1395 lines
31 KiB
C
1395 lines
31 KiB
C
/*-
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* Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
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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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* in this position and unchanged.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "mojosetup_libfetch.h"
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#if SUPPORT_URL_FTP
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#if !sun /* __MOJOSETUP__ Solaris support... */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD: src/lib/libfetch/ftp.c,v 1.96 2007/04/22 22:33:29 njl Exp $");
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#endif
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/*
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* Portions of this code were taken from or based on ftpio.c:
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*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*
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* Major Changelog:
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*
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* Dag-Erling Coïdan Smørgrav
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* 9 Jun 1998
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*
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* Incorporated into libfetch
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*
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* Jordan K. Hubbard
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* 17 Jan 1996
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*
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* Turned inside out. Now returns xfers as new file ids, not as a special
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* `state' of FTP_t
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*
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* $ftpioId: ftpio.c,v 1.30 1998/04/11 07:28:53 phk Exp $
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*
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <ctype.h>
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#if !sun /* __MOJOSETUP__ Solaris support... */
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#include <err.h>
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#endif
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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 <stdarg.h>
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#include <stdint.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 "fetch.h"
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#include "common.h"
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#include "ftperr.h"
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#define FTP_ANONYMOUS_USER "anonymous"
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#define FTP_CONNECTION_ALREADY_OPEN 125
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#define FTP_OPEN_DATA_CONNECTION 150
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#define FTP_OK 200
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#define FTP_FILE_STATUS 213
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#define FTP_SERVICE_READY 220
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#define FTP_TRANSFER_COMPLETE 226
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#define FTP_PASSIVE_MODE 227
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#define FTP_LPASSIVE_MODE 228
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#define FTP_EPASSIVE_MODE 229
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#define FTP_LOGGED_IN 230
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#define FTP_FILE_ACTION_OK 250
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#define FTP_DIRECTORY_CREATED 257 /* multiple meanings */
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#define FTP_FILE_CREATED 257 /* multiple meanings */
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#define FTP_WORKING_DIRECTORY 257 /* multiple meanings */
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#define FTP_NEED_PASSWORD 331
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#define FTP_NEED_ACCOUNT 332
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#define FTP_FILE_OK 350
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#define FTP_SYNTAX_ERROR 500
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#define FTP_PROTOCOL_ERROR 999
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static struct url cached_host;
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static conn_t *cached_connection;
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#define isftpreply(foo) (isdigit(foo[0]) && isdigit(foo[1]) \
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&& isdigit(foo[2]) \
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&& (foo[3] == ' ' || foo[3] == '\0'))
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#define isftpinfo(foo) (isdigit(foo[0]) && isdigit(foo[1]) \
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&& isdigit(foo[2]) && foo[3] == '-')
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/*
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* Translate IPv4 mapped IPv6 address to IPv4 address
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*/
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static void
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unmappedaddr(struct sockaddr_in6 *sin6)
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{
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struct sockaddr_in *sin4;
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u_int32_t addr;
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int port;
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if (sin6->sin6_family != AF_INET6 ||
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!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
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return;
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sin4 = (struct sockaddr_in *)sin6;
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addr = *(u_int32_t *)&sin6->sin6_addr.s6_addr[12];
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port = sin6->sin6_port;
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memset(sin4, 0, sizeof(struct sockaddr_in));
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sin4->sin_addr.s_addr = addr;
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sin4->sin_port = port;
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sin4->sin_family = AF_INET;
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#if __MOJOSETUP__
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#if FREEBSD
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sin4->sin_len = sizeof(struct sockaddr_in);
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#endif
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#endif
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}
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/*
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* Get server response
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*/
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static int
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_ftp_chkerr(conn_t *conn)
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{
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if (_fetch_getln(conn) == -1) {
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_fetch_syserr();
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return (-1);
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}
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if (isftpinfo(conn->buf)) {
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while (conn->buflen && !isftpreply(conn->buf)) {
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if (_fetch_getln(conn) == -1) {
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_fetch_syserr();
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return (-1);
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}
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}
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}
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while (conn->buflen && isspace(conn->buf[conn->buflen - 1]))
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conn->buflen--;
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conn->buf[conn->buflen] = '\0';
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if (!isftpreply(conn->buf)) {
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_ftp_seterr(FTP_PROTOCOL_ERROR);
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return (-1);
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}
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conn->err = (conn->buf[0] - '0') * 100
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+ (conn->buf[1] - '0') * 10
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+ (conn->buf[2] - '0');
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return (conn->err);
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}
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/*
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* Send a command and check reply
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*/
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#if __MOJOSETUP__
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static int _ftp_cmd(conn_t *conn, const char *fmt, ...) ISPRINTF(2,3);
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#endif
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static int
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_ftp_cmd(conn_t *conn, const char *fmt, ...)
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{
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va_list ap;
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size_t len;
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char *msg;
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int r;
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va_start(ap, fmt);
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len = vasprintf(&msg, fmt, ap);
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va_end(ap);
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if (msg == NULL) {
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errno = ENOMEM;
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_fetch_syserr();
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return (-1);
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}
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r = _fetch_putln(conn, msg, len);
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free(msg);
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if (r == -1) {
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_fetch_syserr();
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return (-1);
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}
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return (_ftp_chkerr(conn));
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}
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/*
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* Return a pointer to the filename part of a path
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*/
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static const char *
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_ftp_filename(const char *file, int *len, int *type)
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{
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const char *s;
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if ((s = strrchr(file, '/')) == NULL)
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s = file;
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else
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s = s + 1;
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*len = strlen(s);
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if (*len > 7 && strncmp(s + *len - 7, ";type=", 6) == 0) {
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*type = s[*len - 1];
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*len -= 7;
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} else {
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*type = '\0';
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}
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return (s);
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}
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/*
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* Get current working directory from the reply to a CWD, PWD or CDUP
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* command.
