[thirdparty/cups.git] / cups / http-addr.c

/*
 * "$Id: http-addr.c 5235 2006-03-06 13:02:23Z mike $"
 *
 *   HTTP address routines for the Common UNIX Printing System (CUPS).
 *
 *   Copyright 1997-2006 by Easy Software Products, all rights reserved.
 *
 *   These coded instructions, statements, and computer programs are the
 *   property of Easy Software Products and are protected by Federal
 *   copyright law.  Distribution and use rights are outlined in the file
 *   "LICENSE.txt" which should have been included with this file.  If this
 *   file is missing or damaged please contact Easy Software Products
 *   at:
 *
 *       Attn: CUPS Licensing Information
 *       Easy Software Products
 *       44141 Airport View Drive, Suite 204
 *       Hollywood, Maryland 20636 USA
 *
 *       Voice: (301) 373-9600
 *       EMail: cups-info@cups.org
 *         WWW: http://www.cups.org
 *
 * Contents:
 *
 *   httpAddrAny()       - Check for the "any" address.
 *   httpAddrEqual()     - Compare two addresses.
 *   httpAddrLocalhost() - Check for the local loopback address.
 *   httpAddrLookup()    - Lookup the hostname associated with the address.
 *   httpAddrString()    - Convert an IP address to a dotted string.
 *   httpGetHostByName() - Lookup a hostname or IP address, and return
 *                         address records for the specified name.
 *   httpGetHostname()   - Get the FQDN for the local system.
 */

/*
 * Include necessary headers...
 */

#include "globals.h"
#include "debug.h"
#include <stdlib.h>
#include <stddef.h>


/*
 * 'httpAddrAny()' - Check for the "any" address.
 *
 * @since CUPS 1.2@
 */

int					/* O - 1 if "any", 0 otherwise */
httpAddrAny(const http_addr_t *addr)	/* I - Address to check */
{
#ifdef AF_INET6
  if (addr->addr.sa_family == AF_INET6 &&
      IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr)))
    return (1);
#endif /* AF_INET6 */

  if (addr->addr.sa_family == AF_INET &&
      ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000)
    return (1);

  return (0);
}


/*
 * 'httpAddrEqual()' - Compare two addresses.
 *
 * @since CUPS 1.2@
 */

int						/* O - 1 if equal, 0 if not */
httpAddrEqual(const http_addr_t *addr1,		/* I - First address */
              const http_addr_t *addr2)		/* I - Second address */
{
  if (addr1->addr.sa_family != addr2->addr.sa_family)
    return (0);

#ifdef AF_LOCAL
  if (addr1->addr.sa_family == AF_LOCAL)
    return (!strcmp(addr1->un.sun_path, addr2->un.sun_path));
#endif /* AF_LOCAL */

#ifdef AF_INET6
  if (addr1->addr.sa_family == AF_INET6)
    return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16));
#endif /* AF_INET6 */

  return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr);
}


/*
 * 'httpAddrLength()' - Return the length of the address in bytes.
 *
 * @since CUPS 1.2@
 */

int					/* O - Length in bytes */
httpAddrLength(const http_addr_t *addr)	/* I - Address */
{
#ifdef AF_INET6
  if (addr->addr.sa_family == AF_INET6)
    return (sizeof(addr->ipv6));
  else
#endif /* AF_INET6 */
#ifdef AF_LOCAL
  if (addr->addr.sa_family == AF_LOCAL)
    return (offsetof(struct sockaddr_un, sun_path) +
            strlen(addr->un.sun_path) + 1);
  else
#endif /* AF_LOCAL */
  if (addr->addr.sa_family == AF_INET)
    return (sizeof(addr->ipv4));
  else
    return (0);

}


/*
 * 'httpAddrLocalhost()' - Check for the local loopback address.
 *
 * @since CUPS 1.2@
 */

int					/* O - 1 if local host, 0 otherwise */
httpAddrLocalhost(
    const http_addr_t *addr)		/* I - Address to check */
{
#ifdef AF_INET6
  if (addr->addr.sa_family == AF_INET6 &&
      IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr)))
    return (1);
#endif /* AF_INET6 */

