| Commit message (Collapse) | Author | Age | Files | Lines |
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mpz_get_str() (with NULL as first argument) will allocate a buffer using
the allocator functions (mp_set_memory_functions()). We should free
those buffers with the corresponding free function.
Add nft_gmp_free() for that and use it.
The name nft_gmp_free() is chosen because "mini-gmp.c" already has an
internal define called gmp_free(). There wouldn't be a direct conflict,
but using the same name is confusing. And maybe our own defines should
have a clear nft prefix.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The caller is supposed to free the allocated string. Return a non-const
string to make that clearer.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use the key from the evaluation context to perform the byteorder
conversion in case that this expression is used for lookups and updates
on explicit sets.
# nft --debug=netlink add rule ip6 t output ip6 dscp @mapv6
ip6 t output
[ payload load 2b @ network header + 0 => reg 1 ]
[ bitwise reg 1 = ( reg 1 & 0x0000c00f ) ^ 0x00000000 ]
[ byteorder reg 1 = ntoh(reg 1, 2, 2) ] <-------------- this was missing!
[ bitwise reg 1 = ( reg 1 >> 0x00000006 ) ]
[ lookup reg 1 set mapv6 ]
Also with set statements (updates from packet path):
# nft --debug=netlink add rule ip6 t output update @mapv6 { ip6 dscp }
ip6 t output
[ payload load 2b @ network header + 0 => reg 1 ]
[ bitwise reg 1 = ( reg 1 & 0x0000c00f ) ^ 0x00000000 ]
[ byteorder reg 1 = ntoh(reg 1, 2, 2) ] <------------- also here!
[ bitwise reg 1 = ( reg 1 >> 0x00000006 ) ]
[ dynset update reg_key 1 set mapv6 ]
Simple matches on values and implicit sets rely on the binary transfer
mechanism to propagate the shift to the constant, no explicit byteorder
is required in such case.
Fixes: 668c18f67203 ("evaluate: place byteorder conversion before rshift in payload statement")
Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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map expression (which is used a key to look up for the mapping) needs to
consider the statement length context, otherwise incorrect bytecode is
generated when {ct,meta} statement is generated.
# nft -f - <<EOF
add table ip6 t
add chain ip6 t c
add map ip6 t mapv6 { typeof ip6 dscp : meta mark; }
EOF
# nft -d netlink add rule ip6 t c meta mark set ip6 dscp map @mapv6
ip6 t c
[ payload load 2b @ network header + 0 => reg 1 ]
[ bitwise reg 1 = ( reg 1 & 0x0000c00f ) ^ 0x00000000 ]
... missing byteorder conversion here before shift ...
[ bitwise reg 1 = ( reg 1 >> 0x00000006 ) ]
[ lookup reg 1 set mapv6 dreg 1 ]
[ meta set mark with reg 1 ]
Reset statement length context only for the mapping side for the
elements in the set.
Fixes: edecd58755a8 ("evaluate: support shifts larger than the width of the left operand")
Reported-by: Brian Davidson <davidson.brian@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Brian Davidson says:
meta hour rules don't display properly after being created when the
hour is on or after 00:00 UTC. The netlink debug looks correct for
seconds past midnight UTC, but displaying the rules looks like an
overflow or a byte order problem. I am in UTC-0400, so today, 20:00
and later exhibits the problem, while 19:00 and earlier hours are
fine.
meta.c only ever worked when the delta to UTC is positive.
We need to add in case the second counter turns negative after
offset adjustment.
Also add a test case for this.
Fixes: f8f32deda31d ("meta: Introduce new conditions 'time', 'day' and 'hour'")
Reported-by: Brian Davidson <davidson.brian@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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It does not make much sense to omit printing the port expression if it's
not a value expression: On one hand, input allows for more advanced
uses. On the other, if it is in-kernel, best nft can do is to try and
print it no matter what. Just ignoring ruleset elements can't be
correct.