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*/
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static int
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_ftp_pwd(conn_t *conn, char *pwd, size_t pwdlen)
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{
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char *src, *dst, *end;
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int q;
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if (conn->err != FTP_WORKING_DIRECTORY &&
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conn->err != FTP_FILE_ACTION_OK)
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return (FTP_PROTOCOL_ERROR);
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end = conn->buf + conn->buflen;
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src = conn->buf + 4;
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if (src >= end || *src++ != '"')
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return (FTP_PROTOCOL_ERROR);
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for (q = 0, dst = pwd; src < end && pwdlen--; ++src) {
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if (!q && *src == '"')
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q = 1;
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else if (q && *src != '"')
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break;
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else if (q)
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*dst++ = '"', q = 0;
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else
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*dst++ = *src;
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}
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if (!pwdlen)
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return (FTP_PROTOCOL_ERROR);
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*dst = '\0';
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#if 0
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DEBUG(fprintf(stderr, "pwd: [%s]\n", pwd));
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#endif
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return (FTP_OK);
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}
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/*
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* Change working directory to the directory that contains the specified
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* file.
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*/
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static int
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_ftp_cwd(conn_t *conn, const char *file)
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{
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const char *beg, *end;
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char pwd[PATH_MAX];
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int e, i, len;
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/* If no slashes in name, no need to change dirs. */
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if ((end = strrchr(file, '/')) == NULL)
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return (0);
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if ((e = _ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY ||
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(e = _ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) {
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_ftp_seterr(e);
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return (-1);
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}
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for (;;) {
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len = strlen(pwd);
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/* Look for a common prefix between PWD and dir to fetch. */
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for (i = 0; i <= len && i <= end - file; ++i)
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if (pwd[i] != file[i])
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break;
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#if 0
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DEBUG(fprintf(stderr, "have: [%.*s|%s]\n", i, pwd, pwd + i));
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DEBUG(fprintf(stderr, "want: [%.*s|%s]\n", i, file, file + i));
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#endif
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/* Keep going up a dir until we have a matching prefix. */
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if (pwd[i] == '\0' && (file[i - 1] == '/' || file[i] == '/'))
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break;
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if ((e = _ftp_cmd(conn, "CDUP")) != FTP_FILE_ACTION_OK ||
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(e = _ftp_cmd(conn, "PWD")) != FTP_WORKING_DIRECTORY ||
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(e = _ftp_pwd(conn, pwd, sizeof(pwd))) != FTP_OK) {
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_ftp_seterr(e);
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return (-1);
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}
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}
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#ifdef FTP_COMBINE_CWDS
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/* Skip leading slashes, even "////". */
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for (beg = file + i; beg < end && *beg == '/'; ++beg, ++i)
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/* nothing */ ;
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/* If there is no trailing dir, we're already there. */
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if (beg >= end)
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return (0);
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/* Change to the directory all in one chunk (e.g., foo/bar/baz). */
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e = _ftp_cmd(conn, "CWD %.*s", (int)(end - beg), beg);
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if (e == FTP_FILE_ACTION_OK)
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return (0);
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#endif /* FTP_COMBINE_CWDS */
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/* That didn't work so go back to legacy behavior (multiple CWDs). */
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for (beg = file + i; beg < end; beg = file + i + 1) {
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while (*beg == '/')
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++beg, ++i;
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for (++i; file + i < end && file[i] != '/'; ++i)
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/* nothing */ ;
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#if __MOJOSETUP__
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e = _ftp_cmd(conn, "CWD %.*s", (int) (file + i - beg), beg);
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#else
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e = _ftp_cmd(conn, "CWD %.*s", file + i - beg, beg);
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#endif
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if (e != FTP_FILE_ACTION_OK) {
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_ftp_seterr(e);
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return (-1);
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}
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}
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return (0);
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}
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/*
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* Set transfer mode and data type
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*/
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static int
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_ftp_mode_type(conn_t *conn, int mode, int type)
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{
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int e;
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switch (mode) {
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case 0:
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case 's':
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mode = 'S';
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case 'S':
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break;
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default:
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return (FTP_PROTOCOL_ERROR);
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}
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if ((e = _ftp_cmd(conn, "MODE %c", mode)) != FTP_OK) {
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if (mode == 'S') {
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/*
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* Stream mode is supposed to be the default - so
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* much so that some servers not only do not
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* support any other mode, but do not support the
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* MODE command at all.
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*
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* If "MODE S" fails, it is unlikely that we
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* previously succeeded in setting a different
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* mode. Therefore, we simply hope that the
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* server is already in the correct mode, and
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* silently ignore the failure.
