297 lines
9.7 KiB
C
297 lines
9.7 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 1.16 2010/02/02 21:12:29 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* Code for tunnelling uIP packets over the Rime mesh routing module
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "net/hc.h"
|
|
#include "net/uip-fw.h"
|
|
#include "net/uip-over-mesh.h"
|
|
#include "net/rime/route-discovery.h"
|
|
#include "net/rime/route.h"
|
|
#include "net/rime/trickle.h"
|
|
|
|
#define ROUTE_TRICKLE_INTERVAL CLOCK_SECOND * 8
|
|
#define ROUTE_DISCOVERY_INTERVAL CLOCK_SECOND * 4
|
|
#define ROUTE_TIMEOUT CLOCK_SECOND * 4
|
|
|
|
static struct queuebuf *queued_packet;
|
|
static rimeaddr_t queued_receiver;
|
|
|
|
/* Connection for route discovery: */
|
|
static struct route_discovery_conn route_discovery;
|
|
|
|
/* Connection for sending data packets to the next hop node: */
|
|
static struct unicast_conn dataconn;
|
|
|
|
/* Connection for sending gateway announcement message to the entire
|
|
network: */
|
|
static struct trickle_conn gateway_announce_conn;
|
|
|
|
#define DEBUG 0
|
|
#if DEBUG
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...)
|
|
#endif
|
|
|
|
#define BUF ((struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
|
|
|
|
static struct uip_fw_netif *gw_netif;
|
|
static rimeaddr_t gateway;
|
|
static uip_ipaddr_t netaddr, netmask;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
recv_data(struct unicast_conn *c, const rimeaddr_t *from)
|
|
{
|
|
struct route_entry *e;
|
|
rimeaddr_t source;
|
|
|
|
uip_len = packetbuf_copyto(&uip_buf[UIP_LLH_LEN]);
|
|
|
|
source.u8[0] = BUF->srcipaddr.u8[2];
|
|
source.u8[1] = BUF->srcipaddr.u8[3];
|
|
|
|
e = route_lookup(from);
|
|
if(e == NULL) {
|
|
route_add(&source, from, 10, 0);
|
|
} else {
|
|
route_refresh(e);
|
|
}
|
|
|
|
/* uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);*/
|
|
|
|
PRINTF("uip-over-mesh: %d.%d: recv_data with len %d\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1], uip_len);
|
|
tcpip_input();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
send_data(rimeaddr_t *next)
|
|
{
|
|
PRINTF("uip-over-mesh: %d.%d: send_data with len %d\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
|
packetbuf_totlen());
|
|
unicast_send(&dataconn, next);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
new_route(struct route_discovery_conn *c, const rimeaddr_t *to)
|
|
{
|
|
struct route_entry *rt;
|
|
|
|
if(queued_packet) {
|
|
PRINTF("uip-over-mesh: new route, sending queued packet\n");
|
|
|
|
queuebuf_to_packetbuf(queued_packet);
|
|
queuebuf_free(queued_packet);
|
|
queued_packet = NULL;
|
|
|
|
rt = route_lookup(&queued_receiver);
|
|
if(rt) {
|
|
route_decay(rt);
|
|
send_data(&queued_receiver);
|
|
}
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
timedout(struct route_discovery_conn *c)
|
|
{
|
|
PRINTF("uip-over-mesh: packet timed out\n");
|
|
if(queued_packet) {
|
|
PRINTF("uip-over-mesh: freeing queued packet\n");
|
|
queuebuf_free(queued_packet);
|
|
queued_packet = NULL;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static const struct unicast_callbacks data_callbacks = { recv_data };
|
|
static const struct route_discovery_callbacks rdc = { new_route, timedout };
|
|
/*---------------------------------------------------------------------------*/
|
|
struct gateway_msg {
|
|
rimeaddr_t gateway;
|
|
};
|
|
|
|
static uint8_t is_gateway;
|
|
|
|
static void
|
|
gateway_announce_recv(struct trickle_conn *c)
|
|
{
|
|
struct gateway_msg *msg;
|
|
msg = packetbuf_dataptr();
|
|
PRINTF("%d.%d: gateway message: %d.%d\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
|
|
msg->gateway.u8[0], msg->gateway.u8[1]);