#ifdef AF_LOCAL
  if (addr->addr.sa_family == AF_LOCAL)
    return (1);
#endif /* AF_LOCAL */

  if (addr->addr.sa_family == AF_INET &&
      ntohl(addr->ipv4.sin_addr.s_addr) == 0x7f000001)
    return (1);

  return (0);
}


#ifdef __sgi
#  define ADDR_CAST (struct sockaddr *)
#else
#  define ADDR_CAST (char *)
#endif /* __sgi */


/*
 * 'httpAddrLookup()' - Lookup the hostname associated with the address.
 *
 * @since CUPS 1.2@
 */

char *					/* O - Host name */
httpAddrLookup(
    const http_addr_t *addr,		/* I - Address to lookup */
    char              *name,		/* I - Host name buffer */
    int               namelen)		/* I - Size of name buffer */
{
  DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)\n",
                addr, name, namelen));

 /*
  * Range check input...
  */

  if (!addr || !name || namelen <= 2)
  {
    if (name && namelen >= 1)
      *name = '\0';

    return (NULL);
  }

#ifdef AF_LOCAL
  if (addr->addr.sa_family == AF_LOCAL)
    strlcpy(name, addr->un.sun_path, namelen);
  else
#endif /* AF_LOCAL */
#ifdef HAVE_GETNAMEINFO
  {
    if (getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen,
                    NULL, 0, 0))
    {
     /*
      * If we get an error back, then the address type is not supported
      * and we should zero out the buffer...
      */

      name[0] = '\0';

      return (NULL);
    }
  }
#else
  {
    struct hostent	*host;			/* Host from name service */


#  ifdef AF_INET6
    if (addr->addr.sa_family == AF_INET6)
      host = gethostbyaddr(ADDR_CAST &(addr->ipv6.sin6_addr),
                	   sizeof(struct in_addr), AF_INET6);
    else
#  endif /* AF_INET6 */
    host = gethostbyaddr(ADDR_CAST &(addr->ipv4.sin_addr),
                	 sizeof(struct in_addr), AF_INET);

    if (host == NULL)
    {
     /*
      * No hostname, so return the raw address...
      */

      httpAddrString(addr, name, namelen);
      return (NULL);
    }

    strlcpy(name, host->h_name, namelen);
  }
#endif /* HAVE_GETNAMEINFO */

  return (name);
}


/*
 * 'httpAddrString()' - Convert an address to a numeric string.
 *
 * @since CUPS 1.2@
 */

char *					/* O - Numeric address string */
httpAddrString(const http_addr_t *addr,	/* I - Address to convert */
               char              *s,	/* I - String buffer */
	       int               slen)	/* I - Length of string */
{
  DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)\n",
                addr, s, slen));

 /*
  * Range check input...
  */

  if (!addr || !s || slen <= 2)
  {
    if (s && slen >= 1)
      *s = '\0';

    return (NULL);
  }

#ifdef AF_LOCAL
  if (addr->addr.sa_family == AF_LOCAL)
    strlcpy(s, addr->un.sun_path, slen);
  else
#endif /* AF_LOCAL */
  if (addr->addr.sa_family == AF_INET)
  {
    unsigned temp;			/* Temporary address */


    temp = ntohl(addr->ipv4.sin_addr.s_addr);

    snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255,
             (temp >> 16) & 255, (temp >> 8) & 255, temp & 255);
  }
#ifdef AF_INET6
  else if (addr->addr.sa_family == AF_INET6)
  {
#  ifdef HAVE_GETNAMEINFO
    if (getnameinfo(&addr->addr, httpAddrLength(addr), s, slen,
                    NULL, 0, NI_NUMERICHOST))
    {
     /*
      * If we get an error back, then the address type is not supported
      * and we should zero out the buffer...
      */

      s[0] = '\0';

      return (NULL);
    }
#  else
    char	*sptr;			/* Pointer into string */
    int		i;			/* Looping var */
    unsigned	temp;			/* Current value */
    const char	*prefix;		/* Prefix for address */


    prefix = "";
    for (sptr = s, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++)
    {
      temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]);

      snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff);
      prefix = ":";
      slen -= strlen(sptr);
      sptr += strlen(sptr);

      temp &= 0xffff;

      if (temp || i == 3 || addr->ipv6.sin6_addr.s6_addr32[i + 1])
      {
        snprintf(sptr, slen, "%s%x", prefix, temp);
	slen -= strlen(sptr);
	sptr += strlen(sptr);
      }
    }

    if (i < 4)
    {
      while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i])
	i ++;

      if (i < 4)
      {
        snprintf(sptr, slen, "%s:", prefix);
	prefix = ":";
	slen -= strlen(sptr);
	sptr += strlen(sptr);

	for (; i < 4; i ++)
	{
          temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]);

          if ((temp & 0xffff0000) || addr->ipv6.sin6_addr.s6_addr32[i - 1])
	  {
            snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff);
	    slen -= strlen(sptr);
	    sptr += strlen(sptr);
          }

          snprintf(sptr, slen, "%s%x", prefix, temp & 0xffff);
	  slen -= strlen(sptr);
	  sptr += strlen(sptr);
	}
      }
      else if (sptr == s)
      {
       /*
        * Empty address...
	*/

        strlcpy(s, "::", slen);
	sptr = s + 2;
	slen -= 2;
      }
      else
      {
       /*
	* Empty at end...
	*/

        strlcpy(sptr, "::", slen);
	sptr += 2;
	slen -= 2;
      }
    }
#  endif /* HAVE_GETNAMEINFO */
  }
#endif /* AF_INET6 */
  else
    strlcpy(s, "UNKNOWN", slen);

  DEBUG_printf(("httpAddrString: returning \"%s\"...\n", s));

  return (s);
}


/*
 * 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return
 *                         address records for the specified name.
 *
 * @deprecated@
 */

struct hostent *			/* O - Host entry */
httpGetHostByName(const char *name)	/* I - Hostname or IP address */
{
  const char		*nameptr;	/* Pointer into name */
  unsigned		ip[4];		/* IP address components */
  _cups_globals_t	*cg = _cupsGlobals();
  					/* Pointer to library globals */


  DEBUG_printf(("httpGetHostByName(name=\"%s\")\n", name));

 /*
  * Avoid lookup delays and configuration problems when connecting
  * to the localhost address...
  */

  if (!strcmp(name, "localhost"))
    name = "127.0.0.1";

 /*
  * This function is needed because some operating systems have a
  * buggy implementation of gethostbyname() that does not support
  * IP addresses.  If the first character of the name string is a
  * number, then sscanf() is used to extract the IP components.
  * We then pack the components into an IPv4 address manually,
  * since the inet_aton() function is deprecated.  We use the
  * htonl() macro to get the right byte order for the address.
  *
  * We also support domain sockets when supported by the underlying
  * OS...
  */

#ifdef AF_LOCAL
  if (name[0] == '/')
  {
   /*
    * A domain socket address, so make an AF_LOCAL entry and return it...
    */

    cg->hostent.h_name      = (char *)name;
    cg->hostent.h_aliases   = NULL;
    cg->hostent.h_addrtype  = AF_LOCAL;
    cg->hostent.h_length    = strlen(name) + 1;
    cg->hostent.h_addr_list = cg->ip_ptrs;
    cg->ip_ptrs[0]          = (char *)name;
    cg->ip_ptrs[1]          = NULL;

    DEBUG_puts("httpGetHostByName: returning domain socket address...");

    return (&cg->hostent);
  }
#endif /* AF_LOCAL */

  for (nameptr = name; isdigit(*nameptr & 255) || *nameptr == '.'; nameptr ++);

  if (!*nameptr)
  {
   /*
    * We have an IPv4 address; break it up and provide the host entry
    * to the caller.
    */

    if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4)
      return (NULL);			/* Must have 4 numbers */

    if (ip[0] > 255 || ip[1] > 255 || ip[2] > 255 || ip[3] > 255)
      return (NULL);			/* Invalid byte ranges! */

    cg->ip_addr = htonl(((((((ip[0] << 8) | ip[1]) << 8) | ip[2]) << 8) |
                         ip[3]));

