1717 lines
42 KiB
C
1717 lines
42 KiB
C
/* opieftpd.c: Main program for an FTP daemon.
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%%% portions-copyright-cmetz-96
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Portions of this software are Copyright 1996-1998 by Craig Metz, All Rights
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Reserved. The Inner Net License Version 2 applies to these portions of
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the software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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Portions of this software are Copyright 1995 by Randall Atkinson and Dan
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McDonald, All Rights Reserved. All Rights under this copyright are assigned
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to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
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License Agreement applies to this software.
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History:
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Modified by cmetz for OPIE 2.32. Remove include of dirent.h here; it's
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done already (and conditionally) in opie_cfg.h.
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Modified by cmetz for OPIE 2.31. Merged in some 4.4BSD-Lite changes.
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Merged in a security fix to BSD-derived ftpds.
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Modified by cmetz for OPIE 2.3. Fixed the filename at the top.
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Moved LS_COMMAND here.
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Modified by cmetz for OPIE 2.2. Use FUNCTION definition et al.
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Removed useless strings (I don't think that removing the
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ucb copyright one is a problem -- please let me know if
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I'm wrong). Changed default CMASK to 077. Removed random
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comments. Use ANSI stdargs for reply/lreply if we can,
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added stdargs version of reply/lreply. Don't declare the
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tos variable unless IP_TOS defined. Include stdargs headers
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early. More headers ifdefed. Made everything static.
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Got rid of gethostname() call and use of hostname. Pared
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down status response for places where header files frequently
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cause trouble. Made logging of user logins (ala -l)
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non-optional. Moved reply()/lrepy(). Fixed some prototypes.
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Modified at NRL for OPIE 2.1. Added declaration of envp. Discard
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result of opiechallenge (allows access control to work).
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Added patches for AIX. Symbol changes for autoconf.
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Modified at NRL for OPIE 2.01. Changed password lookup handling
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to avoid problems with drain-bamaged shadow password packages.
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Properly handle internal state for anonymous FTP. Unlock
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user accounts properly if login fails because of /etc/shells.
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Make sure to close syslog by function to avoid problems with
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drain bamaged syslog implementations.
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Modified at NRL for OPIE 2.0.
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Originally from BSD Net/2.
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There is some really, really ugly code in here.
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$FreeBSD$
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*/
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/*
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* Copyright (c) 1985, 1988, 1990 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "opie_cfg.h"
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#if HAVE_ANSISTDARG
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#include <stdarg.h>
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#endif /* HAVE_ANSISTDARG */
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/*
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* FTP server.
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*/
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#if HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif /* HAVE_SYS_PARAM_H */
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#include <sys/stat.h>
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/* #include <sys/ioctl.h> */
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#include <sys/socket.h>
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#include <sys/wait.h>
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#ifdef SYS_FCNTL_H
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#include <sys/fcntl.h>
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#else
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#include <fcntl.h>
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#endif /* SYS_FCNTL_H */
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#define FTP_NAMES
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#include <arpa/ftp.h>
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#include <arpa/inet.h>
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#include <arpa/telnet.h>
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#include <signal.h>
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#include <fcntl.h>
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#if HAVE_TIME_H
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#include <time.h>
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#endif /* HAVE_TIME_H */
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#if HAVE_PWD_H
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#include <pwd.h>
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#endif /* HAVE_PWD_H */
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#include <setjmp.h>
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#include <netdb.h>
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#include <errno.h>
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#include <syslog.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <grp.h>
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#include "opie.h"
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#if HAVE_SHADOW_H
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#include <shadow.h>
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#endif /* HAVE_SHADOW_H */
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#if HAVE_CRYPT_H
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#include <crypt.h>
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#endif /* HAVE_CRYPT_H */
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#if HAVE_SYS_UTSNAME_H
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#include <sys/utsname.h>
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#endif /* HAVE_SYS_UTSNAME_H */
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#ifdef _AIX
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#include <sys/id.h>
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#include <sys/priv.h>
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#endif /* _AIX */
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#ifdef IP_TOS
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#ifndef IPTOS_THROUGHPUT
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#undef IP_TOS
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#endif /* !IPTOS_THROUGHPUT */
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#ifndef IPTOS_LOWDELAY
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#undef IP_TOS
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#endif /* !IPTOS_LOWDELAY */
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#endif /* IP_TOS */
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extern int errno;
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extern char *home; /* pointer to home directory for glob */
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extern FILE *ftpd_popen __P((char *, char *));
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extern int ftpd_pclose __P((FILE *));
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extern char cbuf[];
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extern off_t restart_point;
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static struct sockaddr_in ctrl_addr;
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static struct sockaddr_in data_source;
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struct sockaddr_in data_dest;
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struct sockaddr_in his_addr;
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static struct sockaddr_in pasv_addr;
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static int data;
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jmp_buf errcatch;
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static jmp_buf urgcatch;
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int logged_in;
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struct passwd *pw;
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int debug;
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int timeout = 900; /* timeout after 15 minutes of inactivity */
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int maxtimeout = 7200; /* don't allow idle time to be set beyond 2 hours */
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#if DOANONYMOUS
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static int guest;
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#endif /* DOANONYMOUS */
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int type;
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int form;
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static int stru; /* avoid C keyword */
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static int mode;
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int usedefault = 1; /* for data transfers */
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int pdata = -1; /* for passive mode */
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static int transflag;
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static off_t file_size;
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static off_t byte_count;
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#if (!defined(CMASK) || CMASK == 0)
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#undef CMASK
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#define CMASK 077
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#endif
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static int defumask = CMASK; /* default umask value */
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char tmpline[7];
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char remotehost[MAXHOSTNAMELEN];
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/*
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* Timeout intervals for retrying connections
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* to hosts that don't accept PORT cmds. This
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* is a kludge, but given the problems with TCP...
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*/
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#define SWAITMAX 90 /* wait at most 90 seconds */
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#define SWAITINT 5 /* interval between retries */
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static int swaitmax = SWAITMAX;
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static int swaitint = SWAITINT;
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#if DOTITLE
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static char **Argv = NULL; /* pointer to argument vector */
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static char *LastArgv = NULL; /* end of argv */
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static char proctitle[BUFSIZ]; /* initial part of title */
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#endif /* DOTITLE */
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static int af_pwok = 0, pwok = 0;
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static struct opie opiestate;
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VOIDRET perror_reply __P((int, char *));
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VOIDRET dologout __P((int));
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char *getline __P((char *, int, FILE *));
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VOIDRET upper __P((char *));
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static VOIDRET lostconn __P((int));
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static VOIDRET myoob __P((int));
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static FILE *getdatasock __P((char *));
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static FILE *dataconn __P((char *, off_t, char *));
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static int checkuser __P((char *));
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static VOIDRET end_login __P((void));
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static VOIDRET send_data __P((FILE *, FILE *, off_t));
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static int receive_data __P((FILE *, FILE *));
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static char *gunique __P((char *));
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static char *sgetsave __P((char *));
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int opielogwtmp __P((char *, char *, char *));
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int fclose __P((FILE *));
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#ifdef HAVE_ANSISTDARG
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VOIDRET reply FUNCTION((stdarg is ANSI only), int n AND char *fmt AND ...)
