server-client 프로그램

server-client.zip

간단한 서버 클라이언트 프로그램

1. 서버에서 왼쪽마우스를 클릭하여 accept함수를 구동시킴
2. 클라이언트에서 왼쪽마우스를 클릭하여 connect함수를 구동시킴

                                                           전송
결과 : 연결되고 나서 서버 -----------------------------> 클라이언트
                                                       "Hello World"

3. 클라이언트에서 오른쪽마우스를 클릭하여 화면에 문자열을 삭제
4. 다시 1~3번 과정을 반복하여 문자열을 화면에 표시
끝~~~~~~~~~~~~~~~~~~~~~

 

 

server 소스
#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>

void ErrorHandling(char* message);

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass=TEXT("Server");
void error_handling(char *message);

WSADATA wsaData;
SOCKET hServSock, hClntSock;  
SOCKADDR_IN servAddr, clntAddr;  

int szClntAddr;
char message[]="Hello World!";
HDC hdc;
HWND Hwnd;

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
    ,LPSTR lpszCmdParam,int nCmdShow)
{
 HWND hWnd;
 MSG Message;
 WNDCLASS WndClass;
 g_hInst=hInstance;
 
 WndClass.cbClsExtra=0;
 WndClass.cbWndExtra=0;
 WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 WndClass.hInstance=hInstance;
 WndClass.lpfnWndProc=WndProc;
 WndClass.lpszClassName=lpszClass;
 WndClass.lpszMenuName=NULL;
 WndClass.style=CS_HREDRAW | CS_VREDRAW;
 RegisterClass(&WndClass);

 hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
  NULL,(HMENU)NULL,hInstance,NULL);
 ShowWindow(hWnd,nCmdShow);
 
 while (GetMessage(&Message,NULL,0,0)) {
  TranslateMessage(&Message);
  DispatchMessage(&Message);
 }
 return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
 Hwnd = hWnd;
 switch (iMessage) {
  case WM_DESTROY:
   closesocket(hServSock);
   WSACleanup();
   PostQuitMessage(0);
   return 0;
  case WM_CREATE:
   hdc = GetDC(hWnd);
     if(WSAStartup(MAKEWORD(2, 2), &wsaData)!=0)
    ErrorHandling("WSAStartup() error!");
   
   hServSock=socket(PF_INET, SOCK_STREAM, 0);
   if(hServSock==INVALID_SOCKET)
    ErrorHandling("socket() error");
 
   memset(&servAddr, 0, sizeof(servAddr));
   servAddr.sin_family=AF_INET;
   servAddr.sin_addr.s_addr=htonl(INADDR_ANY);
   servAddr.sin_port=htons(atoi("8080"));
   
   if(bind(hServSock, (SOCKADDR*) &servAddr, sizeof(servAddr))==SOCKET_ERROR)
   {
    ErrorHandling("bind() error"); 
   
   }
   if(listen(hServSock, 5)==SOCKET_ERROR)
    ErrorHandling("listen() error");
   ReleaseDC(Hwnd, hdc);
   return 0;
  case WM_LBUTTONDOWN:
   szClntAddr=sizeof(clntAddr);     
   hClntSock=accept(hServSock, (SOCKADDR*)&clntAddr,&szClntAddr);
   if(hClntSock==INVALID_SOCKET)
    ErrorHandling("accept() error"); 
   
   send(hClntSock, message, sizeof(message), 0);
   closesocket(hClntSock);
   return 0;
  case WM_RBUTTONDOWN:
   
   return 0;
 }
 return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

void ErrorHandling(char* message)
{
 hdc = GetDC(Hwnd);
 TextOut(hdc, 200, 200, message, 5);
 ReleaseDC(Hwnd, hdc);
}

client 소스

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
void ErrorHandling(char* message);

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass=TEXT("Client");
WSADATA wsaData;
SOCKET hSocket;
SOCKADDR_IN servAddr;

char message[30];
TCHAR *message1 = "HellO!";
TCHAR *error = "error";
int strLen;
HDC hdc;

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
    ,LPSTR lpszCmdParam,int nCmdShow)
{
 HWND hWnd;
 MSG Message;
 WNDCLASS WndClass;
 g_hInst=hInstance;
 
 WndClass.cbClsExtra=0;
 WndClass.cbWndExtra=0;
 WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 WndClass.hInstance=hInstance;
 WndClass.lpfnWndProc=WndProc;
 WndClass.lpszClassName=lpszClass;
 WndClass.lpszMenuName=NULL;
 WndClass.style=CS_HREDRAW | CS_VREDRAW;
 RegisterClass(&WndClass);

 hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
  NULL,(HMENU)NULL,hInstance,NULL);
 ShowWindow(hWnd,nCmdShow);
 
 while (GetMessage(&Message,NULL,0,0)) {
  TranslateMessage(&Message);
  DispatchMessage(&Message);
 }
 return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{

 switch (iMessage) {
 case WM_DESTROY:
  WSACleanup();
  PostQuitMessage(0);
  return 0;
 case WM_CREATE:
  if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
  ErrorHandling("WSAStartup() error!"); 
  return 0;
 case WM_LBUTTONDOWN:
  hSocket=socket(PF_INET, SOCK_STREAM, 0);
  if(hSocket==INVALID_SOCKET)
   ErrorHandling("hSocketet() error");
  
  memset(&servAddr, 0, sizeof(servAddr));
  servAddr.sin_family=AF_INET;
  servAddr.sin_addr.s_addr=inet_addr("127.0.0.1");
  servAddr.sin_port=htons(atoi("8080"));
  hdc = GetDC(hWnd);
  if(connect(hSocket, (SOCKADDR*)&servAddr, sizeof(servAddr))==SOCKET_ERROR)
  {
   ErrorHandling("connect() error!");
   TextOut(hdc, 300, 300, error, 5);
  }
 
  strLen=recv(hSocket, message, sizeof(message)-1, 0);
  message1 = &message[0];
  TextOut(hdc, 100, 100, message1, strlen(message1));
  ReleaseDC(hWnd, hdc);
  closesocket(hSocket);
  return 0;
 case WM_RBUTTONDOWN:
  InvalidateRect(hWnd, NULL, TRUE);
  return 0;
 }
 return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}

 

void ErrorHandling(char* message)
{
 TextOut(hdc, 200, 200, error, 5);
}