libxrdp: started adding RAIL support

5 files changed, 680 insertions, 2 deletions

diff --git a/libxrdp/Makefile.am b/libxrdp/Makefile.am
index 08fb7130..ad891bd8 100644
--- a/libxrdp/Makefile.am
+++ b/libxrdp/Makefile.am
@@ -50,7 +50,8 @@ libxrdp_la_SOURCES = \
   xrdp_sec.c \
   xrdp_tcp.c \
   xrdp_bitmap_compress.c \
-  xrdp_jpeg_compress.c
+  xrdp_jpeg_compress.c \
+  xrdp_orders_rail.c
 
 libxrdp_la_LDFLAGS = \
   $(EXTRA_FLAGS)
diff --git a/libxrdp/libxrdp.h b/libxrdp/libxrdp.h
index 7aae38b5..7792d157 100644
--- a/libxrdp/libxrdp.h
+++ b/libxrdp/libxrdp.h
@@ -325,6 +325,8 @@ xrdp_orders_send(struct xrdp_orders* self);
 int APP_CC
 xrdp_orders_force_send(struct xrdp_orders* self);
 int APP_CC
+xrdp_orders_check(struct xrdp_orders* self, int max_size);
+int APP_CC
 xrdp_orders_rect(struct xrdp_orders* self, int x, int y, int cx, int cy,
                  int color, struct xrdp_rect* rect);
 int APP_CC
diff --git a/libxrdp/xrdp_orders.c b/libxrdp/xrdp_orders.c
index cff1324a..d068c39a 100644
--- a/libxrdp/xrdp_orders.c
+++ b/libxrdp/xrdp_orders.c
@@ -152,7 +152,7 @@ xrdp_orders_force_send(struct xrdp_orders* self)
 /* check if the current order will fit in packet size of 16384, if not */
 /* send what we got and init a new one */
 /* returns error */
-static int APP_CC
+int APP_CC
 xrdp_orders_check(struct xrdp_orders* self, int max_size)
 {
   int size;
diff --git a/libxrdp/xrdp_orders_rail.c b/libxrdp/xrdp_orders_rail.c
new file mode 100644
index 00000000..087cf42e
--- /dev/null
+++ b/libxrdp/xrdp_orders_rail.c
@@ -0,0 +1,625 @@
+/**
+ * xrdp: A Remote Desktop Protocol server.
+ *
+ * Copyright (C) Jay Sorg 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.
+ */
+
+#include "libxrdp.h"
+#include "rail.h"
+
+/* [MS-RDPERP]: Remote Desktop Protocol:
+   Remote Programs Virtual Channel Extension
+   http://msdn.microsoft.com/en-us/library/cc242568(v=prot.10) */
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+int APP_CC
+xrdp_orders_send_window_delete(struct xrdp_orders* self, int window_id)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+
+  order_size = 11;
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  field_present_flags = WINDOW_ORDER_TYPE_WINDOW | WINDOW_ORDER_STATE_DELETED;
+  out_uint32_le(self->out_s, field_present_flags);
+  /* windowId (4 bytes) */
+  out_uint32_le(self->out_s, window_id);
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+/* flags can contain WINDOW_ORDER_STATE_NEW and/or
+   WINDOW_ORDER_FIELD_ICON_BIG */
+int APP_CC
+xrdp_orders_send_window_cached_icon(struct xrdp_orders* self,
+                                    int window_id, int cache_entry,
+                                    int cache_id, int flags)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+
+  order_size = 14;
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  field_present_flags = flags | WINDOW_ORDER_TYPE_WINDOW |
+      WINDOW_ORDER_CACHED_ICON;
+  out_uint32_le(self->out_s, field_present_flags);
+  /* windowId (4 bytes) */
+  out_uint32_le(self->out_s, window_id);
+  /* CacheEntry (2 bytes) */
+  out_uint16_le(self->out_s, cache_entry);
+  /* CacheId (1 byte) */
+  out_uint8(self->out_s, cache_id);
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+static int APP_CC
+xrdp_orders_send_ts_icon(struct stream* s, int cache_entry, int cache_id,
+                         struct rail_icon_info* icon_info)
+{
+  int use_cmap;
+
+  use_cmap = 0;
+  if ((icon_info->bpp == 1) || (icon_info->bpp == 2) || (icon_info->bpp == 4))
+  {
+    use_cmap = 1;
+  }
+
+  /* TS_ICON_INFO */
+  out_uint16_le(s, cache_entry);
+  out_uint8(s, cache_id);
+  out_uint8(s, icon_info->bpp);
+  out_uint16_le(s, icon_info->width);
+  out_uint16_le(s, icon_info->height);
+  if (use_cmap)
+  {
+    out_uint16_le(s, icon_info->cmap_bytes);
+  }
+  out_uint16_le(s, icon_info->mask_bytes);
+  out_uint16_le(s, icon_info->data_bytes);
+  out_uint8p(s, icon_info->mask, icon_info->mask_bytes);
+  if (use_cmap)
+  {
