TCP/IP Hello World-server source

from 통신 2009/09/09 11:11
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>

void ErrorHandling(char *message);

int main(int argc, char* argv[])
{
WSADATA wsaData;
SOCKET hServSock;
SOCKET hClntSock;
SOCKADDR_IN servAddr;
SOCKADDR_IN clntAddr;
int szClntAddr;
char message[] = "Hello World!\n";

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); //서버 소켓생성
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]));

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

if(listen(hServSock,5) == SOCKET_ERROR) //연결 요청 대기 상태
ErrorHandling("listen() error");

szClntAddr = sizeof(clntAddr);
hClntSock = accept(hServSock, (SOCKADDR*)&clntAddr, &szClntAddr); // 연결 요청 수락
if(hClntSock == INVALID_SOCKET)
ErrorHandling("accept() error");

send(hClntSock, message, sizeof(message),0); // 데이터 전송

closesocket(hClntSock); //연결 종료
WSACleanup();
return 0;
}

void ErrorHandling(char *message)
{
fputs(message, stderr);
fputc('\n', stderr);
exit(1);
}
2009/09/09 11:11 2009/09/09 11:11
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