2721 lines
64 KiB
C
2721 lines
64 KiB
C
/* $NetBSD: ftpd.c,v 1.86 2000/02/14 03:26:06 aidan Exp $ */
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/*
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* Copyright (c) 1997-2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Luke Mewburn.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994
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* The Regents of the University of California. 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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/*
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* Copyright (C) 1997 and 1998 WIDE Project.
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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. Neither the name of the project 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 PROJECT 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 PROJECT 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 <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT(
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"@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)ftpd.c 8.5 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: ftpd.c,v 1.86 2000/02/14 03:26:06 aidan Exp $");
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#endif
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#endif /* not lint */
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/*
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* FTP server.
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*/
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#include <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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#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 <ctype.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <glob.h>
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#include <grp.h>
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#include <limits.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <unistd.h>
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#include <util.h>
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#include <utmp.h>
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#ifdef SKEY
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#include <skey.h>
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#endif
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#ifdef KERBEROS5
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#include <com_err.h>
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#include <krb5/krb5.h>
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#endif
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#define GLOBAL
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#include "extern.h"
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#include "pathnames.h"
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#include "version.h"
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#if __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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const char version[] = FTPD_VERSION;
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union sockunion ctrl_addr;
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union sockunion data_source;
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union sockunion data_dest;
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union sockunion his_addr;
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union sockunion pasv_addr;
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int data;
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jmp_buf errcatch, urgcatch;
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int logged_in;
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int connections = 1;
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struct passwd *pw;
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int debug;
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int sflag;
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int logging;
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int type;
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int form;
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int stru; /* avoid C keyword */
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int mode;
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int doutmp = 0; /* update utmp file */
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int usedefault = 1; /* for data transfers */
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int pdata = -1; /* for passive mode */
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int mapped = 0; /* IPv4 connection on AF_INET6 socket */
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sig_atomic_t transflag;
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off_t file_size;
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off_t byte_count;
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char tmpline[7];
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char hostname[MAXHOSTNAMELEN+1];
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char remotehost[MAXHOSTNAMELEN+1];
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static char ttyline[20];
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char *tty = ttyline; /* for klogin */
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static struct utmp utmp; /* for utmp */
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off_t total_data_in; /* total file data bytes received */
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off_t total_data_out; /* total file data bytes sent data */
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off_t total_data; /* total file data bytes transferred data */
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off_t total_files_in; /* total number of data files received */
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off_t total_files_out; /* total number of data files sent */
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off_t total_files; /* total number of data files transferred */
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off_t total_bytes_in; /* total bytes received */
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off_t total_bytes_out; /* total bytes sent */
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off_t total_bytes; /* total bytes transferred */
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off_t total_xfers_in; /* total number of xfers incoming */
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off_t total_xfers_out; /* total number of xfers outgoing */
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off_t total_xfers; /* total number of xfers */
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static char *anondir = NULL;
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static char confdir[MAXPATHLEN];
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#if defined(KERBEROS) || defined(KERBEROS5)
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int notickets = 1;
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char *krbtkfile_env = NULL;
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#endif
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int epsvall = 0;
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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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int swaitmax = SWAITMAX;
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int swaitint = SWAITINT;
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#ifdef HASSETPROCTITLE
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char proctitle[BUFSIZ]; /* initial part of title */
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#endif /* HASSETPROCTITLE */
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#define CURCLASSTYPE curclass.type == CLASS_GUEST ? "GUEST" : \
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curclass.type == CLASS_CHROOT ? "CHROOT" : \
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curclass.type == CLASS_REAL ? "REAL" : \
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"<unknown>"
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static void ack __P((const char *));
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static int bind_pasv_addr __P((void));
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static int checkuser __P((const char *, const char *, int, int, char **));
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static int checkaccess __P((const char *));
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static FILE *dataconn __P((const char *, off_t, const char *));
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static void dolog __P((struct sockaddr *));
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static void end_login __P((void));
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static FILE *getdatasock __P((const char *));
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static char *gunique __P((const char *));
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static void lostconn __P((int));
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static void myoob __P((int));
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static int receive_data __P((FILE *, FILE *));
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static void replydirname __P((const char *, const char *));
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static int send_data __P((FILE *, FILE *, off_t, int));
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static struct passwd *
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sgetpwnam __P((const char *));
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int main __P((int, char *[]));
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#if defined(KERBEROS) || defined(KERBEROS5)
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int klogin __P((struct passwd *, char *, char *, char *));
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void kdestroy __P((void));
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#endif
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int addrlen, ch, on = 1, tos, keepalive;
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#ifdef KERBEROS5
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krb5_error_code kerror;
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#endif
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debug = 0;
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logging = 0;
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sflag = 0;
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(void)strcpy(confdir, _DEFAULT_CONFDIR);
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hostname[0] = '\0';
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while ((ch = getopt(argc, argv, "a:c:C:dh:lst:T:u:Uv")) != -1) {
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switch (ch) {
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case 'a':
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anondir = optarg;
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break;
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case 'c':
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(void)strlcpy(confdir, optarg, sizeof(confdir));
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break;
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case 'C':
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pw = sgetpwnam(optarg);
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exit(checkaccess(optarg) ? 0 : 1);
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/* NOTREACHED */
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case 'd':
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case 'v': /* deprecated */
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debug = 1;
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break;
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case 'h':
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strlcpy(hostname, optarg, sizeof(hostname));
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break;
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case 'l':
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logging++; /* > 1 == extra logging */
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break;
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case 's':
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sflag = 1;
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break;
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case 't':
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case 'T':
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case 'u':
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warnx("-%c has been deprecated in favour of ftpd.conf",
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ch);
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break;
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case 'U':
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doutmp = 1;
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break;
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default:
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if (optopt == 'a' || optopt == 'C')
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exit(1);
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warnx("unknown flag -%c ignored", optopt);
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break;
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}
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}
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/*
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* LOG_NDELAY sets up the logging connection immediately,
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* necessary for anonymous ftp's that chroot and can't do it later.
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*/
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openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP);
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addrlen = sizeof(his_addr); /* xxx */
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if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) {
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syslog(LOG_ERR, "getpeername (%s): %m",argv[0]);
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exit(1);
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}
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addrlen = sizeof(ctrl_addr);
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if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) {
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syslog(LOG_ERR, "getsockname (%s): %m",argv[0]);
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exit(1);
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}
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if (his_addr.su_family == AF_INET6
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&& IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr)) {
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#if 1
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/*
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* IPv4 control connection arrived to AF_INET6 socket.
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* I hate to do this, but this is the easiest solution.
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*/
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union sockunion tmp_addr;
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const int off = sizeof(struct in6_addr) - sizeof(struct in_addr);
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tmp_addr = his_addr;
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memset(&his_addr, 0, sizeof(his_addr));
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his_addr.su_sin.sin_family = AF_INET;
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his_addr.su_sin.sin_len = sizeof(his_addr.su_sin);
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memcpy(&his_addr.su_sin.sin_addr,
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&tmp_addr.su_sin6.sin6_addr.s6_addr[off],
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sizeof(his_addr.su_sin.sin_addr));
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his_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port;
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tmp_addr = ctrl_addr;
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memset(&ctrl_addr, 0, sizeof(ctrl_addr));
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ctrl_addr.su_sin.sin_family = AF_INET;
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ctrl_addr.su_sin.sin_len = sizeof(ctrl_addr.su_sin);
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memcpy(&ctrl_addr.su_sin.sin_addr,
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&tmp_addr.su_sin6.sin6_addr.s6_addr[off],
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sizeof(ctrl_addr.su_sin.sin_addr));
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ctrl_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port;
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#else
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while (fgets(line, sizeof(line), fd) != NULL) {
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if ((cp = strchr(line, '\n')) != NULL)
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*cp = '\0';
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lreply(530, "%s", line);
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}
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(void) fflush(stdout);
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(void) fclose(fd);
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reply(530,
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"Connection from IPv4 mapped address is not supported.");
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exit(0);
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#endif
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mapped = 1;
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} else
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mapped = 0;
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#ifdef IP_TOS
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if (!mapped && his_addr.su_family == AF_INET) {
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tos = IPTOS_LOWDELAY;
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if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos,
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sizeof(int)) < 0)
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syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
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}
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#endif
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data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1);
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/* if the hostname hasn't been given, attempt to determine it */
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if (hostname[0] == '\0') {
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if (getnameinfo((struct sockaddr *)&ctrl_addr, ctrl_addr.su_len,
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hostname, sizeof(hostname), NULL, 0, 0) != 0)
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(void)gethostname(hostname, sizeof(hostname));
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hostname[sizeof(hostname) - 1] = '\0';
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}
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/* set this here so klogin can use it... */
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(void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid());
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(void) freopen(_PATH_DEVNULL, "w", stderr);
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(void) signal(SIGPIPE, lostconn);
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(void) signal(SIGCHLD, SIG_IGN);
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if (signal(SIGURG, myoob) == SIG_ERR)
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syslog(LOG_ERR, "signal: %m");
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|
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/* Try to handle urgent data inline */
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#ifdef SO_OOBINLINE
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if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0)
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syslog(LOG_ERR, "setsockopt: %m");
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#endif
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/* Set keepalives on the socket to detect dropped connections. */
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#ifdef SO_KEEPALIVE
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keepalive = 1;
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if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive,
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sizeof(int)) < 0)
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syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
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#endif
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#ifdef F_SETOWN
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if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1)
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syslog(LOG_ERR, "fcntl F_SETOWN: %m");
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#endif
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dolog((struct sockaddr *)&his_addr);
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/*
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* Set up default state
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*/
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data = -1;
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type = TYPE_A;
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form = FORM_N;
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stru = STRU_F;
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mode = MODE_S;
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tmpline[0] = '\0';
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hasyyerrored = 0;
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#ifdef KERBEROS5
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kerror = krb5_init_context(&kcontext);
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if (kerror) {
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syslog(LOG_NOTICE, "%s when initializing Kerberos context",
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error_message(kerror));
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exit(0);
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}
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#endif /* KERBEROS5 */
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|
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init_curclass();
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curclass.timeout = 300; /* 5 minutes, as per login(1) */
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curclass.type = CLASS_REAL;
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|
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/* If logins are disabled, print out the message. */
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if (format_file(_PATH_NOLOGIN, 530)) {
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reply(530, "System not available.");
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exit(0);
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}
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(void)format_file(conffilename(_PATH_FTPWELCOME), 220);
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/* reply(220,) must follow */
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reply(220, "%s FTP server (%s) ready.", hostname, version);
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|
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(void) setjmp(errcatch);
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for (;;)
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(void) yyparse();
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/* NOTREACHED */
|
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}
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|
|
static void
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lostconn(signo)
|
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int signo;
|
|
{
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|
|
if (debug)
|
|
syslog(LOG_DEBUG, "lost connection");
|
|
dologout(1);
|
|
}
|
|
|
|
/*
|
|
* Save the result of a getpwnam. Used for USER command, since
|
|
* the data returned must not be clobbered by any other command
|
|
* (e.g., globbing).
