FreeRDP/libfreerdp/core/channel.c

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/**
2012-10-09 07:02:04 +04:00
* FreeRDP: A Remote Desktop Protocol Implementation
* Virtual Channels
*
* Copyright 2011 Vic Lee
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <freerdp/freerdp.h>
#include <freerdp/peer.h>
#include <freerdp/constants.h>
#include <freerdp/utils/memory.h>
#include <freerdp/utils/stream.h>
#include "rdp.h"
#include "channel.h"
boolean freerdp_channel_send(rdpRdp* rdp, uint16 channel_id, uint8* data, int size)
{
STREAM* s;
uint32 flags;
int i, left;
int chunk_size;
rdpChannel* channel = NULL;
for (i = 0; i < rdp->settings->num_channels; i++)
{
if (rdp->settings->channels[i].channel_id == channel_id)
{
channel = &rdp->settings->channels[i];
break;
}
}
if (channel == NULL)
{
printf("freerdp_channel_send: unknown channel_id %d\n", channel_id);
return false;
}
flags = CHANNEL_FLAG_FIRST;
left = size;
while (left > 0)
{
s = rdp_send_stream_init(rdp);
if (left > (int) rdp->settings->vc_chunk_size)
{
chunk_size = rdp->settings->vc_chunk_size;
}
else
{
chunk_size = left;
flags |= CHANNEL_FLAG_LAST;
}
if ((channel->options & CHANNEL_OPTION_SHOW_PROTOCOL))
{
flags |= CHANNEL_FLAG_SHOW_PROTOCOL;
}
stream_write_uint32(s, size);
stream_write_uint32(s, flags);
stream_check_size(s, chunk_size);
stream_write(s, data, chunk_size);
rdp_send(rdp, s, channel_id);
data += chunk_size;
left -= chunk_size;
flags = 0;
}
return true;
}
void freerdp_channel_process(freerdp* instance, STREAM* s, uint16 channel_id)
{
uint32 length;
uint32 flags;
int chunk_length;
stream_read_uint32(s, length);
stream_read_uint32(s, flags);
chunk_length = stream_get_left(s);
IFCALL(instance->ReceiveChannelData, instance,
channel_id, stream_get_tail(s), chunk_length, flags, length);
}
void freerdp_channel_peer_process(freerdp_peer* client, STREAM* s, uint16 channel_id)
{
uint32 length;
uint32 flags;
int chunk_length;
stream_read_uint32(s, length);
stream_read_uint32(s, flags);
chunk_length = stream_get_left(s);
IFCALL(client->ReceiveChannelData, client,
channel_id, stream_get_tail(s), chunk_length, flags, length);
}