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server.cpp
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server.cpp
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#undef UNICODE
#define WIN32_LEAN_AND_MEAN
#include "pch.h"
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <string>
#include <vector>
#include <bitset>
#include <stdexcept>
//#include <random>
// Need to link with Ws2_32.lib
#pragma comment (lib, "Ws2_32.lib")
// #pragma comment (lib, "Mswsock.lib")
#define DEFAULT_BUFLEN 23 //23 bytse - 184 bits
class message {
public:
//std::string mes;
//std::bitset<280> pack;
//header
int oper; //2b: 00 - con_neg; 01 - 2arg_oper; 10 - factorial, 11 - history
int status; //3b: 000 - correct; 001 - incorrect_arg; 010 - result_beyond_the_scope; 011 - too_many_calculations_for_session; 100 - incorrect_session_id; 101 - incorrect_calculation_id; 110 - message_can't_be_read; 111 - server_internal_error;
long long data_length; //64b: data field in bits
//data
int s_id; //session id 8b
int c_id; //calculation id 8b
int history; //1b : (ONLY FOR oper = 11 and answer) 0 - two_arg_oper; 1 - factorial
int arg; //(ONLY FOR oper={01;11;10}) 32b
int arg2; //(ONLY FOR oper={01;11}) 32b
int two_arg_oper; //(ONLY FOR oper={01;11}) 2b: 00 - multiplication; 01 - division; 10 - addition; 11 - substraction
int result; //(ONLY FOR oper={01;10;11}) 32b
//constructors and destructors
message() : oper(0), status(0), data_length(0), two_arg_oper(0), arg(0), arg2(0), result(0), s_id(0), c_id(0), history(0) {}
message(char buffer[]) {
//unpack data from char[]
std::bitset<80> pak(0);
//first bit in pak
int temp = 79;
for (int i = 0; i < 10; i++) {
//divide into bytes
std::bitset<8> temp_bitset(buffer[i]);
for (int j = 7; j >= 0; j--) {
pak[temp] = temp_bitset[j];
temp--;
}
}
//unpack header fields
std::bitset<2> bs_oper(0);
std::bitset<3> bs_status(0);
std::bitset<64> bs_length(0);
for (int i = 79; i >= 78; i--) bs_oper[i - 78] = pak[i];
for (int i = 77; i >= 75; i--) bs_status[i - 75] = pak[i];
for (int i = 74; i >= 11; i--) bs_length[i - 11] = pak[i];
oper = static_cast<int>(bs_oper.to_ulong());
status = static_cast<int>(bs_status.to_ulong());
data_length = static_cast<long long>(bs_length.to_ulong());
//unpack data fields
std::bitset<8> bs_sid(0);
for (int i = 10; i >= 3; i--) bs_sid[i - 3] = pak[i];
s_id = static_cast<int>(bs_sid.to_ulong());
switch (oper) {
//con_neg - fields empty
case 0: {
c_id = arg = arg2 = two_arg_oper = result = history = 0;
if (s_id == 0) std::cout << "Otrzymano zadanie zakonczenia polaczenia: " << std::endl;
break;
}
//two_arg_oper - two_arg_oper, arg, arg2
case 1: {
std::bitset<72> pak2(0);
//first bit in pak
temp = 71;
for (int i = 9; i < 18; i++) {
//divide into bytes
std::bitset<8> temp_bitset(buffer[i]);
for (int j = 7; j >= 0; j--) {
pak2[temp] = temp_bitset[j];
temp--;
}
}
std::bitset<32> bs_arg(0);
for (int i = 66; i >= 35; i--) bs_arg[i - 35] = pak2[i];
arg = static_cast<int>(bs_arg.to_ulong());
std::bitset<32> bs_arg2(0);
for (int i = 34; i >= 3; i--) bs_arg2[i - 3] = pak2[i];
arg2 = static_cast<int>(bs_arg2.to_ulong());
std::bitset<2> bs_tao(0);
for (int i = 2; i >= 1; i--) bs_tao[i - 1] = pak2[i];
two_arg_oper = static_cast<int>(bs_tao.to_ulong());
c_id = result = history = 0;
std::cout << "Otrzymano zadanie wykonania ";
switch (two_arg_oper) {
case 0: std::cout << "mnozenia "; break;
case 1: std::cout << "dzielenia "; break;
case 2: std::cout << "dodawania "; break;
case 3: std::cout << "odejmowania "; break;
}
std::cout << "liczb " << arg << " oraz " << arg2 << std::endl;
break;
}
//factorial - arg
case 2: {
std::bitset<40> pak2(0);
//first bit in pak
temp = 39;
for (int i = 9; i < 14; i++) {
//divide into bytes
std::bitset<8> temp_bitset(buffer[i]);
for (int j = 7; j >= 0; j--) {
pak2[temp] = temp_bitset[j];
temp--;
}
}
std::bitset<32> bs_arg(0);
for (int i = 34; i >= 3; i--) bs_arg[i - 3] = pak2[i];
arg = static_cast<int>(bs_arg.to_ulong());
c_id = arg2 = two_arg_oper = result = history = 0;
