diff options
| author | Phil Sutter <phil@nwl.cc> | 2020-10-27 17:33:15 +0100 |
|---|---|---|
| committer | Phil Sutter <phil@nwl.cc> | 2020-11-04 14:44:11 +0100 |
| commit | 25338cdb6c77aa2f0977afbbb612571c9d325213 (patch) | |
| tree | e18d5b58d9718ebb9ee21cb06f189eb94bf7a22c /tests/py/ip6/ip6.t.payload.inet | |
| parent | 8a927c56d83ed0f78785011bd92a53edc25a0ca0 (diff) | |
src: Optimize prefix matches on byte-boundaries
If a prefix expression's length is on a byte-boundary, it is sufficient
to just reduce the length passed to "cmp" expression. No need for
explicit bitwise modification of data on LHS. The relevant code is
already there, used for string prefix matches. There is one exception
though, namely zero-length prefixes: Kernel doesn't accept zero-length
"cmp" expressions, so keep them in the old code-path for now.
This patch depends upon the previous one to correctly parse odd-sized
payload matches but has to extend support for non-payload LHS as well.
In practice, this is needed for "ct" expressions as they allow matching
against IP address prefixes, too.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Diffstat (limited to 'tests/py/ip6/ip6.t.payload.inet')
| -rw-r--r-- | tests/py/ip6/ip6.t.payload.inet | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/tests/py/ip6/ip6.t.payload.inet b/tests/py/ip6/ip6.t.payload.inet index d015c8ef..ffc9b9f5 100644 --- a/tests/py/ip6/ip6.t.payload.inet +++ b/tests/py/ip6/ip6.t.payload.inet @@ -604,9 +604,8 @@ inet test-inet input inet test-inet input [ meta load nfproto => reg 1 ] [ cmp eq reg 1 0x0000000a ] - [ payload load 16b @ network header + 8 => reg 1 ] - [ bitwise reg 1 = (reg=1 & 0xffffffff 0xffffffff 0x00000000 0x00000000 ) ^ 0x00000000 0x00000000 0x00000000 0x00000000 ] - [ cmp eq reg 1 0x00000000 0x00000000 0x00000000 0x00000000 ] + [ payload load 8b @ network header + 8 => reg 1 ] + [ cmp eq reg 1 0x00000000 0x00000000 ] # ip6 saddr ::1 ip6 daddr ::2 inet test-inet input |