cups/http-addr.c

   1 /*
   2  * "$Id: http-addr.c 11374 2013-11-04 23:49:10Z msweet $"
   3  *
   4  * HTTP address routines for CUPS.
   5  *
   6  * Copyright 2007-2013 by Apple Inc.
   7  * Copyright 1997-2006 by Easy Software Products, all rights reserved.
   8  *
   9  * These coded instructions, statements, and computer programs are the
  10  * property of Apple Inc. and are protected by Federal copyright
  11  * law.  Distribution and use rights are outlined in the file "LICENSE.txt"
  12  * which should have been included with this file.  If this file is
  13  * file is missing or damaged, see the license at "http://www.cups.org/".
  14  */
  15
  16 /*
  17  * Include necessary headers...
  18  */
  19
  20 #include "cups-private.h"
  21 #ifdef HAVE_RESOLV_H
  22 #  include <resolv.h>
  23 #endif /* HAVE_RESOLV_H */
  24 #ifdef __APPLE__
  25 #  include <CoreFoundation/CoreFoundation.h>
  26 #  include <SystemConfiguration/SystemConfiguration.h>
  27 #endif /* __APPLE__ */
  28
  29
  30 /*
  31  * 'httpAddrAny()' - Check for the "any" address.
  32  *
  33  * @since CUPS 1.2/OS X 10.5@
  34  */
  35
  36 int                                     /* O - 1 if "any", 0 otherwise */
  37 httpAddrAny(const http_addr_t *addr)    /* I - Address to check */
  38 {
  39   if (!addr)
  40     return (0);
  41
  42 #ifdef AF_INET6
  43   if (addr->addr.sa_family == AF_INET6 &&
  44       IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr)))
  45     return (1);
  46 #endif /* AF_INET6 */
  47
  48   if (addr->addr.sa_family == AF_INET &&
  49       ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000)
  50     return (1);
  51
  52   return (0);
  53 }
  54
  55
  56 /*
  57  * 'httpAddrEqual()' - Compare two addresses.
  58  *
  59  * @since CUPS 1.2/OS X 10.5@
  60  */
  61
  62 int                                             /* O - 1 if equal, 0 if not */
  63 httpAddrEqual(const http_addr_t *addr1,         /* I - First address */
  64               const http_addr_t *addr2)         /* I - Second address */
  65 {
  66   if (!addr1 && !addr2)
  67     return (1);
  68
  69   if (!addr1 || !addr2)
  70     return (0);
  71
  72   if (addr1->addr.sa_family != addr2->addr.sa_family)
  73     return (0);
  74
  75 #ifdef AF_LOCAL
  76   if (addr1->addr.sa_family == AF_LOCAL)
  77     return (!strcmp(addr1->un.sun_path, addr2->un.sun_path));
  78 #endif /* AF_LOCAL */
  79
  80 #ifdef AF_INET6
  81   if (addr1->addr.sa_family == AF_INET6)
  82     return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16));
  83 #endif /* AF_INET6 */
  84
  85   return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr);
  86 }
  87
  88
  89 /*
  90  * 'httpAddrLength()' - Return the length of the address in bytes.
  91  *
  92  * @since CUPS 1.2/OS X 10.5@
  93  */
  94
  95 int                                     /* O - Length in bytes */
  96 httpAddrLength(const http_addr_t *addr) /* I - Address */
  97 {
  98   if (!addr)
  99     return (0);
 100
 101 #ifdef AF_INET6
 102   if (addr->addr.sa_family == AF_INET6)
 103     return (sizeof(addr->ipv6));
 104   else
 105 #endif /* AF_INET6 */
 106 #ifdef AF_LOCAL
 107   if (addr->addr.sa_family == AF_LOCAL)
 108     return (offsetof(struct sockaddr_un, sun_path) +
 109             strlen(addr->un.sun_path) + 1);
 110   else
 111 #endif /* AF_LOCAL */
 112   if (addr->addr.sa_family == AF_INET)
 113     return (sizeof(addr->ipv4));
 114   else
 115     return (0);
 116
 117 }
 118
 119
 120 /*
 121  * 'httpAddrListen()' - Create a listening socket bound to the specified
 122  *                      address and port.