Fixes: 2be1d52644cf7 ("src: Add tproxy support")
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1721
Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Merge the Makefile.am under "doc/" into the toplevel Makefile.am. This
is a step in the effort of dropping recursive make.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Merge the Makefile.am under "examples/" into the toplevel Makefile.am.
This is a step in the effort of dropping recursive make.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Merge the Makefile.am under "src/" into the toplevel Makefile.am. This
is a step in the effort of dropping recursive make.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Merge the Makefile.am under "files/" into the toplevel Makefile.am. This
is a step in the effort of dropping recursive make.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Merge the Makefile.am under "py/" into the toplevel Makefile.am. This is
a step in the effort of dropping recursive make.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Switch from recursive-make to a single top-level Makefile. This is the
first step, the following patches will continue this.
Unlike meson's subdir() or C's #include, automake's SUBDIRS= does not
include a Makefile. Instead, it calls `make -C $dir`.
https://www.gnu.org/software/make/manual/html_node/Recursion.html
https://www.gnu.org/software/automake/manual/html_node/Subdirectories.html
See also, "Recursive Make Considered Harmful".
https://accu.org/journals/overload/14/71/miller_2004/
This has several problems, which we an avoid with a single Makefile:
- recursive-make is harder to maintain and understand as a whole.
Recursive-make makes sense, when there are truly independent
sub-projects. Which is not the case here. The project needs to be
considered as a whole and not one directory at a time. When
we add unit tests (which we should), those would reside in separate
directories but have dependencies between directories. With a single
Makefile, we see all at once. The build setup has an inherent complexity,
and that complexity is not necessarily reduced by splitting it into more files.
On the contrary it helps to have it all in once place, provided that it's
sensibly structured, named and organized.
- typing `make` prints irrelevant "Entering directory" messages. So much
so, that at the end of the build, the terminal is filled with such
messages and we have to scroll to see what even happened.
- with recursive-make, during build we see:
make[3]: Entering directory '.../nftables/src'
CC meta.lo
meta.c:13:2: error: #warning hello test [-Werror=cpp]
13 | #warning hello test
| ^~~~~~~
With a single Makefile we get
CC src/meta.lo
src/meta.c:13:2: error: #warning hello test [-Werror=cpp]
13 | #warning hello test
| ^~~~~~~
This shows the full filename -- assuming that the developer works from
the top level directory. The full name is useful, for example to
copy+paste into the terminal.
- single Makefile is also faster:
$ make && perf stat -r 200 -B make -j
I measure 35msec vs. 80msec.
- recursive-make limits parallel make. You have to craft the SUBDIRS= in
the correct order. The dependencies between directories are limited,
as make only sees "LDADD = $(top_builddir)/src/libnftables.la" and
not the deeper dependencies for the library.
- I presume, some people like recursive-make because of `make -C $subdir`
to only rebuild one directory. Rebuilding the entire tree is already very
fast, so this feature seems not relevant. Also, as dependency handling
is limited, we might wrongly not rebuild a target. For example,
make check
touch src/meta.c
make -C examples check
does not rebuild "examples/nft-json-file".
What we now can do with single Makefile (and better than before), is
`make examples/nft-json-file`, which works as desired and rebuilds all
dependencies.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Those will be generated by automake, once the recursive Makefiles
are gone.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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With Fedora 39 (util-linux-core-2.39.2-1.fc39), the mount command starts
to fail. It was still working with Fedora 38 (util-linux-core-2.38.1-4.fc38).
$ unshare -f -p -m --mount-proc -U --map-root-user -n bash -c 'mount -t tmpfs --make-private /var/run && mount'
mount: /run: mount failed: Invalid argument.
Not sure why this starts to fail. But arguably the command line
arguments were wrong. Fix it, we need a pseudo name for the device.
