2016-05-30 21:34:11 +00:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2010, Loughborough University - 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.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* \file
|
2017-05-13 11:09:58 +00:00
|
|
|
* This file shows the implementations of the Enhanced Stateless
|
2016-05-30 21:34:11 +00:00
|
|
|
* Multicast RPL Forwarding (ESMRF)
|
|
|
|
*
|
|
|
|
* It will only work in RPL networks in MOP 3 "Storing with Multicast"
|
|
|
|
*
|
|
|
|
* \author
|
|
|
|
* Khaled Qorany kqorany2@gmail.com
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "contiki.h"
|
|
|
|
#include "contiki-net.h"
|
|
|
|
#include "net/ipv6/multicast/uip-mcast6.h"
|
|
|
|
#include "net/ipv6/multicast/uip-mcast6-route.h"
|
|
|
|
#include "net/ipv6/multicast/uip-mcast6-stats.h"
|
|
|
|
#include "net/ipv6/multicast/esmrf.h"
|
2017-12-09 08:53:48 +00:00
|
|
|
#include "net/routing/routing.h"
|
2017-09-22 13:06:44 +00:00
|
|
|
#include "net/ipv6/uip.h"
|
2016-05-30 21:34:11 +00:00
|
|
|
#include "net/netstack.h"
|
2017-05-13 11:09:58 +00:00
|
|
|
#include "net/packetbuf.h"
|
2017-12-10 20:20:24 +00:00
|
|
|
#if ROUTING_CONF_RPL_LITE
|
2017-12-10 20:13:47 +00:00
|
|
|
#include "net/routing/rpl-lite/rpl.h"
|
2017-12-10 20:20:24 +00:00
|
|
|
#endif /* ROUTING_CONF_RPL_LITE */
|
|
|
|
#if ROUTING_CONF_RPL_CLASSIC
|
2017-12-10 20:13:47 +00:00
|
|
|
#include "net/routing/rpl-classic/rpl.h"
|
2017-12-10 20:20:24 +00:00
|
|
|
#endif /* ROUTING_CONF_RPL_CLASSIC */
|
2016-05-30 21:34:11 +00:00
|
|
|
#include <string.h>
|
|
|
|
|
|
|
|
extern uint16_t uip_slen;
|
|
|
|
|
|
|
|
#define DEBUG NONE
|
2017-09-22 13:06:44 +00:00
|
|
|
#include "net/ipv6/uip-debug.h"
|
2016-05-30 21:34:11 +00:00
|
|
|
|
|
|
|
#define ESMRF_VERBOSE NONE
|
|
|
|
|
|
|
|
#if DEBUG && ESMRF_VERBOSE
|
|
|
|
#define VERBOSE_PRINTF(...) PRINTF(__VA_ARGS__)
|
|
|
|
#define VERBOSE_PRINT_SEED(s) PRINT_SEED(s)
|
|
|
|
#else
|
|
|
|
#define VERBOSE_PRINTF(...)
|
|
|
|
#define VERBOSE_PRINT_SEED(...)
