linux TCP通信简单示例

最新推荐文章于 2023-06-29 22:30:41 发布

原创最新推荐文章于 2023-06-29 22:30:41 发布 · 972 阅读

0 ·

CC 4.0 BY-SA版权

linux应用开发专栏收录该内容

25 篇文章

订阅专栏

本文介绍了使用C语言实现的简单服务器与客户端通信程序。服务器通过socket编程接收客户端连接请求，并读取客户端发送的数据；客户端则负责连接服务器并发送信息。

主机端

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#define portnumber 3333
int main(int argc,char *argv[])
{
        int sockfd,new_fd;
        struct sockaddr_in sever_addr;
        struct sockaddr_in client_addr;
        int sin_size,nbytes;
        char buffer[1024];
        if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
        {
                fprintf(stderr,"socket error %s\n",strerror(errno));
                exit(1);
        }
        bzero(&sever_addr,sizeof(struct sockaddr_in));
        sever_addr.sin_family=AF_INET;
        sever_addr.sin_addr.s_addr=htonl(INADDR_ANY);
        sever_addr.sin_port=htons(portnumber);
        if(bind(sockfd,(struct sockaddr*)(&sever_addr),sizeof(struct sockaddr))==-1)
        {
                fprintf(stderr,"bind error %s\n",strerror(errno));
                exit(1);
        }
        if(listen(sockfd,5)==-1)
        {
                fprintf(stderr,"listen error %s\n",strerror(errno));
                exit(1);
        }
        while(1)
        {
                sin_size=sizeof(struct sockaddr_in);
                if((new_fd=accept(sockfd,(struct sockaddr*)(&client_addr),&sin_size))==-1)
                {
                        fprintf(stderr,"accept error %s\n",strerror(errno));
                        exit(1);
                }
                fprintf(stderr,"sever get connection from %s\n",inet_ntoa(client_addr.sin_addr));
                if((nbytes=read(new_fd,buffer,1024))==-1)
                {
                        fprintf(stderr,"read error %s\n",strerror(errno));
                        exit(1);
                }
                buffer[nbytes]='\0';
                printf("sever received %s\n",buffer);
                close(new_fd);
        }
}
客户端

exit(1);

        }
        printf("please input char:\n");
        fgets(buffer,1024,stdin);
        write(sockfd,buffer,strlen(buffer));
        close(sockfd);
        exit(0);
}