+    out_uint8p(s, icon_info->cmap, icon_info->cmap_bytes);
+  }
+  out_uint8p(s, icon_info->data, icon_info->data_bytes);
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+/* flags can contain WINDOW_ORDER_STATE_NEW and/or
+   WINDOW_ORDER_FIELD_ICON_BIG */
+int APP_CC
+xrdp_orders_send_window_icon(struct xrdp_orders* self,
+                             int window_id, int cache_entry, int cache_id,
+                             struct rail_icon_info* icon_info,
+                             int flags)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+  int use_cmap;
+
+  use_cmap = 0;
+  if ((icon_info->bpp == 1) || (icon_info->bpp == 2) || (icon_info->bpp == 4))
+  {
+    use_cmap = 1;
+  }
+  order_size = 23 + icon_info->mask_bytes + icon_info->data_bytes;
+  if (use_cmap)
+  {
+    order_size += icon_info->cmap_bytes + 2;
+  }
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  field_present_flags = flags | WINDOW_ORDER_TYPE_WINDOW |
+      WINDOW_ORDER_ICON;
+  out_uint32_le(self->out_s, field_present_flags);
+  /* windowId (4 bytes) */
+  out_uint32_le(self->out_s, window_id);
+
+  xrdp_orders_send_ts_icon(self->out_s, cache_entry, cache_id, icon_info);
+
+  return 0;
+}
+
+/*****************************************************************************/
+/* returns error */
+static int APP_CC
+xrdp_orders_send_as_unicode(struct stream* s, const char* text)
+{
+  int str_chars;
+  int index;
+  int i32;
+  twchar wdst[256];
+
+  str_chars = g_mbstowcs(wdst, text, 255);
+  if (str_chars > 0)
+  {
+    i32 = str_chars * 2;
+    out_uint16_le(s, i32);
+    for (index = 0; index < str_chars; index++)
+    {
+      i32 = wdst[index];
+      out_uint16_le(s, i32);
+    }
+  }
+  else
+  {
+    out_uint16_le(s, 0);
+  }
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+/* flags can contain WINDOW_ORDER_STATE_NEW */
+int APP_CC
+xrdp_orders_send_window_new_update(struct xrdp_orders* self, int window_id,
+                                   struct rail_window_state_order* window_state,
+                                   int flags)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+  int num_chars;
+  int index;
+
+  order_size = 11;
+  field_present_flags = flags | WINDOW_ORDER_TYPE_WINDOW;
+  if (field_present_flags & WINDOW_ORDER_FIELD_OWNER)
+  {
+     /* ownerWindowId (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_STYLE)
+  {
+    /* style (4 bytes) */
+    order_size += 4;
+    /* extendedStyle (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_SHOW)
+  {
+     /* showState (1 byte) */
+    order_size += 1;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_TITLE)
+  {
+    /* titleInfo */
+    num_chars = g_mbstowcs(0, window_state->title_info, 0);
+    order_size += 2 * num_chars + 2;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_CLIENT_AREA_OFFSET)
+  {
+    /* clientOffsetX (4 bytes) */
+    order_size += 4;
+     /* clientOffsetY (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_CLIENT_AREA_SIZE)
+  {
+    /* clientAreaWidth (4 bytes) */
+    order_size += 4;
+    /* clientAreaHeight (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_RP_CONTENT)
+  {
+    /* RPContent (1 byte) */
+    order_size += 1;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_ROOT_PARENT)
+  {
+    /* rootParentHandle (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_OFFSET)
+  {
+    /* windowOffsetX (4 bytes) */
+    order_size += 4;
+    /* windowOffsetY (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_CLIENT_DELTA)
+  {
+    /* windowClientDeltaX (4 bytes) */
+    order_size += 4;
+    /* windowClientDeltaY (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_SIZE)
+  {
+    /* windowWidth (4 bytes) */
+    order_size += 4;
+    /* windowHeight (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_RECTS)
+  {
+    /* numWindowRects (2 bytes) */
+    order_size += 2;
+    order_size += 8 * window_state->num_window_rects;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_VIS_OFFSET)
+  {
+    /* visibleOffsetX (4 bytes) */
