Phil Sutter [Wed, 15 Nov 2023 16:41:50 +0000 (17:41 +0100)]
nft-bridge: nft_bridge_add() uses wrong flags
When checking whether -s or -d was given, invflags were used by
accident. This change has no functional effect since the values remain
the same, but this way it's clear where the previously assigned flags
are used.
Jan Engelhardt [Mon, 13 Nov 2023 10:17:35 +0000 (11:17 +0100)]
man: more backslash-encoding of characters
"-" is the dash, "\-" is minus as we know, but groff lists some more
characters: "^" is "modifier circumflex" and "~" is "modifier tilde",
which, too, need to be escaped for our use.
Phil Sutter [Wed, 8 Nov 2023 03:08:44 +0000 (04:08 +0100)]
arptables: Fix --proto-type mask formatting
Arptables accepts numeric --proto-type values and masks in any numeral
system identified by (absence of) prefix. Yet it prints the mask value
in hex without '0x'-prefix, breaking save and restore the same way
numeric --h-type output did.
In theory, this could be fixed either by adding the missing prefix or
printing the mask in decimal (like most other builtin matches do), but
since the value is printed in hex with prefix already, align mask output
with that.
Also a day 1 bug and consistent with legacy, so no Fixes: tag here as
well.
Signed-off-by: Phil Sutter <phil@nwl.cc> Acked-by: Florian Westphal <fw@strlen.de>
Phil Sutter [Wed, 8 Nov 2023 02:58:42 +0000 (03:58 +0100)]
arptables: Fix formatting of numeric --h-type output
Arptables expects numeric arguments to --h-type option in hexadecimal
form, even if no '0x'-prefix is present. In contrast, it prints such
values in decimal. This is not just inconsistent, but makes it
impossible to save and later restore a ruleset without fixing up the
values in between.
Assuming that the parser side can't be changed for compatibility
reasons, fix the output side instead.
This is a day 1 bug and present in legacy arptables as well, so treat
this as a "feature" of arptables-nft and omit a Fixes: tag.
Signed-off-by: Phil Sutter <phil@nwl.cc> Acked-by: Florian Westphal <fw@strlen.de>
Add test cases for libarpt_mangle and extend the generic
tests to cover basic arptables matches.
Note that there are several historic artefacts that could be revised.
For example, arptables-legacy and arptables-nft both ignore "-p"
instead of returning an error about an unsupported option.
The ptype could be hard-wired to 0x800 and set unconditionally.
OTOH, this should always match for ethernet arp packets anyway.
Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Tue, 7 Nov 2023 18:12:14 +0000 (19:12 +0100)]
ebtables: Fix corner-case noflush restore bug
Report came from firwalld, but this is actually rather hard to trigger.
Since a regular chain line prevents it, typical dump/restore use-cases
are unaffected.
Fixes: 73611d5582e72 ("ebtables-nft: add broute table emulation") Cc: Eric Garver <eric@garver.life> Signed-off-by: Phil Sutter <phil@nwl.cc>
ARPT_ and IPT_INV flags are not interchangeable, e.g.:
define IPT_INV_SRCDEVADDR 0x0080
define ARPT_INV_SRCDEVADDR 0x0010
as these flags can be tested by libarp_foo.so such checks can yield
incorrect results.
Because arptables-nft uses existing code, e.g. xt_mark, it makes
sense to unify this completely by converting the last users of
ARPT_INV_ constants.
Note that arptables-legacy does not do run-time module loading via
dlopen(). Functionaliy implemented by "extensions" in the
arptables-legacy git tree are built-in, so this doesn't break
arptables-legacy binaries.
Fixes: 44457c080590 ("xtables-arp: Don't use ARPT_INV_*") Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Phil Sutter <phil@nwl.cc>
Jan Engelhardt [Tue, 24 Oct 2023 13:04:03 +0000 (15:04 +0200)]
man: encode hyphens the way groff/man requires it
Edit a few spots where indeed a hyphens (U+2010) rather than U+002D is desired.
("set-name" is not something you input, it is a placeholder in the context of
documentation. "out-of-flow" is part of the regular flowed text, so should not
use anything but hyphens.)
