note potential DOS in the code I just added

1 files changed, 16 insertions, 0 deletions

diff --git a/TODO b/TODO
index bf98cc8..7fd1f13 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,19 @@
 * for some reason reset is needed after debug-me exits, despite it trying
   to clean up the terminal settings
 * set pty size, and forward resizes to the pty (setting new size and SIGWINCH)
+* potential DOS where developer sends Activity Entered that all
+  refer back to the first Activity Seen. This requires the user
+  side to keep a Backlog containing all later Activity Seen, so uses
+  up a lot of memory.
+
+  For this to work, the developer would need to include
+  in their Activity Entered echoData anticipating all the Activity Seen
+  that they have generated. This is doable; for example the developer
+  can send a stream of A's, and then needs to only include the right
+  amount in the echoData.
+
+  Should probably cap the BackLog to some maximum size to prevent
+  this kind of DOS. Dropping old items from the BackLog after some
+  amount of time would also work; after eg 10 seconds it's very
+  unlikely that a Activity Entered will legitimately refer to an
+  old backlog item.