tftp--实现服务器与客户端的下载与上传

项目功能：实现服务器与客户端的下载与上传，及linux系统下的tftp功能

项目名称：tftp--实现服务器与客户端的下载与上传

开发环境：linux /C

开发工具：GCC/GDB

网络协议：TCP/IP

补充说明：程序中默认server端有upload文件夹用以接收client端上传的数据，client端有download文件夹用以下载server端的文件

开发流程：

编译流程：

1.cc server.c -o server

2.cc client.c -o client

运行l流程：

1. ./server 192.168.1.207(server ip) 8888(port)

2. ./client 192.168.1.207 8888

调试效果：

client 端

server 端

1.server.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include<signal.h>
#include<errno.h>#include <dirent.h>typedef struct { char cmd[10];int size;char buf[1024];
}MSG;
MSG msg;
enum{list,get,put};
int     do_list(int connect_fd)
{char buf[1024];int n;int fd;DIR *pdir;struct dirent *pdirent;if((pdir = opendir(".")) == NULL){perror("Fail to open directory ");exit(EXIT_FAILURE);}while((pdirent = readdir(pdir)) != NULL){if(pdirent->d_name[0] == '.' )continue;strcpy(msg.buf,pdirent->d_name);msg.size = strlen(msg.buf);msg.size = send(connect_fd,&msg,sizeof(MSG),0);}msg.size = 0;send(connect_fd,&msg,sizeof(MSG),0);puts("send list successfully");   return 0;
}int do_get(int connect_fd)
{char filename[10];int n;int fd;struct stat fileinfo;if(recv(connect_fd,&msg,sizeof(MSG),0) < 0){perror("fail to recv");exit(EXIT_FAILURE);    }if(stat(msg.buf,&fileinfo) < 0){perror("fail to stat");msg.size = -1;strcpy(msg.buf,strerror(errno));send(connect_fd,&msg,sizeof(MSG),0);return -1;}msg.size = fileinfo.st_size;strcpy(filename,msg.buf);puts("***********************");printf("send file size : %d\n",msg.size);printf("send filename : %s\n",msg.buf);puts("***********************");if(send(connect_fd,&msg,sizeof(MSG),0) < 0){perror("fail to recv");exit(EXIT_FAILURE);    }if((fd = open(msg.buf,O_RDONLY)) < 0){fprintf(stderr,"Fail to open %s, %s\n",msg.buf,strerror(errno));exit(EXIT_FAILURE);}while(1){msg.size = read(fd, msg.buf,sizeof(msg.buf));send(connect_fd,&msg,sizeof(MSG),0);if(msg.size == 0)break;}printf("send file %s successfully\n",filename);return 0;
}
int do_put(int connect_fd)
{char buf[1024];int n;int fd;if(recv(connect_fd,&msg,sizeof(msg),0) <= 0){perror("fail to recv");exit(EXIT_FAILURE);}puts("**********************************");printf("upload filename  : %s\n",msg.buf);printf("size:   %d\n",msg.size);puts("**********************************");strcpy(buf,"./upload/");strcat(buf,msg.buf);if((fd = open(buf,O_WRONLY | O_CREAT | O_TRUNC,0666)) < 0){perror("Fail to accept");exit(EXIT_FAILURE);}ftruncate(fd,msg.size);while(1){recv(connect_fd,&msg,sizeof(MSG),0);write(fd,msg.buf,msg.size);if(msg.size == 0)break;}printf("send file successfully!\n");exit(EXIT_SUCCESS);}
int  getcmd(char *pcmd)
{if(strcmp(pcmd,"list") == 0)return 0;if(strcmp(pcmd,"get") == 0)return 1;if(strcmp(pcmd,"put") == 0)return 2;
}
void    do_task(int connect_fd,char *cmd)
{MSG msg;switch(getcmd(cmd)){case put:printf("recv file  from client...\n");do_put(connect_fd);break;case get:printf("send file to  client...\n");do_get(connect_fd);break;case list:printf("send file list to client...\n");do_list(connect_fd);break;default :break;}return;
}
int do_client(int connect_fd)
{MSG msg;int n;while(1){if((n =recv(connect_fd,&msg,sizeof(msg),0) )< 0){perror("fail to recv");exit(EXIT_FAILURE);}if(n == 0)break;do_task(connect_fd,msg.cmd);}exit(EXIT_FAILURE);
}
void signal_handler(int signum)
{waitpid(-1,NULL,WNOHANG);return;
}
int main(int argc, const char *argv[])
{pid_t pid;int listen_fd;int connect_fd;socklen_t addrlen;struct sockaddr_in peer_addr;struct sockaddr_in server_addr;if(argc < 0){perror("fail to argc");exit(EXIT_FAILURE);}if(signal(SIGCHLD,signal_handler) == SIG_ERR){perror("fail to signal");exit(EXIT_FAILURE);}if((listen_fd = socket(AF_INET,SOCK_STREAM,0) )< 0){perror("fail to socket");exit(EXIT_FAILURE);}memset(&server_addr,0,sizeof(server_addr));server_addr.sin_family = AF_INET;server_addr.sin_port = htons(atoi(argv[2]));server_addr.sin_addr.s_addr =inet_addr(argv[1]);if(bind(listen_fd,(struct sockaddr *)&server_addr,sizeof(server_addr)) < 0) //描述本机端口和IP，要知道数据包发往哪个进程{perror("Fail to bind");exit(EXIT_FAILURE);}if(listen(listen_fd,8 ) < 0)//监听连接的套接字，接收各客户端的请求，返回监听套接字文件描述符{perror("Fail to listen");exit(EXIT_FAILURE);}puts("listening ...");addrlen = sizeof(peer_addr);  while(1){if((connect_fd = accept(listen_fd,(struct sockaddr *)&peer_addr,&addrlen)) < 0){perror("Fail to accept");//提取客户发过来的请求，返回新的已连接的套接字文件描述符exit(EXIT_FAILURE);}puts("*************************");printf("IP : %s\n",inet_ntoa(peer_addr.sin_addr));printf("PORT : %d\n",ntohs(peer_addr.sin_port));puts("*************************");if((pid = fork()) < 0)  {perror("Fail to listen");exit(EXIT_FAILURE);}if(pid == 0){do_client(connect_fd);}close(connect_fd);}exit(EXIT_FAILURE);
}

