2164 lines
49 KiB
C
2164 lines
49 KiB
C
/* $NetBSD: ftp.c,v 1.167 2016/10/04 15:06:31 joerg Exp $ */
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/*-
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* Copyright (c) 1996-2009 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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*
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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, 1989, 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. 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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#if 0
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static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94";
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#else
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__RCSID("$NetBSD: ftp.c,v 1.167 2016/10/04 15:06:31 joerg Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/time.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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#include <arpa/inet.h>
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#include <arpa/ftp.h>
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#include <arpa/telnet.h>
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#include <assert.h>
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#include <ctype.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 <netdb.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 <time.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include "ftp_var.h"
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volatile sig_atomic_t abrtflag;
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volatile sig_atomic_t timeoutflag;
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sigjmp_buf ptabort;
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int ptabflg;
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int ptflag = 0;
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char pasv[BUFSIZ]; /* passive port for proxy data connection */
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static int empty(FILE *, FILE *, int);
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__dead static void abort_squared(int);
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struct sockinet {
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union sockunion {
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struct sockaddr_in su_sin;
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#ifdef INET6
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struct sockaddr_in6 su_sin6;
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#endif
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} si_su;
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#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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int si_len;
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#endif
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};
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#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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# define su_len si_len
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#else
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# define su_len si_su.su_sin.sin_len
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#endif
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#define su_family si_su.su_sin.sin_family
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#define su_port si_su.su_sin.sin_port
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struct sockinet myctladdr, hisctladdr, data_addr;
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char *
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hookup(const char *host, const char *port)
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{
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int s = -1, error;
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struct addrinfo hints, *res, *res0;
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static char hostnamebuf[MAXHOSTNAMELEN];
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socklen_t len;
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int on = 1;
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memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
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memset((char *)&myctladdr, 0, sizeof (myctladdr));
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_CANONNAME;
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hints.ai_family = family;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = 0;
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error = getaddrinfo(host, port, &hints, &res0);
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if (error) {
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warnx("Can't lookup `%s:%s': %s", host, port,
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(error == EAI_SYSTEM) ? strerror(errno)
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: gai_strerror(error));
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code = -1;
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return (0);
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}
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if (res0->ai_canonname)
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(void)strlcpy(hostnamebuf, res0->ai_canonname,
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sizeof(hostnamebuf));
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else
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(void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
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hostname = hostnamebuf;
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for (res = res0; res; res = res->ai_next) {
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char hname[NI_MAXHOST], sname[NI_MAXSERV];
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ai_unmapped(res);
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if (getnameinfo(res->ai_addr, res->ai_addrlen,
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hname, sizeof(hname), sname, sizeof(sname),
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NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
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strlcpy(hname, "?", sizeof(hname));
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strlcpy(sname, "?", sizeof(sname));
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}
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if (verbose && res0->ai_next) {
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/* if we have multiple possibilities */
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#ifdef INET6
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if(res->ai_family == AF_INET6) {
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fprintf(ttyout, "Trying [%s]:%s ...\n", hname,
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sname);
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} else {
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#endif
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fprintf(ttyout, "Trying %s:%s ...\n", hname,
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sname);
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#ifdef INET6
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}
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#endif
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}
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s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
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if (s < 0) {
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warn("Can't create socket for connection to `%s:%s'",
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hname, sname);
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continue;
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}
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if (ftp_connect(s, res->ai_addr, res->ai_addrlen,
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verbose || !res->ai_next) < 0) {
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close(s);
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s = -1;
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continue;
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}
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/* finally we got one */
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break;
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}
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if (s < 0) {
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warnx("Can't connect to `%s:%s'", host, port);
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code = -1;
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freeaddrinfo(res0);
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return 0;
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}
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memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
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hisctladdr.su_len = res->ai_addrlen;
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freeaddrinfo(res0);
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res0 = res = NULL;
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len = hisctladdr.su_len;
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if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
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warn("Can't determine my address of connection to `%s:%s'",
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host, port);
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code = -1;
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goto bad;
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}
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myctladdr.su_len = len;
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#ifdef IPTOS_LOWDELAY
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if (hisctladdr.su_family == AF_INET) {
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int tos = IPTOS_LOWDELAY;
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if (setsockopt(s, IPPROTO_IP, IP_TOS,
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(void *)&tos, sizeof(tos)) == -1) {
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DWARN("setsockopt %s (ignored)",
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"IPTOS_LOWDELAY");
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}
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}
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#endif
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cin = fdopen(s, "r");
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cout = fdopen(s, "w");
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if (cin == NULL || cout == NULL) {
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warnx("Can't fdopen socket");
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if (cin)
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(void)fclose(cin);
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if (cout)
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(void)fclose(cout);
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code = -1;
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goto bad;
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}
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if (verbose)
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fprintf(ttyout, "Connected to %s.\n", hostname);
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if (getreply(0) > 2) { /* read startup message from server */
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if (cin)
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(void)fclose(cin);
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if (cout)
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(void)fclose(cout);
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code = -1;
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goto bad;
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}
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if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
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(void *)&on, sizeof(on)) == -1) {
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DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
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}
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return (hostname);
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bad:
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(void)close(s);
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return (NULL);
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}
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void
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cmdabort(int notused)
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{
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int oerrno = errno;
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sigint_raised = 1;
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alarmtimer(0);
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if (fromatty)
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write(fileno(ttyout), "\n", 1);
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abrtflag++;
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if (ptflag)
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siglongjmp(ptabort, 1);
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errno = oerrno;
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}
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void
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cmdtimeout(int notused)
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{
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int oerrno = errno;
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alarmtimer(0);
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if (fromatty)
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write(fileno(ttyout), "\n", 1);
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timeoutflag++;
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if (ptflag)
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siglongjmp(ptabort, 1);
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errno = oerrno;
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}
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/*VARARGS*/
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int
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command(const char *fmt, ...)
