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Diffstat (limited to 'libxrdp/xrdp_channel.c')
-rw-r--r--libxrdp/xrdp_channel.c254
1 files changed, 133 insertions, 121 deletions
diff --git a/libxrdp/xrdp_channel.c b/libxrdp/xrdp_channel.c
index 2b3d23a5..6f40b751 100644
--- a/libxrdp/xrdp_channel.c
+++ b/libxrdp/xrdp_channel.c
@@ -1,24 +1,22 @@
-/*
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- xrdp: A Remote Desktop Protocol server.
- Copyright (C) Jay Sorg 2006-2010
-
- channel layer
-
-*/
+/**
+ * xrdp: A Remote Desktop Protocol server.
+ *
+ * Copyright (C) Jay Sorg 2006-2012
+ *
+ * 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.
+ *
+ * channel layer
+ */
#include "libxrdp.h"
@@ -31,86 +29,96 @@
/*****************************************************************************/
/* returns pointer or nil on error */
-static struct mcs_channel_item* APP_CC
-xrdp_channel_get_item(struct xrdp_channel* self, int channel_id)
+static struct mcs_channel_item *APP_CC
+xrdp_channel_get_item(struct xrdp_channel *self, int channel_id)
{
- struct mcs_channel_item* channel;
- if(self->mcs_layer->channel_list==NULL)
- {
- g_writeln("xrdp_channel_get_item - No channel initialized");
- return NULL ;
- }
- channel = (struct mcs_channel_item*)
- list_get_item(self->mcs_layer->channel_list, channel_id);
- return channel;
+ struct mcs_channel_item *channel;
+
+ if (self->mcs_layer->channel_list == NULL)
+ {
+ g_writeln("xrdp_channel_get_item - No channel initialized");
+ return NULL ;
+ }
+
+ channel = (struct mcs_channel_item *)
+ list_get_item(self->mcs_layer->channel_list, channel_id);
+ return channel;
}
/*****************************************************************************/
-struct xrdp_channel* APP_CC
-xrdp_channel_create(struct xrdp_sec* owner, struct xrdp_mcs* mcs_layer)
+struct xrdp_channel *APP_CC
+xrdp_channel_create(struct xrdp_sec *owner, struct xrdp_mcs *mcs_layer)
{
- struct xrdp_channel* self;
+ struct xrdp_channel *self;
- self = (struct xrdp_channel*)g_malloc(sizeof(struct xrdp_channel), 1);
- self->sec_layer = owner;
- self->mcs_layer = mcs_layer;
- return self;
+ self = (struct xrdp_channel *)g_malloc(sizeof(struct xrdp_channel), 1);
+ self->sec_layer = owner;
+ self->mcs_layer = mcs_layer;
+ return self;
}
/*****************************************************************************/
/* returns error */
void APP_CC
-xrdp_channel_delete(struct xrdp_channel* self)
+xrdp_channel_delete(struct xrdp_channel *self)
{
- if (self == 0)
- {
- return;
- }
- g_memset(self,0,sizeof(struct xrdp_channel));
- g_free(self);
+ if (self == 0)
+ {
+ return;
+ }
+
+ g_memset(self, 0, sizeof(struct xrdp_channel));
+ g_free(self);
}
/*****************************************************************************/
/* returns error */
int APP_CC
-xrdp_channel_init(struct xrdp_channel* self, struct stream* s)
+xrdp_channel_init(struct xrdp_channel *self, struct stream *s)
{
- if (xrdp_sec_init(self->sec_layer, s) != 0)
- {
- return 1;
- }
- s_push_layer(s, channel_hdr, 8);
- return 0;
+ if (xrdp_sec_init(self->sec_layer, s) != 0)
+ {
+ return 1;
+ }
+
+ s_push_layer(s, channel_hdr, 8);
+ return 0;
}
/*****************************************************************************/
/* returns error */
/* This sends data out to the secure layer. */
int APP_CC
-xrdp_channel_send(struct xrdp_channel* self, struct stream* s, int channel_id,
+xrdp_channel_send(struct xrdp_channel *self, struct stream *s, int channel_id,
int total_data_len, int flags)
{
- struct mcs_channel_item* channel;
-
- channel = xrdp_channel_get_item(self, channel_id);
- if (channel == NULL)
- {
- g_writeln("xrdp_channel_send - no such channel");
- return 1;
- }
- s_pop_layer(s, channel_hdr);
- out_uint32_le(s, total_data_len);
- if (channel->flags & XR_CHANNEL_OPTION_SHOW_PROTOCOL)
- {
- flags |= CHANNEL_FLAG_SHOW_PROTOCOL;
- }
- out_uint32_le(s, flags);
- if (xrdp_sec_send(self->sec_layer, s, channel->chanid) != 0)
- {
- g_writeln("xrdp_channel_send - failure sending data");
