CP Socket编程 C/C++实现 （Windows Platform SDK）

CP Socket编程 C/C++实现 （Windows Platform SDK）收藏

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C语言TCP程序中的Hello World。以前一直用OO语言，现在用C语言写着玩，思想上有点转不过来弯，o(∩_∩)o...
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;

}

if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1)

//wsaData.wVersion!=0x0101

{

WSACleanup();

return;

}

//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();

}

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 = WSAStartup(wVersionRequested,&wsaData);

if(err!=0)

{

return;

}

if(LOBYTE(wsaData.wVersion)!=1 || HIBYTE(wsaData.wVersion)!=1)

//wsaData.wVersion!=0x0101

{

WSACleanup();

return;

}

//创建连向服务器的套接字

SOCKET sock = socket(AF_INET,SOCK_STREAM,0);

//创建地址信息

SOCKADDR_IN hostAddr;

hostAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

hostAddr.sin_family = AF_INET;

hostAddr.sin_port = htons(6000);

//连接服务器

connect(sock,(sockaddr*)&hostAddr,sizeof(sockaddr));

char revBuf[128];

//从服务器获得数据

recv(sock,revBuf,128,0);

printf("%s/n",revBuf);

//向服务器发送数据

send(sock,"Hello Host!",12,0);

closesocket(sock);

}