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Refactored the mesh code by splitting multi-hop forwarding and route discovery. The mesh module is now much simpler than before

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This commit is contained in:
adamdunkels 2007-03-22 17:34:16 +00:00
parent c914d268ca
commit 2ef8c91bbc
4 changed files with 393 additions and 240 deletions
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288
core/net/rime/mesh.c
View File

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: mesh.c,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
* $Id: mesh.c,v 1.5 2007/03/22 17:34:16 adamdunkels Exp $
*/
/**
@ -41,12 +41,9 @@
#include "contiki.h"
#include "net/rime.h"
#include "net/rime/route.h"
#include "net/rime/mesh.h"
struct route_msg {
rimeaddr_t dest;
u8_t rreq_id;
u8_t pad;
};
#include <stddef.h> /* For offsetof */
struct data_hdr {
rimeaddr_t dest;
@ -54,28 +51,7 @@ struct data_hdr {
u16_t seqno;
};
struct rrep_hdr {
u8_t rreq_id;
u8_t hops;
rimeaddr_t dest;
rimeaddr_t originator;
};
struct mesh_conn {
struct uc_conn dataconn;
struct uc_conn rrepconn;
struct nf_conn rreqconn;
rimeaddr_t last_rreq_originator;
u16_t last_rreq_id;
u16_t rreq_id;
struct queuebuf *queued_data;
rimeaddr_t queued_data_dest;
const struct mesh_callbacks *cb;
};
static struct mesh_conn mc;
static void (* send_datapacket_handler)(rimeaddr_t *next) = NULL;
#define PACKET_TIMEOUT (CLOCK_SECOND * 4)
#define DEBUG 0
#if DEBUG
@ -87,238 +63,86 @@ static void (* send_datapacket_handler)(rimeaddr_t *next) = NULL;
/*---------------------------------------------------------------------------*/
static void
send_rreq(rimeaddr_t *dest)
data_packet_received(struct mh_conn *mh, rimeaddr_t *from)
{
struct route_msg *msg;
struct mesh_conn *c = (struct mesh_conn *)
((char *)mh - offsetof(struct mesh_conn, mh));
rimebuf_clear();
msg = rimebuf_dataptr();
rimebuf_set_datalen(sizeof(struct route_msg));
msg->pad = 0;
msg->rreq_id = mc.rreq_id;
rimeaddr_copy(&msg->dest, dest);
nf_send(&mc.rreqconn);
}
/*---------------------------------------------------------------------------*/
static void
send_data(rimeaddr_t *to, struct route_entry *next)
{
struct data_hdr *hdr;
if(rimebuf_hdrextend(sizeof(struct data_hdr))) {
hdr = rimebuf_hdrptr();
rimeaddr_copy(&hdr->dest, to);
rimeaddr_copy(&hdr->originator, &rimeaddr_node_addr);
uc_send(&mc.dataconn, &next->nexthop);
if(c->cb->recv) {
c->cb->recv(c, from);
}
}
/*---------------------------------------------------------------------------*/
static void
send_rrep(rimeaddr_t *dest)
found_route(struct route_discovery_conn *rdc, rimeaddr_t *dest)
{
struct rrep_hdr *rrepmsg;
struct route_entry *rt;
rimebuf_clear();
rrepmsg = rimebuf_dataptr();
rimebuf_set_datalen(sizeof(struct data_hdr));
rrepmsg->hops = 0;
rimeaddr_copy(&rrepmsg->dest, dest);
rimeaddr_copy(&rrepmsg->originator, &rimeaddr_node_addr);
rt = route_lookup(dest);
if(rt != NULL) {
PRINTF("send_rrep to %d via %d\n", dest->u16, rt->nexthop.u16);
uc_send(&mc.rrepconn, &rt->nexthop);
struct mesh_conn *c = (struct mesh_conn *)
((char *)rdc - offsetof(struct mesh_conn, route_discovery_conn));
if(rimeaddr_cmp(dest, &c->queued_data_dest)) {
queuebuf_to_rimebuf(c->queued_data);
queuebuf_free(c->queued_data);
c->queued_data = NULL;
mh_send(&c->mh, dest);
}
}
/*---------------------------------------------------------------------------*/
static void
insert_route(rimeaddr_t *originator, rimeaddr_t *last_hop, u8_t hops)
route_timed_out(struct route_discovery_conn *rdc)
{
struct route_entry *rt;
rt = route_lookup(originator);
if(rt == NULL || hops < rt->hop_count) {