- return 1;
- }
- return 0;
+ struct mcs_channel_item *channel;
+
+ channel = xrdp_channel_get_item(self, channel_id);
+
+ if (channel == NULL)
+ {
+ g_writeln("xrdp_channel_send - no such channel");
+ return 1;
+ }
+
+ s_pop_layer(s, channel_hdr);
+ out_uint32_le(s, total_data_len);
+
+ if (channel->flags & XR_CHANNEL_OPTION_SHOW_PROTOCOL)
+ {
+ flags |= CHANNEL_FLAG_SHOW_PROTOCOL;
+ }
+
+ out_uint32_le(s, flags);
+
+ if (xrdp_sec_send(self->sec_layer, s, channel->chanid) != 0)
+ {
+ g_writeln("xrdp_channel_send - failure sending data");
+ return 1;
+ }
+
+ return 0;
}
/*****************************************************************************/
@@ -118,36 +126,38 @@ xrdp_channel_send(struct xrdp_channel* self, struct stream* s, int channel_id,
/* this will inform the callback, whatever it is that some channel data is
ready. the default for this is a call to xrdp_wm.c. */
static int APP_CC
-xrdp_channel_call_callback(struct xrdp_channel* self, struct stream* s,
+xrdp_channel_call_callback(struct xrdp_channel *self, struct stream *s,
int channel_id,
int total_data_len, int flags)
{
- struct xrdp_session* session;
- int rv;
- int size;
-
- rv = 0;
- session = self->sec_layer->rdp_layer->session;
- if (session != 0)
- {
- if (session->callback != 0)
+ struct xrdp_session *session;
+ int rv;
+ int size;
+
+ rv = 0;
+ session = self->sec_layer->rdp_layer->session;
+
+ if (session != 0)
{
- size = (int)(s->end - s->p);
- /* in xrdp_wm.c */
- rv = session->callback(session->id, 0x5555,
- MAKELONG(channel_id, flags),
- size, (tbus)(s->p), total_data_len);
+ if (session->callback != 0)
+ {
+ size = (int)(s->end - s->p);
+ /* in xrdp_wm.c */
+ rv = session->callback(session->id, 0x5555,
+ MAKELONG(channel_id, flags),
+ size, (tbus)(s->p), total_data_len);
+ }
+ else
+ {
+ g_writeln("in xrdp_channel_call_callback, session->callback is nil");
+ }
}
else
{
- g_writeln("in xrdp_channel_call_callback, session->callback is nil");
+ g_writeln("in xrdp_channel_call_callback, session is nil");
}
- }
- else
- {
- g_writeln("in xrdp_channel_call_callback, session is nil");
- }
- return rv;
+
+ return rv;
}
/*****************************************************************************/
@@ -157,30 +167,32 @@ xrdp_channel_call_callback(struct xrdp_channel* self, struct stream* s,
'chanid' passed in here is the mcs channel id so it MCS_GLOBAL_CHANNEL
plus something. */
int APP_CC
-xrdp_channel_process(struct xrdp_channel* self, struct stream* s,
+xrdp_channel_process(struct xrdp_channel *self, struct stream *s,
int chanid)
{
- int length;
- int flags;
- int rv;
- int channel_id;
- struct mcs_channel_item* channel;
-
-
- /* this assumes that the channels are in order of chanid(mcs channel id)
- but they should be, see xrdp_sec_process_mcs_data_channels
- the first channel should be MCS_GLOBAL_CHANNEL + 1, second
- one should be MCS_GLOBAL_CHANNEL + 2, and so on */
- channel_id = (chanid - MCS_GLOBAL_CHANNEL) - 1;
- channel = xrdp_channel_get_item(self, channel_id);
- if (channel == NULL)
- {
- g_writeln("xrdp_channel_process, channel not found");
- return 1;
- }
- rv = 0;
- in_uint32_le(s, length);
- in_uint32_le(s, flags);
- rv = xrdp_channel_call_callback(self, s, channel_id, length, flags);
- return rv;
+ int length;
+ int flags;
+ int rv;
+ int channel_id;
+ struct mcs_channel_item *channel;
+
+
+ /* this assumes that the channels are in order of chanid(mcs channel id)
+ but they should be, see xrdp_sec_process_mcs_data_channels
+ the first channel should be MCS_GLOBAL_CHANNEL + 1, second
+ one should be MCS_GLOBAL_CHANNEL + 2, and so on */
+ channel_id = (chanid - MCS_GLOBAL_CHANNEL) - 1;
+ channel = xrdp_channel_get_item(self, channel_id);
+
+ if (channel == NULL)
+ {
+ g_writeln("xrdp_channel_process, channel not found");
+ return 1;
+ }
+
+ rv = 0;
+ in_uint32_le(s, length);
+ in_uint32_le(s, flags);
+ rv = xrdp_channel_call_callback(self, s, channel_id, length, flags);
+ return rv;
}
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