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