Function if

cups/http-addr.c:543–643

  }
#ifdef AF_INET6
  else if (addr->addr.sa_family == AF_INET6)
  {
    char	*sptr,			/* Pointer into string */
		temps[64];		/* Temporary string for address */

#  ifdef HAVE_GETNAMEINFO
    if (getnameinfo(&addr->addr, (socklen_t)httpAddrLength(addr), temps, sizeof(temps), 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 if ((sptr = strchr(temps, '%')) != NULL)
    {
     /*
      * Convert "%zone" to "+zone" to match URI form...
      */

      *sptr = '+';
    }

#  else
    int		i;			/* Looping var */
    unsigned	temp;			/* Current value */
    const char	*prefix;		/* Prefix for address */


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

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

      temp &= 0xffff;

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

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

      if (i < 4)
      {
        snprintf(sptr, sizeof(temps) - (size_t)(sptr - temps), "%s:", prefix);