ncurses_wvline
That function return ip ranges
<?php
function iprange($ip,$mask=24,$return_array=FALSE) {
$corr=(pow(2,32)-1)-(pow(2,32-$mask)-1);
$first=ip2long($ip) & ($corr);
$length=pow(2,32-$mask)-1;
if (!$return_array) {
return array(
'first'=>$first,
'size'=>$length+1,
'last'=>$first+$length,
'first_ip'=>long2ip($first),
'last_ip'=>long2ip($first+$length)
);
}
$ips=array();
for ($i=0;$i<=$length;$i++) {
$ips[]=long2ip($first+$i);
}
return $ips;
}
$test1=iprange('192.168.5.12',18);
$test2=iprange('192.168.1.12',28,TRUE);
echo print_r($test1,1)."\n".print_r($test2,1)."\n";
----------------
<?
Array
(
[first] => 3232235520
[size] => 16384
[last] => 3232251903
[first_ip] => 192.168.0.0
[last_ip] => 192.168.63.255
)
Array
(
[0] => 192.168.1.0
[1] => 192.168.1.1
[2] => 192.168.1.2
[3] => 192.168.1.3
[4] => 192.168.1.4
[5] => 192.168.1.5
[6] => 192.168.1.6
[7] => 192.168.1.7
[8] => 192.168.1.8
[9] => 192.168.1.9
[10] => 192.168.1.10
[11] => 192.168.1.11
[12] => 192.168.1.12
[13] => 192.168.1.13
[14] => 192.168.1.14
[15] => 192.168.1.15
)
?>
XCV. Network Functions
Wymagania
Do zbudowania tego rozszerzenia nie są wymagane żadne zewnętrzne biblioteki.
Instalacja
By używać tych funkcji, nie trzeba niczego instalować. Są one częścią jądra PHP.
Konfiguracja czasu wykonywania
Na działanie tych funcji wpływają ustawienia zawarte w pliku php.ini.
Tabela 1. Network Configuration Options
| Name | Default | Changeable | Changelog |
|---|---|---|---|
| define_syslog_variables | "0" | PHP_INI_ALL |
Oto krótkie wyjaśnienie dyrektyw konfiguracji.
- define_syslog_variables boolean
Whether or not to define the various syslog variables (e.g. $LOG_PID, $LOG_CRON, etc.). Turning it off is a good idea performance-wise. At runtime, you can define these variables by calling define_syslog_variables().
Typy zasobów
To rozszerzenie nie posiada żadnych rodzajów zasobów.
Stałe predefinopwane
Poniższe stałe są częścią jądra PHP a więc są zawsze widoczne.
Tabela 2. openlog() Options
| Constant | Description |
|---|---|
| LOG_CONS | if there is an error while sending data to the system logger, write directly to the system console |
| LOG_NDELAY | open the connection to the logger immediately |
| LOG_ODELAY | (default) delay opening the connection until the first message is logged |
| LOG_NOWAIT | |
| LOG_PERROR | print log message also to standard error |
| LOG_PID | include PID with each message |
Tabela 3. openlog() Facilities
| Constant | Description |
|---|---|
| LOG_AUTH | security/authorization messages (use LOG_AUTHPRIV instead in systems where that constant is defined) |
| LOG_AUTHPRIV | security/authorization messages (private) |
| LOG_CRON | clock daemon (cron and at) |
| LOG_DAEMON | other system daemons |
| LOG_KERN | kernel messages |
| LOG_LOCAL0 ... LOG_LOCAL7 | reserved for local use, these are not available in Windows |
| LOG_LPR | line printer subsystem |
| LOG_MAIL | mail subsystem |
| LOG_NEWS | USENET news subsystem |
| LOG_SYSLOG | messages generated internally by syslogd |
| LOG_USER | generic user-level messages |
| LOG_UUCP | UUCP subsystem |
Tabela 4. syslog() Priorities (in descending order)
| Constant | Description |
|---|---|
| LOG_EMERG | system is unusable |
| LOG_ALERT | action must be taken immediately |
| LOG_CRIT | critical conditions |
| LOG_ERR | error conditions |
| LOG_WARNING | warning conditions |
| LOG_NOTICE | normal, but significant, condition |
| LOG_INFO | informational message |
| LOG_DEBUG | debug-level message |
Tabela 5. dns_get_record() Options
| Constant | Description |
|---|---|
| DNS_A | IPv4 Address Resource |
| DNS_MX | Mail Exchanger Resource |
| DNS_CNAME | Alias (Canonical Name) Resource |
| DNS_NS | Authoritative Name Server Resource |
| DNS_PTR | Pointer Resource |
| DNS_HINFO | Host Info Resource (See IANA's Operating System Names for the meaning of these values) |
| DNS_SOA | Start of Authority Resource |
| DNS_TXT | Text Resource |
| DNS_ANY | Any Resource Record. On most systems this returns all resource records, however it should not be counted upon for critical uses. Try DNS_ALL instead. |
| DNS_AAAA | IPv6 Address Resource |