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*/
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} else {
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return (e);
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}
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}
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switch (type) {
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case 0:
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case 'i':
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type = 'I';
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case 'I':
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break;
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case 'a':
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type = 'A';
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case 'A':
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break;
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case 'd':
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type = 'D';
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case 'D':
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/* can't handle yet */
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default:
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return (FTP_PROTOCOL_ERROR);
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}
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if ((e = _ftp_cmd(conn, "TYPE %c", type)) != FTP_OK)
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return (e);
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return (FTP_OK);
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}
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|
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/*
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* Request and parse file stats
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*/
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static int
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_ftp_stat(conn_t *conn, const char *file, struct url_stat *us)
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{
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char *ln;
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const char *filename;
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int filenamelen, type;
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struct tm tm;
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time_t t;
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int e;
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us->size = -1;
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us->atime = us->mtime = 0;
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filename = _ftp_filename(file, &filenamelen, &type);
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if ((e = _ftp_mode_type(conn, 0, type)) != FTP_OK) {
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_ftp_seterr(e);
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return (-1);
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}
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e = _ftp_cmd(conn, "SIZE %.*s", filenamelen, filename);
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if (e != FTP_FILE_STATUS) {
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_ftp_seterr(e);
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return (-1);
|
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}
|
|
for (ln = conn->buf + 4; *ln && isspace(*ln); ln++)
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/* nothing */ ;
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for (us->size = 0; *ln && isdigit(*ln); ln++)
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us->size = us->size * 10 + *ln - '0';
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if (*ln && !isspace(*ln)) {
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_ftp_seterr(FTP_PROTOCOL_ERROR);
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us->size = -1;
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return (-1);
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}
|
|
if (us->size == 0)
|
|
us->size = -1;
|
|
DEBUG(fprintf(stderr, "size: [%lld]\n", (long long)us->size));
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|
|
|
e = _ftp_cmd(conn, "MDTM %.*s", filenamelen, filename);
|
|
if (e != FTP_FILE_STATUS) {
|
|
_ftp_seterr(e);
|
|
return (-1);
|
|
}
|
|
for (ln = conn->buf + 4; *ln && isspace(*ln); ln++)
|
|
/* nothing */ ;
|
|
switch (strspn(ln, "0123456789")) {
|
|
case 14:
|
|
break;
|
|
case 15:
|
|
ln++;
|
|
ln[0] = '2';
|
|
ln[1] = '0';
|
|
break;
|
|
default:
|
|
_ftp_seterr(FTP_PROTOCOL_ERROR);
|
|
return (-1);
|
|
}
|
|
if (sscanf(ln, "%04d%02d%02d%02d%02d%02d",
|
|
&tm.tm_year, &tm.tm_mon, &tm.tm_mday,
|
|
&tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
|
|
_ftp_seterr(FTP_PROTOCOL_ERROR);
|
|
return (-1);
|
|
}
|
|
tm.tm_mon--;
|
|
tm.tm_year -= 1900;
|
|
tm.tm_isdst = -1;
|
|
t = timegm(&tm);
|
|
if (t == (time_t)-1)
|
|
t = time(NULL);
|
|
us->mtime = t;
|
|
us->atime = t;
|
|
DEBUG(fprintf(stderr,
|
|
"last modified: [%04d-%02d-%02d %02d:%02d:%02d]\n",
|
|
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
|
|
tm.tm_hour, tm.tm_min, tm.tm_sec));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* I/O functions for FTP
|
|
*/
|
|
struct ftpio {
|
|
conn_t *cconn; /* Control connection */
|
|
conn_t *dconn; /* Data connection */
|
|
int dir; /* Direction */
|
|
int eof; /* EOF reached */
|
|
int err; /* Error code */
|
|
#if __MOJOSETUP__
|
|
int64 bytes_read;
|
|
int64 length;
|
|
#endif
|
|
};
|
|
|
|
|
|
|
|
#if !__MOJOSETUP__
|
|
static int _ftp_readfn(void *, char *, int);
|
|
static int _ftp_writefn(void *, const char *, int);
|
|
static fpos_t _ftp_seekfn(void *, fpos_t, int);
|
|
static int _ftp_closefn(void *);
|
|
#endif
|
|
|
|
|
|
#if __MOJOSETUP__
|
|
static boolean MojoInput_ftp_ready(MojoInput *v)
|
|
{
|
|
boolean retval = true;
|
|
struct ftpio *io = (struct ftpio *)v->opaque;
|
|
if (io->dconn != NULL)
|
|
{
|
|
fd_set rfds;
|
|
struct timeval tv;
|
|
tv.tv_sec = tv.tv_usec = 0;
|
|
FD_ZERO(&rfds);
|
|
FD_SET(io->dconn->sd, &rfds);
|
|
retval = (select(io->dconn->sd+1, &rfds, NULL, NULL, &tv) > 0);
|
|
} // if
|
|
return retval;
|
|
}
|
|
static int64 MojoInput_ftp_tell(MojoInput *v)
|
|
{
|
|
struct ftpio *io = (struct ftpio *)v->opaque;
|
|
return io->bytes_read;
|
|
}
|
|
static int64 MojoInput_ftp_length(MojoInput *v)
|
|
{
|
|
struct ftpio *io = (struct ftpio *)v->opaque;
|
|
return io->length;
|
|
}
|
|
static MojoInput* MojoInput_ftp_duplicate(MojoInput *v)
|
|
{
|
|
return NULL; // !!! FIXME: fatal?
