chore: one var per variable

lib/api/exists.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request;
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
 
 /*
  * exists

lib/api/mkdir.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request;
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
 
 /*
  * mkdir

lib/api/readFile.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request,
-  bigint = require('../tools/bigint'),
-  MAX_READ_LENGTH = require('../structures/constants').MAX_READ_LENGTH;
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
+var bigint = require('../tools/bigint');
+var MAX_READ_LENGTH = require('../structures/constants').MAX_READ_LENGTH;
 
 /*
  * readFile
@@ -28,10 +28,10 @@ module.exports = function readFile(filename, options, cb) {
     if (err) cb && cb(err);
     // SMB2 read file content
     else {
-      var fileLength = 0,
-        offset = new bigint(8),
-        stop = false,
-        nbRemainingPackets = 0;
+      var fileLength = 0;
+      var offset = new bigint(8);
+      var stop = false;
+      var nbRemainingPackets = 0;
       // get file length
       for (var i = 0; i < file.EndofFile.length; i++) {
         fileLength += file.EndofFile[i] * Math.pow(2, i * 8);

lib/api/readdir.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request;
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
 
 /*
  * readdir

lib/api/rmdir.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request,
-  bigint = require('../tools/bigint');
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
+var bigint = require('../tools/bigint');
 
 /*
  * rmdir

lib/api/unlink.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request,
-  bigint = require('../tools/bigint');
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
+var bigint = require('../tools/bigint');
 
 /*
  * unlink

lib/api/writeFile.js

-var SMB2Forge = require('../tools/smb2-forge'),
-  SMB2Request = SMB2Forge.request,
-  bigint = require('../tools/bigint');
+var SMB2Forge = require('../tools/smb2-forge');
+var SMB2Request = SMB2Forge.request;
+var bigint = require('../tools/bigint');
 
 /*
  * writeFile
@@ -18,19 +18,19 @@ var SMB2Forge = require('../tools/smb2-forge'),
  *
  */
 module.exports = function writeFile(filename, data, options, cb) {
-  if (typeof options == 'function') {
+  if (typeof options === 'function') {
     cb = options;
     options = {};
   }
 
   options.encoding = options.encoding || 'utf8';
 
-  var connection = this,
-    file,
-    fileContent = Buffer.isBuffer(data)
-      ? data
-      : Buffer.from(data, options.encoding),
-    fileLength = new bigint(8, fileContent.length);
+  var connection = this;
+  var file;
+  var fileContent = Buffer.isBuffer(data)
+    ? data
+    : Buffer.from(data, options.encoding);
+  var fileLength = new bigint(8, fileContent.length);
 
   function createFile(fileCreated) {
     SMB2Request('create', { path: filename }, connection, function(err, f) {
@@ -70,10 +70,10 @@ module.exports = function writeFile(filename, data, options, cb) {
   }
 
   function writeFile(fileWritten) {
-    var offset = new bigint(8),
-      stop = false,
-      nbRemainingPackets = 0,
-      maxPacketSize = new bigint(8, 0x00010000 - 0x71);
+    var offset = new bigint(8);
+    var stop = false;
+    var nbRemainingPackets = 0;
+    var maxPacketSize = new bigint(8, 0x00010000 - 0x71);
     // callback manager
     function callback() {
       return function(err) {

lib/messages/close.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection, params) {

lib/messages/create_folder.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 var constants = require('../structures/constants');
 
 module.exports = message({

lib/messages/negotiate.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection) {

lib/messages/open.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection, params) {

lib/messages/open_folder.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 var constants = require('../structures/constants');
 
 module.exports = message({

lib/messages/query_directory.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection, params) {
@@ -26,9 +26,9 @@ module.exports = message({
  * HELPERS
  */
 function parseFiles(buffer) {
-  var files = [],
-    offset = 0,
-    nextFileOffset = -1;
+  var files = [];
+  var offset = 0;
+  var nextFileOffset = -1;
   while (nextFileOffset != 0) {
     // extract next file offset
     nextFileOffset = buffer.readUInt32LE(offset);
@@ -48,8 +48,8 @@ function parseFiles(buffer) {
 }
 
 function parseFile(buffer) {
-  var file = {},
-    offset = 0;
+  var file = {};
+  var offset = 0;
 