| DNS_ALL | Iteratively query the name server for each available record type. |
- Spis treści
- checkdnsrr -- Check DNS records corresponding to a given Internet host name or IP address
- closelog -- Close connection to system logger
- debugger_off -- Disable internal PHP debugger (PHP 3)
- debugger_on -- Enable internal PHP debugger (PHP 3)
- define_syslog_variables -- Initializes all syslog related constants
- dns_check_record -- Synonym for checkdnsrr()
- dns_get_mx -- Synonym for getmxrr()
- dns_get_record -- Fetch DNS Resource Records associated with a hostname
- fsockopen -- Open Internet or Unix domain socket connection
- gethostbyaddr -- Get the Internet host name corresponding to a given IP address
- gethostbyname -- Get the IP address corresponding to a given Internet host name
- gethostbynamel -- Get a list of IP addresses corresponding to a given Internet host name
- getmxrr -- Get MX records corresponding to a given Internet host name
- getprotobyname -- Get protocol number associated with protocol name
- getprotobynumber -- Get protocol name associated with protocol number
- getservbyname -- Get port number associated with an Internet service and protocol
- getservbyport -- Get Internet service which corresponds to port and protocol
- inet_ntop -- Converts a packed internet address to a human readable representation
- inet_pton -- Converts a human readable IP address to its packed in_addr representation
- ip2long -- Converts a string containing an (IPv4) Internet Protocol dotted address into a proper address
- long2ip -- Converts an (IPv4) Internet network address into a string in Internet standard dotted format
- openlog -- Open connection to system logger
- pfsockopen -- Open persistent Internet or Unix domain socket connection
- socket_get_status -- Alias dla stream_get_meta_data()
- socket_set_blocking -- Alias dla stream_set_blocking()
- socket_set_timeout -- Alias dla stream_set_timeout()
- syslog -- Generate a system log message
add a note
User Contributed Notes
Network Functions
eicto@NOSPAM
15-Mar-2012 10:37
David GASTALDIN
21-Jun-2007 08:12
Here a IP-Range to CIDRs function that I wrote for the purpose of filling my Postfix client.cidr with ripe-ncc data to block spamming from useless countries. Strcmp functions are meant to work around the silly PHP string comparison which inevitably tries compare strings as numbers when possible. I'll make no comment about that fact ... bit I have to bite my tong hard :
function PlageVersCIDRs($ip_min, $ip_max) {
$cidrs = array();
$ip_min_bin = sprintf('%032b', $ip_min);
$ip_max_bin = sprintf('%032b', $ip_max);
$ip_cour_bin = $ip_min_bin;
while (strcmp($ip_cour_bin, $ip_max_bin) <= 0) {
$lng_reseau = 32;
$ip_reseau_bin = $ip_cour_bin;
while (($ip_cour_bin[$lng_reseau - 1] == '0') && (strcmp(substr_replace($ip_reseau_bin, '1', $lng_reseau - 1, 1), $ip_max_bin) <= 0)) {
$ip_reseau_bin[$lng_reseau - 1] = '1';
$lng_reseau--;
}
$cidrs[] = long2ip(bindec($ip_cour_bin)).'/'.$lng_reseau;
$ip_cour_bin = sprintf('%032b', bindec($ip_reseau_bin) + 1);
}
return $cidrs;
}
claudiu at cnixs dot com
22-Apr-2007 02:52
A simple and very fast function to check against CIDR.
Your previous examples are too complicated and involves a lot of functions call.
Here it is (only with arithmetic operators and call only to ip2long () and split() ):
<?php
function ipCIDRCheck ($IP, $CIDR) {
list ($net, $mask) = split ("/", $CIDR);
$ip_net = ip2long ($net);
$ip_mask = ~((1 << (32 - $mask)) - 1);
$ip_ip = ip2long ($IP);
$ip_ip_net = $ip_ip & $ip_mask;
return ($ip_ip_net == $ip_net);
}
?>
call example: <?php echo ipCheck ("192.168.1.23", "192.168.1.0/24"); ?>
dand at ddchosting.com
08-Apr-2006 02:28
When I was working on a project I ran into this problem with redirecting. My solution is as follows:
header("Refresh: 5; url=../main/main.php?".session_id()."");
This allowed me to pass the session_id() which is used throughout site to make sure user has loged in.
I hope this helps!
metator at netcabo dot pt
28-Jul-2005 07:34
Ups. The function has a bug, though the example still works with it. Just replace the $_POST variables by the function parameters.