|
|
}
|
|
#endif
|
|
|
|
|
|
#if __MOJOSETUP__
|
|
static int64 MojoInput_ftp_read(MojoInput *v, void *buf, uint32 len)
|
|
#else
|
|
static int
|
|
_ftp_readfn(void *v, char *buf, int len)
|
|
#endif
|
|
{
|
|
struct ftpio *io;
|
|
int r;
|
|
|
|
#if __MOJOSETUP__
|
|
io = (struct ftpio *)v->opaque;
|
|
#else
|
|
io = (struct ftpio *)v;
|
|
if (io == NULL) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
#endif
|
|
if (io->cconn == NULL || io->dconn == NULL || io->dir == O_WRONLY) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
if (io->err) {
|
|
errno = io->err;
|
|
return (-1);
|
|
}
|
|
if (io->eof)
|
|
return (0);
|
|
r = _fetch_read(io->dconn, buf, len);
|
|
#if __MOJOSETUP__
|
|
if (r > 0) {
|
|
io->bytes_read += r;
|
|
return (r);
|
|
}
|
|
#else
|
|
if (r > 0)
|
|
return (r);
|
|
#endif
|
|
if (r == 0) {
|
|
io->eof = 1;
|
|
return (0);
|
|
}
|
|
if (errno != EINTR)
|
|
io->err = errno;
|
|
return (-1);
|
|
}
|
|
|
|
#if !__MOJOSETUP__
|
|
static int
|
|
_ftp_writefn(void *v, const char *buf, int len)
|
|
{
|
|
struct ftpio *io;
|
|
int w;
|
|
|
|
io = (struct ftpio *)v;
|
|
if (io == NULL) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
if (io->cconn == NULL || io->dconn == NULL || io->dir == O_RDONLY) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
if (io->err) {
|
|
errno = io->err;
|
|
return (-1);
|
|
}
|
|
w = _fetch_write(io->dconn, buf, len);
|
|
if (w >= 0)
|
|
return (w);
|
|
if (errno != EINTR)
|
|
io->err = errno;
|
|
return (-1);
|
|
}
|
|
#endif
|
|
|
|
#if __MOJOSETUP__
|
|
static boolean MojoInput_ftp_seek(MojoInput *v, uint64 pos)
|
|
#else
|
|
static fpos_t
|
|
_ftp_seekfn(void *v, fpos_t pos __unused, int whence __unused)
|
|
#endif
|
|
{
|
|
struct ftpio *io;
|
|
|
|
#if __MOJOSETUP__
|
|
io = (struct ftpio *)v->opaque;
|
|
#else
|
|
io = (struct ftpio *)v;
|
|
if (io == NULL) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
#endif
|
|
errno = ESPIPE;
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
_ftp_closefn(void *v)
|
|
{
|
|
struct ftpio *io;
|
|
int r;
|
|
|
|
#if __MOJOSETUP__
|
|
io = (struct ftpio *) ((MojoInput *)v)->opaque;
|
|
#else
|
|
io = (struct ftpio *)v;
|
|
if (io == NULL) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
#endif
|
|
if (io->dir == -1)
|
|
return (0);
|
|
if (io->cconn == NULL || io->dconn == NULL) {
|
|
errno = EBADF;
|
|
return (-1);
|
|
}
|
|
_fetch_close(io->dconn);
|
|
io->dir = -1;
|
|
io->dconn = NULL;
|
|
DEBUG(fprintf(stderr, "Waiting for final status\n"));
|
|
r = _ftp_chkerr(io->cconn);
|
|
if (io->cconn == cached_connection && io->cconn->ref == 1)
|
|
cached_connection = NULL;
|
|
_fetch_close(io->cconn);
|
|
free(io);
|
|
|
|
#if __MOJOSETUP__
|
|
free(v);
|
|
#endif
|
|
|
|
return (r == FTP_TRANSFER_COMPLETE) ? 0 : -1;
|
|
}
|
|
|
|
#if __MOJOSETUP__
|
|
static void MojoInput_ftp_close(MojoInput *v)
|
|
{
|
|
_ftp_closefn(v);
|
|
}
|
|
#endif
|
|
|
|
|
|
#if __MOJOSETUP__
|
|
static MojoInput *
|
|
#else
|
|
static FILE *
|
|
#endif
|
|
_ftp_setup(conn_t *cconn, conn_t *dconn, int mode)
|
|
{
|
|
struct ftpio *io;
|
|
#if __MOJOSETUP__
|
|
MojoInput *f = NULL;
|
|
#else
|
|
FILE *f;
|
|
#endif
|
|
|
|
if (cconn == NULL || dconn == NULL)
|
|
return (NULL);
|
|
if ((io = malloc(sizeof(*io))) == NULL)
|
|
return (NULL);
|
|
io->cconn = cconn;
|
|
io->dconn = dconn;
|
|
io->dir = mode;
|
|
io->eof = io->err = 0;
|
|
#if __MOJOSETUP__
|
|
io->bytes_read = 0;
|
|
io->length = -1;
|
|
f = (MojoInput *) xmalloc(sizeof (MojoInput));
|
|
f->ready = MojoInput_ftp_ready;
|
|
f->read = MojoInput_ftp_read;
|
|
f->seek = MojoInput_ftp_seek;
|
|
f->tell = MojoInput_ftp_tell;
|
|
f->length = MojoInput_ftp_length;
|
|
f->duplicate = MojoInput_ftp_duplicate;
|
|
f->close = MojoInput_ftp_close;
|
|
f->opaque = io;
|
|
#else
|
|
f = funopen(io, _ftp_readfn, _ftp_writefn, _ftp_seekfn, _ftp_closefn);
|
|
if (f == NULL)
|
|
free(io);
|
|
#endif
|
|
|
|
return (f);
|
|
}
|
|
|
|
/*
|
|
* Transfer file
|
|
*/
|
|
#if __MOJOSETUP__
|
|
static MojoInput *
|
|
#else
|
|
static FILE *
|
|
#endif
|
|
_ftp_transfer(conn_t *conn, const char *oper, const char *file,
|
|
int mode, off_t offset, const char *flags)
|
|
{
|
|
struct sockaddr_storage sa;
|
|
struct sockaddr_in6 *sin6;
|
|
struct sockaddr_in *sin4;
|
|
const char *bindaddr;
|
|
const char *filename;
|
|
int filenamelen, type;
|
|
int low, pasv, verbose;
|
|
int e, sd = -1;
|
|
socklen_t l;
|
|
char *s;
|
|
#if __MOJOSETUP__
|
|
MojoInput *df = NULL;
|
|
#else
|
|
FILE *df;
|
|
#endif
|
|
|
|
/* check flags */
|
|
low = CHECK_FLAG('l');
|
|
pasv = CHECK_FLAG('p');
|
|
verbose = CHECK_FLAG('v');
|
|
|
|
/* passive mode */
|
|
if (!pasv)
|
|
pasv = ((s = getenv("FTP_PASSIVE_MODE")) != NULL &&
|
|
strncasecmp(s, "no", 2) != 0);
|
|
|
|
/* isolate filename */
|
|
filename = _ftp_filename(file, &filenamelen, &type);
|
|
|
|
/* set transfer mode and data type */
|
|
if ((e = _ftp_mode_type(conn, 0, type)) != FTP_OK)
|
|
goto ouch;
|
|
|
|
/* find our own address, bind, and listen */
|
|
l = sizeof(sa);
|
|
if (getsockname(conn->sd, (struct sockaddr *)&sa, &l) == -1)
|
|
goto sysouch;
|
|
if (sa.ss_family == AF_INET6)
|
|
unmappedaddr((struct sockaddr_in6 *)&sa);
|
|
|
|
/* open data socket */
|
|
if ((sd = socket(sa.ss_family, SOCK_STREAM, IPPROTO_TCP)) == -1) {
|
|
_fetch_syserr();
|
|
return (NULL);
|
|
}
|
|
|
|
if (pasv) {
|
|
u_char addr[64];
|
|
char *ln, *p;
|
|
unsigned int i;
|
|
int port;
|
|
|
|
/* send PASV command */
|
|
if (verbose)
|
|
_fetch_info("setting passive mode");
|
|
switch (sa.ss_family) {
|
|
case AF_INET:
|
|
if ((e = _ftp_cmd(conn, "PASV")) != FTP_PASSIVE_MODE)
|
|
goto ouch;
|
|
break;
|
|
case AF_INET6:
|
|
if ((e = _ftp_cmd(conn, "EPSV")) != FTP_EPASSIVE_MODE) {
|
|
if (e == -1)
|
|
goto ouch;
|
|
if ((e = _ftp_cmd(conn, "LPSV")) !=
|
|
FTP_LPASSIVE_MODE)
|
|
goto ouch;
|
|
}
|
|
break;
|
|
default:
|
|
e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */
|
|
goto ouch;
|
|
}
|
|
|
|
/*
|
|
* Find address and port number. The reply to the PASV command
|
|
* is IMHO the one and only weak point in the FTP protocol.
