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// ftp.h
// Copyright (C) 1992-1996 Gnanasekaran Swaminathan <gs4t@virginia.edu>
//
// Permission is granted to use at your own risk and distribute this software
// in source and binary forms provided the above copyright notice and this
// paragraph are preserved on all copies. This software is provided "as is"
// with no express or implied warranty.
//
// Version: 12Jan97 1.11
#include <config.h>
#include <socket++/ftp.h>
#include <fstream>
#include <socket++/fork.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h> // for sprintf
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
using namespace std;
#if defined (__osf__) && defined (__DECCXX)
extern "C" {
# include <netdb.h>
}
#else
# include <netdb.h>
#endif
char reptype [][8] = {
"A N",
"A T",
"A C",
"E N",
"E T",
"E C",
"I",
"L "
};
char filestru [][8] = {
"F",
"R",
"P"
};
char transmode [][8] = {
"S",
"B",
"C"
};
// ftpdata waits on a port at the local machine.
// When a connection is made, it receives a file from remote
// host if the ostream o is set, or it sends a file to the remote
// host if the istream i is set.
ftp::replycodea ftp::ftpbuf::ftpdata (int portno, istream* i, ostream* o,
const char* cmd, const char* arg)
{
sockinetbuf sb (sockbuf::sock_stream, 0);
sb.bind_until_success (portno);
useraddr (sb.localaddr ());
sb.listen (1);
if (send_cmd (cmd, arg) >= ftp::rca_error)
return ftp::rca_error;
if (o) {
sockbuf c = sb.accept ();
// read data from c and put it in o
char buf [1024];
int rdsz;
while ((rdsz = c.sgetn (buf, 1024)) != EOF)
o->write (buf, rdsz);
} else if (i) {
sockbuf c = sb.accept ();
// read data from i and send it to c
char buf [1024];
int rdsz;
streambuf* rb = i->rdbuf ();
while ((rdsz = rb->sgetn (buf, 1024)) > 0) {
int wrsz = c.sputn (buf, rdsz);
if (rdsz != wrsz)
cerr << "write error\n";
}
}
// Note: sockbuf object c must have been destructed by the time you reach
// here.
return get_response ();
}
ftp::replycodea ftp::ftpbuf::get_response ()
// get all the response that one can get and send all of them to o
{
// if o is 0, then we trash data.
int firstline = 1;
while (underflow () != EOF) {
int n = in_avail ();
if (n < 5)
continue;
// data is of this form: 221 repsonse <CRLF> or 221-response <CRLF>
char* q = gptr ();
char* p = q;
// zap upto <CRLF>
int i = 0;
for (i = 2; i <= n; i++, p++)
if (*p == '\r' && *(p+1) == '\n') {
break;
}
if (o)
o->write (q, i);
gbump (i);
if (firstline) {
strncpy (replycode, q, 3);
replycode [3] = ' ';
if (q [3] == ' ')
break;
firstline = 0;
} else if (strncmp (q, replycode, 4) == 0)
break;
}
return (replycodea) replycode [0];
}
ftp::replycodea ftp::ftpbuf::send_cmd (const char* cmd,
const char* arg)
{
xsputn (cmd, ::strlen (cmd));
if (arg) {
xsputn (" ", 1);
xsputn (arg, ::strlen (arg));
}
xsputn ("\r\n", 2);
sync ();
return get_response ();
}
ftp::ftp (ostream* out)
: ios (0)
{
ios::init (new ftpbuf (out));
}
ftp::ftpbuf::ftpbuf (ostream* out)
: protocol::protocolbuf (protocol::tcp),
o (out)
{
replycode [4] = 0;
}
void ftp::ftpbuf::serve_clients (int portno)
// right now no server ftp class can be used as a server
{}
ftp::replycodea ftp::ftpbuf::cd (const char* dir)
{
return send_cmd ("CWD", dir);
}
ftp::replycodea ftp::ftpbuf::useraddr (sockinetaddr sa)
{
if (sa.sin_addr.s_addr == 0) {
// local host
char hostname [64];
if (::gethostname (hostname, 63) == -1) throw sockerr (EADDRNOTAVAIL);
hostent* hp = gethostbyname (hostname);
if (hp == 0) throw sockerr (EADDRNOTAVAIL);
memcpy (&sa.sin_addr, hp->h_addr, hp->h_length);
}
struct in_addr ina = sa.sin_addr;
int portno = ntohs(sa.sin_port);
char* ina_p = inet_ntoa (ina);
char addr [80];
char* p = 0;
strcpy (addr, ina_p);
while ((p = strchr (addr, '.')))
