/*
* 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
* border-router
* \author
* Niclas Finne <nfi@sics.se>
* Joakim Eriksson <joakime@sics.se>
* Nicolas Tsiftes <nvt@sics.se>
*/
#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"
#include "net/uip.h"
#include "net/uip-ds6.h"
#include "net/rpl/rpl.h"
#include "net/netstack.h"
#include "dev/button-sensor.h"
#include "dev/slip.h"
#include "webserver-nogui.h"
#include "httpd-simple.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define DEBUG DEBUG_PRINT
#include "net/uip-debug.h"
uint16_t dag_id[] = {0x1111, 0x1100, 0, 0, 0, 0, 0, 0x0011};
extern uip_ds6_nbr_t uip_ds6_nbr_cache[];
extern uip_ds6_route_t uip_ds6_routing_table[];
static uip_ipaddr_t prefix;
static uint8_t prefix_set;
PROCESS(border_router_process, "Border router process");
AUTOSTART_PROCESSES(&border_router_process);
/*---------------------------------------------------------------------------*/
/* Only one single web request at time */
static const char *TOP = "<html><head><title>ContikiRPL</title></head><body>\n";
static const char *BOTTOM = "</body></html>\n";
static char buf[128];
static int blen;
#define ADD(...) do { \
blen += snprintf(&buf[blen], sizeof(buf) - blen, __VA_ARGS__); \
} while(0)
/*---------------------------------------------------------------------------*/
static void
ipaddr_add(const uip_ipaddr_t *addr)
{
uint16_t a;
int i, f;
for(i = 0, f = 0; i < sizeof(uip_ipaddr_t); i += 2) {
a = (addr->u8[i] << 8) + addr->u8[i + 1];
if(a == 0 && f >= 0) {
if(f++ == 0 && sizeof(buf) - blen >= 2) {
buf[blen++] = ':';
buf[blen++] = ':';
}
} else {
if(f > 0) {
f = -1;
} else if(i > 0 && blen < sizeof(buf)) {
buf[blen++] = ':';
}
ADD("%x", a);
}
}
}
/*---------------------------------------------------------------------------*/
static
PT_THREAD(generate_routes(struct httpd_state *s))
{
static int i;
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, TOP);
blen = 0;
ADD("<h2>Neighbors</h2>");
for(i = 0; i < UIP_DS6_NBR_NB; i++) {
if(uip_ds6_nbr_cache[i].isused) {
ipaddr_add(&uip_ds6_nbr_cache[i].ipaddr);
ADD("<br>\n");
if(blen > sizeof(buf) - 45) {
SEND_STRING(&s->sout, buf);
blen = 0;
}
}
}
ADD("<h2>Routes</h2>");
SEND_STRING(&s->sout, buf);
blen = 0;
for(i = 0; i < UIP_DS6_ROUTE_NB; i++) {
if(uip_ds6_routing_table[i].isused) {
ipaddr_add(&uip_ds6_routing_table[i].ipaddr);
ADD("/%u (via ", uip_ds6_routing_table[i].length);
ipaddr_add(&uip_ds6_routing_table[i].nexthop);
if(uip_ds6_routing_table[i].state.lifetime < 600) {
ADD(") %lus<br>\n", uip_ds6_routing_table[i].state.lifetime);
} else {
ADD(")<br>\n");
}
SEND_STRING(&s->sout, buf);
blen = 0;
}
}
if(blen > 0) {
SEND_STRING(&s->sout, buf);
blen = 0;
}
SEND_STRING(&s->sout, BOTTOM);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
httpd_simple_script_t
httpd_simple_get_script(const char *name)
{
return generate_routes;
}
/*---------------------------------------------------------------------------*/
static void
print_local_addresses(void)
{
int i;
uint8_t state;
PRINTF("Server IPv6 addresses:\n");
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_TENTATIVE || state == ADDR_PREFERRED)) {
blen = 0;
ipaddr_add(&uip_ds6_if.addr_list[i].ipaddr);
PRINTF(" %s\n", buf);
}
}
}
/*---------------------------------------------------------------------------*/
void
request_prefix(void)
{
/* mess up uip_buf with a dirty request... */
uip_buf[0] = '!';
uip_buf[1] = 'P';
uip_len = 2;
slip_send();
uip_len = 0;
}
/*---------------------------------------------------------------------------*/
void
set_prefix_64(uip_ipaddr_t *prefix_64)
{
uip_ipaddr_t ipaddr;
memcpy(&prefix, prefix_64, 16);
memcpy(&ipaddr, prefix_64, 16);
prefix_set = 1;
uip_ds6_set_addr_iid(&ipaddr, &uip_lladdr);
uip_ds6_addr_add(&ipaddr, 0, ADDR_AUTOCONF);
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(border_router_process, ev, data)
{
static struct etimer et;
rpl_dag_t *dag;
PROCESS_BEGIN();
prefix_set = 0;
PROCESS_PAUSE();
process_start(&webserver_nogui_process, NULL);
SENSORS_ACTIVATE(button_sensor);
PRINTF("RPL-Border router started\n");
/* Request prefix until it has been received */
while(!prefix_set) {
etimer_set(&et, CLOCK_SECOND);
request_prefix();
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
}
dag = rpl_set_root((uip_ip6addr_t *)dag_id);
if(dag != NULL) {
rpl_set_prefix(dag, &prefix, 64);
PRINTF("created a new RPL dag\n");
}
print_local_addresses();
/* The border router runs with a 100% duty cycle in order to ensure high
packet reception rates. */
NETSTACK_MAC.off(1);
while(1) {
PROCESS_YIELD();
if (ev == sensors_event && data == &button_sensor) {
PRINTF("Initiating global repair\n");
rpl_repair_dag(rpl_get_dag(RPL_ANY_INSTANCE));
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/