sockets(套接字)编程有三种,流式套接字(SOCK_STREAM),数据报套接字(SOCK_DGRAM),原始套接字(SOCK_RAW);
基于TCP的socket编程是采用的流式套接字。
第一式: 加载/释放Winsock库:
1.加载方法:
WSADATA wsa;
/*初始化socket资源*/
if (WSAStartup(MAKEWORD(1,1),&wsa) != 0)
{
return; //代表失败
}
2.释放方法:
WSACleanup();
第二式: 构造SOCKET:
1.服务端:构造监听SOCKET,流式SOCKET.
SOCKET Listen_Sock = socket(AF_INET, SOCK_STREAM, 0)
2.客户端:构造通讯SOCKET,流式SOCKET.
SOCKET Client_Sock = socket(AF_INET, SOCK_STREAM, 0)
第三式:配置监听地址和端口:
1.服务端: SOCKADDR_IN serverAddr
ZeroMemory((char *)&serverAddr,sizeof(serverAddr));
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(1234); /*本地监听端口:1234*/
serverAddr.sin_addr.s_addr = htonl(INADDR_ANY); /*有IP*/
第四式: 绑定SOCKET:
1.服务端:绑定监听SOCKET.
bind(Listen_Sock,(struct sockaddr *)&serverAddr,sizeof(serverAddr))
第五式: 服务端/客户端连接:
1.服务端:等待客户端接入.
SOCKET Command_Sock = accept(Listen_Sock, ...)
2.客户端:请求与服务端连接.
int ret = connect(Client_Sock, ...)
第六式: 收/发数据:
1.服务端:等待客户端接入.char buf[1024].
接收数据:recv(Command_Sock,buf, ...)
或
发送数据:send(Command_Sock,buf, ...)
2.客户端:请求与服务端连接.char buf[1024].
发送数据:send(Client_Sock,buf, ...)
或
接收数据:recv(Client_Sock,buf, ...)
第七式: 关闭SOCKET:
1.服务端:关闭SOCKET.
closesocket(Listen_Sock)
closesocket(Command_Sock)
2.客户端:关闭SOCKET.
closesocket(Client_Sock)
1.Server.cpp
#include <stdio.h> #include <Winsock2.h> #pragma comment(lib,"WS2_32.lib") void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1,1); err = WSAStartup(wVersionRequested,&wsaData); if (err !=0) { return; } if (LOBYTE(wsaData.wVersion) != 1|| HIBYTE( wsaData.wVersion ) != 1 ) { WSACleanup(); return; } SOCKET sockSrv = socket(AF_INET,SOCK_STREAM,0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); listen(sockSrv,5); SOCKADDR_IN addrClient; int len=sizeof(SOCKADDR); while(1) { SOCKET sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len); char sendBuf[50]; sprintf(sendBuf,"Welcome %s to here!",inet_ntoa(addrClient.sin_addr)); send(sockConn,sendBuf,strlen(sendBuf)+1,0); char recvBuf[50]; recv(sockConn,recvBuf,50,0); printf("%s\n",recvBuf); closesocket(sockConn); } }2.Client.cpp
#include <stdio.h> #include <Winsock2.h> void main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD( 1, 1 ); err = WSAStartup( wVersionRequested, &wsaData ); if ( err != 0 ) { return; } if ( LOBYTE( wsaData.wVersion ) != 1 || HIBYTE( wsaData.wVersion ) != 1 ) { WSACleanup( ); return; } SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1"); addrSrv.sin_family=AF_INET; addrSrv.sin_port=htons(6000); connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR)); send(sockClient,"hello",strlen("hello")+1,0); char recvBuf[50]; recv(sockClient,recvBuf,50,0); printf("%s\n",recvBuf); closesocket(sockClient); WSACleanup(); }
引用博客:http://www.cnblogs.com/Sniper-quay/archive/2011/06/22/2086636.html