Signed-off-by: Jan Engelhardt <jengelh@inai.de> Signed-off-by: Phil Sutter <phil@nwl.cc>
Jan Engelhardt [Tue, 24 Oct 2023 12:58:06 +0000 (14:58 +0200)]
man: encode minushyphen the way groff/man requires it
Sparked by a recent LWN article[1], sweeps over the iptables manpages
for incorrectly encoded dashes was made by Phil Sutter and myself.
An ASCII minushyphen in the source manpage translates to a hyphen in
output, so one has to use the sequence "\-" to get a minushyphen in
the output, as groff_char(7) explains.
[1] https://lwn.net/Articles/947941/ (paywalled until about 2023-11-06)
Signed-off-by: Jan Engelhardt <jengelh@inai.de> Signed-off-by: Phil Sutter <phil@nwl.cc>
Since kernel commit c4eee56e14fe ("net: skb_find_text: Ignore patterns
extending past 'to'"), pattern scanning no longer happens past --to
offset even if skb_seq_read() returned a larger block. Point this out in
the description and also drop the '-1' offset which is not true as
kernel's selftest in tools/testing/selftests/netfilter/xt_string.sh
shows.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1707 Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Thu, 12 Oct 2023 15:54:53 +0000 (17:54 +0200)]
extensions: string: Clarify description of --to
String match indeed returns a match as long as the given pattern starts
in the range of --from and --to, update the text accordingly.
Also add a note regarding fragment boundaries.
Phil Sutter [Thu, 12 Oct 2023 15:27:42 +0000 (17:27 +0200)]
libiptc: Fix for another segfault due to chain index NULL pointer
Chain rename code missed to adjust the num_chains value which is used to
calculate the number of chain index buckets to allocate during an index
rebuild. So with the right number of chains present, the last chain in a
middle bucket being renamed (and ending up in another bucket) triggers
an index rebuild based on false data. The resulting NULL pointer index
bucket then causes a segfault upon reinsertion.
Phil Sutter [Wed, 6 Sep 2023 17:02:52 +0000 (19:02 +0200)]
include: linux: Update kernel.h
Its contents were moved into const.h and sysinfo.h, apply these changes
to the cached copies. Fixes for the following warning when compiling
xtables-monitor.c with new kernel headers in /usr/include:
| In file included from ../include/linux/netfilter/x_tables.h:3,
| from ../include/xtables.h:19,
| from xtables-monitor.c:36:
| ../include/linux/kernel.h:7: warning: "__ALIGN_KERNEL" redefined
| 7 | #define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
| |
| In file included from /usr/include/linux/netlink.h:5,
| from /home/n0-1/git/libmnl/install/include/libmnl/libmnl.h:9,
| from xtables-monitor.c:30:
| /usr/include/linux/const.h:31: note: this is the location of the previous definition
| 31 | #define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1)
| |
Phil Sutter [Wed, 6 Sep 2023 14:32:47 +0000 (16:32 +0200)]
nft: Fix for useless meta expressions in rule
A relict of legacy iptables' mandatory matching on interfaces and IP
addresses is support for the '-i +' notation, basically a "match any
input interface". Trying to make things better than its predecessor,
iptables-nft boldly optimizes that nop away - not entirely though, the
meta expression loading the interface name was left in place. While not
a problem (apart from pointless overhead) in current HEAD, v1.8.7 would
trip over this as a following cmp expression (for another match) was
incorrectly linked to that stale meta expression, loading strange values
into the respective interface name field.
While being at it, merge and generalize the functions into a common one
for use with ebtables' NFT_META_BRI_(I|O)IFNAME matches, too.
Phil Sutter [Fri, 1 Sep 2023 11:16:56 +0000 (13:16 +0200)]
tests: shell: Fix for ineffective 0007-mid-restore-flush_0
The test did not catch non-zero exit status of the spawned coprocess. To
make it happen, Drop the line killing it (it will exit anyway) and pass
its PID to 'wait'.
While being at it, put the sleep into the correct spot (otherwise the
check for chain 'foo' existence fails as it runs too early) and make
said chain existence check effective.
