用C寫windows socket(Server)

參考資料:http://www.cnblogs.com/wmj/archive/2010/03/10/1682355.html

如果 用GCC編譯的話，編譯前，需要把WSock32.Lib和WS2_32.Lib複製到項目根目錄下的lib子目錄

注:

1. lib目錄爲自建

2. WSock32.Lib和WS2_32.Lib可以在VS目錄下找到

3.如果用VC，則需要用#pragma comment(lib,"Ws2_32.lib") 語句

header.h

#ifndef HEADER_H_INCLUDED
#define HEADER_H_INCLUDED

#include <stdio.h>
#include <stdlib.h>
#include <winsock2.h>
#include <winsock.h>
#include <windows.h>

void t1();

#endif // HEADER_H_INCLUDED

impl1.cpp

#include "header.h"

void t1()
{
	int i = 0;
	int res;
	int port = 8701;
	char* localIp = "192.168.2.23";
	const char* MESSAGE = "bye bye.";

	WSADATA lpWD;
	WORD version;

	SOCKET serverSock;
	SOCKET clientSock;

	SOCKADDR_IN server_address;
	SOCKADDR_IN client_address;

	int clientAddrLen;

	server_address.sin_family = AF_INET;
	server_address.sin_port = htons(port);
	server_address.sin_addr.s_addr = inet_addr(localIp);
	memset(server_address.sin_zero, 0x00, 0);

	version = MAKEWORD( 2, 1 );

	if(0 != WSAStartup(version, &lpWD))
	{
		fprintf(stderr, "error:call WSAStartup fail.");
		return;
	}

	//printf("==>socket desc:%s", lpWD.szDescription);
	serverSock = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

	//bind(ListeningSocket， (SOCKADDR *)&ServerAddr， sizeof(ServerAddr));
	res = bind(serverSock,(SOCKADDR*)&server_address, sizeof(server_address));
	if(0 != res)
	{
		fprintf(stderr, "error:socket bind fail.");
		return;
	}

	res = listen(serverSock, 10);
	if(0 != res)
	{
		fprintf(stderr, "error:listen fail.");
		return;
	}else{
		fprintf(stdout, "listen port:%d\n", port);
	}

	for(; i<3; i++)
	{
		clientAddrLen = sizeof(client_address);
		clientSock = accept(serverSock, (struct sockaddr*)&client_address, &clientAddrLen);
		send(clientSock, MESSAGE, strlen(MESSAGE), 0);
		closesocket(clientSock);
	}

	closesocket(serverSock);
	WSACleanup();
}

main.cpp

//#include <iostream>
//using namespace std;
#include "header.h"

int main()
{
	t1();
    //cout << "Hello world!" << endl;
    return 0;
}

makefile:

build_files= main.cpp impl1.cpp header.h
out_file=test

run:build
	$(out_file)

build:
	gcc -x c -o $(out_file) $(build_files) -Llib -lws2_32 -lwsock32

clean:
	del $(out_file)

Debug:
	gcc -x c -o $(out_file) $(build_files) -lws2_32

多線程版:

header.h

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <winsock2.h>
#include <winsock.h>
#include <windows.h>
#include <process.h>
#include <time.h>

VOID connectProcess1(PVOID pvoid);
void t4();

impl.cpp

#include "header.h"

VOID connectProcess1(PVOID pvoid)
{
	int i = 0;
	SOCKET clientConnect = *(SOCKET*) pvoid;
	char msg[256];

	fprintf(stdout, "client socket:%d\n", clientConnect);

	for(; i<100; i++)
	{
		sprintf(msg, "from:%d ,msg count:%d\n", clientConnect, i);
		send( clientConnect, msg, strlen(msg), 0);

		Sleep(200);
	}

	closesocket( clientConnect);
	free(pvoid);
}

void t4()
{
	int i = 0;
	int res;
	int port = 8701;
	const char* localIp = "192.168.2.23";

	WSADATA lpWD;
	WORD version;

	SOCKET serverSock;
	SOCKET clientSock;
	SOCKET clientSockClone;

	SOCKADDR_IN server_address;
	SOCKADDR_IN client_address;

	int clientAddrLen;

	server_address.sin_family = AF_INET;
	server_address.sin_port = htons(port);
	server_address.sin_addr.s_addr = inet_addr(localIp);
	memset(server_address.sin_zero, 0x00, 0);

	version = MAKEWORD( 1, 1 );

	if(0 != WSAStartup(version, &lpWD))
	{
		fprintf(stderr, "error:call WSAStartup fail.");
		return;
	}

	serverSock = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

	res = bind(serverSock,(SOCKADDR*)&server_address, sizeof(server_address));
	if(0 != res)
	{
		fprintf(stderr, "error:socket bind fail.");
		return;
	}

	res = listen(serverSock, 2);
	if(0 != res)
	{
		fprintf(stderr, "error:listen fail.");
		return;
	}else{
		fprintf(stdout, "listen port:%d\n", port);
	}

	clientAddrLen = sizeof(client_address);

	for(;;i++)
	{
		clientSock = accept(serverSock, (sockaddr*)&client_address, &clientAddrLen);
//		fprintf(stdout, "connect client number:%d\n", i);
		clientSockClone = clientSock;
		_beginthread (connectProcess1, 0, &clientSockClone) ;

		Sleep(50);
	}

	closesocket(serverSock);
	WSACleanup();
}