Simple, Robust and Expandable Winsock Server for Multiple Clients with Easy to Add New Services

/*
Author Vadim Motorine  
email vad@friendly-ware.com
Copyright (C) 2006 Vadim Motorine 
*/


#pragma once
#include "stdafx.h"
#include "winsock2.h"
#include <string>
class CTskPsprt;
//class CIntrprttr;
class CTrdClssCr;
struct STskOnly;


/*
The class CCnctnVM is reponsible for the sending the commands to the server and receiving the data.
It knows nothing about the data it handles.
*/

class CCnctnVM
{
	CTskPsprt* psprt;//to exchange the information with the working thread
	SOCKET sock;
	ULONG ulBlock;//special parameter, should be initially >0 for the unblocking mode
	int rcvbfSz;//the size of the recieving buffer
	int sndBufSz;//the size of the sending buffer
	char szRecvBuff[1024];//recieving buffer
	char szSendBuff[1024];//sending fuffer
	int ret; //bytes returned
	FD_SET ReadSet; //the structure to test the socket reading availability.
	FD_SET WriteSet;//the structure to test the socket writing availability.
	timeval wtTm;//time to wait for the read/write before checking for other commands
	int slpTm; //sleeping time  for the case of the server crashed disconnection
	struct sockaddr_in server; //the server address structure.
	
public:
	CCnctnVM(CTskPsprt* psprtI);
	~CCnctnVM(void);
	void InttrptCnnctn();//interrupts the connection
	bool Init(const STskOnly* tskOnlP);//makes the connection
//Receives the data	
	bool Recieve(CTrdClssCr* tskP, const STskOnly* tskOnlP, bool isFrstTry = false);
//Sends the command	
	bool Send(const std::string& sndStr, const STskOnly* tskOnlP , bool isFrstTry = false);	
};

I am working in the Russian branch of an international company in Novosibirsk (Russia) as the software engineer ("Software Engineer V") and the leader of the small team.

Now I believe that my level is so high that in C++ and MS Windows the specific "technology" does not important to me. It is probably enough to say that in my last shareware project (Your Voice Reminder, year 2006) I substituted my own clocks instead of the regular Microsoft in the MS Windows taskbar and implemented my own code to record and clear the voice messages including trimming the pause at the end. So now theses clocks may say date and time with your own voice. Also when I made a (limited time) test client / server project for a company to get the job (year 2006), I made the best project (as they estimated it) though I had no previous experience in the client /server programming.

The most large software that I made myself from the scratch had more than 60,000 lines of code and more than 300 C++ classes.

During seven years I was the manager of the successful software project in my own small software company (less than 5 people) where I was also the executive manger. The corresponding software was purchased by many Russian phone companies.

I know English and a little French.

I worked in USA (H1b visa only) and have the valid USA social security number.

Before 1993 I was a scientist and have Ph.D. in physics and mathematics.

After 1993 when the salary of the scientists in Russia dropped below the survival level (less than $100 /months) I became the Software Engineer.

Worked across the whole software -- in virtually all aspects of software design and implementation. I also worked with cross functional teams and as the project manager.

Besides C++ I also developed in Java.