+    order_size += 4;
+    /* visibleOffsetY (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_VISIBILITY)
+  {
+    /* numVisibilityRects (2 bytes) */
+    order_size += 2;
+    order_size += 8 * window_state->num_visibility_rects;
+  }
+
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  out_uint32_le(self->out_s, field_present_flags);
+  /* windowId (4 bytes) */
+  out_uint32_le(self->out_s, window_id);
+
+  if (field_present_flags & WINDOW_ORDER_FIELD_OWNER)
+  {
+     /* ownerWindowId (4 bytes) */
+    out_uint32_le(self->out_s, window_state->owner_window_id);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_STYLE)
+  {
+    /* style (4 bytes) */
+    out_uint32_le(self->out_s, window_state->style);
+    /* extendedStyle (4 bytes) */
+    out_uint32_le(self->out_s, window_state->extended_style);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_SHOW)
+  {
+     /* showState (1 byte) */
+    out_uint8(self->out_s, window_state->show_state);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_TITLE)
+  {
+    /* titleInfo */
+    xrdp_orders_send_as_unicode(self->out_s, window_state->title_info);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_CLIENT_AREA_OFFSET)
+  {
+    /* clientOffsetX (4 bytes) */
+    out_uint32_le(self->out_s, window_state->client_offset_x);
+     /* clientOffsetY (4 bytes) */
+    out_uint32_le(self->out_s, window_state->client_offset_y);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_CLIENT_AREA_SIZE)
+  {
+    /* clientAreaWidth (4 bytes) */
+    out_uint32_le(self->out_s, window_state->client_area_width);
+    /* clientAreaHeight (4 bytes) */
+    out_uint32_le(self->out_s, window_state->client_area_height);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_RP_CONTENT)
+  {
+    /* RPContent (1 byte) */
+    out_uint8(self->out_s, window_state->rp_content);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_ROOT_PARENT)
+  {
+    /* rootParentHandle (4 bytes) */
+    out_uint32_le(self->out_s, window_state->root_parent_handle);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_OFFSET)
+  {
+    /* windowOffsetX (4 bytes) */
+    out_uint32_le(self->out_s, window_state->window_offset_x);
+    /* windowOffsetY (4 bytes) */
+    out_uint32_le(self->out_s, window_state->window_offset_y);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_CLIENT_DELTA)
+  {
+    /* windowClientDeltaX (4 bytes) */
+    out_uint32_le(self->out_s, window_state->window_client_delta_x);
+    /* windowClientDeltaY (4 bytes) */
+    out_uint32_le(self->out_s, window_state->window_client_delta_y);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_SIZE)
+  {
+    /* windowWidth (4 bytes) */
+    out_uint32_le(self->out_s, window_state->window_width);
+    /* windowHeight (4 bytes) */
+    out_uint32_le(self->out_s, window_state->window_height);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_WND_RECTS)
+  {
+    /* numWindowRects (2 bytes) */
+    out_uint16_le(self->out_s, window_state->num_window_rects);
+    for (index = 0; index < window_state->num_window_rects; index++)
+    {
+      out_uint16_le(self->out_s, window_state->window_rects[index].left);
+      out_uint16_le(self->out_s, window_state->window_rects[index].top);
+      out_uint16_le(self->out_s, window_state->window_rects[index].right);
+      out_uint16_le(self->out_s, window_state->window_rects[index].bottom);
+    }
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_VIS_OFFSET)
+  {
+    /* visibleOffsetX (4 bytes) */
+    out_uint32_le(self->out_s, window_state->visible_offset_x);
+    /* visibleOffsetY (4 bytes) */
+    out_uint32_le(self->out_s, window_state->visible_offset_y);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_VISIBILITY)
+  {
+    /* numVisibilityRects (2 bytes) */
+    out_uint16_le(self->out_s, window_state->num_visibility_rects);
+    for (index = 0; index < window_state->num_visibility_rects; index++)
+    {
+      out_uint16_le(self->out_s, window_state->visibility_rects[index].left);