Fixes: 4e3c11a6f5a94 ("nft: Fix for ruleset flush while restoring") Signed-off-by: Phil Sutter <phil@nwl.cc>
Quentin Armitage [Sat, 23 Nov 2013 08:41:58 +0000 (08:41 +0000)]
extensions: Fix checking of conntrack --ctproto 0
There are three issues in the code:
1) the check (sinfo->invflags & XT_INV_PROTO) is using the wrong mask
2) in conntrack_mt_parse it is testing (info->invert_flags &
XT_INV_PROTO) before the invert bit has been set.
3) the sense of the error message is the wrong way round
1) To get the error, ! -ctstatus XXX has to be specified, since
XT_INV_PROTO == XT_CONNTRACK_STATUS e.g.
| iptables -I CHAIN -m conntrack ! --ctstatus ASSURED --ctproto 0 ...
3) Unlike --proto 0 (where 0 means all protocols), in the conntrack
match --ctproto 0 appears to mean protocol 0, which can never be.
Therefore --ctproto 0 could never match and ! --ctproto 0 will always
match. Both of these should be rejected, since the user clearly
cannot be intending what was specified.
The attached patch resolves the issue, and also produces an error
message if --ctproto 0 is specified (as well as ! --ctproto 0 ), since
--ctproto 0 will never match, and ! --ctproto 0 will always match.
[Phil: - Added Fixes: tag - it's a day 1 bug
- Copied patch description from Bugzilla
- Reorganized changes to reduce diff
- Added test cases]
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=874 Fixes: 5054e85be3068 ("general conntrack match module userspace support files") Signed-off-by: Quentin Armitage <quentin@armitage.org.uk> Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Tue, 15 Aug 2023 11:47:28 +0000 (13:47 +0200)]
Revert --compat option related commits
This reverts the following commits:
b14c971db6db0 ("tests: Test compat mode") 11c464ed015b5 ("Add --compat option to *tables-nft and *-nft-restore commands") ca709b5784c98 ("nft: Introduce and use bool nft_handle::compat") 402b9b3c07c81 ("nft: Pass nft_handle to add_{target,action}()")
This implementation of a compatibility mode implements rules using
xtables extensions if possible and thus relies upon existence of those
in kernel space. Assuming no viable replacement for the internal
mechanics of this mode will be found in foreseeable future, it will
effectively block attempts at deprecating and removing of these xtables
extensions in favor of nftables expressions and thus hinder upstream's
future plans for iptables.
Phil Sutter [Fri, 5 May 2023 18:04:41 +0000 (20:04 +0200)]
Add --compat option to *tables-nft and *-nft-restore commands
The flag sets nft_handle::compat boolean, indicating a compatible rule
implementation is wanted. Users expecting their created rules to be
fetched from kernel by an older version of *tables-nft may use this to
avoid potential compatibility issues.
Changes since v1:
- Expect short option '-C' in {ip,ip6,eb}tables-nft-restore command line
parser
- Support -C/--compat in arptables-nft-restore, too
- Update man pages with the new flag
Phil Sutter [Fri, 5 May 2023 15:39:08 +0000 (17:39 +0200)]
nft: Introduce and use bool nft_handle::compat
If set, create rules using compat expressions where possible and disable
the bitwise expression avoidance introduced in 323259001d617 ("nft:
Optimize class-based IP prefix matches").
The change can't be right: A simple rule append call will reset all
built-in chains' counters. The old code works fine even given the
mentioned "empty restore" use-case, at least if counters don't change on
the fly in-kernel.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=912 Fixes: 7c4d668c9c2ee ("libiptc: fix wrong maptype of base chain counters on restore") Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Thu, 10 Aug 2023 09:30:59 +0000 (11:30 +0200)]
nft: Create builtin chains with counters enabled
The kernel enables policy counters for nftables chains only if
NFTA_CHAIN_COUNTERS attribute is present. For this to be generated, one
has to set NFTNL_CHAIN_PACKETS and NFTNL_CHAIN_BYTES attributes in the
allocated nftnl_chain object.
The above happened for base chains only with iptables-nft-restore if
called with --counters flag. Since this is very unintuitive to users,
fix the situation by adding counters to base chains in any case.