std::cout << "Otrzymano zadanie obliczenia silni dla " << arg << std::endl;
break;
}
//history - fields empty
case 3: {
std::bitset<16> pak2(0);
//first bit in pak
temp = 15;
for (int i = 9; i < 11; i++) {
//divide into bytes
std::bitset<8> temp_bitset(buffer[i]);
for (int j = 7; j >= 0; j--) {
pak2[temp] = temp_bitset[j];
temp--;
}
}
std::bitset<8> bs_cid(0);
for (int i = 10; i >= 3; i--) bs_cid[i - 3] = pak2[i];
c_id = static_cast<int>(bs_cid.to_ulong());
arg = arg2 = two_arg_oper = result = 0;
std::cout << "Otrzymano zadanie wyswietlenia historii" << std::endl;
break;
}
}
}
~message() {}
//pack data to string
std::string pack_to_string() {
//char temp_ch = 0;
//any errors
if (status == 0) {
//match message form to type of operation
switch (oper) {
//con_neg
case 0: {
//all fields into one bitset
std::bitset<80> pak(std::string(std::bitset<2>(oper).to_string() + std::bitset<3>(status).to_string() +
std::bitset<64>(data_length).to_string() + std::bitset<8>(s_id).to_string() + "000"));
std::string temp;
std::bitset<8> tempBitset(0);
//podział dużego bitsetu na bajty
for (int i = pak.size() - 1; i >= 0; i--)
{
tempBitset[i % 8] = pak[i];
if (i % 8 == 0)
{
//zamiana bajtów na chary
char t = static_cast<char> (tempBitset.to_ulong());
//łączenie w pojedynczy string
temp.push_back(t);
}
}
return temp;
}
case 1: {//2arg_oper
//all fields into one bitset
std::bitset<120> pak(std::string(std::bitset<2>(oper).to_string() + std::bitset<3>(status).to_string() +
std::bitset<64>(data_length).to_string() + std::bitset<8>(s_id).to_string() + std::bitset<8>(c_id).to_string() +
std::bitset<32>(result).to_string() + "000"));
std::string temp;
std::bitset<8> tempBitset(0);
//podział dużego bitsetu na bajty
for (int i = pak.size() - 1; i >= 0; i--)
{
tempBitset[i % 8] = pak[i];
if (i % 8 == 0)
{
//zamiana bajtów na chary
char t = static_cast<char> (tempBitset.to_ulong());
//łączenie w pojedynczy string
temp.push_back(t);
}
}
return temp;
}
case 2: {//factorial
//all fields into one bitset
std::bitset<120> pak(std::string(std::bitset<2>(oper).to_string() + std::bitset<3>(status).to_string() +
std::bitset<64>(data_length).to_string() + std::bitset<8>(s_id).to_string() + std::bitset<8>(c_id).to_string()) +
std::bitset<32>(result).to_string() + "000");
std::string temp;
std::bitset<8> tempBitset(0);
//podział dużego bitsetu na bajty
for (int i = pak.size() - 1; i >= 0; i--)
{
tempBitset[i % 8] = pak[i];
if (i % 8 == 0)
{
//zamiana bajtów na chary
char t = static_cast<char> (tempBitset.to_ulong());
//łączenie w pojedynczy string
temp.push_back(t);
}
}
return temp;
}
case 3: {//history
//all fields into one bitset
//for two_arg_oper
if (history == 0) {
std::bitset<184> pak(std::string(std::bitset<2>(oper).to_string() + std::bitset<3>(status).to_string() +
std::bitset<64>(data_length).to_string() + std::bitset<8>(s_id).to_string() + std::bitset<8>(c_id).to_string()) +
std::bitset<1>(history).to_string() + std::bitset<32>(arg).to_string() + std::bitset<32>(arg2).to_string() +
std::bitset<2>(two_arg_oper).to_string() + std::bitset<32>(result).to_string());
std::string temp;
std::bitset<8> tempBitset(0);
//podział dużego bitsetu na bajty
for (int i = pak.size() - 1; i >= 0; i--)
{
tempBitset[i % 8] = pak[i];
if (i % 8 == 0)
{
//zamiana bajtów na chary
char t = static_cast<char> (tempBitset.to_ulong());
//łączenie w pojedynczy string
temp.push_back(t);
}
}
return temp;
}
//for factorial oper
else if (history == 1) {
std::bitset<152> pak(std::string(std::bitset<2>(oper).to_string() + std::bitset<3>(status).to_string() +
std::bitset<64>(data_length).to_string() + std::bitset<8>(s_id).to_string() + std::bitset<8>(c_id).to_string()) +
std::bitset<1>(history).to_string() + std::bitset<32>(arg).to_string() + std::bitset<32>(result).to_string() +
"00");
std::string temp;
std::bitset<8> tempBitset(0);
//podział dużego bitsetu na bajty
for (int i = pak.size() - 1; i >= 0; i--)
{
tempBitset[i % 8] = pak[i];
if (i % 8 == 0)
{
//zamiana bajtów na chary
