       /* the file with the CRL to use         */
-    const char *ca_path;        /* the path with the CA certificate(s) reside */
-    const char *server_name;    /* hostname of the server (client only) */
-    const char *server_port;    /* port on which the ssl service runs   */
-    int debug_level;            /* level of debugging                   */
-    int permissive;             /* permissive parsing                   */
+struct options {
+    int mode; /* the mode to run the application in   */
+    const char *filename; /* filename of the certificate file     */
+    const char *ca_file; /* the file with the CA certificate(s)  */
+    const char *crl_file; /* the file with the CRL to use         */
+    const char *ca_path; /* the path with the CA certificate(s) reside */
+    const char *server_name; /* hostname of the server (client only) */
+    const char *server_port; /* port on which the ssl service runs   */
+    int debug_level; /* level of debugging                   */
+    int permissive; /* permissive parsing                   */
 } opt;
 
-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);
 }
 
-static int my_verify( void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags )
+static int
+my_verify(void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags)
 {
     char buf[1024];
-    ((void) data);
+    ((void)data);
 
-    mbedtls_printf( "\nVerify requested for (Depth %d):\n", depth );
-    mbedtls_x509_crt_info( buf, sizeof( buf ) - 1, "", crt );
-    mbedtls_printf( "%s", buf );
+    mbedtls_printf("\nVerify requested for (Depth %d):\n", depth);
+    mbedtls_x509_crt_info(buf, sizeof(buf) - 1, "", crt);
+    mbedtls_printf("%s", buf);
 
-    if ( ( *flags ) == 0 )
-        mbedtls_printf( "  This certificate has no flags\n" );
-    else
-    {
-        mbedtls_x509_crt_verify_info( buf, sizeof( buf ), "  ! ", *flags );
-        mbedtls_printf( "%s\n", buf );
+    if ((*flags) == 0)
+        mbedtls_printf("  This certificate has no flags\n");
+    else {
+        mbedtls_x509_crt_verify_info(buf, sizeof(buf), "  ! ", *flags);
+        mbedtls_printf("%s\n", buf);
     }
 
-    return 0 ;
+    return 0;
 }
 
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
 {
     int ret = 1;
     int exit_code = MBEDTLS_EXIT_FAILURE;
@@ -162,174 +159,164 @@
     /*
      * Set to sane values
      */
-    mbedtls_net_init( &server_fd );
-    mbedtls_ctr_drbg_init( &ctr_drbg );
-    mbedtls_ssl_init( &ssl );
-    mbedtls_ssl_config_init( &conf );
-    mbedtls_x509_crt_init( &cacert );
-#if defined(MBEDTLS_X509_CRL_PARSE_C)
-    mbedtls_x509_crl_init( &cacrl );
-#else
+    mbedtls_net_init(&server_fd);
+    mbedtls_ctr_drbg_init(&ctr_drbg);
+    mbedtls_ssl_init(&ssl);
+    mbedtls_ssl_config_init(&conf);
+    mbedtls_x509_crt_init(&cacert);
+#    if defined(MBEDTLS_X509_CRL_PARSE_C)
+    mbedtls_x509_crl_init(&cacrl);
+#    else
     /* Zeroize structure as CRL parsing is not supported and we have to pass
        it to the verify function */
-    memset( &cacrl, 0, sizeof(mbedtls_x509_crl) );
-#endif
+    memset(&cacrl, 0, sizeof(mbedtls_x509_crl));
+#    endif
 
-    if( argc == 0 )
-    {
-    usage:
-        mbedtls_printf( USAGE );
+    if (argc == 0) {
+usage:
+        mbedtls_printf(USAGE);
         goto exit;
     }
 
