diff options
| author | Florian Westphal <fw@strlen.de> | 2016-04-15 15:09:39 +0200 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2016-04-19 15:23:20 +0200 |
| commit | e20eac092725c982387181f3df557877b02eb345 (patch) | |
| tree | bad4c5ba92918e470ea775692260fe772db5057e /tests/py/ip6/ip6.t | |
| parent | c30fc3d731b711847fce7910e95d1c217886cb09 (diff) | |
payload: only merge if adjacent and combined size fits into a register
add rule ip6 filter input ip6 saddr ::1/128 ip6 daddr ::1/128 fails,
we ask to compare a 32byte immediate which is not supported:
[ payload load 32b @ network header + 8 => reg 1 ]
[ cmp eq reg 1 0x00000000 0x00000000 0x00000000 0x01000000 0x00000000 0x00000000 0x00000000 0x02000000 ]
We would need to use two cmps in this case, i.e.:
[ payload load 32b @ network header + 8 => reg 1 ]
[ cmp eq reg 1 0x00000000 0x00000000 0x00000000 0x01000000 ]
[ cmp eq reg 2 0x00000000 0x00000000 0x00000000 0x02000000 ]
Seems however that this requires a bit more changes to how nft
handles register allocations, we'd also need to undo the constant merge.
Lets disable merging for now so that we generate
[ payload load 16b @ network header + 8 => reg 1 ]
[ cmp eq reg 1 0x00000000 0x00000000 0x00000000 0x01000000 ]
[ payload load 16b @ network header + 24 => reg 1 ]
[ cmp eq reg 1 0x00000000 0x00000000 0x00000000 0x02000000 ]
... if merge would bring us over the 128 bit register size.
Closes: http://bugzilla.netfilter.org/show_bug.cgi?id=1032
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'tests/py/ip6/ip6.t')
| -rw-r--r-- | tests/py/ip6/ip6.t | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/py/ip6/ip6.t b/tests/py/ip6/ip6.t index 96366721..2a1eee78 100644 --- a/tests/py/ip6/ip6.t +++ b/tests/py/ip6/ip6.t @@ -139,6 +139,7 @@ ip6 saddr 1234::;ok # v61 ({v610}|{v611}) # v60 (::) ip6 saddr ::/64;ok +ip6 saddr ::1 ip6 daddr ::2;ok - ip6 daddr != {::1234:1234:1234:1234:1234:1234:1234, 1234:1234::1234:1234:1234:1234:1234 };ok ip6 daddr != ::1234:1234:1234:1234:1234:1234:1234-1234:1234::1234:1234:1234:1234:1234;ok;ip6 daddr != 0:1234:1234:1234:1234:1234:1234:1234-1234:1234:0:1234:1234:1234:1234:1234 |