Udp sender can send but receiver can not receive

Development Programming & Scripting C++
, , ,
2

void AUdpActor::RecvData(const FArrayReaderPtr & ArrayReadPrt, const FIPv4Endpoint & EndPt)
{
//FString msg;
GLog->Logf(TEXT(“Receiver msg”));
}

void AUdpActor::SendData(FString str)
{
	if (!isStartUdpSucessful) return;
	int32 sendNum = 0;
	FString serialized = str;
	TCHAR *serializedChar = serialized.GetCharArray().GetData();
	int32 size = FCString::Strlen(serializedChar);
	UdpSenderSocket->SendTo((uint8*)TCHAR_TO_UTF8(serializedChar), size, sendNum,*RemoteAddr);
	if (sendNum <= 0)
	{
		const FString Str = "Socket is valid but the receiver received 0 bytes, make sure it is listening properly!";
		GLog->Logf(TEXT("warning : %s"), *Str);
	}
	else
	{
		GLog->Logf(TEXT("send str : %s"), *str);
	}
}