-    opt.mode                = DFL_MODE;
-    opt.filename            = DFL_FILENAME;
-    opt.ca_file             = DFL_CA_FILE;
-    opt.crl_file            = DFL_CRL_FILE;
-    opt.ca_path             = DFL_CA_PATH;
-    opt.server_name         = DFL_SERVER_NAME;
-    opt.server_port         = DFL_SERVER_PORT;
-    opt.debug_level         = DFL_DEBUG_LEVEL;
-    opt.permissive          = DFL_PERMISSIVE;
+    opt.mode = DFL_MODE;
+    opt.filename = DFL_FILENAME;
+    opt.ca_file = DFL_CA_FILE;
+    opt.crl_file = DFL_CRL_FILE;
+    opt.ca_path = DFL_CA_PATH;
+    opt.server_name = DFL_SERVER_NAME;
+    opt.server_port = DFL_SERVER_PORT;
+    opt.debug_level = DFL_DEBUG_LEVEL;
+    opt.permissive = DFL_PERMISSIVE;
 
-    for( i = 1; i < argc; i++ )
-    {
+    for (i = 1; i < argc; i++) {
         p = argv[i];
-        if( ( q = strchr( p, '=' ) ) == NULL )
+        if ((q = strchr(p, '=')) == NULL)
             goto usage;
         *q++ = '\0';
 
-        for( j = 0; p + j < q; j++ )
-        {
-            if( argv[i][j] >= 'A' && argv[i][j] <= 'Z' )
+        for (j = 0; p + j < q; j++) {
+            if (argv[i][j] >= 'A' && argv[i][j] <= 'Z')
                 argv[i][j] |= 0x20;
         }
 
-        if( strcmp( p, "mode" ) == 0 )
-        {
-            if( strcmp( q, "file" ) == 0 )
+        if (strcmp(p, "mode") == 0) {
+            if (strcmp(q, "file") == 0)
                 opt.mode = MODE_FILE;
-            else if( strcmp( q, "ssl" ) == 0 )
+            else if (strcmp(q, "ssl") == 0)
                 opt.mode = MODE_SSL;
             else
                 goto usage;
-        }
-        else if( strcmp( p, "filename" ) == 0 )
+        } else if (strcmp(p, "filename") == 0)
             opt.filename = q;
-        else if( strcmp( p, "ca_file" ) == 0 )
+        else if (strcmp(p, "ca_file") == 0)
             opt.ca_file = q;
-        else if( strcmp( p, "crl_file" ) == 0 )
+        else if (strcmp(p, "crl_file") == 0)
             opt.crl_file = q;
-        else if( strcmp( p, "ca_path" ) == 0 )
+        else if (strcmp(p, "ca_path") == 0)
             opt.ca_path = q;
-        else if( strcmp( p, "server_name" ) == 0 )
+        else if (strcmp(p, "server_name") == 0)
             opt.server_name = q;
-        else if( strcmp( p, "server_port" ) == 0 )
+        else if (strcmp(p, "server_port") == 0)
             opt.server_port = q;
-        else if( strcmp( p, "debug_level" ) == 0 )
-        {
-            opt.debug_level = atoi( q );
-            if( opt.debug_level < 0 || opt.debug_level > 65535 )
+        else if (strcmp(p, "debug_level") == 0) {
+            opt.debug_level = atoi(q);
+            if (opt.debug_level < 0 || opt.debug_level > 65535)
                 goto usage;
-        }
-        else if( strcmp( p, "permissive" ) == 0 )
-        {
-            opt.permissive = atoi( q );
-            if( opt.permissive < 0 || opt.permissive > 1 )
+        } else if (strcmp(p, "permissive") == 0) {
+            opt.permissive = atoi(q);
+            if (opt.permissive < 0 || opt.permissive > 1)
                 goto usage;
-        }
-        else
+        } else
             goto usage;
     }
 
     /*
      * 1.1. Load the trusted CA
      */
-    mbedtls_printf( "  . Loading the CA root certificate ..." );
-    fflush( stdout );
+    mbedtls_printf("  . Loading the CA root certificate ...");
+    fflush(stdout);
 
