When the MAC address of the primary interface is changed, update the originator address in the ELP and OGM skb buffers as well in order to reflect the change.

Fixes: a4b88af77e28 ("batman-adv: ELP - adding basic infrastructure") Reported-by: Marek Lindner marek@neomailbox.ch Signed-off-by: Antonio Quartulli a@unstable.cc ---

Changes from v1: - Fixes: tag added - rebased on top of maint

Changes from v2: - kernel-doc added

net/batman-adv/bat_v.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/net/batman-adv/bat_v.c b/net/batman-adv/bat_v.c index 4026f19..4547fce 100644 --- a/net/batman-adv/bat_v.c +++ b/net/batman-adv/bat_v.c @@ -72,16 +72,34 @@ static void batadv_v_iface_disable(struct batadv_hard_iface *hard_iface) batadv_v_elp_iface_disable(hard_iface); }

-static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface) -{ -} - static void batadv_v_primary_iface_set(struct batadv_hard_iface *hard_iface) { batadv_v_elp_primary_iface_set(hard_iface); batadv_v_ogm_primary_iface_set(hard_iface); }

+/** + * batadv_v_iface_update_mac - react to hard-interface MAC address change + * @hard_iface: the modified interface + * + * If the modified interface is the primary one, update the originator + * address in the ELP and OGM messages to reflect the new MAC address. + */ +static void batadv_v_iface_update_mac(struct batadv_hard_iface *hard_iface) +{ + struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); + struct batadv_hard_iface *primary_if; + + primary_if = batadv_primary_if_get_selected(bat_priv); + if (primary_if != hard_iface) + goto out; + + batadv_v_primary_iface_set(hard_iface); +out: + if (primary_if) + batadv_hardif_put(primary_if); +} + static void batadv_v_hardif_neigh_init(struct batadv_hardif_neigh_node *hardif_neigh) {