嵌入式

嵌入式linux ftp下载程序

2019-07-12 22:26发布

站内文章 / 嵌入式Linux
9388 0 1016
ftp.h文件 #ifndef __FTP_H_
#define __FTP_H_ #include
#include
#include
#include
#include
#include
#include
#include
#include #include "common.h" int ftpcmd(int sockftp,char *fmt,...);
int ftp(char *host,char *port,char *user,char *pass,char *filename,char *savefile);
#endif   ftp.c文件 #include "ftp.h" int verbose = 1;
FILE *ftpio = NULL;
char buf[4096]; int main(int argc,char *argv[])
{  if (argc<6)
 {
  dprint("usgs:%s /n",argv[0]);
  exit(-1);
 }  ftp(argv[1],argv[2],argv[3],argv[4],argv[5],argv[6]);  return 1;
}
int ftp(char *host,char *port,char *user,char *pass,char *filename,char *savefile)
{       
 int sockftp = -1,sockdata = -1,sockxfer = -1;       
 struct sockaddr_in addr;       
 unsigned long hostip;       
 int len,tmp,err;       
 int retval = -1;       
 int savefd;       
 unsigned char *c,*p;       
 struct hostent *he;       
 hostip = inet_addr(host);       
 if (hostip == -1)
 {               
  he = gethostbyname(host);               
  if (he == NULL)                       
   return -1;              
  hostip = * (unsigned long *)he->h_addr;       
 }      
 sockftp = socket(AF_INET,SOCK_STREAM,0);       
 if (sockftp == -1)               
  goto out;       
 addr.sin_family = PF_INET;
 //addr.sin_port = htons(21);
 addr.sin_port = htons(atoi(port));       
 addr.sin_addr.s_addr = hostip;       
 if (connect(sockftp,(struct sockaddr *)&addr,sizeof(addr)) == -1)               
  goto out;               
 err = ftpcmd(sockftp,NULL);       
 if (err != 220)               
  goto out;       
 err = ftpcmd(sockftp,"USER %s",user);       
 if (err != 331)               
  goto out;       
 err = ftpcmd(sockftp,"PASS %s",pass);       
 if (err != 230)               
  goto out;       
 err = ftpcmd(sockftp,"TYPE I");       
 if (err != 200)               
  goto out;       
 sockdata = socket(AF_INET,SOCK_STREAM,0);       
 if (sockdata == -1)               
  goto out;       
 tmp = sizeof(addr);       
 getsockname(sockftp,(struct sockaddr *)&addr,&tmp);       
 addr.sin_port = 0;       
 if (bind(sockdata,(struct sockaddr *)&addr,sizeof(addr)) == -1)               
  goto out;      
 if (listen(sockdata,1) == -1)               
  goto out;      
 tmp = sizeof(addr);       
 getsockname(sockdata,(struct sockaddr *)&addr,&tmp);       
 c = (unsigned char *)&addr.sin_addr;       
 p = (unsigned char *)&addr.sin_port;       
 err = ftpcmd(sockftp,"PORT %d,%d,%d,%d,%d,%d",               
  c[0],c[1],c[2],c[3],p[0],p[1]);   if (err != 200)               
  goto out;       
 err = ftpcmd(sockftp,"RETR %s",filename);       
 if (err != 150)               
  goto out;       
 tmp = sizeof(addr);       
 sockxfer = accept(sockdata,(struct sockaddr *)&addr,&tmp);       
 if (sockxfer == -1)               
  goto out;      
 savefd = open(savefile,O_WRONLY|O_CREAT,0644);       
 if (savefd == -1)               
  goto out;       
 retval = 0;       
 while ((len=read(sockxfer,buf,sizeof(buf)))>0)
 {               
  write(savefd,buf,len);               
  retval += len;       
 };       
 close(savefd); out:       
 close(sockxfer);       
 close(sockdata);      
 close(sockftp);       
 if (ftpio)
 {               
  fclose(ftpio);               
  ftpio = NULL;       
 }       
 return retval;
} int ftpcmd(int sockftp,char *fmt,...)
{       
 va_list vp;       
 int err,len;       
 if (ftpio == NULL)
 {               
  ftpio = fdopen(sockftp,"r");               
  if (ftpio == NULL)                       
   return -1;       
 }       
 if (fmt)
 {               
  va_start(vp,fmt);               
  len = vsprintf(buf,fmt,vp);               
  buf[len++] = '/r';
  buf[len++]='/n';               
  write(sockftp,buf,len);               
  if (verbose)                       
   write(1,buf,len);       
 }
 dprint("command is %s/n",fmt);
 do
 {               
  if (fgets(buf,sizeof(buf),ftpio) == NULL)                       
   return -1;               
  if (verbose)                       
   dprint(buf);       
 } while(buf[3] == '-');       
 sscanf(buf,"%d",&err);       
 return err;
}

热门文章