 123  *
 124  * @since CUPS 1.7/OS X 10.9@
 125  */
 126
 127 int                                     /* O - Socket or -1 on error */
 128 httpAddrListen(http_addr_t *addr,       /* I - Address to bind to */
 129                int         port)        /* I - Port number to bind to */
 130 {
 131   int           fd = -1,                /* Socket */
 132                 val;                    /* Socket value */
 133
 134
 135  /*
 136   * Range check input...
 137   */
 138
 139   if (!addr || port <= 0)
 140     return (-1);
 141
 142   if ((fd = socket(addr->addr.sa_family, SOCK_STREAM, 0)) < 0)
 143   {
 144     _cupsSetHTTPError(HTTP_STATUS_ERROR);
 145     return (-1);
 146   }
 147
 148   val = 1;
 149   setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, CUPS_SOCAST &val, sizeof(val));
 150
 151 #ifdef IPV6_V6ONLY
 152   if (addr->addr.sa_family == AF_INET6)
 153     setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, CUPS_SOCAST &val, sizeof(val));
 154 #endif /* IPV6_V6ONLY */
 155
 156   _httpAddrSetPort(addr, port);
 157
 158   if (bind(fd, (struct sockaddr *)addr, httpAddrLength(addr)))
 159   {
 160     _cupsSetHTTPError(HTTP_STATUS_ERROR);
 161
 162     close(fd);
 163
 164     return (-1);
 165   }
 166
 167   if (listen(fd, 5))
 168   {
 169     _cupsSetHTTPError(HTTP_STATUS_ERROR);
 170
 171     close(fd);
 172
 173     return (-1);
 174   }
 175
 176 #ifdef SO_NOSIGPIPE
 177  /*
 178   * Disable SIGPIPE for this socket.
 179   */
 180
 181   val = 1;
 182   setsockopt(fd, SOL_SOCKET, SO_NOSIGPIPE, CUPS_SOCAST &val, sizeof(val));
 183 #endif /* SO_NOSIGPIPE */
 184
 185   return (fd);
 186 }
 187
 188
 189 /*
 190  * 'httpAddrLocalhost()' - Check for the local loopback address.
 191  *
 192  * @since CUPS 1.2/OS X 10.5@
 193  */
 194
 195 int                                     /* O - 1 if local host, 0 otherwise */
 196 httpAddrLocalhost(
 197     const http_addr_t *addr)            /* I - Address to check */
 198 {
 199   if (!addr)
 200     return (1);
 201
 202 #ifdef AF_INET6
 203   if (addr->addr.sa_family == AF_INET6 &&
 204       IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr)))
 205     return (1);
 206 #endif /* AF_INET6 */
 207
 208 #ifdef AF_LOCAL
 209   if (addr->addr.sa_family == AF_LOCAL)
 210     return (1);
 211 #endif /* AF_LOCAL */
 212
 213   if (addr->addr.sa_family == AF_INET &&
 214       (ntohl(addr->ipv4.sin_addr.s_addr) & 0xff000000) == 0x7f000000)
 215     return (1);
 216
 217   return (0);
 218 }
 219
 220
 221 /*
 222  * 'httpAddrLookup()' - Lookup the hostname associated with the address.
 223  *
 224  * @since CUPS 1.2/OS X 10.5@
 225  */
 226
 227 char *                                  /* O - Host name */
 228 httpAddrLookup(
 229     const http_addr_t *addr,            /* I - Address to lookup */
 230     char              *name,            /* I - Host name buffer */
 231     int               namelen)          /* I - Size of name buffer */
 232 {
 233   _cups_globals_t       *cg = _cupsGlobals();
 234                                         /* Global data */
 235
 236
 237   DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)", addr, name,
 238                 namelen));
 239
 240  /*
 241   * Range check input...
 242   */
 243
 244   if (!addr || !name || namelen <= 2)
 245   {
 246     if (name && namelen >= 1)
 247       *name = '\0';
 248
 249     return (NULL);
 250   }
 251
 252 #ifdef AF_LOCAL
 253   if (addr->addr.sa_family == AF_LOCAL)
 254   {
 255     strlcpy(name, addr->un.sun_path, namelen);
 256     return (name);
 257   }
 258 #endif /* AF_LOCAL */
 259
 260  /*
 261   * Optimize lookups for localhost/loopback addresses...