-    if( strlen( opt.ca_path ) )
-    {
-        if( ( ret = mbedtls_x509_crt_parse_path( &cacert, opt.ca_path ) ) < 0 )
-        {
-            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_path returned -0x%x\n\n", (unsigned int) -ret );
+    if (strlen(opt.ca_path)) {
+        if ((ret = mbedtls_x509_crt_parse_path(&cacert, opt.ca_path)) < 0) {
+            mbedtls_printf(
+                " failed\n  !  mbedtls_x509_crt_parse_path returned -0x%x\n\n",
+                (unsigned int)-ret);
             goto exit;
         }
 
         verify = 1;
-    }
-    else if( strlen( opt.ca_file ) )
-    {
-        if( ( ret = mbedtls_x509_crt_parse_file( &cacert, opt.ca_file ) ) < 0 )
-        {
-            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_file returned -0x%x\n\n", (unsigned int) -ret );
+    } else if (strlen(opt.ca_file)) {
+        if ((ret = mbedtls_x509_crt_parse_file(&cacert, opt.ca_file)) < 0) {
+            mbedtls_printf(
+                " failed\n  !  mbedtls_x509_crt_parse_file returned -0x%x\n\n",
+                (unsigned int)-ret);
             goto exit;
         }
 
         verify = 1;
     }
 
-    mbedtls_printf( " ok (%d skipped)\n", ret );
+    mbedtls_printf(" ok (%d skipped)\n", ret);
 
-#if defined(MBEDTLS_X509_CRL_PARSE_C)
-    if( strlen( opt.crl_file ) )
-    {
-        if( ( ret = mbedtls_x509_crl_parse_file( &cacrl, opt.crl_file ) ) != 0 )
-        {
-            mbedtls_printf( " failed\n  !  mbedtls_x509_crl_parse returned -0x%x\n\n", (unsigned int) -ret );
+#    if defined(MBEDTLS_X509_CRL_PARSE_C)
+    if (strlen(opt.crl_file)) {
+        if ((ret = mbedtls_x509_crl_parse_file(&cacrl, opt.crl_file)) != 0) {
+            mbedtls_printf(
+                " failed\n  !  mbedtls_x509_crl_parse returned -0x%x\n\n",
+                (unsigned int)-ret);
             goto exit;
         }
 
         verify = 1;
     }
-#endif
+#    endif
 
-    if( opt.mode == MODE_FILE )
-    {
+    if (opt.mode == MODE_FILE) {
         mbedtls_x509_crt crt;
         mbedtls_x509_crt *cur = &crt;
-        mbedtls_x509_crt_init( &crt );
+        mbedtls_x509_crt_init(&crt);
 
         /*
          * 1.1. Load the certificate(s)
          */
-        mbedtls_printf( "\n  . Loading the certificate(s) ..." );
-        fflush( stdout );
+        mbedtls_printf("\n  . Loading the certificate(s) ...");
+        fflush(stdout);
 
-        ret = mbedtls_x509_crt_parse_file( &crt, opt.filename );
+        ret = mbedtls_x509_crt_parse_file(&crt, opt.filename);
 
-        if( ret < 0 )
-        {
-            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse_file returned %d\n\n", ret );
-            mbedtls_x509_crt_free( &crt );
+        if (ret < 0) {
+            mbedtls_printf(
+                " failed\n  !  mbedtls_x509_crt_parse_file returned %d\n\n",
+                ret);
+            mbedtls_x509_crt_free(&crt);
             goto exit;
         }
 
-        if( opt.permissive == 0 && ret > 0 )
-        {
-            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_parse failed to parse %d certificates\n\n", ret );
-            mbedtls_x509_crt_free( &crt );
+        if (opt.permissive == 0 && ret > 0) {
+            mbedtls_printf(
+                " failed\n  !  mbedtls_x509_crt_parse failed to parse %d certificates\n\n",
+                ret);
+            mbedtls_x509_crt_free(&crt);
             goto exit;
         }
 
-        mbedtls_printf( " ok\n" );
+        mbedtls_printf(" ok\n");
 
         /*
          * 1.2 Print the certificate(s)
          */
-        while( cur != NULL )
-        {
-            mbedtls_printf( "  . Peer certificate information    ...\n" );
-            ret = mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, "      ",
-                                 cur );
-            if( ret == -1 )
-            {
-                mbedtls_printf( " failed\n  !  mbedtls_x509_crt_info returned %d\n\n", ret );
-                mbedtls_x509_crt_free( &crt );
+        while (cur != NULL) {
+            mbedtls_printf("  . Peer certificate information    ...\n");
+            ret = mbedtls_x509_crt_info((char *)buf, sizeof(buf) - 1, "      ",
+                                        cur);
+            if (ret == -1) {
+                mbedtls_printf(
+                    " failed\n  !  mbedtls_x509_crt_info returned %d\n\n", ret);
+                mbedtls_x509_crt_free(&crt);
                 goto exit;
             }
 