   // index
   file.Index = buffer.readUInt32LE(offset);

lib/messages/read.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection, file) {

lib/messages/session_setup_step1.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message'),
-  ntlm = require('ntlm');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
+var ntlm = require('ntlm');
 
 module.exports = message({
   generate: function(connection) {

lib/messages/session_setup_step2.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message'),
-  ntlm = require('ntlm');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
+var ntlm = require('ntlm');
 
 module.exports = message({
   generate: function(connection) {

lib/messages/set_info.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 var fileInfoClasses = {
   FileAllocationInformation: 19,

lib/messages/tree_connect.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection) {

lib/messages/write.js

-var SMB2Message = require('../tools/smb2-message'),
-  message = require('../tools/message');
+var SMB2Message = require('../tools/smb2-message');
+var message = require('../tools/message');
 
 module.exports = message({
   generate: function(connection, params) {

lib/smb2.js

 /*
  * CONSTANTS
  */
-var shareRegExp = /\\\\([^\\]*)\\([^\\]*)\\?/,
-  port = 445,
-  packetConcurrency = 20,
-  autoCloseTimeout = 10000;
+var shareRegExp = /\\\\([^\\]*)\\([^\\]*)\\?/;
+var port = 445;
+var packetConcurrency = 20;
+var autoCloseTimeout = 10000;
 
 /*
  * DEPENDENCIES

lib/tools/bigint.js

@@ -17,8 +17,8 @@ var BigInt = (module.exports = function(n, v) {
 
       v = v.toString(16);
 
-      var size = Math.ceil(v.length / 2),
-        carry = size * 2 - v.length;
+      var size = Math.ceil(v.length / 2);
+      var carry = size * 2 - v.length;
 
       for (var i = 0; i < size; i++) {
         var start = (size - i - 1) * 2 - carry;
@@ -43,7 +43,7 @@ BigInt.toBigInt = function(n, v) {
 };
 
 BigInt.fromBuffer = function(b, sign) {
-  sign = typeof sign == 'undefined' ? 1 : sign;
+  sign = typeof sign === 'undefined' ? 1 : sign;
   var bi = new BigInt(0);
   bi.sign = sign;
   bi.buffer = b;
@@ -62,9 +62,9 @@ BigInt.prototype.add = function(v) {
     return this.neg().sub(v);
   }
 
-  var carry = 0,
-    n = Math.max(v.buffer.length, this.buffer.length),
-    result = new BigInt(n);
+  var carry = 0;
+  var n = Math.max(v.buffer.length, this.buffer.length);
+  var result = new BigInt(n);
   for (var i = 0; i < n; i++) {
     var r =
       (i < this.buffer.length ? this.buffer.readUInt8(i) : 0) +
@@ -100,12 +100,12 @@ BigInt.prototype.sub = function(v) {
     return this.add(v.neg());
   }
 
-  var carry = 0,
-    a = new BigInt(this),
-    b = new BigInt(v),
-    n = Math.max(a.buffer.length, b.buffer.length),
-    result = new BigInt(n),
-    sign = this.sign;
+  var carry = 0;
+  var a = new BigInt(this);
+  var b = new BigInt(v);
+  var n = Math.max(a.buffer.length, b.buffer.length);
+  var result = new BigInt(n);
+  var sign = this.sign;
 
   if (a.abs().lt(b.abs())) {
     var t = a;
@@ -115,10 +115,10 @@ BigInt.prototype.sub = function(v) {
   }
 