   /*
    * Fill in the host entry and return it...
    */

    cg->hostent.h_name      = (char *)name;
    cg->hostent.h_aliases   = NULL;
    cg->hostent.h_addrtype  = AF_INET;
    cg->hostent.h_length    = 4;
    cg->hostent.h_addr_list = cg->ip_ptrs;
    cg->ip_ptrs[0]          = (char *)&(cg->ip_addr);
    cg->ip_ptrs[1]          = NULL;

    DEBUG_puts("httpGetHostByName: returning IPv4 address...");

    return (&cg->hostent);
  }
  else
  {
   /*
    * Use the gethostbyname() function to get the IPv4 address for
    * the name...
    */

    DEBUG_puts("httpGetHostByName: returning domain lookup address(es)...");

    return (gethostbyname(name));
  }
}


/*
 * 'httpGetHostname()' - Get the FQDN for the connection or local system.
 *
 * When "http" points to a connected socket, return the hostname or
 * address that was used in the call to httpConnect() or httpConnectEncrypt().
 * Otherwise, return the FQDN for the local system using both gethostname()
 * and gethostbyname() to get the local hostname with domain.
 *
 * @since CUPS 1.2@
 */

const char *				/* O - FQDN for connection or system */
httpGetHostname(http_t *http,		/* I - HTTP connection or NULL */
                char   *s,		/* I - String buffer for name */
                int    slen)		/* I - Size of buffer */
{
  struct hostent	*host;		/* Host entry to get FQDN */


  if (http)
    strlcpy(s, http->hostname, slen);
  else
  {
   /*
    * Get the hostname...
    */

    gethostname(s, slen);

    if (!strchr(s, '.'))
    {
     /*
      * The hostname is not a FQDN, so look it up...
      */

      if ((host = gethostbyname(s)) != NULL)
	strlcpy(s, host->h_name, slen);
    }
  }

