ebtables: fix -j CONTINUE handling for add/delete

-j CONTINUE can be added, but it can't be removed:
extensions/libebt_standard.t: ERROR: line 5 (cannot find: ebtables -I INPUT -d de:ad:be:ef:00:00 -j CONTINUE)

This problem stems from silly ambiguity in ebtables-nft vs. iptables.

In iptables, you can do
iptables -A INPUT
(no -j)
in ebtables, you can do either
ebtables -A INPUT
or
ebtables -A INPUT -j CONTINUE

both are *supposed* to be the same (and they do the same even
in ebtables-nft on netlink side).

However, the temprary binary representation within ebtables-nft is not
the same: when parsing -j CONTINUE, we add a standard target, then omit
it later in _add_target().

When translating netlink representation to ebt binary one,
we do not add a standard target and instead just print '-j CONTINUE'
when listing rules.

So when doing
-I INPUT -j CONTINUE
-D INPUT -j CONTINUE

the -D operation fails because it has a standard target in the binary
representation, whereas the rule we obtained from translating
nftables netlink back to ebtables' binary represenation doesn't.

Fix it by ignoring 'CONTINUE' on parser side.

Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/extensions/libebt_standard.t b/extensions/libebt_standard.t
index 59ca337a..04991e1f 100644
--- a/extensions/libebt_standard.t
+++ b/extensions/libebt_standard.t
@@ -2,5 +2,6 @@
 -s 0:0:0:0:0:0;=;OK
 -d 00:00:0:00:00:00;-d 0:0:0:0:0:0;OK
 -s de:ad:be:ef:0:00 -j RETURN;-s de:ad:be:ef:0:0 -j RETURN;OK
+-d de:ad:be:ef:00:00 -j CONTINUE;=;OK
 -d de:ad:be:ef:0:0;=;OK
 -d de:ad:be:ef:00:00/ff:ff:ff:ff:00:00 -j DROP;-d de:ad:be:ef:0:0/ff:ff:ff:ff:0:0 -j DROP;OK