check php,check.php
class CheckIp {
public static $status;
public function check($ip, $port) {
$tcp = $this->checktcp($ip, $port);
$icmp = $this->checkicmp($ip, $port);
return json_encode(['ip' => $ip, 'port' => $port, 'tcp' => $tcp, 'icmp' => $icmp]);
}
// tcp
public function checktcp($ip, $port) {
$sock = @socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_nonblock($sock);
socket_connect($sock, $ip, $port);
socket_set_block($sock);
$s1 = array($sock);
$s2 = array($sock);
$s3 = array($sock);
self::$status = socket_select($s1, $s2, $s3, 5);
if (self::$status == 2) {
return 'Close';
} else if (self::$status == 1) {
return 'Open';
} else if (self::$status == 0) {
return 'TimeOut';
}
return null;
}
// icmp
public function checkicmp($ip, $port) {
$data = 'Z' . 'F' . chr(0) . chr(211);
//ping程序凑够64byte的报文,这里包括IP首部20byte
for ($i = 0; $i < 56; $i++) {
$data .= chr(0);
}
$result = $this->sendPackage($ip, 8, 0, $data, function ($message) {});
if ($result != null) {
return $result;
} else {
return 'Open';
}
}
public function sendPackage($host, $type, $code, $data, $callbackfunc) {
$g_icmp_error = null;
$package = chr($type) . chr($code);
$package .= chr(0) . chr(0);
$package .= $data;
$this->setSum($package);
$socket = @socket_create(AF_INET, SOCK_RAW, getprotobyname('icmp'));
if ($socket == false) {
//在linux下socket icmp无法被创建 所以用exec来测试
$i = @exec("ping $host -c 1");
if (empty($i)) {
return 'Close';
}
return 'Open';
}
socket_sendto($socket, $package, strlen($package), 0, $host, 0);
$read = array($socket);
$write = NULL;
$except = NULL;
$select = socket_select($read, $write, $except, 0, 300 * 1000);
if ($select === NULL) {
$g_icmp_error = "Error";
socket_close($socket);
return $g_icmp_error;
} elseif ($select === 0) {
$g_icmp_error = "TimeOut";
socket_close($socket);
return $g_icmp_error;
}
socket_recvfrom($socket, $recv, 65535, 0, $host, $port);
call_user_func($callbackfunc, $recv);
return $g_icmp_error;
}
public function setSum(&$data) {
$list = unpack('n*', $data);
$length = strlen($data);
$sum = array_sum($list);
if ($length % 2) {
$tmp = unpack('C*', $data[$length - 1]);
$sum += $tmp[1];
}
$sum = ($sum >> 16) + ($sum & 0xffff);
$sum += ($sum >> 16);
$r = pack('n*', ~$sum);
$data[2] = $r[0];
$data[3] = $r[1];
}
}
header('content-type:application/json');
header("Access-Control-Allow-Origin:*");
header('Access-Control-Allow-Methods:POST');
header('Access-Control-Allow-Headers:x-requested-with, content-type');
$ip = @$_POST['ip'];
$port = @$_POST['port'];
if (empty($ip) || empty($port)) {
echo json_encode(['code' => 1, 'msg' => '缺少參數']);
} else {
if (!preg_match('/(&|\s|;|-)/', $ip)) {
$health = new CheckIp();
echo $health->check($ip, $port);
} else {
echo json_encode(['code' => 1, 'msg' => '非法参数']);
}
}
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