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{
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va_list ap;
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char buffer[1024];
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va_start(ap, fmt);
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vsprintf(buffer, fmt, ap);
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va_end(ap);
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printf("%d %s\r\n", n, buffer);
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fflush(stdout);
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if (debug)
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syslog(LOG_DEBUG, "<--- %d %s", n, buffer);
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}
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#else /* HAVE_ANSISTDARG */
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VOIDRET reply FUNCTION((n, fmt, p0, p1, p2, p3, p4, p5), int n AND char *fmt AND int p0 AND int p1 AND int p2 AND int p3 AND int p4 AND int p5)
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{
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printf("%d ", n);
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printf(fmt, p0, p1, p2, p3, p4, p5);
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printf("\r\n");
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fflush(stdout);
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if (debug) {
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syslog(LOG_DEBUG, "<--- %d ", n);
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syslog(LOG_DEBUG, fmt, p0, p1, p2, p3, p4, p5);
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}
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}
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#endif /* HAVE_ANSISTDARG */
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#ifdef HAVE_ANSISTDARG
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VOIDRET lreply FUNCTION((stdarg is ANSI only), int n AND char *fmt AND ...)
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{
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va_list ap;
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char buffer[1024];
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va_start(ap, fmt);
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vsprintf(buffer, fmt, ap);
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va_end(ap);
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printf("%d- %s\r\n", n, buffer);
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fflush(stdout);
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if (debug)
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syslog(LOG_DEBUG, "<--- %d- %s", n, buffer);
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}
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#else /* HAVE_ANSISTDARG */
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VOIDRET lreply FUNCTION((n, fmt, p0, p1, p2, p3, p4, p5), int n AND char *fmt AND int p0 AND int p1 AND int p2 AND int p3 AND int p4 AND int p5)
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{
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printf("%d- ", n);
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printf(fmt, p0, p1, p2, p3, p4, p5);
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printf("\r\n");
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fflush(stdout);
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if (debug) {
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syslog(LOG_DEBUG, "<--- %d- ", n);
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syslog(LOG_DEBUG, fmt, p0, p1, p2, p3, p4, p5);
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}
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}
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#endif /* HAVE_ANSISTDARG */
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VOIDRET enable_signalling FUNCTION_NOARGS
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{
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signal(SIGPIPE, lostconn);
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if ((int)signal(SIGURG, myoob) < 0)
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syslog(LOG_ERR, "signal: %m");
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}
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VOIDRET disable_signalling FUNCTION_NOARGS
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{
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signal(SIGPIPE, SIG_IGN);
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if ((int)signal(SIGURG, SIG_IGN) < 0)
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syslog(LOG_ERR, "signal: %m");
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}
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static VOIDRET lostconn FUNCTION((input), int input)
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{
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if (debug)
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syslog(LOG_DEBUG, "lost connection");
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dologout(-1);
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}
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static char ttyline[20];
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/*
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* Helper function for sgetpwnam().
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*/
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static char *sgetsave FUNCTION((s), char *s)
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{
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char *new = malloc((unsigned) strlen(s) + 1);
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if (new == NULL) {
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perror_reply(421, "Local resource failure: malloc");
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dologout(1);
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/* NOTREACHED */
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}
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strcpy(new, s);
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return (new);
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}
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/*
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* Save the result of a getpwnam. Used for USER command, since
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* the data returned must not be clobbered by any other command
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* (e.g., globbing).
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*/
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static struct passwd *sgetpwnam FUNCTION((name), char *name)
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{
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static struct passwd save;
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register struct passwd *p;
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#if HAVE_SHADOW
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struct spwd *spwd;
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#endif /* HAVE_SHADOW */
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if ((p = getpwnam(name)) == NULL)
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return (p);
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#if HAVE_SHADOW
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if ((spwd = getspnam(name)) == NULL)
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return NULL;
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endspent();
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p->pw_passwd = spwd->sp_pwdp;
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#endif /* HAVE_SHADOW */
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endpwent();
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if (save.pw_name) {
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free(save.pw_name);
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free(save.pw_passwd);
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free(save.pw_gecos);
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free(save.pw_dir);
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free(save.pw_shell);
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}
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save = *p;
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save.pw_name = sgetsave(p->pw_name);
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save.pw_passwd = sgetsave(p->pw_passwd);
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save.pw_gecos = sgetsave(p->pw_gecos);
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save.pw_dir = sgetsave(p->pw_dir);
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save.pw_shell = sgetsave(p->pw_shell);
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return (&save);
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}
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int login_attempts; /* number of failed login attempts */
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int askpasswd; /* had user command, ask for passwd */
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/*
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* USER command.
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* Sets global passwd pointer pw if named account exists and is acceptable;
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* sets askpasswd if a PASS command is expected. If logged in previously,
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* need to reset state. If name is "ftp" or "anonymous", the name is not in
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* _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
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* If account doesn't exist, ask for passwd anyway. Otherwise, check user
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* requesting login privileges. Disallow anyone who does not have a standard
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* shell as returned by getusershell(). Disallow anyone mentioned in the file
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* _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
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*/
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int user FUNCTION((name), char *name)
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{
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register char *cp;
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char *shell;
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if (logged_in) {
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#if DOANONYMOUS
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if (guest) {
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reply(530, "Can't change user from guest login.");
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return -1;
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}
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#endif /* DOANONMOUS */
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end_login();
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}
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askpasswd = 1;
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#if DOANONYMOUS
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guest = 0;
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if (!strcmp(name, "ftp") || !strcmp(name, "anonymous"))
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if (!checkuser("ftp") && !checkuser("anonymous"))
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if ((pw = sgetpwnam("ftp")) != NULL) {
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guest = 1;
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askpasswd = 1;
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reply(331, "Guest login ok, send your e-mail address as your password.");
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syslog(LOG_INFO, "Anonymous FTP connection made from host %s.", remotehost);
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return 0;
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}
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#endif /* DOANONYMOUS */
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if (pw = sgetpwnam(name)) {
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if ((shell = pw->pw_shell) == NULL || *shell == 0)
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shell = _PATH_BSHELL;
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while ((cp = getusershell()) != NULL)
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if (!strcmp(cp, shell))
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break;
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endusershell();
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if (cp == NULL || checkuser(name) || ((pw->pw_passwd[0] == '*') || (pw->pw_passwd[0] == '#'))) {
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#if DEBUG
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if (!cp)
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syslog(LOG_DEBUG, "Couldn't find %s in the list of valid shells.", pw->pw_shell);
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if (checkuser(name))
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syslog(LOG_DEBUG, "checkuser failed - user in /etc/ftpusers?");
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if (((pw->pw_passwd[0] == '*') || (pw->pw_passwd[0] == '#')))
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syslog(LOG_DEBUG, "Login disabled: pw_passwd == %s", pw->pw_passwd);
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#endif /* DEBUG */
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pw = (struct passwd *) NULL;
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askpasswd = -1;
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}
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}
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{
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char prompt[OPIE_CHALLENGE_MAX + 1];
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opiechallenge(&opiestate, name, prompt);
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if (askpasswd == -1) {
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syslog(LOG_WARNING, "Invalid FTP user name %s attempted from %s.", name, remotehost);
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pwok = 0;
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} else
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pwok = af_pwok && opiealways(pw->pw_dir);
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#if NEW_PROMPTS
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reply(331, "Response to %s %s for %s.", prompt,
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#else /* NEW_PROMPTS */
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reply(331, "OTP response %s %s for %s.", prompt,
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#endif /* NEW_PROMPTS */
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pwok ? "requested" : "required", name);
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}
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/* Delay before reading passwd after first failed attempt to slow down
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passwd-guessing programs. */
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if (login_attempts)
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sleep((unsigned) login_attempts);
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return 0;
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}
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/*
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* Check if a user is in the file _PATH_FTPUSERS
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*/
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static int checkuser FUNCTION((name), char *name)
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{
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register FILE *fd;
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register char *p;
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char line[BUFSIZ];
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if ((fd = fopen(_PATH_FTPUSERS, "r")) != NULL) {
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while (fgets(line, sizeof(line), fd) != NULL)
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if ((p = strchr(line, '\n')) != NULL) {
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*p = '\0';
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if (line[0] == '#')
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continue;
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if (!strcmp(line, name)) {
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fclose(fd);
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return (1);
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|
}
|
|
}
|
|
fclose(fd);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Terminate login as previous user, if any, resetting state;
|
|
* used when USER command is given or login fails.
