153 lines
5.3 KiB
C
153 lines
5.3 KiB
C
/*
|
|
* Copyright (c) 2007, Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* $Id: uip-over-mesh.c,v 1.2 2007/03/25 12:13:22 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Code for tunnelling uIP packets over the mesh routing module
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include "net/hc.h"
|
|
#include "net/uip-fw.h"
|
|
#include "net/rime/route-discovery.h"
|
|
#include "net/rime/route.h"
|
|
|
|
#define ROUTE_TIMEOUT CLOCK_SECOND * 4
|
|
|
|
static struct queuebuf *queued_packet;
|
|
static rimeaddr_t queued_receiver;
|
|
static struct route_discovery_conn route_discovery;;
|
|
static struct uc_conn dataconn;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
recv_data(struct uc_conn *c, rimeaddr_t *from)
|
|
{
|
|
uip_len = rimebuf_copyto(&uip_buf[UIP_LLH_LEN]);
|
|
|
|
/* uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);*/
|
|
|
|
/* printf("%d.%d:recv_data\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);*/
|
|
tcpip_input();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
send_data(rimeaddr_t *next)
|
|
{
|
|
/* printf("%d.%d:send_data\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);*/
|
|
uc_send(&dataconn, next);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
new_route(struct route_discovery_conn *c, rimeaddr_t *to)
|
|
{
|
|
struct route_entry *rt;
|
|
|
|
if(queued_packet) {
|
|
queuebuf_to_rimebuf(queued_packet);
|
|
queuebuf_free(queued_packet);
|
|
queued_packet = NULL;
|
|
|
|
rt = route_lookup(&queued_receiver);
|
|
if(rt) {
|
|
send_data(&queued_receiver);
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
timedout(struct route_discovery_conn *c)
|
|
{
|
|
if(queued_packet) {
|
|
queuebuf_free(queued_packet);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static const struct uc_callbacks data_callbacks = { recv_data };
|
|
static const struct route_discovery_callbacks rdc = { new_route, timedout };
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_over_mesh_init(u16_t channels)
|
|
{
|
|
|
|
/* printf("Our address is %d.%d (%d.%d.%d.%d)\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
|
uip_hostaddr.u8[0], uip_hostaddr.u8[1],
|
|
uip_hostaddr.u8[2], uip_hostaddr.u8[3]); */
|
|
|
|
uc_open(&dataconn, channels, &data_callbacks);
|
|
route_discovery_open(&route_discovery, CLOCK_SECOND / 2,
|
|
channels + 1, &rdc);
|
|
tcpip_set_forwarding(1);
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
u8_t
|
|
uip_over_mesh_send(void)
|
|
{
|
|
rimeaddr_t receiver;
|
|
struct route_entry *rt;
|
|
|
|
/* This function is called by the uip-fw module to send out an IP
|
|
packet. We try to send the IP packet to the next hop route, or we
|
|
queue the packet and send out a route request for the final
|
|
receiver of the packet. */
|
|
|
|
receiver.u16[0] = ((struct uip_udpip_hdr *)&uip_buf[UIP_LLH_LEN])->destipaddr.u16[1];
|
|
|
|
printf("uIP over mesh send to %d.%d\n", receiver.u8[0], receiver.u8[1]);
|
|
|
|
/* uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);*/
|
|
|
|
rimebuf_copyfrom(&uip_buf[UIP_LLH_LEN], uip_len);
|
|
|
|
rt = route_lookup(&receiver);
|
|
if(rt == NULL) {
|
|
printf("uIP over mesh no route to %d.%d\n", receiver.u8[0], receiver.u8[1]);
|
|
if(queued_packet == NULL) {
|
|
queued_packet = queuebuf_new_from_rimebuf();
|
|
rimeaddr_copy(&queued_receiver, &receiver);
|
|
route_discovery_discover(&route_discovery, &receiver, ROUTE_TIMEOUT);
|
|
} else if(!rimeaddr_cmp(&queued_receiver, &receiver)) {
|
|
route_discovery_discover(&route_discovery, &receiver, ROUTE_TIMEOUT);
|
|
}
|
|
} else {
|
|
send_data(&rt->nexthop);
|
|
}
|
|
return UIP_FW_OK;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|