diff options
| author |   Vladimir Isaev <visaev@netgate.com> | 2020-07-16 17:05:18 +0300 |
|---|---|---|
| committer |   Matthew Smith <mgsmith@netgate.com> | 2020-07-31 16:02:49 +0000 |
| commit | b2f44bd8e7d226d851d4d05981914e642a4da571 (patch) | |
| tree | d9e1c242be1860237ce5d2c10f9d53c99085df9f /src | |
| parent | 5d27037d165ce55dd80aa472a367923d6a08f755 (diff) | |
ip-neighbor: Allow to replace dynamic entry
Before this patch it was not allowed to replace
a dynamic ARP entry with a static one with the
same mac-address.
Type: fix
Signed-off-by: Vladimir Isaev <visaev@netgate.com>
Change-Id: I6cfc0e510ffdf141c61874288f11a60395182374
Diffstat (limited to 'src')
| -rw-r--r-- | src/vnet/ip-neighbor/ip_neighbor.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/src/vnet/ip-neighbor/ip_neighbor.c b/src/vnet/ip-neighbor/ip_neighbor.c index 09b56058f72..4111b02d0d8 100644 --- a/src/vnet/ip-neighbor/ip_neighbor.c +++ b/src/vnet/ip-neighbor/ip_neighbor.c @@ -141,6 +141,8 @@ ip_neighbor_list_remove (ip_neighbor_t * ipn) elt = pool_elt_at_index (ip_neighbor_elt_pool, ipn->ipn_elt); clib_llist_remove (ip_neighbor_elt_pool, ipne_anchor, elt); + + ipn->ipn_elt = ~0; } } @@ -492,6 +494,17 @@ ip_neighbor_add (const ip46_address_t * ip, return -2; } + /* A dynamic entry can become static, but not vice-versa. + * i.e. since if it was programmed by the CP then it must + * be removed by the CP */ + if ((flags & IP_NEIGHBOR_FLAG_STATIC) && + !(ipn->ipn_flags & IP_NEIGHBOR_FLAG_STATIC)) + { + ip_neighbor_list_remove (ipn); + ipn->ipn_flags |= IP_NEIGHBOR_FLAG_STATIC; + ipn->ipn_flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC; + } + /* * prevent a DoS attack from the data-plane that * spams us with no-op updates to the MAC address @@ -503,17 +516,6 @@ ip_neighbor_add (const ip46_address_t * ip, } mac_address_copy (&ipn->ipn_mac, mac); - - /* A dynamic entry can become static, but not vice-versa. - * i.e. since if it was programmed by the CP then it must - * be removed by the CP */ - if ((flags & IP_NEIGHBOR_FLAG_STATIC) && - !(ipn->ipn_flags & IP_NEIGHBOR_FLAG_STATIC)) - { - ip_neighbor_list_remove (ipn); - ipn->ipn_flags |= IP_NEIGHBOR_FLAG_STATIC; - ipn->ipn_flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC; - } } else { |