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uip-driver.c

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00001 /*
00002  * Copyright (c) 2010, Swedish Institute of Computer Science.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * $Id: uip-driver.c,v 1.2 2010/06/14 19:19:17 adamdunkels Exp $
00030  */
00031 
00032 /**
00033  * \file
00034  *         A brief description of what this file is
00035  * \author
00036  *         Niclas Finne <nfi@sics.se>
00037  *         Joakim Eriksson <joakime@sics.se>
00038  */
00039 
00040 #include "net/netstack.h"
00041 #include "net/uip.h"
00042 #include "net/tcpip.h"
00043 #include "net/hc.h"
00044 #include "net/packetbuf.h"
00045 #include "net/uip-driver.h"
00046 #include <string.h>
00047 
00048 /*--------------------------------------------------------------------*/
00049 uint8_t
00050 uip_driver_send(void)
00051 {
00052   packetbuf_copyfrom(&uip_buf[UIP_LLH_LEN], uip_len);
00053 
00054   /* XXX we should provide a callback function that is called when the
00055      packet is sent. For now, we just supply a NULL pointer. */
00056   NETSTACK_MAC.send(NULL, NULL);
00057   return 1;
00058 }
00059 /*--------------------------------------------------------------------*/
00060 static void
00061 init(void)
00062 {
00063   /*
00064    * Set out output function as the function to be called from uIP to
00065    * send a packet.
00066    */
00067   tcpip_set_outputfunc(uip_driver_send);
00068 }
00069 /*--------------------------------------------------------------------*/
00070 static void
00071 input(void)
00072 {
00073   if(packetbuf_datalen() > 0 &&
00074      packetbuf_datalen() <= UIP_BUFSIZE - UIP_LLH_LEN) {
00075     memcpy(&uip_buf[UIP_LLH_LEN], packetbuf_dataptr(), packetbuf_datalen());
00076     uip_len = packetbuf_datalen();
00077     tcpip_input();
00078   }
00079 }
00080 /*--------------------------------------------------------------------*/
00081 const struct network_driver uip_driver = {
00082   "uip",
00083   init,
00084   input
00085 };
00086 /*--------------------------------------------------------------------*/