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JS 实现I P地址分配

NetworkMgr = function() {

}
NetworkMgr.prototype = {
getIpAddressClass: function(address) {
var iaddress = this.toLong(address)
return this.getIpAddressClass0(iaddress);
},
getIpAddressClass0: function(iaddress) {
// var byte1 = iaddress >> 24;
var byte1 = iaddress / Math.pow(2, 24); // used to replace prior method :
// var byte1 = iaddress >> 24;
var clazz = null;
if (byte1 > 0 && byte1 <= 127)
clazz = "A";
else if (byte1 >= 128 && byte1 <= 191)
clazz = "B";
else if (byte1 >= 192 && byte1 <= 223)
clazz = "C";
else if (byte1 >= 224 && byte1 <= 255)
clazz = "D";
return clazz;
},

getNetworkMaskLength: function(address) {
var iaddress = this.toLong(address)
return this.getNetworkMaskLength0(iaddress);
},

getNetworkMaskLength0: function(iaddress) {
// var byte1 = iaddress >> 24;
var byte1 = iaddress / Math.pow(2, 24); // used to replace prior method :
// var byte1 = iaddress >> 24;
var length = -1;
if (byte1 > 0 && byte1 <= 127)
length = 8;
else if (byte1 >= 128 && byte1 <= 191)
length = 16;
else if (byte1 >= 192 && byte1 <= 223)
length = 24;
else if (byte1 >= 224 && byte1 <= 255)
length = 32;
return length;
},
available: function(from, to, maskLength) {
var network1 = null, network2 = null;
try {
network1 = this.getNetworkAddress(from, maskLength);
network2 = this.getNetworkAddress(to, maskLength);
} catch (e) {
throw 'Not a abailable ip address segment';
}
var availables = new Array();
if (network1 == null || network2 == null)
return availables;
// var step = 2 * (32 - maskLength);
var step = Math.pow(2, 32 - maskLength);
var count = (network2 - network1) / step;
var t = (network2 - network1) % step;
if (t != 0)
count++;
for (var i = 0; i <= count; i++) {
availables.push(network1);
network1 += step;
}
return availables;
},
availableSubnetAddress: function(address, addrMaskLength, maskLength) {
if (typeof address != "string")
throw 'Not a string type';
var iaddress = this.toLong(address);

return this.availableSubnetAddress0(iaddress, addrMaskLength, maskLength);
},
availableSubnetAddress0: function(iaddress, addrMaskLength, maskLength) {
if (typeof addrMaskLength != "number" || typeof maskLength != "number")
throw 'Not a number type';
if (typeof iaddress != "number")
throw 'Not a number type';

var count = Math.pow(2, maskLength - addrMaskLength);
var availables = new Array(count);
for (var i = 0; i < count; i++) {
availables[i] = iaddress + i * Math.pow(2, 32 - maskLength);
}
return availables;
},

getHostAddressArrange: function(address, maskLength) {
return this.toIpAddr(address + 1) + " ～ " +
    this.toIpAddr(address + Math.pow(2, 32 - maskLength) - 2);
},

getEndIpAddress: function(startIpAddress, maskLength) {
var iEndAddress = this.getEndAddress(startIpAddress, maskLength);
return this.toIpAddr(iEndAddress);
},
getEndIpAddress0: function(iStartIpAddress, maskLength) {
var iEndAddress = this.getEndAddress0(iStartIpAddress, maskLength);
return this.toIpAddr(iEndAddress);
},

getEndAddress: function(startIpAddress, maskLength) {
var iStartAddress = this.toLong(startIpAddress);
return this.getEndAddress0(iStartAddress, maskLength);
},
getEndAddress0: function(iStartAddress, maskLength) {
//     var iEndAddress = iStartAddress >> (32 - maskLength);
//     iEndAddress = iEndAddress << (32 - maskLength);
var iEndAddress = iStartAddress / Math.pow(2, (32 - maskLength));// used to replace prior method :
// var iEndAddress = iStartAddress >> (32 - maskLength);
iEndAddress = iEndAddress * Math.pow(2, (32 - maskLength));      // used to replace prior method :
// iEndAddress = iEndAddress << (32 - maskLength);
    iEndAddress += Math.pow(2, 32 - maskLength) - 1;
    return iEndAddress;
},

