tests/x509self.c

   1 /*
   2  * Copyright (C) 2004-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Simon Josefsson
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * GnuTLS is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * GnuTLS is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with GnuTLS; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 /* Parts copied from GnuTLS example programs. */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <sys/types.h>
  33 # include <sys/socket.h>
  34 #if !defined(_WIN32)
  35 # include <netinet/in.h>
  36 # include <sys/wait.h>
  37 # include <arpa/inet.h>
  38 #endif
  39 #include <unistd.h>
  40 #include <gnutls/gnutls.h>
  41
  42 #include "utils.h"
  43
  44 #include "ex-session-info.c"
  45 #include "ex-x509-info.c"
  46 #include "tcp.c"
  47
  48 pid_t child;
  49
  50 static void
  51 tls_log_func (int level, const char *str)
  52 {
  53   fprintf (stderr, "%s |<%d>| %s", child ? "server" : "client", level, str);
  54 }
  55
  56 /* A very basic TLS client, with anonymous authentication.
  57  */
  58
  59
  60 #define MAX_BUF 1024
  61 #define MSG "Hello TLS"
  62
  63 static unsigned char ca_pem[] =
  64   "-----BEGIN CERTIFICATE-----\n"
  65   "MIIB5zCCAVKgAwIBAgIERiYdJzALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
  66   "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTExWhcNMDgwNDE3MTMyOTExWjAZMRcw\n"
  67   "FQYDVQQDEw5HbnVUTFMgdGVzdCBDQTCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA\n"
  68   "vuyYeh1vfmslnuggeEKgZAVmQ5ltSdUY7H25WGSygKMUYZ0KT74v8C780qtcNt9T\n"
  69   "7EPH/N6RvB4BprdssgcQLsthR3XKA84jbjjxNCcaGs33lvOz8A1nf8p3hD+cKfRi\n"
  70   "kfYSW2JazLrtCC4yRCas/SPOUxu78of+3HiTfFm/oXUCAwEAAaNDMEEwDwYDVR0T\n"
  71   "AQH/BAUwAwEB/zAPBgNVHQ8BAf8EBQMDBwQAMB0GA1UdDgQWBBTpPBz7rZJu5gak\n"
  72   "Viyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAiaIRqGfp1jPpNeVhABK60SU0KIAy\n"
  73   "njuu7kHq5peUgYn8Jd9zNzExBOEp1VOipGsf6G66oQAhDFp2o8zkz7ZH71zR4HEW\n"
  74   "KoX6n5Emn6DvcEH/9pAhnGxNHJAoS7czTKv/JDZJhkqHxyrE1fuLsg5Qv25DTw7+\n"
  75   "PfqUpIhz5Bbm7J4=\n" "-----END CERTIFICATE-----\n";
  76 const gnutls_datum_t ca = { ca_pem, sizeof (ca_pem) };
  77
  78 static unsigned char cert_pem[] =
  79   "-----BEGIN CERTIFICATE-----\n"
  80   "MIICHjCCAYmgAwIBAgIERiYdNzALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
  81   "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTI3WhcNMDgwNDE3MTMyOTI3WjAdMRsw\n"
  82   "GQYDVQQDExJHbnVUTFMgdGVzdCBjbGllbnQwgZwwCwYJKoZIhvcNAQEBA4GMADCB\n"
  83   "iAKBgLtmQ/Xyxde2jMzF3/WIO7HJS2oOoa0gUEAIgKFPXKPQ+GzP5jz37AR2ExeL\n"
  84   "ZIkiW8DdU3w77XwEu4C5KL6Om8aOoKUSy/VXHqLnu7czSZ/ju0quak1o/8kR4jKN\n"
  85   "zj2AC41179gAgY8oBAOgIo1hBAf6tjd9IQdJ0glhaZiQo1ipAgMBAAGjdjB0MAwG\n"
  86   "A1UdEwEB/wQCMAAwEwYDVR0lBAwwCgYIKwYBBQUHAwIwDwYDVR0PAQH/BAUDAweg\n"
  87   "ADAdBgNVHQ4EFgQUTLkKm/odNON+3svSBxX+odrLaJEwHwYDVR0jBBgwFoAU6Twc\n"
  88   "+62SbuYGpFYsouHAUyfI8pUwCwYJKoZIhvcNAQEFA4GBALujmBJVZnvaTXr9cFRJ\n"
  89   "jpfc/3X7sLUsMvumcDE01ls/cG5mIatmiyEU9qI3jbgUf82z23ON/acwJf875D3/\n"
  90   "U7jyOsBJ44SEQITbin2yUeJMIm1tievvdNXBDfW95AM507ShzP12sfiJkJfjjdhy\n"