*p = ',';
int hi_portno = portno >> 8;
int lo_portno = portno & 0xff;
sprintf (addr + strlen (addr), ",%d,%d", hi_portno, lo_portno);
return send_cmd ("PORT", addr);
}
ftp::replycodea ftp::ftpbuf::useraddr (const char* hostname, int portno)
{
return useraddr (sockinetaddr (hostname, portno));
}
ftp::replycodea ftp::ftpbuf::server_port (int portno)
{
int hi_portno = portno >> 8;
int lo_portno = portno & 0xff;
char port [80];
sprintf (port, "%d,%d", hi_portno, lo_portno);
return send_cmd ("PASV", port);
}
ftp::replycodea ftp::ftpbuf::rep_type (ftp::reptype rt)
{
return send_cmd ("TYPE", ::reptype [int(rt)]);
}
ftp::replycodea ftp::ftpbuf::file_stru (ftp::filestru fs)
{
return send_cmd ("STRU", ::filestru [int(fs)]);
}
ftp::replycodea ftp::ftpbuf::trans_mode (ftp::transmode tm)
{
return send_cmd ("STRU", ::transmode [int(tm)]);
}
ftp::replycodea ftp::ftpbuf::getfile (const char* rpath, const char* lpath)
{
if (lpath == 0)
lpath = rpath;
if (rpath == 0)
list ();
ofstream f (lpath);
return ftpdata (10000, 0, &f, "RETR", rpath);
}
ftp::replycodea ftp::ftpbuf::list (const char* rpath, int justnames)
{
if (justnames)
return ftpdata (10000, 0, o, "NLST", rpath);
else
return ftpdata (10000, 0, o, "LIST", rpath);
}
ftp::replycodea ftp::ftpbuf::putfile (const char* lpath, const char* rpath)
{
if (rpath == 0)
rpath = lpath;
if (lpath == 0)
return ftp::rca_error;
ifstream f(lpath);
return ftpdata (10000, &f, 0, "STOR", rpath);
}
ftp::replycodea ftp::ftpbuf::putfile (const char* lpath)
{
if (lpath == 0)
return ftp::rca_error;
ifstream f(lpath);
return ftpdata (10000, &f, 0, "STOU", lpath);
}
ftp::replycodea ftp::ftpbuf::append (const char* lpath, const char* rpath)
{
if (lpath == 0)
return ftp::rca_error;
if (rpath == 0)
rpath = lpath;
ifstream f(lpath);
return ftpdata (10000, &f, 0, "APPE", 0);
}
ftp::replycodea ftp::ftpbuf::allocate (int numbytes)
{
char b[32];
sprintf (b, "%d", numbytes);
return send_cmd ("ALLO", b);
}
ftp::replycodea ftp::ftpbuf::restart (int marker)
{
char b[32];
sprintf (b, "%d", marker);
return send_cmd ("REST", b);
}
ftp::replycodea ftp::ftpbuf::rename (const char* rpath, const char* newrpath)
{
if (rpath == 0 || newrpath == 0)
return ftp::rca_error;
if (send_cmd ("RNFR", rpath) >= ftp::rca_error)
return rca_error;
return send_cmd ("RNTO", newrpath);
}
ftp::replycodea ftp::ftpbuf::rmfile (const char* rpath)
{
return send_cmd ("DELE", rpath);
}
ftp::replycodea ftp::ftpbuf::rmdir (const char* rpath)
{
return send_cmd ("RMD", rpath);
}
ftp::replycodea ftp::ftpbuf::mkdir (const char* rpath)
{
return send_cmd ("MKD", rpath);
}
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