From 1640b11972b66f0f5cf40d79254459c32e58d2b9 Mon Sep 17 00:00:00 2001
From: adamdunkels <adamdunkels>
Date: Tue, 8 Jan 2008 07:54:16 +0000
Subject: [PATCH] The radio driver now takes care of adjusting for the
 transmission time

---
 core/sys/timesynch.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/core/sys/timesynch.c b/core/sys/timesynch.c
index ecf8c33db..adb808bd7 100644
--- a/core/sys/timesynch.c
+++ b/core/sys/timesynch.c
@@ -34,7 +34,7 @@
  *
  * This file is part of the Contiki operating system.
  *
- * $Id: timesynch.c,v 1.4 2007/12/23 14:57:11 oliverschmidt Exp $
+ * $Id: timesynch.c,v 1.5 2008/01/08 07:54:16 adamdunkels Exp $
  */
 
 /**
@@ -107,25 +107,36 @@ read_packet(void)
 
   len = mac->read();
 
+  if(len == 0) {
+    return 0;
+  }
+  
   /* We check the authority level of the sender of the incoming
      packet. If the sending node has a lower authority level than we
      have, we synchronize to the time of the sending node and set our
      own authority level to be one more than the sending node. */
   if(simple_cc2420_authority_level_of_sender < authority_level) {
-    adjust_offset(simple_cc2420_time_of_departure +
-		  simple_cc2420_time_for_transmission,
+    
+    adjust_offset(simple_cc2420_time_of_departure,
 		  simple_cc2420_time_of_arrival);
     if(simple_cc2420_authority_level_of_sender + 1 != authority_level) {
       authority_level = simple_cc2420_authority_level_of_sender + 1;
     }
 
-    /* XXX the authority level should be increased over time except
-       for the sink node. */
   }
   
   return len;
 }
 /*---------------------------------------------------------------------------*/
+#if 0
+static void
+periodic_authority_increase(void *ptr)
+{
+  /* XXX the authority level should be increased over time except
+     for the sink node (which has authority 0). */
+}
+#endif
+/*---------------------------------------------------------------------------*/
 static void
 set_receive_function(void (* recv)(const struct mac_driver *))
 {