|
|
*/
|
|
ln = conn->buf;
|
|
switch (e) {
|
|
case FTP_PASSIVE_MODE:
|
|
case FTP_LPASSIVE_MODE:
|
|
for (p = ln + 3; *p && !isdigit(*p); p++)
|
|
/* nothing */ ;
|
|
if (!*p) {
|
|
e = FTP_PROTOCOL_ERROR;
|
|
goto ouch;
|
|
}
|
|
l = (e == FTP_PASSIVE_MODE ? 6 : 21);
|
|
for (i = 0; *p && i < l; i++, p++)
|
|
addr[i] = strtol(p, &p, 10);
|
|
if (i < l) {
|
|
e = FTP_PROTOCOL_ERROR;
|
|
goto ouch;
|
|
}
|
|
break;
|
|
case FTP_EPASSIVE_MODE:
|
|
for (p = ln + 3; *p && *p != '('; p++)
|
|
/* nothing */ ;
|
|
if (!*p) {
|
|
e = FTP_PROTOCOL_ERROR;
|
|
goto ouch;
|
|
}
|
|
++p;
|
|
if (sscanf(p, "%c%c%c%d%c", &addr[0], &addr[1], &addr[2],
|
|
&port, &addr[3]) != 5 ||
|
|
addr[0] != addr[1] ||
|
|
addr[0] != addr[2] || addr[0] != addr[3]) {
|
|
e = FTP_PROTOCOL_ERROR;
|
|
goto ouch;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* seek to required offset */
|
|
if (offset)
|
|
if (_ftp_cmd(conn, "REST %lu", (u_long)offset) != FTP_FILE_OK)
|
|
goto sysouch;
|
|
|
|
/* construct sockaddr for data socket */
|
|
l = sizeof(sa);
|
|
if (getpeername(conn->sd, (struct sockaddr *)&sa, &l) == -1)
|
|
goto sysouch;
|
|
if (sa.ss_family == AF_INET6)
|
|
unmappedaddr((struct sockaddr_in6 *)&sa);
|
|
switch (sa.ss_family) {
|
|
case AF_INET6:
|
|
sin6 = (struct sockaddr_in6 *)&sa;
|
|
if (e == FTP_EPASSIVE_MODE)
|
|
sin6->sin6_port = htons(port);
|
|
else {
|
|
#if __MOJOSETUP__
|
|
memmove((char *)&sin6->sin6_addr, addr + 2, 16);
|
|
memmove((char *)&sin6->sin6_port, addr + 19, 2);
|
|
#else
|
|
bcopy(addr + 2, (char *)&sin6->sin6_addr, 16);
|
|
bcopy(addr + 19, (char *)&sin6->sin6_port, 2);
|
|
#endif
|
|
}
|
|
break;
|
|
case AF_INET:
|
|
sin4 = (struct sockaddr_in *)&sa;
|
|
if (e == FTP_EPASSIVE_MODE)
|
|
sin4->sin_port = htons(port);
|
|
else {
|
|
#if __MOJOSETUP__
|
|
memmove((char *)&sin4->sin_addr, addr, 4);
|
|
memmove((char *)&sin4->sin_port, addr + 4, 2);
|
|
#else
|
|
bcopy(addr, (char *)&sin4->sin_addr, 4);
|
|
bcopy(addr + 4, (char *)&sin4->sin_port, 2);
|
|
#endif
|
|
}
|
|
break;
|
|
default:
|
|
e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */
|
|
break;
|
|
}
|
|
|
|
/* connect to data port */
|
|
if (verbose)
|
|
_fetch_info("opening data connection");
|
|
bindaddr = getenv("FETCH_BIND_ADDRESS");
|
|
if (bindaddr != NULL && *bindaddr != '\0' &&
|
|
_fetch_bind(sd, sa.ss_family, bindaddr) != 0)
|
|
goto sysouch;
|
|
#if __MOJOSETUP__
|
|
{
|
|
int socklen = sizeof (struct sockaddr_in);
|
|
if (sa.ss_family == AF_INET6)
|
|
socklen = sizeof (struct sockaddr_in6);
|
|
if (connect(sd, (struct sockaddr *)&sa, socklen) == -1)
|
|
goto sysouch;
|
|
}
|
|
#else
|
|
if (connect(sd, (struct sockaddr *)&sa, sa.ss_len) == -1)
|
|
goto sysouch;
|
|
#endif
|
|
|
|
/* make the server initiate the transfer */
|
|
if (verbose)
|
|
_fetch_info("initiating transfer");
|
|
e = _ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename);
|
|
if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION)
|
|
goto ouch;
|
|
|
|
} else {
|
|
u_int32_t a;
|
|
u_short p;
|
|
int arg, d;
|
|
char *ap;
|
|
char hname[INET6_ADDRSTRLEN];
|
|
|
|
#if __MOJOSETUP__
|
|
arg = 0;
|
|
#if FREEBSD
|
|
switch (sa.ss_family) {
|
|
case AF_INET6:
|
|
((struct sockaddr_in6 *)&sa)->sin6_port = 0;
|
|
#ifdef IPV6_PORTRANGE
|
|
arg = low ? IPV6_PORTRANGE_DEFAULT : IPV6_PORTRANGE_HIGH;
|
|
if (setsockopt(sd, IPPROTO_IPV6, IPV6_PORTRANGE,
|
|
(char *)&arg, sizeof(arg)) == -1)
|
|
goto sysouch;
|
|
#endif
|
|
break;
|
|
case AF_INET:
|
|
((struct sockaddr_in *)&sa)->sin_port = 0;
|
|
arg = low ? IP_PORTRANGE_DEFAULT : IP_PORTRANGE_HIGH;
|
|
if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE,
|
|