<?
function isIPIn($ip, $net, $mask) {
//doesn't check for the return value of ip2long
$ip = ip2long($ip);
$rede = ip2long($net);
$mask = ip2long($mask);
//AND
$res = $ip & $mask;
return ($res == $rede);
}
?>
metator at netcabo dot pt
27-Jul-2005 08:22
Regarding samuele's note:
You can get faster code if you apply directly what happens in network devices, such as routers. If you AND (logic operation) the remote ip against the local netmask the result will be the network ip if the remote ip is from the local network. Example:
192.168.0.16 = 11000000.10101000.00000000.00010000
& 255.255.255.0 = 11111111.11111111.11111111.00000000
--------------------------------------------------------------
192.168.0.0 = 11000000.10101000.00000000.00000000
And now the code. My example uses a html form where you place the values you want to test:
<HTML><HEAD><TITLE>Check IP</TITLE>
</HEAD><BODY>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="POST">
Hope you find this useful.
IP to check: <input type="text" name="ip"> <br>
Local network ip: <input type="text" name="net"> <br>
Local netmask: <input type="text" name="mask"> <br>
<input type="submit" name="check" value="Check it!">
</form>
<?php
/**
* @param string $ip IP to check in dotted decimal format
* @param string $net Network IP in dotted decimal format
* @param string $mask Netmask in dotted decimal format
* @returns true if the ip belongs to the network, false otherwise
**/
function isIPIn($ip, $net, $mask) {
//doesn't check for the return value of ip2long
$ip = ip2long($_POST['ip']);
$rede = ip2long($_POST['net']);
$mask = ip2long($_POST['mask']);
//AND
$res = $ip & $mask;
return ($res == $rede);
}
if (isset($_POST['check'])) {
echo isIPIn($_POST['ip'], $_POST['net'], $_POST['mask']) ? "IP IN.": "IP OUT.";
}
?>
</BODY><HTML>
nexxer at rogers dot com
24-Feb-2005 05:16
In Trevor Hemsley's translation of the perl range2cidr function, the
while ($end > $start)
condition should be
while ($end >= $start)
otherwise it won't work for /32s, ie if you feed range2cidr("1.2.3.4", "1.2.3.4").
-- nex
samuele at norsam dot org
25-Nov-2003 09:01
To find if an IP is in a net/mask (very fast):
<?php
function isIPIn($ip,$net,$mask) {
$lnet=ip2long($net);
$lip=ip2long($ip);
$binnet=str_pad( decbin($lnet),32,"0","STR_PAD_LEFT" );
$firstpart=substr($binnet,0,$mask);
$binip=str_pad( decbin($lip),32,"0","STR_PAD_LEFT" );
$firstip=substr($binip,0,$mask);
return(strcmp($firstpart,$firstip)==0);
}
?>
This function can be compacted, avoiding some variable settings, but the function will not be too clear to read...
Example code, used to made a kind of location service network-based:
<?php
$n = array ( "192.168.0.0/16" => "TUSCANY",
"192.168.1.0/24" => "- Florence",
"192.168.2.0/24" => "- Pisa",
"192.168.3.0/24" => "- Siena",
"192.168.64.0/21" => "- Tuscan Archipelago",
"192.168.64.0/23" => "--- Elba Island",
"192.168.66.0/24" => "--- Capraia Island",
"192.168.67.0/24" => "--- Giannutri Island");
// Normally you should use the following line
$myip = $HTTP_SERVER_VARS['REMOTE_ADDR'];
// This is first example: returns Tuscany/Pisa
$myip = "192.168.2.33";
// This is second example: returns Tuscany/T.Arch./Elba
$myip = "192.168.65.34";
echo "Your position:<br />\n";
foreach ( $n as $k=>$v ) {
list($net,$mask)=split("/",$k);
if (isIPIn($myip,$net,$mask)) {
echo $n[$k]."<br />\n"; }
}
?>
and so on...
anderson at piq dot com dot br
06-Aug-2003 10:10
If you want to get the interface of an IP, based on the local route table, use this.