Fixes: 384958620abab ("use nf_tables and nf_tables compatibility interface") Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Tue, 31 Jan 2023 18:55:57 +0000 (19:55 +0100)]
nft-ruleparse: Introduce nft_create_target()
Like nft_create_match(), this is a small wrapper around the typical
target extension lookup and (standard) init code.
To use it from nft_parse_target() and nft_parse_log(), introduce an
inner variant which accepts the target payload size as parameter.
The call to rule_parse_ops::target callback was problematic with
standard target, because the callbacks initialized
iptables_command_state::jumpto with the target name, "standard" in that
case. Perform its tasks in nft_create_target(), keep it only for bridge
family's special handling of watcher "targets".
Jan Palus [Mon, 28 Dec 2020 09:59:42 +0000 (10:59 +0100)]
nft: move processing logic out of asserts
[Phil: Introduce assert_nft_restart() to keep things clean, also add
fallback returns to nft_action() and nft_prepare(), sanitizing
things at least a bit.]
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1487 Signed-off-by: Jan Palus <atler@pld-linux.org> Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Tue, 1 Aug 2023 23:55:08 +0000 (01:55 +0200)]
man: iptables-save.8: Clarify 'available tables'
This appears to be confusing. Since a missing table is also not flushed
("restored") when feeding the dump into iptables-restore, such a restore
call may be considered incomplete.
Phil Sutter [Tue, 1 Aug 2023 22:28:03 +0000 (00:28 +0200)]
man: iptables.8: Clarify --goto description
Text speaks about behaviour of RETURN target when used in chains
redirected to using --goto instead of --jump, not the difference between
--jump option and "return".
Fixes: 17fc163babc34 ("add 'goto' support (Henrik Nordstrom <hno@marasystems.com>)") Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Tue, 1 Aug 2023 22:05:45 +0000 (00:05 +0200)]
man: iptables.8: Trivial spelling fixes
- Missing "and" as well as full stop
- Missing comma in enumeration
- Duplicate "previous"
- Confusions are avoided rather than simplified
- Missing space after comma
Phil Sutter [Tue, 1 Aug 2023 19:24:15 +0000 (21:24 +0200)]
man: iptables.8: Extend exit code description
Codes 3 and 4 were missing.
Reported-by: Steven Barre <steven.barre@dxcas.com> Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1353 Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Tue, 1 Aug 2023 21:28:20 +0000 (23:28 +0200)]
extensions: libipt_icmp: Fix confusion between 255/255 and any
Per definition, ICMP type "any" is type 255 and the full range of codes
(0-255). Save callback though ignored the actual code values, printing
"any" for every type 255 match. This at least confuses users as they
can't find their rule added as '--icmp-type 255/255' anymore.
It is not entirely clear what the fixed commit was trying to establish,
but the save output is certainly not correct (especially since print
callback gets things right).
Phil Sutter [Tue, 1 Aug 2023 14:56:42 +0000 (16:56 +0200)]
iptables-apply: Eliminate shellcheck warnings
Actual warnings were only about use of '-a' in bracket expressions
(replace by '&&' pipeline) and the immediate evaluation of the variable
in trap command.
The remaining changes silence info-level messages: missing quoting
around variables, pointless '$' in arithmetic expressions, backticks
instead of $(...), missing '-r' parameter when calling read and an
awkward negated '-z' check.
Phil Sutter [Thu, 13 Jul 2023 16:32:02 +0000 (18:32 +0200)]
iptables-restore: Drop dead code
Handle initialization is guarded by 'in_table' boolean, so there can't
be a handle already (because the branch which unsets 'in_table' also
frees the handle).
Phil Sutter [Fri, 28 Jul 2023 11:58:46 +0000 (13:58 +0200)]
tests: shell: Fix and extend chain rename test
The old version exited unintentionally before testing ip6tables. Replace
it by a more complete variant testing for all tools, creating and
renaming of,chains with various illegal names instead of just renaming
to a clashing name.
Fixes: ed9cfe1b48526 ("tests: add initial save/restore test cases") Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Fri, 28 Jul 2023 11:50:11 +0000 (13:50 +0200)]
ebtables: Improve invalid chain name detection
Fix several issues:
- Most importantly, --new-chain command accepted any name. Introduce
ebt_assert_valid_chain_name() for use with both --new-chain and
--rename-chain.