   for (var i = 0; i < n; i++) {
-    var va = i < a.buffer.length ? a.buffer.readUInt8(i) : 0,
-      vb = i < b.buffer.length ? b.buffer.readUInt8(i) : 0,
-      c = 0,
-      r = va - vb - carry;
+    var va = i < a.buffer.length ? a.buffer.readUInt8(i) : 0;
+    var vb = i < b.buffer.length ? b.buffer.readUInt8(i) : 0;
+    var c = 0;
+    var r = va - vb - carry;
 
     while (r < 0) {
       r += 0xff;
@@ -165,8 +165,8 @@ BigInt.prototype.compare = function(v) {
   if (this.sign < v.sign) return -1;
 
   for (var i = n - 1; i >= 0; i--) {
-    var a = i < this.buffer.length ? this.buffer.readUInt8(i) : 0,
-      b = i < v.buffer.length ? v.buffer.readUInt8(i) : 0;
+    var a = i < this.buffer.length ? this.buffer.readUInt8(i) : 0;
+    var b = i < v.buffer.length ? v.buffer.readUInt8(i) : 0;
     if (a != b) {
       return a > b ? this.sign : -this.sign;
     }

lib/tools/message.js

-var MsErref = require('./ms_erref'),
-  bigint = require('./bigint');
+var MsErref = require('./ms_erref');
+var bigint = require('./bigint');
 
 var defaults = {
   successCode: 'STATUS_SUCCESS',
@@ -8,8 +8,8 @@ var defaults = {
     var self = this;
 
     return function(response) {
-      var h = response.getHeaders(),
-        err = MsErref.getStatus(bigint.fromBuffer(h.Status).toNumber());
+      var h = response.getHeaders();
+      var err = MsErref.getStatus(bigint.fromBuffer(h.Status).toNumber());
       if (err.code == self.successCode) {
         self.onSuccess && self.onSuccess(connection, response);
         cb && cb(null, self.parseResponse && self.parseResponse(response));

lib/tools/smb2-connection.js

 /*
  * DEPENDENCIES
  */
-var net = require('net'),
-  SMB2Forge = require('./smb2-forge'),
-  SMB2Request = SMB2Forge.request;
+var net = require('net');
+var SMB2Forge = require('./smb2-forge');
+var SMB2Request = SMB2Forge.request;
 
 /*
  * CONNECTION MANAGER

lib/tools/smb2-forge.js

@@ -12,8 +12,8 @@ var SMB2Forge = (module.exports = {});
  * SMB2 MESSAGE FORGE
  */
 SMB2Forge.request = function(messageName, params, connection, cb) {
-  var msg = require('../messages/' + messageName),
-    smbMessage = msg.generate(connection, params);
+  var msg = require('../messages/' + messageName);
+  var smbMessage = msg.generate(connection, params);
   // send
   sendNetBiosMessage(connection, smbMessage);
   // wait for the response
@@ -48,8 +48,8 @@ SMB2Forge.response = function(c) {
           // set the flags
           extract = true;
           // parse message
-          var r = c.responseBuffer.slice(4, msgLength + 4),
-            message = new SMB2Message();
+          var r = c.responseBuffer.slice(4, msgLength + 4);
+          var message = new SMB2Message();
           message.parseBuffer(r);
           //debug
           if (c.debug) {