char t = static_cast<char> (tempBitset.to_ulong());
//łączenie w pojedynczy string
temp.push_back(t);
}
}
return temp;
}
}
}
}
else {//error occur
//all fields into one bitset
std::bitset<80> pak(std::string(std::bitset<2>(oper).to_string() + std::bitset<3>(status).to_string() +
std::bitset<64>(data_length).to_string() + std::bitset<8>(s_id).to_string() + "000"));
std::string temp;
std::bitset<8> tempBitset(0);
//podział dużego bitsetu na bajty
for (int i = pak.size() - 1; i >= 0; i--)
{
tempBitset[i % 8] = pak[i];
if (i % 8 == 0)
{
//zamiana bajtów na chary
char t = static_cast<char> (tempBitset.to_ulong());
//łączenie w pojedynczy string
temp.push_back(t);
}
}
std::cout << "Podczas pracy serwera wystapil blad." << std::endl;
return temp;
}
}
};
class session {
public:
int user_id; //user id
int s_id; //session id
int last; //last index
std::vector<message> history; //operations, c_id-1 = index
};
int __cdecl main()
{
std::vector<ULONG> users_table; //IP(value) -> user id(index)
std::vector<session> sessions_container; //all sessions
int session_id = 1;
int calculation_id = 1;
WSADATA wsaData;
SOCKET ClientSocket = INVALID_SOCKET;
int iResult;
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
printf("WSAStartup failed with error: %d\n", iResult);
return 1;
}
// Create a client socket
ClientSocket = socket(AF_INET, SOCK_DGRAM, 0);
if (ClientSocket == INVALID_SOCKET) {
printf("socket failed with error: %ld\n", WSAGetLastError());
WSACleanup();
return 1;
}
sockaddr_in service, client;
service.sin_family = AF_INET;
service.sin_port = htons(1234);
service.sin_addr.s_addr = INADDR_ANY;
char buffer[DEFAULT_BUFLEN];
int len = sizeof(sockaddr_in);
// Setup the UDP socket
iResult = bind(ClientSocket, (sockaddr*)&service, len);
if (iResult == SOCKET_ERROR) {
printf("bind failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
//waiting for request
iResult = recvfrom(ClientSocket, buffer, DEFAULT_BUFLEN, 0, (sockaddr*)&client, &len);
if (iResult == SOCKET_ERROR) {
printf("recv failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
message* request = new message(buffer);
std::cout << "Otrzymano zadanie nawiazania polaczenia" << std::endl;
//matching user id an creating new session
session new_session;
bool found = false;
ULONG ip_addr = client.sin_addr.s_addr;
//checking in the users_table
for (int i = 0; i < users_table.size(); i++) {
if (users_table[i] == ip_addr) {
found = true;
new_session.user_id = i;
break;
}
}
//initialize new session and if there is a need, update users table
if (found) {
new_session.s_id = session_id;
new_session.last = 0;
}
else {
new_session.user_id = users_table.size();
users_table.push_back(ip_addr);
new_session.s_id = session_id;
new_session.last = 0;
}
session_id++;
//create accept answer for request
message* answer = new message();
answer->oper = 0;
answer->status = 0;
answer->data_length = 8;
answer->s_id = new_session.s_id;
//send accept answer
std::string temp_str = answer->pack_to_string();
memcpy(buffer, temp_str.c_str(), 10);
iResult = sendto(ClientSocket, buffer, 10, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
sessions_container.push_back(new_session);
bool end = false;
//connection
do {
//waiting for request
iResult = recvfrom(ClientSocket, buffer, DEFAULT_BUFLEN, 0, (sockaddr*)&client, &len);
if (iResult == SOCKET_ERROR) {
printf("recv failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
//calculating and update history
request = new message(buffer);
answer = new message();
switch (request->oper) {
//end communication
case 0: {
answer->oper = 0;
answer->status = 0;
answer->data_length = 8;
answer->s_id = new_session.s_id;
end = true;
break;
}
//calculate two_arg_oper
case 1: {
answer->oper = 1;
switch (request->two_arg_oper) {
//multipilcation
case 0: {
//result beyond the scope
//wynik poza zakresem