|
|
*/
|
|
static struct passwd *
|
|
sgetpwnam(name)
|
|
const char *name;
|
|
{
|
|
static struct passwd save;
|
|
struct passwd *p;
|
|
|
|
if ((p = getpwnam(name)) == NULL)
|
|
return (p);
|
|
if (save.pw_name) {
|
|
free((char *)save.pw_name);
|
|
memset(save.pw_passwd, 0, strlen(save.pw_passwd));
|
|
free((char *)save.pw_passwd);
|
|
free((char *)save.pw_gecos);
|
|
free((char *)save.pw_dir);
|
|
free((char *)save.pw_shell);
|
|
}
|
|
save = *p;
|
|
save.pw_name = xstrdup(p->pw_name);
|
|
save.pw_passwd = xstrdup(p->pw_passwd);
|
|
save.pw_gecos = xstrdup(p->pw_gecos);
|
|
save.pw_dir = xstrdup(p->pw_dir);
|
|
save.pw_shell = xstrdup(p->pw_shell);
|
|
return (&save);
|
|
}
|
|
|
|
static int login_attempts; /* number of failed login attempts */
|
|
static int askpasswd; /* had user command, ask for passwd */
|
|
static char curname[10]; /* current USER name */
|
|
|
|
/*
|
|
* USER command.
|
|
* Sets global passwd pointer pw if named account exists and is acceptable;
|
|
* sets askpasswd if a PASS command is expected. If logged in previously,
|
|
* need to reset state. If name is "ftp" or "anonymous", the name is not in
|
|
* _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return.
|
|
* If account doesn't exist, ask for passwd anyway. Otherwise, check user
|
|
* requesting login privileges. Disallow anyone who does not have a standard
|
|
* shell as returned by getusershell(). Disallow anyone mentioned in the file
|
|
* _PATH_FTPUSERS to allow people such as root and uucp to be avoided.
|
|
*/
|
|
void
|
|
user(name)
|
|
const char *name;
|
|
{
|
|
if (logged_in) {
|
|
switch (curclass.type) {
|
|
case CLASS_GUEST:
|
|
reply(530, "Can't change user from guest login.");
|
|
return;
|
|
case CLASS_CHROOT:
|
|
reply(530, "Can't change user from chroot user.");
|
|
return;
|
|
case CLASS_REAL:
|
|
end_login();
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
#if defined(KERBEROS) || defined(KERBEROS5)
|
|
kdestroy();
|
|
#endif
|
|
|
|
curclass.type = CLASS_REAL;
|
|
if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) {
|
|
/* need `pw' setup for checkaccess() and checkuser () */
|
|
if ((pw = sgetpwnam("ftp")) == NULL)
|
|
reply(530, "User %s unknown.", name);
|
|
else if (! checkaccess("ftp") || ! checkaccess("anonymous"))
|
|
reply(530, "User %s access denied.", name);
|
|
else {
|
|
curclass.type = CLASS_GUEST;
|
|
askpasswd = 1;
|
|
reply(331,
|
|
"Guest login ok, type your name as password.");
|
|
}
|
|
if (!askpasswd && logging)
|
|
syslog(LOG_NOTICE,
|
|
"ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost);
|
|
return;
|
|
}
|
|
|
|
pw = sgetpwnam(name);
|
|
if (logging)
|
|
strlcpy(curname, name, sizeof(curname));
|
|
|
|
#ifdef SKEY
|
|
if (skey_haskey(name) == 0) {
|
|
char *myskey;
|
|
|
|
myskey = skey_keyinfo(name);
|
|
reply(331, "Password [%s] required for %s.",
|
|
myskey ? myskey : "error getting challenge", name);
|
|
} else
|
|
#endif
|
|
reply(331, "Password required for %s.", name);
|
|
|
|
askpasswd = 1;
|
|
/*
|
|
* Delay before reading passwd after first failed
|
|
* attempt to slow down passwd-guessing programs.
|
|
*/
|
|
if (login_attempts)
|
|
sleep((unsigned) login_attempts);
|
|
}
|
|
|
|
/*
|
|
* Determine whether something is to happen (allow access, chroot)
|
|
* for a user. Each line is a shell-style glob followed by
|
|
* `yes' or `no'.
|
|
*
|
|
* For backward compatability, `allow' and `deny' are synonymns
|
|
* for `yes' and `no', respectively.
|
|
*
|
|
* Each glob is matched against the username in turn, and the first
|
|
* match found is used. If no match is found, the result is the
|
|
* argument `def'. If a match is found but without and explicit
|
|
* `yes'/`no', the result is the opposite of def.
|
|
*
|
|
* If the file doesn't exist at all, the result is the argument
|
|
* `nofile'
|
|
*
|
|
* Any line starting with `#' is considered a comment and ignored.
|
|
*
|
|
* Returns 0 if the user is denied, or 1 if they are allowed.
|
|
*
|
|
* NOTE: needs struct passwd *pw setup before use.
|
|
*/
|
|
int
|
|
checkuser(fname, name, def, nofile, retclass)
|
|
const char *fname, *name;
|
|
int def, nofile;
|
|
char **retclass;
|
|
{
|
|
FILE *fd;
|
|
int retval;
|
|
char *glob, *perm, *class, *buf, *p;
|
|
size_t len, line;
|
|
|
|
retval = def;
|
|
if (retclass != NULL)
|
|
*retclass = NULL;
|
|
if ((fd = fopen(conffilename(fname), "r")) == NULL)
|
|
return nofile;
|
|
|
|
line = 0;
|
|
for (;
|
|
(buf = fparseln(fd, &len, &line, NULL, FPARSELN_UNESCCOMM |
|
|
FPARSELN_UNESCCONT | FPARSELN_UNESCESC)) != NULL;
|
|
free(buf), buf = NULL) {
|
|
glob = perm = class = NULL;
|
|
p = buf;
|
|
if (len < 1)
|
|
continue;
|
|
if (p[len - 1] == '\n')
|
|
p[--len] = '\0';
|
|
if (EMPTYSTR(p))
|
|
continue;
|
|
|
|
NEXTWORD(p, glob);
|
|
NEXTWORD(p, perm);
|
|
NEXTWORD(p, class);
|
|
if (EMPTYSTR(glob))
|
|
continue;
|
|
if (!EMPTYSTR(class)) {
|
|
if (strcasecmp(class, "all") == 0 ||
|
|
strcasecmp(class, "none") == 0) {
|
|
syslog(LOG_WARNING,
|
|
"%s line %d: illegal user-defined class `%s' - skipping entry",
|
|
fname, (int)line, class);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* have a host specifier */
|
|
if ((p = strchr(glob, '@')) != NULL) {
|
|
u_int32_t net, mask, addr;
|
|
int bits;
|
|
|
|
*p++ = '\0';
|
|
/* check against network or CIDR */
|
|
if (isdigit(*p) &&
|
|
(bits = inet_net_pton(AF_INET, p,
|
|
&net, sizeof(net))) != -1) {
|
|
net = ntohl(net);
|
|
mask = 0xffffffffU << (32 - bits);
|
|
addr = ntohl(his_addr.su_sin.sin_addr.s_addr);
|
|
if ((addr & mask) != net)
|
|
continue;
|
|
|
|
/* check against hostname glob */
|
|
} else if (fnmatch(p, remotehost, 0) != 0)
|
|
continue;
|
|
}
|
|
|
|
/* have a group specifier */
|
|
if ((p = strchr(glob, ':')) != NULL) {
|
|
gid_t *groups, *ng;
|
|
int gsize, i, found;
|
|
|
|
*p++ = '\0';
|
|
groups = NULL;
|
|
gsize = 16;
|
|
do {
|
|
ng = realloc(groups, gsize * sizeof(gid_t));
|
|
if (ng == NULL)
|
|
fatal(
|
|
"Local resource failure: realloc");
|
|
groups = ng;
|
|
} while (getgrouplist(pw->pw_name, pw->pw_gid,
|
|
groups, &gsize) == -1);
|
|
found = 0;
|
|
for (i = 0; i < gsize; i++) {
|
|
struct group *g;
|
|
|
|
if ((g = getgrgid(groups[i])) == NULL)
|
|
continue;
|
|
if (fnmatch(p, g->gr_name, 0) == 0) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
free(groups);
|
|
if (!found)
|
|
continue;
|
|
}
|
|
|
|
/* check against username glob */
|
|
if (fnmatch(glob, name, 0) != 0)
|
|
continue;
|
|
|
|
if (perm != NULL &&
|
|
((strcasecmp(perm, "allow") == 0) ||
|
|
(strcasecmp(perm, "yes") == 0)))
|
|
retval = 1;
|
|
else if (perm != NULL &&
|
|
((strcasecmp(perm, "deny") == 0) ||
|
|
(strcasecmp(perm, "no") == 0)))
|
|
retval = 0;
|
|
else
|
|
retval = !def;
|
|
if (!EMPTYSTR(class) && retclass != NULL)
|
|
*retclass = xstrdup(class);
|
|
free(buf);
|
|
break;
|
|
}
|
|
(void) fclose(fd);
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* Check if user is allowed by /etc/ftpusers
|
|
* returns 1 for yes, 0 for no
|
|
*
|
|
* NOTE: needs struct passwd *pw setup (for checkuser())
|
|
*/
|
|
int
|
|
checkaccess(name)
|
|
const char *name;
|
|
{
|
|
|
|
return (checkuser(_PATH_FTPUSERS, name, 1, 0, NULL));
|
|
}
|
|
|
|
/*
|
|
* Terminate login as previous user, if any, resetting state;
|
|
* used when USER command is given or login fails.