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* Maintain Stats */
|
|
|
|
#if UIP_MCAST6_STATS
|
|
|
|
static struct esmrf_stats stats;
|
|
|
|
|
|
|
|
#define ESMRF_STATS_ADD(x) stats.x++
|
|
|
|
#define ESMRF_STATS_INIT() do { memset(&stats, 0, sizeof(stats)); } while(0)
|
|
|
|
#else /* UIP_MCAST6_STATS */
|
|
|
|
#define ESMRF_STATS_ADD(x)
|
|
|
|
#define ESMRF_STATS_INIT()
|
|
|
|
#endif
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* Macros */
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* CCI */
|
2017-05-17 12:34:29 +00:00
|
|
|
#define ESMRF_FWD_DELAY() (CLOCK_SECOND / 8)
|
2016-05-30 21:34:11 +00:00
|
|
|
/* Number of slots in the next 500ms */
|
|
|
|
#define ESMRF_INTERVAL_COUNT ((CLOCK_SECOND >> 2) / fwd_delay)
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* Internal Data */
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static struct ctimer mcast_periodic;
|
|
|
|
static uint8_t mcast_len;
|
|
|
|
static uip_buf_t mcast_buf;
|
|
|
|
static uint8_t fwd_delay;
|
|
|
|
static uint8_t fwd_spread;
|
|
|
|
static struct uip_udp_conn *c;
|
|
|
|
static uip_ipaddr_t src_ip;
|
|
|
|
static uip_ipaddr_t des_ip;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* Local function prototypes */
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void icmp_input(void);
|
|
|
|
static void icmp_output(void);
|
|
|
|
static void mcast_fwd(void *p);
|
|
|
|
int remove_ext_hdr(void);
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* Internal Data Structures */
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
struct multicast_on_behalf{ /* ICMP message of multicast_on_behalf */
|
|
|
|
uint16_t mcast_port;
|
|
|
|
uip_ipaddr_t mcast_ip;
|
|
|
|
uint8_t mcast_payload[UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN];
|
|
|
|
};
|
|
|
|
#define UIP_ICMP_MOB 18 /* Size of multicast_on_behalf ICMP header */
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* Temporary Stores */
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static struct multicast_on_behalf *locmobptr;
|
|
|
|
static int loclen;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/* ESMRF ICMPv6 handler declaration */
|
|
|
|
UIP_ICMP6_HANDLER(esmrf_icmp_handler, ICMP6_ESMRF,
|
|
|
|
UIP_ICMP6_HANDLER_CODE_ANY, icmp_input);
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
|
|
icmp_output()
|
|
|
|
{
|
|
|
|
uint16_t payload_len=0;
|
|
|
|
rpl_dag_t *dag_t;
|
|
|
|
|
|
|
|
struct multicast_on_behalf *mob;
|
|
|
|
mob = (struct multicast_on_behalf *)UIP_ICMP_PAYLOAD;
|
|
|
|
memcpy(&mob->mcast_payload, &uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN], uip_slen);
|
|
|
|
|
|
|
|
UIP_IP_BUF->vtc = 0x60;
|
|
|
|
UIP_IP_BUF->tcflow = 0;
|
|
|
|
UIP_IP_BUF->flow = 0;
|
|
|
|
UIP_IP_BUF->proto = UIP_PROTO_ICMP6;
|
|
|
|
UIP_IP_BUF->ttl = ESMRF_IP_HOP_LIMIT;
|
|
|
|
|
|
|
|
mob->mcast_port = (uint16_t) uip_udp_conn->rport;
|
|
|
|
uip_ipaddr_copy(&mob->mcast_ip, &UIP_IP_BUF->destipaddr);
|
|
|
|
|
|
|
|
payload_len = UIP_ICMP_MOB + uip_slen;
|
|
|
|
|
|
|
|
dag_t = rpl_get_any_dag();
|
|
|
|
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &dag_t->dag_id);
|
|
|
|
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
|
|
|
|
|
|
|
|
VERBOSE_PRINTF("ESMRF: ICMPv6 Out - Hdr @ %p, payload @ %p to: ", UIP_ICMP_BUF, mob);
|
|
|
|
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
