[dpdk-dev] [PATCH RFC V2 0/2] TCP flow classification using 4-tuple and flags
Sowmini Varadhan
sowmini05 at gmail.com
Mon Jan 13 19:05:28 CET 2020
V2 updates: checkpatch fixes, revert accidently spelling error
introduced in V1;
The problem space of TCP flow tracking and classification
based on TCP state requires the ability to classify TCP
flows on more packet properties than just the 4-tuple,
e.g., TCP flags. This patch-set investigates the set of
changes needed in the examples/flow_classify.c needed to
achieve this.
Patch 1 extends examples/flow_classify.c to allow constraints
on tcp flags. Patch 2 extends the ACL handling in
librte_flow_classify to include keys on the properties in
addition to the tcp 4-tuple.
Note that one particular part of this patch-set where feedback
is requested is in allocate_acl_ipv4_tcp_5tuple_rule():
we need to add a key for the 8 bit flags, but the multibit
trie lookup moves in steps of 4 bytes, so it took some hackery
to figure out what byte-ordering was expected, and there were
no documentation/examples to provide guidelines. Comments/suggestions
would be particularly helpful.
Sowmini Varadhan (2):
Hooks to allow the setting of filters on tcp flags
Allow the flow_classify example to add an ACL table for tcp.
examples/flow_classify/flow_classify.c | 121 +++++++++++++++---
examples/flow_classify/ipv4_rules_file.txt | 22 ++--
lib/librte_flow_classify/rte_flow_classify.c | 87 +++++++++++++
lib/librte_flow_classify/rte_flow_classify.h | 19 +++
.../rte_flow_classify_parse.c | 8 +-
5 files changed, 230 insertions(+), 27 deletions(-)
--
2.20.1
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