 /*
  * Return the hostname with as much domain info as we have...
  */

  return (s);
}


/*
 * End of "$Id: http-addr.c 5235 2006-03-06 13:02:23Z mike $".
 */
Commit	Line	Data
	1	/*
	2	* "$Id: http-addr.c 5235 2006-03-06 13:02:23Z mike $"
	3	*
	4	* HTTP address routines for the Common UNIX Printing System (CUPS).
	5	*
	6	* Copyright 1997-2006 by Easy Software Products, all rights reserved.
	7	*
	8	* These coded instructions, statements, and computer programs are the
	9	* property of Easy Software Products and are protected by Federal
	10	* copyright law. Distribution and use rights are outlined in the file
	11	* "LICENSE.txt" which should have been included with this file. If this
	12	* file is missing or damaged please contact Easy Software Products
	13	* at:
	14	*
	15	* Attn: CUPS Licensing Information
	16	* Easy Software Products
	17	* 44141 Airport View Drive, Suite 204
	18	* Hollywood, Maryland 20636 USA
	19	*
	20	* Voice: (301) 373-9600
	21	* EMail: cups-info@cups.org
	22	* WWW: http://www.cups.org
	23	*
	24	* Contents:
	25	*
	26	* httpAddrAny() - Check for the "any" address.
	27	* httpAddrEqual() - Compare two addresses.
	28	* httpAddrLocalhost() - Check for the local loopback address.
	29	* httpAddrLookup() - Lookup the hostname associated with the address.
	30	* httpAddrString() - Convert an IP address to a dotted string.
	31	* httpGetHostByName() - Lookup a hostname or IP address, and return
	32	* address records for the specified name.
	33	* httpGetHostname() - Get the FQDN for the local system.
	34	*/
	35
	36	/*
	37	* Include necessary headers...
	38	*/
	39
	40	#include "globals.h"
	41	#include "debug.h"
	42	#include <stdlib.h>
	43	#include <stddef.h>
	44
	45
	46	/*
	47	* 'httpAddrAny()' - Check for the "any" address.
	48	*
	49	* @since CUPS 1.2@
	50	*/
	51
	52	int /* O - 1 if "any", 0 otherwise */
	53	httpAddrAny(const http_addr_t addr) / I - Address to check */
	54	{
	55	#ifdef AF_INET6
	56	if (addr->addr.sa_family == AF_INET6 &&
	57	IN6_IS_ADDR_UNSPECIFIED(&(addr->ipv6.sin6_addr)))
	58	return (1);
	59	#endif /* AF_INET6 */
	60
	61	if (addr->addr.sa_family == AF_INET &&
	62	ntohl(addr->ipv4.sin_addr.s_addr) == 0x00000000)
	63	return (1);
	64
	65	return (0);
	66	}
	67
	68
	69	/*
	70	* 'httpAddrEqual()' - Compare two addresses.
	71	*
	72	* @since CUPS 1.2@
	73	*/
	74
	75	int /* O - 1 if equal, 0 if not */
	76	httpAddrEqual(const http_addr_t addr1, / I - First address */
	77	const http_addr_t addr2) / I - Second address */
	78	{
	79	if (addr1->addr.sa_family != addr2->addr.sa_family)
	80	return (0);
	81
	82	#ifdef AF_LOCAL
	83	if (addr1->addr.sa_family == AF_LOCAL)
	84	return (!strcmp(addr1->un.sun_path, addr2->un.sun_path));
	85	#endif /* AF_LOCAL */
	86
	87	#ifdef AF_INET6
	88	if (addr1->addr.sa_family == AF_INET6)
	89	return (!memcmp(&(addr1->ipv6.sin6_addr), &(addr2->ipv6.sin6_addr), 16));
	90	#endif /* AF_INET6 */
	91
	92	return (addr1->ipv4.sin_addr.s_addr == addr2->ipv4.sin_addr.s_addr);
	93	}
	94
	95
	96	/*
	97	* 'httpAddrLength()' - Return the length of the address in bytes.
	98	*
	99	* @since CUPS 1.2@
	100	*/
	101
	102	int /* O - Length in bytes */
	103	httpAddrLength(const http_addr_t addr) / I - Address */
	104	{
	105	#ifdef AF_INET6
	106	if (addr->addr.sa_family == AF_INET6)
	107	return (sizeof(addr->ipv6));
	108	else
	109	#endif /* AF_INET6 */
	110	#ifdef AF_LOCAL
	111	if (addr->addr.sa_family == AF_LOCAL)
	112	return (offsetof(struct sockaddr_un, sun_path) +
	113	strlen(addr->un.sun_path) + 1);
	114	else