PRINTF("%d: Inserting %d into routing table, next hop %d, hop count %d\n",
rimeaddr_node_addr.u16, originator->u16, last_hop->u16, hops);
route_add(originator, last_hop, hops, 0);
struct mesh_conn *c = (struct mesh_conn *)
((char *)rdc - offsetof(struct mesh_conn, route_discovery_conn));
if(c->queued_data != NULL) {
queuebuf_free(c->queued_data);
}
if(c->cb->timedout) {
c->cb->timedout(c);
}
}
/*---------------------------------------------------------------------------*/
static rimeaddr_t *
handle_datapacket(rimeaddr_t *from)
{
struct data_hdr *msg = rimebuf_dataptr();
struct route_entry *rt;
rimeaddr_t dest;
PRINTF("data_packet_received from %d towards %d len %d\n", from->u16,
msg->dest.u16,
rimebuf_datalen());
/* insert_route(msg->originator, from, msg->hops);*/
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
PRINTF("for us!\n");
rimebuf_hdrreduce(sizeof(struct data_hdr));
mc.cb->recv(&msg->originator);
} else {
rimeaddr_copy(&dest, &msg->dest);
rt = route_lookup(&msg->dest);
if(rt != NULL) {
PRINTF("forwarding to %d\n", rt->nexthop.u16);
/* msg->hops++;*/
return &rt->nexthop;
/* uc_send(c, &rt->nexthop);*/
} else {
PRINTF("%d: no route to %d\n", rimeaddr_node_addr.u16, msg->dest.u16);
}
}
return NULL;
}
static const struct mh_callbacks data_callbacks = { data_packet_received, NULL };
static const struct route_discovery_callbacks route_discovery_callbacks =
{ found_route, route_timed_out };
/*---------------------------------------------------------------------------*/
static void
data_packet_received(struct uc_conn *c, rimeaddr_t *from)
void
mesh_open(struct mesh_conn *c, u16_t channels,
const struct mesh_callbacks *callbacks)
{
rimeaddr_t *forward;
forward = handle_datapacket(from);
if(forward) {
uc_send(c, forward);
}
mh_open(&c->mh, channels, &data_callbacks);
route_discovery_open(&c->route_discovery_conn, channels + 1,
&route_discovery_callbacks);
c->cb = callbacks;
}
/*---------------------------------------------------------------------------*/
void
mesh_data_received(rimeaddr_t *from)
mesh_close(struct mesh_conn *c)
{
rimeaddr_t *nexthop_addr;
nexthop_addr = handle_datapacket(from);
if(nexthop_addr && send_datapacket_handler) {
send_datapacket_handler(nexthop_addr);
}
}
/*---------------------------------------------------------------------------*/
static void
rrep_packet_received(struct uc_conn *c, rimeaddr_t *from)
{
struct rrep_hdr *msg = rimebuf_dataptr();
struct route_entry *rt;
rimeaddr_t dest;
PRINTF("rrep_packet_received from %d towards %d len %d\n", from->u16,
msg->dest.u16,
rimebuf_datalen());
insert_route(&msg->originator, from, msg->hops);
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
PRINTF("for us!\n");
if(rimeaddr_cmp(&msg->originator, &mc.queued_data_dest) &&
mc.queued_data != NULL) {
PRINTF("Got RREP for us from %d. queued packet to %d\n",
msg->originator.u16, mc.queued_data_dest.u16);
queuebuf_to_rimebuf(mc.queued_data);
mc.queued_data = NULL;
rt = route_lookup(&mc.queued_data_dest);
if(rt != NULL) {
PRINTF("Sending data to %d through %d\n", mc.queued_data_dest.u16,
rt->nexthop.u16);
send_data(&mc.queued_data_dest, rt);
}
}
} else {
rimeaddr_copy(&dest, &msg->dest);
rt = route_lookup(&msg->dest);
if(rt != NULL) {
PRINTF("forwarding to %d\n", rt->nexthop.u16);
msg->hops++;
uc_send(c, &rt->nexthop);
} else {
PRINTF("%d: no route to %d\n", rimeaddr_node_addr.u16, msg->dest.u16);
}
}
}
/*---------------------------------------------------------------------------*/
static int
rreq_packet_received(struct nf_conn *c, rimeaddr_t *from,
rimeaddr_t *originator, u8_t seqno, u8_t hops)
{
struct route_msg *msg = rimebuf_dataptr();
/* PRINTF("route_packet_received from %d hops %d\n", from, hops);*/
