ftp服务器
客户端
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<errno.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<unistd.h>
#include<time.h>
#define BUFLEN 1024
char *SERVERIP="127.0.0.1";
int SERVER_PORT=23336;
int my_BUFSIZ=4096;
int FILE_NAME_MAX_SIZE=512;
void binner()
{
printf(" 【多进程版·ftpclient：Linux】 \n");
printf(" _ _ _ _ _ _ _ _ \n");
printf(" (_)(_)(_)(_) _ (_)_ _(_) (_)_ _(_)\n");
printf(" (_) (_) (_)_ _(_) (_)_ _(_) \n");
printf(" (_) _ _ _ (_) (_)_(_) (_)_(_) \n");
printf(" (_)(_)(_)(_) _(_)_ (_) \n");
printf(" (_) (_) _ _(_) (_)_ (_) \n");
printf(" (_) (_) _ _(_) (_)_ (_) \n");
printf(" (_) (_) (_) (_) (_) \n");
printf(" \n");
}
void menue()
{
printf("\n使用说明：\n");
printf("-h:帮助 \n");
printf("-l:服务器地址，默认127.0.0.1\n");
printf("-p:端口,默认23334 \n");
printf("-b:发送数据大小，默认4096\n");
printf("-f:文件最大，默认512\n");
}
int main(int argc,char **argv)
{
binner();
menue();
if(argc>1)
{
if(strcmp(argv[1],"-h")==0)
{
exit(-1);
}
else
{
for(int i=1;i<argc;++i)
{
if(strcmp(argv[i],"-p")==0)
{
SERVER_PORT=atoi(argv[i+1]);
}
else if(strcmp(argv[i],"-b")==0)
{
my_BUFSIZ=atoi(argv[i+1]);
}
else if(strcmp(argv[i],"-l")==0)
{
SERVERIP = argv[i+1];
}
else if(strcmp(argv[i],"-f")==0)
{
FILE_NAME_MAX_SIZE=atoi(argv[i+1]);
}
}
}
}
printf("【TCP客户端:目标IP %s,监听端口 %d，发送数据大小：%d，发送文件名最大：%d】\n\n",SERVERIP,SERVER_PORT,my_BUFSIZ,FILE_NAME_MAX_SIZE);
int tsock;
tsock=socket(AF_INET,SOCK_STREAM,0);
if(tsock<0)
{
printf("Create Socket Failed! \n");
exit(-1);
}
struct sockaddr_in servaddr;
memset(&servaddr,0,sizeof(servaddr));
servaddr.sin_family=AF_INET;
inet_aton(SERVERIP,&servaddr.sin_addr);
servaddr.sin_port=htons(SERVER_PORT);
int ret;
ret=connect(tsock,(struct sockaddr*)&servaddr,sizeof(struct sockaddr));
if(ret<0)
{
printf("Connect Failed!\n");
exit(-1);
}
char buf[BUFLEN];
memset(buf,'\0',sizeof(buf));
//接受服务器的文件名
if(recv(tsock,buf,sizeof(buf),0)>0)
{
printf("ftpclient>>\n");
printf("***************ftp_server当前目录文件***************\n");
puts(buf);//将结果显示在屏幕上
printf("*****************1.上传文件 2.下载文件*************\n");
}
else
{
puts("ftpclient>>\n接受文件失败!\n");
exit(-1);
}
memset(buf, '\0',sizeof(buf));
printf("ftpclient>>");
scanf("%s",buf);
//向服务器发送选择
if(send(tsock,buf,strlen(buf),0)<0)
{
puts("ftpclient>>发送数据失败!");
exit(-1);
}
if(strcmp(buf,"1")==0)
{
//上传文件
char file_name[FILE_NAME_MAX_SIZE+1];
memset(file_name,'\0',sizeof(file_name));
printf("ftpclient>>");
scanf("%s",file_name);
int len_file=strlen(file_name);
file_name[len_file+1]='\0';
if(send(tsock,file_name,len_file+1,0)<0)
{
puts("ftpclient>>发送文件名失败!");
exit(-1);
}
FILE * fp=fopen(file_name,"r");
printf("%s\n",file_name);
if(fp==NULL)
{
printf("ftpclient>>文件%s不存在\n",file_name);
}
else
{
char buffer[my_BUFSIZ];
memset(buffer,'\0',my_BUFSIZ);
int file_block_length=0;
while((file_block_length=fread(buffer,sizeof(char),my_BUFSIZ,fp))>0)
{
// printf("ftpserver>>文件块大小：%d\n",file_block_length);
if(send(tsock,buffer,file_block_length,0)<0)
{
printf("ftpclient>>文件%s发送失败\n",file_name);
break;
exit(-1);
}
memset(buffer,'\0',my_BUFSIZ);
}
fclose(fp);
printf("ftpclient>>文件%s发送成功\n",file_name);
}
}
else if(strcmp(buf,"2")==0)
{
//下载文件
char file_name[FILE_NAME_MAX_SIZE+1];
memset(file_name,'\0',sizeof(file_name));
printf("ftpclient>>");
scanf("%s",file_name);
