[pve-devel] [PATCH firewall] fix #2686: don't add arp-ip-src filter for dhcp

[Mira Limbeck]

When the IPFilter setting is enabled and the container has DHCP
configured on an interface no 'arp-ip-src' filter should be added for
this interface as we don't have an IP address.

Previously '--arp-ip-src dhcp' was passed to ebtables which led to an error.

Signed-off-by: Mira Limbeck <m.limbeck at proxmox.com>
---
 src/PVE/Firewall.pm | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/PVE/Firewall.pm b/src/PVE/Firewall.pm
index d22b15a..19f1400 100644
--- a/src/PVE/Firewall.pm
+++ b/src/PVE/Firewall.pm
@@ -3904,7 +3904,9 @@ sub compile_ebtables_filter {
 		    # ebtables changes this to a .0/MASK network but we just
 		    # want the address here, no network - see #2193
 		    $ip =~ s|/(\d+)$||;
-		    push @$arpfilter, $ip;
+		    if ($ip !~ m/^dhcp$/) {
+			push @$arpfilter, $ip;
+		    }
 		}
 		generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
 	    }
-- 
2.20.1