(char *)&arg, sizeof(arg)) == -1)
|
|
goto sysouch;
|
|
break;
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
if (verbose)
|
|
_fetch_info("binding data socket");
|
|
#if __MOJOSETUP__
|
|
{
|
|
int socklen = sizeof (struct sockaddr_in);
|
|
if (sa.ss_family == AF_INET6)
|
|
socklen = sizeof (struct sockaddr_in6);
|
|
if (bind(sd, (struct sockaddr *)&sa, socklen) == -1)
|
|
goto sysouch;
|
|
}
|
|
#else
|
|
if (bind(sd, (struct sockaddr *)&sa, sa.ss_len) == -1)
|
|
goto sysouch;
|
|
#endif
|
|
if (listen(sd, 1) == -1)
|
|
goto sysouch;
|
|
|
|
/* find what port we're on and tell the server */
|
|
if (getsockname(sd, (struct sockaddr *)&sa, &l) == -1)
|
|
goto sysouch;
|
|
switch (sa.ss_family) {
|
|
case AF_INET:
|
|
sin4 = (struct sockaddr_in *)&sa;
|
|
a = ntohl(sin4->sin_addr.s_addr);
|
|
p = ntohs(sin4->sin_port);
|
|
e = _ftp_cmd(conn, "PORT %d,%d,%d,%d,%d,%d",
|
|
(a >> 24) & 0xff, (a >> 16) & 0xff,
|
|
(a >> 8) & 0xff, a & 0xff,
|
|
(p >> 8) & 0xff, p & 0xff);
|
|
break;
|
|
case AF_INET6:
|
|
#define UC(b) (((int)b)&0xff)
|
|
e = -1;
|
|
sin6 = (struct sockaddr_in6 *)&sa;
|
|
sin6->sin6_scope_id = 0;
|
|
#if __MOJOSETUP__
|
|
if (getnameinfo((struct sockaddr *)&sa, sizeof (struct sockaddr_in6),
|
|
#else
|
|
if (getnameinfo((struct sockaddr *)&sa, sa.ss_len,
|
|
#endif
|
|
hname, sizeof(hname),
|
|
NULL, 0, NI_NUMERICHOST) == 0) {
|
|
e = _ftp_cmd(conn, "EPRT |%d|%s|%d|", 2, hname,
|
|
htons(sin6->sin6_port));
|
|
if (e == -1)
|
|
goto ouch;
|
|
}
|
|
if (e != FTP_OK) {
|
|
ap = (char *)&sin6->sin6_addr;
|
|
e = _ftp_cmd(conn,
|
|
"LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
|
|
6, 16,
|
|
UC(ap[0]), UC(ap[1]), UC(ap[2]), UC(ap[3]),
|
|
UC(ap[4]), UC(ap[5]), UC(ap[6]), UC(ap[7]),
|
|
UC(ap[8]), UC(ap[9]), UC(ap[10]), UC(ap[11]),
|
|
UC(ap[12]), UC(ap[13]), UC(ap[14]), UC(ap[15]),
|
|
2,
|
|
(ntohs(sin6->sin6_port) >> 8) & 0xff,
|
|
ntohs(sin6->sin6_port) & 0xff);
|
|
}
|
|
break;
|
|
default:
|
|
e = FTP_PROTOCOL_ERROR; /* XXX: error code should be prepared */
|
|
goto ouch;
|
|
}
|
|
if (e != FTP_OK)
|
|
goto ouch;
|
|
|
|
/* seek to required offset */
|
|
if (offset)
|
|
if (_ftp_cmd(conn, "REST %ju", (uintmax_t)offset) != FTP_FILE_OK)
|
|
goto sysouch;
|
|
|
|
/* make the server initiate the transfer */
|
|
if (verbose)
|
|
_fetch_info("initiating transfer");
|
|
e = _ftp_cmd(conn, "%s %.*s", oper, filenamelen, filename);
|
|
if (e != FTP_CONNECTION_ALREADY_OPEN && e != FTP_OPEN_DATA_CONNECTION)
|
|
goto ouch;
|
|
|
|
/* accept the incoming connection and go to town */
|
|
if ((d = accept(sd, NULL, NULL)) == -1)
|
|
goto sysouch;
|
|
close(sd);
|
|
sd = d;
|
|
}
|
|
|
|
if ((df = _ftp_setup(conn, _fetch_reopen(sd), mode)) == NULL)
|
|
goto sysouch;
|
|
return (df);
|
|
|
|
sysouch:
|
|
_fetch_syserr();
|
|
if (sd >= 0)
|
|
close(sd);
|
|
return (NULL);
|
|
|
|
ouch:
|
|
if (e != -1)
|
|
_ftp_seterr(e);
|
|
if (sd >= 0)
|
|
close(sd);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Authenticate
|
|
*/
|
|
static int
|
|
_ftp_authenticate(conn_t *conn, struct url *url, struct url *purl)
|
|
{
|
|
const char *user, *pwd, *logname;
|
|
char pbuf[MAXHOSTNAMELEN + MAXLOGNAME + 1];
|
|
int e, len;
|
|
|
|
/* XXX FTP_AUTH, and maybe .netrc */
|
|
|
|
/* send user name and password */
|
|
if (url->user[0] == '\0')
|
|
_fetch_netrc_auth(url);
|
|
user = url->user;
|
|
if (*user == '\0')
|
|
user = getenv("FTP_LOGIN");
|
|
if (user == NULL || *user == '\0')
|
|
user = FTP_ANONYMOUS_USER;
|
|
if (purl && url->port == _fetch_default_port(url->scheme))
|
|
e = _ftp_cmd(conn, "USER %s@%s", user, url->host);
|
|
else if (purl)
|
|
e = _ftp_cmd(conn, "USER %s@%s@%d", user, url->host, url->port);
