Client：
1.链接dll
#pragma comment(lib,"Ws2_32.lib")
2.初始化套接字对象SOCKET，端口号，
3.DLL信息初始化
WSADATA wsaData; //DLL信息
WORD wVersionRequested; //版本号
wVersionRequested = MAKEWORD(1, 1); //计算版本号
err = WSAStartup(wVersionRequested, &wsaData);
if (err != 0) {
return -1; //初始化DLL失败
}
4.创建套接字
err = (sockClient = socket(AF_INET, SOCK_STREAM, 0));
if (err < 0) {
printf("create socket error: %s(errno: %d)\n\n", strerror(errno), errno);
return -1;
}
else
{
printf("create socket successful!\nnow connect ...\n\n");
}
5.连接目标主机端口
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr = inet_addr(IP);
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(PORT);
err = connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));
if (err < 0)
{
printf("connect error: %s(errno: %d)\n\n", strerror(errno), errno);
return -1;
}
else
{
printf("connect successful!\n\n");
return 1;
}
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