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ftpclass.cc
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/*
* lftp - file transfer program
*
* Copyright (c) 1996-2020 by Alexander V. Lukyanov (lav@yars.free.net)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include "ftpclass.h"
#include "xstring.h"
#include "url.h"
#include "FtpListInfo.h"
#include "FileGlob.h"
#include "FtpDirList.h"
#include "log.h"
#include "FileCopyFtp.h"
#include "LsCache.h"
#include "buffer_ssl.h"
#include "buffer_zlib.h"
#include "ascii_ctype.h"
#include "misc.h"
#define TELNET_IAC '\377' //255 /* interpret as command: */
#define TELNET_IP '\364' //244 /* interrupt process--permanently */
#define TELNET_DM '\362' //242 /* for telfunc calls */
#define TELNET_WILL '\373' //251
#define TELNET_WONT '\374' //252
#define TELNET_DO '\375' //253
#define TELNET_DONT '\376' //254
#include <errno.h>
#include <time.h>
#ifdef TM_IN_SYS_TIME
# include <sys/time.h>
#endif
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
CDECL_BEGIN
#include "regex.h"
CDECL_END
#if USE_SSL
# include "lftp_ssl.h"
#else
# define control_ssl 0
const bool Ftp::ftps=false;
#endif
#define FTP_DEFAULT_PORT "21"
#define FTPS_DEFAULT_PORT "990"
#define FTP_DATA_PORT 20
#define FTPS_DATA_PORT 989
#define HTTP_DEFAULT_PROXY_PORT "3128"
#define super NetAccess
#define is5XX(code) ((code)>=500 && (code)<600)
#define is4XX(code) ((code)>=400 && (code)<500)
#define is3XX(code) ((code)>=300 && (code)<400)
#define is2XX(code) ((code)>=200 && (code)<300)
#define is1XX(code) ((code)>=100 && (code)<200)
#define cmd_unsupported(code) ((code)==500 || (code)==502)
#define site_cmd_unsupported(code) (cmd_unsupported((code)) || (code)==501)
#ifndef EINPROGRESS
#define EINPROGRESS -1
#endif
FileAccess *Ftp::New() { return new Ftp(); }
void Ftp::ClassInit()
{
// register the class
Register("ftp",Ftp::New);
FileCopy::fxp_create=FileCopyFtp::New;
#if USE_SSL
Register("ftps",FtpS::New);
#endif
}
#if INET6
struct eprt_proto_match
{
int proto;
int eprt_proto;
};
static const eprt_proto_match eprt_proto[]=
{
{ AF_INET, 1 },
{ AF_INET6, 2 },
{ -1, -1 }
};
const char *Ftp::encode_eprt(const sockaddr_u *a)
{
int proto;
if(a->sa.sa_family==AF_INET)
proto=1;
else if(a->sa.sa_family==AF_INET6)
proto=2;
else
return 0;
return xstring::format("|%d|%s|%d|",proto,a->address(),a->port());
}
#endif
bool Ftp::Connection::data_address_ok(const sockaddr_u *dp,bool verify_address,bool verify_port)
{
sockaddr_u d;
sockaddr_u c;
socklen_t len;
len=sizeof(d);
if(dp)
d=*dp;
else if(getpeername(data_sock,&d.sa,&len)==-1)
{
LogError(0,"getpeername(data_sock): %s\n",strerror(errno));
return !verify_address && !verify_port;
}
len=sizeof(c);
if(getpeername(control_sock,&c.sa,&len)==-1)
{
LogError(0,"getpeername(control_sock): %s\n",strerror(errno));
return !verify_address;
}
#if INET6
if(d.sa.sa_family==AF_INET && c.sa.sa_family==AF_INET6
&& IN6_IS_ADDR_V4MAPPED(&c.in6.sin6_addr))
{
if(memcmp(&d.in.sin_addr,&c.in6.sin6_addr.s6_addr[12],4))
goto address_mismatch;
if(d.in.sin_port!=htons(FTP_DATA_PORT)
&& d.in.sin_port!=htons(FTPS_DATA_PORT))
goto wrong_port;
}
#endif
if(d.sa.sa_family==AF_INET)
{
if(memcmp(&d.in.sin_addr,&c.in.sin_addr,sizeof(d.in.sin_addr)))
goto address_mismatch;
if(d.in.sin_port!=htons(FTP_DATA_PORT)
&& d.in.sin_port!=htons(FTPS_DATA_PORT))
goto wrong_port;