  91   "dc8Siq5JojruiMizAf0pA7in\n" "-----END CERTIFICATE-----\n";
  92 const gnutls_datum_t cert = { cert_pem, sizeof (cert_pem) };
  93
  94 static unsigned char key_pem[] =
  95   "-----BEGIN RSA PRIVATE KEY-----\n"
  96   "MIICXAIBAAKBgQC7ZkP18sXXtozMxd/1iDuxyUtqDqGtIFBACIChT1yj0Phsz+Y8\n"
  97   "9+wEdhMXi2SJIlvA3VN8O+18BLuAuSi+jpvGjqClEsv1Vx6i57u3M0mf47tKrmpN\n"
  98   "aP/JEeIyjc49gAuNde/YAIGPKAQDoCKNYQQH+rY3fSEHSdIJYWmYkKNYqQIDAQAB\n"
  99   "AoGADpmARG5CQxS+AesNkGmpauepiCz1JBF/JwnyiX6vEzUh0Ypd39SZztwrDxvF\n"
 100   "PJjQaKVljml1zkJpIDVsqvHdyVdse8M+Qn6hw4x2p5rogdvhhIL1mdWo7jWeVJTF\n"
 101   "RKB7zLdMPs3ySdtcIQaF9nUAQ2KJEvldkO3m/bRJFEp54k0CQQDYy+RlTmwRD6hy\n"
 102   "7UtMjR0H3CSZJeQ8svMCxHLmOluG9H1UKk55ZBYfRTsXniqUkJBZ5wuV1L+pR9EK\n"
 103   "ca89a+1VAkEA3UmBelwEv2u9cAU1QjKjmwju1JgXbrjEohK+3B5y0ESEXPAwNQT9\n"
 104   "TrDM1m9AyxYTWLxX93dI5QwNFJtmbtjeBQJARSCWXhsoaDRG8QZrCSjBxfzTCqZD\n"
 105   "ZXtl807ymCipgJm60LiAt0JLr4LiucAsMZz6+j+quQbSakbFCACB8SLV1QJBAKZQ\n"
 106   "YKf+EPNtnmta/rRKKvySsi3GQZZN+Dt3q0r094XgeTsAqrqujVNfPhTMeP4qEVBX\n"
 107   "/iVX2cmMTSh3w3z8MaECQEp0XJWDVKOwcTW6Ajp9SowtmiZ3YDYo1LF9igb4iaLv\n"
 108   "sWZGfbnU3ryjvkb6YuFjgtzbZDZHWQCo8/cOtOBmPdk=\n"
 109   "-----END RSA PRIVATE KEY-----\n";
 110 const gnutls_datum_t key = { key_pem, sizeof (key_pem) };
 111
 112 static void
 113 client (void)
 114 {
 115   int ret, sd, ii;
 116   gnutls_session_t session;
 117   char buffer[MAX_BUF + 1];
 118   gnutls_certificate_credentials_t xcred;
 119
 120   gnutls_global_init ();
 121
 122   gnutls_global_set_log_function (tls_log_func);
 123   if (debug)
 124     gnutls_global_set_log_level (6);
 125
 126   gnutls_certificate_allocate_credentials (&xcred);
 127
 128   /* sets the trusted cas file
 129    */
 130   gnutls_certificate_set_x509_trust_mem (xcred, &ca, GNUTLS_X509_FMT_PEM);
 131   gnutls_certificate_set_x509_key_mem (xcred, &cert, &key,
 132                                        GNUTLS_X509_FMT_PEM);
 133
 134   /* Initialize TLS session
 135    */
 136   gnutls_init (&session, GNUTLS_CLIENT);
 137
 138   /* Use default priorities */
 139   gnutls_set_default_priority (session);
 140
 141   /* put the x509 credentials to the current session
 142    */
 143   gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, xcred);
 144
 145   /* connect to the peer
 146    */
 147   sd = tcp_connect ();
 148
 149   gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
 150
 151   /* Perform the TLS handshake
 152    */
 153   ret = gnutls_handshake (session);
 154
 155   if (ret < 0)
 156     {
 157       fail ("client: Handshake failed\n");
 158       gnutls_perror (ret);
 159       goto end;
 160     }
 161   else if (debug)
 162     {
 163       success ("client: Handshake was completed\n");
 164     }
 165
 166   if (debug)
 167     success ("client: TLS version is: %s\n",
 168              gnutls_protocol_get_name (gnutls_protocol_get_version
 169                                        (session)));
 170
 171   /* see the Getting peer's information example */
 172   if (debug)
 173     print_info (session);
 174
 175   ret = gnutls_record_send (session, MSG, strlen (MSG));