|
|
*/
|
|
static VOIDRET end_login FUNCTION_NOARGS
|
|
{
|
|
disable_signalling();
|
|
if (seteuid((uid_t) 0))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
if (logged_in)
|
|
opielogwtmp(ttyline, "", "");
|
|
pw = NULL;
|
|
logged_in = 0;
|
|
#if DOANONYMOUS
|
|
guest = 0;
|
|
#endif /* DOANONYMOUS */
|
|
enable_signalling();
|
|
}
|
|
|
|
VOIDRET pass FUNCTION((passwd), char *passwd)
|
|
{
|
|
int legit = askpasswd + 1, i;
|
|
|
|
if (logged_in || askpasswd == 0) {
|
|
reply(503, "Login with USER first.");
|
|
return;
|
|
}
|
|
askpasswd = 0;
|
|
|
|
#if DOANONYMOUS
|
|
if (!guest) { /* "ftp" is only account allowed no password */
|
|
#endif /* DOANONYMOUS */
|
|
i = opieverify(&opiestate, passwd);
|
|
if (legit && i && pwok)
|
|
i = strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd);
|
|
if (!legit || i) {
|
|
reply(530, "Login incorrect.");
|
|
pw = NULL;
|
|
if (login_attempts++ >= 5) {
|
|
syslog(LOG_WARNING,
|
|
"Repeated login failures for user %s from %s",
|
|
pw->pw_name, remotehost);
|
|
exit(0);
|
|
}
|
|
return;
|
|
}
|
|
#if DOANONYMOUS
|
|
} else
|
|
if ((passwd[0] <= ' ') || checkuser(passwd)) {
|
|
reply(530, "No identity, no service.");
|
|
syslog(LOG_DEBUG, "Bogus address: %s", passwd);
|
|
exit(0);
|
|
}
|
|
#endif /* DOANONYMOUS */
|
|
login_attempts = 0; /* this time successful */
|
|
if (setegid((gid_t) pw->pw_gid) < 0) {
|
|
reply(550, "Can't set gid.");
|
|
syslog(LOG_DEBUG, "gid = %d, errno = %s(%d)", pw->pw_gid, strerror(errno), errno);
|
|
return;
|
|
}
|
|
initgroups(pw->pw_name, pw->pw_gid);
|
|
|
|
/* open wtmp before chroot */
|
|
sprintf(ttyline, "ftp%d", getpid());
|
|
opielogwtmp(ttyline, pw->pw_name, remotehost);
|
|
logged_in = 1;
|
|
|
|
#if DOANONYMOUS
|
|
if (guest) {
|
|
/* We MUST do a chdir() after the chroot. Otherwise the old current
|
|
directory will be accessible as "." outside the new root! */
|
|
if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
|
|
reply(550, "Can't set guest privileges.");
|
|
goto bad;
|
|
}
|
|
} else
|
|
#endif /* DOANONYMOUS */
|
|
if (chdir(pw->pw_dir) < 0) {
|
|
if (chdir("/") < 0) {
|
|
reply(530, "User %s: can't change directory to %s.",
|
|
pw->pw_name, pw->pw_dir);
|
|
goto bad;
|
|
} else
|
|
lreply(230, "No directory! Logging in with home=/");
|
|
}
|
|
/* This patch was contributed by an OPIE user. We don't know what it
|
|
does, exactly. It may or may not work. */
|
|
#ifdef _AIX
|
|
{
|
|
priv_t priv;
|
|
priv.pv_priv[0] = 0;
|
|
priv.pv_priv[1] = 0;
|
|
setgroups(NULL, NULL);
|
|
if (setpriv(PRIV_SET|PRIV_INHERITED|PRIV_EFFECTIVE|PRIV_BEQUEATH,
|
|
&priv, sizeof(priv_t)) < 0 ||
|
|
setgidx(ID_REAL|ID_EFFECTIVE, (gid_t)pw->pw_gid) < 0 ||
|
|
setuidx(ID_REAL|ID_EFFECTIVE, (uid_t)pw->pw_uid) < 0 ||
|
|
seteuid((uid_t)pw->pw_uid) < 0) {
|
|
reply(550, "Can't set uid (_AIX3).");
|
|
goto bad;
|
|
}
|
|
}
|
|
#else /* _AIX */
|
|
if (seteuid((uid_t) pw->pw_uid) < 0) {
|
|
reply(550, "Can't set uid.");
|
|
goto bad;
|
|
}
|
|
#endif /* _AIX */
|
|
/*
|
|
* Display a login message, if it exists.
|
|
* N.B. reply(230,) must follow the message.
