# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

# Copyright © 2018-2019 Hugo Levy-Falk <hugo@klafyvel.me>

# Table checkmac, à bas le spoof d'ips.

table inet firewall {
	set ip_mac {
		type ipv4_addr . ether_addr
	}
	chain checkmac {
		meta iifname $if_adherent ip saddr . ether saddr != @ip_mac drop
		meta iifname $if_aloes ip saddr . ether saddr != @ip_mac drop
	}
}

# Note :
# - On pourra afficher le set checkmac comme ceci :
# 	nft list set firewall ip_mac
#
# - On pourra ajouter des éléments comme ceci :
# 	nft add element firewall ip_mac { 10.69.6.91 . aa:bb:cc:dd:ee:ff }
#
# - En retirer :
# 	nft delete element firewall ip_mac { 10.69.6.91 . aa:bb:cc:dd:ee:ff }
#
# Le tout à la volée :)