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{
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va_list ap;
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int r;
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sigfunc oldsigint;
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#ifndef NO_DEBUG
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if (ftp_debug) {
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fputs("---> ", ttyout);
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va_start(ap, fmt);
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if (strncmp("PASS ", fmt, 5) == 0)
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fputs("PASS XXXX", ttyout);
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else if (strncmp("ACCT ", fmt, 5) == 0)
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fputs("ACCT XXXX", ttyout);
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else
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vfprintf(ttyout, fmt, ap);
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va_end(ap);
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putc('\n', ttyout);
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}
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#endif
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if (cout == NULL) {
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warnx("No control connection for command");
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code = -1;
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return (0);
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}
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abrtflag = 0;
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oldsigint = xsignal(SIGINT, cmdabort);
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va_start(ap, fmt);
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vfprintf(cout, fmt, ap);
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va_end(ap);
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fputs("\r\n", cout);
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(void)fflush(cout);
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cpend = 1;
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r = getreply(!strcmp(fmt, "QUIT"));
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if (abrtflag && oldsigint != SIG_IGN)
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(*oldsigint)(SIGINT);
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(void)xsignal(SIGINT, oldsigint);
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return (r);
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}
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static const char *m421[] = {
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"remote server timed out. Connection closed",
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"user interrupt. Connection closed",
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"remote server has closed connection",
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};
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int
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getreply(int expecteof)
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{
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char current_line[BUFSIZ]; /* last line of previous reply */
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int c, n, lineno;
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int dig;
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int originalcode = 0, continuation = 0;
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sigfunc oldsigint, oldsigalrm;
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int pflag = 0;
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char *cp, *pt = pasv;
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abrtflag = 0;
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timeoutflag = 0;
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oldsigint = xsignal(SIGINT, cmdabort);
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oldsigalrm = xsignal(SIGALRM, cmdtimeout);
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for (lineno = 0 ;; lineno++) {
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dig = n = code = 0;
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cp = current_line;
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while (alarmtimer(quit_time ? quit_time : 60),
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((c = getc(cin)) != '\n')) {
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if (c == IAC) { /* handle telnet commands */
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switch (c = getc(cin)) {
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case WILL:
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case WONT:
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c = getc(cin);
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fprintf(cout, "%c%c%c", IAC, DONT, c);
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(void)fflush(cout);
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break;
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case DO:
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case DONT:
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c = getc(cin);
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fprintf(cout, "%c%c%c", IAC, WONT, c);
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(void)fflush(cout);
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break;
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default:
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break;
|
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}
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continue;
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}
|
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dig++;
|
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if (c == EOF) {
|
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/*
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* these will get trashed by pswitch()
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* in lostpeer()
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*/
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int reply_timeoutflag = timeoutflag;
|
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int reply_abrtflag = abrtflag;
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|
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alarmtimer(0);
|
|
if (expecteof && feof(cin)) {
|
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(void)xsignal(SIGINT, oldsigint);
|
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(void)xsignal(SIGALRM, oldsigalrm);
|
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code = 221;
|
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return (0);
|
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}
|
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cpend = 0;
|
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lostpeer(0);
|
|
if (verbose) {
|
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size_t midx;
|
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if (reply_timeoutflag)
|
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midx = 0;
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else if (reply_abrtflag)
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midx = 1;
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else
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midx = 2;
|
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(void)fprintf(ttyout,
|
|
"421 Service not available, %s.\n", m421[midx]);
|
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(void)fflush(ttyout);
|
|
}
|
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code = 421;
|
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(void)xsignal(SIGINT, oldsigint);
|
|
(void)xsignal(SIGALRM, oldsigalrm);
|
|
return (4);
|
|
}
|
|
if (c != '\r' && (verbose > 0 ||
|
|
((verbose > -1 && n == '5' && dig > 4) &&
|
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(((!n && c < '5') || (n && n < '5'))
|
|
|| !retry_connect)))) {
|
|
if (proxflag &&
|
|
(dig == 1 || (dig == 5 && verbose == 0)))
|
|
fprintf(ttyout, "%s:", hostname);
|
|
(void)putc(c, ttyout);
|
|
}
|
|
if (dig < 4 && isdigit(c))
|
|
code = code * 10 + (c - '0');
|
|
if (!pflag && (code == 227 || code == 228))
|
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pflag = 1;
|
|
else if (!pflag && code == 229)
|
|
pflag = 100;
|
|
if (dig > 4 && pflag == 1 && isdigit(c))
|
|
pflag = 2;
|
|
if (pflag == 2) {
|
|
if (c != '\r' && c != ')') {
|
|
if (pt < &pasv[sizeof(pasv) - 1])
|
|
*pt++ = c;
|
|
} else {
|
|
*pt = '\0';
|
|
pflag = 3;
|
|
}
|
|
}
|
|
if (pflag == 100 && c == '(')
|
|
pflag = 2;
|
|
if (dig == 4 && c == '-') {
|
|
if (continuation)
|
|
code = 0;
|
|
continuation++;
|
|
}
|
|
if (n == 0)
|
|
n = c;
|
|
if (cp < ¤t_line[sizeof(current_line) - 1])
|
|
*cp++ = c;
|
|
}
|
|
if (verbose > 0 || ((verbose > -1 && n == '5') &&
|
|
(n < '5' || !retry_connect))) {
|
|
(void)putc(c, ttyout);
|
|
(void)fflush(ttyout);
|
|
}
|
|
if (cp[-1] == '\r')
|
|
cp[-1] = '\0';
|
|
*cp = '\0';
|
|
if (lineno == 0)
|
|
(void)strlcpy(reply_string, current_line,
|
|
sizeof(reply_string));
|
|
if (lineno > 0 && code == 0 && reply_callback != NULL)
|
|
(*reply_callback)(current_line);
|
|
if (continuation && code != originalcode) {
|
|
if (originalcode == 0)
|
|
originalcode = code;
|
|
continue;
|
|
}
|
|
if (n != '1')
|
|
cpend = 0;
|
|
alarmtimer(0);
|
|
(void)xsignal(SIGINT, oldsigint);
|
|
(void)xsignal(SIGALRM, oldsigalrm);
|
|
if (code == 421 || originalcode == 421)
|
|
lostpeer(0);
|
|
if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
|
|
(*oldsigint)(SIGINT);
|
|
if (timeoutflag && oldsigalrm != cmdtimeout &&
|
|
oldsigalrm != SIG_IGN)
|
|
(*oldsigalrm)(SIGINT);
|
|
return (n - '0');
|
|
}
|
|
}
|
|
|
|
static int
|
|
empty(FILE *ecin, FILE *din, int sec)
|
|
{
|
|
int nr, nfd;
|
|
struct pollfd pfd[2];
|
|
|
|
nfd = 0;
|
|
if (ecin) {
|
|
pfd[nfd].fd = fileno(ecin);
|
|
pfd[nfd++].events = POLLIN;
|
|
}
|
|
|
|
if (din) {
|
|
pfd[nfd].fd = fileno(din);
|
|
pfd[nfd++].events = POLLIN;
|
|
}
|
|
|
|
if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
|
|
return nr;
|
|
|
|
nr = 0;
|
|
nfd = 0;
|
|
if (ecin)
|
|
nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
|
|
if (din)
|
|
nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
|
|
return nr;
|
|
}
|
|
|
|
sigjmp_buf xferabort;
|
|
|
|
__dead static void
|
|
abortxfer(int notused)
|
|
{
|
|
char msgbuf[100];
|
|
size_t len;
|
|
|
|
sigint_raised = 1;
|
|
alarmtimer(0);
|
|
mflag = 0;
|
|
abrtflag = 0;
|
|
switch (direction[0]) {
|
|
case 'r':
|
|
strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
|
|
break;
|
|
case 's':
|
|
strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
|
|
break;
|
|
default:
|
|
errx(1, "abortxfer: unknown direction `%s'", direction);
|
|
}
|
|
len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
|
|
sizeof(msgbuf));
|
|
write(fileno(ttyout), msgbuf, len);
|
|
siglongjmp(xferabort, 1);
|
|
}
|
|
|
|
/*
|
|
* Read data from infd & write to outfd, using buf/bufsize as the temporary
|
|
* buffer, dealing with short writes.
|
|
* If rate_limit != 0, rate-limit the transfer.
|
|
* If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
|
|
* Updates global variables: bytes.
|
|
* Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
|
|
* In the case of error, errno contains the appropriate error code.