+      out_uint16_le(self->out_s, window_state->visibility_rects[index].top);
+      out_uint16_le(self->out_s, window_state->visibility_rects[index].right);
+      out_uint16_le(self->out_s, window_state->visibility_rects[index].bottom);
+    }
+  }
+
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+int APP_CC
+xrdp_orders_send_notify_delete(struct xrdp_orders* self, int window_id,
+                               int notify_id)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+
+  order_size = 15;
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  field_present_flags = WINDOW_ORDER_TYPE_NOTIFY | WINDOW_ORDER_STATE_DELETED;
+  out_uint32_le(self->out_s, field_present_flags);
+  /* windowId (4 bytes) */
+  out_uint32_le(self->out_s, window_id);
+  /* notifyIconId (4 bytes) */
+  out_uint32_le(self->out_s, notify_id);
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+/* flags can contain WINDOW_ORDER_STATE_NEW */
+int APP_CC
+xrdp_orders_send_notify_new_update(struct xrdp_orders* self,
+                                   int window_id, int notify_id,
+                                   struct rail_notify_state_order* notify_state,
+                                   int flags)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+  int num_chars;
+  int use_cmap;
+
+  order_size = 15;
+  field_present_flags = flags | WINDOW_ORDER_TYPE_NOTIFY;
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_VERSION)
+  {
+    /* Version (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_TIP)
+  {
+    /* ToolTip (variable) UNICODE_STRING */
+    num_chars = g_mbstowcs(0, notify_state->tool_tip, 0);
+    order_size += 2 * num_chars + 2;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_INFO_TIP)
+  {
+    /* InfoTip (variable) TS_NOTIFY_ICON_INFOTIP */
+    /* UNICODE_STRING */
+    num_chars = g_mbstowcs(0, notify_state->infotip.title, 0);
+    order_size += 2 * num_chars + 2;
+    /* UNICODE_STRING */
+    num_chars = g_mbstowcs(0, notify_state->infotip.text, 0);
+    order_size += 2 * num_chars + 2;
+    /* Timeout (4 bytes) */
+    /* InfoFlags (4 bytes) */
+    order_size += 8;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_STATE)
+  {
+    /* State (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_ICON)
+  {
+    /* Icon (variable) */
+    use_cmap = 0;
+    if ((notify_state->icon_info.bpp == 1) || (notify_state->icon_info.bpp == 2) ||
+        (notify_state->icon_info.bpp == 4))
+    {
+      use_cmap = 1;
+    }
+    order_size += 12 + notify_state->icon_info.mask_bytes +
+                       notify_state->icon_info.data_bytes;
+    if (use_cmap)
+    {
+      order_size += notify_state->icon_info.cmap_bytes + 2;
+    }
+  }
+  if (field_present_flags & WINDOW_ORDER_CACHED_ICON)
+  {
+    /* CachedIcon (3 bytes) */
+    order_size += 3;
+  }
+
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  out_uint32_le(self->out_s, field_present_flags);
+  /* windowId (4 bytes) */
+  out_uint32_le(self->out_s, window_id);
+  /* notifyIconId (4 bytes) */
+  out_uint32_le(self->out_s, notify_id);
+
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_VERSION)
+  {
+    /* Version (4 bytes) */
+    out_uint32_le(self->out_s, notify_state->version);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_TIP)
+  {
+    /* ToolTip (variable) UNICODE_STRING */
+    xrdp_orders_send_as_unicode(self->out_s, notify_state->tool_tip);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_INFO_TIP)
+  {
+    /* InfoTip (variable) TS_NOTIFY_ICON_INFOTIP */
+    out_uint32_le(self->out_s, notify_state->infotip.timeout);
+    out_uint32_le(self->out_s, notify_state->infotip.flags);
+    xrdp_orders_send_as_unicode(self->out_s, notify_state->infotip.text);
+    xrdp_orders_send_as_unicode(self->out_s, notify_state->infotip.title);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_NOTIFY_STATE)
+  {
+    /* State (4 bytes) */
+    out_uint32_le(self->out_s, notify_state->state);
+  }
+  if (field_present_flags & WINDOW_ORDER_ICON)
+  {
