网络编程

来源：互联网发布：手机bobble是什么软件编辑：程序博客网时间：2024/05/24 01:01

客户端代码如下

#include<stdio.h>#include<string.h>#include<stdlib.h>#include<unistd.h>#include<sys/stat.h>#include<arpa/inet.h>#include<sys/socket.h>int main(){    int ssock,len;    char buf[100];    char client[100]="this is from client";//用来发送给server    struct sockaddr_in server_addr;//结构体sockaddr_in包含里各种参数    if((ssock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))<0){        perror("socket error");//如果socket错误，会弹出该条信息        exit(1);    }    len=sizeof(server_addr);    memset(&server_addr,0,len);//相当于用len个0填充server_addr    server_addr.sin_family=AF_INET;//协议族    server_addr.sin_addr.s_addr=inet_addr("127.0.0.1");//地址    server_addr.sin_port=htons(7758);//端口    memset(buf,0,100);    if(connect(ssock,(struct sockaddr *)&server_addr,len)<0){        perror("connect error");        exit(1);    }//连接    int n;    if((n=read(ssock,buf,100))<=0){        perror("read error");        exit(1);    }//从ssock中读取100个字节到buf中    if(write(ssock,client,100)<=0){        perror("write error");        exit(1);    }//把client中的100个字节写入ssock    buf[n]='\0';//字符串末尾加个结束符号    close(ssock);//关闭    printf("read :%s\n",buf);//打印接收到的字符串return 0;}

服务器端代码如下

#include<stdio.h>#include<string.h>#include<stdlib.h>#include<sys/socket.h>#include<arpa/inet.h>#include<unistd.h>#include<sys/stat.h>int main(){    int clen;    int ssock,csock;    struct sockaddr_in client_addr,server_addr;    char buf[100]="this is from server";    char cli[100];    if((ssock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))<0){        perror("socket error");        exit(1);    }    clen=sizeof(client_addr);    memset(&server_addr,0,sizeof(server_addr));    server_addr.sin_family=AF_INET;    server_addr.sin_addr.s_addr=htonl(INADDR_ANY);    server_addr.sin_port=htons(7758);    if(bind(ssock,(struct sockaddr *)&server_addr,sizeof(server_addr))<0){        perror("bind error");        exit(1);    }    if(listen(ssock,8)<0){        perror("listen error");        exit(1);    }    while(1){        csock=accept(ssock,(struct sockaddr *)&client_addr,&clen);        if(write(csock,buf,100)<=0)            perror("write error");        if(read(csock,cli,100)<=0){            perror("read error");        }        else            printf("from client %s\n",cli);        close(csock);    }    return 0;}

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