网络连接（二）

来源：互联网发布：连点器的编程编辑：程序博客网时间：2024/05/16 10:52

说明：实现简单的TCP网络连接，服务器与客户端回声。

—————————————-服务器—————————————-
文件名称：Server.c
运行方式：命令行

#include <stdio.h>#include <stdlib.h>#include <winsock2.h>#include <string.h>#define BUF_SIZE 1024int main(int argc,char *argv[]){    WSADATA wsaData;    SOCKET hServerSock,hClntSock;    char message[BUF_SIZE];    int strlenth,i;    SOCKADDR_IN servAddr,clntAddr;    int clntAddrSize;    if(argc!=2)    {        printf("please input <port> :%s\n",argv[0]);        exit(0);    }    if(WSAStartup(MAKEWORD(2,2),&wsaData)!=0)        printf("WSAStartup() error");    hServerSock=socket(AF_INET,SOCK_STREAM,0);    if(hServerSock==INVALID_SOCKET)        printf("socket() error");    memset(&servAddr,0,sizeof(servAddr));    servAddr.sin_family=AF_INET;    servAddr.sin_addr.S_un.S_addr=htonl(INADDR_ANY);    servAddr.sin_port=htons(atoi(argv[1]));    if(bind(hServerSock,(SOCKADDR *)&servAddr,sizeof(servAddr))==SOCKET_ERROR)        printf("bind() error");    if(listen(hServerSock,5)==SOCKET_ERROR)        printf("listen() error!");    clntAddrSize=sizeof(clntAddr);    for(i=0;i<5;++i)    {        hClntSock=accept(hServerSock,(SOCKADDR*)&clntAddr,&clntAddrSize);        if(hClntSock==-1)            printf("accept() error");        else            printf("connected.....%d\n",i+1);        while((strlenth=recv(hClntSock,message,BUF_SIZE,0))!=0)            send(hClntSock,message,strlenth,0);        closesocket(hClntSock);    }    closesocket(hServerSock);    WSACleanup();    return 0;}

—————————————-客户端—————————————-
文件名称：Client.c
运行方式：命令行

#include <stdio.h>#include <stdlib.h>#include <winsock2.h>#include <string.h>#define BUF_SIZE 1024int main(int argc,int *argv[]){    WSADATA wsaData;    SOCKET clntSock;    char message[BUF_SIZE];    int strlenth;    SOCKADDR_IN servAddr;    if(argc!=3)    {        printf("please input <IP> <Port> %s\n",argv[0]);        exit(1);    }    if(WSAStartup(MAKEWORD(2,2),&wsaData)!=0)        printf("WSAStartup() error!");    clntSock=socket(AF_INET,SOCK_STREAM,0);    if(clntSock==INVALID_SOCKET)        printf("socket() error!");    memset(&servAddr,0,sizeof(servAddr));    servAddr.sin_family=AF_INET;    servAddr.sin_addr.S_un.S_addr=inet_addr(argv[1]);    servAddr.sin_port=htons(atoi(argv[2]));    if(connect(clntSock,(SOCKADDR *)&servAddr,sizeof(servAddr))==SOCKET_ERROR)        printf("connect error!");    else        printf("connected ....\n");    while(1)    {        printf("input message(Q to quit):\n");        gets(message);        if(!strcmp(message,"q")||!strcmp(message,"Q")||!strcmp(message,"\0"))            break;        send(clntSock,message,strlen(message),0);        strlenth=recv(clntSock,message,BUF_SIZE-1,0);        message[strlenth]=0;        printf("Message from server:%s\n",message);    }    closesocket(clntSock);    WSACleanup();    return 0;}

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