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Client.cpp
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Client.cpp
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#define WIN32_LEAN_AND_MEAN
//#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include "iostream"
using namespace std;
// Need to link with Ws2_32.lib, Mswsock.lib, and Advapi32.lib
#pragma comment (lib, "Ws2_32.lib")
#pragma comment (lib, "Mswsock.lib")
#pragma comment (lib, "AdvApi32.lib")
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "27015"
//localhost
int __cdecl main(int argc, char** argv)
{
WSADATA wsaData;
SOCKET ConnectSocket = INVALID_SOCKET;
struct addrinfo* result = NULL,
* ptr = NULL,
hints;
char recvbuf[DEFAULT_BUFLEN];
int iResult , iSendResult;
int recvbuflen = DEFAULT_BUFLEN;
char servername[20] = "";
printf("Please Enter server name: ");
cin >> servername;
// Validate the parameters
if (servername == " ") {
printf("usage server name\n");
return 1;
}
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
printf("WSAStartup failed with error: %d\n", iResult);
return 1;
}
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
// Resolve the server address and port
iResult = getaddrinfo(servername, DEFAULT_PORT, &hints, &result);
if (iResult != 0) {
printf("getaddrinfo failed with error: %d\n", iResult);
WSACleanup();
return 1;
}
// Attempt to connect to an address until one succeeds
for (ptr = result; ptr != NULL; ptr = ptr->ai_next) {
// Create a SOCKET for connecting to server
ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype,
ptr->ai_protocol);
if (ConnectSocket == INVALID_SOCKET) {
printf("socket failed with error: %ld\n", WSAGetLastError());
WSACleanup();
return 1;
}
// Connect to server.
iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen);
if (iResult == SOCKET_ERROR) {
closesocket(ConnectSocket);
ConnectSocket = INVALID_SOCKET;
continue;
}
break;
}
freeaddrinfo(result);
if (ConnectSocket == INVALID_SOCKET) {
printf("Unable to connect to server!\n");
WSACleanup();
return 1;
}
cout << "Enter message to <server>: ";
cin >> recvbuf;
// Send an initial buffer
iResult = send(ConnectSocket, recvbuf, (int)strlen(recvbuf), 0);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
// Receive until the peer closes the connection
char m[512];
do {
iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);
if (equal(recvbuf, recvbuf + 2, "by"))
{
cout << "Server has quit the session" << endl;
break;
}
cout << "Received ";
for (int i = 0; i < iResult; i++) {
cout << recvbuf[i];
}
cout << " from server" << endl;
cout << "\nEnter your message to server: ";
cin >> m;
char* message = m;
if (equal(m, m + 2, "by")) {
send(ConnectSocket, message, strlen(m), 0);
break;
}
iSendResult = send(ConnectSocket, message, strlen(m), 0);
if (iSendResult == SOCKET_ERROR)
{
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
cout << "\nwaiting server response..." << endl;
} while (1);
// shutdown the connection since no more data will be sent
iResult = shutdown(ConnectSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
printf("shutdown failed with error: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
// cleanup
closesocket(ConnectSocket);
WSACleanup();
return 0;
}