Expose errno exception creation

lib/net.js

@@ -27,6 +27,7 @@ var socketError = process.socketError;
 var getsockname = process.getsockname;
 var getaddrinfo = process.getaddrinfo;
 var needsLookup = process.needsLookup;
+var errnoException = process.errnoException;
 var EINPROGRESS = process.EINPROGRESS;
 var ENOENT      = process.ENOENT;
 var END_OF_FILE = 0;
@@ -397,7 +398,7 @@ Socket.prototype.connect = function () {
     self._writeWatcher.set(self.fd, false, true);
     self._writeWatcher.start();
     self._writeWatcher.callback = function () {
-        var errno = socketError(self.fd);
+      var errno = socketError(self.fd);
       if (errno == 0) {
         // connection established
         self._readWatcher.start();
@@ -406,9 +407,7 @@ Socket.prototype.connect = function () {
         self._writeWatcher.callback = self._doFlush;
         self.emit('connect');
       } else if (errno != EINPROGRESS) {
-        var e = new Error('connection error');
-        e.errno = errno;
-        self.forceClose(e);
+        self.forceClose(errnoException(errno, 'connect'));
       }
     };
   }

src/node_net2.cc

@@ -1246,6 +1246,18 @@ static Handle<Value> NeedsLookup(const Arguments& args) {
 }
 
 
+static Handle<Value> CreateErrnoException(const Arguments& args) {
+  HandleScope scope;
+
+  int errorno = args[0]->Int32Value();
+  String::Utf8Value syscall(args[1]->ToString());
+
+  Local<Value> exception = ErrnoException(errorno, *syscall); 
+
+  return scope.Close(exception);
+}
+
+
 void InitNet2(Handle<Object> target) {
   HandleScope scope;
 
@@ -1275,6 +1287,7 @@ void InitNet2(Handle<Object> target) {
   NODE_SET_METHOD(target, "getpeername", GetPeerName);
   NODE_SET_METHOD(target, "getaddrinfo", GetAddrInfo);
   NODE_SET_METHOD(target, "needsLookup", NeedsLookup);
+  NODE_SET_METHOD(target, "errnoException", CreateErrnoException);
 
   target->Set(String::NewSymbol("ENOENT"), Integer::New(ENOENT));
   target->Set(String::NewSymbol("EINPROGRESS"), Integer::New(EINPROGRESS));