 262   */
 263
 264   if (httpAddrLocalhost(addr))
 265   {
 266     strlcpy(name, "localhost", namelen);
 267     return (name);
 268   }
 269
 270 #ifdef HAVE_RES_INIT
 271  /*
 272   * STR #2920: Initialize resolver after failure in cups-polld
 273   *
 274   * If the previous lookup failed, re-initialize the resolver to prevent
 275   * temporary network errors from persisting.  This *should* be handled by
 276   * the resolver libraries, but apparently the glibc folks do not agree.
 277   *
 278   * We set a flag at the end of this function if we encounter an error that
 279   * requires reinitialization of the resolver functions.  We then call
 280   * res_init() if the flag is set on the next call here or in httpAddrLookup().
 281   */
 282
 283   if (cg->need_res_init)
 284   {
 285     res_init();
 286
 287     cg->need_res_init = 0;
 288   }
 289 #endif /* HAVE_RES_INIT */
 290
 291 #ifdef HAVE_GETNAMEINFO
 292   {
 293    /*
 294     * STR #2486: httpAddrLookup() fails when getnameinfo() returns EAI_AGAIN
 295     *
 296     * FWIW, I think this is really a bug in the implementation of
 297     * getnameinfo(), but falling back on httpAddrString() is easy to
 298     * do...
 299     */
 300
 301     int error = getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen,
 302                             NULL, 0, 0);
 303
 304     if (error)
 305     {
 306       if (error == EAI_FAIL)
 307         cg->need_res_init = 1;
 308
 309       return (httpAddrString(addr, name, namelen));
 310     }
 311   }
 312 #else
 313   {
 314     struct hostent      *host;                  /* Host from name service */
 315
 316
 317 #  ifdef AF_INET6
 318     if (addr->addr.sa_family == AF_INET6)
 319       host = gethostbyaddr((char *)&(addr->ipv6.sin6_addr),
 320                            sizeof(struct in_addr), AF_INET6);
 321     else
 322 #  endif /* AF_INET6 */
 323     host = gethostbyaddr((char *)&(addr->ipv4.sin_addr),
 324                          sizeof(struct in_addr), AF_INET);
 325
 326     if (host == NULL)
 327     {
 328      /*
 329       * No hostname, so return the raw address...
 330       */
 331
 332       if (h_errno == NO_RECOVERY)
 333         cg->need_res_init = 1;
 334
 335       return (httpAddrString(addr, name, namelen));
 336     }
 337
 338     strlcpy(name, host->h_name, namelen);
 339   }
 340 #endif /* HAVE_GETNAMEINFO */
 341
 342   DEBUG_printf(("1httpAddrLookup: returning \"%s\"...", name));
 343
 344   return (name);
 345 }
 346
 347
 348 /*
 349  * 'httpAddrPort()' - Get the port number associated with an address.
 350  *
 351  * @since CUPS 1.7/OS X 10.9@
 352  */
 353
 354 int                                     /* O - Port number */
 355 httpAddrPort(http_addr_t *addr)         /* I - Address */
 356 {
 357   if (!addr)
 358     return (ippPort());
 359 #ifdef AF_INET6
 360   else if (addr->addr.sa_family == AF_INET6)
 361     return (ntohs(addr->ipv6.sin6_port));
 362 #endif /* AF_INET6 */
 363   else if (addr->addr.sa_family == AF_INET)
 364     return (ntohs(addr->ipv4.sin_port));
 365   else
 366     return (ippPort());
 367 }
 368
 369 /* For OS X 10.8 and earlier */
 370 int _httpAddrPort(http_addr_t *addr) { return (httpAddrPort(addr)); }
 371
 372
 373 /*
 374  * '_httpAddrSetPort()' - Set the port number associated with an address.