|
|
*/
|
|
static int
|
|
copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
|
|
int rate_limit, int hash_interval)
|
|
{
|
|
volatile off_t hashc;
|
|
ssize_t inc, outc;
|
|
char *bufp;
|
|
struct timeval tvthen, tvnow, tvdiff;
|
|
off_t bufrem, bufchunk;
|
|
int serr;
|
|
|
|
hashc = hash_interval;
|
|
if (rate_limit)
|
|
bufchunk = rate_limit;
|
|
else
|
|
bufchunk = bufsize;
|
|
|
|
while (1) {
|
|
if (rate_limit) {
|
|
(void)gettimeofday(&tvthen, NULL);
|
|
}
|
|
errno = 0;
|
|
inc = outc = 0;
|
|
/* copy bufchunk at a time */
|
|
bufrem = bufchunk;
|
|
while (bufrem > 0) {
|
|
inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
|
|
if (inc <= 0)
|
|
goto copy_done;
|
|
bytes += inc;
|
|
bufrem -= inc;
|
|
bufp = buf;
|
|
while (inc > 0) {
|
|
outc = write(outfd, bufp, inc);
|
|
if (outc < 0)
|
|
goto copy_done;
|
|
inc -= outc;
|
|
bufp += outc;
|
|
}
|
|
if (hash_interval) {
|
|
while (bytes >= hashc) {
|
|
(void)putc('#', ttyout);
|
|
hashc += hash_interval;
|
|
}
|
|
(void)fflush(ttyout);
|
|
}
|
|
}
|
|
if (rate_limit) { /* rate limited; wait if necessary */
|
|
while (1) {
|
|
(void)gettimeofday(&tvnow, NULL);
|
|
timersub(&tvnow, &tvthen, &tvdiff);
|
|
if (tvdiff.tv_sec > 0)
|
|
break;
|
|
usleep(1000000 - tvdiff.tv_usec);
|
|
}
|
|
}
|
|
}
|
|
|
|
copy_done:
|
|
serr = errno;
|
|
if (hash_interval && bytes > 0) {
|
|
if (bytes < hash_interval)
|
|
(void)putc('#', ttyout);
|
|
(void)putc('\n', ttyout);
|
|
(void)fflush(ttyout);
|
|
}
|
|
errno = serr;
|
|
if (inc == -1)
|
|
return 1;
|
|
if (outc == -1)
|
|
return 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
sendrequest(const char *cmd, const char *local, const char *remote,
|
|
int printnames)
|
|
{
|
|
struct stat st;
|
|
int c;
|
|
FILE *volatile fin;
|
|
FILE *volatile dout;
|
|
int (*volatile closefunc)(FILE *);
|
|
sigfunc volatile oldintr;
|
|
sigfunc volatile oldintp;
|
|
off_t volatile hashbytes;
|
|
int hash_interval;
|
|
const char *lmode;
|
|
static size_t bufsize;
|
|
static char *buf;
|
|
int oprogress;
|
|
|
|
hashbytes = mark;
|
|
direction = "sent";
|
|
dout = NULL;
|
|
bytes = 0;
|
|
filesize = -1;
|
|
oprogress = progress;
|
|
if (verbose && printnames) {
|
|
if (*local != '-')
|
|
fprintf(ttyout, "local: %s ", local);
|
|
if (remote)
|
|
fprintf(ttyout, "remote: %s\n", remote);
|
|
}
|
|
if (proxy) {
|
|
proxtrans(cmd, local, remote);
|
|
return;
|
|
}
|
|
if (curtype != type)
|
|
changetype(type, 0);
|
|
closefunc = NULL;
|
|
oldintr = NULL;
|
|
oldintp = NULL;
|
|
lmode = "w";
|
|
if (sigsetjmp(xferabort, 1)) {
|
|
while (cpend)
|
|
(void)getreply(0);
|
|
code = -1;
|
|
goto cleanupsend;
|
|
}
|
|
(void)xsignal(SIGQUIT, psummary);
|
|
oldintr = xsignal(SIGINT, abortxfer);
|
|
if (strcmp(local, "-") == 0) {
|
|
fin = stdin;
|
|
progress = 0;
|
|
} else if (*local == '|') {
|
|
oldintp = xsignal(SIGPIPE, SIG_IGN);
|
|
fin = popen(local + 1, "r");
|
|
if (fin == NULL) {
|
|
warn("Can't execute `%s'", local + 1);
|
|
code = -1;
|
|
goto cleanupsend;
|
|
}
|
|
progress = 0;
|
|
closefunc = pclose;
|
|
} else {
|
|
fin = fopen(local, "r");
|
|
if (fin == NULL) {
|
|
warn("Can't open `%s'", local);
|
|
code = -1;
|
|
goto cleanupsend;
|
|
}
|
|
closefunc = fclose;
|
|
if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
|
|
fprintf(ttyout, "%s: not a plain file.\n", local);
|
|
code = -1;
|
|
goto cleanupsend;
|
|
}
|
|
filesize = st.st_size;
|
|
}
|
|
if (initconn()) {
|
|
code = -1;
|
|
goto cleanupsend;
|
|
}
|
|
if (sigsetjmp(xferabort, 1))
|
|
goto abort;
|
|
|
|
if (restart_point &&
|
|
(strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
|
|
int rc;
|
|
|
|
rc = -1;
|
|
switch (curtype) {
|
|
case TYPE_A:
|
|
rc = fseeko(fin, restart_point, SEEK_SET);
|
|
break;
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
rc = lseek(fileno(fin), restart_point, SEEK_SET);
|
|
break;
|
|
}
|
|
if (rc < 0) {
|
|
warn("Can't seek to restart `%s'", local);
|
|
goto cleanupsend;
|
|
}
|
|
if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
|
|
goto cleanupsend;
|
|
lmode = "r+";
|
|
}
|
|
if (remote) {
|
|
if (command("%s %s", cmd, remote) != PRELIM)
|
|
goto cleanupsend;
|
|
} else {
|
|
if (command("%s", cmd) != PRELIM)
|
|
goto cleanupsend;
|
|
}
|
|
dirchange = 1;
|
|
dout = dataconn(lmode);
|
|
if (dout == NULL)
|
|
goto abort;
|
|
|
|
assert(sndbuf_size > 0);
|
|
if ((size_t)sndbuf_size > bufsize) {
|
|
if (buf)
|
|
(void)free(buf);
|
|
bufsize = sndbuf_size;
|
|
buf = ftp_malloc(bufsize);
|
|
}
|
|
|
|
progressmeter(-1);
|
|
oldintp = xsignal(SIGPIPE, SIG_IGN);
|
|
hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
|
|
|
|
switch (curtype) {
|
|
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
|
|
rate_put, hash_interval);
|
|
if (c == 1) {
|
|
warn("Reading `%s'", local);
|
|
} else if (c == 2) {
|
|
if (errno != EPIPE)
|
|
warn("Writing to network");
|
|
bytes = -1;
|
|
}
|
|
break;
|
|
|
|
case TYPE_A:
|
|
while ((c = getc(fin)) != EOF) {
|
|
if (c == '\n') {
|
|
while (hash_interval && bytes >= hashbytes) {
|
|
(void)putc('#', ttyout);
|
|
(void)fflush(ttyout);
|
|
hashbytes += mark;
|
|
}
|
|
if (ferror(dout))
|
|
break;
|
|
(void)putc('\r', dout);
|
|
bytes++;
|
|
}
|
|
(void)putc(c, dout);
|
|
bytes++;
|
|
#if 0 /* this violates RFC 959 */
|
|
if (c == '\r') {
|
|
(void)putc('\0', dout);
|
|
bytes++;
|
|
}
|
|
#endif
|
|
}
|
|
if (hash_interval) {
|
|
if (bytes < hashbytes)
|
|
(void)putc('#', ttyout);
|
|
(void)putc('\n', ttyout);
|
|
}
|
|
if (ferror(fin))
|
|
warn("Reading `%s'", local);
|
|
if (ferror(dout)) {
|
|
if (errno != EPIPE)
|
|
warn("Writing to network");
|
|
bytes = -1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
progressmeter(1);
|
|
if (closefunc != NULL) {
|
|
(*closefunc)(fin);
|
|
fin = NULL;
|
|
}
|
|
(void)fclose(dout);
|
|
dout = NULL;
|
|
(void)getreply(0);
|
|
if (bytes > 0)
|
|
ptransfer(0);
|
|
goto cleanupsend;
|
|
|
|
abort:
|
|
(void)xsignal(SIGINT, oldintr);
|
|
oldintr = NULL;
|
|
if (!cpend) {
|
|
code = -1;
|
|
goto cleanupsend;
|
|
}
|
|
if (data >= 0) {
|
|
(void)close(data);
|
|
data = -1;
|
|
}
|
|
if (dout) {
|
|
(void)fclose(dout);
|
|
dout = NULL;
|
|
}
|
|
(void)getreply(0);
|
|
code = -1;
|
|
if (bytes > 0)
|
|
ptransfer(0);
|
|
|
|
cleanupsend:
|
|
if (oldintr)
|
|
(void)xsignal(SIGINT, oldintr);
|
|
if (oldintp)
|
|
(void)xsignal(SIGPIPE, oldintp);
|
|
if (data >= 0) {
|
|
(void)close(data);
|
|
data = -1;
|
|
}
|
|
if (closefunc != NULL && fin != NULL)
|
|
(*closefunc)(fin);
|
|
if (dout)
|
|
(void)fclose(dout);
|
|
progress = oprogress;
|
|
restart_point = 0;
|
|
bytes = 0;
|
|
}
|
|
|
|
void
|
|
recvrequest(const char *cmd, const char *volatile local, const char *remote,
|
|
const char *lmode, int printnames, int ignorespecial)
|
|
{
|
|
FILE *volatile fout;
|
|
FILE *volatile din;
|
|
int (*volatile closefunc)(FILE *);
|
|
sigfunc volatile oldintr;
|
|
sigfunc volatile oldintp;
|
|
int c, d;
|
|
int volatile is_retr;
|
|
int volatile tcrflag;
|
|
int volatile bare_lfs;
|
|
static size_t bufsize;