//向服务器发送buffer中的数据，buffer中放的是文件的名字
if(send(tsock,file_name,strlen(file_name),0)<0)
{
printf("ftpclient>>发送数据失败!\n");
exit(-1);
}
//接受文件
FILE *fp = fopen(file_name,"w");
if(fp==NULL)
{
printf("ftpclient>>文件%s不可打开\n",file_name);
exit(-1);
}
char buffer[my_BUFSIZ];
memset(buffer,'\0',my_BUFSIZ);
int num;
while(num=recv(tsock,buffer,my_BUFSIZ,0))
{
// printf("ftpclient>>接收文件长度：%d\n",num);
if(num < 0)
{
printf("ftpclient>>接收数据失败!\n");
break;
}
int write_len = fwrite(buffer,sizeof(char),num,fp);
if(write_len!=num)
{
printf("ftpclient>>文件%s写入失败\n",file_name);
break;
}
memset(buffer,'\0',my_BUFSIZ);
}
// printf("ftpclient>>接收文件长度：%d\n",num);
printf("ftpclient>>接收文件%s成功\n",file_name);
fclose(fp);
}
//从服务器获取文件
close(tsock);
return 0;
}
服务器
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<errno.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<unistd.h>
#include<time.h>
#include<signal.h>
#include<stdlib.h>
#include <dirent.h>
#include <sys/stat.h>
#include <fcntl.h>
#define BUFLEN 1024
int SERVER_PORT = 23336 ;
int my_BUFSIZ=1024;
int FILE_NAME_MAX_SIZE=512;
int LISTEN=30;
int COMMOND_LEN=1024;
int PIDNUM=3;
void binner()
{
printf(" 【多进程版·ftpserver：Linux】 \n");
printf(" _ _ _ _ _ _ _ _ \n");
printf(" (_)(_)(_)(_) _ (_)_ _(_) (_)_ _(_)\n");
printf(" (_) (_) (_)_ _(_) (_)_ _(_) \n");
printf(" (_) _ _ _ (_) (_)_(_) (_)_(_) \n");
printf(" (_)(_)(_)(_) _(_)_ (_) \n");
printf(" (_) (_) _ _(_) (_)_ (_) \n");
printf(" (_) (_) _ _(_) (_)_ (_) \n");
printf(" (_) (_) (_) (_) (_) \n");
printf(" \n");
/*
服务器发送文件
*/
}
void menue()
{
printf("\n使用说明：\n");
printf("-h:帮助 \n");
printf("-p:端口,默认23334 \n");
printf("-b:发送数据大小，默认4096\n");
printf("-f:文件最大，默认512\n");
printf("-s:最大连接量，默认3\n");
}
#define maxn 10000000
int prime[maxn],x;
_Bool vis[maxn];
void oulasai(int n) //欧拉筛
{
memset(prime,0,sizeof(prime));
memset(vis,0,sizeof(vis));
for(int i=2;i<=n;i++)
{
if(!vis[i]) prime[x++]=i;
for(int j=0;j<x;j++)
{
if(i*prime[j]>n) break;
vis[i*prime[j]]=1;
if(i%prime[j]==0) break;
}
}
}
void send_prime_in_range(char *buf,int ssock)
{
//求出质数
memset(buf,'\0',sizeof(buf));
printf("ftpserver>>客户端要求的范围0-%s：\n",buf);
int num = atoi(buf);
x=0;
int index=0;
char res[my_BUFSIZ];
oulasai(num);
memset(buf,'\0',sizeof(buf));
for(int i=0;i<x;i++)
{
sprintf(res,"%d",prime[i]);
for(int j=0;j<strlen(res);++j)
{
buf[index++]=res[j];
}
buf[index++]=',';
}
printf("ftpserver>>发送的字符串：%s\n",buf);
send(ssock,buf,strlen(buf),0);
}
void commend_exec(int ssock,char *cmd)
{
DIR *dp=opendir(".");
struct dirent *entry;
char commd[COMMOND_LEN];
memset(commd,'\0',sizeof(commd));
while((entry = readdir(dp))!=NULL)
{
strcat(commd,entry->d_name);
strcat(commd," ");
}
send(ssock,commd,strlen(commd),0);
}
static void handle_fork (int msock)
{
if(listen(msock,LISTEN)<0)
{
printf("ftpserver>>监听失败!\n");
exit(-1);
}
char buf [BUFLEN] ;
time_t now;
int ssock;
struct sockaddr_in clientaddr;
socklen_t len=sizeof(struct sockaddr_in);
memset(&clientaddr,0,len);
ssock=accept(msock,(struct sockaddr*)&clientaddr,&len);
if(ssock<0)
{
printf("ftpserver>>Accept Failed!");
exit(-1);
}
printf("\n*****************通信开始****************\n");
printf("ftpserver>>正在通信的客户端是：%s: %d\n",inet_ntoa(clientaddr.sin_addr),ntohs(clientaddr.sin_port));
//ftp_server(ssock);