 176
 177   if (ret == strlen (MSG))
 178     {
 179       if (debug)
 180         success ("client: sent record.\n");
 181     }
 182   else
 183     {
 184       fail ("client: failed to send record.\n");
 185       gnutls_perror (ret);
 186       goto end;
 187     }
 188
 189   ret = gnutls_record_recv (session, buffer, MAX_BUF);
 190
 191   if (debug)
 192     success ("client: recv returned %d.\n", ret);
 193
 194   if (ret == GNUTLS_E_REHANDSHAKE)
 195     {
 196       if (debug)
 197         success ("client: doing handshake!\n");
 198       ret = gnutls_handshake (session);
 199       if (ret == 0)
 200         {
 201           if (debug)
 202             success ("client: handshake complete, reading again.\n");
 203           ret = gnutls_record_recv (session, buffer, MAX_BUF);
 204         }
 205       else
 206         {
 207           fail ("client: handshake failed.\n");
 208         }
 209     }
 210
 211   if (ret == 0)
 212     {
 213       if (debug)
 214         success ("client: Peer has closed the TLS connection\n");
 215       goto end;
 216     }
 217   else if (ret < 0)
 218     {
 219       fail ("client: Error: %s\n", gnutls_strerror (ret));
 220       goto end;
 221     }
 222
 223   if (debug)
 224     {
 225       printf ("- Received %d bytes: ", ret);
 226       for (ii = 0; ii < ret; ii++)
 227         {
 228           fputc (buffer[ii], stdout);
 229         }
 230       fputs ("\n", stdout);
 231     }
 232
 233   gnutls_bye (session, GNUTLS_SHUT_RDWR);
 234
 235 end:
 236
 237   tcp_close (sd);
 238
 239   gnutls_deinit (session);
 240
 241   gnutls_certificate_free_credentials (xcred);
 242
 243   gnutls_global_deinit ();
 244 }
 245
 246 /* This is a sample TLS 1.0 echo server, using X.509 authentication.
 247  */
 248
 249 #define SA struct sockaddr
 250 #define MAX_BUF 1024
 251 #define PORT 5556               /* listen to 5556 port */
 252 #define DH_BITS 1024
 253
 254 /* These are global */
 255 gnutls_certificate_credentials_t x509_cred;
 256
 257 static gnutls_session_t
 258 initialize_tls_session (void)
 259 {
 260   gnutls_session_t session;
 261
 262   gnutls_init (&session, GNUTLS_SERVER);
 263
 264   /* avoid calling all the priority functions, since the defaults
 265    * are adequate.
 266    */
 267   gnutls_set_default_priority (session);
 268
 269   gnutls_credentials_set (session, GNUTLS_CRD_CERTIFICATE, x509_cred);
 270
 271   /* request client certificate if any.
 272      Moved to later on to be able to test re-handshakes.
 273      gnutls_certificate_server_set_request (session, GNUTLS_CERT_REQUEST);
 274    */
 275
 276   gnutls_dh_set_prime_bits (session, DH_BITS);
 277
 278   return session;
 279 }
 280
 281 static gnutls_dh_params_t dh_params;
 282
 283 static int
 284 generate_dh_params (void)
 285 {
 286   const gnutls_datum_t p3 = { (void *) pkcs3, strlen (pkcs3) };
 287   /* Generate Diffie-Hellman parameters - for use with DHE
 288    * kx algorithms. These should be discarded and regenerated
 289    * once a day, once a week or once a month. Depending on the
 290    * security requirements.