return true;
}
#if INET6
# ifndef IN6_ARE_ADDR_EQUAL
# define IN6_ARE_ADDR_EQUAL(a,b) (!memcmp((a),(b),16))
# endif
if(d.sa.sa_family==AF_INET6)
{
if(!IN6_ARE_ADDR_EQUAL(&d.in6.sin6_addr,&c.in6.sin6_addr))
goto address_mismatch;
if(d.in6.sin6_port!=htons(FTP_DATA_PORT)
&& d.in6.sin6_port!=htons(FTPS_DATA_PORT))
goto wrong_port;
return true;
}
#endif
return true;
wrong_port:
if(!verify_port)
return true;
LogError(0,_("Data connection peer has wrong port number"));
return false;
address_mismatch:
if(!verify_address)
return true;
LogError(0,_("Data connection peer has mismatching address"));
return false;
}
/* Procedures for checking for a special answers */
/* General rule: check for valid replies first, errors second. */
void Ftp::RestCheck(int act)
{
if(is2XX(act) || is3XX(act))
{
real_pos=conn->rest_pos; // REST successful
conn->last_rest=conn->rest_pos;
return;
}
real_pos=0;
if(pos==0)
return;
if(is5XX(act))
{
if(cmd_unsupported(act))
conn->rest_supported=false;
LogNote(2,_("Switching to NOREST mode"));
flags|=NOREST_MODE;
if(mode==STORE)
pos=0;
if(copy_mode!=COPY_NONE)
copy_failed=true;
return;
}
Disconnect(line);
}
void Ftp::NoFileCheck(int act)
{
if(is2XX(act))
return;
if(cmd_unsupported(act))
{
SetError(FATAL,all_lines);
return;
}
if(real_pos>0 && !GetFlag(IO_FLAG) && copy_mode==COPY_NONE
&& ((is4XX(act) && strstr(line,"Append/Restart not permitted"))
|| (is5XX(act) && !Transient5XX(act))))
{
DataClose();
LogNote(2,_("Switching to NOREST mode"));
flags|=NOREST_MODE;
real_pos=0;
if(mode==STORE)
pos=0;
state=EOF_STATE; // retry
return;
}
if(is5XX(act) && !Transient5XX(act))
{
SetError(NO_FILE,all_lines);
return;
}
if(copy_mode!=COPY_NONE)
{
copy_failed=true;
return;
}
DataClose();
state=EOF_STATE;
eof=false;
if(mode==STORE && GetFlag(IO_FLAG))
SetError(STORE_FAILED,0);
else if(NextTry())
retry_timer.Set(2); // retry after 2 seconds
}
/* 5xx that aren't errors at all */
bool Ftp::NonError5XX(int act) const
{
return (mode==LIST && act==550 && (!file || !file[0]))
// ...and proftpd workaround.
|| (mode==LIST && act==450 && strstr(line,"No files found"));
}
bool Ftp::ServerSaid(const char *s) const
{
return strstr(line,s) && (!file || !strstr(file,s));
}
/* 5xx that are really transient like 4xx */
bool Ftp::Transient5XX(int act) const
{
if(!is5XX(act))
return false;
if(act==530 && expect->FirstIs(Expect::PASS) && Retry530())
return true;
// retry on these errors (ftp server ought to send 4xx code instead)
if(ServerSaid("Broken pipe") || ServerSaid("Too many")
|| ServerSaid("timed out") || ServerSaid("closed by the remote host"))
return true;
// if there were some data received, assume it is temporary error.
if(mode!=STORE && GetFlag(IO_FLAG))
return true;
return false;
}
#if USE_SSL
const char *Ftp::get_protect_res()
{
if(mode==LIST || mode==MP_LIST || (mode==LONG_LIST && !use_stat_for_list))
return "ftp:ssl-protect-list";
else if(mode==RETRIEVE || mode==STORE)
return "ftp:ssl-protect-data";
return 0;
}
#endif
// 226 Transfer complete.
void Ftp::TransferCheck(int act)
{
if(act==225 || act==226) // data connection is still open or ABOR worked.
{
copy_done=true;
conn->CloseAbortedDataConnection();
if(!conn->received_150 && state!=DATA_OPEN_STATE)
goto simulate_eof;
}
if(act==211)
{
// permature STAT?
conn->stat_timer.ResetDelayed(3);
return;
}
if(act==213) // this must be a STAT reply.