|
|
static char *buf;
|
|
off_t volatile hashbytes;
|
|
int hash_interval;
|
|
struct stat st;
|
|
time_t mtime;
|
|
struct timeval tval[2];
|
|
int oprogress;
|
|
int opreserve;
|
|
|
|
fout = NULL;
|
|
din = NULL;
|
|
hashbytes = mark;
|
|
direction = "received";
|
|
bytes = 0;
|
|
bare_lfs = 0;
|
|
filesize = -1;
|
|
oprogress = progress;
|
|
opreserve = preserve;
|
|
is_retr = (strcmp(cmd, "RETR") == 0);
|
|
if (is_retr && verbose && printnames) {
|
|
if (ignorespecial || *local != '-')
|
|
fprintf(ttyout, "local: %s ", local);
|
|
if (remote)
|
|
fprintf(ttyout, "remote: %s\n", remote);
|
|
}
|
|
if (proxy && is_retr) {
|
|
proxtrans(cmd, local, remote);
|
|
return;
|
|
}
|
|
closefunc = NULL;
|
|
oldintr = NULL;
|
|
oldintp = NULL;
|
|
tcrflag = !crflag && is_retr;
|
|
if (sigsetjmp(xferabort, 1)) {
|
|
while (cpend)
|
|
(void)getreply(0);
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
(void)xsignal(SIGQUIT, psummary);
|
|
oldintr = xsignal(SIGINT, abortxfer);
|
|
if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
|
|
if (access(local, W_OK) < 0) {
|
|
char *dir = strrchr(local, '/');
|
|
|
|
if (errno != ENOENT && errno != EACCES) {
|
|
warn("Can't access `%s'", local);
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
if (dir != NULL)
|
|
*dir = 0;
|
|
d = access(dir == local ? "/" :
|
|
dir ? local : ".", W_OK);
|
|
if (dir != NULL)
|
|
*dir = '/';
|
|
if (d < 0) {
|
|
warn("Can't access `%s'", local);
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
if (!runique && errno == EACCES &&
|
|
chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
|
|
warn("Can't chmod `%s'", local);
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
if (runique && errno == EACCES &&
|
|
(local = gunique(local)) == NULL) {
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
}
|
|
else if (runique && (local = gunique(local)) == NULL) {
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
}
|
|
if (!is_retr) {
|
|
if (curtype != TYPE_A)
|
|
changetype(TYPE_A, 0);
|
|
} else {
|
|
if (curtype != type)
|
|
changetype(type, 0);
|
|
filesize = remotesize(remote, 0);
|
|
if (code == 421 || code == -1)
|
|
goto cleanuprecv;
|
|
}
|
|
if (initconn()) {
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
if (sigsetjmp(xferabort, 1))
|
|
goto abort;
|
|
if (is_retr && restart_point &&
|
|
command("REST " LLF, (LLT) restart_point) != CONTINUE)
|
|
goto cleanuprecv;
|
|
if (! EMPTYSTRING(remote)) {
|
|
if (command("%s %s", cmd, remote) != PRELIM)
|
|
goto cleanuprecv;
|
|
} else {
|
|
if (command("%s", cmd) != PRELIM)
|
|
goto cleanuprecv;
|
|
}
|
|
din = dataconn("r");
|
|
if (din == NULL)
|
|
goto abort;
|
|
if (!ignorespecial && strcmp(local, "-") == 0) {
|
|
fout = stdout;
|
|
progress = 0;
|
|
preserve = 0;
|
|
} else if (!ignorespecial && *local == '|') {
|
|
oldintp = xsignal(SIGPIPE, SIG_IGN);
|
|
fout = popen(local + 1, "w");
|
|
if (fout == NULL) {
|
|
warn("Can't execute `%s'", local+1);
|
|
goto abort;
|
|
}
|
|
progress = 0;
|
|
preserve = 0;
|
|
closefunc = pclose;
|
|
} else {
|
|
fout = fopen(local, lmode);
|
|
if (fout == NULL) {
|
|
warn("Can't open `%s'", local);
|
|
goto abort;
|
|
}
|
|
closefunc = fclose;
|
|
}
|
|
|
|
if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
|
|
progress = 0;
|
|
preserve = 0;
|
|
}
|
|
assert(rcvbuf_size > 0);
|
|
if ((size_t)rcvbuf_size > bufsize) {
|
|
if (buf)
|
|
(void)free(buf);
|
|
bufsize = rcvbuf_size;
|
|
buf = ftp_malloc(bufsize);
|
|
}
|
|
|
|
progressmeter(-1);
|
|
hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
|
|
|
|
switch (curtype) {
|
|
|
|
case TYPE_I:
|
|
case TYPE_L:
|
|
if (is_retr && restart_point &&
|
|
lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
|
|
warn("Can't seek to restart `%s'", local);
|
|
goto cleanuprecv;
|
|
}
|
|
c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
|
|
rate_get, hash_interval);
|
|
if (c == 1) {
|
|
if (errno != EPIPE)
|
|
warn("Reading from network");
|
|
bytes = -1;
|
|
} else if (c == 2) {
|
|
warn("Writing `%s'", local);
|
|
}
|
|
break;
|
|
|
|
case TYPE_A:
|
|
if (is_retr && restart_point) {
|
|
int ch;
|
|
off_t i;
|
|
|
|
if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
|
|
goto done;
|
|
for (i = 0; i++ < restart_point;) {
|
|
if ((ch = getc(fout)) == EOF)
|
|
goto done;
|
|
if (ch == '\n')
|
|
i++;
|
|
}
|
|
if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
|
|
done:
|
|
warn("Can't seek to restart `%s'", local);
|
|
goto cleanuprecv;
|
|
}
|
|
}
|
|
while ((c = getc(din)) != EOF) {
|
|
if (c == '\n')
|
|
bare_lfs++;
|
|
while (c == '\r') {
|
|
while (hash_interval && bytes >= hashbytes) {
|
|
(void)putc('#', ttyout);
|
|
(void)fflush(ttyout);
|
|
hashbytes += mark;
|
|
}
|
|
bytes++;
|
|
if ((c = getc(din)) != '\n' || tcrflag) {
|
|
if (ferror(fout))
|
|
goto break2;
|
|
(void)putc('\r', fout);
|
|
if (c == '\0') {
|
|
bytes++;
|
|
goto contin2;
|
|
}
|
|
if (c == EOF)
|
|
goto contin2;
|
|
}
|
|
}
|
|
(void)putc(c, fout);
|
|
bytes++;
|
|
contin2: ;
|
|
}
|
|
break2:
|
|
if (hash_interval) {
|
|
if (bytes < hashbytes)
|
|
(void)putc('#', ttyout);
|
|
(void)putc('\n', ttyout);
|
|
}
|
|
if (ferror(din)) {
|
|
if (errno != EPIPE)
|
|
warn("Reading from network");
|
|
bytes = -1;
|
|
}
|
|
if (ferror(fout))
|
|
warn("Writing `%s'", local);
|
|
break;
|
|
}
|
|
|
|
progressmeter(1);
|
|
if (closefunc != NULL) {
|
|
(*closefunc)(fout);
|
|
fout = NULL;
|
|
}
|
|
(void)fclose(din);
|
|
din = NULL;
|
|
(void)getreply(0);
|
|
if (bare_lfs) {
|
|
fprintf(ttyout,
|
|
"WARNING! %d bare linefeeds received in ASCII mode.\n",
|
|
bare_lfs);
|
|
fputs("File may not have transferred correctly.\n", ttyout);
|
|
}
|
|
if (bytes >= 0 && is_retr) {
|
|
if (bytes > 0)
|
|
ptransfer(0);
|
|
if (preserve && (closefunc == fclose)) {
|
|
mtime = remotemodtime(remote, 0);
|
|
if (mtime != -1) {
|
|
(void)gettimeofday(&tval[0], NULL);
|
|
tval[1].tv_sec = mtime;
|
|
tval[1].tv_usec = 0;
|
|
if (utimes(local, tval) == -1) {
|
|
fprintf(ttyout,
|
|
"Can't change modification time on %s to %s",
|
|
local,
|
|
rfc2822time(localtime(&mtime)));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
goto cleanuprecv;
|
|
|
|
abort:
|
|
/*
|
|
* abort using RFC 959 recommended IP,SYNC sequence
|
|
*/
|
|
if (! sigsetjmp(xferabort, 1)) {
|
|
/* this is the first call */
|
|
(void)xsignal(SIGINT, abort_squared);
|
|
if (!cpend) {
|
|
code = -1;
|
|
goto cleanuprecv;
|
|
}
|
|
abort_remote(din);
|
|
}
|
|
code = -1;
|
|
if (bytes > 0)
|
|
ptransfer(0);
|
|
|
|
cleanuprecv:
|
|
if (oldintr)
|
|
(void)xsignal(SIGINT, oldintr);
|
|
if (oldintp)
|
|
(void)xsignal(SIGPIPE, oldintp);
|
|
if (data >= 0) {
|
|
(void)close(data);
|
|
data = -1;
|
|
}
|
|
if (closefunc != NULL && fout != NULL)
|
|
(*closefunc)(fout);
|
|
if (din)
|
|
(void)fclose(din);
|
|
progress = oprogress;
|
|
preserve = opreserve;
|
|
bytes = 0;
|
|
}
|
|
|
|
/*
|
|
* Need to start a listen on the data channel before we send the command,
|
|
* otherwise the server's connect may fail.
|
|
*/
|
|
int
|
|
initconn(void)
|
|
{
|
|
char *p, *a;
|
|
int result, tmpno = 0;
|
|
int on = 1;
|
|
int error;
|
|
unsigned int addr[16], port[2];
|
|
unsigned int af, hal, pal;
|
|
socklen_t len;
|
|
const char *pasvcmd = NULL;
|
|
int overbose;
|
|
|
|
#ifdef INET6
|
|
#ifndef NO_DEBUG
|
|
if (myctladdr.su_family == AF_INET6 && ftp_debug &&
|
|
(IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
|
|
IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
|
|
warnx("Use of scoped addresses can be troublesome");
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
reinit:
|
|
if (passivemode) {
|
|
data_addr = myctladdr;
|
|
data = socket(data_addr.su_family, SOCK_STREAM, 0);
|
|
if (data < 0) {
|
|
warn("Can't create socket for data connection");
|
|
return (1);
|
|
}
|
|
if ((options & SO_DEBUG) &&
|
|
setsockopt(data, SOL_SOCKET, SO_DEBUG,
|
|
(void *)&on, sizeof(on)) == -1) {
|
|
DWARN("setsockopt %s (ignored)", "SO_DEBUG");
|
|
}
|
|
result = COMPLETE + 1;
|
|
switch (data_addr.su_family) {
|
|
case AF_INET:
|
|
if (epsv4 && !epsv4bad) {
|
|
pasvcmd = "EPSV";
|
|
overbose = verbose;
|
|
if (ftp_debug == 0)
|
|
verbose = -1;
|
|
result = command("EPSV");
|
|
verbose = overbose;
|
|
if (verbose > 0 &&
|
|
(result == COMPLETE || !connected))
|
|
fprintf(ttyout, "%s\n", reply_string);
|
|
if (!connected)
|
|
return (1);
|
|
/*
|
|
* this code is to be friendly with broken
|
|
* BSDI ftpd
|
|
*/
|
|
if (code / 10 == 22 && code != 229) {
|
|
fputs(
|
|
"wrong server: return code must be 229\n",
|
|
ttyout);
|
|
result = COMPLETE + 1;
|
|
}
|
|
if (result != COMPLETE) {
|
|
epsv4bad = 1;
|
|
DPRINTF("disabling epsv4 for this "
|
|
"connection\n");
|
|
}
|
|
}
|
|
if (result != COMPLETE) {
|
|
pasvcmd = "PASV";
|
|
result = command("PASV");
|
|
if (!connected)
|
|
return (1);
|
|
}
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (epsv6 && !epsv6bad) {
|
|
pasvcmd = "EPSV";
|
|
overbose = verbose;
|
|
if (ftp_debug == 0)
|
|
verbose = -1;
|
|
result = command("EPSV");
|
|
verbose = overbose;
|
|
if (verbose > 0 &&
|
|
(result == COMPLETE || !connected))
|
|
fprintf(ttyout, "%s\n", reply_string);
|
|
if (!connected)
|
|
return (1);
|
|
/*
|
|
* this code is to be friendly with
|
|
* broken BSDI ftpd
|
|
*/
|
|
if (code / 10 == 22 && code != 229) {
|
|
fputs(
|
|
"wrong server: return code must be 229\n",
|
|
ttyout);
|
|
result = COMPLETE + 1;
|
|
}
|
|
if (result != COMPLETE) {
|
|
epsv6bad = 1;
|
|
DPRINTF("disabling epsv6 for this "
|
|
"connection\n");
|
|
}
|
|
}
|
|
if (result != COMPLETE) {
|
|
pasvcmd = "LPSV";
|
|
result = command("LPSV");
|
|
}
|
|
if (!connected)
|
|
return (1);
|
|
break;
|
|
#endif
|
|
default:
|
|
result = COMPLETE + 1;
|
|
break;
|
|
}
|
|
if (result != COMPLETE) {
|
|
if (activefallback) {
|
|
(void)close(data);
|
|
data = -1;
|
|
passivemode = 0;
|
|
#if 0
|
|
activefallback = 0;
|
|
#endif
|
|
goto reinit;
|
|
}
|
|
fputs("Passive mode refused.\n", ttyout);
|
|
goto bad;
|
|
}
|
|
|
|
#define pack2(var, off) \
|
|
(((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
|
|
#define pack4(var, off) \
|
|
(((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
|
|
((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
|
|
#define UC(b) (((int)b)&0xff)
|
|
|
|
/*
|
|
* What we've got at this point is a string of comma separated
|
|
* one-byte unsigned integer values, separated by commas.
|
|
*/
|
|
if (strcmp(pasvcmd, "PASV") == 0) {
|
|
if (data_addr.su_family != AF_INET) {
|
|
fputs(
|
|
"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
if (code / 10 == 22 && code != 227) {
|
|
fputs("wrong server: return code must be 227\n",
|
|
ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
|
|
&addr[0], &addr[1], &addr[2], &addr[3],
|
|
&port[0], &port[1]);
|
|
if (error != 6) {
|
|
fputs(
|
|
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
error = 0;
|
|
memset(&data_addr, 0, sizeof(data_addr));
|
|
data_addr.su_family = AF_INET;
|
|
data_addr.su_len = sizeof(struct sockaddr_in);
|
|
data_addr.si_su.su_sin.sin_addr.s_addr =
|
|
htonl(pack4(addr, 0));
|
|
data_addr.su_port = htons(pack2(port, 0));
|
|
} else if (strcmp(pasvcmd, "LPSV") == 0) {
|
|
if (code / 10 == 22 && code != 228) {
|
|
fputs("wrong server: return code must be 228\n",
|
|
ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
switch (data_addr.su_family) {
|
|
case AF_INET:
|
|
error = sscanf(pasv,
|
|
"%u,%u,%u,%u,%u,%u,%u,%u,%u",
|
|
&af, &hal,
|
|
&addr[0], &addr[1], &addr[2], &addr[3],
|
|
&pal, &port[0], &port[1]);
|
|
if (error != 9) {
|
|
fputs(
|
|
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
if (af != 4 || hal != 4 || pal != 2) {
|
|
fputs(
|
|
"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
|
|
error = 0;
|
|
memset(&data_addr, 0, sizeof(data_addr));
|
|
data_addr.su_family = AF_INET;
|
|
data_addr.su_len = sizeof(struct sockaddr_in);
|
|
data_addr.si_su.su_sin.sin_addr.s_addr =
|
|
htonl(pack4(addr, 0));
|
|
data_addr.su_port = htons(pack2(port, 0));
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
error = sscanf(pasv,
|
|
"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
|
|
&af, &hal,
|
|
&addr[0], &addr[1], &addr[2], &addr[3],
|
|
&addr[4], &addr[5], &addr[6], &addr[7],
|
|
&addr[8], &addr[9], &addr[10],
|
|
&addr[11], &addr[12], &addr[13],
|
|
&addr[14], &addr[15],
|
|
&pal, &port[0], &port[1]);
|
|
if (error != 21) {
|
|
fputs(
|
|
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
if (af != 6 || hal != 16 || pal != 2) {
|
|
fputs(
|
|
"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
|
|
error = 0;
|
|
memset(&data_addr, 0, sizeof(data_addr));
|
|
data_addr.su_family = AF_INET6;
|
|
data_addr.su_len = sizeof(struct sockaddr_in6);
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < sizeof(struct in6_addr); i++) {
|
|
data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
|
|
UC(addr[i]);
|
|
}
|
|
}
|
|
data_addr.su_port = htons(pack2(port, 0));
|
|
break;
|
|
#endif
|
|
default:
|
|
error = 1;
|
|
}
|
|
} else if (strcmp(pasvcmd, "EPSV") == 0) {
|
|
char delim[4];
|
|
|
|
port[0] = 0;
|
|
if (code / 10 == 22 && code != 229) {
|
|
fputs("wrong server: return code must be 229\n",
|
|
ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
|
|
&delim[1], &delim[2], &port[1],
|
|
&delim[3]) != 5) {
|
|
fputs("parse error!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
if (delim[0] != delim[1] || delim[0] != delim[2]
|
|
|| delim[0] != delim[3]) {
|
|
fputs("parse error!\n", ttyout);
|
|
error = 1;
|
|
goto bad;
|
|
}
|
|
data_addr = hisctladdr;
|
|
data_addr.su_port = htons(port[1]);
|
|
} else
|
|
goto bad;
|
|
|
|
if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
|
|
data_addr.su_len, 1) < 0) {
|
|
if (activefallback) {
|
|
(void)close(data);
|
|
data = -1;
|
|
passivemode = 0;
|
|
#if 0
|
|
activefallback = 0;
|
|
#endif
|
|
goto reinit;
|
|
}
|
|
goto bad;
|
|
}
|
|
#ifdef IPTOS_THROUGHPUT
|
|
if (data_addr.su_family == AF_INET) {
|
|
on = IPTOS_THROUGHPUT;
|
|
if (setsockopt(data, IPPROTO_IP, IP_TOS,
|
|
(void *)&on, sizeof(on)) == -1) {
|
|
DWARN("setsockopt %s (ignored)",
|
|
"IPTOS_THROUGHPUT");
|
|
}
|
|
}
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
noport:
|
|
data_addr = myctladdr;
|
|
if (sendport)
|
|
data_addr.su_port = 0; /* let system pick one */
|
|
if (data != -1)
|
|
(void)close(data);
|
|
data = socket(data_addr.su_family, SOCK_STREAM, 0);
|
|
if (data < 0) {
|
|
warn("Can't create socket for data connection");
|
|
if (tmpno)
|
|
sendport = 1;
|
|
return (1);
|
|
}
|
|
if (!sendport)
|
|
if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
|
|
(void *)&on, sizeof(on)) == -1) {
|
|
warn("Can't set SO_REUSEADDR on data connection");
|
|
goto bad;
|
|
}
|
|
if (bind(data, (struct sockaddr *)&data_addr.si_su,
|
|
data_addr.su_len) < 0) {
|
|
warn("Can't bind for data connection");
|
|
goto bad;
|
|
}
|
|
if ((options & SO_DEBUG) &&
|
|
setsockopt(data, SOL_SOCKET, SO_DEBUG,
|
|
(void *)&on, sizeof(on)) == -1) {
|
|
DWARN("setsockopt %s (ignored)", "SO_DEBUG");
|
|
}
|
|
len = sizeof(data_addr.si_su);
|
|
memset((char *)&data_addr, 0, sizeof (data_addr));
|
|
if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
|
|
warn("Can't determine my address of data connection");
|
|
goto bad;
|
|
}
|
|
data_addr.su_len = len;
|
|
if (ftp_listen(data, 1) < 0)
|
|
warn("Can't listen to data connection");
|
|
|
|
if (sendport) {
|
|
char hname[NI_MAXHOST], sname[NI_MAXSERV];
|
|
struct sockinet tmp;
|
|
|
|
switch (data_addr.su_family) {
|
|
case AF_INET:
|
|
if (!epsv4 || epsv4bad) {
|
|
result = COMPLETE + 1;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (!epsv6 || epsv6bad) {
|
|
result = COMPLETE + 1;
|
|
break;
|
|
}
|
|
#endif
|
|
af = (data_addr.su_family == AF_INET) ? 1 : 2;
|
|
tmp = data_addr;
|
|
#ifdef INET6
|
|
if (tmp.su_family == AF_INET6)
|
|
tmp.si_su.su_sin6.sin6_scope_id = 0;
|
|
#endif
|
|
if (getnameinfo((struct sockaddr *)&tmp.si_su,
|
|
tmp.su_len, hname, sizeof(hname), sname,
|
|
sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
|
|
result = ERROR;
|
|
} else {
|
|
overbose = verbose;
|
|
if (ftp_debug == 0)
|
|
verbose = -1;
|
|
result = command("EPRT |%u|%s|%s|", af, hname,
|
|
sname);
|
|
verbose = overbose;
|
|
if (verbose > 0 &&
|
|
(result == COMPLETE || !connected))
|
|
fprintf(ttyout, "%s\n", reply_string);
|
|
if (!connected)
|
|
return (1);
|
|
if (result != COMPLETE) {
|
|
epsv4bad = 1;
|
|
DPRINTF("disabling epsv4 for this "
|
|
"connection\n");
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
result = COMPLETE + 1;
|
|
break;
|
|
}
|
|
if (result == COMPLETE)
|
|
goto skip_port;
|
|
|
|
switch (data_addr.su_family) {
|
|
case AF_INET:
|
|
a = (char *)&data_addr.si_su.su_sin.sin_addr;
|
|
p = (char *)&data_addr.su_port;
|
|
result = command("PORT %d,%d,%d,%d,%d,%d",
|
|
UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
|
|
UC(p[0]), UC(p[1]));
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6: {
|
|
uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)];
|
|
uint8_t up[sizeof(data_addr.su_port)];
|
|
|
|
memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr,
|
|
sizeof(ua));
|
|
memcpy(up, &data_addr.su_port, sizeof(up));
|
|
|
|
result = command(
|
|
"LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
|
|
6, 16,
|
|
ua[0], ua[1], ua[2], ua[3],
|
|
ua[4], ua[5], ua[6], ua[7],
|
|
ua[8], ua[9], ua[10], ua[11],
|
|
ua[12], ua[13], ua[14], ua[15],
|
|
2,
|
|
up[0], up[1]);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
result = COMPLETE + 1; /* xxx */
|
|
}
|
|
if (!connected)
|
|
return (1);
|
|
skip_port:
|
|
|
|
if (result == ERROR && sendport == -1) {
|
|
sendport = 0;
|
|
tmpno = 1;
|
|
goto noport;
|
|
}
|
|
return (result != COMPLETE);
|
|
}
|
|
if (tmpno)
|
|
sendport = 1;
|
|
#ifdef IPTOS_THROUGHPUT
|
|
if (data_addr.su_family == AF_INET) {
|
|
on = IPTOS_THROUGHPUT;
|
|
if (setsockopt(data, IPPROTO_IP, IP_TOS,
|
|
(void *)&on, sizeof(on)) == -1) {
|
|
DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
|
|
}
|
|
}
|
|
#endif
|
|
return (0);
|
|
bad:
|
|
(void)close(data);
|
|
data = -1;
|
|
if (tmpno)
|
|
sendport = 1;
|
|
return (1);
|
|
}
|
|
|
|
FILE *
|
|
dataconn(const char *lmode)
|
|
{
|
|
struct sockinet from;
|
|
int s, flags, rv, timeout;
|
|
struct timeval endtime, now, td;
|
|
struct pollfd pfd[1];
|
|
socklen_t fromlen;
|
|
|
|
if (passivemode) /* passive data connection */
|
|
return (fdopen(data, lmode));
|
|
|
|
/* active mode data connection */
|
|
|
|
if ((flags = fcntl(data, F_GETFL, 0)) == -1)
|
|
goto dataconn_failed; /* get current socket flags */
|
|
if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
|
|