if(!(rimeaddr_cmp(&mc.last_rreq_originator, originator) &&
mc.last_rreq_id <= msg->rreq_id)) {
rimeaddr_copy(&mc.last_rreq_originator, originator);
mc.last_rreq_id = msg->rreq_id;
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
PRINTF("route_packet_received: route request for our ID\n");
insert_route(originator, from, hops);
/* Send route reply back to source. */
send_rrep(originator);
return 0; /* Don't continue to flood the rreq packet. */
} else {
/* PRINTF("route request for %d\n", msg->dest_id);*/
insert_route(originator, from, hops);
}
return 1;
}
return 0; /* Don't forward packet. */
}
/*---------------------------------------------------------------------------*/
static const struct uc_callbacks data_callbacks = {data_packet_received};
static const struct uc_callbacks rrep_callbacks = {rrep_packet_received};
static const struct nf_callbacks rreq_callbacks = {rreq_packet_received, NULL};
/*---------------------------------------------------------------------------*/
void
mesh_open(const struct mesh_callbacks *callbacks,
void (* send_datapacket)(rimeaddr_t *next))
{
uc_open(&mc.dataconn, CHANNEL_MESH_DATA, &data_callbacks);
uc_open(&mc.rrepconn, CHANNEL_MESH_RREP, &rrep_callbacks);
nf_open(&mc.rreqconn, CHANNEL_MESH_RREQ, &rreq_callbacks);
mc.cb = callbacks;
send_datapacket_handler = send_datapacket;
}
/*---------------------------------------------------------------------------*/
void
mesh_close(void)
{
uc_close(&mc.dataconn);
uc_close(&mc.rrepconn);
nf_close(&mc.rreqconn);
mh_close(&c->mh);
route_discovery_close(&c->route_discovery_conn);
}
/*---------------------------------------------------------------------------*/
int
mesh_send(rimeaddr_t *to)
mesh_send(struct mesh_conn *c, rimeaddr_t *to)
{
struct route_entry *rt;
int could_send;
rt = route_lookup(to);
if(rt == NULL) {
if(mc.queued_data == NULL) {
PRINTF("mesh_send: queueing data, sending rreq\n");
mc.queued_data = queuebuf_new_from_rimebuf();
rimeaddr_copy(&mc.queued_data_dest, to);
send_rreq(to);
return 1;
could_send = mh_send(&c->mh, to);
if(!could_send) {
if(c->queued_data != NULL) {
queuebuf_free(c->queued_data);
}
PRINTF("mesh_send: queueing data, sending rreq\n");
c->queued_data = queuebuf_new_from_rimebuf();
rimeaddr_copy(&c->queued_data_dest, to);
route_discovery_discover(&c->route_discovery_conn, to,
PACKET_TIMEOUT);
return 0;
} else {
PRINTF("mesh_send: sending data\n");
send_data(to, rt);
return 1;
}
return 1;
}
/*---------------------------------------------------------------------------*/

28
core/net/rime/mesh.h
View File

@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: mesh.h,v 1.4 2007/03/19 22:10:17 adamdunkels Exp $
* $Id: mesh.h,v 1.5 2007/03/22 17:34:16 adamdunkels Exp $
*/
/**
@ -42,18 +42,30 @@
#define __MESH_H__
#include "net/rime.h"
#include "net/rime/mh.h"
#include "net/rime/route-discovery.h"
struct mesh_conn;
struct mesh_callbacks {
void (* sent)(void);
void (* recv)(rimeaddr_t *from);
void (* recv)(struct mesh_conn *c, rimeaddr_t *from);
void (* sent)(struct mesh_conn *c);
void (* timedout)(struct mesh_conn *c);
};
void mesh_open(const struct mesh_callbacks *callbacks,
void (* data_send_function)(rimeaddr_t *next));
int mesh_send(rimeaddr_t *dest);
struct mesh_conn {
struct mh_conn mh;
struct route_discovery_conn route_discovery_conn;
struct queuebuf *queued_data;
rimeaddr_t queued_data_dest;
const struct mesh_callbacks *cb;
};
void mesh_data_received(rimeaddr_t *from);
void mesh_open(struct mesh_conn *c, u16_t channels,
const struct mesh_callbacks *callbacks);
void mesh_close(void);
int mesh_send(struct mesh_conn *c, rimeaddr_t *dest);
void mesh_close(struct mesh_conn *c);
