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batman-adv: set the isolation mark in the skb if needed

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If a broadcast packet is coming from a client marked as
isolated, then mark the skb using the isolation mark so
that netfilter (or any other application) can recognise
them.

The mark is written in the skb based on the mask value:
only bits set in the mask are substitued by those in the
mark value

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
This commit is contained in:
Antonio Quartulli
2013-11-16 12:03:52 +01:00
committed by Antonio Quartulli
parent eceb22ae0b
commit 42cb0bef01
3 changed files with 44 additions and 2 deletions
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18
net/batman-adv/soft-interface.c
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@@ -399,9 +399,23 @@ void batadv_interface_rx(struct net_device *soft_iface,
batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
ethhdr->h_source, vid);
if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source, ethhdr->h_dest,
vid))
if (is_multicast_ether_addr(ethhdr->h_dest)) {
/* set the mark on broadcast packets if AP isolation is ON and
* the packet is coming from an "isolated" client
*/
if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
vid)) {
/* save bits in skb->mark not covered by the mask and
* apply the mark on the rest
*/
skb->mark &= ~bat_priv->isolation_mark_mask;
skb->mark |= bat_priv->isolation_mark;
}
} else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
ethhdr->h_dest, vid)) {
goto dropped;
}
netif_rx(skb);
goto out;