	115	#endif /* AF_LOCAL */
	116	if (addr->addr.sa_family == AF_INET)
	117	return (sizeof(addr->ipv4));
	118	else
	119	return (0);
	120
	121	}
	122
	123
	124	/*
	125	* 'httpAddrLocalhost()' - Check for the local loopback address.
	126	*
	127	* @since CUPS 1.2@
	128	*/
	129
	130	int /* O - 1 if local host, 0 otherwise */
	131	httpAddrLocalhost(
	132	const http_addr_t addr) / I - Address to check */
	133	{
	134	#ifdef AF_INET6
	135	if (addr->addr.sa_family == AF_INET6 &&
	136	IN6_IS_ADDR_LOOPBACK(&(addr->ipv6.sin6_addr)))
	137	return (1);
	138	#endif /* AF_INET6 */
	139
	140	#ifdef AF_LOCAL
	141	if (addr->addr.sa_family == AF_LOCAL)
	142	return (1);
	143	#endif /* AF_LOCAL */
	144
	145	if (addr->addr.sa_family == AF_INET &&
	146	ntohl(addr->ipv4.sin_addr.s_addr) == 0x7f000001)
	147	return (1);
	148
	149	return (0);
	150	}
	151
	152
	153	#ifdef __sgi
	154	# define ADDR_CAST (struct sockaddr *)
	155	#else
	156	# define ADDR_CAST (char *)
	157	#endif /* __sgi */
	158
	159
	160	/*
	161	* 'httpAddrLookup()' - Lookup the hostname associated with the address.
	162	*
	163	* @since CUPS 1.2@
	164	*/
	165
	166	char * /* O - Host name */
	167	httpAddrLookup(
	168	const http_addr_t addr, / I - Address to lookup */
	169	char name, / I - Host name buffer */
	170	int namelen) /* I - Size of name buffer */
	171	{
	172	DEBUG_printf(("httpAddrLookup(addr=%p, name=%p, namelen=%d)\n",
	173	addr, name, namelen));
	174
	175	/*
	176	* Range check input...
	177	*/
	178
	179	if (!addr \|\| !name \|\| namelen <= 2)
	180	{
	181	if (name && namelen >= 1)
	182	*name = '\0';
	183
	184	return (NULL);
	185	}
	186
	187	#ifdef AF_LOCAL
	188	if (addr->addr.sa_family == AF_LOCAL)
	189	strlcpy(name, addr->un.sun_path, namelen);
	190	else
	191	#endif /* AF_LOCAL */
	192	#ifdef HAVE_GETNAMEINFO
	193	{
	194	if (getnameinfo(&addr->addr, httpAddrLength(addr), name, namelen,
	195	NULL, 0, 0))
	196	{
	197	/*
	198	* If we get an error back, then the address type is not supported
	199	* and we should zero out the buffer...
	200	*/
	201
	202	name[0] = '\0';
	203
	204	return (NULL);
	205	}
	206	}
	207	#else
	208	{
	209	struct hostent host; / Host from name service */
	210
	211
	212	# ifdef AF_INET6
	213	if (addr->addr.sa_family == AF_INET6)
	214	host = gethostbyaddr(ADDR_CAST &(addr->ipv6.sin6_addr),
	215	sizeof(struct in_addr), AF_INET6);
	216	else
	217	# endif /* AF_INET6 */
	218	host = gethostbyaddr(ADDR_CAST &(addr->ipv4.sin_addr),
	219	sizeof(struct in_addr), AF_INET);
	220
	221	if (host == NULL)
	222	{
	223	/*
	224	* No hostname, so return the raw address...
	225	*/
	226
	227	httpAddrString(addr, name, namelen);
	228	return (NULL);
	229	}
	230
	231	strlcpy(name, host->h_name, namelen);
	232	}
	233	#endif /* HAVE_GETNAMEINFO */
	234
	235	return (name);
	236	}
	237
	238
	239	/*
	240	* 'httpAddrString()' - Convert an address to a numeric string.
	241	*
	242	* @since CUPS 1.2@
	243	*/
	244
	245	char * /* O - Numeric address string */
	246	httpAddrString(const http_addr_t addr, / I - Address to convert */
	247	char s, / I - String buffer */
	248	int slen) /* I - Length of string */
	249	{
	250	DEBUG_printf(("httpAddrString(addr=%p, s=%p, slen=%d)\n",
	251	addr, s, slen));
	252
	253	/*
	254	* Range check input...
	255	*/
	256
	257	if (!addr \|\| !s \|\| slen <= 2)
	258	{
	259	if (s && slen >= 1)
	260	*s = '\0';
	261
	262	return (NULL);
	263	}
	264
	265	#ifdef AF_LOCAL
	266	if (addr->addr.sa_family == AF_LOCAL)
	267	strlcpy(s, addr->un.sun_path, slen);
	268	else
	269	#endif /* AF_LOCAL */
