#pragma comment(lib,"Ws2_32.lib"); 
#include <windows.h> 
#include <string> 
#include <iostream> 

using namespace std;

struct PACKET_INITIALIZE
{
	PACKET_INITIALIZE(unsigned int code, int reserved1, int reserved2) :
		Code(code),
		Reserved1(reserved1),
		Reserved2(reserved2) {}
		unsigned int Code;
		int Reserved1;
		int Reserved2;
};

struct PACKET_TEXTFRAGMENT
{
	PACKET_TEXTFRAGMENT(unsigned int code, unsigned int textlen, signed int charoffset) :
		Code(code),
		TextLen(textlen),
		CharOffset(charoffset) {}
		unsigned int Code;
		unsigned int TextLen;
		signed int CharOffset;
};

int main()
{
	WSADATA info;
	if (WSAStartup(MAKEWORD(2, 0), &info) != 0)
	{
		cout << "WinSock Error\n";
	}

	SOCKET gniazdo = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

	sockaddr_in serwer;
	serwer.sin_family = AF_INET;
	serwer.sin_addr.s_addr = inet_addr("192.168.0.46");
	serwer.sin_port = htons(5000);

	connect(gniazdo, (sockaddr*)&serwer, sizeof(serwer));

	//-------- cala zabawa zaczyna sie tutaj 
	PACKET_INITIALIZE start(0x12345678, 0, 0);
	PACKET_TEXTFRAGMENT msg(0x23456789, 0, 0);
	string buf;
	char odebrana[100];
	int liczba;
	int odebrane;

	send(gniazdo, (char*)&start, sizeof(start), 0);
	recv(gniazdo, (char*)&start, sizeof(start), 0);

	if (start.Code == 1)
	{
		do
		{
			cout << "Podaj tekst do szyfrowania/deszyfrowania : ";
			getline(cin, buf);  	 	 	
			if (buf == "") break;
			do
			{
				cout << "Wprowadz przesuniecie <-20,20> : ";
				cin >> liczba;  	 	 	 	getchar();
			} while ((liczba<-20) || (liczba>20));

			msg.Code = 0x23456789;
			msg.TextLen = buf.length();
			msg.CharOffset = liczba;

			send(gniazdo, (char*)&msg, sizeof(msg), 0);
			send(gniazdo, buf.c_str(), buf.length(), 0);

			recv(gniazdo, (char*)&msg, sizeof(msg), 0);
			if (msg.Code == 1)
			{
				odebrane = recv(gniazdo, odebrana, buf.length(), 0);
				odebrana[odebrane] = 0;
				cout << "Otrzymana odpowiedz: " << odebrane << endl;
			}
			else cout << "Brak odpowiedzi" << endl;
			cout << "--------------------------------------------------------------";
		} while (true);
	}
	else cout << "Serwer nie wyrazil zgody na polaczenie!\n";

	//-------- tutaj sie konczy, reszta to klasyk 
	shutdown(gniazdo, 2);  	closesocket(gniazdo);
	WSACleanup();

	return 0;
}