From 529376be7758eec8320e695c1efb5e416f2d8c1c Mon Sep 17 00:00:00 2001
From: Simon Duquennoy <simonduq@sics.se>
Date: Wed, 6 May 2015 11:34:52 +0200
Subject: [PATCH] Added rpl_print_neighbor_list function for RPL state
 monitoring

---
 core/net/rpl/rpl-dag.c    | 25 +++++++++++++++++++++++++
 core/net/rpl/rpl-timers.c |  4 ++++
 core/net/rpl/rpl.h        |  1 +
 3 files changed, 30 insertions(+)

diff --git a/core/net/rpl/rpl-dag.c b/core/net/rpl/rpl-dag.c
index ef64ec91c..e0ca1b11b 100644
--- a/core/net/rpl/rpl-dag.c
+++ b/core/net/rpl/rpl-dag.c
@@ -81,6 +81,28 @@ NBR_TABLE(rpl_parent_t, rpl_parents);
 rpl_instance_t instance_table[RPL_MAX_INSTANCES];
 rpl_instance_t *default_instance;
 
+/*---------------------------------------------------------------------------*/
+void
+rpl_print_neighbor_list()
+{
+  if(default_instance != NULL && default_instance->current_dag != NULL &&
+      default_instance->of != NULL && default_instance->of->calculate_rank != NULL) {
+    int curr_dio_interval = default_instance->dio_intcurrent;
+    int curr_rank = default_instance->current_dag->rank;
+    rpl_parent_t *p = nbr_table_head(rpl_parents);
+
+    printf("RPL: rank %u dioint %u, %u nbr(s)\n", curr_rank, curr_dio_interval, uip_ds6_nbr_num());
+    while(p != NULL) {
+      uip_ds6_nbr_t *nbr = rpl_get_nbr(p);
+      printf("RPL: nbr %3u %5u, %5u => %5u %c\n",
+          nbr_table_get_lladdr(rpl_parents, p)->u8[7],
+          p->rank, nbr ? nbr->link_metric : 0, default_instance->of->calculate_rank(p, 0),
+          p == default_instance->current_dag->preferred_parent ? '*' : ' ');
+      p = nbr_table_next(rpl_parents, p);
+    }
+    printf("RPL: end of list\n");
+  }
+}
 /*---------------------------------------------------------------------------*/
 uip_ds6_nbr_t *
 rpl_get_nbr(rpl_parent_t *parent)
@@ -729,6 +751,9 @@ rpl_select_dag(rpl_instance_t *instance, rpl_parent_t *p)
       rpl_schedule_dao(instance);
     }
     rpl_reset_dio_timer(instance);
+#if DEBUG
+    rpl_print_neighbor_list();
+#endif
   } else if(best_dag->rank != old_rank) {
     PRINTF("RPL: Preferred parent update, rank changed from %u to %u\n",
   	(unsigned)old_rank, best_dag->rank);
diff --git a/core/net/rpl/rpl-timers.c b/core/net/rpl/rpl-timers.c
index ea7bfe7f2..a849144cf 100644
--- a/core/net/rpl/rpl-timers.c
+++ b/core/net/rpl/rpl-timers.c
@@ -166,6 +166,10 @@ handle_dio_timer(void *ptr)
     }
     new_dio_interval(instance);
   }
+
+#if DEBUG
+  rpl_print_neighbor_list();
+#endif
 }
 /*---------------------------------------------------------------------------*/
 void
diff --git a/core/net/rpl/rpl.h b/core/net/rpl/rpl.h
index 512c1a8f0..e370d5d52 100644
--- a/core/net/rpl/rpl.h
+++ b/core/net/rpl/rpl.h
@@ -251,6 +251,7 @@ rpl_rank_t rpl_get_parent_rank(uip_lladdr_t *addr);
 uint16_t rpl_get_parent_link_metric(const uip_lladdr_t *addr);
 void rpl_dag_init(void);
 uip_ds6_nbr_t *rpl_get_nbr(rpl_parent_t *parent);
+void rpl_print_neighbor_list();
 
 /**
  * RPL modes