|
|
|
|
PRINTF("\n");
|
|
|
|
|
|
|
|
UIP_IP_BUF->len[0] = (UIP_ICMPH_LEN + payload_len) >> 8;
|
|
|
|
UIP_IP_BUF->len[1] = (UIP_ICMPH_LEN + payload_len) & 0xff;
|
|
|
|
|
|
|
|
UIP_ICMP_BUF->type = ICMP6_ESMRF;
|
|
|
|
UIP_ICMP_BUF->icode = ESMRF_ICMP_CODE;
|
|
|
|
|
|
|
|
UIP_ICMP_BUF->icmpchksum = 0;
|
|
|
|
UIP_ICMP_BUF->icmpchksum = ~uip_icmp6chksum();
|
|
|
|
|
|
|
|
uip_len = UIP_IPH_LEN + UIP_ICMPH_LEN + payload_len;
|
|
|
|
|
|
|
|
VERBOSE_PRINTF("ESMRF: ICMPv6 Out - %u bytes, uip_len %u bytes, uip_ext_len %u bytes\n",
|
|
|
|
payload_len, uip_len, uip_ext_len);
|
|
|
|
|
|
|
|
tcpip_ipv6_output();
|
|
|
|
ESMRF_STATS_ADD(icmp_out);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
|
|
icmp_input()
|
|
|
|
{
|
|
|
|
#if UIP_CONF_IPV6_CHECKS
|
|
|
|
if(UIP_ICMP_BUF->icode != ESMRF_ICMP_CODE) {
|
|
|
|
PRINTF("ESMRF: ICMPv6 In, bad ICMP code\n");
|
|
|
|
ESMRF_STATS_ADD(icmp_bad);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if(UIP_IP_BUF->ttl <= 1) {
|
|
|
|
PRINTF("ESMRF: ICMPv6 In, bad TTL\n");
|
|
|
|
ESMRF_STATS_ADD(icmp_bad);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
remove_ext_hdr();
|
|
|
|
|
|
|
|
PRINTF("ESMRF: ICMPv6 In from ");
|
|
|
|
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
|
|
|
|
PRINTF(" len %u, ext %u\n", uip_len, uip_ext_len);
|
|
|
|
|
|
|
|
ESMRF_STATS_ADD(icmp_in);
|
|
|
|
|
|
|
|
VERBOSE_PRINTF("ESMRF: ICMPv6 In, parse from %p to %p\n",
|
|
|
|
UIP_ICMP_PAYLOAD,
|
|
|
|
(uint8_t *)UIP_ICMP_PAYLOAD + uip_len -
|
|
|
|
uip_l2_l3_icmp_hdr_len);
|
|
|
|
|
|
|
|
|
|
|
|
locmobptr = (struct multicast_on_behalf *) UIP_ICMP_PAYLOAD;
|
|
|
|
loclen = uip_len - (uip_l2_l3_icmp_hdr_len + UIP_ICMP_MOB);
|
|
|
|
|
|
|
|
uip_ipaddr_copy(&src_ip, &UIP_IP_BUF->srcipaddr);
|
|
|
|
uip_ipaddr_copy(&des_ip, &UIP_IP_BUF->destipaddr);
|
|
|
|
|
|
|
|
/* Extract the original multicast message */
|
|
|
|
uip_ipaddr_copy(&c->ripaddr, &locmobptr->mcast_ip);
|
|
|
|
c->rport = locmobptr->mcast_port;
|
|
|
|
uip_slen = loclen;
|
|
|
|
uip_udp_conn=c;
|
|
|
|
memcpy(&uip_buf[UIP_LLH_LEN + UIP_IPUDPH_LEN], locmobptr->mcast_payload,
|
|
|
|
loclen > UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN?
|
|
|
|
UIP_BUFSIZE - UIP_LLH_LEN - UIP_IPUDPH_LEN: loclen);
|
|
|
|
|
|
|
|
uip_process(UIP_UDP_SEND_CONN);
|
|
|
|
|
2017-12-07 13:04:53 +00:00
|
|
|
memcpy(&mcast_buf, &uip_buf[UIP_LLH_LEN], uip_len);
|
2016-05-30 21:34:11 +00:00
|
|
|
mcast_len = uip_len;
|
2017-05-13 11:09:58 +00:00
|
|
|
/* pass the packet to our uip_process to check if it is allowed to
|
2016-05-30 21:34:11 +00:00
|
|
|
* accept this packet or not */
|
|
|
|
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &src_ip);
|
|
|
|
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &des_ip);
|
|
|
|
UIP_UDP_BUF->udpchksum = 0;
|
2017-05-13 11:09:58 +00:00
|
|
|
|
2016-05-30 21:34:11 +00:00
|
|
|
uip_process(UIP_DATA);
|
|
|
|
|
2017-12-07 13:04:53 +00:00
|
|
|
memcpy(&uip_buf[UIP_LLH_LEN], &mcast_buf, mcast_len);
|
2016-05-30 21:34:11 +00:00
|
|
|
uip_len = mcast_len;
|
|
|
|
/* Return the IP of the original Multicast sender */
|
|
|
|
uip_ipaddr_copy(&UIP_IP_BUF->srcipaddr, &src_ip);
|
|
|
|
UIP_UDP_BUF->udpchksum = 0;
|
|
|
|
/* If we have an entry in the multicast routing table, something with
|
|
|
|
* a higher RPL rank (somewhere down the tree) is a group member */