 291    */
 292   gnutls_dh_params_init (&dh_params);
 293   return gnutls_dh_params_import_pkcs3 (dh_params, &p3, GNUTLS_X509_FMT_PEM);
 294 }
 295
 296 int err, listen_sd, i;
 297 int sd, ret;
 298 struct sockaddr_in sa_serv;
 299 struct sockaddr_in sa_cli;
 300 socklen_t client_len;
 301 char topbuf[512];
 302 gnutls_session_t session;
 303 char buffer[MAX_BUF + 1];
 304 int optval = 1;
 305
 306
 307 static unsigned char server_cert_pem[] =
 308   "-----BEGIN CERTIFICATE-----\n"
 309   "MIICVjCCAcGgAwIBAgIERiYdMTALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
 310   "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTIxWhcNMDgwNDE3MTMyOTIxWjA3MRsw\n"
 311   "GQYDVQQKExJHbnVUTFMgdGVzdCBzZXJ2ZXIxGDAWBgNVBAMTD3Rlc3QuZ251dGxz\n"
 312   "Lm9yZzCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA17pcr6MM8C6pJ1aqU46o63+B\n"
 313   "dUxrmL5K6rce+EvDasTaDQC46kwTHzYWk95y78akXrJutsoKiFV1kJbtple8DDt2\n"
 314   "DZcevensf9Op7PuFZKBroEjOd35znDET/z3IrqVgbtm2jFqab7a+n2q9p/CgMyf1\n"
 315   "tx2S5Zacc1LWn9bIjrECAwEAAaOBkzCBkDAMBgNVHRMBAf8EAjAAMBoGA1UdEQQT\n"
 316   "MBGCD3Rlc3QuZ251dGxzLm9yZzATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHQ8B\n"
 317   "Af8EBQMDB6AAMB0GA1UdDgQWBBTrx0Vu5fglyoyNgw106YbU3VW0dTAfBgNVHSME\n"
 318   "GDAWgBTpPBz7rZJu5gakViyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAaFEPTt+7\n"
 319   "bzvBuOf7+QmeQcn29kT6Bsyh1RHJXf8KTk5QRfwp6ogbp94JQWcNQ/S7YDFHglD1\n"
 320   "AwUNBRXwd3riUsMnsxgeSDxYBfJYbDLeohNBsqaPDJb7XailWbMQKfAbFQ8cnOxg\n"
 321   "rOKLUQRWJ0K3HyXRMhbqjdLIaQiCvQLuizo=\n" "-----END CERTIFICATE-----\n";
 322
 323 const gnutls_datum_t server_cert = { server_cert_pem,
 324   sizeof (server_cert_pem)
 325 };
 326
 327 static unsigned char server_key_pem[] =
 328   "-----BEGIN RSA PRIVATE KEY-----\n"
 329   "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"
 330   "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"
 331   "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"
 332   "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"
 333   "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"
 334   "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"
 335   "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"
 336   "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"
 337   "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"
 338   "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"
 339   "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"
 340   "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"
 341   "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"
 342   "-----END RSA PRIVATE KEY-----\n";
 343
 344 const gnutls_datum_t server_key = { server_key_pem,
 345   sizeof (server_key_pem)
 346 };
 347
 348 static void
 349 server_start (void)
 350 {
 351   /* Socket operations
 352    */
 353   listen_sd = socket (AF_INET, SOCK_STREAM, 0);
 354   if (err == -1)
 355     {
 356       perror ("socket");
 357       fail ("server: socket failed\n");
 358       return;
 359     }
 360
 361   memset (&sa_serv, '\0', sizeof (sa_serv));
 362   sa_serv.sin_family = AF_INET;
 363   sa_serv.sin_addr.s_addr = INADDR_ANY;
 364   sa_serv.sin_port = htons (PORT);      /* Server Port number */
 365
 366   setsockopt (listen_sd, SOL_SOCKET, SO_REUSEADDR, (void *) &optval,
 367               sizeof (int));
 368
 369   err = bind (listen_sd, (SA *) & sa_serv, sizeof (sa_serv));
 370   if (err == -1)
 371     {
 372       perror ("bind");
 373       fail ("server: bind failed\n");
 374       return;
 375     }
 376
 377   err = listen (listen_sd, 1024);
 378   if (err == -1)
 379     {
 380       perror ("listen");
 381       fail ("server: listen failed\n");
 382       return;
 383     }
 384
 385   if (debug)
 386     success ("server: ready. Listening to port '%d'.\n", PORT);
 387 }
 388
 389 static void
 390 server (void)
 391 {
 392   /* this must be called once in the program
 393    */
 394   gnutls_global_init ();
 395
 396   gnutls_global_set_log_function (tls_log_func);