 375  */
 376
 377 void
 378 _httpAddrSetPort(http_addr_t *addr,     /* I - Address */
 379                  int         port)      /* I - Port */
 380 {
 381   if (!addr || port <= 0)
 382     return;
 383
 384 #ifdef AF_INET6
 385   if (addr->addr.sa_family == AF_INET6)
 386     addr->ipv6.sin6_port = htons(port);
 387   else
 388 #endif /* AF_INET6 */
 389   if (addr->addr.sa_family == AF_INET)
 390     addr->ipv4.sin_port = htons(port);
 391 }
 392
 393
 394 /*
 395  * 'httpAddrString()' - Convert an address to a numeric string.
 396  *
 397  * @since CUPS 1.2/OS X 10.5@
 398  */
 399
 400 char *                                  /* O - Numeric address string */
 401 httpAddrString(const http_addr_t *addr, /* I - Address to convert */
 402                char              *s,    /* I - String buffer */
 403                int               slen)  /* I - Length of string */
 404 {
 405   DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)", addr, s, slen));
 406
 407  /*
 408   * Range check input...
 409   */
 410
 411   if (!addr || !s || slen <= 2)
 412   {
 413     if (s && slen >= 1)
 414       *s = '\0';
 415
 416     return (NULL);
 417   }
 418
 419 #ifdef AF_LOCAL
 420   if (addr->addr.sa_family == AF_LOCAL)
 421   {
 422     if (addr->un.sun_path[0] == '/')
 423       strlcpy(s, addr->un.sun_path, slen);
 424     else
 425       strlcpy(s, "localhost", slen);
 426   }
 427   else
 428 #endif /* AF_LOCAL */
 429   if (addr->addr.sa_family == AF_INET)
 430   {
 431     unsigned temp;                      /* Temporary address */
 432
 433
 434     temp = ntohl(addr->ipv4.sin_addr.s_addr);
 435
 436     snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255,
 437              (temp >> 16) & 255, (temp >> 8) & 255, temp & 255);
 438   }
 439 #ifdef AF_INET6
 440   else if (addr->addr.sa_family == AF_INET6)
 441   {
 442     char        *sptr,                  /* Pointer into string */
 443                 temps[64];              /* Temporary string for address */
 444
 445 #  ifdef HAVE_GETNAMEINFO
 446     if (getnameinfo(&addr->addr, httpAddrLength(addr), temps, sizeof(temps),
 447                     NULL, 0, NI_NUMERICHOST))
 448     {
 449      /*
 450       * If we get an error back, then the address type is not supported
 451       * and we should zero out the buffer...
 452       */
 453
 454       s[0] = '\0';
 455
 456       return (NULL);
 457     }
 458     else if ((sptr = strchr(temps, '%')) != NULL)
 459     {
 460      /*
 461       * Convert "%zone" to "+zone" to match URI form...
 462       */
 463
 464       *sptr = '+';
 465     }
 466
 467 #  else
 468     int         i;                      /* Looping var */
 469     unsigned    temp;                   /* Current value */
 470     const char  *prefix;                /* Prefix for address */
 471
 472
 473     prefix = "";
 474     for (sptr = temps, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++)
 475     {
 476       temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]);
 477
 478       snprintf(sptr, sizeof(temps) - (sptr - temps), "%s%x", prefix,
 479                (temp >> 16) & 0xffff);
 480       prefix = ":";
 481       sptr += strlen(sptr);
 482
 483       temp &= 0xffff;
 484
 485       if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1])
 486       {
 487         snprintf(sptr, sizeof(temps) - (sptr - temps), "%s%x", prefix, temp);
 488         sptr += strlen(sptr);
 489       }
 490     }
 491
 492     if (i < 4)
 493     {
 494       while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i])
 495         i ++;
 496
 497       if (i < 4)
 498       {
 499         snprintf(sptr, sizeof(temps) - (sptr - temps), "%s:", prefix);
 500         prefix = ":";
 501         sptr += strlen(sptr);
 502
 503         for (; i < 4; i ++)
 504         {
 505           temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]);
 506
 507           if ((temp & 0xffff0000) ||
 508               (i > 0 && addr->ipv6.sin6_addr.s6_addr32[i - 1]))
 509           {
 510             snprintf(sptr, sizeof(temps) - (sptr - temps), "%s%x", prefix,
 511                      (temp >> 16) & 0xffff);
 512             sptr += strlen(sptr);
 513           }
 514
 515           snprintf(sptr, sizeof(temps) - (sptr - temps), "%s%x", prefix,
 516                    temp & 0xffff);
 517           sptr += strlen(sptr);
 518         }
 519       }
 520       else if (sptr == s)
 521       {
 522        /*
 523         * Empty address...
