nes-proj/examples/ipv6/rpl-simple/node.c

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/*
* 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.
*
*/
#include "contiki.h"
#include "lib/random.h"
#include "sys/ctimer.h"
#include "net/ip/uip.h"
#include "net/ipv6/uip-ds6.h"
#include "net/ip/uip-udp-packet.h"
#include "rpl.h"
#include "rpl-dag-root.h"
#include "node-id.h"
#include "simple-udp.h"
#include "sys/ctimer.h"
#include <stdio.h>
#include <string.h>
#include "dev/serial-line.h"
#include "net/ipv6/uip-ds6-route.h"
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "App"
#define LOG_LEVEL LOG_LEVEL_INFO
#define UDP_PORT 8765
#define START_INTERVAL (5 * CLOCK_SECOND)
#define SEND_INTERVAL (30 * CLOCK_SECOND)
static struct simple_udp_connection udp_conn;
static uip_ipaddr_t node_ipaddr;
static uip_ipaddr_t root_ipaddr;
static uip_ipaddr_t destination_ipaddr;
/*---------------------------------------------------------------------------*/
PROCESS(node_process, "RPL Simple Process");
AUTOSTART_PROCESSES(&node_process);
/*---------------------------------------------------------------------------*/
static void
receiver(struct simple_udp_connection *c,
const uip_ipaddr_t *sender_addr,
uint16_t sender_port,
const uip_ipaddr_t *receiver_addr,
uint16_t receiver_port,
const uint8_t *data,
uint16_t datalen)
{
unsigned seq_id;
memcpy(&seq_id, data, sizeof(int));
if(uip_ip6addr_cmp(&destination_ipaddr, &node_ipaddr)) {
LOG_INFO("received request %u from ", seq_id);
LOG_INFO_6ADDR(sender_addr);
LOG_INFO_("\n");
LOG_INFO("sending reply %u to ", seq_id);
LOG_INFO_6ADDR(sender_addr);
LOG_INFO_("\n");
simple_udp_sendto(&udp_conn, &seq_id, sizeof(seq_id), sender_addr);
} else {
static unsigned reply_count = 0;
reply_count++;
LOG_INFO("received reply %u (%u/%u) from ", seq_id, reply_count, seq_id);
LOG_INFO_6ADDR(sender_addr);
LOG_INFO_("\n");
}
}
/*---------------------------------------------------------------------------*/
static void
send_packet(void *ptr)
{
if(rpl_is_reachable()) {
static unsigned seq_id = 0;
LOG_INFO("sending request %u to ", ++seq_id);
LOG_INFO_6ADDR(&destination_ipaddr);
LOG_INFO_("\n");
simple_udp_sendto(&udp_conn, &seq_id, sizeof(seq_id), &destination_ipaddr);
} else {
LOG_INFO("not connected yet\n");
}
}
/*---------------------------------------------------------------------------*/
static void
get_global_address(void)
{
int i;
uint8_t state;
for(i = 0; i < UIP_DS6_ADDR_NB; i++) {
state = uip_ds6_if.addr_list[i].state;
if(uip_ds6_if.addr_list[i].isused &&
state == ADDR_PREFERRED &&
!uip_is_addr_linklocal(&uip_ds6_if.addr_list[i].ipaddr)) {
uip_ip6addr_copy(&node_ipaddr, &uip_ds6_if.addr_list[i].ipaddr);
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(node_process, ev, data)
{
static struct etimer periodic;
static struct ctimer backoff_timer;
PROCESS_BEGIN();
/* Hardcoded IPv6 addresses */
uip_ip6addr(&root_ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0x0212, 0x7401, 0x0001, 0x0101);
uip_ip6addr(&destination_ipaddr, UIP_DS6_DEFAULT_PREFIX, 0, 0, 0, 0x0212, 0x7401, 0x0001, 0x0101);
rpl_dag_root_init(NULL, NULL);
get_global_address();
/* Configure root */
if(uip_ip6addr_cmp(&root_ipaddr, &node_ipaddr)) {
rpl_dag_root_init_dag_immediately();
}
/* New connection with remote host */
simple_udp_register(&udp_conn, UDP_PORT, NULL, UDP_PORT, receiver);
/* Wait for START_INTERVAL */
etimer_set(&periodic, START_INTERVAL);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&periodic));
#if MAC_CONF_WITH_TSCH
NETSTACK_MAC.on();
#endif /* MAC_CONF_WITH_TSCH */
if(!uip_ip6addr_cmp(&destination_ipaddr, &node_ipaddr)) {
/* Send data periodically */
etimer_set(&periodic, SEND_INTERVAL);
while(1) {
PROCESS_YIELD();
if(etimer_expired(&periodic)) {
etimer_reset(&periodic);
ctimer_set(&backoff_timer, random_rand() % (SEND_INTERVAL), send_packet, NULL);
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/