Fix behavior of adding a cell to a blocked queue.

We frequently add cells to stream-blocked queues for valid reasons
that don't mean we need to block streams.  The most obvious reason
is if the cell arrives over a circuit rather than from an edge: we
don't block circuits, no matter how full queues get.  The next most
obvious reason is that we allow CONNECTED cells from a newly created
stream to get delivered just fine.

This patch changes the behavior so that we only iterate over the
streams on a circuit when the cell in question came from a stream,
and we only block the stream that generated the cell, so that other
streams can still get their CONNECTEDs in.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/or/relay.h b/src/or/relay.h
index 73855a52bf..088ef3228a 100644
--- a/src/or/relay.h
+++ b/src/or/relay.h
@@ -45,7 +45,8 @@ void cell_queue_append(cell_queue_t *queue, packed_cell_t *cell);
 void cell_queue_append_packed_copy(cell_queue_t *queue, const cell_t *cell);
 
 void append_cell_to_circuit_queue(circuit_t *circ, or_connection_t *orconn,
-                                  cell_t *cell, cell_direction_t direction);
+                                  cell_t *cell, cell_direction_t direction,
+                                  uint16_t fromstream);
 void connection_or_unlink_all_active_circs(or_connection_t *conn);
 int connection_or_flush_from_first_active_circuit(or_connection_t *conn,
                                                   int max, time_t now);