function GetIfaceforIP($user_ip)
{
$route = "/bin/netstat -rn";
exec($route, $aoutput);
foreach($aoutput as $key => $line)
{
if($key > 1)
{
$line = ereg_replace("[[:space:]]+",",",$line);
list($network, $gateway, $mask, $flags, $mss, $window, $irtt, $iface) = explode(",", $line)
if((ip2long($user_ip) & ip2long($mask)) == ip2long($network))
{
return $iface;
}
}
}
}
02-Apr-2003 08:11
Alternative cidr_conv function - a little easier to follow
function cidr_conv($cidr_address) {
$first = substr($cidr_address, 0, strpos($cidr_address, "/"));
$netmask = substr(strstr($cidr_address, "/"), 1);
$first_bin = str_pad(decbin(ip2long($first)), 32, "0", STR_PAD_LEFT);
$netmask_bin = str_pad(str_repeat("1", (integer)$netmask), 32, "0", STR_PAD_RIGHT);
for ($i = 0; $i < 32; $i++) {
if ($netmask_bin[$i] == "1")
$last_bin .= $first_bin[$i];
else
$last_bin .= "1";
}
$last = long2ip(bindec($last_bin));
return "$first - $last";
}
trevor-hemsley at nospam dot dial dot pipex dot com
16-Oct-2002 11:53
Previous example of IP range to CIDR list does not cope with ranges as well as the perl Net::Netmask range2cidrlist() function. In PHP this looks like
<?
function imask($this)
{
// use base_convert not dechex because dechex is broken and returns 0x80000000 instead of 0xffffffff
return base_convert((pow(2,32) - pow(2, (32-$this)))), 10, 16);
}
function imaxblock($ibase, $tbit)
{
while ($tbit > 0)
{
$im = hexdec(imask($tbit-1));
$imand = $ibase & $im;
if ($imand != $ibase)
{
break;
}
$tbit--;
}
return $tbit;
}
function range2cidrlist($istart, $iend)
{
// this function returns an array of cidr lists that map the range given
$s = explode(".", $istart);
// PHP ip2long does not handle leading zeros on IP addresses! 172.016 comes back as 172.14, seems to be treated as octal!
$start = "";
$dot = "";
while (list($key,$val) = each($s))
{
$start = sprintf("%s%s%d",$start,$dot,$val);
$dot = ".";
}
$end = "";
$dot = "";
$e = explode(".",$iend);
while (list($key,$val) = each($e))
{
$end = sprintf("%s%s%d",$end,$dot,$val);
$dot = ".";
}
$start = ip2long($start);
$end = ip2long($end);
$result = array();
while ($end > $start)
{
$maxsize = imaxblock($start,32);
$x = log($end - $start + 1)/log(2);
$maxdiff = floor(32 - floor($x));
$ip = long2ip($start);
if ($maxsize < $maxdiff)
{
$maxsize = $maxdiff;
}
array_push($result,"$ip/$maxsize");
$start += pow(2, (32-$maxsize));
}
return $result;
}
?>
philippe-at-cyberabuse.org
12-Oct-2002 03:49
... and this one will do the opposite (o return NULL for invalid netblocks) :
1.0.0.0 1.0.255.255 -> 1.0.0.0/16
1.0.0.0 1.3.255.255 -> 1.0.0.0/14
192.168.0.0 192.168.0.255 -> 192.168.0.0/24
function ip2cidr($ip_start,$ip_end) {
if(long2ip(ip2long($ip_start))!=$ip_start or long2ip(ip2long($ip_end))!=$ip_end) return NULL;
$ipl_start=(int)ip2long($ip_start);
$ipl_end=(int)ip2long($ip_end);
if($ipl_start>0 && $ipl_end<0) $delta=($ipl_end+4294967296)-$ipl_start;
else $delta=$ipl_end-$ipl_start;
$netmask=str_pad(decbin($delta),32,"0","STR_PAD_LEFT");
if(ip2long($ip_start)==0 && substr_count($netmask,"1")==32) return "0.0.0.0/0";
if($delta<0 or ($delta>0 && $delta%2==0)) return NULL;
for($mask=0;$mask<32;$mask++) if($netmask[$mask]==1) break;
if(substr_count($netmask,"0")!=$mask) return NULL;
return "$ip_start/$mask";
}
philippe-at-cyberabuse.org
14-Dec-2001 07:46
PHP miss CIDR functions.
This one will convert a CIDR like this:
0.0.0.0/16 -> 0.0.0.0 - 0.0.255.255
127.0/16 -> 127.0.0.0 - 127.0.255.255
etc...
function cidrconv($net) {
$start=strtok($net,"/");
$n=3-substr_count($net, ".");
if ($n>0) { for ($i=$n;$i>0;$i--) $start.=".0"; }
$bits1=str_pad(decbin(ip2long($start)),32,"0","STR_PAD_LEFT");
$net=pow(2,(32-substr(strstr($net,"/"),1)))-1;
$bits2=str_pad(decbin($net),32,"0","STR_PAD_LEFT");
for ($i=0;$i<32;$i++) {
if ($bits1[$i]==$bits2[$i]) $final.=$bits1[$i];
if ($bits1[$i]==1 and $bits2[$i]==0) $final.=$bits1[$i];
if ($bits1[$i]==0 and $bits2[$i]==1) $final.=$bits2[$i];
}
return $start." - ".long2ip(bindec($final));
}