|
|
*/
|
|
static void
|
|
end_login()
|
|
{
|
|
|
|
(void) seteuid((uid_t)0);
|
|
if (logged_in) {
|
|
logwtmp(ttyline, "", "");
|
|
if (doutmp)
|
|
logout(utmp.ut_line);
|
|
}
|
|
pw = NULL;
|
|
logged_in = 0;
|
|
quietmessages = 0;
|
|
curclass.type = CLASS_REAL;
|
|
}
|
|
|
|
void
|
|
pass(passwd)
|
|
const char *passwd;
|
|
{
|
|
int rval;
|
|
const char *cp, *shell, *home;
|
|
char *class;
|
|
|
|
class = NULL;
|
|
if (logged_in || askpasswd == 0) {
|
|
reply(503, "Login with USER first.");
|
|
return;
|
|
}
|
|
askpasswd = 0;
|
|
if (curclass.type != CLASS_GUEST) {
|
|
/* "ftp" is only account allowed no password */
|
|
if (pw == NULL) {
|
|
rval = 1; /* failure below */
|
|
goto skip;
|
|
}
|
|
#if defined(KERBEROS) || defined(KERBEROS5)
|
|
if (klogin(pw, "", hostname, (char *)passwd) == 0) {
|
|
rval = 0;
|
|
goto skip;
|
|
}
|
|
#endif
|
|
#ifdef SKEY
|
|
if (skey_haskey(pw->pw_name) == 0) {
|
|
char *p;
|
|
int r;
|
|
|
|
p = xstrdup(passwd);
|
|
r = skey_passcheck(pw->pw_name, p);
|
|
free(p);
|
|
if (r != -1) {
|
|
rval = 0;
|
|
goto skip;
|
|
}
|
|
}
|
|
#endif
|
|
if (!sflag && *pw->pw_passwd != '\0' &&
|
|
!strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd)) {
|
|
rval = 0;
|
|
goto skip;
|
|
}
|
|
rval = 1;
|
|
|
|
skip:
|
|
if (pw != NULL && pw->pw_expire && time(NULL) >= pw->pw_expire)
|
|
rval = 2;
|
|
/*
|
|
* If rval > 0, the user failed the authentication check
|
|
* above. If rval == 0, either Kerberos or local authentication
|
|
* succeeded.
|
|
*/
|
|
if (rval) {
|
|
reply(530, rval == 2 ? "Password expired." :
|
|
"Login incorrect.");
|
|
if (logging) {
|
|
syslog(LOG_NOTICE,
|
|
"FTP LOGIN FAILED FROM %s", remotehost);
|
|
syslog(LOG_AUTHPRIV | LOG_NOTICE,
|
|
"FTP LOGIN FAILED FROM %s, %s",
|
|
remotehost, curname);
|
|
}
|
|
pw = NULL;
|
|
if (login_attempts++ >= 5) {
|
|
syslog(LOG_NOTICE,
|
|
"repeated login failures from %s",
|
|
remotehost);
|
|
exit(0);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* password was ok; see if anything else prevents login */
|
|
if (! checkuser(_PATH_FTPUSERS, pw->pw_name, 1, 0, &class)) {
|
|
reply(530, "User %s may not use FTP.", pw->pw_name);
|
|
if (logging)
|
|
syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s",
|
|
remotehost, pw->pw_name);
|
|
goto bad;
|
|
}
|
|
/* check for valid shell, if not guest user */
|
|
if ((shell = pw->pw_shell) == NULL || *shell == 0)
|
|
shell = _PATH_BSHELL;
|
|
while ((cp = getusershell()) != NULL)
|
|
if (strcmp(cp, shell) == 0)
|
|
break;
|
|
endusershell();
|
|
if (cp == NULL && curclass.type != CLASS_GUEST) {
|
|
reply(530, "User %s may not use FTP.", pw->pw_name);
|
|
if (logging)
|
|
syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s",
|
|
remotehost, pw->pw_name);
|
|
goto bad;
|
|
}
|
|
|
|
login_attempts = 0; /* this time successful */
|
|
if (setegid((gid_t)pw->pw_gid) < 0) {
|
|
reply(550, "Can't set gid.");
|
|
goto bad;
|
|
}
|
|
(void) initgroups(pw->pw_name, pw->pw_gid);
|
|
|
|
/* open wtmp before chroot */
|
|
logwtmp(ttyline, pw->pw_name, remotehost);
|
|
|
|
/* open utmp before chroot */
|
|
if (doutmp) {
|
|
memset((void *)&utmp, 0, sizeof(utmp));
|
|
(void)time(&utmp.ut_time);
|
|
(void)strncpy(utmp.ut_name, pw->pw_name, sizeof(utmp.ut_name));
|
|
(void)strncpy(utmp.ut_host, remotehost, sizeof(utmp.ut_host));
|
|
(void)strncpy(utmp.ut_line, ttyline, sizeof(utmp.ut_line));
|
|
login(&utmp);
|
|
}
|
|
|
|
logged_in = 1;
|
|
|
|
/* check user in /etc/ftpchroot */
|
|
if (checkuser(_PATH_FTPCHROOT, pw->pw_name, 0, 0, NULL)) {
|
|
if (curclass.type == CLASS_GUEST) {
|
|
syslog(LOG_NOTICE,
|
|
"Can't change guest user to chroot class; remove entry in %s",
|
|
_PATH_FTPCHROOT);
|
|
exit(1);
|
|
}
|
|
curclass.type = CLASS_CHROOT;
|
|
}
|
|
if (class == NULL) {
|
|
switch (curclass.type) {
|
|
case CLASS_GUEST:
|
|
class = xstrdup("guest");
|
|
break;
|
|
case CLASS_CHROOT:
|
|
class = xstrdup("chroot");
|
|
break;
|
|
case CLASS_REAL:
|
|
class = xstrdup("real");
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
/* parse ftpd.conf, setting up various parameters */
|
|
parse_conf(class);
|
|
count_users();
|
|
if (curclass.limit != -1 && connections > curclass.limit) {
|
|
if (! EMPTYSTR(curclass.limitfile))
|
|
(void)format_file(conffilename(curclass.limitfile),530);
|
|
reply(530,
|
|
"User %s access denied, connection limit of %d reached.",
|
|
pw->pw_name, curclass.limit);
|
|
syslog(LOG_NOTICE,
|
|
"Maximum connection limit of %d for class %s reached, login refused",
|
|
curclass.limit, curclass.classname);
|
|
goto bad;
|
|
}
|
|
|
|
home = "/";
|
|
switch (curclass.type) {
|
|
case CLASS_GUEST:
|
|
/*
|
|
* We MUST do a chdir() after the chroot. Otherwise
|
|
* the old current directory will be accessible as "."
|
|
* outside the new root!
|
|
*/
|
|
if (chroot(anondir ? anondir : pw->pw_dir) < 0 ||
|
|
chdir("/") < 0) {
|
|
reply(550, "Can't set guest privileges.");
|
|
goto bad;
|
|
}
|
|
break;
|
|
case CLASS_CHROOT:
|
|
if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) {
|
|
reply(550, "Can't change root.");
|
|
goto bad;
|
|
}
|
|
break;
|
|
case CLASS_REAL:
|
|
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=/");
|
|
} else
|
|
home = pw->pw_dir;
|
|
break;
|
|
}
|
|
if (seteuid((uid_t)pw->pw_uid) < 0) {
|
|
reply(550, "Can't set uid.");
|
|
goto bad;
|
|
}
|
|
setenv("HOME", home, 1);
|
|
|
|
if (curclass.type == CLASS_GUEST && passwd[0] == '-')
|
|
quietmessages = 1;
|
|
|
|
/*
|
|
* Display a login message, if it exists.
|
|
* N.B. reply(230,) must follow the message.