	270	if (addr->addr.sa_family == AF_INET)
	271	{
	272	unsigned temp; /* Temporary address */
	273
	274
	275	temp = ntohl(addr->ipv4.sin_addr.s_addr);
	276
	277	snprintf(s, slen, "%d.%d.%d.%d", (temp >> 24) & 255,
	278	(temp >> 16) & 255, (temp >> 8) & 255, temp & 255);
	279	}
	280	#ifdef AF_INET6
	281	else if (addr->addr.sa_family == AF_INET6)
	282	{
	283	# ifdef HAVE_GETNAMEINFO
	284	if (getnameinfo(&addr->addr, httpAddrLength(addr), s, slen,
	285	NULL, 0, NI_NUMERICHOST))
	286	{
	287	/*
	288	* If we get an error back, then the address type is not supported
	289	* and we should zero out the buffer...
	290	*/
	291
	292	s[0] = '\0';
	293
	294	return (NULL);
	295	}
	296	# else
	297	char sptr; / Pointer into string */
	298	int i; /* Looping var */
	299	unsigned temp; /* Current value */
	300	const char prefix; / Prefix for address */
	301
	302
	303	prefix = "";
	304	for (sptr = s, i = 0; i < 4 && addr->ipv6.sin6_addr.s6_addr32[i]; i ++)
	305	{
	306	temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]);
	307
	308	snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff);
	309	prefix = ":";
	310	slen -= strlen(sptr);
	311	sptr += strlen(sptr);
	312
	313	temp &= 0xffff;
	314
	315	if (temp \|\| i == 3 \|\| addr->ipv6.sin6_addr.s6_addr32[i + 1])
	316	{
	317	snprintf(sptr, slen, "%s%x", prefix, temp);
	318	slen -= strlen(sptr);
	319	sptr += strlen(sptr);
	320	}
	321	}
	322
	323	if (i < 4)
	324	{
	325	while (i < 4 && !addr->ipv6.sin6_addr.s6_addr32[i])
	326	i ++;
	327
	328	if (i < 4)
	329	{
	330	snprintf(sptr, slen, "%s:", prefix);
	331	prefix = ":";
	332	slen -= strlen(sptr);
	333	sptr += strlen(sptr);
	334
	335	for (; i < 4; i ++)
	336	{
	337	temp = ntohl(addr->ipv6.sin6_addr.s6_addr32[i]);
	338
	339	if ((temp & 0xffff0000) \|\| addr->ipv6.sin6_addr.s6_addr32[i - 1])
	340	{
	341	snprintf(sptr, slen, "%s%x", prefix, (temp >> 16) & 0xffff);
	342	slen -= strlen(sptr);
	343	sptr += strlen(sptr);
	344	}
	345
	346	snprintf(sptr, slen, "%s%x", prefix, temp & 0xffff);
	347	slen -= strlen(sptr);
	348	sptr += strlen(sptr);
	349	}
	350	}
	351	else if (sptr == s)
	352	{
	353	/*
	354	* Empty address...
	355	*/
	356
	357	strlcpy(s, "::", slen);
	358	sptr = s + 2;
	359	slen -= 2;
	360	}
	361	else
	362	{
	363	/*
	364	* Empty at end...
	365	*/
	366
	367	strlcpy(sptr, "::", slen);
	368	sptr += 2;
	369	slen -= 2;
	370	}
	371	}
	372	# endif /* HAVE_GETNAMEINFO */
	373	}
	374	#endif /* AF_INET6 */
	375	else
	376	strlcpy(s, "UNKNOWN", slen);
	377
	378	DEBUG_printf(("httpAddrString: returning \"%s\"...\n", s));
	379
	380	return (s);
	381	}
	382
	383
	384	/*
	385	* 'httpGetHostByName()' - Lookup a hostname or IPv4 address, and return
	386	* address records for the specified name.
	387	*
	388	* @deprecated@
	389	*/
	390
	391	struct hostent * /* O - Host entry */
	392	httpGetHostByName(const char name) / I - Hostname or IP address */
	393	{
	394	const char nameptr; / Pointer into name */
	395	unsigned ip[4]; /* IP address components */
	396	_cups_globals_t *cg = _cupsGlobals();
	397	/* Pointer to library globals */
	398
	399
	400	DEBUG_printf(("httpGetHostByName(name=\"%s\")\n", name));
	401
	402	/*
	403	* Avoid lookup delays and configuration problems when connecting
	404	* to the localhost address...
	405	*/
	406
	407	if (!strcmp(name, "localhost"))
	408	name = "127.0.0.1";
	409
	410	/*
	411	* This function is needed because some operating systems have a
	412	* buggy implementation of gethostbyname() that does not support
	413	* IP addresses. If the first character of the name string is a