|
|
|
|
if(uip_mcast6_route_lookup(&UIP_IP_BUF->destipaddr)) {
|
|
|
|
PRINTF("ESMRF: Forward this packet\n");
|
|
|
|
/* If we enter here, we will definitely forward */
|
|
|
|
tcpip_ipv6_output();
|
|
|
|
}
|
|
|
|
uip_clear_buf();
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
|
|
mcast_fwd(void *p)
|
|
|
|
{
|
2017-12-07 13:04:53 +00:00
|
|
|
memcpy(&uip_buf[UIP_LLH_LEN], &mcast_buf, mcast_len);
|
2016-05-30 21:34:11 +00:00
|
|
|
uip_len = mcast_len;
|
|
|
|
UIP_IP_BUF->ttl--;
|
|
|
|
tcpip_output(NULL);
|
|
|
|
uip_clear_buf();
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static uint8_t
|
|
|
|
in()
|
|
|
|
{
|
|
|
|
rpl_dag_t *d; /* Our DODAG */
|
|
|
|
uip_ipaddr_t *parent_ipaddr; /* Our pref. parent's IPv6 address */
|
|
|
|
const uip_lladdr_t *parent_lladdr; /* Our pref. parent's LL address */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Fetch a pointer to the LL address of our preferred parent
|
|
|
|
*
|
|
|
|
* ToDo: This rpl_get_any_dag() call is a dirty replacement of the previous
|
|
|
|
* rpl_get_dag(RPL_DEFAULT_INSTANCE);
|
|
|
|
* so that things can compile with the new RPL code. This needs updated to
|
|
|
|
* read instance ID from the RPL HBHO and use the correct parent accordingly
|
|
|
|
*/
|
|
|
|
d = rpl_get_any_dag();
|
|
|
|
if(!d) {
|
|
|
|
PRINTF("ESMRF: No DODAG\n");
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_dropped);
|
|
|
|
return UIP_MCAST6_DROP;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Retrieve our preferred parent's LL address */
|
2017-06-10 12:35:39 +00:00
|
|
|
parent_ipaddr = rpl_parent_get_ipaddr(d->preferred_parent);
|
2016-05-30 21:34:11 +00:00
|
|
|
parent_lladdr = uip_ds6_nbr_lladdr_from_ipaddr(parent_ipaddr);
|
|
|
|
|
|
|
|
if(parent_lladdr == NULL) {
|
2017-12-07 13:04:53 +00:00
|
|
|
PRINTF("ESMRF: No Parent found\n");
|
2016-05-30 21:34:11 +00:00
|
|
|
UIP_MCAST6_STATS_ADD(mcast_dropped);
|
|
|
|
return UIP_MCAST6_DROP;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We accept a datagram if it arrived from our preferred parent, discard
|
|
|
|
* otherwise.
|
|
|
|
*/
|
|
|
|
if(memcmp(parent_lladdr, packetbuf_addr(PACKETBUF_ADDR_SENDER),
|
|
|
|
UIP_LLADDR_LEN)) {
|
|
|
|
PRINTF("ESMRF: Routable in but ESMRF ignored it\n");
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_dropped);
|
|
|
|
return UIP_MCAST6_DROP;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(UIP_IP_BUF->ttl <= 1) {
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_dropped);
|
2017-12-07 13:04:53 +00:00
|
|
|
PRINTF("ESMRF: TTL too low\n");
|
2016-05-30 21:34:11 +00:00
|
|
|
return UIP_MCAST6_DROP;
|
|
|
|
}
|
|
|
|
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_in_all);
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_in_unique);
|
|
|
|
|
|
|
|
/* If we have an entry in the mcast routing table, something with
|
|
|
|
* a higher RPL rank (somewhere down the tree) is a group member */
|
|
|
|
if(uip_mcast6_route_lookup(&UIP_IP_BUF->destipaddr)) {
|
|
|
|
/* If we enter here, we will definitely forward */
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_fwd);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Add a delay (D) of at least ESMRF_FWD_DELAY() to compensate for how
|
|
|
|
* contikimac handles broadcasts. We can't start our TX before the sender
|
|
|
|
* has finished its own.
