Access routing table in storing mode of RPL (Contiki / Cooja) - contiki

Question

I am able to successfully run sample code (../examples/6tisch/simple-node) where rpl-lite is implemented and after every 60 seconds root of the network print its routing table. As it uses rpl-lite, only root node stores a routing table.
I am looking for a sample code for implementing (storing mode) in this program and print the routing table of each node every 60 seconds.
I have added "MAKE_ROUTING = MAKE_ROUTING_RPL_CLASSIC" in the Make File to enable RPL-Classic
#include "contiki.h"
#include "sys/node-id.h"
#include "sys/log.h"
#include "net/ipv6/uip-ds6-route.h"
#include "net/ipv6/uip-sr.h"
#include "net/mac/tsch/tsch.h"
#include "net/routing/routing.h"
#define DEBUG DEBUG_PRINT
#include "net/ipv6/uip-debug.h"
/*---------------------------------------------------------------------------*/
PROCESS(node_process, "RPL Node");
AUTOSTART_PROCESSES(&node_process);
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(node_process, ev, data)
{
int is_coordinator;
PROCESS_BEGIN();
is_coordinator = 0;
#if CONTIKI_TARGET_COOJA || CONTIKI_TARGET_Z1
is_coordinator = (node_id == 1);
#endif
if(is_coordinator) {
NETSTACK_ROUTING.root_start();
}
NETSTACK_MAC.on();
{
static struct etimer et;
/* Print out routing tables every minute */
etimer_set(&et, CLOCK_SECOND * 60);
while(1) {
PRINTF("Routing entries: %u\n", uip_ds6_route_num_routes());
PROCESS_YIELD_UNTIL(etimer_expired(&et));
etimer_reset(&et);
}
}
PROCESS_END();
}

Answer 1

These steps worked for me:
Add MAKE_ROUTING=MAKE_ROUTING_RPL_CLASSIC to the Makefile to ensure RPL Classic is used; storing mode is on by default.
For convenience, add includes and defined that allow to use the Contiki-NG logging module:
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "App"
#define LOG_LEVEL LOG_LEVEL_DBG
Add this code to the while(1) loop:
LOG_INFO("Routing entries: %u\n", uip_ds6_route_num_routes());
uip_ds6_route_t *route = uip_ds6_route_head();
while(route) {
LOG_INFO("Route ");
LOG_INFO_6ADDR(&route->ipaddr);
LOG_INFO_("/128 via ");
LOG_INFO_6ADDR(uip_ds6_route_nexthop(route));
LOG_INFO_("\n");
route = uip_ds6_route_next(route);
}
Output on the root node:
01:00.382 ID:1 [INFO: App ] Routing entries: 7
01:00.382 ID:1 [INFO: App ] Route fd00::205:5:5:5/128 via fe80::205:5:5:5
01:00.382 ID:1 [INFO: App ] Route fd00::204:4:4:4/128 via fe80::204:4:4:4
01:00.382 ID:1 [INFO: App ] Route fd00::208:8:8:8/128 via fe80::203:3:3:3
01:00.382 ID:1 [INFO: App ] Route fd00::203:3:3:3/128 via fe80::203:3:3:3
01:00.382 ID:1 [INFO: App ] Route fd00::207:7:7:7/128 via fe80::203:3:3:3
01:00.382 ID:1 [INFO: App ] Route fd00::206:6:6:6/128 via fe80::203:3:3:3
01:00.382 ID:1 [INFO: App ] Route fd00::202:2:2:2/128 via fe80::203:3:3:3
Output on a forwarder node:
01:00.899 ID:3 [INFO: App ] Routing entries: 4
01:00.899 ID:3 [INFO: App ] Route fd00::208:8:8:8/128 via fe80::206:6:6:6
01:00.899 ID:3 [INFO: App ] Route fd00::207:7:7:7/128 via fe80::206:6:6:6
01:00.899 ID:3 [INFO: App ] Route fd00::206:6:6:6/128 via fe80::206:6:6:6
01:00.899 ID:3 [INFO: App ] Route fd00::202:2:2:2/128 via fe80::202:2:2:2