#endif /* __MESH_H__ */

244
core/net/rime/route-discovery.c Normal file
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@ -0,0 +1,244 @@
/*
* 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: route-discovery.c,v 1.1 2007/03/22 17:34:16 adamdunkels Exp $
*/
/**
* \file
* Route discovery protocol
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
#include "net/rime.h"
#include "net/rime/route.h"
#include "net/rime/route-discovery.h"
#include <stddef.h> /* For offsetof */
struct route_msg {
rimeaddr_t dest;
u8_t rreq_id;
u8_t pad;
};
struct rrep_hdr {
u8_t rreq_id;
u8_t hops;
rimeaddr_t dest;
rimeaddr_t originator;
};
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
static void
send_rreq(struct route_discovery_conn *c, rimeaddr_t *dest)
{
struct route_msg *msg;
rimebuf_clear();
msg = rimebuf_dataptr();
rimebuf_set_datalen(sizeof(struct route_msg));
msg->pad = 0;
msg->rreq_id = c->rreq_id++;
rimeaddr_copy(&msg->dest, dest);
nf_send(&c->rreqconn);
}
/*---------------------------------------------------------------------------*/
static void
send_rrep(struct route_discovery_conn *c, rimeaddr_t *dest)
{
struct rrep_hdr *rrepmsg;
struct route_entry *rt;
rimebuf_clear();
rrepmsg = rimebuf_dataptr();
rimebuf_set_datalen(sizeof(struct rrep_hdr));
rrepmsg->hops = 0;
rimeaddr_copy(&rrepmsg->dest, dest);
rimeaddr_copy(&rrepmsg->originator, &rimeaddr_node_addr);
rt = route_lookup(dest);
if(rt != NULL) {
PRINTF("%d.%d: send_rrep to %d.%d via %d.%d\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
dest->u8[0],dest->u8[1],
rt->nexthop.u8[0],rt->nexthop.u8[1]);
uc_send(&c->rrepconn, &rt->nexthop);
}
}
/*---------------------------------------------------------------------------*/
static void
insert_route(rimeaddr_t *originator, rimeaddr_t *last_hop, u8_t hops)
{
struct route_entry *rt;
rt = route_lookup(originator);
if(rt == NULL || hops < rt->hop_count) {
PRINTF("%d.%d: Inserting %d.%d into routing table, next hop %d.%d, hop count %d\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
originator->u8[0], originator->u8[1],
last_hop->u8[0], last_hop->u8[1],
hops);
route_add(originator, last_hop, hops, 0);
}
}
/*---------------------------------------------------------------------------*/
static void
rrep_packet_received(struct uc_conn *uc, rimeaddr_t *from)
{
struct rrep_hdr *msg = rimebuf_dataptr();
struct route_entry *rt;
rimeaddr_t dest;
struct route_discovery_conn *c = (struct route_discovery_conn *)
((char *)uc - offsetof(struct route_discovery_conn, rrepconn));
PRINTF("%d.%d: rrep_packet_received from %d.%d towards %d.%d len %d\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
from->u8[0],from->u8[1],
msg->dest.u8[0],msg->dest.u8[1],
rimebuf_datalen());
insert_route(&msg->originator, from, msg->hops);
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
PRINTF("rrep for us!\n");
if(c->cb->new_route) {
c->cb->new_route(c, &msg->originator);
}
} else {
rimeaddr_copy(&dest, &msg->dest);
rt = route_lookup(&msg->dest);
if(rt != NULL) {
PRINTF("forwarding to %d\n", rt->nexthop.u16[0]);
msg->hops++;
uc_send(&c->rrepconn, &rt->nexthop);
} else {
PRINTF("%d: no route to %d\n", rimeaddr_node_addr.u16[0], msg->dest.u16[0]);
}
}
}
/*---------------------------------------------------------------------------*/
static int
rreq_packet_received(struct nf_conn *nf, rimeaddr_t *from,
rimeaddr_t *originator, u8_t seqno, u8_t hops)
{
struct route_msg *msg = rimebuf_dataptr();
struct route_discovery_conn *c = (struct route_discovery_conn *)
((char *)nf - offsetof(struct route_discovery_conn, rreqconn));
PRINTF("%d.%d: rreq_packet_received from %d.%d hops %d rreq_id %d last %d/%d\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