- Restrict maximum name length to what legacy ebtables allows - this is
a bit more than iptables-nft, subject to be unified.
- Like iptables, legacy ebtables rejects names prefixed by '-' or '!'.
- Use xs_has_arg() for consistency, keep the check for extra args for
now.
Fixes: da871de2a6efb ("nft: bootstrap ebtables-compat") Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Fri, 21 Jul 2023 18:14:09 +0000 (20:14 +0200)]
*tables: Reject invalid chain names when renaming
While given chain name was sanity checked with --new-chain command,
--rename-chain command allowed to choose an invalid name. Keep things
consistent by adding the missing check.
Fixes: e6869a8f59d77 ("reorganized tree after kernel merge") Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Fri, 21 Jul 2023 17:40:30 +0000 (19:40 +0200)]
*tables-restore: Enforce correct counters syntax if present
If '--counters' option was not given, restore parsers would ignore
anything following the policy word. Make them more strict, rejecting
anything in that spot which does not look like counter values even if
not restoring counters.
Phil Sutter [Fri, 21 Jul 2023 11:14:36 +0000 (13:14 +0200)]
nft: Special casing for among match in compare_matches()
When other extensions may have "garbage" appended to their data which
should not be considered for match comparison, among match is the
opposite in that it extends its data beyond the value in 'size' field.
Add special casing to cover for this, avoiding false-positive rule
comparison.
Fixes: 26753888720d8 ("nft: bridge: Rudimental among extension support") Signed-off-by: Phil Sutter <phil@nwl.cc>
Some versions of awk (gawk-4.2.1-4.el8 in particular) also print the
non-debug ruleset listing's empty lines, causing the diff to fail. Catch
this by exiting upon seeing the first table heading. For the sake of
comparing bytecode, the actual ruleset listing is not interesting,
anyway.
Fixes: 0f7ea0390b336 ("tests/shell: Fix nft-only/0009-needless-bitwise_0") Signed-off-by: Phil Sutter <phil@nwl.cc>
nft-bridge: pass context structure to ops->add() to improve anonymous set support
Add context structure to improve bridge among support which creates an
anonymous set. This context structure specifies the command and it
allows to optionally store a anonymous set.
Use this context to generate native bytecode only if this is an
add/insert/replace command.
This fixes a dangling anonymous set that is created on rule removal.
Fixes: 26753888720d ("nft: bridge: Rudimental among extension support") Reported-and-tested-by: Igor Raits <igor@gooddata.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Jacek Tomasiak [Mon, 19 Jun 2023 11:46:36 +0000 (13:46 +0200)]
iptables: Fix handling of non-existent chains
Since 694612adf87 the "compatibility" check considers non-existent
chains as "incompatible". This broke some scripts which used calls
like `iptables -L CHAIN404` to test for chain existence and expect
"No chain/target/match by that name." in the output.
This patch changes the logic of `nft_is_table_compatible()` to
report non-existent chains as "compatible" which restores the old
behavior.
Fixes: 694612adf87 ("nft: Fix selective chain compatibility checks") Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1648 Signed-off-by: Jacek Tomasiak <jtomasiak@arista.com> Signed-off-by: Jacek Tomasiak <jacek.tomasiak@gmail.com> Signed-off-by: Phil Sutter <phil@nwl.cc>
This is an IPv4 header, which does not require the special handling
as in IPv6, use the payload matching instead of meta l4proto which
is slightly faster in this case.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Phil Sutter <phil@nwl.cc>
Jeremy Sowden [Sun, 11 Jun 2023 11:34:29 +0000 (12:34 +0100)]
man: string: document BM false negatives
For non-linear skb's there's a possibility that the kernel's Boyer-Moore
text-search implementation may miss matches. There's a warning about
this in the kernel source. Include that warning in the man-page.
nft: check for source and destination address in first place
When generating bytecode, check for source and destination address in
first place, then, check for the input and output device. In general,
the first expression in the rule is the most evaluated during the
evaluation process. These selectors are likely to show more variability
in rulesets.