lib/tools/smb2-message.js

@@ -2,79 +2,84 @@
  * CONSTANTS
  */
 var protocolId = Buffer.from([
-    0xfe,
-    'S'.charCodeAt(0),
-    'M'.charCodeAt(0),
-    'B'.charCodeAt(0),
-  ]),
-  headerTranslates = {
-    Command: {
-      NEGOTIATE: 0x0000,
-      SESSION_SETUP: 0x0001,
-      LOGOFF: 0x0002,
-      TREE_CONNECT: 0x0003,
-      TREE_DISCONNECT: 0x0004,
-      CREATE: 0x0005,
-      CLOSE: 0x0006,
-      FLUSH: 0x0007,
-      READ: 0x0008,
-      WRITE: 0x0009,
-      LOCK: 0x000a,
-      IOCTL: 0x000b,
-      CANCEL: 0x000c,
-      ECHO: 0x000d,
-      QUERY_DIRECTORY: 0x000e,
-      CHANGE_NOTIFY: 0x000f,
-      QUERY_INFO: 0x0010,
-      SET_INFO: 0x0011,
-      OPLOCK_BREAK: 0x0012,
-    },
-  },
-  // eslint-disable-next-line no-unused-vars
-  flags = {
-    SERVER_TO_REDIR: 0x00000001,
-    ASYNC_COMMAND: 0x00000002,
-    RELATED_OPERATIONS: 0x00000004,
-    SIGNED: 0x00000008,
-    DFS_OPERATIONS: 0x10000000,
-    REPLAY_OPERATION: 0x20000000,
-  },
-  headerLength = 64,
-  headerSync = function(processId, sessionId) {
-    return [
-      ['ProtocolId', 4, protocolId],
-      ['StructureSize', 2, headerLength],
-      ['CreditCharge', 2, 0],
-      ['Status', 4, 0],
-      ['Command', 2],
-      ['Credit', 2, 126],
-      ['Flags', 4, 0],
-      ['NextCommand', 4, 0],
-      ['MessageId', 4],
-      ['MessageIdHigh', 4, 0],
-      ['ProcessId', 4, processId],
-      ['TreeId', 4, 0],
-      ['SessionId', 8, sessionId],
-      ['Signature', 16, 0],
-    ];
+  0xfe,
+  'S'.charCodeAt(0),
+  'M'.charCodeAt(0),
+  'B'.charCodeAt(0),
+]);
+
+var headerTranslates = {
+  Command: {
+    NEGOTIATE: 0x0000,
+    SESSION_SETUP: 0x0001,
+    LOGOFF: 0x0002,
+    TREE_CONNECT: 0x0003,
+    TREE_DISCONNECT: 0x0004,
+    CREATE: 0x0005,
+    CLOSE: 0x0006,
+    FLUSH: 0x0007,
+    READ: 0x0008,
+    WRITE: 0x0009,
+    LOCK: 0x000a,
+    IOCTL: 0x000b,
+    CANCEL: 0x000c,
+    ECHO: 0x000d,
+    QUERY_DIRECTORY: 0x000e,
+    CHANGE_NOTIFY: 0x000f,
+    QUERY_INFO: 0x0010,
+    SET_INFO: 0x0011,
+    OPLOCK_BREAK: 0x0012,
   },
-  headerASync = function(processId, sessionId) {
-    return [
-      ['ProtocolId', 4, protocolId],
-      ['StructureSize', 2, headerLength],
-      ['CreditCharge', 2, 0],
-      ['Status', 4, 0],
-      ['Command', 2],
-      ['Credit', 2, 126],
-      ['Flags', 4, 0],
-      ['NextCommand', 4, 0],
-      ['MessageId', 4],
-      ['MessageIdHigh', 4, 0],
-      ['AsyncId', 8],
-      ['SessionId', 8, sessionId],
-      ['Signature', 16, 0],
-    ];
-  };
+};
+
+// eslint-disable-next-line no-unused-vars
+var flags = {
+  SERVER_TO_REDIR: 0x00000001,
+  ASYNC_COMMAND: 0x00000002,
+  RELATED_OPERATIONS: 0x00000004,
+  SIGNED: 0x00000008,
+  DFS_OPERATIONS: 0x10000000,
+  REPLAY_OPERATION: 0x20000000,
+};
+
+var headerLength = 64;
+
+var headerSync = function(processId, sessionId) {
+  return [
+    ['ProtocolId', 4, protocolId],
+    ['StructureSize', 2, headerLength],
+    ['CreditCharge', 2, 0],
+    ['Status', 4, 0],
+    ['Command', 2],
+    ['Credit', 2, 126],
+    ['Flags', 4, 0],
+    ['NextCommand', 4, 0],
+    ['MessageId', 4],
+    ['MessageIdHigh', 4, 0],
+    ['ProcessId', 4, processId],
+    ['TreeId', 4, 0],
+    ['SessionId', 8, sessionId],
+    ['Signature', 16, 0],
+  ];
+};
+
+var headerASync = function(processId, sessionId) {
+  return [
+    ['ProtocolId', 4, protocolId],
+    ['StructureSize', 2, headerLength],
+    ['CreditCharge', 2, 0],
+    ['Status', 4, 0],
+    ['Command', 2],
+    ['Credit', 2, 126],
+    ['Flags', 4, 0],
+    ['NextCommand', 4, 0],
+    ['MessageId', 4],
+    ['MessageIdHigh', 4, 0],
+    ['AsyncId', 8],
+    ['SessionId', 8, sessionId],
+    ['Signature', 16, 0],
+  ];
+};
 