|
|
else
|
|
e = _ftp_cmd(conn, "USER %s", user);
|
|
|
|
/* did the server request a password? */
|
|
if (e == FTP_NEED_PASSWORD) {
|
|
pwd = url->pwd;
|
|
if (*pwd == '\0')
|
|
pwd = getenv("FTP_PASSWORD");
|
|
if (pwd == NULL || *pwd == '\0') {
|
|
if ((logname = getlogin()) == 0)
|
|
logname = FTP_ANONYMOUS_USER;
|
|
if ((len = snprintf(pbuf, MAXLOGNAME + 1, "%s@", logname)) < 0)
|
|
len = 0;
|
|
else if (len > MAXLOGNAME)
|
|
len = MAXLOGNAME;
|
|
gethostname(pbuf + len, sizeof(pbuf) - len);
|
|
pwd = pbuf;
|
|
}
|
|
e = _ftp_cmd(conn, "PASS %s", pwd);
|
|
}
|
|
|
|
return (e);
|
|
}
|
|
|
|
/*
|
|
* Log on to FTP server
|
|
*/
|
|
static conn_t *
|
|
_ftp_connect(struct url *url, struct url *purl, const char *flags)
|
|
{
|
|
conn_t *conn;
|
|
int e, direct, verbose;
|
|
#ifdef INET6
|
|
int af = AF_UNSPEC;
|
|
#else
|
|
int af = AF_INET;
|
|
#endif
|
|
|
|
direct = CHECK_FLAG('d');
|
|
verbose = CHECK_FLAG('v');
|
|
if (CHECK_FLAG('4'))
|
|
af = AF_INET;
|
|
else if (CHECK_FLAG('6'))
|
|
af = AF_INET6;
|
|
|
|
if (direct)
|
|
purl = NULL;
|
|
|
|
/* check for proxy */
|
|
if (purl) {
|
|
/* XXX proxy authentication! */
|
|
conn = _fetch_connect(purl->host, purl->port, af, verbose);
|
|
} else {
|
|
/* no proxy, go straight to target */
|
|
conn = _fetch_connect(url->host, url->port, af, verbose);
|
|
purl = NULL;
|
|
}
|
|
|
|
/* check connection */
|
|
if (conn == NULL)
|
|
/* _fetch_connect() has already set an error code */
|
|
return (NULL);
|
|
|
|
/* expect welcome message */
|
|
if ((e = _ftp_chkerr(conn)) != FTP_SERVICE_READY)
|
|
goto fouch;
|
|
|
|
/* authenticate */
|
|
if ((e = _ftp_authenticate(conn, url, purl)) != FTP_LOGGED_IN)
|
|
goto fouch;
|
|
|
|
/* TODO: Request extended features supported, if any (RFC 3659). */
|
|
|
|
/* done */
|
|
return (conn);
|
|
|
|
fouch:
|
|
if (e != -1)
|
|
_ftp_seterr(e);
|
|
_fetch_close(conn);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Disconnect from server
|
|
*/
|
|
static void
|
|
_ftp_disconnect(conn_t *conn)
|
|
{
|
|
(void)_ftp_cmd(conn, "QUIT");
|
|
if (conn == cached_connection && conn->ref == 1)
|
|
cached_connection = NULL;
|
|
_fetch_close(conn);
|
|
}
|
|
|
|
/*
|
|
* Check if we're already connected
|
|
*/
|
|
static int
|
|
_ftp_isconnected(struct url *url)
|
|
{
|
|
return (cached_connection
|
|
&& (strcmp(url->host, cached_host.host) == 0)
|
|
&& (strcmp(url->user, cached_host.user) == 0)
|
|
&& (strcmp(url->pwd, cached_host.pwd) == 0)
|
|
&& (url->port == cached_host.port));
|
|
}
|
|
|
|
/*
|
|
* Check the cache, reconnect if no luck
|
|
*/
|
|
static conn_t *
|
|
_ftp_cached_connect(struct url *url, struct url *purl, const char *flags)
|
|
{
|
|
conn_t *conn;
|
|
int e;
|
|
|
|
/* set default port */
|
|
if (!url->port)
|
|
url->port = _fetch_default_port(url->scheme);
|
|
|
|
/* try to use previously cached connection */
|
|
if (_ftp_isconnected(url)) {
|
|
e = _ftp_cmd(cached_connection, "NOOP");
|
|
if (e == FTP_OK || e == FTP_SYNTAX_ERROR)
|
|
return (_fetch_ref(cached_connection));
|
|
}
|
|
|
|
/* connect to server */
|
|
if ((conn = _ftp_connect(url, purl, flags)) == NULL)
|
|
return (NULL);
|
|
if (cached_connection)
|
|
_ftp_disconnect(cached_connection);
|
|
cached_connection = _fetch_ref(conn);
|
|
memcpy(&cached_host, url, sizeof(*url));
|
|
return (conn);
|
|
}
|
|
|
|
/*
|
|
* Check the proxy settings
|
|
*/
|
|
static struct url *
|
|
_ftp_get_proxy(const char *flags)
|
|
{
|
|
struct url *purl;
|
|
char *p;
|
|
|
|
if (flags != NULL && strchr(flags, 'd') != NULL)
|
|
return (NULL);
|
|
if (((p = getenv("FTP_PROXY")) || (p = getenv("ftp_proxy")) ||
|
|
