deac/osd-contiki
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Best effort multi-hop routing

Browse source
This commit is contained in:
adamdunkels 2007-03-22 17:33:15 +00:00
parent 1da6d10730
commit c914d268ca
2 changed files with 211 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

147
core/net/rime/mh.c Normal file
View file

@ -0,0 +1,147 @@
/*
* 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: mh.c,v 1.1 2007/03/22 17:33:15 adamdunkels Exp $
*/
/**
* \file
* A mesh routing protocol
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "contiki.h"
#include "net/rime.h"
#include "net/rime/mh.h"
#include "net/rime/route.h"
struct data_hdr {
rimeaddr_t dest;
rimeaddr_t originator;
u8_t hops;
u8_t pad;
};
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
static void
send_data(struct mh_conn *c, 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(&c->c, &next->nexthop);
}
}
/*---------------------------------------------------------------------------*/
void
data_packet_received(struct uc_conn *uc, rimeaddr_t *from)
{
struct mh_conn *c = (struct mh_conn *)uc;
struct data_hdr *msg = rimebuf_dataptr();
struct route_entry *rt;
int should_forward;
PRINTF("data_packet_received from %d towards %d len %d\n", from->u16[0],
msg->dest.u16[0],
rimebuf_datalen());
if(rimeaddr_cmp(&msg->dest, &rimeaddr_node_addr)) {
PRINTF("for us!\n");
rimebuf_hdrreduce(sizeof(struct data_hdr));
if(c->cb->recv) {
c->cb->recv(c, &msg->originator);
}
} else {
if(c->cb->forwarding) {
should_forward = c->cb->forwarding(c);
} else {
should_forward = 1;
}
if(should_forward) {
rt = route_lookup(&msg->dest);
if(rt != NULL) {
PRINTF("forwarding to %d\n", rt->nexthop.u16[0]);
/* msg->hops++;*/
uc_send(&c->c, &rt->nexthop);
} else {
PRINTF("%d.%d: no route to %d.%d\n",
rimeaddr_node_addr.u8[0],
rimeaddr_node_addr.u8[1],
msg->dest.u8[0],
msg->dest.u8[1]);
}
}
}
}
/*---------------------------------------------------------------------------*/
static const struct uc_callbacks data_callbacks = { data_packet_received };
/*---------------------------------------------------------------------------*/
void
mh_open(struct mh_conn *c, u16_t channel,
const struct mh_callbacks *callbacks)
{
uc_open(&c->c, channel, &data_callbacks);
c->cb = callbacks;
}
/*---------------------------------------------------------------------------*/
void
mh_close(struct mh_conn *c)
{
uc_close(&c->c);
}
/*---------------------------------------------------------------------------*/
int
mh_send(struct mh_conn *c, rimeaddr_t *to)
{
struct route_entry *rt;
rt = route_lookup(to);
if(rt == NULL) {
PRINTF("mh_send: no route\n");
return 0;
} else {
PRINTF("mh_send: sending data\n");
send_data(c, to, rt);
return 1;
}
}
/*---------------------------------------------------------------------------*/

64
core/net/rime/mh.h Normal file
View file

@ -0,0 +1,64 @@
/*
* Copyright (c) 2006, 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: mh.h,v 1.1 2007/03/22 17:33:15 adamdunkels Exp $
*/
/**
* \file
* A brief description of what this file is.
* \author
* Adam Dunkels <adam@sics.se>
*/
#ifndef __MH_H__
#define __MH_H__
#include "net/rime/abc.h"
#include "net/rime/rimeaddr.h"
struct mh_conn;
struct mh_callbacks {
void (* recv)(struct mh_conn *ptr, rimeaddr_t *sender);
int (* forwarding)(struct mh_conn *ptr);
};
struct mh_conn {
struct uc_conn c;
const struct mh_callbacks *cb;
};
void mh_open(struct mh_conn *c, u16_t channel,
const struct mh_callbacks *u);
void mh_close(struct mh_conn *c);
int mh_send(struct mh_conn *c, rimeaddr_t *to);
#endif /* __MH_H__ */