|
|
*/
|
|
(void)format_file(conffilename(curclass.motd), 230);
|
|
show_chdir_messages(230);
|
|
if (curclass.type == CLASS_GUEST) {
|
|
reply(230, "Guest login ok, access restrictions apply.");
|
|
#ifdef HASSETPROCTITLE
|
|
snprintf(proctitle, sizeof(proctitle),
|
|
"%s: anonymous/%.*s", remotehost,
|
|
(int) (sizeof(proctitle) - sizeof(remotehost) -
|
|
sizeof(": anonymous/")), passwd);
|
|
setproctitle(proctitle);
|
|
#endif /* HASSETPROCTITLE */
|
|
if (logging)
|
|
syslog(LOG_INFO,
|
|
"ANONYMOUS FTP LOGIN FROM %s, %s (class: %s, type: %s)",
|
|
remotehost, passwd,
|
|
curclass.classname, CURCLASSTYPE);
|
|
} else {
|
|
reply(230, "User %s logged in.", pw->pw_name);
|
|
#ifdef HASSETPROCTITLE
|
|
snprintf(proctitle, sizeof(proctitle),
|
|
"%s: %s", remotehost, pw->pw_name);
|
|
setproctitle(proctitle);
|
|
#endif /* HASSETPROCTITLE */
|
|
if (logging)
|
|
syslog(LOG_INFO,
|
|
"FTP LOGIN FROM %s as %s (class: %s, type: %s)",
|
|
remotehost, pw->pw_name,
|
|
curclass.classname, CURCLASSTYPE);
|
|
}
|
|
(void) umask(curclass.umask);
|
|
goto cleanuppass;
|
|
bad:
|
|
/* Forget all about it... */
|
|
end_login();
|
|
cleanuppass:
|
|
if (class)
|
|
free(class);
|
|
}
|
|
|
|
void
|
|
retrieve(argv, name)
|
|
char *argv[];
|
|
const char *name;
|
|
{
|
|
FILE *fin = NULL, *dout;
|
|
struct stat st;
|
|
int (*closefunc) __P((FILE *)) = NULL;
|
|
int log, sendrv, closerv, stderrfd, isconversion, isdata, isls;
|
|
struct timeval start, finish, td, *tdp;
|
|
const char *dispname;
|
|
|
|
sendrv = closerv = stderrfd = -1;
|
|
isconversion = isdata = isls = log = 0;
|
|
tdp = NULL;
|
|
dispname = name;
|
|
if (argv == NULL) {
|
|
log = 1;
|
|
isdata = 1;
|
|
fin = fopen(name, "r");
|
|
closefunc = fclose;
|
|
if (fin == NULL)
|
|
argv = do_conversion(name);
|
|
if (argv != NULL) {
|
|
isconversion++;
|
|
syslog(LOG_INFO, "get command: '%s' on '%s'",
|
|
argv[0], name);
|
|
}
|
|
}
|
|
if (argv != NULL) {
|
|
char temp[MAXPATHLEN];
|
|
|
|
if (strcmp(argv[0], INTERNAL_LS) == 0) {
|
|
isls = 1;
|
|
stderrfd = -1;
|
|
} else {
|
|
(void)snprintf(temp, sizeof(temp), "%s", TMPFILE);
|
|
stderrfd = mkstemp(temp);
|
|
if (stderrfd != -1)
|
|
(void)unlink(temp);
|
|
}
|
|
dispname = argv[0];
|
|
fin = ftpd_popen(argv, "r", stderrfd);
|
|
closefunc = ftpd_pclose;
|
|
st.st_size = -1;
|
|
st.st_blksize = BUFSIZ;
|
|
}
|
|
if (fin == NULL) {
|
|
if (errno != 0) {
|
|
perror_reply(550, dispname);
|
|
if (log)
|
|
logcmd("get", -1, name, NULL, NULL,
|
|
strerror(errno));
|
|
}
|
|
goto cleanupretrieve;
|
|
}
|
|
byte_count = -1;
|
|
if (argv == NULL
|
|
&& (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) {
|
|
reply(550, "%s: not a plain file.", dispname);
|
|
goto done;
|
|
}
|
|
if (restart_point) {
|
|
if (type == TYPE_A) {
|
|
off_t i;
|
|
int c;
|
|
|
|
for (i = 0; i < restart_point; i++) {
|
|
if ((c=getc(fin)) == EOF) {
|
|
perror_reply(550, dispname);
|
|
goto done;
|
|
}
|
|
if (c == '\n')
|
|
i++;
|
|
}
|
|
} else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
|
|
perror_reply(550, dispname);
|
|
goto done;
|
|
}
|
|
}
|
|
dout = dataconn(dispname, st.st_size, "w");
|
|
if (dout == NULL)
|
|
goto done;
|
|
|
|
(void)gettimeofday(&start, NULL);
|
|
sendrv = send_data(fin, dout, st.st_blksize, isdata);
|
|
(void)gettimeofday(&finish, NULL);
|
|
(void) fclose(dout);
|
|
timersub(&finish, &start, &td);
|
|
tdp = &td;
|
|
data = -1;
|
|
pdata = -1;
|
|
done:
|
|
if (log)
|
|
logcmd("get", byte_count, name, NULL, tdp, NULL);
|
|
closerv = (*closefunc)(fin);
|
|
if (sendrv == 0) {
|
|
FILE *err;
|
|
struct stat sb;
|
|
|
|
if (!isls && argv != NULL && closerv != 0) {
|
|
lreply(226,
|
|
"Command returned an exit status of %d",
|
|
closerv);
|
|
if (isconversion)
|
|
syslog(LOG_INFO,
|
|
"retrieve command: '%s' returned %d",
|
|
argv[0], closerv);
|
|
}
|
|
if (!isls && argv != NULL && stderrfd != -1 &&
|
|
(fstat(stderrfd, &sb) == 0) && sb.st_size > 0 &&
|
|
((err = fdopen(stderrfd, "r")) != NULL)) {
|
|
char *cp, line[LINE_MAX];
|
|
|
|
lreply(226, "Command error messages:");
|
|
rewind(err);
|
|
while (fgets(line, sizeof(line), err) != NULL) {
|
|
if ((cp = strchr(line, '\n')) != NULL)
|
|
*cp = '\0';
|
|
lreply(0, " %s", line);
|
|
}
|
|
(void) fflush(stdout);
|
|
(void) fclose(err);
|
|
/* a reply(226,) must follow */
|
|
}
|
|
reply(226, "Transfer complete.");
|
|
}
|
|
cleanupretrieve:
|
|
if (stderrfd != -1)
|
|
(void)close(stderrfd);
|
|
if (isconversion)
|
|
free(argv);
|
|
}
|
|
|
|
void
|
|
store(name, mode, unique)
|
|
const char *name, *mode;
|
|
int unique;
|
|
{
|
|
FILE *fout, *din;
|
|
struct stat st;
|
|
int (*closefunc) __P((FILE *));
|
|
struct timeval start, finish, td, *tdp;
|
|
char *desc;
|
|
|
|
desc = (*mode == 'w') ? "put" : "append";
|
|
if (unique && stat(name, &st) == 0 &&
|
|
(name = gunique(name)) == NULL) {
|
|
logcmd(desc, -1, name, NULL, NULL, "cannot create unique file");
|
|
return;
|
|
}
|
|
|
|
if (restart_point)
|
|
mode = "r+";
|
|
fout = fopen(name, mode);
|
|
closefunc = fclose;
|
|
tdp = NULL;
|
|
if (fout == NULL) {
|
|
perror_reply(553, name);
|
|
logcmd(desc, -1, name, NULL, NULL, strerror(errno));
|
|
return;
|
|
}
|
|
byte_count = -1;
|
|
if (restart_point) {
|
|
if (type == TYPE_A) {
|
|
off_t i;
|
|
int c;
|
|
|
|
for (i = 0; i < restart_point; i++) {
|
|
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) < 0) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
} else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
|
|
perror_reply(550, name);
|
|
goto done;
|
|
}
|
|
}
|
|
din = dataconn(name, (off_t)-1, "r");
|
|
if (din == NULL)
|
|
goto done;
|
|
(void)gettimeofday(&start, NULL);
|
|
if (receive_data(din, fout) == 0) {
|
|
if (unique)
|
|
reply(226, "Transfer complete (unique file name:%s).",
|
|
name);
|
|
else
|
|
reply(226, "Transfer complete.");
|
|
}
|
|
(void)gettimeofday(&finish, NULL);
|
|
(void) fclose(din);
|
|
timersub(&finish, &start, &td);
|
|
tdp = &td;
|
|
data = -1;
|
|
pdata = -1;
|
|
done:
|
|
logcmd(desc, byte_count, name, NULL, tdp, NULL);
|
|
(*closefunc)(fout);
|
|
}
|
|
|
|
static FILE *
|
|
getdatasock(mode)
|
|
const char *mode;
|
|
{
|
|
int on = 1, s, t, tries;
|
|
|
|
if (data >= 0)
|
|
return (fdopen(data, mode));
|
|
(void) seteuid((uid_t)0);
|
|
s = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
|
|
if (s < 0)
|
|
goto bad;
|
|
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
|
|
(char *) &on, sizeof(on)) < 0)
|
|
goto bad;
|
|
if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
|
|
(char *) &on, sizeof(on)) < 0)
|
|
goto bad;
|
|
/* anchor socket to avoid multi-homing problems */
|
|
data_source = ctrl_addr;
|
|
data_source.su_port = htons(20); /* ftp-data port */
|
|
for (tries = 1; ; tries++) {
|
|
if (bind(s, (struct sockaddr *)&data_source,
|
|
data_source.su_len) >= 0)
|
|
break;
|
|
if (errno != EADDRINUSE || tries > 10)
|
|
goto bad;
|
|
sleep(tries);
|
|
}
|
|
(void) seteuid((uid_t)pw->pw_uid);
|
|
#ifdef IP_TOS
|
|
if (!mapped && ctrl_addr.su_family == AF_INET) {
|
|
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:
|
|
/* Return the real value of errno (close may change it) */
|
|
t = errno;
|
|
(void) seteuid((uid_t)pw->pw_uid);
|
|
(void) close(s);
|
|
errno = t;
|
|
return (NULL);
|
|
}
|
|
|
|
static FILE *
|
|
dataconn(name, size, mode)
|
|
const char *name;
|
|
off_t size;
|
|
const char *mode;
|
|
{
|
|
char sizebuf[32];
|
|
FILE *file;
|
|
int retry = 0, tos, keepalive;
|
|
|
|
file_size = size;
|
|
byte_count = 0;
|
|
if (size != (off_t) -1)
|
|
(void)snprintf(sizebuf, sizeof(sizebuf), " (%qd byte%s)",
|
|
(qdfmt_t)size, PLURAL(size));
|
|
else
|
|
sizebuf[0] = '\0';
|
|
if (pdata >= 0) {
|
|
union sockunion from;
|
|
int s, fromlen = sizeof(from);
|
|
|
|
(void) alarm(curclass.timeout);
|
|
s = accept(pdata, (struct sockaddr *)&from, &fromlen);
|
|
(void) alarm(0);
|
|
if (s < 0) {
|
|
reply(425, "Can't open data connection.");
|
|
(void) close(pdata);
|
|
pdata = -1;
|
|
return (NULL);
|
|
}
|
|
(void) close(pdata);
|
|
pdata = s;
|
|
switch (from.su_family) {
|
|
