radiopackettinysecm.nc

nesC写的heed算法

// $Id: RadioPacketTinySecM.nc,v 1.2.2.2 2003/08/18 22:09:49 cssharp Exp $

/*									tab:4
 * "Copyright (c) 2000-2003 The Regents of the University  of California.  
 * All rights reserved.
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 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */
module RadioPacketTinySecM
{
  provides {
    interface BareSendMsg as Send;
     interface ReceiveMsg as Receive;
  }
  uses {
    interface BareSendMsg as RadioSend;
    interface ReceiveMsg as RadioReceive;
    interface Leds;
  }
}
implementation
{
  
  command result_t Send.send(TOS_MsgPtr msg) {
    if(msg->sendSecurityMode == TINYSEC_AUTH_ONLY)
      msg->length = msg->length | TINYSEC_ENABLED_BIT;
    else if(msg->sendSecurityMode == TINYSEC_ENCRYPT_AND_AUTH)
      msg->length = msg->length | TINYSEC_ENABLED_BIT |
	TINYSEC_ENCRYPT_ENABLED_BIT;
    else if(msg->sendSecurityMode != TINYSEC_DISABLED)
      return FAIL;
   
    return call RadioSend.send(msg);
  }

  event result_t RadioSend.sendDone(TOS_MsgPtr msg, result_t success) {
    msg->length = msg->length & ~(TINYSEC_ENABLED_BIT |
				  TINYSEC_ENCRYPT_ENABLED_BIT);
    return signal Send.sendDone(msg,success);
  }
    
  event TOS_MsgPtr RadioReceive.receive(TOS_MsgPtr msg) {
    if(msg->length & TINYSEC_ENABLED_BIT) {
      if(msg->length & TINYSEC_ENCRYPT_ENABLED_BIT) {
	msg->receiveSecurityMode = (uint8_t) TINYSEC_ENCRYPT_AND_AUTH;
      } else {
	msg->receiveSecurityMode = (uint8_t) TINYSEC_AUTH_ONLY;
      }
    } else {
      msg->receiveSecurityMode = (uint8_t) TINYSEC_DISABLED;
    }
    msg->length = msg->length & ~(TINYSEC_ENABLED_BIT | TINYSEC_ENCRYPT_ENABLED_BIT);
    return signal Receive.receive(msg);
  }

}