并发服务器设计

来源：互联网发布：网络论坛生存现状编辑：程序博客网时间：2024/06/07 03:56

并发服务器就是能够同时处理多个客户端请求的服务器。并发服务器可通过多进程或者多线程程序来实现，这里采用多进程程序。

服务器

#include<stdio.h>#include<stdlib.h>#include<string.h>#include<unistd.h>#include<sys/types.h>#include<sys/socket.h>#include<netinet/in.h>/*定义了struct sockaddr_in*/void main(){    int sockfd;    /*创建socket*/    sockfd=socket(AF_INET,SOCK_STREAM,0);    if(sockfd==-1)    {        printf("create socket false");        exit(1);        }    /*绑定地址*/    struct sockaddr_in server_addr;    server_addr.sin_family=AF_INET;    server_addr.sin_port=htons(5000);    server_addr.sin_addr.s_addr=htonl(INADDR_ANY);    if(bind(sockfd,(const struct sockaddr *)(&server_addr),sizeof(server_addr))==-1)    {        printf("bind false");        exit(1);        }    /*监听端口*/    listen(sockfd,3);    /*父进程等待连接，成功连接后创建子进程收发数据*/    int newfd;    struct sockaddr_in client_addr;    int addrlen=sizeof(client_addr);    char buf[128];    pid_t pid;    while(1)    {        newfd=accept(sockfd,(struct sockaddr *)(&client_addr),&addrlen);        pid=fork();        if(pid==0)        {            while(1)            {                recv(newfd,buf,128,0);                printf("the message is from :%s\n",inet_ntoa(client_addr.sin_addr));                printf("the message received is %s\n",buf);                if(strcmp(buf,"exit")==0)                {                    break;                  }            }            close(newfd);            close(sockfd);            exit(0);        }    }    /*结束连接*/    close(newfd);    close(sockfd);}

客户端

#include<stdio.h>#include<stdlib.h>#include<string.h>#include<unistd.h>#include<sys/types.h>#include<sys/socket.h>#include<netinet/in.h>/*定义了struct sockaddr_in*/void main(){    /*创建socket*/    int sockfd=socket(AF_INET,SOCK_STREAM,0);    if(sockfd==-1)    {        printf("create socket false");        exit(1);        }    /*连接服务器*/    struct sockaddr_in server_addr;    server_addr.sin_family=AF_INET;    server_addr.sin_port=htons(5000);    server_addr.sin_addr.s_addr=inet_addr("192.168.137.246");    if(connect(sockfd,(const struct sockaddr *)(&server_addr),sizeof(server_addr))==-1)    {        printf("connect false");        exit(1);        }    /*收发数据*/    printf("please enter your message,and exit for exit\n");    char buf[128];    while(1)    {        scanf("%s",buf);        send(sockfd,buf,128,0);        if(strcmp(buf,"exit")==0)            break;    }    /*结束连接*/    close(sockfd);}

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