from->u8[0], from->u8[1],
hops, msg->rreq_id,
c->last_rreq_originator.u16[0],
c->last_rreq_id);
if(!(rimeaddr_cmp(&c->last_rreq_originator, originator) &&
c->last_rreq_id == msg->rreq_id)) {
PRINTF("%d.%d: rreq_packet_received: request for %d.%d originator %d.%d / %d\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1],
msg->dest.u8[0], msg->dest.u8[1],
originator->u8[0], originator->u8[1],
msg->rreq_id);
rimeaddr_copy(&c->last_rreq_originator, originator);
c->last_rreq_id = msg->rreq_id;
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
PRINTF("%d.%d: route_packet_received: route request for our address\n",
rimeaddr_node_addr.u8[0], rimeaddr_node_addr.u8[1]);
insert_route(originator, from, hops);
/* Send route reply back to source. */
send_rrep(c, originator);
return 0; /* Don't continue to flood the rreq packet. */
} else {
/* PRINTF("route request for %d\n", msg->dest_id);*/
insert_route(originator, from, hops);
}
return 1;
}
return 0; /* Don't forward packet. */
}
/*---------------------------------------------------------------------------*/
static const struct uc_callbacks rrep_callbacks = {rrep_packet_received};
static const struct nf_callbacks rreq_callbacks = {rreq_packet_received, NULL};
/*---------------------------------------------------------------------------*/
void
route_discovery_open(struct route_discovery_conn *c, u16_t channels,
const struct route_discovery_callbacks *callbacks)
{
nf_open(&c->rreqconn, channels + 0, &rreq_callbacks);
uc_open(&c->rrepconn, channels + 1, &rrep_callbacks);
c->cb = callbacks;
}
/*---------------------------------------------------------------------------*/
void
route_discovery_close(struct route_discovery_conn *c)
{
uc_close(&c->rrepconn);
nf_close(&c->rreqconn);
ctimer_stop(&c->t);
}
/*---------------------------------------------------------------------------*/
static void
timeout_handler(void *ptr)
{
struct route_discovery_conn *c = ptr;
PRINTF("route_discovery: timeout, timed out\n");
if(c->cb->timedout) {
/* c->cb->timedout(c);*/
}
}
/*---------------------------------------------------------------------------*/
void
route_discovery_discover(struct route_discovery_conn *c, rimeaddr_t *addr,
clock_time_t timeout)
{
PRINTF("route_discovery_send: sending route request\n");
ctimer_set(&c->t, timeout, timeout_handler, c);
send_rreq(c, addr);
}
/*---------------------------------------------------------------------------*/

73
core/net/rime/route-discovery.h Normal file
View File

@ -0,0 +1,73 @@
/*
* 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: route-discovery.h,v 1.1 2007/03/22 17:34:16 adamdunkels Exp $
*/
/**
* \file
* Header file for the Rime mesh routing protocol
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef __ROUTE_DISCOVERY_H__
#define __ROUTE_DISCOVERY_H__
#include "net/rime.h"
#include "net/rime/nf.h"
struct route_discovery_conn;
struct route_discovery_callbacks {
void (* new_route)(struct route_discovery_conn *c, rimeaddr_t *to);
void (* timedout)(struct route_discovery_conn *c);
};
#define ROUTE_DISCOVERY_ENTRIES 8
struct route_discovery_conn {
struct nf_conn rreqconn;
struct uc_conn rrepconn;
struct ctimer t;
rimeaddr_t last_rreq_originator;
u16_t last_rreq_id;
u16_t rreq_id;
const struct route_discovery_callbacks *cb;
};
void route_discovery_open(struct route_discovery_conn *c, u16_t channels,
const struct route_discovery_callbacks *callbacks);
void route_discovery_discover(struct route_discovery_conn *c, rimeaddr_t *dest,
clock_time_t timeout);
void route_discovery_close(struct route_discovery_conn *c);
#endif /* __ROUTE_DISCOVERY_H__ */