{
conn->stat_timer.Reset();
long long p;
// first try Serv-U format:
// Status for user UUU from X.X.X.X
// Stored 1 files, 0 Kbytes
// Retrieved 0 files, 0 Kbytes
// Receiving file XXX (YYY bytes)
const char *r=strstr(all_lines,"Receiving file");
if(r)
{
r=strrchr(r,'(');
char c=0;
if(r && sscanf(r,"(%lld bytes%c",&p,&c)==2 && c==')')
goto found_offset;
}
// wu-ftpd format:
// Status: XXX of YYY bytes transferred
// or
// Status: XXX bytes transferred
//
// find the first number.
for(const char *b=line+4; ; b++)
{
if(*b==0)
return;
if(!is_ascii_digit(*b))
continue;
if(sscanf(b,"%lld",&p)==1)
break;
}
found_offset:
if(copy_mode==COPY_DEST)
real_pos=pos=p;
return;
}
if(copy_mode!=COPY_NONE && is4XX(act))
{
copy_passive=!copy_passive;
copy_failed=true;
return;
}
if(NonError5XX(act))
goto simulate_eof;
if(act==426 && copy_mode==COPY_NONE)
{
if(conn->data_sock==-1 && strstr(line,"Broken pipe"))
return;
}
if(act==426 && mode==STORE)
{
DataClose();
state=EOF_STATE;
SetError(FATAL,all_lines);
}
if(is2XX(act) && conn->data_sock==-1)
eof=true;
#if USE_SSL
if(conn->auth_supported && act==522 && conn->prot=='C') {
const char *res=get_protect_res();
if(res) {
// try again with PROT P
DataClose();
ResMgr::Set(res,hostname,"yes");
state=EOF_STATE;
return;
}
}
#endif
NoFileCheck(act);
return;
simulate_eof:
DataClose();
state=EOF_STATE;
eof=true;
return;
}
bool Ftp::Retry530() const
{
const char *rexp=Query("retry-530",hostname);
if(re_match(all_lines,rexp,REG_ICASE))
{
LogNote(9,_("Server reply matched ftp:retry-530, retrying"));
return true;
}
if(!user)
{
rexp=Query("retry-530-anonymous",hostname);
if(re_match(all_lines,rexp,REG_ICASE))
{
LogNote(9,_("Server reply matched ftp:retry-530-anonymous, retrying"));
return true;
}
}
return false;
}
void Ftp::LoginCheck(int act)
{
if(conn->ignore_pass)
return;
if(act==530 && Retry530()) // overloaded server?
goto retry;
if(is5XX(act))
{
SetError(LOGIN_FAILED,all_lines);
return;
}
if(!is2XX(act) && !is3XX(act))
{
retry:
Disconnect(line);
NextPeer();
if(peer_curr==0)
reconnect_timer.Reset(); // count the reconnect-interval from this moment
last_connection_failed=true;
}
if(is3XX(act) && !expect->Has(Expect::ACCT_PROXY))
{
if(!QueryStringWithUserAtHost("acct"))
{
Disconnect(line);
SetError(LOGIN_FAILED,_("Account is required, set ftp:acct variable"));
}
}
}
void Ftp::NoPassReqCheck(int act) // for USER command
{
if(is2XX(act)) // in some cases, ftpd does not ask for pass.
{
conn->ignore_pass=true;
return;
}
if(act==331 && allow_skey && user && pass)
{
skey_pass.set(make_skey_reply());
if(force_skey && skey_pass==0)
{
SetError(LOGIN_FAILED,_("ftp:skey-force is set and server does not support OPIE nor S/KEY"));
return;
}
}
if(act==331 && allow_netkey && user && pass)
{
netkey_pass.set(make_netkey_reply());
}
if(is3XX(act))
return;
if(act==530 && Retry530()) // overloaded server?
goto retry;
if(is5XX(act))
{
// proxy interprets USER as user@host, so we check for host name validity
if(proxy && (strstr(line,"host") || strstr(line,"resolve")))
{
LogNote(9,_("assuming failed host name lookup"));
SetError(LOOKUP_ERROR,all_lines);
return;
}
SetError(LOGIN_FAILED,all_lines);
return;
}
retry:
Disconnect(line);
reconnect_timer.Reset(); // count the reconnect-interval from this moment
last_connection_failed=true;
}
// login to proxy.