2.client.c

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include<errno.h>typedef struct {char cmd[10];int size;char buf[1024];
}MSG;enum{list,get,put};
int do_list(client_fd,pname)
{MSG msg;int fd;while(1){recv(client_fd,&msg,sizeof(MSG),0);if(msg.size == 0)break;printf("%s\n",msg.buf);}puts("get list successfully"); return 0;
}int    do_get(int client_fd,char *filename)
{MSG msg;int fd;char buf[1024];strcpy(msg.buf,filename);if(send (client_fd,&msg,sizeof(MSG),0) < 0){perror("Fail to send");exit(EXIT_FAILURE);}recv(client_fd,&msg,sizeof(MSG),0);if(msg.size < 0)  {printf("Error :%s  \n",msg.buf);return -1;}puts("***********************");printf(" download file size : %d\n",msg.size);printf(" download filename : %s\n",msg.buf);puts("***********************");strcpy(buf,"./download/");strcat(buf,msg.buf);if((fd = open(buf,O_WRONLY | O_CREAT | O_TRUNC,0666)) < 0){fprintf(stderr,"Fail to open %s,%s\n",buf,strerror(errno));exit(EXIT_FAILURE);}ftruncate(fd, msg.size);while(1){recv(client_fd,&msg,sizeof(MSG),0);if(msg.size == 0)break;write(fd,msg.buf,msg.size);} printf("download file %s successfully\n",filename);return 0;
}
int do_put(int client_fd,char *filename)
{MSG msg;int fd;int n;if((fd = open(filename,O_RDONLY)) < 0){perror("Fail to open");exit(EXIT_FAILURE);}msg.size  = lseek(fd,0,SEEK_END);strcpy(msg.buf,filename);lseek(fd,0,SEEK_SET);puts("**********************************");printf("filename : %s\n",msg.buf);printf("size :%d\n",msg.size);puts("**********************************");if(send(client_fd,&msg,sizeof(MSG),0) < 0){perror("Fail to send");exit(EXIT_FAILURE);}while(1){msg.size = read(fd,msg.buf,sizeof(msg.buf));if(send(client_fd,&msg,sizeof(MSG),0) < 0){perror("Fail to read");exit(EXIT_FAILURE);}    if(msg.size == 0)break;}printf("upload file successfully!\n");return 0;
}
int  getcmd(char *pcmd)
{if(strcmp(pcmd,"list") == 0)return 0;if(strcmp(pcmd,"get") == 0)return 1;if(strcmp(pcmd,"put") == 0)return 2;
}
int do_task(char *pcmd,char *pname,int client_fd)
{MSG msg;char buf[1024];int fd;switch(getcmd(pcmd)){case list:printf("get file list from the server ...\n");strcpy(msg.cmd,pcmd);if(send(client_fd,&msg,sizeof(MSG),0) < 0){perror("FAIL to send");exit(EXIT_FAILURE);}do_list(client_fd,pname);break;case get:printf("file  %s is downloading from server ...\n",pname);strcpy(msg.cmd , pcmd);if(send(client_fd,&msg,sizeof(MSG),0) < 0){perror("FAIL to send");exit(EXIT_FAILURE);}do_get(client_fd,pname);break;case put:printf(" file  %s is uploading to server ...\n",pname);strcpy(msg.cmd,pcmd);if(send(client_fd,&msg,sizeof(MSG),0) < 0){perror("Fail to send!");exit(EXIT_FAILURE);}do_put(client_fd,pname);break;default:break;}return 0;}
int main(int argc, const char *argv[])
{MSG msg;char buf[1024];char *pname,*pcmd;int client_fd;pid_t  pid;int connect_fd;socklen_t addrlen;struct sockaddr_in server_addr;if((client_fd = socket(AF_INET,SOCK_STREAM,0) )< 0){perror("fail to socket");exit(EXIT_FAILURE);}memset(&server_addr,0,sizeof(server_addr));server_addr.sin_family = AF_INET;server_addr.sin_addr.s_addr =inet_addr(argv[1]);server_addr.sin_port = htons(atoi(argv[2]));if(connect(client_fd,(struct sockaddr *)&server_addr,sizeof(server_addr)) < 0)  {perror("Fail to accept");exit(EXIT_FAILURE);}while(1){printf("tftp>");fgets(buf,sizeof(buf),stdin);buf[strlen(buf) -1] = '\0';if(strncmp(buf,"quit",4) == 0)break;pcmd = strtok(buf," ");pname = strtok(NULL," ");do_task(pcmd,pname,client_fd);}exit(EXIT_FAILURE);return 0;
}

