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ipaddresses : Add cidr2netmask method for IPv4 masks

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git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@5989 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
This commit is contained in:
Dominique Fournier
2020-05-11 20:29:13 +00:00
parent 4a478ae9f1
commit cf4c92b7bf
2 changed files with 69 additions and 0 deletions
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34
Tests/ipaddressesTest.php
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@@ -396,6 +396,40 @@ class ipaddressesTest extends PHPUnit_Framework_TestCase
$this->assertSame (0, $res); $this->assertSame (0, $res);
} }
public function test_cidr2netmask_1 ()
{
$i = new ipaddresses ();
$res = $i->cidr2netmask (0, true);
$this->assertSame ("0.0.0.0", $res);
}
public function test_cidr2netmask_2 ()
{
$i = new ipaddresses ();
$res = $i->cidr2netmask (24, true);
$this->assertSame ("255.255.255.0", $res);
}
public function test_cidr2netmask_3 ()
{
$i = new ipaddresses ();
$res = $i->cidr2netmask (25, true);
$this->assertSame ("255.255.255.128", $res);
}
public function test_cidr2netmask_4 ()
{
$i = new ipaddresses ();
$res = $i->cidr2netmask (32, true);
$this->assertSame ("255.255.255.255", $res);
}
public function test_cidr2netmask_5 ()
{
$i = new ipaddresses ();
$res = $i->cidr2netmask (1, true);
$this->assertSame ("128.0.0.0", $res);
}
public function test_ipInNetwork1 () public function test_ipInNetwork1 ()
{ {
$i = new ipaddresses (); $i = new ipaddresses ();

35
ipaddresses.php
View File

@@ -521,6 +521,41 @@ class ipaddresses
} }
// }}} // }}}
/** This function return the netmask associated to a CIDR.
* Work only on IPv4 addresses (CIDR between 0 and 32)
* @param string $cidr The CIDR to convert in netmask
* @param boolean|null $maskdirect If true return a direct mask, if false
* return a wildcard mask
* @return the mask
* @return false if the CIDR is not between 0 and 32
*/
public function cidr2netmask ($cidr, $maskdirect = true)
// {{{
{
if ($cidr < 0 || $cidr > 32)
return false;
$maskdirect = "". ($maskdirect + 0);
$maskrevert = ($maskdirect === "0") ? "1" : "0";
$bin = "";
for ($i = 0 ; $i < 32 ; $i++)
{
if ($i < $cidr)
$bin .= $maskdirect;
else
$bin .= $maskrevert;
}
$res = "";
for ($i = 0 ; $i < 32 ; $i = $i + 8)
{
$block = substr ($bin, $i, 8);
if ($i > 0)
$res .= ".";
$res .= bindec ($block);
}
return $res;
}
// }}}
/** This function return true if the provided address is in the provided /** This function return true if the provided address is in the provided
* network with the associated cidr * network with the associated cidr
* @param string $ip The IPv4 or IPv6 to test * @param string $ip The IPv4 or IPv6 to test