Fixes: df6f1a3e0803 ("tests/shell: bind mount private /var/run/netns in test container")
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Consider the following ruleset.
define ext_if = { "eth0", "eth1" }
table ip filter {
chain c {
iifname . tcp dport { $ext_if . 22 } accept
}
}
Attempting to load this ruleset results in:
BUG: invalid expression type 'set' in setnft: netlink.c:304: __netlink_gen_concat_key: Assertion `0' failed.
Aborted (core dumped)
After this patch:
# nft -f ruleset.nft
ruleset.nft:1:17-40: Error: cannot use set in concatenation
define ext_if = { "eth0", "eth1" }
^^^^^^^^^^^^^^^^^^
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1715
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Almost all shell tests use /bin/bash already.
In some cases we've had shell tests use /bin/sh, but still having
a bashism. This causes failures on systems where sh is dash or another,
strict bourne shell.
Flag those via check-tree.sh.
Signed-off-by: Florian Westphal <fw@strlen.de>
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So running this test with /bin/sh != /bin/bash works.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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IFNAMSIZ is 16, and the allowed byte length of the name is one less than
that. Fix the length check and adjust a test for covering the longest
allowed interface name.
This is obviously a change in behavior, because previously interface
names with length 16 were accepted and were silently truncated along the
way. Now they are rejected as invalid.
Fixes: fa52bc225806 ("parser: reject zero-length interface names")
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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IFNAMSIZ is 16. Adjust "0042chain_variable_0" to use an interface name
with the maximum allowed bytes length.
Instead of adding an entirely different test, adjust an existing one to
use another interface name. The aspect for testing for a long interface
name is not special enough, to warrant a separate test. We can cover it
by extending an existing test.
Note that the length check in "parser_bison.y" is wrong. The test checks
still for the wrong behavior and that "d23456789012345x" is accepted.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This is copied from "bogons/nft-f/zero_length_devicename_assert" and
adjusted.
- `device""lo"` looks odd. In this file use `device ""` to only check
against empty strings, without oddity.
- "ip" type has no hook ingress in filter. If the device name would be
valid, the file would still be rejected. Use "netdev".
The purpose is to add a test for a file that would otherwise pass,
except having an empty device name. Without oddities.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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"check-tree.sh" does consistency checks on the source tree. Extend
the check to flag more unexpected files. We don't want to accidentally
have left over files.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The file "optimizations/dumps/single_anon_set.nft.input" was laying
around, and it was unclear how it was used.
Let's extend "check-patch.sh" to flag all unused files. But the script
cannot understand how "single_anon_set.nft.input" is used (aside allow
listing it).
Instead, inline the script to keep it inside the test (script).
We still write the data to a separate file and don't use `nft -f -`
(because reading stdin uses a different code path we want to cover).
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The comment length is limited to NFTNL_UDATA_COMMENT_MAXLEN. Test for
that.
Adjust an existing test for that.
Also rename $EXPECTED to $RULESET. We don't compare the value of
$EXPECTED against the actually configured rules. It also wouldn't work,
because the input is not normalized and wouldn't match. It also isn't
necessary, because there is a .nft dump file.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This is an inconsistency. The test should have either a .nft or a
.nodump file. "./tools/check-tree.sh" enforces that and will in the
future run by `make check`.
Fixes: 22fab8681a50 ("parser_bison: Fix for broken compatibility with older dumps")
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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It can be cumbersome to debug why a test fails. Our tests are just shell
scripts, which for the most part don't print much. That is good, but for
debugging, it can be useful to run the test via `bash -x`. Previously,
we would just patch the source file while debugging.
Add an option "-x" and NFT_TEST_VERBOSE_TEST=y environment variable. If set,
"test-wrapper.sh" will check whether the shebang is "#!/bin/bash" and add
"-x" to the command line.
While at it, let test-wrapper.sh also log a line like
Command: $CMD
With this, we see in the log the command that was run, and how
NFT_TEST_VERBOSE_TEST may have affected it. This is anyway useful,
because many tests don't print anything at all, and we end up with an
empty "testout.log". Empty files are cumbersome, e.g. I like to use
`grep -R ^` to show the content of all files, which does not show empty
files. Ensuring that something is always written is desirable.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Commit e6d1d0d611958 ("src: add set element multi-statement
support") changed the order of expressions and other state attached to set
elements are expected in input. This broke parsing of ruleset dumps
created by nft commands prior to that commit.
Restore compatibility by also accepting the old ordering.
Fixes: e6d1d0d611958 ("src: add set element multi-statement support")
Signed-off-by: Phil Sutter <phil@nwl.cc>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Otherwise too long string overruns the log prefix buffer.
Fixes: e76bb3794018 ("src: allow for variables in the log prefix string")
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1714
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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All tests under "tests/shell" are shell scripts with shebang /bin/bash
or /bin/sh. This may seem expected, since these tests are under
"tests/shell" directory, but any executable file would work.
Anyway. The vast majority of the tests has "#!/bin/bash" as shebang.
A few tests had "#!/bin/sh" or "#!/bin/sh -e". Unify this and always use bash.
Since we anyway require bash, this is not a limitation.
Also, if we know that this is a bash script (by parsing the shebang), we
can let the test wrapper pass "-x" to the script. The next commit will
do that, and it is nicer if the shebangs are all uniform.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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This is an inconsistency. The test should have either a .nft or a
.nodump file. "./tools/check-tree.sh" enforces that and will in the
future run by `make check`.
Fixes: 74cf3d16d8e9 ('tests: shell: add vlan match test case')
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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when I run sudo nft insert rule filter FORWARD iifname "ens2f1" ip saddr not @ip_macs counter drop comment \" BLOCK ALL NON REGISTERED IP/MACS \"
I get: Error: negation can only be used with singleton bitmask values
And even I did not spot the problem immediately.
I don't think "not" should have been added, its easily confused with
"not equal"/"neq"/!= and hides that this is allegedly a binop.
At least *mention* that the commandline is asking for a binary
operation here and suggest "!=".
Signed-off-by: Florian Westphal <fw@strlen.de>
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Most tests can run just fine without root. A few of them will fail if
/proc/sys/net/core/{wmem_max,rmem_max} is too small (as it is by default
on the host).
The easy workaround is to bump those limits once. This has to be
repeated after each reboot.
Doing that manually (every time) is cumbersome. Add a "--setup-host"
option for that.
Usage:
$ sudo ./tests/shell/run-tests.sh -S
Setting up host for running as rootless (requires root).
echo 4096000 > /proc/sys/net/core/rmem_max (previous value 100000)
echo 4096000 > /proc/sys/net/core/wmem_max (previous value 100000)
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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On a successful run, the result directory will be deleted (unless run
with "-k|--keep-logs" option or NFT_TEST_KEEP_LOGS=y).
With NFT_TEST_FAIL_ON_SKIP=y, when there are no failures but skipped
tests, also preserve the result.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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After reboot, "/var/run/netns" does not exist before we run the first
`ip netns add` command. Previously, "test-wrapper.sh" would mount a
tmpfs on that directory, but that fails, if the directory doesn't exist.
You will notice this, by deleting /var/run/netns (which only root can
delete or create, and which is wiped on reboot).
Instead, mount all of "/var/run". Then we can also create /var/run/netns
directory.
This means, any other content from /var/run is hidden too. That's
probably desirable, because it means we don't depend on stuff that
happens to be there. If we would require other content in /var/run, then
the test runner needs to be aware of the requirement and ensure it's
present. But best is just to not require anything. It's only iproute2
which insists on /var/run/netns.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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After Linux kernel's patch ("netfilter: nf_tables: do not refresh
timeout when resetting element") timers are not reset anymore, update
documentation to keep this in sync.
Fixes: 83e0f4402fb7 ("Implement 'reset {set,map,element}' commands")
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Check that we can match on the 8021ad header and vlan tag, see
af84f9e447a6 ("netfilter: nft_payload: rebuild vlan header on h_proto access").
Signed-off-by: Florian Westphal <fw@strlen.de>
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Disallow enabling/disabling a table in a single transaction.
Make sure we still allow one update, either to dormant, or
from active to dormant.
Reported-by: "Lee, Cherie-Anne" <cherie.lee@starlabs.sg>
Cc: Bing-Jhong Billy Jheng <billy@starlabs.sg>
Cc: info@starlabs.sg
Signed-off-by: Florian Westphal <fw@strlen.de>
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It was currently not possible to match the target address of a neighbor
solicitation or neighbor advertisement against a dynamic set, unlike in
IPv4.
Since they are many ICMPv6 messages with an address at the same offset,
allow filtering on the target address for all icmp types that have one.
While at it, also allow matching the destination address of an ICMPv6
redirect.
Signed-off-by: Nicolas Cavallari <nicolas.cavallari@green-communications.fr>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Turns out I also love to forget about nft-test.py -j.
Fixes: 99ab1b8feb16 ("rule: never merge across non-expression statements")
Signed-off-by: Florian Westphal <fw@strlen.de>
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The function print_times() skips any time elements which are zero, so
output may lack the ms part. Adjust the sed call dropping anything but
the minutes value to not fail in that case.
Reported-by: Pablo Neira Ayuso <pablo@netfilter.org>
Fixes: 255ec36a11525 ("tests: shell: Stabilize sets/reset_command_0 test")
Signed-off-by: Phil Sutter <phil@nwl.cc>
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Similar to previous change, also check all
include "foo"
and reject those if they refer to named fifos, block devices etc.
Directories are still skipped, I don't think we can change this
anymore.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1664
Signed-off-by: Florian Westphal <fw@strlen.de>
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Don't start e.g. parsing a block device.
nftables is typically run as privileged user, exit early if we
get unexpected input.
Only exception: Allow character device if input is /dev/stdin.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1664
Signed-off-by: Florian Westphal <fw@strlen.de>
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Forgot to 'git add' inet/bridge/netdev payload records.
Fixes: 99ab1b8feb16 ("rule: never merge across non-expression statements")
Signed-off-by: Florian Westphal <fw@strlen.de>
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The existing logic can merge across non-expression statements,
if there is only one payload expression.
Example:
ether saddr 00:11:22:33:44:55 counter ether type 8021q
is turned into
counter ether saddr 00:11:22:33:44:55 ether type 8021q
which isn't the same thing.
Fix this up and add test cases for adjacent vlan and ip header
fields. 'Counter' serves as a non-merge fence.
Signed-off-by: Florian Westphal <fw@strlen.de>
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For whatever reason, my system lacks an entry for 'sip' in
/etc/services. Assuming the service name is not relevant to the test,
just replace it by the respective port number.
Fixes: 68728014435d9 ("tests: shell: add sample ruleset reproducer")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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The returned memory will be initialized. No need to zero it first. Use
xmalloc() instead of xzalloc().
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add map statement stub to restore compilation without json support.
Fixes: 27a2da23d508 ("netlink_linearize: skip set element expression in map statement key")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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<string.h> provides strcmp(), as such it's very basic and used
everywhere.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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A number of changes to fix spurious errors:
- Add seconds as expiration, otherwise 14m59 reports 14m in minute
granularity, this ensures suficient time in a very slow environment with
debugging instrumentation.
- Provide expected output.
- Update sed regular expression to make 'ms' optional and use -E mode.
Fixes: adf38fd84257 ("tests: shell: use minutes granularity in sets/0036add_set_element_expiration_0")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If we have a plain EXPR_VALUE value, there is no need to copy
it via mpz_set().
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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