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* ipaddresses : add validCIDR, validIPv4CIDR, validIPv6CIDR to check the CIDR

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* ipaddresses : add compressIP to compress an IPv6 address (remove the 0 and add the :: if possible)
* ipaddresses : add networkFirstIP and networkLastIP to get the first and last address of a network. In IPv4, the first address is network address and the last address is broadcast address.
* ipaddresses : add ipInNetwork to know if the provided ip address is in or outside the network and cidr provided


git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@4026 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
This commit is contained in:
Dominique Fournier
2018-01-10 14:34:35 +00:00
parent 20e75710c9
commit e12f7c516d
2 changed files with 507 additions and 3 deletions
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263
ipaddresses.php
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@@ -49,18 +49,125 @@ class ipaddresses
return TRUE;
}
/** Return true if the provided CIDR is valid. The CIDR can be valid in IPv4
* or IPv6
* @param integer $cidr The CIDR to test
* @return boolean The CIDR is valid
*/
public function validCIDR ($cidr)
{
if (! is_integer ($cidr))
throw new \Exception (dgettext("domframework", "Invalid CIDR provided"),
500);
if ($cidr < 0 || $cidr > 128)
return false;
return true;
}
/** Return true if the provided CIDR is valid. The CIDR can be valid in IPv4.
* @param integer $cidr The CIDR to test
* @return boolean The CIDR is valid
*/
public function validIPv4CIDR ($cidr)
{
if (! is_integer ($cidr))
throw new \Exception (dgettext("domframework", "Invalid CIDR provided"),
500);
if ($cidr < 0 || $cidr > 32)
return false;
return true;
}
/** Return true if the provided CIDR is valid. The CIDR can be valid in IPv6.
* @param integer $cidr The CIDR to test
* @return boolean The CIDR is valid
*/
public function validIPv6CIDR ($cidr)
{
if (! is_integer ($cidr))
throw new \Exception (dgettext("domframework", "Invalid CIDR provided"),
500);
if ($cidr < 0 || $cidr > 128)
return false;
return true;
}
/** Return the IPv6 to compressed form.
* Remove the 0 when they are placed on the begin of the nibble.
* Remove all the blocks only zero to convert them to :: (but only one time)
* Example: 2001:0660:530d:0201:0000:0000:0000:0124 => 2001:660:530d:201::124
* If an IPv4 is provided, return it without modification
*/
public function compressIP ($ip)
{
if (strpos ($ip, ":") === false)
return $ip;
$ip = $this->uncompressIPv6 ($ip);
$ipArr = explode (":", $ip);
if (count ($ipArr) !== 8)
return $ip;
// Remove the 0 if they are at the beginning of the nibble
foreach ($ipArr as &$ip)
{
$ip = sprintf ("%x", hexdec ($ip));
}
// Remove the 0 nibble if there is an other 0 nibble after
$cleanLoop = false;
$ipCompArr = array ();
foreach ($ipArr as $key=>$val)
{
// echo "VAL=".var_export ($val, true).
// ", cleanLoop=".var_export ($cleanLoop,true);
if ($val !== "0")
{
// echo " => In NOT zero\n";
if ($cleanLoop)
$cleanLoop = false;
}
elseif($cleanLoop)
{
// echo " => In CleanLoop\n";
unset ($ipArr[$key]);
}
else
{
// echo " => In ZERO\n";
if (key_exists ($key+1, $ipArr) && $ipArr[$key+1] === "0")
{
// echo " ===> NEXT ZERO : CleanLoop Start\n";
$cleanLoop = true;
$ipArr[$key] = "";
}
}
}
$ipArr = array_values ($ipArr);
if (end ($ipArr) === "")
{
array_pop ($ipArr);
$ipArr[] = ":";
}
if (reset ($ipArr) === "")
$ipArr[0] = ":";
if (count ($ipArr) === 1)
$ipArr[] = "";
$ipHex = implode (":", $ipArr);
return $ipHex;
}
/** Return the IPv6 uncompressed (all the fields exists). They are not filled
* by zeros
* If the provided IP is IPv4, there is no change applied
* Return False if the parameter is invalid
* Based on http://www.weberdev.com/get_example.php3?ExampleID=3921
* @param string $ip The IP address to uncompress
* Example : $ip="::" => return "0:0:0:0:0:0:0:0"
*/
public function uncompressIPv6 ($ip)
{
if (! is_string ($ip) || $ip === "")
if (! is_string ($ip) || $ip === "" ||
$this->validIPAddress ($ip) === false)
throw new \Exception (dgettext("domframework", "Invalid IP address"),
500);
500);
if (strstr ($ip,"::"))
{
$e = explode (":", $ip);
@@ -84,6 +191,8 @@ class ipaddresses
}
}
$ip = implode (":", $newipv6);
if (substr_count ($ip, ":") !== 7)
throw new \Exception ("uncompressIPv6: Invalid IP provided", 500);
}
return $ip;
}
@@ -120,6 +229,8 @@ class ipaddresses
* Valid only on IPv6 (but don't change anything if the provided address is
* IPv4)
* @param string $ip The IP to complete
* @return string The address in nibbles
* Example : $ip = "::", return "0000:0000:0000:0000:0000:0000:0000:0000"
*/
public function completeAddressWithZero ($ip)
{
@@ -273,4 +384,152 @@ class ipaddresses
}
return $i;
}
/** This function return true if the provided address is in the provided
* network with the associated cidr
* @param string $ip The IPv4 or IPv6 to test
* @param string $network The IPv4 or IPv6 network base
* @param string $cidr The CIDR to apply
* @return boolean True if $ip is in $network/$cidr
*/
public function ipInNetwork ($ip, $network, $cidr)
{
if ($this->validIPAddress ($ip) === false)
throw new \Excpetion (dgettext("domframework", "Invalid IP address"),
500);
if ($this->validIPAddress ($network) === false)
throw new \Excpetion (dgettext("domframework", "Invalid Network address"),
500);
$ipv4 = $this->validIPv4Address ($ip);
$networkv4 = $this->validIPv4Address ($network);
if ($ipv4 !== $networkv4)
throw new \Exception (dgettext("domframework",
"Network and IP address are not compatible"), 500);
if ($ipv4 === true)
{
if ($this->validIPv4CIDR ($cidr) === false)
throw new \Exception (dgettext("domframework",
"CIDR is not IPv4 compatible"), 500);
}
else
{
if ($this->validIPv6CIDR ($cidr) === false)
throw new \Exception (dgettext("domframework",
"CIDR is not IPv6 compatible"), 500);
}
return ($this->networkFirstIP ($ip, $cidr) ===
$this->networkFirstIP ($network, $cidr));
}
/** Get the first IP of a network.