goto dataconn_failed; /* set non-blocking connect */
|
|
|
|
/* NOTE: we now must restore socket flags on successful exit */
|
|
|
|
/* limit time waiting on listening socket */
|
|
pfd[0].fd = data;
|
|
pfd[0].events = POLLIN;
|
|
(void)gettimeofday(&endtime, NULL); /* determine end time */
|
|
endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
|
|
/* without -q, default to 60s */
|
|
do {
|
|
(void)gettimeofday(&now, NULL);
|
|
timersub(&endtime, &now, &td);
|
|
timeout = td.tv_sec * 1000 + td.tv_usec/1000;
|
|
if (timeout < 0)
|
|
timeout = 0;
|
|
rv = ftp_poll(pfd, 1, timeout);
|
|
} while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
|
|
if (rv == -1) {
|
|
warn("Can't poll waiting before accept");
|
|
goto dataconn_failed;
|
|
}
|
|
if (rv == 0) {
|
|
warnx("Poll timeout waiting before accept");
|
|
goto dataconn_failed;
|
|
}
|
|
|
|
/* (non-blocking) accept the connection */
|
|
fromlen = myctladdr.su_len;
|
|
do {
|
|
s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
|
|
} while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
|
|
if (s == -1) {
|
|
warn("Can't accept data connection");
|
|
goto dataconn_failed;
|
|
}
|
|
|
|
(void)close(data);
|
|
data = s;
|
|
if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
|
|
goto dataconn_failed;
|
|
|
|
#ifdef IPTOS_THROUGHPUT
|
|
if (from.su_family == AF_INET) {
|
|
int tos = IPTOS_THROUGHPUT;
|
|
if (setsockopt(s, IPPROTO_IP, IP_TOS,
|
|
(void *)&tos, sizeof(tos)) == -1) {
|
|
DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
|
|
}
|
|
}
|
|
#endif
|
|
return (fdopen(data, lmode));
|
|
|
|
dataconn_failed:
|
|
(void)close(data);
|
|
data = -1;
|
|
return (NULL);
|
|
}
|
|
|
|
void
|
|
psabort(int notused)
|
|
{
|
|
int oerrno = errno;
|
|
|
|
sigint_raised = 1;
|
|
alarmtimer(0);
|
|
abrtflag++;
|
|
errno = oerrno;
|
|
}
|
|
|
|
void
|
|
pswitch(int flag)
|
|
{
|
|
sigfunc oldintr;
|
|
static struct comvars {
|
|
int connect;
|
|
char name[MAXHOSTNAMELEN];
|
|
struct sockinet mctl;
|
|
struct sockinet hctl;
|
|
FILE *in;
|
|
FILE *out;
|
|
int tpe;
|
|
int curtpe;
|
|
int cpnd;
|
|
int sunqe;
|
|
int runqe;
|
|
int mcse;
|
|
int ntflg;
|
|
char nti[17];
|
|
char nto[17];
|
|
int mapflg;
|
|
char mi[MAXPATHLEN];
|
|
char mo[MAXPATHLEN];
|
|
} proxstruct, tmpstruct;
|
|
struct comvars *ip, *op;
|
|
|
|
abrtflag = 0;
|
|
oldintr = xsignal(SIGINT, psabort);
|
|
if (flag) {
|
|
if (proxy)
|
|
return;
|
|
ip = &tmpstruct;
|
|
op = &proxstruct;
|
|
proxy++;
|
|
} else {
|
|
if (!proxy)
|
|
return;
|
|
ip = &proxstruct;
|
|
op = &tmpstruct;
|
|
proxy = 0;
|
|
}
|
|
ip->connect = connected;
|
|
connected = op->connect;
|
|
if (hostname)
|
|
(void)strlcpy(ip->name, hostname, sizeof(ip->name));
|
|
else
|
|
ip->name[0] = '\0';
|
|
hostname = op->name;
|
|
ip->hctl = hisctladdr;
|
|
hisctladdr = op->hctl;
|
|
ip->mctl = myctladdr;
|
|
myctladdr = op->mctl;
|
|
ip->in = cin;
|
|
cin = op->in;
|
|
ip->out = cout;
|
|
cout = op->out;
|
|
ip->tpe = type;
|
|
type = op->tpe;
|
|
ip->curtpe = curtype;
|
|
curtype = op->curtpe;
|
|
ip->cpnd = cpend;
|
|
cpend = op->cpnd;
|
|
ip->sunqe = sunique;
|
|
sunique = op->sunqe;
|
|
ip->runqe = runique;
|
|
runique = op->runqe;
|
|
ip->mcse = mcase;
|
|
mcase = op->mcse;
|
|
ip->ntflg = ntflag;
|
|
ntflag = op->ntflg;
|
|
(void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
|
|
(void)strlcpy(ntin, op->nti, sizeof(ntin));
|
|
(void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
|
|
(void)strlcpy(ntout, op->nto, sizeof(ntout));
|
|
ip->mapflg = mapflag;
|
|
mapflag = op->mapflg;
|
|
(void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
|
|
(void)strlcpy(mapin, op->mi, sizeof(mapin));
|
|
(void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
|
|
(void)strlcpy(mapout, op->mo, sizeof(mapout));
|
|
(void)xsignal(SIGINT, oldintr);
|
|
if (abrtflag) {
|
|
abrtflag = 0;
|
|
(*oldintr)(SIGINT);
|
|
}
|
|
}
|
|
|
|
__dead static void
|
|
abortpt(int notused)
|
|
{
|
|
|
|
sigint_raised = 1;
|
|
alarmtimer(0);
|
|
if (fromatty)
|
|
write(fileno(ttyout), "\n", 1);
|
|
ptabflg++;
|
|
mflag = 0;
|
|
abrtflag = 0;
|
|
siglongjmp(ptabort, 1);
|
|
}
|
|
|
|
void
|
|
proxtrans(const char *cmd, const char *local, const char *remote)
|
|
{
|
|
sigfunc volatile oldintr;
|
|
int prox_type, nfnd;
|
|
int volatile secndflag;
|
|
const char *volatile cmd2;
|
|
|
|
oldintr = NULL;
|
|
secndflag = 0;
|
|
if (strcmp(cmd, "RETR"))
|
|
cmd2 = "RETR";
|
|
else
|
|
cmd2 = runique ? "STOU" : "STOR";
|
|
if ((prox_type = type) == 0) {
|
|
if (unix_server && unix_proxy)
|
|
prox_type = TYPE_I;
|
|
else
|
|
prox_type = TYPE_A;
|
|
}
|
|
if (curtype != prox_type)
|
|
changetype(prox_type, 1);
|
|
if (command("PASV") != COMPLETE) {
|
|
fputs("proxy server does not support third party transfers.\n",
|
|
ttyout);
|
|
return;
|
|
}
|
|
pswitch(0);
|
|
if (!connected) {
|
|
fputs("No primary connection.\n", ttyout);
|
|
pswitch(1);
|
|
code = -1;
|
|
return;
|
|
}
|
|
if (curtype != prox_type)
|
|
changetype(prox_type, 1);
|
|
if (command("PORT %s", pasv) != COMPLETE) {
|
|
pswitch(1);
|
|
return;
|
|
}
|
|
if (sigsetjmp(ptabort, 1))
|
|
goto abort;
|
|
oldintr = xsignal(SIGINT, abortpt);
|
|
if ((restart_point &&
|
|
(command("REST " LLF, (LLT) restart_point) != CONTINUE))
|
|
|| (command("%s %s", cmd, remote) != PRELIM)) {
|
|
(void)xsignal(SIGINT, oldintr);
|
|
pswitch(1);
|
|
return;
|
|
}
|
|
sleep(2);
|
|
pswitch(1);
|
|
secndflag++;
|
|
if ((restart_point &&
|
|
(command("REST " LLF, (LLT) restart_point) != CONTINUE))
|
|
|| (command("%s %s", cmd2, local) != PRELIM))
|
|
goto abort;
|
|
ptflag++;
|
|
(void)getreply(0);
|
|
pswitch(0);
|
|
(void)getreply(0);
|
|
(void)xsignal(SIGINT, oldintr);
|
|
pswitch(1);
|
|
ptflag = 0;
|
|
fprintf(ttyout, "local: %s remote: %s\n", local, remote);
|
|
return;
|
|
abort:
|
|
if (sigsetjmp(xferabort, 1)) {
