These masks are not used in nftables backend, but mangle extension checks arhln_mask value to make sure --h-length was given (which is implicitly the case). Fixes: 5aecb2d8bfdda ("arptables: pre-init hlen and ethertype") Signed-off-by: Phil Sutter <phil@xxxxxx> --- iptables/xtables-arp.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/iptables/xtables-arp.c b/iptables/xtables-arp.c index 57e717fa901a1..4b663775c5bee 100644 --- a/iptables/xtables-arp.c +++ b/iptables/xtables-arp.c @@ -910,8 +910,12 @@ int do_commandarp(struct nft_handle *h, int argc, char *argv[], char **table, { struct iptables_command_state cs = { .jumpto = "", - .arp.arp.arhln = 6, - .arp.arp.arhrd = htons(ARPHRD_ETHER), + .arp.arp = { + .arhln = 6, + .arhln_mask = 255, + .arhrd = htons(ARPHRD_ETHER), + .arhrd_mask = 65535, + }, }; int invert = 0; unsigned int nsaddrs = 0, ndaddrs = 0; -- 2.20.1