if ((request->arg == -1) && (request->arg2 == INT_MIN)) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if ((request->arg2 == -1) && (request->arg == INT_MIN)) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if (request->arg > INT_MAX / request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if (request->arg < INT_MIN / request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//too many calculations (max 255 per session)
else if (calculation_id == 255) {
answer->status = 3;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else {
answer->status = 0;
answer->data_length = 48;
int temp_int = request->arg * request->arg2;
answer->result = (request->arg * request->arg2);
answer->s_id = new_session.s_id;
answer->c_id = calculation_id;
}
break;
}
//division
case 1: {
//dzielenie przez 0
if (request->arg2 == 0) {
answer->status = 1;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//wynik poza zakresem
else if (request->arg > INT_MAX * request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if (request->arg < INT_MIN * request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//przekroczony limit obliczen
else if (calculation_id == 255) {
answer->status = 3;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//mozna poprawnie wykonac operacje
else {
answer->status = 0;
answer->data_length = 48;
answer->result = (request->arg / request->arg2);
answer->s_id = new_session.s_id;
answer->c_id = calculation_id;
}
break;
}
//addition
case 2: {
//wynik poza zakresem
if (request->arg > (INT_MAX - request->arg2)) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if (request->arg < INT_MIN + request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//przekroczony limit obliczen
else if (calculation_id == 255) {
answer->status = 3;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//mozna poprawnie wykonac operacje
else {
answer->status = 0;
answer->data_length = 48;
answer->result = (request->arg + request->arg2);
answer->s_id = new_session.s_id;
answer->c_id = calculation_id;
}
break;
}
//substraction
case 3: {
//wynik poza zakresem
if (request->arg > INT_MAX + request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if (request->arg < INT_MIN + request->arg2) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//przekroczony limit obliczen
if (calculation_id == 255) {
answer->status = 3;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
//mozna poprawnie wykonac operacje
else {
answer->status = 0;
answer->data_length = 48;
answer->result = (request->arg - request->arg2);
answer->s_id = new_session.s_id;
answer->c_id = calculation_id;
}
break;
}
}
break;
}
//calculate factorial
case 2: {
answer->oper = 2;
if (((request->arg) > 12) || (request->arg < 0)) {
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else if (calculation_id == 255) {
answer->status = 3;
answer->data_length = 8;
answer->s_id = new_session.s_id;
}
else {
int factorial = 1;
std::cout << "arg: " << request->arg << std::endl;
for (int i = 1; i <= request->arg; i++) { factorial *= i; }
answer->status = 0;
answer->data_length = 48;
answer->result = factorial;
answer->s_id = new_session.s_id;
answer->c_id = calculation_id;
}
break;
}
//send history
case 3: {
answer->oper = 3;
std::cout << "Dlugosc wektora: " << sessions_container.size() << std::endl;
std::cout << "Ilosc dzialan: " << new_session.last << std::endl;
int ses = request->s_id;
bool ses_found = false;
//checking the session_id from the request in the session_container
for (session s : sessions_container) {
if (s.s_id == ses) {
ses_found = true;
//checking user_id
if (new_session.user_id == s.user_id) {
//request of view the whole history
if (request->c_id == 0) {
for (message &m : s.history) {
answer->status = 0;
answer->s_id = m.s_id;
answer->c_id = m.c_id;
//two_arg_oper
if (m.oper == 1) {
answer->history = 0;
answer->data_length = 115;
answer->arg = m.arg;
answer->arg2 = m.arg2;
answer->two_arg_oper = m.two_arg_oper;
answer->result = m.result;
temp_str = answer->pack_to_string();
//send one calculation
memcpy(buffer, temp_str.c_str(), 23);
iResult = sendto(ClientSocket, buffer, 23, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
//factorial
else if (m.oper == 2) {
