Contiki 2.6

unicast.c

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00001 
00002 /**
00003  * \addtogroup rimeuc
00004  * @{
00005  */
00006 
00007 /*
00008  * Copyright (c) 2006, Swedish Institute of Computer Science.
00009  * All rights reserved.
00010  *
00011  * Redistribution and use in source and binary forms, with or without
00012  * modification, are permitted provided that the following conditions
00013  * are met:
00014  * 1. Redistributions of source code must retain the above copyright
00015  *    notice, this list of conditions and the following disclaimer.
00016  * 2. Redistributions in binary form must reproduce the above copyright
00017  *    notice, this list of conditions and the following disclaimer in the
00018  *    documentation and/or other materials provided with the distribution.
00019  * 3. Neither the name of the Institute nor the names of its contributors
00020  *    may be used to endorse or promote products derived from this software
00021  *    without specific prior written permission.
00022  *
00023  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00024  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00026  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00027  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00028  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00029  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00030  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00031  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00032  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00033  * SUCH DAMAGE.
00034  *
00035  * This file is part of the Contiki operating system.
00036  *
00037  * $Id: unicast.c,v 1.4 2010/02/23 18:38:05 adamdunkels Exp $
00038  */
00039 
00040 /**
00041  * \file
00042  *         Single-hop unicast
00043  * \author
00044  *         Adam Dunkels <adam@sics.se>
00045  */
00046 
00047 #include "net/rime.h"
00048 #include "net/rime/unicast.h"
00049 #include <string.h>
00050 
00051 static const struct packetbuf_attrlist attributes[] =
00052   {
00053     UNICAST_ATTRIBUTES
00054     PACKETBUF_ATTR_LAST
00055   };
00056 
00057 #define DEBUG 0
00058 #if DEBUG
00059 #include <stdio.h>
00060 #define PRINTF(...) printf(__VA_ARGS__)
00061 #else
00062 #define PRINTF(...)
00063 #endif
00064 
00065 /*---------------------------------------------------------------------------*/
00066 static void
00067 recv_from_broadcast(struct broadcast_conn *broadcast, const rimeaddr_t *from)
00068 {
00069   struct unicast_conn *c = (struct unicast_conn *)broadcast;
00070 
00071   PRINTF("%d.%d: uc: recv_from_broadcast, receiver %d.%d\n",
00072          rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
00073          packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[0],
00074          packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[1]);
00075   if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_node_addr)) {
00076     c->u->recv(c, from);
00077   }
00078 }
00079 /*---------------------------------------------------------------------------*/
00080 static void
00081 sent_by_broadcast(struct broadcast_conn *broadcast, int status, int num_tx)
00082 {
00083   struct unicast_conn *c = (struct unicast_conn *)broadcast;
00084 
00085   PRINTF("%d.%d: uc: sent_by_broadcast, receiver %d.%d\n",
00086          rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
00087          packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[0],
00088          packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[1]);
00089 
00090   if(c->u->sent) {
00091     c->u->sent(c, status, num_tx);
00092   }
00093 }
00094 /*---------------------------------------------------------------------------*/
00095 static const struct broadcast_callbacks uc = {recv_from_broadcast,
00096                                               sent_by_broadcast};
00097 /*---------------------------------------------------------------------------*/
00098 void
00099 unicast_open(struct unicast_conn *c, uint16_t channel,
00100              const struct unicast_callbacks *u)
00101 {
00102   broadcast_open(&c->c, channel, &uc);
00103   c->u = u;
00104   channel_set_attributes(channel, attributes);
00105 }
00106 /*---------------------------------------------------------------------------*/
00107 void
00108 unicast_close(struct unicast_conn *c)
00109 {
00110   broadcast_close(&c->c);
00111 }
00112 /*---------------------------------------------------------------------------*/
00113 int
00114 unicast_send(struct unicast_conn *c, const rimeaddr_t *receiver)
00115 {
00116   PRINTF("%d.%d: unicast_send to %d.%d\n",
00117          rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1],
00118          receiver->u8[0], receiver->u8[1]);
00119   packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, receiver);
00120   return broadcast_send(&c->c);
00121 }
00122 /*---------------------------------------------------------------------------*/
00123 /** @} */