# iptables-nft -vv -I INPUT -s 1.2.3.4 -p tcp
tcp opt -- in * out * 1.2.3.4 -> 0.0.0.0/0
table filter ip flags 0 use 0 handle 0
ip filter INPUT use 0 type filter hook input prio 0 policy accept packets 0 bytes 0
ip filter INPUT
[ payload load 4b @ network header + 12 => reg 1 ]
[ cmp eq reg 1 0x04030201 ]
[ meta load l4proto => reg 1 ]
[ cmp eq reg 1 0x00000006 ]
[ counter pkts 0 bytes 0 ]
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Phil Sutter <phil@nwl.cc>
Phil Sutter [Wed, 29 Mar 2023 15:53:11 +0000 (17:53 +0200)]
nft: Introduce nft-ruleparse.{c,h}
Extract all code dealing with parsing from struct nftnl_rule into struct
iptables_command_state from nft-shared.c into a separate source file.
Basically this is nft_rule_to_iptables_command_state() and the functions
it calls, plus family-independent parsers called from family-specific
callbacks.
Phil Sutter [Fri, 28 Apr 2023 12:41:08 +0000 (14:41 +0200)]
xshared: Fix parsing of option arguments in same word
When merging commandline parsers, a decision between 'argv[optind - 1]'
and 'optarg' had to be made in some spots. While the implementation of
check_inverse() required the former, use of the latter allows for the
common syntax of '--opt=arg' or even '-oarg' as 'optarg' will point at
the suffix while 'argv[optind - 1]' will just point at the following
option.
Fix the mess by making check_inverse() update optarg pointer if needed
so calling code may refer to and always correct 'optarg'.
Fixes: 0af80a91b0a98 ("nft: Merge xtables-arp-standalone.c into xtables-standalone.c") Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1677 Signed-off-by: Phil Sutter <phil@nwl.cc>
The function is deprecated. Eliminate the warning by use of
pcap_open_dead(), pcap_compile() and pcap_close() just how
pcap_compile_nopcap() is implemented internally in libpcap.
Phil Sutter [Wed, 5 Apr 2023 11:18:24 +0000 (13:18 +0200)]
tests: shell: Test for false-positive rule check
Rule comparison in legacy ip6tables was broken by commit eb2546a846776
("xshared: Share make_delete_mask() between ip{,6}tables"): A part of
the rules' data was masked out for comparison by accident.
Use new 'meta broute set 1' to emulate -t broute. If '-t broute' is given,
automatically translate -j DROP to 'meta broute set 1 accept' internally.
Reverse translation zaps the broute and pretends verdict was DROP.
Note that BROUTING is internally handled via PREROUTING, i.e. 'redirect'
and 'nat' targets are not available, they will need to be emulated via
nft expressions.
Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Phil Sutter <phil@nwl.cc>
Alyssa Ross [Sun, 2 Apr 2023 23:29:40 +0000 (23:29 +0000)]
build: use pkg-config for libpcap
If building statically, with libpcap built with libnl support, linking
will fail, as the compiler won't be able to find the libnl symbols
since static libraries don't contain dependency information. To fix
this, use pkg-config to find the flags for linking libpcap, since the
pkg-config files contain the neccesary dependency information.
autoconf will add code to the configure script for initializing
pkg-config the first time it seems PKG_CHECK_MODULES, so make the
libnfnetlink check the first one in the script, so the initialization
code is run unconditionally.
Signed-off-by: Alyssa Ross <hi@alyssa.is> Signed-off-by: Phil Sutter <phil@nwl.cc>
Markus Boehme [Mon, 3 Apr 2023 21:13:47 +0000 (23:13 +0200)]
ip6tables: Fix checking existence of rule
Pass the proper entry size when creating a match mask for checking the
existence of a rule. Failing to do so causes wrong results.
Reported-by: Jonathan Caicedo <jonathan@jcaicedo.com> Fixes: eb2546a846776 ("xshared: Share make_delete_mask() between ip{,6}tables") Signed-off-by: Markus Boehme <markubo@amazon.com> Signed-off-by: Phil Sutter <phil@nwl.cc>
In most distros 'python' means python2, which is not available anywhere.
This is a problem when, for example, building the Debian package. This
script is called as part of the build but 'python' is not available.
Mention python3 explictly. The script runs just fine in python3.
projects / thirdparty / iptables.git / log