* IPv4 and IPv6 compatible
* @param string $ip The IPv4 or IPv6 in the network
* @param string $cidr The CIDR to apply
* @return string the network base
* Example : $ip="192.168.1.2", $cidr=24 => return "192.168.1.0"
*/
public function networkFirstIP ($ip, $cidr)
{
return $this->networkFirstLastIP ($ip, $cidr, "0");
}
/** Get the last IP of a network.
* IPv4 and IPv6 compatible
* @param string $ip The IPv4 or IPv6 in the network
* @param string $cidr The CIDR to apply
* @return string the network base
* Example : $ip="192.168.1.2", $cidr=24 => return "192.168.1.255"
*/
public function networkLastIP ($ip, $cidr)
{
return $this->networkFirstLastIP ($ip, $cidr, "1");
}
/** Get the network first IP.
* IPv4 and IPv6 compatible
* @param string $ip The IPv4 or IPv6 in the network
* @param string $cidr The CIDR to apply
* @param string $map if "0", get the first address of the network,
* if "1" get the last address of the network
* @return string the network base
* Example : $ip="192.168.1.2", $cidr=24 => return "192.168.1.0"
*/
private function networkFirstLastIP ($ip, $cidr, $map)
{
if ($this->validIPAddress ($ip) === false)
throw new \Excpetion (dgettext("domframework", "Invalid IP address"),
500);
$ipv4 = $this->validIPv4Address ($ip);
if ($ipv4 === true)
{
if ($this->validIPv4CIDR ($cidr) === false)
throw new \Exception (dgettext("domframework",
"CIDR is not IPv4 compatible"), 500);
}
else
{
if ($this->validIPv6CIDR ($cidr) === false)
throw new \Exception (dgettext("domframework",
"CIDR is not IPv6 compatible"), 500);
}
// Convert the IP and CIDR to binary string
if ($ipv4)
{
list ($ip1, $ip2, $ip3, $ip4) = explode (".", $ip);
$ipBin = sprintf ("%08b%08b%08b%08b", $ip1, $ip2, $ip3, $ip4);
$cidrBin = "";
for ($i = 0 ; $i < $cidr ; $i++)
$cidrBin .= "1";
for ($i = $cidr ; $i < 32 ; $i++)
$cidrBin .= "0";
}
else
{
$ip = $this->completeAddressWithZero ($ip);
$ip = str_replace (":", "", $ip);
$ipArr = str_split ($ip, 2);
$ipBin = "";
foreach ($ipArr as $ip)
$ipBin .= sprintf ("%08b", hexdec ($ip));
$cidrBin = "";
for ($i = 0 ; $i < $cidr ; $i++)
$cidrBin .= "1";
for ($i = $cidr ; $i < 128 ; $i++)
$cidrBin .= "0";
}
// Get the binary value of IP if the mask is 1 or put $map if the mask is 0
$ipBaseBin = "";
for ($i = 0 ; $i < strlen ($ipBin) ; $i++)
{
if ($cidrBin[$i] === "1")
$ipBaseBin .= $ipBin[$i];
else
$ipBaseBin .= "$map";
}
// Convert ipBaseBin from binary to decimal if IPv4 and to hexa for IPv6
if ($ipv4)
{
$ipBase = "";
for ($i = 0 ; $i < 32 ; $i = $i + 8)
{
$block = substr ($ipBaseBin, $i, 8);
if ($i > 0)
$ipBase .= ".";
$ipBase .= bindec ($block);
}
}
else
{
$ipBase = "";
for ($i = 0 ; $i < 128 ; $i = $i + 8)
{
$block = substr ($ipBaseBin, $i, 8);
if ($i > 0 && $i % 16 == 0)
$ipBase .= ":";
$ipBase .= sprintf ("%02x", bindec ($block));
}
$ipBase = $this->compressIP ($ipBase);
}
return $ipBase;
}
}