case AF_INET:
|
|
#ifdef IP_TOS
|
|
if (!mapped) {
|
|
tos = IPTOS_THROUGHPUT;
|
|
(void) setsockopt(s, IPPROTO_IP, IP_TOS,
|
|
(char *)&tos, sizeof(int));
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
/* Set keepalives on the socket to detect dropped conns. */
|
|
#ifdef SO_KEEPALIVE
|
|
keepalive = 1;
|
|
(void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE,
|
|
(char *)&keepalive, 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) {
|
|
char hbuf[INET6_ADDRSTRLEN];
|
|
char pbuf[10];
|
|
getnameinfo((struct sockaddr *)&data_source, data_source.su_len,
|
|
hbuf, sizeof(hbuf), pbuf, sizeof(pbuf),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
reply(425, "Can't create data socket (%s,%s): %s.",
|
|
hbuf, pbuf, strerror(errno));
|
|
return (NULL);
|
|
}
|
|
data = fileno(file);
|
|
while (connect(data, (struct sockaddr *)&data_dest,
|
|
data_dest.su_len) < 0) {
|
|
if (errno == EADDRINUSE && retry < swaitmax) {
|
|
sleep((unsigned) swaitint);
|
|
retry += swaitint;
|
|
continue;
|
|
}
|
|
perror_reply(425, "Can't build data connection");
|
|
(void) 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 int
|
|
send_data(instr, outstr, blksize, isdata)
|
|
FILE *instr, *outstr;
|
|
off_t blksize;
|
|
int isdata;
|
|
{
|
|
int c, filefd, netfd, rval;
|
|
char *buf;
|
|
|
|
transflag = 1;
|
|
rval = -1;
|
|
buf = NULL;
|
|
if (setjmp(urgcatch))
|
|
goto cleanup_send_data;
|
|
|
|
switch (type) {
|
|
|
|
case TYPE_A:
|
|
/* XXXX: rate limit ascii send (get) */
|
|
(void) alarm(curclass.timeout);
|
|
while ((c = getc(instr)) != EOF) {
|
|
byte_count++;
|
|
if (c == '\n') {
|
|
if (ferror(outstr))
|
|
goto data_err;
|
|
(void) putc('\r', outstr);
|
|
if (isdata) {
|
|
total_data_out++;
|
|
total_data++;
|
|
}
|
|
total_bytes_out++;
|
|
total_bytes++;
|
|
}
|
|
(void) putc(c, outstr);
|
|
if (isdata) {
|
|
total_data_out++;
|
|
total_data++;
|
|
}
|
|
total_bytes_out++;
|
|
total_bytes++;
|
|
if ((byte_count % 4096) == 0)
|
|
(void) alarm(curclass.timeout);
|
|
}
|
|
(void) alarm(0);
|
|
fflush(outstr);
|
|
if (ferror(instr))
|
|
goto file_err;
|
|
if (ferror(outstr))
|
|
goto data_err;
|
|
rval = 0;
|
|
goto cleanup_send_data;
|
|
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
if ((buf = malloc((size_t)blksize)) == NULL) {
|
|
perror_reply(451, "Local resource failure: malloc");
|
|
goto cleanup_send_data;
|
|
}
|
|
filefd = fileno(instr);
|
|
netfd = fileno(outstr);
|
|
(void) alarm(curclass.timeout);
|
|
if (curclass.rateget) {
|
|
while (1) {
|
|
int d;
|
|
struct timeval then, now, td;
|
|
off_t bufrem;
|
|
char *bufp;
|
|
|
|
(void)gettimeofday(&then, NULL);
|
|
errno = c = d = 0;
|
|
bufrem = curclass.rateget;
|
|
while (bufrem > 0) {
|
|
if ((c = read(filefd, buf,
|
|
MIN(blksize, bufrem))) <= 0)
|
|
goto senddone;
|
|
(void) alarm(curclass.timeout);
|
|
bufrem -= c;
|
|
byte_count += c;
|
|
if (isdata) {
|
|
total_data_out += c;
|
|
total_data += c;
|
|
}
|
|
total_bytes_out += c;
|
|
total_bytes += c;
|
|
for (bufp = buf; c > 0;
|
|
c -= d, bufp += d)
|
|
if ((d =
|
|
write(netfd, bufp, c)) <= 0)
|
|
break;
|
|
if (d < 0)
|
|
goto data_err;
|
|
}
|
|
(void)gettimeofday(&now, NULL);
|
|
timersub(&now, &then, &td);
|
|
if (td.tv_sec > 0)
|
|
break;
|
|
usleep(1000000 - td.tv_usec);
|
|
}
|
|
} else {
|
|
while ((c = read(filefd, buf, (size_t)blksize)) > 0) {
|
|
if (write(netfd, buf, c) != c)
|
|
goto data_err;
|
|
(void) alarm(curclass.timeout);
|
|
byte_count += c;
|
|
if (isdata) {
|
|
total_data_out += c;
|
|
total_data += c;
|
|
}
|
|
total_bytes_out += c;
|
|
total_bytes += c;
|
|
}
|
|
}
|
|
senddone:
|
|
if (c < 0)
|
|
goto file_err;
|
|
rval = 0;
|
|
goto cleanup_send_data;
|
|
|
|
default:
|
|
reply(550, "Unimplemented TYPE %d in send_data", type);
|
|
goto cleanup_send_data;
|
|
}
|
|
|
|
data_err:
|
|
(void) alarm(0);
|
|
perror_reply(426, "Data connection");
|
|
goto cleanup_send_data;
|
|
|
|
file_err:
|
|
(void) alarm(0);
|
|
perror_reply(551, "Error on input file");
|
|
/* FALLTHROUGH */
|
|
|
|
cleanup_send_data:
|
|
(void) alarm(0);
|
|
transflag = 0;
|
|
if (buf)
|
|
free(buf);
|
|
if (isdata) {
|
|
total_files_out++;
|
|
total_files++;
|
|
}
|
|
total_xfers_out++;
|
|
total_xfers++;
|
|
return (rval);
|
|
}
|
|
|
|
/*
|
|
* 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(instr, outstr)
|
|
FILE *instr, *outstr;
|
|
{
|
|
int c, bare_lfs, netfd, filefd, rval;
|
|
char buf[BUFSIZ];
|
|
#ifdef __GNUC__
|
|
(void) &bare_lfs;
|
|
#endif
|
|
|
|
bare_lfs = 0;
|
|
transflag = 1;
|
|
rval = -1;
|
|
if (setjmp(urgcatch))
|
|
goto cleanup_recv_data;
|
|
|
|
switch (type) {
|
|
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
netfd = fileno(instr);
|
|
filefd = fileno(outstr);
|
|
(void) alarm(curclass.timeout);
|
|
if (curclass.rateput) {
|
|
while (1) {
|
|
int d;
|
|
struct timeval then, now, td;
|
|
off_t bufrem;
|
|
|
|
(void)gettimeofday(&then, NULL);
|
|
errno = c = d = 0;
|
|
for (bufrem = curclass.rateput; bufrem > 0; ) {
|
|
if ((c = read(netfd, buf,
|
|
MIN(sizeof(buf), bufrem))) <= 0)
|
|
goto recvdone;
|
|
if ((d = write(filefd, buf, c)) != c)
|
|
goto recvdone;
|
|
(void) alarm(curclass.timeout);
|
|
bufrem -= c;
|
|
byte_count += c;
|
|
total_data_in += c;
|
|
total_data += c;
|
|
total_bytes_in += c;
|
|
total_bytes += c;
|
|
}
|
|
(void)gettimeofday(&now, NULL);
|
|
timersub(&now, &then, &td);
|
|
if (td.tv_sec > 0)
|
|
break;
|
|
usleep(1000000 - td.tv_usec);
|
|
}
|
|
} else {
|
|
while ((c = read(netfd, buf, sizeof(buf))) > 0) {
|
|
if (write(filefd, buf, c) != c)
|
|
goto file_err;
|
|
(void) alarm(curclass.timeout);
|
|
byte_count += c;
|
|
total_data_in += c;
|
|
total_data += c;
|
|
total_bytes_in += c;
|
|
total_bytes += c;
|
|
}
|
|
}
|
|
recvdone:
|
|
if (c < 0)
|
|
goto data_err;
|
|
rval = 0;
|
|
goto cleanup_recv_data;
|
|
|
|
case TYPE_E:
|
|
reply(553, "TYPE E not implemented.");
|
|
goto cleanup_recv_data;
|
|
|
|
case TYPE_A:
|
|
(void) alarm(curclass.timeout);
|
|
/* XXXX: rate limit ascii receive (put) */
|
|
while ((c = getc(instr)) != EOF) {
|
|
byte_count++;
|
|
total_data_in++;
|
|
total_data++;
|
|
total_bytes_in++;
|
|
total_bytes++;
|
|
if ((byte_count % 4096) == 0)
|
|
(void) alarm(curclass.timeout);
|
|
if (c == '\n')
|
|
bare_lfs++;
|
|
while (c == '\r') {
|
|
if (ferror(outstr))
|
|
goto data_err;
|
|
if ((c = getc(instr)) != '\n') {
|
|
byte_count++;
|
|
total_data_in++;
|
|
total_data++;
|
|
total_bytes_in++;
|
|
total_bytes++;
|
|
if ((byte_count % 4096) == 0)
|
|
(void) alarm(curclass.timeout);
|
|
(void) putc ('\r', outstr);
|
|
if (c == '\0' || c == EOF)
|
|
goto contin2;
|
|
}
|
|
}
|
|
(void) putc(c, outstr);
|
|
contin2: ;
|
|
}
|
|
(void) alarm(0);
|
|
fflush(outstr);
|
|
if (ferror(instr))
|
|
goto data_err;
|
|
if (ferror(outstr))
|
|
goto file_err;
|
|
if (bare_lfs) {
|
|
lreply(226,
|
|
"WARNING! %d bare linefeeds received in ASCII mode",
|
|
bare_lfs);
|
|
lreply(0, "File may not have transferred correctly.");
|
|
}
|
|
rval = 0;
|
|
goto cleanup_recv_data;
|
|
|
|
default:
|
|
reply(550, "Unimplemented TYPE %d in receive_data", type);
|
|
goto cleanup_recv_data;
|
|
}
|
|
|
|
data_err:
|
|
(void) alarm(0);
|
|
perror_reply(426, "Data Connection");
|
|
goto cleanup_recv_data;
|
|
|
|
file_err:
|
|
(void) alarm(0);
|
|
perror_reply(452, "Error writing file");
|
|
goto cleanup_recv_data;
|
|
|
|
cleanup_recv_data:
|
|
(void) alarm(0);
|
|
transflag = 0;
|
|
total_files_in++;
|
|
total_files++;
|
|
total_xfers_in++;
|
|
total_xfers++;
|
|
return (rval);
|
|
}
|
|
|
|
void
|
|
statfilecmd(filename)
|
|
const char *filename;
|
|
{
|
|
FILE *fin;
|
|
int c;
|
|
char *argv[] = { INTERNAL_LS, "-lgA", "", NULL };
|
|
|
|
argv[2] = (char *)filename;
|
|
fin = ftpd_popen(argv, "r", STDOUT_FILENO);
|
|
lreply(211, "status of %s:", filename);
|
|
while ((c = getc(fin)) != EOF) {
|
|
if (c == '\n') {
|
|
if (ferror(stdout)){
|
|
perror_reply(421, "control connection");
|
|
(void) ftpd_pclose(fin);
|
|
dologout(1);
|
|
/* NOTREACHED */
|
|
}
|
|
if (ferror(fin)) {
|
|
perror_reply(551, filename);
|
|
(void) ftpd_pclose(fin);