-            mbedtls_printf( "%s\n", buf );
+            mbedtls_printf("%s\n", buf);
 
             cur = cur->MBEDTLS_PRIVATE(next);
         }
@@ -337,162 +324,158 @@
         /*
          * 1.3 Verify the certificate
          */
-        if( verify )
-        {
-            mbedtls_printf( "  . Verifying X.509 certificate..." );
+        if (verify) {
+            mbedtls_printf("  . Verifying X.509 certificate...");
 
-            if( ( ret = mbedtls_x509_crt_verify( &crt, &cacert, &cacrl, NULL, &flags,
-                                         my_verify, NULL ) ) != 0 )
-            {
+            if ((ret = mbedtls_x509_crt_verify(&crt, &cacert, &cacrl, NULL,
+                                               &flags, my_verify, NULL)) != 0) {
                 char vrfy_buf[512];
 
-                mbedtls_printf( " failed\n" );
+                mbedtls_printf(" failed\n");
 
-                mbedtls_x509_crt_verify_info( vrfy_buf, sizeof( vrfy_buf ), "  ! ", flags );
+                mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), "  ! ",
+                                             flags);
 
-                mbedtls_printf( "%s\n", vrfy_buf );
-            }
-            else
-                mbedtls_printf( " ok\n" );
+                mbedtls_printf("%s\n", vrfy_buf);
+            } else
+                mbedtls_printf(" ok\n");
         }
 
-        mbedtls_x509_crt_free( &crt );
-    }
-    else if( opt.mode == MODE_SSL )
-    {
+        mbedtls_x509_crt_free(&crt);
+    } else if (opt.mode == MODE_SSL) {
         /*
          * 1. Initialize the RNG and the session data
          */
-        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 ssl_exit;
         }
 
-        mbedtls_printf( " ok\n" );
+        mbedtls_printf(" ok\n");
 
-#if defined(MBEDTLS_DEBUG_C)
-        mbedtls_debug_set_threshold( opt.debug_level );
-#endif
+#    if defined(MBEDTLS_DEBUG_C)
+        mbedtls_debug_set_threshold(opt.debug_level);
+#    endif
 
         /*
          * 2. Start the connection
          */
-        mbedtls_printf( "  . SSL connection to tcp/%s/%s...", opt.server_name,
-                                                              opt.server_port );
-        fflush( stdout );
+        mbedtls_printf("  . SSL connection to tcp/%s/%s...", opt.server_name,
+                       opt.server_port);
+        fflush(stdout);
 
-        if( ( ret = mbedtls_net_connect( &server_fd, opt.server_name,
-                                 opt.server_port, MBEDTLS_NET_PROTO_TCP ) ) != 0 )
-        {
-            mbedtls_printf( " failed\n  ! mbedtls_net_connect returned %d\n\n", ret );
+        if ((ret = mbedtls_net_connect(&server_fd, opt.server_name,
+                                       opt.server_port,
+                                       MBEDTLS_NET_PROTO_TCP)) != 0) {
+            mbedtls_printf(" failed\n  ! mbedtls_net_connect returned %d\n\n",
+                           ret);
             goto ssl_exit;
         }
 
         /*
          * 3. Setup stuff
          */
-        if( ( ret = mbedtls_ssl_config_defaults( &conf,
-                        MBEDTLS_SSL_IS_CLIENT,
-                        MBEDTLS_SSL_TRANSPORT_STREAM,
-                        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_STREAM,
+                 MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
+            mbedtls_printf(
+                " failed\n  ! mbedtls_ssl_config_defaults returned %d\n\n",
+                ret);
             goto exit;
         }
 
-        if( verify )
-        {
-            mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_REQUIRED );
-            mbedtls_ssl_conf_ca_chain( &conf, &cacert, NULL );
-            mbedtls_ssl_conf_verify( &conf, my_verify, NULL );
-        }
-        else
-            mbedtls_ssl_conf_authmode( &conf, MBEDTLS_SSL_VERIFY_NONE );
+        if (verify) {
+            mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_REQUIRED);
+            mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL);
+            mbedtls_ssl_conf_verify(&conf, my_verify, NULL);
+        } else
+            mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_NONE);
 
