X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=tos%2Fchips%2Fcc2420%2FCC2420ActiveMessageP.nc;h=0db2423c7b83167d7bf41b4797e85c117b52cb8f;hb=aa7578fd1472c62c1d22d0801fe0f55b36093bdf;hp=002aa3367433db2768fd582c8298bec6a2f3214c;hpb=75fb0d26dede581e8df3c6f06a6d1b3ccc55a8f7;p=tinyos-2.x.git

diff --git a/tos/chips/cc2420/CC2420ActiveMessageP.nc b/tos/chips/cc2420/CC2420ActiveMessageP.nc
index 002aa336..0db2423c 100644
--- a/tos/chips/cc2420/CC2420ActiveMessageP.nc
+++ b/tos/chips/cc2420/CC2420ActiveMessageP.nc
@@ -1,4 +1,4 @@
-/*									tab:4
+/*
  * "Copyright (c) 2005 Stanford University. All rights reserved.
  *
  * Permission to use, copy, modify, and distribute this software and
@@ -34,7 +34,7 @@
  
 #include "CC2420.h"
 
-module CC2420ActiveMessageP {
+module CC2420ActiveMessageP @safe() {
   provides {
     interface AMSend[am_id_t id];
     interface Receive[am_id_t id];
@@ -57,15 +57,16 @@ module CC2420ActiveMessageP {
 }
 implementation {
 
-  enum {
-    CC2420_SIZE = MAC_HEADER_SIZE + MAC_FOOTER_SIZE,
-  };
-  
   /***************** AMSend Commands ****************/
   command error_t AMSend.send[am_id_t id](am_addr_t addr,
 					  message_t* msg,
 					  uint8_t len) {
     cc2420_header_t* header = call CC2420PacketBody.getHeader( msg );
+    
+    if (len > call Packet.maxPayloadLength()) {
+      return ESIZE;
+    }
+    
     header->type = id;
     header->dest = addr;
     header->destpan = call CC2420Config.getPanAddr();
@@ -73,7 +74,7 @@ implementation {
     
     signal SendNotifier.aboutToSend[id](addr, msg);
     
-    return call SubSend.send( msg, len + CC2420_SIZE );
+    return call SubSend.send( msg, len );
   }
 
   command error_t AMSend.cancel[am_id_t id](message_t* msg) {
@@ -179,10 +180,10 @@ implementation {
     }
     
     if (call AMPacket.isForMe(msg)) {
-      return signal Receive.receive[call AMPacket.type(msg)](msg, payload, len - CC2420_SIZE);
+      return signal Receive.receive[call AMPacket.type(msg)](msg, payload, len);
     }
     else {
-      return signal Snoop.receive[call AMPacket.type(msg)](msg, payload, len - CC2420_SIZE);
+      return signal Snoop.receive[call AMPacket.type(msg)](msg, payload, len);
     }
   }