|
|
*/
|
|
{
|
|
FILE *fd;
|
|
|
|
if ((fd = fopen(_PATH_FTPLOGINMESG, "r")) != NULL) {
|
|
char *cp, line[128];
|
|
|
|
while (fgets(line, sizeof(line), fd) != NULL) {
|
|
if ((cp = strchr(line, '\n')) != NULL)
|
|
*cp = '\0';
|
|
lreply(230, "%s", line);
|
|
}
|
|
(void) fflush(stdout);
|
|
(void) fclose(fd);
|
|
}
|
|
}
|
|
#if DOANONYMOUS
|
|
if (guest) {
|
|
reply(230, "Guest login ok, access restrictions apply.");
|
|
#if DOTITLE
|
|
snprintf(proctitle, sizeof(proctitle), "%s: anonymous/%s", remotehost,
|
|
passwd);
|
|
setproctitle("%s", proctitle);
|
|
#endif /* DOTITLE */
|
|
syslog(LOG_NOTICE, "ANONYMOUS FTP login from %s with ID %s",
|
|
remotehost, passwd);
|
|
} else
|
|
#endif /* DOANONYMOUS */
|
|
{
|
|
reply(230, "User %s logged in.", pw->pw_name);
|
|
|
|
#if DOTITLE
|
|
snprintf(proctitle, sizeof(proctitle), "%s: %s", remotehost, pw->pw_name);
|
|
setproctitle("%s", proctitle);
|
|
#endif /* DOTITLE */
|
|
syslog(LOG_INFO, "FTP login from %s with user name %s", remotehost, pw->pw_name);
|
|
}
|
|
home = pw->pw_dir; /* home dir for globbing */
|
|
umask(defumask);
|
|
return;
|
|
|
|
bad:
|
|
/* Forget all about it... */
|
|
end_login();
|
|
}
|
|
|
|
VOIDRET retrieve FUNCTION((cmd, name), char *cmd AND char *name)
|
|
{
|
|
FILE *fin, *dout;
|
|
struct stat st;
|
|
int (*closefunc) ();
|
|
|
|
if (cmd == 0) {
|
|
fin = fopen(name, "r"), closefunc = fclose;
|
|
st.st_size = 0;
|
|
} else {
|
|
char line[BUFSIZ];
|
|
|
|
snprintf(line, sizeof(line), cmd, name);
|
|
name = line;
|
|
fin = ftpd_popen(line, "r"), closefunc = ftpd_pclose;
|
|
st.st_size = -1;
|
|
#if HAVE_ST_BLKSIZE
|
|
st.st_blksize = BUFSIZ;
|
|
#endif /* HAVE_ST_BLKSIZE */
|
|
}
|
|
if (fin == NULL) {
|
|
if (errno != 0)
|
|
perror_reply(550, name);
|
|
return;
|
|
}
|
|
if (cmd == 0 &&
|
|
(fstat(fileno(fin), &st) < 0 || (st.st_mode & S_IFMT) != S_IFREG)) {
|
|
reply(550, "%s: not a plain file.", name);
|
|
goto done;
|
|
}
|
|
if (restart_point) {
|
|
if (type == TYPE_A) {
|
|
register int i, n, c;
|
|
|
|
n = restart_point;
|
|
i = 0;
|
|
while (i++ < n) {
|
|
if ((c = getc(fin)) == EOF) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
if (c == '\n')
|
|
i++;
|
|
}
|
|
} else
|
|
if (lseek(fileno(fin), restart_point, SEEK_SET /* L_SET */ ) < 0) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
}
|
|
dout = dataconn(name, st.st_size, "w");
|
|
if (dout == NULL)
|
|
goto done;
|
|
#if HAVE_ST_BLKSIZE
|
|
send_data(fin, dout, st.st_blksize);
|
|
#else /* HAVE_ST_BLKSIZE */
|
|
send_data(fin, dout, BUFSIZ);
|
|
#endif /* HAVE_ST_BLKSIZE */
|
|
fclose(dout);
|
|
data = -1;
|
|
pdata = -1;
|
|
done:
|
|
(*closefunc) (fin);
|
|
}
|
|
|
|
VOIDRET store FUNCTION((name, mode, unique), char *name AND char *mode AND int unique)
|
|
{
|
|
FILE *fout, *din;
|
|
struct stat st;
|
|
int (*closefunc) ();
|
|
|
|
if (unique && stat(name, &st) == 0 &&
|
|
(name = gunique(name)) == NULL)
|
|
return;
|
|
|
|
if (restart_point)
|
|
mode = "r+w";
|
|
fout = fopen(name, mode);
|
|
closefunc = fclose;
|
|
if (fout == NULL) {
|
|
perror_reply(553, name);
|
|
return;
|
|
}
|
|
if (restart_point) {
|
|
if (type == TYPE_A) {
|
|
register int i, n, c;
|
|
|
|
n = restart_point;
|
|
i = 0;
|
|
while (i++ < n) {
|
|
if ((c = getc(fout)) == EOF) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
if (c == '\n')
|
|
i++;
|
|
}
|
|
/* We must do this seek to "current" position because we are changing
|
|
from reading to writing. */
|
|
if (fseek(fout, 0L, SEEK_CUR /* L_INCR */ ) < 0) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
} else
|
|
if (lseek(fileno(fout), restart_point, SEEK_SET /* L_SET */ ) < 0) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
}
|
|
din = dataconn(name, (off_t) - 1, "r");
|
|
if (din == NULL)
|
|
goto done;
|
|
if (receive_data(din, fout) == 0) {
|
|
if (unique)
|
|
reply(226, "Transfer complete (unique file name:%s).",
|
|
name);
|
|
else
|
|
reply(226, "Transfer complete.");
|
|
}
|
|
fclose(din);
|
|
data = -1;
|
|
pdata = -1;
|
|
done:
|
|
(*closefunc) (fout);
|
|
}
|
|
|
|
static FILE *getdatasock FUNCTION((mode), char *mode)
|
|
{
|
|
int s, on = 1, tries;
|
|
|
|
if (data >= 0)
|
|
return (fdopen(data, mode));
|
|
disable_signalling();
|
|
if (seteuid((uid_t) 0))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
s = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (s < 0)
|
|
goto bad;
|
|
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
|
|
(char *) &on, sizeof(on)) < 0)
|
|
goto bad;
|
|
/* anchor socket to avoid multi-homing problems */
|
|
data_source.sin_family = AF_INET;
|
|
data_source.sin_addr = ctrl_addr.sin_addr;
|
|
for (tries = 1;; tries++) {
|
|
if (bind(s, (struct sockaddr *) & data_source,
|
|
sizeof(data_source)) >= 0)
|
|
break;
|
|
if (errno != EADDRINUSE || tries > 10)
|
|
goto bad;
|
|
sleep(tries);
|
|
}
|
|
if (seteuid((uid_t) pw->pw_uid))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
enable_signalling();
|
|
#ifdef IP_TOS
|
|
on = IPTOS_THROUGHPUT;
|
|
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *) &on, sizeof(int)) < 0)
|
|
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
|
|
#endif
|
|
return (fdopen(s, mode));
|
|
bad:
|
|
{
|
|
int t = errno;
|
|
|
|
if (seteuid((uid_t) pw->pw_uid))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
enable_signalling();
|
|
close(s);
|
|
|
|
errno = t;
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static FILE *dataconn FUNCTION((name, size, mode), char *name AND off_t size AND char *mode)
|
|
{
|
|
char sizebuf[32];
|
|
FILE *file;
|
|
int retry = 0;
|
|
#ifdef IP_TOS
|
|
int tos;
|
|
#endif /* IP_TOS */
|
|
|
|
file_size = size;
|
|
byte_count = 0;
|
|
if (size != (off_t) - 1)
|
|
snprintf(sizebuf, sizeof(sizebuf), " (%ld bytes)", size);
|
|
else
|
|
strcpy(sizebuf, "");
|
|
if (pdata >= 0) {
|
|
struct sockaddr_in from;
|
|
int s, fromlen = sizeof(from);
|
|
|
|
s = accept(pdata, (struct sockaddr *) & from, &fromlen);
|
|
if (s < 0) {
|
|
reply(425, "Can't open data connection.");
|
|
close(pdata);
|
|
pdata = -1;
|
|
return (NULL);
|
|
}
|
|
close(pdata);
|
|
pdata = s;
|
|
#ifdef IP_TOS
|
|
tos = IPTOS_LOWDELAY;
|
|
setsockopt(s, IPPROTO_IP, IP_TOS, (char *) &tos,
|
|
sizeof(int));
|
|
|
|
#endif
|
|
reply(150, "Opening %s mode data connection for %s%s.",
|
|
type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
|
|
return (fdopen(pdata, mode));
|
|
}
|
|
if (data >= 0) {
|
|
reply(125, "Using existing data connection for %s%s.",
|
|
name, sizebuf);
|
|
usedefault = 1;
|
|
return (fdopen(data, mode));
|
|
}
|
|
if (usedefault)
|
|
data_dest = his_addr;
|
|
usedefault = 1;
|
|
file = getdatasock(mode);
|
|
if (file == NULL) {
|
|
reply(425, "Can't create data socket (%s,%d): %s.",
|
|
inet_ntoa(data_source.sin_addr),
|
|
ntohs(data_source.sin_port), strerror(errno));
|
|
return (NULL);
|
|
}
|
|
data = fileno(file);
|
|
while (connect(data, (struct sockaddr *) & data_dest,
|
|
sizeof(data_dest)) < 0) {
|
|
if (errno == EADDRINUSE && retry < swaitmax) {
|
|
sleep((unsigned) swaitint);
|
|
retry += swaitint;
|
|
continue;
|
|
}
|
|
perror_reply(425, "Can't build data connection");
|
|
fclose(file);
|
|
data = -1;
|
|
return (NULL);
|
|
}
|
|
reply(150, "Opening %s mode data connection for %s%s.",
|
|
type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf);
|
|
return (file);
|
|
}
|
|
|
|
/*
|
|
* Tranfer the contents of "instr" to
|
|
* "outstr" peer using the appropriate
|
|
* encapsulation of the data subject
|
|
* to Mode, Structure, and Type.