commend_exec(ssock,".");
char commd[COMMOND_LEN];
memset(commd,'\0',sizeof(commd));
if(recv(ssock,commd,sizeof(commd),0)<0)
{
printf("ftpserver>>接受客户端选择失败!\n");
exit(-1);
}
printf("ftpserver>>客户端的选择：%s\n",commd);
if(strcmp(commd,"1")==0)
{
//下载文件
char file_name[FILE_NAME_MAX_SIZE+1];
memset(file_name,'\0',strlen(file_name));
if(recv(ssock,file_name,FILE_NAME_MAX_SIZE,0)<0)
{
printf("ftpserver>>接受文件名失败!\n");
exit(-1);
}
//接受文件体
FILE *fp = fopen(file_name,"w");
//printf("%s",file_name)
if(fp==NULL)
{
printf("ftpserver>>文件\"%s\"不可打开\n",file_name);
exit(-1);
}
char buffer[my_BUFSIZ];
memset(buffer,'\0',my_BUFSIZ);
int num;
while(num=recv(ssock,buffer,my_BUFSIZ,0))
{
// printf("ftpclient>>接收文件长度：%d\n",num);
if(num < 0)
{
printf("ftpserver>>接收数据失败!\n");
break;
}
int write_len = fwrite(buffer,sizeof(char),num,fp);
if(write_len!=num)
{
printf("ftpserver>>文件%s写入失败\n",file_name);
break;
}
memset(buffer,'\0',my_BUFSIZ);
}
// printf("ftpclient>>接收文件长度：%d\n",num);
printf("ftpclient>>接收文件%s成功\n",file_name);
fclose(fp);
}
else if(strcmp(commd,"2")==0)
{
//接受文件
char buffer[my_BUFSIZ];
memset(buffer,'\0',sizeof(buffer));
if(recv(ssock, buffer, sizeof(buffer), 0)<0)
{
printf("ftpserver>>接收文件名失败\n");
exit(-1);
}
else
{
printf("ftpserver>>请求文件名%s\n",buffer);
}
char file_name[FILE_NAME_MAX_SIZE+1];
memset(file_name,'\0',sizeof(file_name));
//将文件名从缓冲区buffer拷贝到文件名数组里面
strncpy(file_name,buffer,strlen(buffer)>FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE:strlen(buffer));
FILE * fp=fopen(file_name,"r");
if(fp==NULL)
{
printf("ftpserver>>文件%s不存在\n",file_name);
}
else
{
memset(buffer,'\0',my_BUFSIZ);
int file_block_length=0;
while((file_block_length=fread(buffer,sizeof(char),my_BUFSIZ,fp))>0)
{
//printf("ftpserver>>文件块大小：%d\n",file_block_length);
if(send(ssock,buffer,file_block_length,0)<0)
{
printf("ftpserver>>文件:%s 发送失败\n",file_name);
break;
}
memset(buffer,'\0',my_BUFSIZ);
}
fclose(fp);
printf("ftpserver>>文件%s发送成功\n",file_name);
}
}
close(ssock);
close(msock);
return;
}
int main(int argc,char**argv)
{
binner();
menue();
if(argc>1)
{
if(strcmp(argv[1],"-h")==0)
{
binner();
menue();
exit(-1);
}
else
{
for(int i=1;i<argc;++i)
{
if(strcmp(argv[i],"-p")==0)
{
SERVER_PORT=atoi(argv[i+1]);
}
else if(strcmp(argv[i],"-b")==0)
{
my_BUFSIZ=atoi(argv[i+1]);
}
else if(strcmp(argv[i],"-f")==0)
{
FILE_NAME_MAX_SIZE=atoi(argv[i+1]);
}
else if(strcmp(argv[i],"-s")==0)
{
PIDNUM=atoi(argv[i+1]);
}
}
}
}
printf("【TCP服务端:监听端口 %d，发送数据大小：%d，发送文件最大：%d，最大连接数：%d】\n\n",SERVER_PORT,my_BUFSIZ,FILE_NAME_MAX_SIZE,PIDNUM);
int msock;
pid_t pid[PIDNUM];
msock=socket(AF_INET,SOCK_STREAM,0);
if(msock<0)
{
printf("Create Socket Failed!\n");
exit(-1);
}
struct sockaddr_in servaddr;
memset(&servaddr,0,sizeof(servaddr));
servaddr.sin_family=AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(SERVER_PORT);
int ret;
ret=bind(msock,(struct sockaddr*)&servaddr,sizeof(struct sockaddr_in));
if(ret<0)
{
printf("Server Bind Port: %d Failed!\n",SERVER_PORT);
exit(-1);
}
ret=listen(msock,LISTEN);
if(ret<0)
{
printf("Listen Failed!\n");
exit(-1);
}
signal(SIGCLD,SIG_IGN);
int i=0;
for (i=0;i<PIDNUM;i++)
{
pid[i]=fork();
if(pid[i]==0)
handle_fork(msock);
}
close(msock);
return 0;
}
运行效果
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