|
|
return;
|
|
}
|
|
(void) putchar('\r');
|
|
total_bytes++;
|
|
total_bytes_out++;
|
|
}
|
|
(void) putchar(c);
|
|
total_bytes++;
|
|
total_bytes_out++;
|
|
}
|
|
(void) ftpd_pclose(fin);
|
|
reply(211, "End of Status");
|
|
}
|
|
|
|
void
|
|
statcmd()
|
|
{
|
|
union sockunion *su = NULL;
|
|
static char ntop_buf[INET6_ADDRSTRLEN];
|
|
u_char *a, *p;
|
|
int ispassive;
|
|
off_t b, otbi, otbo, otb;
|
|
|
|
a = p = (u_char *)NULL;
|
|
|
|
lreply(211, "%s FTP server status:", hostname);
|
|
lreply(0, "%s", version);
|
|
ntop_buf[0] = '\0';
|
|
if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len,
|
|
ntop_buf, sizeof(ntop_buf), NULL, 0, NI_NUMERICHOST)
|
|
&& strcmp(remotehost, ntop_buf) != 0) {
|
|
lreply(0, "Connected to %s (%s)", remotehost, ntop_buf);
|
|
} else
|
|
lreply(0, "Connected to %s", remotehost);
|
|
if (logged_in) {
|
|
if (curclass.type == CLASS_GUEST)
|
|
lreply(0, "Logged in anonymously");
|
|
else
|
|
lreply(0, "Logged in as %s%s", pw->pw_name,
|
|
curclass.type == CLASS_CHROOT ? " (chroot)" : "");
|
|
} else if (askpasswd)
|
|
lreply(0, "Waiting for password");
|
|
else
|
|
lreply(0, "Waiting for user name");
|
|
b = printf(" TYPE: %s", typenames[type]);
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
if (type == TYPE_A || type == TYPE_E) {
|
|
b = printf(", FORM: %s", formnames[form]);
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
}
|
|
if (type == TYPE_L) {
|
|
#if NBBY == 8
|
|
b = printf(" %d", NBBY);
|
|
#else
|
|
/* XXX: `bytesize' needs to be defined in this case */
|
|
b = printf(" %d", bytesize);
|
|
#endif
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
}
|
|
b = printf("; STRUcture: %s; transfer MODE: %s\r\n",
|
|
strunames[stru], modenames[mode]);
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
ispassive = 0;
|
|
if (data != -1) {
|
|
lreply(0, "Data connection open");
|
|
su = NULL;
|
|
} else if (pdata != -1) {
|
|
b = printf(" in Passive mode");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
su = (union sockunion *)&pasv_addr;
|
|
ispassive = 1;
|
|
goto printaddr;
|
|
} else if (usedefault == 0) {
|
|
if (epsvall) {
|
|
b = printf("211- EPSV only mode (EPSV ALL )\r\n");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
goto epsvonly;
|
|
}
|
|
b = printf("211- %s",
|
|
(data_dest.su_family == AF_INET) ? "PORT" : "LPRT");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
su = (union sockunion *)&data_dest;
|
|
printaddr:
|
|
/* PASV/PORT */
|
|
if (su->su_family == AF_INET) {
|
|
if (ispassive)
|
|
b = printf("211- PASV ");
|
|
else
|
|
b = printf("211- PORT ");
|
|
a = (u_char *) &su->su_sin.sin_addr;
|
|
p = (u_char *) &su->su_sin.sin_port;
|
|
#define UC(b) (((int) b) & 0xff)
|
|
b += 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]));
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
}
|
|
|
|
/* LPSV/LPRT */
|
|
{
|
|
int alen, af, i;
|
|
|
|
alen = 0;
|
|
switch (su->su_family) {
|
|
case AF_INET:
|
|
a = (u_char *) &su->su_sin.sin_addr;
|
|
p = (u_char *) &su->su_sin.sin_port;
|
|
alen = sizeof(su->su_sin.sin_addr);
|
|
af = 4;
|
|
break;
|
|
case AF_INET6:
|
|
a = (u_char *) &su->su_sin6.sin6_addr;
|
|
p = (u_char *) &su->su_sin6.sin6_port;
|
|
alen = sizeof(su->su_sin6.sin6_addr);
|
|
af = 6;
|
|
break;
|
|
default:
|
|
af = 0;
|
|
break;
|
|
}
|
|
if (af) {
|
|
if (ispassive)
|
|
b = printf("211- LPSV ");
|
|
else
|
|
b = printf("211- LPRT ");
|
|
printf("(%d,%d", af, alen);
|
|
for (i = 0; i < alen; i++)
|
|
b += printf("%d,", UC(a[alen]));
|
|
b += printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1]));
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
#undef UC
|
|
}
|
|
}
|
|
|
|
/* EPRT/EPSV */
|
|
epsvonly:;
|
|
{
|
|
int af;
|
|
|
|
switch (su->su_family) {
|
|
case AF_INET:
|
|
af = 1;
|
|
break;
|
|
case AF_INET6:
|
|
af = 2;
|
|
break;
|
|
default:
|
|
af = 0;
|
|
break;
|
|
}
|
|
if (af) {
|
|
if (getnameinfo((struct sockaddr *)su, su->su_len,
|
|
ntop_buf, sizeof(ntop_buf), NULL, 0,
|
|
NI_NUMERICHOST) == 0) {
|
|
if (ispassive)
|
|
b = printf("211 - EPSV ");
|
|
else
|
|
b = printf("211 - EPRT ");
|
|
b += printf("(|%d|%s|%d|)\r\n",
|
|
af, ntop_buf, ntohs(su->su_port));
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
lreply(0, "No data connection");
|
|
|
|
if (logged_in) {
|
|
lreply(0, "Data sent: %qd byte%s in %qd file%s",
|
|
(qdfmt_t)total_data_out, PLURAL(total_data_out),
|
|
(qdfmt_t)total_files_out, PLURAL(total_files_out));
|
|
lreply(0, "Data received: %qd byte%s in %qd file%s",
|
|
(qdfmt_t)total_data_in, PLURAL(total_data_in),
|
|
(qdfmt_t)total_files_in, PLURAL(total_files_in));
|
|
lreply(0, "Total data: %qd byte%s in %qd file%s",
|
|
(qdfmt_t)total_data, PLURAL(total_data),
|
|
(qdfmt_t)total_files, PLURAL(total_files));
|
|
}
|
|
otbi = total_bytes_in;
|
|
otbo = total_bytes_out;
|
|
otb = total_bytes;
|
|
lreply(0, "Traffic sent: %qd byte%s in %qd transfer%s",
|
|
(qdfmt_t)otbo, PLURAL(otbo),
|
|
(qdfmt_t)total_xfers_out, PLURAL(total_xfers_out));
|
|
lreply(0, "Traffic received: %qd byte%s in %qd transfer%s",
|
|
(qdfmt_t)otbi, PLURAL(otbi),
|
|
(qdfmt_t)total_xfers_in, PLURAL(total_xfers_in));
|
|
lreply(0, "Total traffic: %qd byte%s in %qd transfer%s",
|
|
(qdfmt_t)otb, PLURAL(otb),
|
|
(qdfmt_t)total_xfers, PLURAL(total_xfers));
|
|
|
|
if (logged_in) {
|
|
struct ftpconv *cp;
|
|
|
|
lreply(0, "");
|
|
lreply(0, "Class: %s, type: %s",
|
|
curclass.classname, CURCLASSTYPE);
|
|
lreply(0, "Check PORT/LPRT commands: %sabled",
|
|
curclass.checkportcmd ? "en" : "dis");
|
|
if (curclass.display != NULL)
|
|
lreply(0, "Display file: %s", curclass.display);
|
|
if (curclass.notify != NULL)
|
|
lreply(0, "Notify fileglob: %s", curclass.notify);
|
|
lreply(0, "Idle timeout: %d, maximum timeout: %d",
|
|
curclass.timeout, curclass.maxtimeout);
|
|
lreply(0, "Current connections: %d", connections);
|
|
if (curclass.limit == -1)
|
|
lreply(0, "Maximum connections: unlimited");
|
|
else
|
|
lreply(0, "Maximum connections: %d", curclass.limit);
|
|
if (curclass.limitfile)
|
|
lreply(0, "Connection limit exceeded file: %s",
|
|
curclass.limitfile);
|
|
if (curclass.motd != NULL)
|
|
lreply(0, "MotD file: %s", curclass.motd);
|
|
lreply(0,
|
|
"Modify commands (CHMOD, DELE, MKD, RMD, RNFR, UMASK): %sabled",
|
|
curclass.modify ? "en" : "dis");
|
|
lreply(0,
|
|
"Upload commands (APPE, STOR, STOU): %sabled",
|
|
curclass.upload ? "en" : "dis");
|
|
if (curclass.portmin && curclass.portmax)
|
|
lreply(0, "PASV port range: %d - %d",
|
|
curclass.portmin, curclass.portmax);
|
|
if (curclass.rateget)
|
|
lreply(0, "Rate get limit: %d bytes/sec",
|
|
curclass.rateget);
|
|
else
|
|
lreply(0, "Rate get limit: disabled");
|
|
if (curclass.rateput)
|
|
lreply(0, "Rate put limit: %d bytes/sec",
|
|
curclass.rateput);
|
|
else
|
|
lreply(0, "Rate put limit: disabled");
|
|
lreply(0, "Umask: %.04o", curclass.umask);
|
|
for (cp = curclass.conversions; cp != NULL; cp=cp->next) {
|
|
if (cp->suffix == NULL || cp->types == NULL ||
|
|
cp->command == NULL)
|
|
continue;
|
|
lreply(0,
|
|
"Conversion: %s [%s] disable: %s, command: %s",
|
|
cp->suffix, cp->types, cp->disable, cp->command);
|
|
}
|
|
}
|
|
|
|
reply(211, "End of status");
|
|
}
|
|
|
|
void
|
|
fatal(s)
|
|
const char *s;
|
|
{
|
|
|
|
reply(451, "Error in server: %s\n", s);
|
|
reply(221, "Closing connection due to server error.");
|
|
dologout(0);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
void
|
|
#ifdef __STDC__
|
|
reply(int n, const char *fmt, ...)
|
|
#else
|
|
reply(n, fmt, va_alist)
|
|
int n;
|
|
char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
off_t b;
|
|
va_list ap;
|
|
#ifdef __STDC__
|
|
va_start(ap, fmt);
|
|
#else
|
|
va_start(ap);
|
|
#endif
|
|
b = 0;
|
|
b += printf("%d ", n);
|
|
b += vprintf(fmt, ap);
|
|
b += printf("\r\n");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
(void)fflush(stdout);
|
|
if (debug) {
|
|
syslog(LOG_DEBUG, "<--- %d ", n);
|
|
vsyslog(LOG_DEBUG, fmt, ap);
|
|
}
|
|
}
|
|
|
|
void
|
|
#ifdef __STDC__
|
|
lreply(int n, const char *fmt, ...)
