/*
* Copyright (c) 2001,2002 Damien Miller. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* XXX: memleaks */
/* XXX: signed vs unsigned */
/* XXX: remove all logging, only return status codes */
/* XXX: copy between two remote sites */
#include "includes.h"
RCSID("$OpenBSD: sftp-client.c,v 1.32 2002/06/09 13:32:01 markus Exp $");
#include "openbsd-compat/fake-queue.h"
#include "buffer.h"
#include "bufaux.h"
#include "getput.h"
#include "xmalloc.h"
#include "log.h"
#include "atomicio.h"
#include "sftp.h"
#include "sftp-common.h"
#include "sftp-client.h"
/* Minimum amount of data to read at at time */
#define MIN_READ_SIZE 512
struct sftp_conn {
int fd_in;
int fd_out;
u_int transfer_buflen;
u_int num_requests;
u_int version;
u_int msg_id;
};
static void
send_msg(int fd, Buffer *m)
{
int mlen = buffer_len(m);
int len;
Buffer oqueue;
buffer_init(&oqueue);
buffer_put_int(&oqueue, mlen);
buffer_append(&oqueue, buffer_ptr(m), mlen);
buffer_consume(m, mlen);
len = atomicio(write, fd, buffer_ptr(&oqueue), buffer_len(&oqueue));
if (len <= 0)
fatal("Couldn't send packet: %s", strerror(errno));
buffer_free(&oqueue);
}
static void
get_msg(int fd, Buffer *m)
{
u_int len, msg_len;
unsigned char buf[4096];
len = atomicio(read, fd, buf, 4);
if (len == 0)
fatal("Connection closed");
else if (len == -1)
fatal("Couldn't read packet: %s", strerror(errno));
msg_len = GET_32BIT(buf);
if (msg_len > 256 * 1024)
fatal("Received message too long %d", msg_len);
while (msg_len) {
len = atomicio(read, fd, buf, MIN(msg_len, sizeof(buf)));
if (len == 0)
fatal("Connection closed");
else if (len == -1)
fatal("Couldn't read packet: %s", strerror(errno));
msg_len -= len;
buffer_append(m, buf, len);
}
}
static void
send_string_request(int fd, u_int id, u_int code, char *s,
u_int len)
{
Buffer msg;
buffer_init(&msg);
buffer_put_char(&msg, code);
buffer_put_int(&msg, id);
buffer_put_string(&msg, s, len);
send_msg(fd, &msg);
debug3("Sent message fd %d T:%d I:%d", fd, code, id);
buffer_free(&msg);
}
static void
send_string_attrs_request(int fd, u_int id, u_int code, char *s,