	414	* number, then sscanf() is used to extract the IP components.
	415	* We then pack the components into an IPv4 address manually,
	416	* since the inet_aton() function is deprecated. We use the
	417	* htonl() macro to get the right byte order for the address.
	418	*
	419	* We also support domain sockets when supported by the underlying
	420	* OS...
	421	*/
	422
	423	#ifdef AF_LOCAL
	424	if (name[0] == '/')
	425	{
	426	/*
	427	* A domain socket address, so make an AF_LOCAL entry and return it...
	428	*/
	429
	430	cg->hostent.h_name = (char *)name;
	431	cg->hostent.h_aliases = NULL;
	432	cg->hostent.h_addrtype = AF_LOCAL;
	433	cg->hostent.h_length = strlen(name) + 1;
	434	cg->hostent.h_addr_list = cg->ip_ptrs;
	435	cg->ip_ptrs[0] = (char *)name;
	436	cg->ip_ptrs[1] = NULL;
	437
	438	DEBUG_puts("httpGetHostByName: returning domain socket address...");
	439
	440	return (&cg->hostent);
	441	}
	442	#endif /* AF_LOCAL */
	443
	444	for (nameptr = name; isdigit(nameptr & 255) \|\| nameptr == '.'; nameptr ++);
	445
	446	if (!*nameptr)
	447	{
	448	/*
	449	* We have an IPv4 address; break it up and provide the host entry
	450	* to the caller.
	451	*/
	452
	453	if (sscanf(name, "%u.%u.%u.%u", ip, ip + 1, ip + 2, ip + 3) != 4)
	454	return (NULL); /* Must have 4 numbers */
	455
	456	if (ip[0] > 255 \|\| ip[1] > 255 \|\| ip[2] > 255 \|\| ip[3] > 255)
	457	return (NULL); /* Invalid byte ranges! */
	458
	459	cg->ip_addr = htonl(((((((ip[0] << 8) \| ip[1]) << 8) \| ip[2]) << 8) \|
	460	ip[3]));
	461
	462	/*
	463	* Fill in the host entry and return it...
	464	*/
	465
	466	cg->hostent.h_name = (char *)name;
	467	cg->hostent.h_aliases = NULL;
	468	cg->hostent.h_addrtype = AF_INET;
	469	cg->hostent.h_length = 4;
	470	cg->hostent.h_addr_list = cg->ip_ptrs;
	471	cg->ip_ptrs[0] = (char *)&(cg->ip_addr);
	472	cg->ip_ptrs[1] = NULL;
	473
	474	DEBUG_puts("httpGetHostByName: returning IPv4 address...");
	475
	476	return (&cg->hostent);
	477	}
	478	else
	479	{
	480	/*
	481	* Use the gethostbyname() function to get the IPv4 address for
	482	* the name...
	483	*/
	484
	485	DEBUG_puts("httpGetHostByName: returning domain lookup address(es)...");
	486
	487	return (gethostbyname(name));
	488	}
	489	}
	490
	491
	492	/*
	493	* 'httpGetHostname()' - Get the FQDN for the connection or local system.
	494	*
	495	* When "http" points to a connected socket, return the hostname or
	496	* address that was used in the call to httpConnect() or httpConnectEncrypt().
	497	* Otherwise, return the FQDN for the local system using both gethostname()
	498	* and gethostbyname() to get the local hostname with domain.
	499	*
	500	* @since CUPS 1.2@
	501	*/
	502
	503	const char * /* O - FQDN for connection or system */
	504	httpGetHostname(http_t http, / I - HTTP connection or NULL */
	505	char s, / I - String buffer for name */
	506	int slen) /* I - Size of buffer */
	507	{
	508	struct hostent host; / Host entry to get FQDN */
	509
	510
	511	if (http)
	512	strlcpy(s, http->hostname, slen);
	513	else
	514	{
	515	/*
	516	* Get the hostname...
	517	*/
	518
	519	gethostname(s, slen);
	520
	521	if (!strchr(s, '.'))
	522	{
	523	/*
	524	* The hostname is not a FQDN, so look it up...
	525	*/
	526
	527	if ((host = gethostbyname(s)) != NULL)
	528	strlcpy(s, host->h_name, slen);
	529	}
	530	}
	531
	532	/*
	533	* Return the hostname with as much domain info as we have...
	534	*/
	535
	536	return (s);
	537	}
	538
	539
	540	/*
	541	* End of "$Id: http-addr.c 5235 2006-03-06 13:02:23Z mike $".
	542	*/