|
|
(void)xsignal(SIGINT, oldintr);
|
|
return;
|
|
}
|
|
(void)xsignal(SIGINT, abort_squared);
|
|
ptflag = 0;
|
|
if (strcmp(cmd, "RETR") && !proxy)
|
|
pswitch(1);
|
|
else if (!strcmp(cmd, "RETR") && proxy)
|
|
pswitch(0);
|
|
if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
|
|
if (command("%s %s", cmd2, local) != PRELIM) {
|
|
pswitch(0);
|
|
if (cpend)
|
|
abort_remote(NULL);
|
|
}
|
|
pswitch(1);
|
|
if (ptabflg)
|
|
code = -1;
|
|
(void)xsignal(SIGINT, oldintr);
|
|
return;
|
|
}
|
|
if (cpend)
|
|
abort_remote(NULL);
|
|
pswitch(!proxy);
|
|
if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
|
|
if (command("%s %s", cmd2, local) != PRELIM) {
|
|
pswitch(0);
|
|
if (cpend)
|
|
abort_remote(NULL);
|
|
pswitch(1);
|
|
if (ptabflg)
|
|
code = -1;
|
|
(void)xsignal(SIGINT, oldintr);
|
|
return;
|
|
}
|
|
}
|
|
if (cpend)
|
|
abort_remote(NULL);
|
|
pswitch(!proxy);
|
|
if (cpend) {
|
|
if ((nfnd = empty(cin, NULL, 10)) <= 0) {
|
|
if (nfnd < 0)
|
|
warn("Error aborting proxy command");
|
|
if (ptabflg)
|
|
code = -1;
|
|
lostpeer(0);
|
|
}
|
|
(void)getreply(0);
|
|
(void)getreply(0);
|
|
}
|
|
if (proxy)
|
|
pswitch(0);
|
|
pswitch(1);
|
|
if (ptabflg)
|
|
code = -1;
|
|
(void)xsignal(SIGINT, oldintr);
|
|
}
|
|
|
|
void
|
|
reset(int argc, char *argv[])
|
|
{
|
|
int nfnd = 1;
|
|
|
|
if (argc == 0 && argv != NULL) {
|
|
UPRINTF("usage: %s\n", argv[0]);
|
|
code = -1;
|
|
return;
|
|
}
|
|
while (nfnd > 0) {
|
|
if ((nfnd = empty(cin, NULL, 0)) < 0) {
|
|
warn("Error resetting connection");
|
|
code = -1;
|
|
lostpeer(0);
|
|
} else if (nfnd)
|
|
(void)getreply(0);
|
|
}
|
|
}
|
|
|
|
char *
|
|
gunique(const char *local)
|
|
{
|
|
static char new[MAXPATHLEN];
|
|
char *cp = strrchr(local, '/');
|
|
int d, count=0, len;
|
|
char ext = '1';
|
|
|
|
if (cp)
|
|
*cp = '\0';
|
|
d = access(cp == local ? "/" : cp ? local : ".", W_OK);
|
|
if (cp)
|
|
*cp = '/';
|
|
if (d < 0) {
|
|
warn("Can't access `%s'", local);
|
|
return (NULL);
|
|
}
|
|
len = strlcpy(new, local, sizeof(new));
|
|
cp = &new[len];
|
|
*cp++ = '.';
|
|
while (!d) {
|
|
if (++count == 100) {
|
|
fputs("runique: can't find unique file name.\n",
|
|
ttyout);
|
|
return (NULL);
|
|
}
|
|
*cp++ = ext;
|
|
*cp = '\0';
|
|
if (ext == '9')
|
|
ext = '0';
|
|
else
|
|
ext++;
|
|
if ((d = access(new, F_OK)) < 0)
|
|
break;
|
|
if (ext != '0')
|
|
cp--;
|
|
else if (*(cp - 2) == '.')
|
|
*(cp - 1) = '1';
|
|
else {
|
|
*(cp - 2) = *(cp - 2) + 1;
|
|
cp--;
|
|
}
|
|
}
|
|
return (new);
|
|
}
|
|
|
|
/*
|
|
* abort_squared --
|
|
* aborts abort_remote(). lostpeer() is called because if the user is
|
|
* too impatient to wait or there's another problem then ftp really
|
|
* needs to get back to a known state.
|
|
*/
|
|
static void
|
|
abort_squared(int dummy)
|
|
{
|
|
char msgbuf[100];
|
|
size_t len;
|
|
|
|
sigint_raised = 1;
|
|
alarmtimer(0);
|
|
len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
|
|
sizeof(msgbuf));
|
|
write(fileno(ttyout), msgbuf, len);
|
|
lostpeer(0);
|
|
siglongjmp(xferabort, 1);
|
|
}
|
|
|
|
void
|
|
abort_remote(FILE *din)
|
|
{
|
|
unsigned char buf[BUFSIZ];
|
|
int nfnd;
|
|
|
|
if (cout == NULL) {
|
|
warnx("Lost control connection for abort");
|
|
if (ptabflg)
|
|
code = -1;
|
|
lostpeer(0);
|
|
return;
|
|
}
|
|
/*
|
|
* send IAC in urgent mode instead of DM because 4.3BSD places oob mark
|
|
* after urgent byte rather than before as is protocol now
|
|
*/
|
|
buf[0] = IAC;
|
|
buf[1] = IP;
|
|
buf[2] = IAC;
|
|
if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
|
|
warn("Can't send abort message");
|
|
fprintf(cout, "%cABOR\r\n", DM);
|
|
(void)fflush(cout);
|
|
if ((nfnd = empty(cin, din, 10)) <= 0) {
|
|
if (nfnd < 0)
|
|
warn("Can't send abort message");
|
|
if (ptabflg)
|
|
code = -1;
|
|
lostpeer(0);
|
|
}
|
|
if (din && (nfnd & 2)) {
|
|
while (read(fileno(din), buf, BUFSIZ) > 0)
|
|
continue;
|
|
}
|
|
if (getreply(0) == ERROR && code == 552) {
|
|
/* 552 needed for nic style abort */
|
|
(void)getreply(0);
|
|
}
|
|
(void)getreply(0);
|
|
}
|
|
|
|
/*
|
|
* Ensure that ai->ai_addr is NOT an IPv4 mapped address.
|
|
* IPv4 mapped address complicates too many things in FTP
|
|
* protocol handling, as FTP protocol is defined differently
|
|
* between IPv4 and IPv6.
|
|
*
|
|
* This may not be the best way to handle this situation,
|
|
* since the semantics of IPv4 mapped address is defined in
|
|
* the kernel. There are configurations where we should use
|
|
* IPv4 mapped address as native IPv6 address, not as
|
|
* "an IPv6 address that embeds IPv4 address" (namely, SIIT).
|
|
*
|
|
* More complete solution would be to have an additional
|
|
* getsockopt to grab "real" peername/sockname. "real"
|
|
* peername/sockname will be AF_INET if IPv4 mapped address
|
|
* is used to embed IPv4 address, and will be AF_INET6 if
|
|
* we use it as native. What a mess!
|
|
*/
|
|
void
|
|
ai_unmapped(struct addrinfo *ai)
|
|
{
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_in sin;
|
|
socklen_t len;
|
|
|
|
if (ai->ai_family != AF_INET6)
|
|
return;
|
|
if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
|
|
sizeof(sin) > ai->ai_addrlen)
|
|
return;
|
|
sin6 = (struct sockaddr_in6 *)ai->ai_addr;
|
|
if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
|
|
return;
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
len = sizeof(struct sockaddr_in);
|
|
memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
|
|
sizeof(sin.sin_addr));
|
|
sin.sin_port = sin6->sin6_port;
|
|
|
|
ai->ai_family = AF_INET;
|
|
#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
|
|
sin.sin_len = len;
|
|
#endif
|
|
memcpy(ai->ai_addr, &sin, len);
|
|
ai->ai_addrlen = len;
|
|
#endif
|
|
}
|
|
|
|
#ifdef NO_USAGE
|
|
void
|
|
xusage(void)
|
|
{
|
|
fputs("Usage error\n", ttyout);
|
|
}
|
|
#endif
|