void Ftp::proxy_LoginCheck(int act)
{
if(is2XX(act))
return;
if(is5XX(act))
{
SetError(LOGIN_FAILED,all_lines);
return;
}
Disconnect(line);
reconnect_timer.Reset(); // count the reconnect-interval from this moment
}
void Ftp::proxy_NoPassReqCheck(int act)
{
if(is3XX(act) || is2XX(act))
return;
if(is5XX(act))
{
SetError(LOGIN_FAILED,all_lines);
return;
}
Disconnect(line);
reconnect_timer.Reset(); // count the reconnect-interval from this moment
}
static void normalize_path_vms(char *path)
{
for(char *s=path; *s; s++)
*s=to_ascii_lower(*s);
char *colon=strchr(path,':');
if(colon)
{
memmove(path+1,path,strlen(path)+1);
path[0]='/';
path=colon+1;
if(path[1]=='[')
memmove(path,path+1,strlen(path));
}
else
{
path=strchr(path,'[');
if(!*path)
return;
}
*path++='/';
while(*path && *path!=']')
{
if(*path=='.')
*path='/';
path++;
}
if(!*path)
return;
if(path[1])
*path='/';
else
*path=0;
}
char *Ftp::ExtractPWD()
{
char *pwd=string_alloca(line.length()+1);
const char *scan=strchr(line,'"');
if(scan==0)
return 0;
scan++;
const char *right_quote=strrchr(scan,'"');
if(!right_quote)
return 0;
char *store=pwd;
while(scan<right_quote)
{
// This is the method of quote encoding.
if(*scan=='"' && scan[1]=='"')
scan++;
*store++=*scan++;
}
if(store==pwd)
return 0; // empty home not allowed.
*store=0;
int dev_len=device_prefix_len(pwd);
if(pwd[dev_len]=='[')
{
conn->vms_path=true;
normalize_path_vms(pwd);
}
else if(dev_len==2 || dev_len==3)
{
conn->dos_path=true;
}
if(!strchr(pwd,'/') || conn->dos_path)
{
// for safety -- against dosish ftpd
for(char *s=pwd; *s; s++)
if(*s=='\\')
*s='/';
}
return xstrdup(pwd);
}
int Ftp::SendCWD(const char *path,const char *path_url,Expect::expect_t c)
{
int cwd_count=0;
if(QueryTriBool("ftp:use-tvfs",0,conn->tvfs_supported)) {
conn->SendCmd2("CWD",path);
expect->Push(new Expect(Expect::CWD_CURR,path));
cwd_count++;
} else if(path_url) {
path_url=url::path_ptr(path_url);
if(path_url[0]=='/')
path_url++;
if(path_url[0]=='~') {
if(path_url[1]==0)
path_url++;
else if(path_url[1]=='/')
path_url+=2;
}
LogNote(9,"using URL path `%s'",path_url);
char *path_url1=alloca_strdup(path_url); // to split it
xstring path2("~");
for(char *dir_url=strtok(path_url1,"/"); dir_url; dir_url=strtok(NULL,"/")) {
const char *dir=url::decode(dir_url);
if(dir[0]=='/')
path2.truncate();
if(path2.length()>0 && path2.last_char()!='/')
path2.append('/');
path2.append(dir);
conn->SendCmd2("CWD",dir);
expect->Push(new Expect(Expect::CWD_CURR,path2));
cwd_count++;
}
} else {
char *path1=alloca_strdup(path); // to split it
char *path2=alloca_strdup(path); // to re-assemble
if(AbsolutePath(path)) {
if(real_cwd && !strncmp(real_cwd,path,real_cwd.length())
&& path[real_cwd.length()]=='/') {
path1+=real_cwd.length()+1;
path2[real_cwd.length()]=0;
} else {
int dev_len=device_prefix_len(path);
dev_len+=(path2[dev_len]=='/');
if(dev_len==1 && path[0]=='/' && real_cwd.ne("/")) {
// just a root directory, append first path component
const char *slash=strchr(path+1,'/');
if(slash)
dev_len=slash-path;
else
dev_len=strlen(path);
}
path2[dev_len]=0;
path1+=dev_len;
if(!path2[0]) {
if(real_cwd && strcmp(real_cwd,"~")
&& (!home.path || strcmp(real_cwd,home.path))) {
conn->SendCmd("CWD");
expect->Push(new Expect(Expect::CWD_CURR,"~"));
cwd_count++;
}
} else if(!real_cwd || strcmp(real_cwd,path2)) {
conn->SendCmd2("CWD",path2);
expect->Push(new Expect(Expect::CWD_CURR,path2));
cwd_count++;
}
}
} else {
strcpy(path2,"~");
if(path1[0]=='~') {
if(path1[1]==0)
path1++;
else if(path1[1]=='/')
path1+=2;
}
if(real_cwd && strcmp(real_cwd,"~")
&& (!home.path || strcmp(real_cwd,home.path))) {