|
|
|
|
if(!is_gateway) {
|
|
uip_over_mesh_set_gateway(&msg->gateway);
|
|
}
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_over_mesh_make_announced_gateway(void)
|
|
{
|
|
struct gateway_msg msg;
|
|
/* Make this node the gateway node, unless it already is the
|
|
gateway. */
|
|
if(!is_gateway) {
|
|
PRINTF("%d.%d: making myself the gateway\n",
|
|
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
|
|
uip_over_mesh_set_gateway(&rimeaddr_node_addr);
|
|
rimeaddr_copy(&(msg.gateway), &rimeaddr_node_addr);
|
|
packetbuf_copyfrom(&msg, sizeof(struct gateway_msg));
|
|
trickle_send(&gateway_announce_conn);
|
|
is_gateway = 1;
|
|
}
|
|
}
|
|
const static struct trickle_callbacks trickle_call = {gateway_announce_recv};
|
|
/*---------------------------------------------------------------------------*/
|
|
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]);
|
|
|
|
unicast_open(&dataconn, channels, &data_callbacks);
|
|
route_discovery_open(&route_discovery, ROUTE_DISCOVERY_INTERVAL,
|
|
channels + 1, &rdc);
|
|
trickle_open(&gateway_announce_conn, ROUTE_TRICKLE_INTERVAL, channels + 3,
|
|
&trickle_call);
|
|
|
|
route_init();
|
|
/* Set lifetime to 30 seconds for non-refreshed routes. */
|
|
route_set_lifetime(30);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
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. */
|
|
|
|
/* Packets destined to this network is sent using mesh, whereas
|
|
packets destined to a network outside this network is sent towards
|
|
the gateway node. */
|
|
|
|
if(uip_ipaddr_maskcmp(&BUF->destipaddr, &netaddr, &netmask)) {
|
|
receiver.u8[0] = BUF->destipaddr.u8[2];
|
|
receiver.u8[1] = BUF->destipaddr.u8[3];
|
|
} else {
|
|
if(rimeaddr_cmp(&gateway, &rimeaddr_node_addr)) {
|
|
PRINTF("uip_over_mesh_send: I am gateway, packet to %d.%d.%d.%d to local interface\n",
|
|
uip_ipaddr_to_quad(&BUF->destipaddr));
|
|
if(gw_netif != NULL) {
|
|
return gw_netif->output();
|
|
}
|
|
return UIP_FW_DROPPED;
|
|
} else if(rimeaddr_cmp(&gateway, &rimeaddr_null)) {
|
|
PRINTF("uip_over_mesh_send: No gateway setup, dropping packet\n");
|
|
return UIP_FW_OK;
|
|
} else {
|
|
PRINTF("uip_over_mesh_send: forwarding packet to %d.%d.%d.%d towards gateway %d.%d\n",
|
|
uip_ipaddr_to_quad(&BUF->destipaddr),
|
|
gateway.u8[0], gateway.u8[1]);
|
|
rimeaddr_copy(&receiver, &gateway);
|
|
}
|
|
}
|
|
|
|
PRINTF("uIP over mesh send to %d.%d with len %d\n",
|
|
receiver.u8[0], receiver.u8[1],
|
|
uip_len);
|
|
|
|
/* uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);*/
|
|
|
|
packetbuf_copyfrom(&uip_buf[UIP_LLH_LEN], uip_len);
|
|
|
|
/* Send TCP data with the PACKETBUF_ATTR_ERELIABLE set so that
|
|
an underlying power-saving MAC layer knows that it should be
|
|
waiting for an ACK. */
|
|
if(BUF->proto == UIP_PROTO_TCP) {
|
|
packetbuf_set_attr(PACKETBUF_ATTR_ERELIABLE, 1);
|
|
packetbuf_set_attr(PACKETBUF_ATTR_PACKET_TYPE, PACKETBUF_ATTR_PACKET_TYPE_STREAM);
|
|
}
|
|
|
|
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_packetbuf();
|
|
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 {
|
|
route_decay(rt);
|
|
send_data(&rt->nexthop);
|
|
}
|
|
return UIP_FW_OK;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_over_mesh_set_gateway_netif(struct uip_fw_netif *n)
|
|
{
|
|
gw_netif = n;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_over_mesh_set_gateway(rimeaddr_t *gw)
|
|
{
|
|
rimeaddr_copy(&gateway, gw);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
uip_over_mesh_set_net(uip_ipaddr_t *addr, uip_ipaddr_t *mask)
|
|
{
|
|
uip_ipaddr_copy(&netaddr, addr);
|
|
uip_ipaddr_copy(&netmask, mask);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|