|
|
#else
|
|
lreply(n, fmt, va_alist)
|
|
int n;
|
|
char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
off_t b;
|
|
va_list ap;
|
|
#ifdef __STDC__
|
|
va_start(ap, fmt);
|
|
#else
|
|
va_start(ap);
|
|
#endif
|
|
b = 0;
|
|
switch (n) {
|
|
case 0:
|
|
b += printf(" ");
|
|
case -1:
|
|
break;
|
|
default:
|
|
b += printf("%d-", n);
|
|
break;
|
|
}
|
|
b += vprintf(fmt, ap);
|
|
b += printf("\r\n");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
(void)fflush(stdout);
|
|
if (debug) {
|
|
syslog(LOG_DEBUG, "<--- %d- ", n);
|
|
vsyslog(LOG_DEBUG, fmt, ap);
|
|
}
|
|
}
|
|
|
|
static void
|
|
ack(s)
|
|
const char *s;
|
|
{
|
|
|
|
reply(250, "%s command successful.", s);
|
|
}
|
|
|
|
void
|
|
delete(name)
|
|
const char *name;
|
|
{
|
|
char *p = NULL;
|
|
|
|
if (remove(name) < 0) {
|
|
p = strerror(errno);
|
|
perror_reply(550, name);
|
|
} else
|
|
ack("DELE");
|
|
logcmd("delete", -1, name, NULL, NULL, p);
|
|
}
|
|
|
|
void
|
|
cwd(path)
|
|
const char *path;
|
|
{
|
|
|
|
if (chdir(path) < 0)
|
|
perror_reply(550, path);
|
|
else {
|
|
show_chdir_messages(250);
|
|
ack("CWD");
|
|
}
|
|
}
|
|
|
|
static void
|
|
replydirname(name, message)
|
|
const char *name, *message;
|
|
{
|
|
char npath[MAXPATHLEN];
|
|
int i;
|
|
|
|
for (i = 0; *name != '\0' && i < sizeof(npath) - 1; i++, name++) {
|
|
npath[i] = *name;
|
|
if (*name == '"')
|
|
npath[++i] = '"';
|
|
}
|
|
npath[i] = '\0';
|
|
reply(257, "\"%s\" %s", npath, message);
|
|
}
|
|
|
|
void
|
|
makedir(name)
|
|
const char *name;
|
|
{
|
|
char *p = NULL;
|
|
|
|
if (mkdir(name, 0777) < 0) {
|
|
p = strerror(errno);
|
|
perror_reply(550, name);
|
|
} else
|
|
replydirname(name, "directory created.");
|
|
logcmd("mkdir", -1, name, NULL, NULL, p);
|
|
}
|
|
|
|
void
|
|
removedir(name)
|
|
const char *name;
|
|
{
|
|
char *p = NULL;
|
|
|
|
if (rmdir(name) < 0) {
|
|
p = strerror(errno);
|
|
perror_reply(550, name);
|
|
} else
|
|
ack("RMD");
|
|
logcmd("rmdir", -1, name, NULL, NULL, p);
|
|
}
|
|
|
|
void
|
|
pwd()
|
|
{
|
|
char path[MAXPATHLEN];
|
|
|
|
if (getcwd(path, sizeof(path) - 1) == NULL)
|
|
reply(550, "Can't get the current directory: %s.",
|
|
strerror(errno));
|
|
else
|
|
replydirname(path, "is the current directory.");
|
|
}
|
|
|
|
char *
|
|
renamefrom(name)
|
|
char *name;
|
|
{
|
|
struct stat st;
|
|
|
|
if (stat(name, &st) < 0) {
|
|
perror_reply(550, name);
|
|
return (NULL);
|
|
}
|
|
reply(350, "File exists, ready for destination name");
|
|
return (xstrdup(name));
|
|
}
|
|
|
|
void
|
|
renamecmd(from, to)
|
|
const char *from, *to;
|
|
{
|
|
char *p = NULL;
|
|
|
|
if (rename(from, to) < 0) {
|
|
p = strerror(errno);
|
|
perror_reply(550, "rename");
|
|
} else
|
|
ack("RNTO");
|
|
logcmd("rename", -1, from, to, NULL, p);
|
|
}
|
|
|
|
static void
|
|
dolog(who)
|
|
struct sockaddr *who;
|
|
{
|
|
getnameinfo(who, who->sa_len, remotehost, sizeof(remotehost), NULL,0,0);
|
|
#ifdef HASSETPROCTITLE
|
|
snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
|
|
setproctitle(proctitle);
|
|
#endif /* HASSETPROCTITLE */
|
|
if (logging)
|
|
syslog(LOG_INFO, "connection from %s to %s",
|
|
remotehost, hostname);
|
|
}
|
|
|
|
/*
|
|
* Record logout in wtmp file
|
|
* and exit with supplied status.
|
|
*/
|
|
void
|
|
dologout(status)
|
|
int status;
|
|
{
|
|
/*
|
|
* Prevent reception of SIGURG from resulting in a resumption
|
|
* back to the main program loop.
|
|
*/
|
|
transflag = 0;
|
|
|
|
if (logged_in) {
|
|
(void) seteuid((uid_t)0);
|
|
logwtmp(ttyline, "", "");
|
|
if (doutmp)
|
|
logout(utmp.ut_line);
|
|
#ifdef KERBEROS
|
|
if (!notickets && krbtkfile_env)
|
|
unlink(krbtkfile_env);
|
|
#endif
|
|
}
|
|
/* beware of flushing buffers after a SIGPIPE */
|
|
_exit(status);
|
|
}
|
|
|
|
static void
|
|
myoob(signo)
|
|
int signo;
|
|
{
|
|
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);
|
|
}
|
|
if (strcasecmp(cp, "ABOR\r\n") == 0) {
|
|
tmpline[0] = '\0';
|
|
reply(426, "Transfer aborted. Data connection closed.");
|
|
reply(226, "Abort successful");
|
|
longjmp(urgcatch, 1);
|
|
}
|
|
if (strcasecmp(cp, "STAT\r\n") == 0) {
|
|
tmpline[0] = '\0';
|
|
if (file_size != (off_t) -1)
|
|
reply(213, "Status: %qd of %qd byte%s transferred",
|
|
(qdfmt_t)byte_count, (qdfmt_t)file_size,
|
|
PLURAL(byte_count));
|
|
else
|
|
reply(213, "Status: %qd byte%s transferred",
|
|
(qdfmt_t)byte_count, PLURAL(byte_count));
|
|
}
|
|
}
|
|
|
|
static int
|
|
bind_pasv_addr()
|
|
{
|
|
static int passiveport;
|
|
int port, len;
|
|
|
|
len = pasv_addr.su_len;
|
|
if (curclass.portmin == 0 && curclass.portmax == 0) {
|
|
pasv_addr.su_port = 0;
|
|
return (bind(pdata, (struct sockaddr *)&pasv_addr, len));
|
|
}
|
|
|
|
if (passiveport == 0) {
|
|
srand(getpid());
|
|
passiveport = rand() % (curclass.portmax - curclass.portmin)
|
|
+ curclass.portmin;
|
|
}
|
|
|
|
port = passiveport;
|
|
while (1) {
|
|
port++;
|
|
if (port > curclass.portmax)
|
|
port = curclass.portmin;
|
|
else if (port == passiveport) {
|
|
errno = EAGAIN;
|
|
return (-1);
|
|
}
|
|
pasv_addr.su_port = htons(port);
|
|
if (bind(pdata, (struct sockaddr *)&pasv_addr, len) == 0)
|
|
break;
|
|
if (errno != EADDRINUSE)
|
|
return (-1);
|
|
}
|
|
passiveport = port;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
void
|
|
passive()
|
|
{
|
|
int len;
|
|
char *p, *a;
|
|
|
|
if (pdata >= 0)
|
|
close(pdata);
|
|
pdata = socket(AF_INET, SOCK_STREAM, 0);
|
|
if (pdata < 0 || !logged_in) {
|
|
perror_reply(425, "Can't open passive connection");
|
|
return;
|
|
}
|
|
pasv_addr = ctrl_addr;
|
|
|
|
if (bind_pasv_addr() < 0)
|
|
goto pasv_error;
|
|
len = pasv_addr.su_len;
|
|
if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
|
|
goto pasv_error;
|
|
if (listen(pdata, 1) < 0)
|
|
goto pasv_error;
|
|
a = (char *) &pasv_addr.su_sin.sin_addr;
|
|
p = (char *) &pasv_addr.su_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:
|
|
(void) close(pdata);
|
|
pdata = -1;
|
|
perror_reply(425, "Can't open passive connection");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* 228 Entering Long Passive Mode (af, hal, h1, h2, h3,..., pal, p1, p2...)
|
|
* 229 Entering Extended Passive Mode (|||port|)
|
|
*/
|
|
void
|
|
long_passive(char *cmd, int pf)
|
|
{
|
|
int len;
|
|
char *p, *a;
|
|
|
|
if (!logged_in) {
|
|
syslog(LOG_NOTICE, "long passive but not logged in");
|
|
reply(503, "Login with USER first.");
|
|
return;
|
|
}
|
|
|
|
if (pf != PF_UNSPEC) {
|
|
if (ctrl_addr.su_family != pf) {
|
|
switch (ctrl_addr.su_family) {
|
|
case AF_INET:
|
|
pf = 1;
|
|
break;
|
|
case AF_INET6:
|
|
pf = 2;
|
|
break;
|
|
default:
|
|
pf = 0;
|
|
break;
|
|
}
|
|
/*
|
|
* XXX
|
|
* only EPRT/EPSV ready clients will understand this
|
|
*/
|
|
if (strcmp(cmd, "EPSV") == 0 && pf) {
|
|
reply(522, "Network protocol mismatch, "
|
|
"use (%d)", pf);
|
|
} else
|
|
reply(501, "Network protocol mismatch"); /*XXX*/
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (pdata >= 0)
|
|
close(pdata);
|
|
pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0);
|
|
if (pdata < 0) {
|
|
perror_reply(425, "Can't open passive connection");
|
|
return;
|
|
}
|
|
pasv_addr = ctrl_addr;
|
|
if (bind_pasv_addr() < 0)
|
|
goto pasv_error;
|
|
len = pasv_addr.su_len;
|
|
if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0)
|
|
goto pasv_error;
|
|
if (listen(pdata, 1) < 0)
|
|
goto pasv_error;
|
|
p = (char *) &pasv_addr.su_port;
|
|
|
|
#define UC(b) (((int) b) & 0xff)
|
|
|
|
if (strcmp(cmd, "LPSV") == 0) {
|
|
switch (pasv_addr.su_family) {
|
|
case AF_INET:
|
|
a = (char *) &pasv_addr.su_sin.sin_addr;
|
|
reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)",
|
|
4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
|
|
2, UC(p[0]), UC(p[1]));
|
|
return;
|
|
case AF_INET6:
|
|
a = (char *) &pasv_addr.su_sin6.sin6_addr;
|
|
reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)",
|
|
6, 16,
|
|
UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
|
|
UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]),
|
|
UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]),
|
|
UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]),
|
|
2, UC(p[0]), UC(p[1]));
|
|
return;
|
|
}
|
|
#undef UC
|
|
} else if (strcmp(cmd, "EPSV") == 0) {
|
|
switch (pasv_addr.su_family) {
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
reply(229, "Entering Extended Passive Mode (|||%d|)",
|
|
ntohs(pasv_addr.su_port));
|
|
return;
|
|
}
|
|
} else {
|
|
/* more proper error code? */
|
|
}
|
|
|
|
pasv_error:
|
|
(void) 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.
