From 48a241789265cae9f3f3744b0d9a004c4d067cb4 Mon Sep 17 00:00:00 2001
From: xnumad <34810600+xnumad@users.noreply.github.com>
Date: Mon, 26 Aug 2024 10:50:20 +0200
Subject: [PATCH] gnrc/ipv6: `nib route`: hide off-link PLEs

---
 sys/include/net/gnrc/ipv6/nib/ft.h           | 3 ++-
 sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/include/net/gnrc/ipv6/nib/ft.h b/sys/include/net/gnrc/ipv6/nib/ft.h
index 817c5a394e..0d8182ce58 100644
--- a/sys/include/net/gnrc/ipv6/nib/ft.h
+++ b/sys/include/net/gnrc/ipv6/nib/ft.h
@@ -112,7 +112,8 @@ void gnrc_ipv6_nib_ft_del(const ipv6_addr_t *dst, unsigned dst_len);
  *
  * The iteration over all forwarding table entries in the NIB includes all
  * entries added via @p gnrc_ipv6_nib_ft_add() and entries that are currently
- * in the Destination Cache, in the Prefix List, and in the Default Router List.
+ * in the Destination Cache, in the Prefix List (only if they're on-link),
+ * and in the Default Router List.
  *
  * Usage example:
  *
diff --git a/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c b/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c
index f739de1df1..afbaf5f3ba 100644
--- a/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c
+++ b/sys/net/gnrc/network_layer/ipv6/nib/nib_ft.c
@@ -133,6 +133,7 @@ bool gnrc_ipv6_nib_ft_iter(const ipv6_addr_t *next_hop, unsigned iface,
         while ((offl = _nib_offl_iter(offl))) {
             assert(offl->mode != 0);
             if ((offl->next_hop != NULL) &&
+                (offl->mode != _PL || offl->flags & _PFX_ON_LINK) &&
                 ((iface == 0) || (iface == _nib_onl_get_if(offl->next_hop))) &&
                 ((next_hop == NULL) || ipv6_addr_equal(&offl->next_hop->ipv6,
                                                        next_hop))) {