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/**
* 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;
}
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