toLong: function(ipAddr) {
var s = ipAddr.split('.');
if (s.length != 4)
throw 'Not a available ip format';
var n = 0;
for (var i = 0; i < s.length; i++) {
var si = s[i];
if (isNaN(si))
throw 'Not a number type';
// n = n << 8;
n = n * Math.pow(2, ; // used to replace prior method : n = n << 8;
n = n + parseInt(si, 10);
if (isNaN(n))
throw 'Not a number type';
}
return n;
},
toIpAddr: function(_long) {
// if (isNaN(number))
if (typeof _long != "number")
throw 'Not a number type';
var b = _long.toString(2);
if (b.length != 32) {
for (var i = b.length + 1; i <= 32; i++) {
b = '0' + b;
}
}
var i = 0;
var seg = -8;
var s = '';
while (i <= 3) {
seg += 8;
var sub = b.substr(seg, ;
var p = 0;
for (var j = 0; j < sub.length; j++) {
var tt = Math.pow(2, j);
var jj = sub.charAt(sub.length - 1 - j);
jj = parseInt(jj);
p += jj * tt;
}
s = s + p;
if (i != 3)
s = s + '.';
i++;
}
return s;
},
toNetwork: function(_long, maskLength) {
var ipAddr = this.toIpAddr(_long);
return ipAddr + '/' + maskLength;
},
getNetworkAddress0: function(number, maskLength) {
// if (isNaN(number) || maskLength)
if (typeof number != "number" || typeof maskLength != "number")
throw 'Not a number type';
var test = 2 << 1;
test = 2 << 2;
test = 2 << 3;
test = 3 << 2;
var t1 = Math.pow(2, 32) - 1;
var t2 = Math.pow(2, 32 - maskLength) - 1;
return number & (t1 - t2);
},
getNetworkAddress: function(ipAddr, maskLength) {
var n = this.toLong(ipAddr);
return this.getNetworkAddress0(n, maskLength);
},
getNetworkDestinationIpAddress: function(start, maskLength) {
var n = this.toLong(start);
n = n << (32 - maskLength);
var t = Math.pow(2, 32 - maskLength) -1;
n += t;
return n;
}
}




JS 实现I P地址分配 二：

SubnetCalMgr = Ext.extend(Ext.Panel, {
subnetInfoPanel: null,
subnetId: null,

initComponent: function() {
  SubnetCalMgr.superclass.initComponent.call(this);
  this._initialize();
},
_initialize: function() {
//  this.setLayout(new Ext.layout.FitLayout());
  this.initSubnetInfoPanel();
  this.add(this.subnetInfoPanel);
},
getContentPanel: function() {
  return this.contentPanel;
},
loadSubnetInfoData: function(storeData) {
  var grid = this.subnetInfoPanel;
  var el = grid.getEl();
  el.mask("数据加载中...");
     var task = new Ext.util.DelayedTask(function() {
   grid.getStore().loadData(storeData);
//   grid.el.unmask();
   el.unmask();
  }, this);
  task.delay(100);
},
initSubnetInfoPanel: function() {
  var scope = this;
  var createStore = function(arraydatasource) {
   var store = new Ext.data.SimpleStore({
    fields: [{
     name: "subnetAddress", type: "string"
    }, {
     name: 'maskLength', type: 'int'
    }, {
     name: 'networkAddress', type: 'string'
    }, {
     name: 'broadcastAddress', type: 'string'
    }, {
     name: 'hostSegArrange', type: 'string'
    }]
   });
   store.loadData(arraydatasource);
   return store;
  };
  var createColumnModel = function(plugins, header) {
   return new Ext.grid.ColumnModel([
          //plugins,
          //new Ext.grid.CheckboxSelectionModel(),
          //new Ext.grid.RowSelectionModel({
    // singleSelect: true
    //}),
          {id: 'subnetAddress', header: "子网地址", width: 160, sortable: true, dataIndex: 'subnetAddress', hidden: false},
    {header: '掩码长度', width: 160, sortable: true, dataIndex: 'maskLength'},
    {header: '网络地址', width: 160, sortable: true, dataIndex: 'networkAddress'},
    {header: '广播地址', width: 160, sortable: true, dataIndex: 'broadcastAddress'},
    {header: '主机范围', width: 160, sortable: true, dataIndex: 'hostSegArrange'}
      ]);
  };
  var createRightGridPanel = function(groupId) {
   var acl = [];
   var store = createStore(acl);
  
