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| author |   Dave Barach <dave@barachs.net> | 2018-05-26 10:48:55 -0400 |
|---|---|---|
| committer |   Ole Trøan <otroan@employees.org> | 2018-05-27 04:39:56 +0000 |
| commit | 525c9d0f8645ef9901316f042c195adc970b4546 (patch) | |
| tree | 88486d59b7c9ec37bae5e8434dbd7508a1e3c92e /test/test_classifier.py | |
| parent | fc23f12c252a9843aeeb8dae7bf60264908f084d (diff) | |
VPP-1294: add missing feature arc constraint
the ip4-dhcp-client-detect feature MUST run prior to nat44-out2in, or
inbound dhcp broadcast packets will be dropped. Certain dhcp servers
answer lease renewal dhcp-request packets with broadcast dhcp-acks, leading
to unrecoverable lease loss.
In detail, this constraint:
VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
.arc_name = "ip4-unicast",
.node_name = "nat44-out2in",
.runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa"),
};
doesn't get the job done:
ip4-unicast:
[17] nat44-out2in
[23] ip4-dhcp-client-detect
[26] ip4-not-enabled
Add a proper constraint:
VNET_FEATURE_INIT (ip4_snat_out2in, static) = {
.arc_name = "ip4-unicast",
.node_name = "nat44-out2in",
.runs_after = VNET_FEATURES ("acl-plugin-in-ip4-fa",
"ip4-dhcp-client-detect"),
};
and the interface feature order is OK, at least in this regard:
ip4-unicast:
[17] ip4-dhcp-client-detect
[18] nat44-out2in
[26] ip4-not-enabled
We need to carefully audit (especially) the ip4-unicast feature arc,
which has [gasp] 37 features on it!
Change-Id: I5e749ead7ab2a25d80839a331de6261e112977ad
Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'test/test_classifier.py')
0 files changed, 0 insertions, 0 deletions