mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-10-08 13:54:52 +00:00
Polite broadcast primitive
This commit is contained in:
parent
5728570aa4
commit
f539f4efd8
140
core/net/rime/polite.c
Normal file
140
core/net/rime/polite.c
Normal file
@ -0,0 +1,140 @@
|
|||||||
|
/**
|
||||||
|
* \addtogroup rimepolite
|
||||||
|
* @{
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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: polite.c,v 1.1 2007/05/15 07:41:22 adamdunkels Exp $
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \file
|
||||||
|
* Polite Anonymous best effort local area BroadCast (polite)
|
||||||
|
* \author
|
||||||
|
* Adam Dunkels <adam@sics.se>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "net/rime.h"
|
||||||
|
#include "net/rime/polite.h"
|
||||||
|
#include "lib/rand.h"
|
||||||
|
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#define MAX(a,b) ((a)>(b)?(a):(b))
|
||||||
|
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
static void
|
||||||
|
recv(struct abc_conn *abc)
|
||||||
|
{
|
||||||
|
struct polite_conn *c = (struct polite_conn *)abc;
|
||||||
|
if(c->q != NULL &&
|
||||||
|
rimebuf_datalen() == queuebuf_datalen(c->q) &&
|
||||||
|
memcmp(rimebuf_dataptr(), queuebuf_dataptr(c->q),
|
||||||
|
MAX(c->hdrsize, rimebuf_datalen())) == 0) {
|
||||||
|
/* We received a copy of our own packet, so we do not send out
|
||||||
|
packet. */
|
||||||
|
queuebuf_free(c->q);
|
||||||
|
c->q = NULL;
|
||||||
|
ctimer_stop(&c->t);
|
||||||
|
if(c->cb->dropped) {
|
||||||
|
c->cb->dropped(c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(c->cb->recv) {
|
||||||
|
c->cb->recv(c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
static void
|
||||||
|
send(void *ptr)
|
||||||
|
{
|
||||||
|
struct polite_conn *c = ptr;
|
||||||
|
|
||||||
|
if(c->q != NULL) {
|
||||||
|
queuebuf_to_rimebuf(c->q);
|
||||||
|
queuebuf_free(c->q);
|
||||||
|
c->q = NULL;
|
||||||
|
abc_send(&c->c);
|
||||||
|
if(c->cb->sent) {
|
||||||
|
c->cb->sent(c);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
static const struct abc_callbacks abc = { recv };
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
void
|
||||||
|
polite_open(struct polite_conn *c, u16_t channel,
|
||||||
|
const struct polite_callbacks *cb)
|
||||||
|
{
|
||||||
|
abc_open(&c->c, channel, &abc);
|
||||||
|
c->cb = cb;
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
void
|
||||||
|
polite_close(struct polite_conn *c)
|
||||||
|
{
|
||||||
|
abc_close(&c->c);
|
||||||
|
ctimer_stop(&c->t);
|
||||||
|
if(c->q != NULL) {
|
||||||
|
queuebuf_free(c->q);
|
||||||
|
c->q = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
int
|
||||||
|
polite_send(struct polite_conn *c, clock_time_t interval, u8_t hdrsize)
|
||||||
|
{
|
||||||
|
if(c->q != NULL) {
|
||||||
|
/* If we are already about to send a packet, we cancel the old one. */
|
||||||
|
queuebuf_free(c->q);
|
||||||
|
}
|
||||||
|
c->hdrsize = hdrsize;
|
||||||
|
c->q = queuebuf_new_from_rimebuf();
|
||||||
|
if(c->q != NULL) {
|
||||||
|
ctimer_set(&c->t, interval / 2 + (random_rand() % (interval / 2)), send, c);
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
void
|
||||||
|
polite_cancel(struct polite_conn *c)
|
||||||
|
{
|
||||||
|
ctimer_stop(&c->t);
|
||||||
|
if(c->q != NULL) {
|
||||||
|
queuebuf_free(c->q);
|
||||||
|
c->q = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/*---------------------------------------------------------------------------*/
|
||||||
|
/** @} */
|
89
core/net/rime/polite.h
Normal file
89
core/net/rime/polite.h
Normal file
@ -0,0 +1,89 @@
|
|||||||
|
/**
|
||||||
|
* \addtogroup rime
|
||||||
|
* @{
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \defgroup rimepolite Polite anonymous best effort local broadcast
|
||||||
|
* @{
|
||||||
|
*
|
||||||
|
* The polite module sends one anonymous packet that is unique within a
|
||||||
|
* time interval.
|
||||||
|
*
|
||||||
|
* \section channels Channels
|
||||||
|
*
|
||||||
|
* The polite module uses 1 channel.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* 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: polite.h,v 1.1 2007/05/15 07:41:22 adamdunkels Exp $
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \file
|
||||||
|
* Header file for Polite Anonymous best effort local Broadcast (polite)
|
||||||
|
* \author
|
||||||
|
* Adam Dunkels <adam@sics.se>
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __POLITE_H__
|
||||||
|
#define __POLITE_H__
|
||||||
|
|
||||||
|
#include "net/rime.h"
|
||||||
|
|
||||||
|
struct polite_conn;
|
||||||
|
|
||||||
|
struct polite_callbacks {
|
||||||
|
void (* recv)(struct polite_conn *c);
|
||||||
|
void (* sent)(struct polite_conn *c);
|
||||||
|
void (* dropped)(struct polite_conn *c);
|
||||||
|
};
|
||||||
|
|
||||||
|
struct polite_conn {
|
||||||
|
struct abc_conn c;
|
||||||
|
const struct polite_callbacks *cb;
|
||||||
|
struct ctimer t;
|
||||||
|
struct queuebuf *q;
|
||||||
|
u8_t hdrsize;
|
||||||
|
};
|
||||||
|
|
||||||
|
void polite_open(struct polite_conn *c, u16_t channel,
|
||||||
|
const struct polite_callbacks *cb);
|
||||||
|
void polite_close(struct polite_conn *c);
|
||||||
|
int polite_send(struct polite_conn *c, clock_time_t interval, u8_t hdrsize);
|
||||||
|
void polite_cancel(struct polite_conn *c);
|
||||||
|
|
||||||
|
#endif /* __POLITE_H__ */
|
||||||
|
|
||||||
|
/** @} */
|
||||||
|
/** @} */
|
Loading…
Reference in New Issue
Block a user