   var cm = createColumnModel(null, '');
 
   var selects = [[-1, '请选择掩码长度(默认为24)'],
    [8, '8'], [9, '9'], [10, '10'], [11, '11'], [12, '12'],
    [13, '13'], [14, '14'], [15, '15'], [16, '16'], [17, '17'],
    [18, '18'], [19, '19'], [20, '20'], [21, '21'], [22, '22'],
    [23, '23'], [24, '24'], [25, '25'], [26, '26'], [27, '27'],
    [28, '28'], [29, '29'], [30, '30'], [31, '31'], [32, '32']];
   var grid = new Ext.grid.GridPanel({
//    title: '子段信息',
//    sm: new Ext.grid.CheckboxSelectionModel(),
    sm: new Ext.grid.RowSelectionModel(/*{
     singleSelect: true
    }*/),
          store: store,
          cm: cm,
          stripeRows: true,
          viewConfig: {
              forceFit: true
          },
          region: 'center',
//          plugins: expander,
          border: true,
          margins: '0 0 0 0',
          bodyStyle: 'padding:　0px;',
          animCollapse: false,
          buttonAlign: 'center',
          tbar: new Ext.Toolbar(["网段地址：", {
           xtype: 'textfield',
           id: 'byte1',
           width: 50
          }, '.', {
           xtype: 'textfield',
           id: 'byte2',
           width: 50
          }, '.', {
           xtype: 'textfield',
           id: 'byte3',
           width: 50
          }, '.', {
           xtype: 'textfield',
           id: 'byte4',
           width: 50
          }, '     ', {
           xtype: 'combo',
           id: 'subnetMaskLength',
           typeAhead: true,
           triggerAction: 'all',
           store: new Ext.data.SimpleStore({
               fields: ['keyitem', 'valueitem'],
               data: selects
           }),
           displayField: 'valueitem',
           forceSelection: true,
           name: 'valueitem',
           valueField: 'keyitem',
           value: -1,
           mode: 'local',
           editable: false
          }, {
           xtype: 'button',
     text : "确定",
     iconCls : "icon-yes",
     handler : function(button, eventObject) {
      scope.onBtnOk();
     }
    }])
      });
      return grid;
  };
  this.subnetInfoPanel = createRightGridPanel();
},
onBtnOk: function() {
  var address = '';
  for (var i = 1; i <= 4; i++) {
   var bytei = Ext.getCmp('byte' + i).getValue();
   address = address + bytei + '.';
  }
  address = address.substr(0, address.length - 1);
  var subnetMaskLength = Ext.getCmp('subnetMaskLength').getValue();
  if (subnetMaskLength == -1)
   subnetMaskLength = 24;
 
  var networkMgr = new NetworkMgr();
  var networkMaskLength = networkMgr.getNetworkMaskLength(address);
  var availables = networkMgr.availableSubnetAddress(
    address,
    networkMaskLength,
    subnetMaskLength);
  var storeData = [];
  for (var i = 0; i < availables.length; i++) {
   var subnetAddress = availables[i];
   var subnetIpAddress = networkMgr.toIpAddr(subnetAddress);
   storeData[i] = [
    subnetIpAddress,
    subnetMaskLength,
    subnetIpAddress,
    networkMgr.getEndIpAddress0(subnetAddress, subnetMaskLength),
    networkMgr.getHostAddressArrange(subnetAddress, subnetMaskLength)
   ]
  }
  this.loadSubnetInfoData(storeData);
},
getSubnetInfoPanel: function() {
  return this.subnetInfoPanel;
}
});