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<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="185.htm">上一层</a>][<a href="203.htm">下一篇</a>]
<hr><p align="left"><small>标题 Re: 我重新修改了一下,再试一下 [re: jcsun] <br>
作者 jkl (member) <br>
时间 11/13/00 03:37 PM <br>
<br>
#include "sys/types.h" <br>
#include "sys/socket.h" <br>
#include "netinet/in.h" <br>
#include "arpa/inet.h" <br>
#include "fcntl.h" <br>
#include "unistd.h" <br>
#include "stdarg.h" <br>
#include "stdio.h" <br>
#include "netdb.h" <br>
<br>
int verbose = 1; <br>
FILE *ftpio = NULL; <br>
char buf[4096]; <br>
<br>
int ftpcmd(int sockftp,char *fmt,...) <br>
{ <br>
va_list vp; <br>
int err,len; <br>
<br>
<br>
if (ftpio == NULL) { <br>
ftpio = fdopen(sockftp,"r"); <br>
if (ftpio == NULL) <br>
return -1; <br>
} <br>
<br>
if (fmt) { <br>
va_start(vp,fmt); <br>
len = vsprintf(buf,fmt,vp); <br>
buf[len++] = '\r'; <br>
buf[len++] = '\n'; <br>
write(sockftp,buf,len); <br>
if (verbose) <br>
write(1,buf,len); <br>
} <br>
<br>
do { <br>
if (fgets(buf,sizeof(buf),ftpio) == NULL) <br>
return -1; <br>
if (verbose) <br>
printf(buf); <br>
} while(buf[3] == '-'); <br>
<br>
sscanf(buf,"%d",&err); <br>
return err; <br>
} <br>
<br>
int ftp(char *host,char *user,char *pass,char *filename,char *savefile) <br>
{ <br>
int sockftp = -1,sockdata = -1,sockxfer = -1; <br>
struct sockaddr_in addr; <br>
unsigned long hostip; <br>
int len,tmp,err; <br>
int retval = -1; <br>
int savefd; <br>
unsigned char *c,*p; <br>
struct hostent *he; <br>
<br>
hostip = inet_addr(host); <br>
if (hostip == -1) { <br>
he = gethostbyname(host); <br>
if (he == NULL) <br>
return -1; <br>
hostip = * (unsigned long *)he->h_addr; <br>
} <br>
<br>
sockftp = socket(AF_INET,SOCK_STREAM,0); <br>
if (sockftp == -1) <br>
goto out; <br>
<br>
addr.sin_family = PF_INET; <br>
addr.sin_port = htons(21); <br>
addr.sin_addr.s_addr = hostip; <br>
if (connect(sockftp,(struct sockaddr *)&addr,sizeof(addr)) ==-1) <br>
goto out; <br>
<br>
err = ftpcmd(sockftp,NULL); <br>
if (err != 220) goto out; <br>
<br>
err = ftpcmd(sockftp,"USER %s",user); <br>
if (err != 331) goto out; <br>
<br>
err = ftpcmd(sockftp,"PASS %s",pass); <br>
if (err != 230) goto out; <br>
<br>
err = ftpcmd(sockftp,"TYPE I"); <br>
if (err != 200) goto out; <br>
<br>
sockdata = socket(AF_INET,SOCK_STREAM,0); <br>
if (sockdata == -1) goto out; <br>
tmp = sizeof(addr); <br>
getsockname(sockftp,(struct sockaddr *)&addr,&tmp); <br>
addr.sin_port = 0; <br>
<br>
if (bind(sockdata,(struct sockaddr *)&addr,sizeof(addr)) == -1) <br>
goto out; <br>
if (listen(sockdata,1) == -1) <br>
goto out; <br>
<br>
tmp = sizeof(addr); <br>
getsockname(sockdata,(struct sockaddr *)&addr,&tmp); <br>
c = (unsigned char *)&addr.sin_addr; <br>
p = (unsigned char *)&addr.sin_port; <br>
err = ftpcmd(sockftp,"PORT %d,%d,%d,%d,%d,%d",c[0],c[1],c[2],c[3],p[0],p <br>
[1]); <br>
if (err != 200) goto out; <br>
err = ftpcmd(sockftp,"RETR %s",filename); <br>
if (err != 150) goto out; <br>
<br>
tmp = sizeof(addr); <br>
sockxfer = accept(sockdata,(struct sockaddr *)&addr,&tmp); <br>
if (sockxfer == -1) goto out; <br>
savefd = open(savefile,O_WRONLY|O_CREAT,0644); <br>
if (savefd == -1) goto out; <br>
retval = 0; <br>
while ((len=read(sockxfer,buf,sizeof(buf)))>0) { <br>
write(savefd,buf,len); <br>
retval += len; <br>
}; <br>
close(savefd); <br>
out: <br>
close(sockxfer); <br>
close(sockdata); <br>
close(sockftp); <br>
if (ftpio) { <br>
fclose(ftpio); <br>
ftpio = NULL; <br>
} <br>
return retval; <br>
} <br>
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