-        mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg );
-        mbedtls_ssl_conf_dbg( &conf, my_debug, stdout );
+        mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg);
+        mbedtls_ssl_conf_dbg(&conf, my_debug, stdout);
 
-        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 ssl_exit;
         }
 
-        if( ( ret = mbedtls_ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
-        {
-            mbedtls_printf( " failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n", ret );
+        if ((ret = mbedtls_ssl_set_hostname(&ssl, opt.server_name)) != 0) {
+            mbedtls_printf(
+                " failed\n  ! mbedtls_ssl_set_hostname returned %d\n\n", ret);
             goto ssl_exit;
         }
 
-        mbedtls_ssl_set_bio( &ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL );
+        mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send,
+                            mbedtls_net_recv, NULL);
 
         /*
          * 4. Handshake
          */
-        while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 )
-        {
-            if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE )
-            {
-                mbedtls_printf( " failed\n  ! mbedtls_ssl_handshake returned %d\n\n", ret );
+        while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) {
+            if (ret != MBEDTLS_ERR_SSL_WANT_READ &&
+                ret != MBEDTLS_ERR_SSL_WANT_WRITE) {
+                mbedtls_printf(
+                    " failed\n  ! mbedtls_ssl_handshake returned %d\n\n", ret);
                 goto ssl_exit;
             }
         }
 
-        mbedtls_printf( " ok\n" );
+        mbedtls_printf(" ok\n");
 
         /*
          * 5. Print the certificate
          */
-#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
-        mbedtls_printf( "  . Peer certificate information    ... skipped\n" );
-#else
-        mbedtls_printf( "  . Peer certificate information    ...\n" );
-        ret = mbedtls_x509_crt_info( (char *) buf, sizeof( buf ) - 1, "      ",
-                                     mbedtls_ssl_get_peer_cert( &ssl ) );
-        if( ret == -1 )
-        {
-            mbedtls_printf( " failed\n  !  mbedtls_x509_crt_info returned %d\n\n", ret );
+#    if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE)
+        mbedtls_printf("  . Peer certificate information    ... skipped\n");
+#    else
+        mbedtls_printf("  . Peer certificate information    ...\n");
+        ret = mbedtls_x509_crt_info((char *)buf, sizeof(buf) - 1, "      ",
+                                    mbedtls_ssl_get_peer_cert(&ssl));
+        if (ret == -1) {
+            mbedtls_printf(
+                " failed\n  !  mbedtls_x509_crt_info returned %d\n\n", ret);
             goto ssl_exit;
         }
 
-        mbedtls_printf( "%s\n", buf );
-#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
+        mbedtls_printf("%s\n", buf);
+#    endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */
 
-        mbedtls_ssl_close_notify( &ssl );
+        mbedtls_ssl_close_notify(&ssl);
 
 ssl_exit:
-        mbedtls_ssl_free( &ssl );
-        mbedtls_ssl_config_free( &conf );
-    }
-    else
+        mbedtls_ssl_free(&ssl);
+        mbedtls_ssl_config_free(&conf);
+    } else
         goto usage;
 
     exit_code = MBEDTLS_EXIT_SUCCESS;
 
 exit:
 
-    mbedtls_net_free( &server_fd );
-    mbedtls_x509_crt_free( &cacert );
-#if defined(MBEDTLS_X509_CRL_PARSE_C)
-    mbedtls_x509_crl_free( &cacrl );
-#endif
-    mbedtls_ctr_drbg_free( &ctr_drbg );
-    mbedtls_entropy_free( &entropy );
+    mbedtls_net_free(&server_fd);
+    mbedtls_x509_crt_free(&cacert);
+#    if defined(MBEDTLS_X509_CRL_PARSE_C)
+    mbedtls_x509_crl_free(&cacrl);
+#    endif
+    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
 
-    mbedtls_exit( exit_code );
+    mbedtls_exit(exit_code);
 }
-#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C &&
-          MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&
+#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C && \
+          MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C &&        \
           MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */