서버
/*
## 소켓 서버 : 1 v n - multithread
1. socket() : 소켓생성
2. bind() : 소켓설정
3. listen() : 수신대기열생성
4. accept() : 연결대기
*. CreateThread : 스레드 생성
5. read()&write()
WIN recv()&send : 데이터 읽고쓰기
6. close()
WIN closesocket : 소켓종료
*/
#include "stdafx.h"
#include <winsock2.h>
#pragma comment(lib, "Ws2_32.lib")
#define MAX_BUFFER 1024
#define SERVER_PORT 3500
DWORD WINAPI makeThread(void *data);
int _tmain(int argc, _TCHAR* argv[])
{
// Winsock Start - windock.dll 로드
WSADATA WSAData;
if (WSAStartup(MAKEWORD(2, 2), &WSAData) != 0)
{
printf("Error - Can not load 'winsock.dll' file\n");
return 1;
}
// 1. 소켓생성
SOCKET listenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listenSocket == INVALID_SOCKET)
{
printf("Error - Invalid socket\n");
return 1;
}
// 서버정보 객체설정
SOCKADDR_IN serverAddr;
memset(&serverAddr, 0, sizeof(SOCKADDR_IN));
serverAddr.sin_family = PF_INET;
serverAddr.sin_port = htons(SERVER_PORT);
serverAddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
// 2. 소켓설정
if (bind(listenSocket, (struct sockaddr*)&serverAddr, sizeof(SOCKADDR_IN)) == SOCKET_ERROR)
{
printf("Error - Fail bind\n");
// 6. 소켓종료
closesocket(listenSocket);
// Winsock End
WSACleanup();
return 1;
}
// 3. 수신대기열생성
if (listen(listenSocket, 5) == SOCKET_ERROR)
{
printf("Error - Fail listen\n");
// 6. 소켓종료
closesocket(listenSocket);
// Winsock End
WSACleanup();
return 1;
}
// 연결대기 정보변수 선언
SOCKADDR_IN clientAddr;
int addrLen = sizeof(SOCKADDR_IN);
memset(&clientAddr, 0, addrLen);
SOCKET clientSocket;
// thread Handle 선언
HANDLE hThread;
while (1)
{
// 4. 연결대기
clientSocket = accept(listenSocket, (struct sockaddr *)&clientAddr, &addrLen);
hThread = CreateThread(NULL, 0, makeThread, (void *)clientSocket, 0, NULL);
CloseHandle(hThread);
}
// 6-2. 리슨 소켓종료
closesocket(listenSocket);
// Winsock End
WSACleanup();
return 0;
}
DWORD WINAPI makeThread(void *data)
{
SOCKET socket = (SOCKET)data;
// 5-1. 데이터 읽기
char messageBuffer[MAX_BUFFER];
int receiveBytes;
while (receiveBytes = recv(socket, messageBuffer, MAX_BUFFER, 0))
{
if (receiveBytes > 0)
{
printf("TRACE - Receive message : %s (%d bytes)\n", messageBuffer, receiveBytes);
// 5-2. 데이터 쓰기
int sendBytes = send(socket, messageBuffer, strlen(messageBuffer), 0);
if (sendBytes > 0)
{
printf("TRACE - Send message : %s (%d bytes)\n", messageBuffer, sendBytes);
}
}
else
{
break;
}
}
closesocket(socket);
return 0;
}
클라이언트
/*
## 소켓 서버 : 1 v n - multithread
1. socket() : 소켓생성
2. connect() : 연결요청
3. read()&write()
WIN recv()&send : 데이터 읽고쓰기
4. close()
WIN closesocket : 소켓종료
*/
#include "stdafx.h"
#include <winsock2.h>
#pragma comment(lib, "Ws2_32.lib")
#define MAX_BUFFER 1024
#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 3500
int _tmain(int argc, _TCHAR* argv[])
{
// Winsock Start - winsock.dll 로드
WSADATA WSAData;
if (WSAStartup(MAKEWORD(2, 0), &WSAData) != 0)
{
printf("Error - Can not load 'winsock.dll' file\n");
return 1;
}
// 1. 소켓생성
SOCKET listenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (listenSocket == INVALID_SOCKET)
{
printf("Error - Invalid socket\n");
return 1;
}
// 서버정보 객체설정
SOCKADDR_IN serverAddr;
memset(&serverAddr, 0, sizeof(SOCKADDR_IN));
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(SERVER_PORT);
serverAddr.sin_addr.S_un.S_addr = inet_addr(SERVER_IP);
// 2. 연결요청
if (connect(listenSocket, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR)
{
printf("Error - Fail to connect\n");
// 4. 소켓종료
closesocket(listenSocket);
// Winsock End
WSACleanup();
return 1;
}
else
{
printf("Server Connected\n* Enter Message\n->");
}
while (1)
{
// 메시지 입력
char messageBuffer[MAX_BUFFER];
int i, bufferLen;
for (i = 0; 1; i++)
{
messageBuffer[i] = getchar();
if (messageBuffer[i] == '\n')
{
messageBuffer[i++] = '\0';
break;
}
}
bufferLen = i;
// 3-1. 데이터 쓰기
int sendBytes = send(listenSocket, messageBuffer, bufferLen, 0);
if (sendBytes > 0)
{
printf("TRACE - Send message : %s (%d bytes)\n", messageBuffer, sendBytes);
// 3-2. 데이터 읽기
int receiveBytes = recv(listenSocket, messageBuffer, MAX_BUFFER, 0);
if (receiveBytes > 0)
{
printf("TRACE - Receive message : %s (%d bytes)\n* Enter Message\n->", messageBuffer, receiveBytes);
}
}
}
// 4. 소켓종료
closesocket(listenSocket);
// Winsock End
WSACleanup();
return 0;
}