From 0d8654481964bf13a4af5474ec37d44ef10320df Mon Sep 17 00:00:00 2001
From: speidy <speidy@gmail.com>
Date: Sat, 5 Oct 2013 12:03:15 +0300
Subject: [PATCH] libxrdp: work on multimon, added monitor data processing

---
 libxrdp/libxrdp.h  | 10 ++++++----
 libxrdp/xrdp_mcs.c | 15 +++++++++++++++
 libxrdp/xrdp_sec.c | 36 +++++++++++++++++++-----------------
 3 files changed, 40 insertions(+), 21 deletions(-)

diff --git a/libxrdp/libxrdp.h b/libxrdp/libxrdp.h
index 66b0cb61..88afae75 100644
--- a/libxrdp/libxrdp.h
+++ b/libxrdp/libxrdp.h
@@ -49,6 +49,8 @@ struct xrdp_iso
 {
   struct xrdp_mcs* mcs_layer; /* owner */
   struct xrdp_tcp* tcp_layer;
+  int requestedProtocol;
+  int selectedProtocol;
 };
 
 /* used in mcs */
@@ -62,10 +64,10 @@ struct mcs_channel_item
 /* used in mcs - client monitor data */
 struct mcs_monitor_item
 {
-	int x;
-	int y;
-	int width;
-	int height;
+	int left;
+	int top;
+	int right;
+	int bottom;
 	int is_primary;
 };
 
diff --git a/libxrdp/xrdp_mcs.c b/libxrdp/xrdp_mcs.c
index 7d89766d..e7c5dee3 100644
--- a/libxrdp/xrdp_mcs.c
+++ b/libxrdp/xrdp_mcs.c
@@ -38,6 +38,7 @@ xrdp_mcs_create(struct xrdp_sec *owner, struct trans *trans,
     self->server_mcs_data = server_mcs_data;
     self->iso_layer = xrdp_iso_create(self, trans);
     self->channel_list = list_create();
+    self->monitor_list = list_create();
     DEBUG(("  out xrdp_mcs_create"));
     return self;
 }
@@ -47,6 +48,7 @@ void APP_CC
 xrdp_mcs_delete(struct xrdp_mcs *self)
 {
     struct mcs_channel_item *channel_item;
+    struct mcs_monitor_item *monitor_item;
     int index;
     int count;
 
@@ -66,6 +68,19 @@ xrdp_mcs_delete(struct xrdp_mcs *self)
     }
 
     list_delete(self->channel_list);
+
+    /* here we have to free the monitor items and anything in them */
+    count = self->monitor_list->count;
+
+    for (index = count - 1; index >= 0; index--)
+    {
+        monitor_item = (struct mcs_monitor_item *)
+                       list_get_item(self->monitor_list, index);
+        g_free(monitor_item);
+    }
+
+    list_delete(self->monitor_list);
+
     xrdp_iso_delete(self->iso_layer);
     /* make sure we get null pointer exception if struct is used again. */
     DEBUG(("xrdp_mcs_delete processed"))
diff --git a/libxrdp/xrdp_sec.c b/libxrdp/xrdp_sec.c
index d7847eb7..cacd7b8e 100644
--- a/libxrdp/xrdp_sec.c
+++ b/libxrdp/xrdp_sec.c
@@ -852,7 +852,7 @@ xrdp_sec_process_mcs_data_channels(struct xrdp_sec *self, struct stream *s)
     return 0;
 }
 /*****************************************************************************/
-/* reads the client monitors data, in order to send it to X11rdp */
+/* reads the client monitors data */
 static int APP_CC
 xrdp_sec_process_mcs_data_monitors(struct xrdp_sec *self, struct stream *s)
 {
@@ -862,33 +862,36 @@ xrdp_sec_process_mcs_data_monitors(struct xrdp_sec *self, struct stream *s)
 	struct mcs_monitor_item *monitor_item;
 
     DEBUG(("processing monitors data, allow_multimon is %d", self->multimon));
-
     /* this is an option set in xrdp.ini */
-    if (self->multimon != 1) /* is multi-monitors allowed ? */
+    if (self->multimon != 1) /* are multi-monitors allowed ? */
     {
-        g_writeln("Processing monitor data from client - Multimon is not allowed");
+    	DEBUG(("[INFO] xrdp_sec_process_mcs_data_monitors: multimon is not allowed, skipping"));
         return 0;
     }
-
     in_uint32_le(s, flags); /* flags */
-    DEBUG(("xrdp_sec_process_mcs_data_monitors: monitor flags is %s", flags));
-
+    //verify flags - must be 0x0
+    if (flags != 0){
+    	DEBUG(("[ERROR] xrdp_sec_process_mcs_data_monitors: flags MUST be zero, detected: %d", flags));
+    	return 0;
+    }
     in_uint32_le(s, monitorCount);
-    DEBUG(("xrdp_sec_process_mcs_data_monitors: monitor count is %s", monitorCount));
-
+    //verify monitorCount - max 16
+    if (monitorCount > 16){
+    	DEBUG(("[ERROR] xrdp_sec_process_mcs_data_monitors: max allowed monitors is 16, detected: %d", monitorCount));
+    	return 0;
+    }
     for (index = 0; index < monitorCount; index++)
     {
     	monitor_item = (struct mcs_monitor_item *)
                        g_malloc(sizeof(struct mcs_monitor_item), 1);
-    	in_uint32_le(s, monitor_item->x); //TODO: change to signed 32 bit int.
-        in_uint32_le(s, monitor_item->y); //TODO: change to signed 32 bit int.
-        in_uint32_le(s, monitor_item->width); //TODO: change to signed 32 bit int.
-        in_uint32_le(s, monitor_item->height); //TODO: change to signed 32 bit int.
+    	in_uint32_le(s, monitor_item->left);
+        in_uint32_le(s, monitor_item->top);
+        in_uint32_le(s, monitor_item->right);
+        in_uint32_le(s, monitor_item->bottom);
         in_uint32_le(s, monitor_item->is_primary);
-
         list_add_item(self->mcs_layer->monitor_list, (long)monitor_item);
-        DEBUG(("got monitor: flags %8.8x is primary? %s", monitor_item->height,
-        		monitor_item->is_primary));
+        DEBUG(("got monitor: x: %d, y: %d, width: %d, height: %d, is primary: %d",
+        		monitor_item->x, monitor_item->y, monitor_item->width, monitor_item->height, monitor_item->is_primary));
     }
 
     return 0;
@@ -935,7 +938,6 @@ xrdp_sec_process_mcs_data(struct xrdp_sec *self)
             case SEC_TAG_CLI_4:
                 break;
             case SEC_TAG_CLI_MONITOR:
-            	DEBUG((" 			in CS_MONITOR !!!"));
             	xrdp_sec_process_mcs_data_monitors(self, s);
                 break;
             default: