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Commit 6979625686ec ("relational: Eliminate meta OPs") introduced some
bugs when printing bitmask types.
First, during the post-processing phase of delinearization, the
expression for "tcp flags syn" (PAYLOAD & flag != 0) gets converted to
PAYLOAD == flag, which is not equivalent. This should be
PAYLOAD (IMPL) flag.
Then, during output, the "==" sign from "tcp flags == syn" is dropped,
because the bitmask condition in must_print_eq_op() was removed. Let's
restore it, so that "tcp flags == syn" doesn't get printed as
"tcp flags syn". An extra check for value types is added, so that we
don't start printing "==" for sets such as "tcp flags {syn,ack}"
Finally, add a regression test for this particular case.
Fixes: 6979625686ec ("relational: Eliminate meta OPs")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
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This adds a simple nftables Python class in py/nftables.py which gives
access to libnftables API via ctypes module.
nft-test.py is extended to make use of the above class instead of
calling nft binary. Since command line formatting had to be touched
anyway, this patch also streamlines things a bit by introducing
__str__ methods to classes Table and Chain and making extensive use of
format strings instead of onerously adding all string parts together.
Since the called commands don't see a shell anymore, all shell meta
character escaping done in testcases is removed.
The visible effects of this change are:
* Four new warnings in ip/flowtable.t due to changing objref IDs (will
be addressed later in a patch to libnftnl).
* Reported command line in warning and error messages changed slightly
for obvious reasons.
* Reduction of a full test run's runtime by a factor of four. Status
diff after running with 'time':
< 83 test files, 77 files passed, 1724 unit tests, 0 error, 33 warning
< 87.23user 696.13system 15:11.82elapsed 85%CPU (0avgtext+0avgdata 9604maxresident)k
< 8inputs+36800outputs (0major+35171235minor)pagefaults 0swaps
> 83 test files, 77 files passed, 1724 unit tests, 4 error, 33 warning
> 6.80user 30.18system 3:45.86elapsed 16%CPU (0avgtext+0avgdata 14064maxresident)k
> 0inputs+35808outputs (0major+2874minor)pagefaults 0swaps
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We can delete some of the payload files now as ip/ip6/inet produce
same implicit meta l4proto dep.
Signed-off-by: Florian Westphal <fw@strlen.de>
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