You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.0 KiB
74 lines
2.0 KiB
/**
|
|
* xrdp: A Remote Desktop Protocol server.
|
|
*
|
|
* Copyright (C) Laxmikant Rashinkar 2009-2014
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "chansrv_common.h"
|
|
|
|
/**
|
|
* Assemble fragmented incoming packets into one stream
|
|
*
|
|
* @param src stream that contains partial data
|
|
* @param dest stream that contains entire data
|
|
* @param chan_flags fragmentation flags
|
|
* @param length bytes in this packet
|
|
* @param total_length total length of assembled packet
|
|
*
|
|
* @return 1 when all data has been assembled, 0 otherwise
|
|
*
|
|
* NOTE: it is the responsibility of the caller to free dest stream
|
|
****************************************************************************/
|
|
int
|
|
read_entire_packet(struct stream *src, struct stream **dest, int chan_flags,
|
|
int length, int total_length)
|
|
{
|
|
struct stream *ls;
|
|
|
|
if ((chan_flags & 3) == 3)
|
|
{
|
|
/* packet not fragmented */
|
|
xstream_new(ls, total_length);
|
|
xstream_copyin(ls, src->p, length);
|
|
ls->p = ls->data;
|
|
*dest = ls;
|
|
return 1;
|
|
}
|
|
|
|
/* is this the first fragmented packet? */
|
|
if (chan_flags & 1)
|
|
{
|
|
xstream_new(ls, total_length);
|
|
*dest = ls;
|
|
}
|
|
else
|
|
{
|
|
ls = *dest;
|
|
}
|
|
|
|
xstream_copyin(ls, src->p, length);
|
|
|
|
/* in last packet, chan_flags & 0x02 will be true */
|
|
if (chan_flags & 0x02)
|
|
{
|
|
/* rewind stream */
|
|
ls->p = ls->data;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|