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nes-proj/examples/ipv6/native-border-router/border-router.c
George Oikonomou a9e7bea675 Make DODAG ID selection RFC 6550-compliant 
Some calls to `rpl_set_root` select a hardcoded DODAG ID
(0x1111, 0x1100, 0, 0, 0, 0, 0, 0x0011)

This is against what RFC 6550 says. We change these calls
to select a DODAG ID corresponding to a routable v6 address
corresponding to the root
2014-06-12 00:09:53 +01:00

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/*
* Copyright (c) 2011, 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.
*
*/
/**
* \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/ip/uip.h"
#include "net/ipv6/uip-ds6.h"
#include "net/rpl/rpl.h"
#include "net/netstack.h"
#include "dev/slip.h"
#include "cmd.h"
#include "border-router.h"
#include "border-router-cmds.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define DEBUG DEBUG_FULL
#include "net/ip/uip-debug.h"
#define MAX_SENSORS 4
extern long slip_sent;
extern long slip_received;
static uip_ipaddr_t prefix;
static uint8_t prefix_set;
static uint8_t mac_set;
static uint8_t sensor_count = 0;
/* allocate MAX_SENSORS char[32]'s */
static char sensors[MAX_SENSORS][32];
extern int contiki_argc;
extern char **contiki_argv;
extern const char *slip_config_ipaddr;
CMD_HANDLERS(border_router_cmd_handler);
PROCESS(border_router_process, "Border router process");
#if WEBSERVER==0
/* No webserver */
AUTOSTART_PROCESSES(&border_router_process,&border_router_cmd_process);
#elif WEBSERVER>1
/* Use an external webserver application */
#include "webserver-nogui.h"
AUTOSTART_PROCESSES(&border_router_process,&border_router_cmd_process,
&webserver_nogui_process);
#else
/* Use simple webserver with only one page */
#include "httpd-simple.h"
PROCESS(webserver_nogui_process, "Web server");
PROCESS_THREAD(webserver_nogui_process, ev, data)
{
PROCESS_BEGIN();
httpd_init();
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
httpd_appcall(data);
}
PROCESS_END();
}
AUTOSTART_PROCESSES(&border_router_process,&border_router_cmd_process,
&webserver_nogui_process);
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;
static uip_ds6_route_t *r;
static uip_ds6_nbr_t *nbr;
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, TOP);
blen = 0;
ADD("Neighbors<pre>");
for(nbr = nbr_table_head(ds6_neighbors);
nbr != NULL;
nbr = nbr_table_next(ds6_neighbors, nbr)) {
ipaddr_add(&nbr->ipaddr);
ADD("\n");
if(blen > sizeof(buf) - 45) {
SEND_STRING(&s->sout, buf);
blen = 0;
}
}
ADD("</pre>Routes<pre>");
SEND_STRING(&s->sout, buf);
blen = 0;
for(r = uip_ds6_route_head();
r != NULL;
r = uip_ds6_route_next(r)) {
ipaddr_add(&r->ipaddr);
ADD("/%u (via ", r->length);
ipaddr_add(uip_ds6_route_nexthop(r));
if(r->state.lifetime < 600) {
ADD(") %lus\n", (unsigned long)r->state.lifetime);
} else {
ADD(")\n");
}
SEND_STRING(&s->sout, buf);
blen = 0;
}
ADD("</pre>");
//if(blen > 0) {
SEND_STRING(&s->sout, buf);
// blen = 0;
//}
if(sensor_count > 0) {
ADD("</pre>Sensors<pre>");
SEND_STRING(&s->sout, buf);
blen = 0;
for(i = 0; i < sensor_count; i++) {
ADD("%s\n", sensors[i]);
SEND_STRING(&s->sout, buf);
blen = 0;
}
ADD("</pre>");
SEND_STRING(&s->sout, buf);
}
SEND_STRING(&s->sout, BOTTOM);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
httpd_simple_script_t
httpd_simple_get_script(const char *name)
{
return generate_routes;
}
#endif /* WEBSERVER */
/*---------------------------------------------------------------------------*/
static void
print_local_addresses(void)
{
int i;
uint8_t state;
PRINTA("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)) {
PRINTA(" %p: =>", &uip_ds6_if.addr_list[i]);
uip_debug_ipaddr_print(&(uip_ds6_if.addr_list[i]).ipaddr);
PRINTA("\n");
}
}
}
/*---------------------------------------------------------------------------*/
static void
request_mac(void)
{
write_to_slip((uint8_t *)"?M", 2);
}
/*---------------------------------------------------------------------------*/
void
border_router_set_mac(const uint8_t *data)
{
memcpy(uip_lladdr.addr, data, sizeof(uip_lladdr.addr));
linkaddr_set_node_addr((linkaddr_t *)uip_lladdr.addr);
/* is this ok - should instead remove all addresses and
add them back again - a bit messy... ?*/
uip_ds6_init();
rpl_init();
mac_set = 1;
}
/*---------------------------------------------------------------------------*/
void
border_router_print_stat()
{
printf("bytes received over SLIP: %ld\n", slip_received);
printf("bytes sent over SLIP: %ld\n", slip_sent);
}
/*---------------------------------------------------------------------------*/
/* Format: <name=value>;<name=value>;...;<name=value>*/
/* this function just cut at ; and store in the sensor array */
void
border_router_set_sensors(const char *data, int len)
{
int i;
int last_pos = 0;
int sc = 0;
for(i = 0;i < len; i++) {
if(data[i] == ';') {
sensors[sc][i - last_pos] = 0;
memcpy(sensors[sc++], &data[last_pos], i - last_pos);
last_pos = i + 1; /* skip the ';' */
}
if(sc == MAX_SENSORS) {
sensor_count = sc;
return;
}
}
sensors[sc][len - last_pos] = 0;
memcpy(sensors[sc++], &data[last_pos], len - last_pos);
sensor_count = sc;
}
/*---------------------------------------------------------------------------*/
static void
set_prefix_64(const uip_ipaddr_t *prefix_64)
{
rpl_dag_t *dag;
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);
dag = rpl_set_root(RPL_DEFAULT_INSTANCE, &ipaddr);
if(dag != NULL) {
rpl_set_prefix(dag, &prefix, 64);
PRINTF("created a new RPL dag\n");
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(border_router_process, ev, data)
{
static struct etimer et;
PROCESS_BEGIN();
prefix_set = 0;
PROCESS_PAUSE();
PRINTF("RPL-Border router started\n");
slip_config_handle_arguments(contiki_argc, contiki_argv);
/* tun init is also responsible for setting up the SLIP connection */
tun_init();
while(!mac_set) {
etimer_set(&et, CLOCK_SECOND);
request_mac();
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
}
if(slip_config_ipaddr != NULL) {
uip_ipaddr_t prefix;
if(uiplib_ipaddrconv((const char *)slip_config_ipaddr, &prefix)) {
PRINTF("Setting prefix ");
PRINT6ADDR(&prefix);
PRINTF("\n");
set_prefix_64(&prefix);
} else {
PRINTF("Parse error: %s\n", slip_config_ipaddr);
exit(0);
}
}
#if DEBUG
print_local_addresses();
#endif
/* The border router runs with a 100% duty cycle in order to ensure high
packet reception rates. */
NETSTACK_MAC.off(1);
while(1) {
etimer_set(&et, CLOCK_SECOND * 2);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
/* do anything here??? */
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
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