 /*
  * CONSTRUCTOR
@@ -119,8 +124,8 @@ proto.getResponse = function() {
 };
 
 proto.getBuffer = function(connection) {
-  var buffer = Buffer.allocUnsafe(0xffff),
-    length = 0;
+  var buffer = Buffer.allocUnsafe(0xffff);
+  var length = 0;
 
   // SET MESSAGE ID
   if (!this.isMessageIdSetted) {
@@ -213,13 +218,13 @@ function unTranslate(key, value) {
  */
 function readHeaders(message, buffer) {
   var header = (message.isAsync ? headerASync : headerSync)(
-      message.ProcessId,
-      message.SessionId
-    ),
-    offset = 0;
+    message.ProcessId,
+    message.SessionId
+  );
+  var offset = 0;
   for (var i in header) {
-    var key = header[i][0],
-      length = header[i][1];
+    var key = header[i][0];
+    var length = header[i][1];
     message.headers[key] = readData(buffer, offset, length);
     if (length <= 8) {
       message.headers[key] =
@@ -234,14 +239,14 @@ function readHeaders(message, buffer) {
 
 function writeHeaders(message, buffer) {
   var header = (message.isAsync ? headerASync : headerSync)(
-      message.ProcessId,
-      message.SessionId
-    ),
-    offset = 0;
+    message.ProcessId,
+    message.SessionId
+  );
+  var offset = 0;
   for (var i in header) {
-    var key = header[i][0],
-      length = header[i][1],
-      defaultValue = header[i][2] || 0;
+    var key = header[i][0];
+    var length = header[i][1];
+    var defaultValue = header[i][2] || 0;
     writeData(
       buffer,
       translate(key, message.headers[key] || defaultValue),
@@ -255,8 +260,8 @@ function writeHeaders(message, buffer) {
 
 function readResponse(message, buffer, offset) {
   for (var i in message.structure.response) {
-    var key = message.structure.response[i][0],
-      length = message.structure.response[i][1] || 1;
+    var key = message.structure.response[i][0];
+    var length = message.structure.response[i][1] || 1;
     if (typeof length == 'string') {
       length = bufferToData(message.response[length]);
     }
@@ -266,14 +271,14 @@ function readResponse(message, buffer, offset) {
 }
 
 function writeRequest(message, buffer, offset) {
-  var initOffset = offset,
-    needsRewrite = false,
-    tmpBuffer = Buffer.allocUnsafe(buffer.length);
+  var initOffset = offset;
+  var needsRewrite = false;
+  var tmpBuffer = Buffer.allocUnsafe(buffer.length);
   offset = 0;
   for (var i in message.structure.request) {
-    var key = message.structure.request[i][0],
-      length = message.structure.request[i][1] || 1,
-      defaultValue = message.structure.request[i][2] || 0;
+    var key = message.structure.request[i][0];
+    var length = message.structure.request[i][1] || 1;
+    var defaultValue = message.structure.request[i][2] || 0;
     if (typeof length == 'string') {
       message.request[key] = message.request[key] || '';
       if (message.request[length] != message.request[key].length) {