src: add args validation method

Author: arxngr

src/tcp_wrap.cc

@@ -276,14 +276,9 @@ void TCPWrap::Listen(const FunctionCallbackInfo<Value>& args) {
 }
 
 void TCPWrap::Connect(const FunctionCallbackInfo<Value>& args) {
-  if (args.Length() <= 2) {
-    args.GetIsolate()->ThrowException(v8::Exception::TypeError(
-        v8::String::NewFromUtf8(args.GetIsolate(), "Insufficient arguments")
-            .ToLocalChecked()));
-    return;
-  }
-
-  CHECK(args[2]->IsUint32());
+  Environment* env = Environment::GetCurrent(args);
+  int backlog;
+  if (!args[2]->Int32Value(env->context()).To(&backlog)) return;
   // explicit cast to fit to libuv's type expectation
   int port = static_cast<int>(args[2].As<Uint32>()->Value());
   Connect<sockaddr_in>(args, [port](const char* ip_address, sockaddr_in* addr) {
@@ -293,7 +288,7 @@ void TCPWrap::Connect(const FunctionCallbackInfo<Value>& args) {
 
 void TCPWrap::Connect6(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
-  CHECK(args[2]->IsUint32());
+
   int port;
   if (!args[2]->Int32Value(env->context()).To(&port)) return;
   Connect<sockaddr_in6>(args,