|
|
*
|
|
* NB: Form isn't handled.
|
|
*/
|
|
static VOIDRET send_data FUNCTION((instr, outstr, blksize), FILE *instr AND FILE *outstr AND off_t blksize)
|
|
{
|
|
register int c, cnt;
|
|
register char *buf;
|
|
int netfd, filefd;
|
|
|
|
transflag++;
|
|
if (setjmp(urgcatch)) {
|
|
transflag = 0;
|
|
return;
|
|
}
|
|
switch (type) {
|
|
|
|
case TYPE_A:
|
|
while ((c = getc(instr)) != EOF) {
|
|
byte_count++;
|
|
if (c == '\n') {
|
|
if (ferror(outstr))
|
|
goto data_err;
|
|
putc('\r', outstr);
|
|
}
|
|
putc(c, outstr);
|
|
}
|
|
fflush(outstr);
|
|
transflag = 0;
|
|
if (ferror(instr))
|
|
goto file_err;
|
|
if (ferror(outstr))
|
|
goto data_err;
|
|
reply(226, "Transfer complete.");
|
|
return;
|
|
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
if ((buf = malloc((u_int) blksize)) == NULL) {
|
|
transflag = 0;
|
|
perror_reply(451, "Local resource failure: malloc");
|
|
return;
|
|
}
|
|
netfd = fileno(outstr);
|
|
filefd = fileno(instr);
|
|
while ((cnt = read(filefd, buf, (u_int) blksize)) > 0 &&
|
|
write(netfd, buf, cnt) == cnt)
|
|
byte_count += cnt;
|
|
transflag = 0;
|
|
free(buf);
|
|
if (cnt != 0) {
|
|
if (cnt < 0)
|
|
goto file_err;
|
|
goto data_err;
|
|
}
|
|
reply(226, "Transfer complete.");
|
|
return;
|
|
default:
|
|
transflag = 0;
|
|
reply(550, "Unimplemented TYPE %d in send_data", type);
|
|
return;
|
|
}
|
|
|
|
data_err:
|
|
transflag = 0;
|
|
perror_reply(426, "Data connection");
|
|
return;
|
|
|
|
file_err:
|
|
transflag = 0;
|
|
perror_reply(551, "Error on input file");
|
|
}
|
|
|
|
/*
|
|
* Transfer data from peer to
|
|
* "outstr" using the appropriate
|
|
* encapulation of the data subject
|
|
* to Mode, Structure, and Type.
|
|
*
|
|
* N.B.: Form isn't handled.
|
|
*/
|
|
static int receive_data FUNCTION((instr, outstr), FILE *instr AND FILE *outstr)
|
|
{
|
|
register int c;
|
|
int cnt, bare_lfs = 0;
|
|
char buf[BUFSIZ];
|
|
|
|
transflag++;
|
|
if (setjmp(urgcatch)) {
|
|
transflag = 0;
|
|
return (-1);
|
|
}
|
|
switch (type) {
|
|
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
while ((cnt = read(fileno(instr), buf, sizeof buf)) > 0) {
|
|
if (write(fileno(outstr), buf, cnt) != cnt)
|
|
goto file_err;
|
|
byte_count += cnt;
|
|
}
|
|
if (cnt < 0)
|
|
goto data_err;
|
|
transflag = 0;
|
|
return (0);
|
|
|
|
case TYPE_E:
|
|
reply(553, "TYPE E not implemented.");
|
|
transflag = 0;
|
|
return (-1);
|
|
|
|
case TYPE_A:
|
|
while ((c = getc(instr)) != EOF) {
|
|
byte_count++;
|
|
if (c == '\n')
|
|
bare_lfs++;
|
|
while (c == '\r') {
|
|
if (ferror(outstr))
|
|
goto data_err;
|
|
if ((c = getc(instr)) != '\n') {
|
|
putc('\r', outstr);
|
|
if (c == '\0' || c == EOF)
|
|
goto contin2;
|
|
}
|
|
}
|
|
putc(c, outstr);
|
|
contin2:;
|
|
}
|
|
fflush(outstr);
|
|
if (ferror(instr))
|
|
goto data_err;
|
|
if (ferror(outstr))
|
|
goto file_err;
|
|
transflag = 0;
|
|
if (bare_lfs) {
|
|
lreply(230, "WARNING! %d bare linefeeds received in ASCII mode", bare_lfs);
|
|
printf(" File may not have transferred correctly.\r\n");
|
|
}
|
|
return (0);
|
|
default:
|
|
reply(550, "Unimplemented TYPE %d in receive_data", type);
|
|
transflag = 0;
|
|
return (-1);
|
|
}
|
|
|
|
data_err:
|
|
transflag = 0;
|
|
perror_reply(426, "Data Connection");
|
|
return (-1);
|
|
|
|
file_err:
|
|
transflag = 0;
|
|
perror_reply(452, "Error writing file");
|
|
return (-1);
|
|
}
|
|
|
|
VOIDRET statfilecmd FUNCTION((filename), char *filename)
|
|
{
|
|
char line[BUFSIZ];
|
|
FILE *fin;
|
|
int c;
|
|
|
|
#if HAVE_LS_G_FLAG
|
|
snprintf(line, sizeof(line), "%s %s", "/bin/ls -lgA", filename);
|
|
#else /* HAVE_LS_G_FLAG */
|
|
snprintf(line, sizeof(line), "%s %s", "/bin/ls -lA", filename);
|
|
#endif /* HAVE_LS_G_FLAG */
|
|
fin = ftpd_popen(line, "r");
|
|
lreply(211, "status of %s:", filename);
|
|
while ((c = getc(fin)) != EOF) {
|
|
if (c == '\n') {
|
|
if (ferror(stdout)) {
|
|
perror_reply(421, "control connection");
|
|
ftpd_pclose(fin);
|
|
dologout(1);
|
|
/* NOTREACHED */
|
|
}
|
|
if (ferror(fin)) {
|
|
perror_reply(551, filename);
|
|
ftpd_pclose(fin);
|
|
return;
|
|
}
|
|
putc('\r', stdout);
|
|
}
|
|
putc(c, stdout);
|
|
}
|
|
ftpd_pclose(fin);
|
|
reply(211, "End of Status");
|
|
}
|
|
|
|
VOIDRET statcmd FUNCTION_NOARGS
|
|
{
|
|
/* COMMENTED OUT STUFF BECAUSE THINGS BROKE ON SUNOS. */
|
|
struct sockaddr_in *sin;
|
|
u_char *a, *p;
|
|
|
|
lreply(211, "FTP server status:");
|
|
printf(" \r\n");
|
|
printf(" Connected to %s", remotehost);
|
|
if (!isdigit(remotehost[0]))
|
|
printf(" (%s)", inet_ntoa(his_addr.sin_addr));
|
|
printf("\r\n");
|
|
if (logged_in) {
|
|
#if DOANONYMOUS
|
|
if (guest)
|
|
printf(" Logged in anonymously\r\n");
|
|
else
|
|
#endif /* DOANONYMOUS */
|
|
printf(" Logged in as %s\r\n", pw->pw_name);
|
|
} else
|
|
if (askpasswd)
|
|
printf(" Waiting for password\r\n");
|
|