|
|
*
|
|
* XXX this function should under go changes similar to
|
|
* the mktemp(3)/mkstemp(3) changes.
|
|
*/
|
|
static char *
|
|
gunique(local)
|
|
const char *local;
|
|
{
|
|
static char new[MAXPATHLEN];
|
|
struct stat st;
|
|
char *cp;
|
|
int count;
|
|
|
|
cp = strrchr(local, '/');
|
|
if (cp)
|
|
*cp = '\0';
|
|
if (stat(cp ? local : ".", &st) < 0) {
|
|
perror_reply(553, cp ? local : ".");
|
|
return (NULL);
|
|
}
|
|
if (cp)
|
|
*cp = '/';
|
|
for (count = 1; count < 100; count++) {
|
|
(void)snprintf(new, sizeof(new) - 1, "%s.%d", local, count);
|
|
if (stat(new, &st) < 0)
|
|
return (new);
|
|
}
|
|
reply(452, "Unique file name cannot be created.");
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Format and send reply containing system error number.
|
|
*/
|
|
void
|
|
perror_reply(code, string)
|
|
int code;
|
|
const char *string;
|
|
{
|
|
int save_errno;
|
|
|
|
save_errno = errno;
|
|
reply(code, "%s: %s.", string, strerror(errno));
|
|
errno = save_errno;
|
|
}
|
|
|
|
static char *onefile[] = {
|
|
"",
|
|
0
|
|
};
|
|
|
|
void
|
|
send_file_list(whichf)
|
|
const char *whichf;
|
|
{
|
|
struct stat st;
|
|
DIR *dirp = NULL;
|
|
struct dirent *dir;
|
|
FILE *dout = NULL;
|
|
char **dirlist, *dirname, *p;
|
|
int simple = 0;
|
|
int freeglob = 0;
|
|
glob_t gl;
|
|
off_t b;
|
|
|
|
#ifdef __GNUC__
|
|
(void) &dout;
|
|
(void) &dirlist;
|
|
(void) &simple;
|
|
(void) &freeglob;
|
|
#endif
|
|
|
|
p = NULL;
|
|
if (strpbrk(whichf, "~{[*?") != NULL) {
|
|
int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
|
|
|
|
memset(&gl, 0, sizeof(gl));
|
|
freeglob = 1;
|
|
if (glob(whichf, flags, 0, &gl)) {
|
|
reply(550, "not found");
|
|
goto out;
|
|
} else if (gl.gl_pathc == 0) {
|
|
errno = ENOENT;
|
|
perror_reply(550, whichf);
|
|
goto out;
|
|
}
|
|
dirlist = gl.gl_pathv;
|
|
} else {
|
|
p = xstrdup(whichf);
|
|
onefile[0] = p;
|
|
dirlist = onefile;
|
|
simple = 1;
|
|
}
|
|
/* XXX: } for vi sm */
|
|
|
|
if (setjmp(urgcatch)) {
|
|
transflag = 0;
|
|
goto out;
|
|
}
|
|
while ((dirname = *dirlist++) != NULL) {
|
|
int trailingslash = 0;
|
|
|
|
if (stat(dirname, &st) < 0) {
|
|
/*
|
|
* If user typed "ls -l", etc, and the client
|
|
* used NLST, do what the user meant.
|
|
*/
|
|
/* XXX: nuke this support? */
|
|
if (dirname[0] == '-' && *dirlist == NULL &&
|
|
transflag == 0) {
|
|
char *argv[] = { INTERNAL_LS, "", NULL };
|
|
|
|
argv[1] = dirname;
|
|
retrieve(argv, dirname);
|
|
goto out;
|
|
}
|
|
perror_reply(550, whichf);
|
|
if (dout != NULL) {
|
|
(void) fclose(dout);
|
|
transflag = 0;
|
|
data = -1;
|
|
pdata = -1;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (S_ISREG(st.st_mode)) {
|
|
if (dout == NULL) {
|
|
dout = dataconn("file list", (off_t)-1, "w");
|
|
if (dout == NULL)
|
|
goto out;
|
|
transflag++;
|
|
}
|
|
b = fprintf(dout, "%s%s\n", dirname,
|
|
type == TYPE_A ? "\r" : "");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
byte_count += strlen(dirname) + 1;
|
|
continue;
|
|
} else if (!S_ISDIR(st.st_mode))
|
|
continue;
|
|
|
|
if (dirname[strlen(dirname) - 1] == '/')
|
|
trailingslash++;
|
|
|
|
if ((dirp = opendir(dirname)) == NULL)
|
|
continue;
|
|
|
|
while ((dir = readdir(dirp)) != NULL) {
|
|
char nbuf[MAXPATHLEN];
|
|
|
|
if (dir->d_name[0] == '.' && dir->d_namlen == 1)
|
|
continue;
|
|
if (dir->d_name[0] == '.' && dir->d_name[1] == '.' &&
|
|
dir->d_namlen == 2)
|
|
continue;
|
|
|
|
(void)snprintf(nbuf, sizeof(nbuf), "%s%s%s", dirname,
|
|
trailingslash ? "" : "/", dir->d_name);
|
|
|
|
/*
|
|
* We have to do a stat to ensure it's
|
|
* not a directory or special file.
|
|
*/
|
|
/* XXX: follow RFC959 and filter out non files ? */
|
|
if (simple || (stat(nbuf, &st) == 0 &&
|
|
S_ISREG(st.st_mode))) {
|
|
char *p;
|
|
|
|
if (dout == NULL) {
|
|
dout = dataconn("file list", (off_t)-1,
|
|
"w");
|
|
if (dout == NULL)
|
|
goto out;
|
|
transflag++;
|
|
}
|
|
p = nbuf;
|
|
if (nbuf[0] == '.' && nbuf[1] == '/')
|
|
p = &nbuf[2];
|
|
b = fprintf(dout, "%s%s\n", p,
|
|
type == TYPE_A ? "\r" : "");
|
|
total_bytes += b;
|
|
total_bytes_out += b;
|
|
byte_count += strlen(nbuf) + 1;
|
|
}
|
|
}
|
|
(void) 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)
|
|
(void) fclose(dout);
|
|
data = -1;
|
|
pdata = -1;
|
|
out:
|
|
total_xfers++;
|
|
total_xfers_out++;
|
|
if (p)
|
|
free(p);
|
|
if (freeglob)
|
|
globfree(&gl);
|
|
}
|
|
|
|
char *
|
|
conffilename(s)
|
|
const char *s;
|
|
{
|
|
static char filename[MAXPATHLEN];
|
|
|
|
if (*s == '/')
|
|
strlcpy(filename, s, sizeof(filename));
|
|
else
|
|
(void)snprintf(filename, sizeof(filename), "%s/%s", confdir ,s);
|
|
return (filename);
|
|
}
|
|
|
|
/*
|
|
* logcmd --
|
|
* based on the arguments, syslog a message:
|
|
* if bytes != -1 "<command> <file1> = <bytes> bytes"
|
|
* else if file2 != NULL "<command> <file1> <file2>"
|
|
* else "<command> <file1>"
|
|
* if elapsed != NULL, append "in xxx.yyy seconds"
|
|
* if error != NULL, append ": " + error
|
|
*/
|
|
|
|
void
|
|
logcmd(command, bytes, file1, file2, elapsed, error)
|
|
const char *command;
|
|
off_t bytes;
|
|
const char *file1;
|
|
const char *file2;
|
|
const struct timeval *elapsed;
|
|
const char *error;
|
|
{
|
|
char buf[MAXPATHLEN * 2 + 100], realfile[MAXPATHLEN];
|
|
const char *p;
|
|
size_t len;
|
|
|
|
if (logging <=1)
|
|
return;
|
|
|
|
if ((p = realpath(file1, realfile)) == NULL) {
|
|
#if 0 /* XXX: too noisy */
|
|
syslog(LOG_WARNING, "realpath `%s' failed: %s",
|
|
realfile, strerror(errno));
|
|
#endif
|
|
p = file1;
|
|
}
|
|
len = snprintf(buf, sizeof(buf), "%s %s", command, p);
|
|
|
|
if (bytes != (off_t)-1) {
|
|
len += snprintf(buf + len, sizeof(buf) - len,
|
|
" = %qd byte%s", (qdfmt_t) bytes, PLURAL(bytes));
|
|
} else if (file2 != NULL) {
|
|
if ((p = realpath(file2, realfile)) == NULL) {
|
|
#if 0 /* XXX: too noisy */
|
|
syslog(LOG_WARNING, "realpath `%s' failed: %s",
|
|
realfile, strerror(errno));
|
|
#endif
|
|
p = file2;
|
|
}
|
|
len += snprintf(buf + len, sizeof(buf) - len, " %s", p);
|
|
}
|
|
|
|
if (elapsed != NULL) {
|
|
len += snprintf(buf + len, sizeof(buf) - len,
|
|
" in %ld.%.03d seconds", elapsed->tv_sec,
|
|
(int)(elapsed->tv_usec / 1000));
|
|
}
|
|
|
|
if (error != NULL)
|
|
len += snprintf(buf + len, sizeof(buf) - len, ": %s", error);
|
|
|
|
syslog(LOG_INFO, "%s", buf);
|
|
}
|
|
|
|
char *
|
|
xstrdup(s)
|
|
const char *s;
|
|
{
|
|
char *new = strdup(s);
|
|
|
|
if (new == NULL)
|
|
fatal("Local resource failure: malloc");
|
|
/* NOTREACHED */
|
|
return (new);
|
|
}
|