 524         */
 525
 526         strlcpy(temps, "::", sizeof(temps));
 527       }
 528       else
 529       {
 530        /*
 531         * Empty at end...
 532         */
 533
 534         strlcpy(sptr, "::", sizeof(temps) - (sptr - temps));
 535       }
 536     }
 537 #  endif /* HAVE_GETNAMEINFO */
 538
 539    /*
 540     * Add "[v1." and "]" around IPv6 address to convert to URI form.
 541     */
 542
 543     snprintf(s, slen, "[v1.%s]", temps);
 544   }
 545 #endif /* AF_INET6 */
 546   else
 547     strlcpy(s, "UNKNOWN", slen);
 548
 549   DEBUG_printf(("1httpAddrString: returning \"%s\"...", s));
 550
 551   return (s);
 552 }
 553
 554
 555 /*
 556  * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return
 557  *                         address records for the specified name.
 558  *
 559  * @deprecated@
 560  */
 561
 562 struct hostent *                        /* O - Host entry */
 563 httpGetHostByName(const char *name)     /* I - Hostname or IP address */
 564 {
 565   const char            *nameptr;       /* Pointer into name */
 566   unsigned              ip[4];          /* IP address components */
 567   _cups_globals_t       *cg = _cupsGlobals();
 568                                         /* Pointer to library globals */
 569
 570
 571   DEBUG_printf(("httpGetHostByName(name=\"%s\")", name));
 572
 573  /*
 574   * Avoid lookup delays and configuration problems when connecting
 575   * to the localhost address...
 576   */
 577
 578   if (!strcmp(name, "localhost"))
 579     name = "127.0.0.1";
 580
 581  /*
 582   * This function is needed because some operating systems have a
 583   * buggy implementation of gethostbyname() that does not support
 584   * IP addresses.  If the first character of the name string is a
 585   * number, then sscanf() is used to extract the IP components.
 586   * We then pack the components into an IPv4 address manually,
 587   * since the inet_aton() function is deprecated.  We use the
 588   * htonl() macro to get the right byte order for the address.
 589   *
 590   * We also support domain sockets when supported by the underlying
 591   * OS...
 592   */
 593
 594 #ifdef AF_LOCAL
 595   if (name[0] == '/')
 596   {
 597    /*
 598     * A domain socket address, so make an AF_LOCAL entry and return it...
 599     */
 600
 601     cg->hostent.h_name      = (char *)name;
 602     cg->hostent.h_aliases   = NULL;
 603     cg->hostent.h_addrtype  = AF_LOCAL;
 604     cg->hostent.h_length    = strlen(name) + 1;
 605     cg->hostent.h_addr_list = cg->ip_ptrs;
 606     cg->ip_ptrs[0]          = (char *)name;
 607     cg->ip_ptrs[1]          = NULL;
 608
 609     DEBUG_puts("1httpGetHostByName: returning domain socket address...");
 610
 611     return (&cg->hostent);
 612   }
 613 #endif /* AF_LOCAL */
 614
 615   for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++);
 616
 617   if (!*nameptr)
 618   {
 619    /*
 620     * We have an IPv4 address; break it up and provide the host entry
 621     * to the caller.
 622     */
 623
 624     if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4)
 625       return (NULL);                    /* Must have 4 numbers */
 626
 627     if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255)
 628       return (NULL);                    /* Invalid byte ranges! */
 629
 630     cg->ip_addr = htonl((((((((unsigned)ip[0] << 8) | (unsigned)ip[1]) << 8) |
 631                            (unsigned)ip[2]) << 8) |
 632                          (unsigned)ip[3]));
 633
 634    /*
 635     * Fill in the host entry and return it...
