batadv_check_management_packet
res = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN);
res = batadv_check_management_packet(skb, if_incoming, BATADV_ELP_HLEN);
if (!batadv_check_management_packet(skb, if_incoming, BATADV_OGM2_HLEN))
bool batadv_check_management_packet(struct sk_buff *skb,