TCP（SOCKETS）编程 C/C++实现

通信
Server：
#pragma comment(lib, "ws2_32.lib")
#include <Winsock2.h>
#include <stdio.h>

void main()
{
//版本协商
WORD wVersionRequested;
WSADATA wsaData;
int err;

wVersionRequested = MAKEWORD(1,1); //0x0101
err = WSAStartup(wVersionRequested,&wsaData);

if(err!=0)
{
return 0;
}

if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1) //wsaData.wVersion!=0x0101
{
WSACleanup();
return 0;
}

//创建Socket
SOCKET sockSvr = socket(AF_INET,SOCK_STREAM,0);

//创建IP地址和端口
SOCKADDR_IN addrSvr;

addrSvr.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
addrSvr.sin_family = AF_INET;
addrSvr.sin_port = htons(6000);

//绑定端口监听
bind(sockSvr,(SOCKADDR*)&addrSvr,sizeof(SOCKADDR));
listen(sockSvr,5);

sockaddr_in addrClient;
int len = sizeof(sockaddr);

while(true)
{
//阻塞方法，获得一个客户Socket连接
SOCKET sockConn = accept(sockSvr,(sockaddr*)&addrClient,&len);
char sendbuffer[128];
sprintf(sendbuffer,"Welcom %s!",inet_ntoa(addrClient.sin_addr));

//向客户Socket发送数据
send(sockConn,sendbuffer,strlen(sendbuffer)+1,0);
char recvbuffer[128];

//从客户Soc接受数据
recv(sockConn,recvbuffer,128,0);
printf("%s\n",recvbuffer);

//关闭Socket
closesocket(sockConn);
}

closesocket(sockSvr);

//释放Winsock资源
WSACleanup();
return 0;
}
client：
#pragma comment (lib,"ws2_32.lib")
#include <Winsock2.h>
#include <stdio.h>

void main()
{
//版本协商
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD(1,1); //0x0101
err = WSAStar