conn->SendCmd("CWD");
expect->Push(new Expect(Expect::CWD_CURR,"~"));
cwd_count++;
}
}
int path2_len=strlen(path2);
for(char *dir=strtok(path1,"/"); dir; dir=strtok(NULL,"/")) {
if(path2_len>0 && path2[path2_len-1]!='/') {
strcpy(path2+path2_len,"/");
path2_len++;
}
strcpy(path2+path2_len,dir);
path2_len+=strlen(dir);
conn->SendCmd2("CWD",dir);
expect->Push(new Expect(Expect::CWD_CURR,path2));
cwd_count++;
}
}
Expect *last_cwd=expect->FindLastCWD();
if(last_cwd)
{
LogNote(9,"CWD path to be sent is `%s'",last_cwd->arg.get());
last_cwd->check_case=c;
}
return cwd_count;
}
Ftp::pasv_state_t Ftp::Handle_PASV()
{
unsigned a0,a1,a2,a3,p0,p1;
/*
* Extract address. RFC1123 says:
* "...must scan the reply for the first digit..."
*/
for(const char *b=line+4; ; b++)
{
if(*b==0)
{
Disconnect(line);
return PASV_NO_ADDRESS_YET;
}
if(!is_ascii_digit(*b))
continue;
if(sscanf(b,"%u,%u,%u,%u,%u,%u",&a0,&a1,&a2,&a3,&p0,&p1)==6)
break;
}
unsigned char *a,*p;
conn->data_sa.sa.sa_family=conn->peer_sa.sa.sa_family;
if(conn->data_sa.sa.sa_family==AF_INET)
{
a=(unsigned char*)&conn->data_sa.in.sin_addr;
p=(unsigned char*)&conn->data_sa.in.sin_port;
}
#if INET6
else if(conn->data_sa.sa.sa_family==AF_INET6)
{
a=((unsigned char*)&conn->data_sa.in6.sin6_addr)+12;
a[-1]=a[-2]=0xff; // V4MAPPED
p=(unsigned char*)&conn->data_sa.in6.sin6_port;
}
#endif
else
{
Disconnect("unsupported address family");
return PASV_NO_ADDRESS_YET;
}
a[0]=a0; a[1]=a1; a[2]=a2; a[3]=a3;
p[0]=p0; p[1]=p1;
bool ignore_pasv_address = QueryBool("ignore-pasv-address",hostname);
if(ignore_pasv_address)
LogNote(2,"Address returned by PASV is ignored according to ftp:ignore-pasv-address setting");
else if(conn->data_sa.is_reserved() || conn->data_sa.is_multicast()
|| (QueryBool("fix-pasv-address",hostname) && !conn->proxy_is_http
&& (conn->data_sa.is_private() != conn->peer_sa.is_private()
|| conn->data_sa.is_loopback() != conn->peer_sa.is_loopback())))
{
// broken server, try to fix up
ignore_pasv_address=true;
conn->fixed_pasv=true;
LogNote(2,"Address returned by PASV seemed to be incorrect and has been fixed");
}
if(ignore_pasv_address)
{
if(conn->data_sa.sa.sa_family==AF_INET)
memcpy(a,&conn->peer_sa.in.sin_addr,sizeof(conn->peer_sa.in.sin_addr));
#if INET6
else if(conn->data_sa.in.sin_family==AF_INET6) // peer_sa should be V4MAPPED
memcpy(a,&conn->peer_sa.in6.sin6_addr.s6_addr[12],4);
#endif
}
return PASV_HAVE_ADDRESS;
}
Ftp::pasv_state_t Ftp::Handle_EPSV()
{
char delim;
char *format=alloca_strdup("|||%u|");
unsigned port;
const char *c=strchr(line,'(');
c=c?c+1:line+4;
delim=*c;
for(char *p=format; *p; p++)
if(*p=='|')
*p=delim;
if(sscanf(c,format,&port)!=1)
{
LogError(0,_("cannot parse EPSV response"));
Disconnect(_("cannot parse EPSV response"));
return PASV_NO_ADDRESS_YET;
}
conn->data_sa=conn->peer_sa;
if(conn->data_sa.sa.sa_family==AF_INET)
conn->data_sa.in.sin_port=htons(port);
#if INET6
else if(conn->data_sa.sa.sa_family==AF_INET6)
conn->data_sa.in6.sin6_port=htons(port);
#endif
else
{
Disconnect("unsupported address family");
return PASV_NO_ADDRESS_YET;
}
return PASV_HAVE_ADDRESS;
}
Ftp::pasv_state_t Ftp::Handle_EPSV_CEPR()
{
unsigned port, proto;
char pasv_addr[40];
const char *c_start=strchr(line,'(');
if(sscanf(c_start, "(|%u|%39[^'|']|%u|)", &proto, pasv_addr, &port)!=3)
{
LogError(0,_("cannot parse custom EPSV response"));
Disconnect(_("cannot parse custom EPSV response"));
return PASV_NO_ADDRESS_YET;
}
conn->data_sa=conn->peer_sa;
// V4 / AF_INET
if (proto == 1)
{
inet_pton(AF_INET, pasv_addr, &conn->data_sa.in.sin_addr);
// conn->data_sa.