answer->history = 1;
answer->data_length = 81;
answer->arg = m.arg;
answer->result = m.result;
temp_str = answer->pack_to_string();
//send one calculation
memcpy(buffer, temp_str.c_str(), 19);
iResult = sendto(ClientSocket, buffer, 19, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
}
//at the end send the message with beyond the scope error
answer->status = 2;
answer->data_length = 8;
answer->s_id = new_session.s_id;
temp_str = answer->pack_to_string();
memcpy(buffer, temp_str.c_str(), 10);
iResult = sendto(ClientSocket, buffer, 10, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
//request of view only one calculation
else {
bool calc_found = false;
for (message m : s.history) {
if (m.c_id == request->c_id) {
answer->status = 0;
answer->s_id = m.s_id;
answer->c_id = m.c_id;
//two_arg_oper
if (m.oper == 1) {
answer->history = 0;
answer->data_length = 115;
answer->arg = m.arg;
answer->arg2 = m.arg2;
answer->two_arg_oper = m.two_arg_oper;
answer->result = m.result;
temp_str = answer->pack_to_string();
//send one calculation
memcpy(buffer, temp_str.c_str(), 23);
iResult = sendto(ClientSocket, buffer, 23, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
//factorial
else {
answer->history = 1;
answer->data_length = 81;
answer->arg = m.arg;
answer->result = m.result;
temp_str = answer->pack_to_string();
//send one calculation
memcpy(buffer, temp_str.c_str(), 19);
iResult = sendto(ClientSocket, buffer, 19, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
calc_found = true;
break;
}
}
//calculation not found
if (!calc_found) {
answer->status = 5;
answer->data_length = 8;
answer->s_id = new_session.s_id;
temp_str = answer->pack_to_string();
memcpy(buffer, temp_str.c_str(), 10);
iResult = sendto(ClientSocket, buffer, 10, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
}
break;
}
//other user session
else {
answer->status = 4;
answer->data_length = 8;
answer->s_id = new_session.s_id;
temp_str = answer->pack_to_string();
memcpy(buffer, temp_str.c_str(), 10);
iResult = sendto(ClientSocket, buffer, 10, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
break;
}
}
//session not found
if (!ses_found) {
answer->status = 4;
answer->data_length = 8;
answer->s_id = new_session.s_id;
temp_str = answer->pack_to_string();
memcpy(buffer, temp_str.c_str(), 10);
iResult = sendto(ClientSocket, buffer, 10, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
}
}
//answer for request for operations other than history
if (answer->oper != 3) {
temp_str = answer->pack_to_string();
if (answer->oper == 0) {
memcpy(buffer, temp_str.c_str(), 10);
iResult = sendto(ClientSocket, buffer, 10, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
else if (answer->oper == 1) {
memcpy(buffer, temp_str.c_str(), 15);
iResult = sendto(ClientSocket, buffer, 15, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
else if (answer->oper == 2) {
memcpy(buffer, temp_str.c_str(), 15);
iResult = sendto(ClientSocket, buffer, 15, 0, (sockaddr*)&client, len);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
}
}
//update history if oper = 1 or 2 and thera was any errors
if (((request->oper == 1) || (request->oper == 2)) && (answer->status == 0)) {
if (request->oper == 1) {
message* temp = answer;
temp->history = 0;
temp->arg = request->arg;
temp->arg2 = request->arg2;
temp->two_arg_oper = request->two_arg_oper;
new_session.history.push_back(*temp);
}
else if (request->oper == 2) {
message* temp = answer;
temp->history = 1;
temp->arg = request->arg;
new_session.history.push_back(*temp);
}
new_session.last++;
bool temp = false;
for (session &s : sessions_container) {
if (s.s_id == new_session.s_id) {
s = new_session;
s.history = new_session.history;
temp = true;
break;
}
}
if (!temp)sessions_container.push_back(new_session);
calculation_id++;
}
} while (!end);
printf("Connection closed\n");
//session_id for next session
session_id++;
//clear calculation_id for next session
calculation_id = 1;
// cleanup
closesocket(ClientSocket);
WSACleanup();
return 0;
}