else
|
|
printf(" Waiting for user name\r\n");
|
|
if (data != -1)
|
|
printf(" Data connection open\r\n");
|
|
else
|
|
if (pdata != -1) {
|
|
printf(" in Passive mode");
|
|
sin = &pasv_addr;
|
|
goto printaddr;
|
|
} else
|
|
if (usedefault == 0) {
|
|
printf(" PORT");
|
|
sin = &data_dest;
|
|
printaddr:
|
|
a = (u_char *) & sin->sin_addr;
|
|
p = (u_char *) & sin->sin_port;
|
|
#define UC(b) (((int) b) & 0xff)
|
|
printf(" (%d,%d,%d,%d,%d,%d)\r\n", UC(a[0]),
|
|
UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
|
|
#undef UC
|
|
} else
|
|
printf(" No data connection\r\n");
|
|
reply(211, "End of status");
|
|
}
|
|
|
|
VOIDRET opiefatal FUNCTION((s), char *s)
|
|
{
|
|
reply(451, "Error in server: %s\n", s);
|
|
reply(221, "Closing connection due to server error.");
|
|
dologout(0);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static VOIDRET ack FUNCTION((s), char *s)
|
|
{
|
|
reply(250, "%s command successful.", s);
|
|
}
|
|
|
|
VOIDRET nack FUNCTION((s), char *s)
|
|
{
|
|
reply(502, "%s command not implemented.", s);
|
|
}
|
|
|
|
VOIDRET yyerror FUNCTION((s), char *s)
|
|
{
|
|
char *cp;
|
|
|
|
if (cp = strchr(cbuf, '\n'))
|
|
*cp = '\0';
|
|
reply(500, "'%s': command not understood.", cbuf);
|
|
}
|
|
|
|
VOIDRET delete FUNCTION((name), char *name)
|
|
{
|
|
struct stat st;
|
|
|
|
if (stat(name, &st) < 0) {
|
|
perror_reply(550, name);
|
|
return;
|
|
}
|
|
if ((st.st_mode & S_IFMT) == S_IFDIR) {
|
|
if (rmdir(name) < 0) {
|
|
perror_reply(550, name);
|
|
return;
|
|
}
|
|
goto done;
|
|
}
|
|
if (unlink(name) < 0) {
|
|
perror_reply(550, name);
|
|
return;
|
|
}
|
|
done:
|
|
ack("DELE");
|
|
}
|
|
|
|
VOIDRET cwd FUNCTION((path), char *path)
|
|
{
|
|
if (chdir(path) < 0)
|
|
perror_reply(550, path);
|
|
else
|
|
ack("CWD");
|
|
}
|
|
|
|
VOIDRET makedir FUNCTION((name), char *name)
|
|
{
|
|
if (mkdir(name, 0777) < 0)
|
|
perror_reply(550, name);
|
|
else
|
|
reply(257, "MKD command successful.");
|
|
}
|
|
|
|
VOIDRET removedir FUNCTION((name), char *name)
|
|
{
|
|
if (rmdir(name) < 0)
|
|
perror_reply(550, name);
|
|
else
|
|
ack("RMD");
|
|
}
|
|
|
|
VOIDRET pwd FUNCTION_NOARGS
|
|
{
|
|
char path[MAXPATHLEN + 1];
|
|
|
|
if (getcwd(path, MAXPATHLEN) == (char *) NULL)
|
|
reply(550, "%s.", path);
|
|
else
|
|
reply(257, "\"%s\" is current directory.", path);
|
|
}
|
|
|
|
char *renamefrom FUNCTION((name), char *name)
|
|
{
|
|
struct stat st;
|
|
|
|
if (stat(name, &st) < 0) {
|
|
perror_reply(550, name);
|
|
return ((char *) 0);
|
|
}
|
|
reply(350, "File exists, ready for destination name");
|
|
return (name);
|
|
}
|
|
|
|
VOIDRET renamecmd FUNCTION((from, to), char *from AND char *to)
|
|
{
|
|
if (rename(from, to) < 0)
|
|
perror_reply(550, "rename");
|
|
else
|
|
ack("RNTO");
|
|
}
|
|
|
|
static VOIDRET dolog FUNCTION((sin), struct sockaddr_in *sin)
|
|
{
|
|
struct hostent *hp = gethostbyaddr((char *) &sin->sin_addr,
|
|
sizeof(struct in_addr), AF_INET);
|
|
time_t t, time();
|
|
|
|
if (hp)
|
|
strncpy(remotehost, hp->h_name, sizeof(remotehost));
|
|
else
|
|
strncpy(remotehost, inet_ntoa(sin->sin_addr), sizeof(remotehost));
|
|
remotehost[sizeof(remotehost) - 1] = '\0';
|
|
#if DOTITLE
|
|
snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
|
|
setproctitle("%s", proctitle);
|
|
#endif /* DOTITLE */
|
|
|
|
t = time((time_t *) 0);
|
|
syslog(LOG_INFO, "connection from %s at %s",
|
|
remotehost, ctime(&t));
|
|
}
|
|
|
|
/*
|
|
* Record logout in wtmp file
|
|
* and exit with supplied status.
|
|
*/
|
|
VOIDRET dologout FUNCTION((status), int status)
|
|
{
|
|
disable_signalling();
|
|
if (logged_in) {
|
|
if (seteuid((uid_t) 0))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
opielogwtmp(ttyline, "", "");
|
|
}
|
|
/* beware of flushing buffers after a SIGPIPE */
|
|
_exit(status);
|
|
}
|
|
|
|
static VOIDRET myoob FUNCTION((input), int input)
|
|
{
|
|
char *cp;
|
|
|
|
/* only process if transfer occurring */
|
|
if (!transflag)
|
|
return;
|
|
cp = tmpline;
|
|
if (getline(cp, 7, stdin) == NULL) {
|
|
reply(221, "You could at least say goodbye.");
|
|
dologout(0);
|
|
}
|
|
upper(cp);
|
|
if (strcmp(cp, "ABOR\r\n") == 0) {
|
|
tmpline[0] = '\0';
|
|
reply(426, "Transfer aborted. Data connection closed.");
|
|
reply(226, "Abort successful");
|
|
longjmp(urgcatch, 1);
|
|
}
|
|
if (strcmp(cp, "STAT\r\n") == 0) {
|
|
if (file_size != (off_t) - 1)
|
|
reply(213, "Status: %lu of %lu bytes transferred",
|
|
byte_count, file_size);
|
|
else
|
|
reply(213, "Status: %lu bytes transferred", byte_count);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Note: a response of 425 is not mentioned as a possible response to
|
|
* the PASV command in RFC959. However, it has been blessed as
|
|
* a legitimate response by Jon Postel in a telephone conversation
|
|
* with Rick Adams on 25 Jan 89.
