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• ws2_32.lib 라이브러리 추가

 

VS2013이상

솔루션 → 프로젝트 → 속성 → 구성 속성  → 링커 →  입력  → 추가 종속성  →  ws2_32.lib 추가

 

 

 

 

Server_Window

#include <stdio.h>
#include <stdlib.h>
#include <WinSock2.h>
#include <windows.h>

void ErrorHandling(char* message);

int main(int argc, char* argv[])
{
	WSADATA	wsaData;
	SOCKET hServSock, hClntSock;
	SOCKADDR_IN servAddr, clntAddr;

	int szClntAddr;
	char message[] = "Hello World!";
	if (argc != 2)
	{
		printf("Usage : %s <port>\n", argv[0]);
		exit(1);
	}

	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(argv[1]));

	if(bind(hServSock, (SOCKADDR*)&servAddr, sizeof(servAddr))==SOCKET_ERROR)
		ErrorHandling("bind() error");

	if(listen(hServSock, 5)==SOCKET_ERROR)
		ErrorHandling("listen() error");
	
	szClntAddr = sizeof(clntAddr);
	hClntSock = accept(hServSock, (SOCKADDR*)&clntAddr, &szClntAddr);
	if (hClntSock == INVALID_SOCKET)
		ErrorHandling("accept() error");

	send(hClntSock, message, sizeof(message), 0);
	closesocket(hClntSock);
	closesocket(hServSock);
	WSACleanup();
	return 0;
}

void ErrorHandling(char* message)
{
	fputs(message, stderr);
	fputc('\n', stderr);
	exit(1);
}

 

Client_Window

#include <stdio.h>
#include <stdlib.h>
#include <WinSock2.h>
#include <windows.h>

void ErrorHandling(char* message);

int main(int argc, char* argv[])
{
	WSADATA(wsaData);
	SOCKET hSocket;
	SOCKADDR_IN servAddr;

	char message[30];
	int strLen;
	if (argc != 3)
	{
		printf("Usage : %s <IP> <port>\n", argv[0]);
		exit(1);
	}

	if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
		ErrorHandling("WSAStartup() Error!");

	hSocket = socket(PF_INET, SOCK_STREAM, 0);
	if (hSocket == INVALID_SOCKET)
		ErrorHandling("socket() Error");

	memset(&servAddr, 0, sizeof(servAddr));
	servAddr.sin_family = AF_INET;
	//servAddr.sin_addr.s_addr = InetPtonW("127.0.0.1");
	//inet_pton(AF_INET, "127.0.0.1", &(servAddr.sin_addr.s_addr));
	servAddr.sin_port = htons(atoi("9190"));

	if (connect(hSocket, (SOCKADDR*)&servAddr, sizeof(servAddr)) == SOCKET_ERROR)
		ErrorHandling("connect() Error!");

	strLen = recv(hSocket, message, sizeof(message) - 1, 0);
	if (strLen == -1)
		ErrorHandling("read() Error!");

	printf("Message from server: %s \n", message);

	closesocket(hSocket);
	WSACleanup();
	return 0;

}

void ErrorHandling(char* message)
{
	fputs(message, stderr);
	fputc('\n', stderr);
	exit(1);
}