|
|
|
|
*/
|
|
|
|
fwd_delay = ESMRF_FWD_DELAY();
|
|
|
|
|
|
|
|
/* Finalise D: D = min(ESMRF_FWD_DELAY(), ESMRF_MIN_FWD_DELAY) */
|
|
|
|
#if ESMRF_MIN_FWD_DELAY
|
|
|
|
if(fwd_delay < ESMRF_MIN_FWD_DELAY) {
|
|
|
|
fwd_delay = ESMRF_MIN_FWD_DELAY;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if(fwd_delay == 0) {
|
|
|
|
/* No delay required, send it, do it now, why wait? */
|
|
|
|
UIP_IP_BUF->ttl--;
|
|
|
|
tcpip_output(NULL);
|
|
|
|
UIP_IP_BUF->ttl++; /* Restore before potential upstack delivery */
|
|
|
|
} else {
|
|
|
|
/* Randomise final delay in [D , D*Spread], step D */
|
|
|
|
fwd_spread = ESMRF_INTERVAL_COUNT;
|
|
|
|
if(fwd_spread > ESMRF_MAX_SPREAD) {
|
|
|
|
fwd_spread = ESMRF_MAX_SPREAD;
|
|
|
|
}
|
|
|
|
if(fwd_spread) {
|
|
|
|
fwd_delay = fwd_delay * (1 + ((random_rand() >> 11) % fwd_spread));
|
|
|
|
}
|
|
|
|
|
2017-12-07 13:04:53 +00:00
|
|
|
memcpy(&mcast_buf, &uip_buf[UIP_LLH_LEN], uip_len);
|
2016-05-30 21:34:11 +00:00
|
|
|
mcast_len = uip_len;
|
|
|
|
ctimer_set(&mcast_periodic, fwd_delay, mcast_fwd, NULL);
|
|
|
|
}
|
|
|
|
PRINTF("ESMRF: %u bytes: fwd in %u [%u]\n",
|
|
|
|
uip_len, fwd_delay, fwd_spread);
|
2017-12-07 13:04:53 +00:00
|
|
|
} else {
|
|
|
|
PRINTF("ESMRF: Group unknown, dropping\n");
|
2016-05-30 21:34:11 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Done with this packet unless we are a member of the mcast group */
|
|
|
|
if(!uip_ds6_is_my_maddr(&UIP_IP_BUF->destipaddr)) {
|
|
|
|
PRINTF("ESMRF: Not a group member. No further processing\n");
|
|
|
|
return UIP_MCAST6_DROP;
|
|
|
|
} else {
|
|
|
|
PRINTF("ESMRF: Ours. Deliver to upper layers\n");
|
|
|
|
UIP_MCAST6_STATS_ADD(mcast_in_ours);
|
|
|
|
return UIP_MCAST6_ACCEPT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
|
|
init()
|
|
|
|
{
|
2018-09-09 19:24:36 +00:00
|
|
|
ESMRF_STATS_INIT();
|
|
|
|
UIP_MCAST6_STATS_INIT(&stats);
|
|
|
|
|
2016-05-30 21:34:11 +00:00
|
|
|
uip_mcast6_route_init();
|
|
|
|
/* Register the ICMPv6 input handler */
|
|
|
|
uip_icmp6_register_input_handler(&esmrf_icmp_handler);
|
|
|
|
c = udp_new(NULL, 0, NULL);
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
|
|
out(void)
|
|
|
|
{
|
|
|
|
rpl_dag_t *dag_t;
|
|
|
|
dag_t = rpl_get_any_dag();
|
|
|
|
if (!dag_t){
|
|
|
|
PRINTF("ESMRF: There is no DODAG\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if(dag_t->rank == 256){
|
|
|
|
PRINTF("ESMRF: I am the Root, thus send the multicast packet normally. \n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
else{
|
|
|
|
PRINTF("ESMRF: I am not the Root\n");
|
|
|
|
PRINTF("Send multicast-on-befalf message (ICMPv6) instead to ");
|
|
|
|
PRINT6ADDR(&dag_t->dag_id);
|
|
|
|
PRINTF("\n");
|
|
|
|
icmp_output();
|
|
|
|
uip_slen=0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
const struct uip_mcast6_driver esmrf_driver = {
|
|
|
|
"ESMRF",
|
|
|
|
init,
|
|
|
|
out,
|
|
|
|
in,
|
|
|
|
};
|
|
|
|
/*---------------------------------------------------------------------------*/
|