 636     */
 637
 638     cg->hostent.h_name      = (char *)name;
 639     cg->hostent.h_aliases   = NULL;
 640     cg->hostent.h_addrtype  = AF_INET;
 641     cg->hostent.h_length    = 4;
 642     cg->hostent.h_addr_list = cg->ip_ptrs;
 643     cg->ip_ptrs[0]          = (char *)&(cg->ip_addr);
 644     cg->ip_ptrs[1]          = NULL;
 645
 646     DEBUG_puts("1httpGetHostByName: returning IPv4 address...");
 647
 648     return (&cg->hostent);
 649   }
 650   else
 651   {
 652    /*
 653     * Use the gethostbyname() function to get the IPv4 address for
 654     * the name...
 655     */
 656
 657     DEBUG_puts("1httpGetHostByName: returning domain lookup address(es)...");
 658
 659     return (gethostbyname(name));
 660   }
 661 }
 662
 663
 664 /*
 665  * 'httpGetHostname()' - Get the FQDN for the connection or local system.
 666  *
 667  * When "http" points to a connected socket, return the hostname or
 668  * address that was used in the call to httpConnect() or httpConnectEncrypt().
 669  * Otherwise, return the FQDN for the local system using both gethostname()
 670  * and gethostbyname() to get the local hostname with domain.
 671  *
 672  * @since CUPS 1.2/OS X 10.5@
 673  */
 674
 675 const char *                            /* O - FQDN for connection or system */
 676 httpGetHostname(http_t *http,           /* I - HTTP connection or NULL */
 677                 char   *s,              /* I - String buffer for name */
 678                 int    slen)            /* I - Size of buffer */
 679 {
 680   if (!s || slen <= 1)
 681     return (NULL);
 682
 683   if (http)
 684   {
 685     if (http->hostname[0] == '/')
 686       strlcpy(s, "localhost", slen);
 687     else
 688       strlcpy(s, http->hostname, slen);
 689   }
 690   else
 691   {
 692    /*
 693     * Get the hostname...
 694     */
 695
 696     if (gethostname(s, slen) < 0)
 697       strlcpy(s, "localhost", slen);
 698
 699     if (!strchr(s, '.'))
 700     {
 701 #ifdef HAVE_SCDYNAMICSTORECOPYCOMPUTERNAME
 702      /*
 703       * The hostname is not a FQDN, so use the local hostname from the
 704       * SystemConfiguration framework...
 705       */
 706
 707       SCDynamicStoreRef sc = SCDynamicStoreCreate(kCFAllocatorDefault,
 708                                                   CFSTR("libcups"), NULL, NULL);
 709                                         /* System configuration data */
 710       CFStringRef       local = sc ? SCDynamicStoreCopyLocalHostName(sc) : NULL;
 711                                         /* Local host name */
 712       char              localStr[1024]; /* Local host name C string */
 713
 714       if (local && CFStringGetCString(local, localStr, sizeof(localStr),
 715                                       kCFStringEncodingUTF8))
 716       {
 717        /*
 718         * Append ".local." to the hostname we get...
 719         */
 720
 721         snprintf(s, slen, "%s.local.", localStr);
 722       }
 723
 724       if (local)
 725         CFRelease(local);
 726       if (sc)
 727         CFRelease(sc);
 728
 729 #else
 730      /*
 731       * The hostname is not a FQDN, so look it up...
 732       */
 733
 734       struct hostent    *host;          /* Host entry to get FQDN */
 735
 736       if ((host = gethostbyname(s)) != NULL && host->h_name)
 737       {
 738        /*
 739         * Use the resolved hostname...
 740         */
 741
 742         strlcpy(s, host->h_name, slen);
 743       }
 744 #endif /* HAVE_SCDYNAMICSTORECOPYCOMPUTERNAME */
 745     }
 746   }
 747
 748  /*
 749   * Return the hostname with as much domain info as we have...
 750   */
 751
 752   return (s);
 753 }
 754
 755
 756 /*
 757  * End of "$Id: http-addr.c 11374 2013-11-04 23:49:10Z msweet $".
 758  */