服务器端编程的步骤:
1:加载套接字库,创建套接字(WSAStartup()/socket());
2:绑定套接字到一个IP地址和一个端口上(bind());
3:将套接字设置为监听模式等待连接请求(listen());
4:请求到来后,接受连接请求,返回一个新的对应于此次连接的套接字(accept());
5:用返回的套接字和客户端进行通信(send()/recv());
6:返回,等待另一连接请求;
7:关闭套接字,关闭加载的套接字库(closesocket()/WSACleanup())。
服务器端代码如下:
#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 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);
}
}
客户端编程的步骤:#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 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);
}
}
1:加载套接字库,创建套接字(WSAStartup()/socket());
2:向服务器发出连接请求(connect());
3:和服务器端进行通信(send()/recv());
4:关闭套接字,关闭加载的套接字库(closesocket()/WSACleanup())。
客户端的代码如下:
#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();
}
#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();
}
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