|
|
*/
|
|
VOIDRET passive FUNCTION_NOARGS
|
|
{
|
|
int len;
|
|
register char *p, *a;
|
|
|
|
pdata = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (pdata < 0) {
|
|
perror_reply(425, "Can't open passive connection");
|
|
return;
|
|
}
|
|
pasv_addr = ctrl_addr;
|
|
pasv_addr.sin_port = 0;
|
|
if (seteuid((uid_t) 0))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
if (bind(pdata, (struct sockaddr *) & pasv_addr, sizeof(pasv_addr)) < 0) {
|
|
seteuid((uid_t) pw->pw_uid);
|
|
goto pasv_error;
|
|
}
|
|
if (seteuid((uid_t) pw->pw_uid))
|
|
syslog(LOG_ERR, "Can't set euid");
|
|
len = sizeof(pasv_addr);
|
|
if (getsockname(pdata, (struct sockaddr *) & pasv_addr, &len) < 0)
|
|
goto pasv_error;
|
|
if (listen(pdata, 1) < 0)
|
|
goto pasv_error;
|
|
a = (char *) &pasv_addr.sin_addr;
|
|
p = (char *) &pasv_addr.sin_port;
|
|
|
|
#define UC(b) (((int) b) & 0xff)
|
|
|
|
reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]),
|
|
UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1]));
|
|
return;
|
|
|
|
pasv_error:
|
|
close(pdata);
|
|
pdata = -1;
|
|
perror_reply(425, "Can't open passive connection");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Generate unique name for file with basename "local".
|
|
* The file named "local" is already known to exist.
|
|
* Generates failure reply on error.
|
|
*/
|
|
static char *gunique FUNCTION((local), char *local)
|
|
{
|
|
static char new[MAXPATHLEN+1];
|
|
struct stat st;
|
|
char *cp = strrchr(local, '/');
|
|
int count = 0;
|
|
|
|
if (cp)
|
|
*cp = '\0';
|
|
if (stat(cp ? local : ".", &st) < 0) {
|
|
perror_reply(553, cp ? local : ".");
|
|
return ((char *) 0);
|
|
}
|
|
if (cp)
|
|
*cp = '/';
|
|
strcpy(new, local);
|
|
cp = new + strlen(new);
|
|
*cp++ = '.';
|
|
for (count = 1; count < 100; count++) {
|
|
snprintf(cp, sizeof(new) - (cp - new), "%d", count);
|
|
if (stat(new, &st) < 0)
|
|
return (new);
|
|
}
|
|
reply(452, "Unique file name cannot be created.");
|
|
return ((char *) 0);
|
|
}
|
|
|
|
/*
|
|
* Format and send reply containing system error number.
|
|
*/
|
|
VOIDRET perror_reply FUNCTION((code, string), int code AND char *string)
|
|
{
|
|
reply(code, "%s: %s.", string, strerror(errno));
|
|
}
|
|
|
|
static char *onefile[] =
|
|
{
|
|
"",
|
|
0
|
|
};
|
|
|
|
VOIDRET send_file_list FUNCTION((whichfiles), char *whichfiles)
|
|
{
|
|
struct stat st;
|
|
DIR *dirp = NULL;
|
|
struct dirent *dir;
|
|
FILE *dout = NULL;
|
|
register char **dirlist, *dirname;
|
|
int simple = 0;
|
|
|
|
if (strpbrk(whichfiles, "~{[*?") != NULL) {
|
|
extern char **ftpglob(), *globerr;
|
|
|
|
globerr = NULL;
|
|
dirlist = ftpglob(whichfiles);
|
|
if (globerr != NULL) {
|
|
reply(550, globerr);
|
|
return;
|
|
} else
|
|
if (dirlist == NULL) {
|
|
errno = ENOENT;
|
|
perror_reply(550, whichfiles);
|
|
return;
|
|
}
|
|
} else {
|
|
onefile[0] = whichfiles;
|
|
dirlist = onefile;
|
|
simple = 1;
|
|
}
|
|
|
|
if (setjmp(urgcatch)) {
|
|
transflag = 0;
|
|
return;
|
|
}
|
|
while (dirname = *dirlist++) {
|
|
if (stat(dirname, &st) < 0) {
|
|
/* If user typed "ls -l", etc, and the client used NLST, do what the
|
|
user meant. */
|
|
if (dirname[0] == '-' && *dirlist == NULL &&
|
|
transflag == 0) {
|
|
retrieve("/bin/ls %s", dirname);
|
|
return;
|
|
}
|
|
perror_reply(550, whichfiles);
|
|
if (dout != NULL) {
|
|
fclose(dout);
|
|
transflag = 0;
|
|
data = -1;
|
|
pdata = -1;
|
|
}
|
|
return;
|
|
}
|
|
if ((st.st_mode & S_IFMT) == S_IFREG) {
|
|
if (dout == NULL) {
|
|
dout = dataconn("file list", (off_t) - 1, "w");
|
|
if (dout == NULL)
|
|
return;
|
|
transflag++;
|
|
}
|
|
fprintf(dout, "%s%s\n", dirname,
|
|
type == TYPE_A ? "\r" : "");
|
|
byte_count += strlen(dirname) + 1;
|
|
continue;
|
|
} else
|
|
if ((st.st_mode & S_IFMT) != S_IFDIR)
|
|
continue;
|
|
|
|
if ((dirp = opendir(dirname)) == NULL)
|
|
continue;
|
|
|
|
while ((dir = readdir(dirp)) != NULL) {
|
|
char nbuf[MAXPATHLEN+1];
|
|
|
|
if (dir->d_name[0] == '.' && (strlen(dir->d_name) == 1))
|
|
continue;
|
|
if (dir->d_name[0] == '.' && dir->d_name[1] == '.' &&
|
|
(strlen(dir->d_name) == 2))
|
|
continue;
|
|
|
|
snprintf(nbuf, sizeof(nbuf), "%s/%s", dirname, dir->d_name);
|
|
|
|
/* We have to do a stat to insure it's not a directory or special file. */
|
|
if (simple || (stat(nbuf, &st) == 0 &&
|
|
(st.st_mode & S_IFMT) == S_IFREG)) {
|
|
if (dout == NULL) {
|
|
dout = dataconn("file list", (off_t) - 1, "w");
|
|
if (dout == NULL)
|
|
return;
|
|
transflag++;
|
|
}
|
|
if (nbuf[0] == '.' && nbuf[1] == '/')
|
|
fprintf(dout, "%s%s\n", &nbuf[2],
|
|
type == TYPE_A ? "\r" : "");
|
|
else
|
|
fprintf(dout, "%s%s\n", nbuf,
|
|
type == TYPE_A ? "\r" : "");
|
|
byte_count += strlen(nbuf) + 1;
|
|
}
|
|
}
|
|
closedir(dirp);
|
|
}
|
|
|
|
if (dout == NULL)
|
|
reply(550, "No files found.");
|
|
else
|
|
if (ferror(dout) != 0)
|
|
perror_reply(550, "Data connection");
|
|
else
|
|
reply(226, "Transfer complete.");
|
|
|
|
transflag = 0;
|
|
if (dout != NULL)
|
|
fclose(dout);
|
|
data = -1;
|
|
pdata = -1;
|
|
}
|
|
|
|
#if DOTITLE
|
|
/*
|
|
* clobber argv so ps will show what we're doing.