 397   if (debug)
 398     gnutls_global_set_log_level (6);
 399
 400   gnutls_certificate_allocate_credentials (&x509_cred);
 401   gnutls_certificate_set_x509_trust_mem (x509_cred, &ca, GNUTLS_X509_FMT_PEM);
 402
 403   gnutls_certificate_set_x509_key_mem (x509_cred, &server_cert, &server_key,
 404                                        GNUTLS_X509_FMT_PEM);
 405
 406   if (debug)
 407     success ("Launched, generating DH parameters...\n");
 408
 409   generate_dh_params ();
 410
 411   gnutls_certificate_set_dh_params (x509_cred, dh_params);
 412
 413   client_len = sizeof (sa_cli);
 414
 415   session = initialize_tls_session ();
 416
 417   sd = accept (listen_sd, (SA *) & sa_cli, &client_len);
 418
 419   if (debug)
 420     success ("server: connection from %s, port %d\n",
 421              inet_ntop (AF_INET, &sa_cli.sin_addr, topbuf,
 422                         sizeof (topbuf)), ntohs (sa_cli.sin_port));
 423
 424   gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) sd);
 425   ret = gnutls_handshake (session);
 426   if (ret < 0)
 427     {
 428       close (sd);
 429       gnutls_deinit (session);
 430       fail ("server: Handshake has failed (%s)\n\n", gnutls_strerror (ret));
 431       return;
 432     }
 433   if (debug)
 434     {
 435       success ("server: Handshake was completed\n");
 436       success ("server: TLS version is: %s\n",
 437                gnutls_protocol_get_name (gnutls_protocol_get_version
 438                                          (session)));
 439     }
 440
 441   /* see the Getting peer's information example */
 442   if (debug)
 443     print_info (session);
 444
 445   i = 0;
 446   for (;;)
 447     {
 448       memset (buffer, 0, MAX_BUF + 1);
 449       ret = gnutls_record_recv (session, buffer, MAX_BUF);
 450
 451       if (ret == 0)
 452         {
 453           if (debug)
 454             success ("server: Peer has closed the GnuTLS connection\n");
 455           break;
 456         }
 457       else if (ret < 0)
 458         {
 459           fail ("server: Received corrupted data(%d). Closing...\n", ret);
 460           break;
 461         }
 462       else if (ret > 0)
 463         {
 464           gnutls_certificate_server_set_request (session,
 465                                                  GNUTLS_CERT_REQUEST);
 466
 467           if (debug)
 468             success ("server: got data, forcing rehandshake.\n");
 469
 470           ret = gnutls_rehandshake (session);
 471           if (ret < 0)
 472             {
 473               fail ("server: rehandshake failed\n");
 474               gnutls_perror (ret);
 475               break;
 476             }
 477
 478           ret = gnutls_handshake (session);
 479           if (ret < 0)
 480             {
 481               fail ("server: (re)handshake failed\n");
 482               gnutls_perror (ret);
 483               break;
 484             }
 485
 486           if (debug)
 487             success ("server: rehandshake complete.\n");
 488
 489           /* echo data back to the client
 490            */
 491           gnutls_record_send (session, buffer, strlen (buffer));
 492         }
 493     }
 494   /* do not wait for the peer to close the connection.
 495    */
 496   gnutls_bye (session, GNUTLS_SHUT_WR);
 497
 498   close (sd);
 499   gnutls_deinit (session);
 500
 501   close (listen_sd);
 502
 503   gnutls_certificate_free_credentials (x509_cred);
 504
 505   gnutls_dh_params_deinit (dh_params);
 506
 507   gnutls_global_deinit ();
 508
 509   if (debug)
 510     success ("server: finished\n");
 511 }
 512
 513
 514 void
 515 doit (void)
 516 {
 517   /* parent */
 518   server_start ();
 519   if (error_count)
 520     return;
 521
 522   child = fork ();
 523   if (child < 0)
 524     {
 525       perror ("fork");
 526       fail ("fork");
 527       return;
 528     }
 529
 530   if (child)
 531     {
 532       int status;
 533
 534       server ();
 535       wait (&status);
 536     }
 537   else
 538     client ();
 539 }