conn->data_sa.in.sin_port=htons(port);
conn->data_sa.sa.sa_family=AF_INET;
}
#if INET6
// V6 / AF_INET6
else if (proto == 2)
{
inet_pton(AF_INET6, pasv_addr, &conn->data_sa.in6.sin6_addr);
conn->data_sa.in6.sin6_port=htons(port);
conn->data_sa.sa.sa_family=AF_INET6;
}
#endif
else
{
Disconnect("unsupported address family");
return PASV_NO_ADDRESS_YET;
}
return PASV_HAVE_ADDRESS;
}
void Ftp::CatchDATE(int act)
{
if(!fileset_for_info)
return;
FileInfo *fi=fileset_for_info->curr();
if(!fi)
return;
if(is2XX(act))
{
if(line.length()>4 && is_ascii_digit(line[4]))
fi->SetDate(ConvertFtpDate(line+4),0);
}
else if(is5XX(act))
{
if(cmd_unsupported(act))
conn->mdtm_supported=false;
}
else
{
Disconnect(line);
return;
}
fi->NoNeed(fi->DATE);
if(!(fi->need&fi->SIZE))
fileset_for_info->next();
TrySuccess();
}
void Ftp::CatchDATE_opt(int act)
{
if(!opt_date)
return;
if(is2XX(act) && line.length()>4 && is_ascii_digit(line[4]))
{
*opt_date=ConvertFtpDate(line+4);
opt_date=0;
}
else
{
if(cmd_unsupported(act))
conn->mdtm_supported=false;
*opt_date=NO_DATE;
}
}
void Ftp::CatchSIZE(int act)
{
if(!fileset_for_info)
return;
FileInfo *fi=fileset_for_info->curr();
if(!fi)
return;
long long size=NO_SIZE;
if(is2XX(act))
{
if(line.length()>4) {
if(sscanf(line+4,"%lld",&size)!=1)
size=NO_SIZE;
}
}
else if(is5XX(act))
{
if(cmd_unsupported(act))
conn->size_supported=false;
}
else
{
Disconnect(line);
return;
}
if(size>=1)
fi->SetSize(size);
fi->NoNeed(fi->SIZE);
if(!(fi->need&fi->DATE))
fileset_for_info->next();
TrySuccess();
}
void Ftp::CatchSIZE_opt(int act)
{
long long size=NO_SIZE;
if(is2XX(act))
{
if(line.length()>4) {
if(sscanf(line+4,"%lld",&size)!=1)
size=NO_SIZE;
}
}
else
{
if(cmd_unsupported(act))
conn->size_supported=false;
}
// SIZE 0 is ignored (for some buggy servers).
if(size<1)
return;
if(mode==RETRIEVE)
entity_size=size;
if(opt_size)
{
*opt_size=size;
opt_size=0;
}
}
Ftp::Connection::Connection(const char *c)
: closure(c), send_cmd_buffer(DirectedBuffer::PUT)
{
control_sock=-1;
telnet_layer_send=0;
data_sock=-1;
aborted_data_sock=-1;
#if USE_SSL
prot='C'; // current protection scheme 'C'lear or 'P'rivate
auth_sent=false;
auth_supported=true;
cpsv_supported=false;
sscn_supported=true;
sscn_on=false;
#endif