|
|
 |
LXVI. Funzioni di rete- Sommario
- checkdnsrr --
Controlla i record DNS relativi ad un host Internet o
indirizzo IP
- closelog -- Chiude la connessione al logger di sistema
- debugger_off -- Disattiva il debugger interno PHP
- debugger_on -- Attiva il debugger interno PHP
- define_syslog_variables -- Inizializza tutte le costanti collegate al syslog
- dns_check_record -- Synonym for checkdnsrr()
- dns_get_mx -- Synonym for getmxrr()
- dns_get_record --
Fetch DNS Resource Records associated with a hostname
- fsockopen --
Apre una connessione a un socket appartenente a un dominio Internet o Unix
- gethostbyaddr --
Ottiene l'host Internet corrispondente a un dato indirizzo IP
- gethostbyname --
Ottiene l'indirizzo IP corrispondente a un dato hostname Internet
- gethostbynamel --
Ottiene la lista degli indirizzi IP corrispondenti a un dato hostname
Internet
- getmxrr --
Ottiene i record MX corrispondenti a un dato nome di host Internet
- getprotobyname --
Ottiene il numero del protocollo associato al nome del protocollo
- getprotobynumber --
Ottiene il nome del protocollo associato al numero del protocollo
- getservbyname --
Ottiene il numero di porta associato ad un servizio Internet e ad un protocollo
- getservbyport --
Ottiene il servizio Internet corrispondente ad una porta e ad un protocollo
- ip2long --
Converts a string containing an (IPv4) Internet Protocol dotted address
into a proper address.
Converte una stringa contenente un indirizzo di rete del Protocollo Internet (IPv4)
in un indirizzo espresso come tipo di dato int.
- long2ip --
Converte un indirizzo di rete del Protocollo Internet (IPv4) in una stringa contenente
un indirizzo espresso secondo la notazione standard di Internet.
- openlog -- Apre una connessione al logger di sistema
- pfsockopen --
Apre una connessione persistente Internet o di tipo domain socket Unix
- socket_get_status --
Restituisce informazioni su una risorsa socket esistente
- socket_set_blocking -- Imposta un socket in modalit� blocking/non-blocking
- socket_set_timeout -- Imposta il tempo di timeout per un socket
- syslog -- Genera un messaggio del system log
User Contributed Notes
Funzioni di rete |
  |
oliviert at videotron dot ca
18-Feb-1999 09:31 |
|
If u wanna do one of these function on windows95, u have to install the
lastest winsock before , if else php will crash with a message of
wsock32.dll
()
|
|
philip at cornado dot c()m
04-Jul-2001 09:18 |
|
View a few Networking PHP PEAR classes here :
|
|
philip at cornado dot c()m
04-Jul-2001 09:20 |
|
More socket functions can be seen here :
|
|
philippe-at-cyberabuse.org
15-Dec-2001 02:46 |
|
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));
}
|
|
philippe-at-cyberabuse.org
12-Oct-2002 10:49 |
|
... 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";
}
|
|
trevor-hemsley at nospam dot dial dot pipex dot com
16-Oct-2002 06:53 |
|
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;
}
?>
|
|
|
|
| |
Manuale PHP
Guida Funzioni
Apache
muscat_setup