tftp--实现服务器与客户端的下载与上传相关推荐

java上传音频到服务器_Java 客户端向服务端上传mp3文件数据的实例代码
客户端: package cn.itcast.uploadpicture.demo; import java.io.BufferedInputStream; import java.io.FileIn ...
【TFTP客户端--实现下载文件和上传文件】
TFTP客户端--实现下载文件和上传文件 TFTP协议文件下载文件上传 main TFTP协议 TFTP是一个传输文件的简单协议,它其于UDP协议而实现,但是我们也不能确定有些TFTP协议是基于其 ...
HTML转Canvas工具前端生成图片工具屏幕快照 html2canvas 下载或上传至服务器使用方法
HTML转Canvas工具前端生成图片工具屏幕快照 html2canvas 下载或上传至服务器使用方法 <!-- <img :src=& ...
MobaXterm连接远程服务器，使用Linux命令行上传下载文件
文章目录一.MobaXterm连接远程服务器二.Linux命令行上传和下载文件三.服务器挂载U盘传输文件四..ipynb文件转化为.py文件五.关闭本地电脑,服务器运行python 项目问 ...
servlet文件上传下载_Servlet上传文件和下载文件示例
servlet文件上传下载 Java Web应用程序中的文件上载和下载以及常见任务. 由于最近我写了很多有关Java servlet的文章 ,因此我想提供一个使用servlet上传和下载文件的示例示例 ...
怎么把手机文件导入华为云服务器,华为手机怎么把软件上传到云服务器
华为手机怎么把软件上传到云服务器内容精选换一换安装传输工具在本地主机和Windows云服务器上分别安装数据传输工具,将文件上传到云服务器.例如QQ.exe.在本地主机和Windows云服务器上分 ...
Java字节流与字符流，断点续传实现分片下载、上传、合并
文章目录一:字节流和字符流详解 1.1 流的概念 1.2 流的分类 1.3 字节流,字符流区别与使用场景 1.3.1 区别 1.3.2 使用场景 1.3.3 顶级父类 1.3.4 对比--总结对比字 ...
文件已上传服务器去哪找,ftp文件服务器上传后的文件在哪
ftp文件服务器上传后的文件在哪内容精选换一换 FTP/SFTP连接适用于从线下文件服务器或ECS服务器上迁移文件到OBS或数据库.当前仅支持Linux操作系统的FTP 服务器.连接FTP或SFT ...
下载批量上传试题的模板
来源于老师讲课的项目中 /// /// 1.1下载批量上传试题的模板 /// /// public ActionResult DownloadTemplet() { string path = Ser ...

tftp--实现服务器与客户端的下载与上传

tftp--实现服务器与客户端的下载与上传相关推荐

最新文章

热门文章