|
|
* (stolen from sendmail)
|
|
* warning, since this is usually started from inetd.conf, it
|
|
* often doesn't have much of an environment or arglist to overwrite.
|
|
*/
|
|
VOIDRET setproctitle FUNCTION((fmt, a, b, c), char *fmt AND int a AND int b AND int c)
|
|
{
|
|
register char *p, *bp, ch;
|
|
register int i;
|
|
char buf[BUFSIZ];
|
|
|
|
snprintf(buf, sizeof(buf), fmt, a, b, c);
|
|
|
|
/* make ps print our process name */
|
|
p = Argv[0];
|
|
*p++ = '-';
|
|
|
|
i = strlen(buf);
|
|
if (i > LastArgv - p - 2) {
|
|
i = LastArgv - p - 2;
|
|
buf[i] = '\0';
|
|
}
|
|
bp = buf;
|
|
while (ch = *bp++)
|
|
if (ch != '\n' && ch != '\r')
|
|
*p++ = ch;
|
|
while (p < LastArgv)
|
|
*p++ = ' ';
|
|
}
|
|
#endif /* DOTITLE */
|
|
|
|
VOIDRET catchexit FUNCTION_NOARGS
|
|
{
|
|
closelog();
|
|
}
|
|
|
|
int main FUNCTION((argc, argv, envp), int argc AND char *argv[] AND char *envp[])
|
|
{
|
|
int addrlen, on = 1;
|
|
char *cp;
|
|
#ifdef IP_TOS
|
|
int tos;
|
|
#endif /* IP_TOS */
|
|
|
|
{
|
|
int i;
|
|
|
|
for (i = sysconf(_SC_OPEN_MAX); i > 2; i--)
|
|
close(i);
|
|
}
|
|
|
|
/* LOG_NDELAY sets up the logging connection immediately, necessary for
|
|
anonymous ftp's that chroot and can't do it later. */
|
|
openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_DAEMON);
|
|
atexit(catchexit);
|
|
addrlen = sizeof(his_addr);
|
|
if (getpeername(0, (struct sockaddr *) & his_addr, &addrlen) < 0) {
|
|
syslog(LOG_ERR, "getpeername (%s): %m", argv[0]);
|
|
exit(1);
|
|
}
|
|
addrlen = sizeof(ctrl_addr);
|
|
if (getsockname(0, (struct sockaddr *) & ctrl_addr, &addrlen) < 0) {
|
|
syslog(LOG_ERR, "getsockname (%s): %m", argv[0]);
|
|
exit(1);
|
|
}
|
|
#ifdef IP_TOS
|
|
tos = IPTOS_LOWDELAY;
|
|
if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *) &tos, sizeof(int)) < 0)
|
|
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
|
|
#endif
|
|
data_source.sin_port = htons(ntohs(ctrl_addr.sin_port) - 1);
|
|
debug = 0;
|
|
#if DOTITLE
|
|
/* Save start and extent of argv for setproctitle. */
|
|
Argv = argv;
|
|
while (*envp)
|
|
envp++;
|
|
LastArgv = envp[-1] + strlen(envp[-1]);
|
|
#endif /* DOTITLE */
|
|
|
|
argc--, argv++;
|
|
while (argc > 0 && *argv[0] == '-') {
|
|
for (cp = &argv[0][1]; *cp; cp++)
|
|
switch (*cp) {
|
|
|
|
case 'v':
|
|
debug = 1;
|
|
break;
|
|
|
|
case 'd':
|
|
debug = 1;
|
|
break;
|
|
|
|
case 'l':
|
|
break;
|
|
|
|
case 't':
|
|
timeout = atoi(++cp);
|
|
if (maxtimeout < timeout)
|
|
maxtimeout = timeout;
|
|
goto nextopt;
|
|
|
|
case 'T':
|
|
maxtimeout = atoi(++cp);
|
|
if (timeout > maxtimeout)
|
|
timeout = maxtimeout;
|
|
goto nextopt;
|
|
|
|
case 'u':
|
|
{
|
|
int val = 0;
|
|
|
|
while (*++cp && *cp >= '0' && *cp <= '9')
|
|
val = val * 8 + *cp - '0';
|
|
if (*cp)
|
|
fprintf(stderr, "ftpd: Bad value for -u\n");
|
|
else
|
|
defumask = val;
|
|
goto nextopt;
|
|
}
|
|
|
|
default:
|
|
fprintf(stderr, "ftpd: Unknown flag -%c ignored.\n",
|
|
*cp);
|
|
break;
|
|
}
|
|
nextopt:
|
|
argc--, argv++;
|
|
}
|
|
freopen(_PATH_DEVNULL, "w", stderr);
|
|
signal(SIGCHLD, SIG_IGN);
|
|
enable_signalling();
|
|
|
|
/* Try to handle urgent data inline */
|
|
#ifdef SO_OOBINLINE
|
|
if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *) &on, sizeof(on)) < 0)
|
|
syslog(LOG_ERR, "setsockopt: %m");
|
|
#endif
|
|
|
|
#ifdef F_SETOWN
|
|
if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
|
|
syslog(LOG_ERR, "fcntl F_SETOWN: %m");
|
|
#endif
|
|
dolog(&his_addr);
|
|
/* Set up default state */
|
|
data = -1;
|
|
type = TYPE_A;
|
|
form = FORM_N;
|
|
stru = STRU_F;
|
|
mode = MODE_S;
|
|
tmpline[0] = '\0';
|
|
af_pwok = opieaccessfile(remotehost);
|
|
|
|
{
|
|
FILE *fd;
|
|
char line[128];
|
|
|
|
/* If logins are disabled, print out the message. */
|
|
if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) {
|
|
while (fgets(line, sizeof(line), fd) != NULL) {
|
|
if ((cp = strchr(line, '\n')) != NULL)
|
|
*cp = '\0';
|
|
lreply(530, "%s", line);
|
|
}
|
|
(void) fflush(stdout);
|
|
(void) fclose(fd);
|
|
reply(530, "System not available.");
|
|
exit(0);
|
|
}
|
|
if ((fd = fopen(_PATH_FTPWELCOME, "r")) != NULL) {
|
|
while (fgets(line, sizeof(line), fd) != NULL) {
|
|
if ((cp = strchr(line, '\n')) != NULL)
|
|
*cp = '\0';
|
|
lreply(220, "%s", line);
|
|
}
|
|
(void) fflush(stdout);
|
|
(void) fclose(fd);
|
|
/* reply(220,) must follow */
|
|
}
|
|
};
|
|
|
|
reply(220, "FTP server ready.");
|
|
|
|
setjmp(errcatch);
|
|
for (;;)
|
|
yyparse();
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|