+    /* Icon (variable) */
+    xrdp_orders_send_ts_icon(self->out_s, notify_state->icon_cache_entry,
+                             notify_state->icon_cache_id,
+                             &notify_state->icon_info);
+  }
+  if (field_present_flags & WINDOW_ORDER_CACHED_ICON)
+  {
+    /* CacheEntry (2 bytes) */
+    out_uint16_le(self->out_s, notify_state->icon_cache_entry);
+    /* CacheId (1 byte) */
+    out_uint8(self->out_s, notify_state->icon_cache_id);
+  }
+
+  return 0;
+}
+
+/*****************************************************************************/
+/* RAIL */
+/* returns error */
+/* used for both Non-Monitored Desktop and Actively Monitored Desktop */
+int APP_CC
+xrdp_orders_send_monitored_desktop(struct xrdp_orders* self,
+                                   struct rail_monitored_desktop_order* mdo,
+                                   int flags)
+{
+  int order_size;
+  int order_flags;
+  int field_present_flags;
+  int index;
+
+  order_size = 7;
+  field_present_flags = flags | WINDOW_ORDER_TYPE_DESKTOP;
+
+  if (field_present_flags & WINDOW_ORDER_FIELD_DESKTOP_ACTIVE_WND)
+  {
+    /* ActiveWindowId (4 bytes) */
+    order_size += 4;
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_DESKTOP_ZORDER)
+  {
+    /* NumWindowIds (1 byte) */
+    order_size += 1;
+    /* WindowIds (variable) */
+    order_size += mdo->num_window_ids *  4;
+  }
+
+  xrdp_orders_check(self, order_size);
+  self->order_count++;
+  order_flags = RDP_ORDER_SECONDARY;
+  order_flags |= 0xb << 2; /* type TS_ALTSEC_WINDOW */
+  out_uint8(self->out_s, order_flags);
+  /* orderSize (2 bytes) */
+  out_uint16_le(self->out_s, order_size);
+  /* FieldsPresentFlags (4 bytes) */
+  out_uint32_le(self->out_s, field_present_flags);
+
+  if (field_present_flags & WINDOW_ORDER_FIELD_DESKTOP_ACTIVE_WND)
+  {
+    /* ActiveWindowId (4 bytes) */
+    out_uint32_le(self->out_s, mdo->active_window_id);
+  }
+  if (field_present_flags & WINDOW_ORDER_FIELD_DESKTOP_ZORDER)
+  {
+    /* NumWindowIds (1 byte) */
+    out_uint8(self->out_s, mdo->num_window_ids);
+    /* WindowIds (variable) */
+    for (index = 0; index < mdo->num_window_ids; index++)
+    {
+      out_uint32_le(self->out_s, mdo->window_ids[index]);
+    }
+  }
+
+  return 0;
+}
diff --git a/libxrdp/xrdp_orders_rail.h b/libxrdp/xrdp_orders_rail.h
new file mode 100644
index 00000000..8f5b402f
--- /dev/null
+++ b/libxrdp/xrdp_orders_rail.h
@@ -0,0 +1,50 @@
+/**
+ * xrdp: A Remote Desktop Protocol server.
+ *
+ * Copyright (C) Jay Sorg 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.
+ */
+
+#if !defined(_XRDP_ORDERS_RAIL_H)
+#define _XRDP_ORDERS_RAIL_H
+
+int APP_CC
+xrdp_orders_send_window_delete(struct xrdp_orders* self, int window_id);
+int APP_CC
+xrdp_orders_send_window_cached_icon(struct xrdp_orders* self,
+                                    int window_id, int cache_entry,
+                                    int cache_id, int flags);
+int APP_CC
+xrdp_orders_send_window_icon(struct xrdp_orders* self,
+                             int window_id, int cache_entry, int cache_id,
+                             struct rail_icon_info* icon_info,
+                             int flags);
+int APP_CC
+xrdp_orders_send_window_new_update(struct xrdp_orders* self, int window_id,
+                                   struct rail_window_state_order* window_state,
+                                   int flags);
+int APP_CC
+xrdp_orders_send_notify_delete(struct xrdp_orders* self, int window_id,
+                               int notify_id);
+int APP_CC
+xrdp_orders_send_notify_new_update(struct xrdp_orders* self,
+                                   int window_id, int notify_id,
+                                   struct rail_notify_state_order* notify_state,
+                                   int flags);
+int APP_CC
+xrdp_orders_send_monitored_desktop(struct xrdp_orders* self,
+                                   struct rail_monitored_desktop_order* mdo,
+                                   int flags);
+
+#endif