(p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) &&
|
|
*p && (purl = fetchParseURL(p)) != NULL) {
|
|
if (!*purl->scheme) {
|
|
if (getenv("FTP_PROXY") || getenv("ftp_proxy"))
|
|
strcpy(purl->scheme, SCHEME_FTP);
|
|
else
|
|
strcpy(purl->scheme, SCHEME_HTTP);
|
|
}
|
|
if (!purl->port)
|
|
purl->port = _fetch_default_proxy_port(purl->scheme);
|
|
if (strcasecmp(purl->scheme, SCHEME_FTP) == 0 ||
|
|
strcasecmp(purl->scheme, SCHEME_HTTP) == 0)
|
|
return (purl);
|
|
fetchFreeURL(purl);
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Process an FTP request
|
|
*/
|
|
#if __MOJOSETUP__
|
|
MojoInput *
|
|
#else
|
|
FILE *
|
|
#endif
|
|
_ftp_request(struct url *url, const char *op, struct url_stat *us,
|
|
struct url *purl, const char *flags)
|
|
{
|
|
conn_t *conn;
|
|
int oflag;
|
|
|
|
/* check if we should use HTTP instead */
|
|
#if !__MOJOSETUP__
|
|
if (purl && strcasecmp(purl->scheme, SCHEME_HTTP) == 0) {
|
|
if (strcmp(op, "STAT") == 0)
|
|
return (_http_request(url, "HEAD", us, purl, flags));
|
|
else if (strcmp(op, "RETR") == 0)
|
|
return (_http_request(url, "GET", us, purl, flags));
|
|
/*
|
|
* Our HTTP code doesn't support PUT requests yet, so try
|
|
* a direct connection.
|
|
*/
|
|
}
|
|
#endif
|
|
|
|
/* connect to server */
|
|
conn = _ftp_cached_connect(url, purl, flags);
|
|
if (purl)
|
|
fetchFreeURL(purl);
|
|
if (conn == NULL)
|
|
return (NULL);
|
|
|
|
/* change directory */
|
|
if (_ftp_cwd(conn, url->doc) == -1)
|
|
return (NULL);
|
|
|
|
/* stat file */
|
|
if (us && _ftp_stat(conn, url->doc, us) == -1
|
|
&& fetchLastErrCode != FETCH_PROTO
|
|
&& fetchLastErrCode != FETCH_UNAVAIL)
|
|
return (NULL);
|
|
|
|
/* just a stat */
|
|
#if __MOJOSETUP__
|
|
if (strcmp(op, "STAT") == 0)
|
|
return (MojoInput *)1; /* bogus return value */
|
|
#else
|
|
if (strcmp(op, "STAT") == 0)
|
|
return (FILE *)1; /* bogus return value */
|
|
#endif
|
|
if (strcmp(op, "STOR") == 0 || strcmp(op, "APPE") == 0)
|
|
oflag = O_WRONLY;
|
|
else
|
|
oflag = O_RDONLY;
|
|
|
|
/* initiate the transfer */
|
|
#if __MOJOSETUP__
|
|
{
|
|
MojoInput *retval = _ftp_transfer(conn, op, url->doc, oflag, url->offset, flags);
|
|
if ((retval != NULL) && (us != NULL))
|
|
{
|
|
struct ftpio *io = (struct ftpio *)retval->opaque;
|
|
io->length = us->size;
|
|
} // if
|
|
return retval;
|
|
}
|
|
#else
|
|
return (_ftp_transfer(conn, op, url->doc, oflag, url->offset, flags));
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Get and stat file
|
|
*/
|
|
#if __MOJOSETUP__
|
|
MojoInput *
|
|
#else
|
|
FILE *
|
|
#endif
|
|
fetchXGetFTP(struct url *url, struct url_stat *us, const char *flags)
|
|
{
|
|
return (_ftp_request(url, "RETR", us, _ftp_get_proxy(flags), flags));
|
|
}
|
|
|
|
/*
|
|
* Get file
|
|
*/
|
|
#if !__MOJOSETUP__
|
|
FILE *
|
|
fetchGetFTP(struct url *url, const char *flags)
|
|
{
|
|
return (fetchXGetFTP(url, NULL, flags));
|
|
}
|
|
|
|
/*
|
|
* Put file
|
|
*/
|
|
FILE *
|
|
fetchPutFTP(struct url *url, const char *flags)
|
|
{
|
|
|
|
return (_ftp_request(url, CHECK_FLAG('a') ? "APPE" : "STOR", NULL,
|
|
_ftp_get_proxy(flags), flags));
|
|
}
|
|
|
|
/*
|
|
* Get file stats
|
|
*/
|
|
int
|
|
fetchStatFTP(struct url *url, struct url_stat *us, const char *flags)
|
|
{
|
|
FILE *f;
|
|
|
|
f = _ftp_request(url, "STAT", us, _ftp_get_proxy(flags), flags);
|
|
if (f == NULL)
|
|
return (-1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* List a directory
|
|
*/
|
|
struct url_ent *
|
|
fetchListFTP(struct url *url __unused, const char *flags __unused)
|
|
{
|
|
warnx("fetchListFTP(): not implemented");
|
|
return (NULL);
|
|
}
|
|
|
|
#endif
|
|
#endif
|
|
|