| Commit message (Collapse) | Author | Age | Files | Lines |
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Legacy tool name is 'brctl' and so the 'br' prefix is already known. If
we use ibrname and obrname it looks consistent with iifname and oifname.
So let's this instead of ibridgename and obridgename since Florian likes
this too.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Fixes: 3baa28f24b3d ("src: rename ibrportname, obrportname")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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David reported nft chokes on this:
nft -f /tmp/A
/tmp/A:9:22-45: Error: datatype mismatch, expected concatenation of (IPv4 address, internet network service, IPv4 address), expression has type concatenation of (IPv4 address, internet network service)
cat /tmp/A
flush ruleset;
table ip filter {
set setA {
type ipv4_addr . inet_service . ipv4_addr
flags timeout
}
set setB {
type ipv4_addr . inet_service
flags timeout
}
}
Problem is we leak set definition details of setA to setB via eval
context, so reset this.
Also add test case for this.
Reported-by: David Fabian <david.fabian@bosson.cz>
Signed-off-by: Florian Westphal <fw@strlen.de>
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For bridge, iifname is the port name, whereas 'ibrport' is the
logical name of the bridge ("br0") the port ("iifname") is enslaved to.
So, 'ibrport' is a misnomer.
libnftl calls these 'bri_iifname' and 'bri_oifname', which is good
but using 'briiifname' in nft is rather ugly, so use 'ibridgename'
and 'obridgename' instead.
Old names are still recognized, listing shows the new names.
Signed-off-by: Florian Westphal <fw@strlen.de>
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without it, you get:
nft list ct helpers table filter
Error: syntax error, unexpected string, expecting helper or helpers
Fixes: 14fd3ad720f6e ("src: prepare for future ct timeout policy support")
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signature of parser_init() got quite huge, so simply pass the whole
context pointer to it - most of the parameters are just taken from there
anyway.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Parser basically turns input into a list of commands and error messages.
Having the commands list being part of struct parser_state does not make
sense from this point of view, also it will have to go away with
upcoming JSON support anyway.
While being at it, change nft_netlink() to take just the list of
commands instead of the whole parser state as parameter, also take care
of command freeing in nft_run_cmd_from_* functions (where the list
resides as auto-variable) instead of from inside nft_run().
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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* Move entries belonging to src/ into src/.gitignore.
* Drop lines for files inside build-aux/ since that is ignored already.
* No need to ignore src/Makefile.in, the entry 'Makefile.in' catches
that already.
* Remove entry for '.*.d', (recent?) autotools doesn't create any
matching files.
* Drop entries for non-existent parser.c and parser.h files.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Unclosed interval check at end of interval_map_decompose() missed to
check whether interval start is the last possible element in given set
before creating a range expression. This led to the last element
incorrectly printed as range from itself to itself. Fix this by
comparing the upper boundary against the lower one.
In order to keep indenting level low, invert the entry check and jump to
the end if it matches.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In parser_bison.y, call payload_init_raw() instead of assigning all
fields manually. Also drop manual initialization of flags field: it is
not touched in allocation path, so no need for that.
In stmt_evaluate_payload(), setting dtype field is redundant since
payload_init_raw() does that already.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This fixes memory leaks in three places:
* set_overlap():
The allocated intervals have to be freed again before returning to
caller. While being at it, reduce indenting level in said function to
stay below 80 columns boundary.
* range_is_prefix():
* interval_map_decompose():
GMP documentation suggests to call mpz_clear() for all mpz_t type
variables once they are not used anymore to free the space they occupy.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This fixes a memory leak identified by valgrind.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Like nft_run_cmd_from_buffer, nft_run_cmd_from_filename doesn't need to
change output_fp temporarily when printing error records anymore.
Fixes: 4176e24e14f07 ("libnftables: Introduce nft_ctx_set_error()")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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A new requirement to erec for the upcoming JSON support is printing
records with file input descriptors without open stream. The approach is
to treat 'name' field as file name, open it, extract the offending line
and close it again.
Further changes to libnftables input parsing routines though have shown
that the whole concept of file pointer reuse in erec is tedious and not
worth keeping:
* Closed files are to be supported as well, so there needs to be
fallback code for opening the file anyway.
* When input descriptor is duplicated from parser state into an error
record, the file pointer is copied as well. Therefore care has to be
taken to not free the parser state before any error records have been
printed. This is the only point where old and duplicated input
descriptors are connected.
Therefore drop struct input_descriptor's 'fp' field and just always open
the file by name. This way also the old stream offset doesn't have to be
restored after reading.
While being at it, this patch fixes two other (potential) problems:
* If the offending line from input contains tabs, add them at the right
position in the marker buffer as well to avoid misalignment.
* The input file may not be seekable (/dev/stdin for instance), so skip
printing of offending line and markers if it couldn't be read
properly.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This spot was missed by commit 2b3f18e0cf7a7 ("libnftables: Fix for
input without trailing newline") - since line termination is now added
in nft_run_cmd_from_buffer(), cli is relieved from doing so.
Fixes: 2b3f18e0cf7a7 ("libnftables: Fix for input without trailing newline")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This increases the size of struct output_ctx quite a bit, but allows to
simplify internal functions dealing with the cookies mainly because
output_fp becomes accessible from struct cookie.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When integrating libnftables into Python code using ctypes module,
having to use a FILE pointer for output becomes a show-stopper.
Therefore make Python hackers' lives (a little) less painful by
providing convenience functions to setup buffering output and error
streams using fopencookie() and retrieving the buffers.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Analogous to nft_ctx_set_output(), this allows to set a custom file
pointer for writing error messages to.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Input parser implementation requires a newline at end of input,
otherwise the last pattern may not be recognized correctly.
If input comes from a file, the culprit was YY_INPUT macro not expecting
the last line not ending with a newline, so the last word wasn't
accepted. This is easily fixed by checking for feof(yyin) in there. A
simple test case for that is:
| echo -en "table ip t {\nchain c {\n}\n}" >/tmp/foo
| nft -f /tmp/foo
Input from a string buffer is a bit more tricky: The culprit here is
that detection of classid pattern is done by checking the character
following it which makes it impossible to sit right at end of input and
I haven't found an alternative to that. After dropping the manual
newline appending when combining argv into a single buffer in main(),
a rule like this won't be recognized anymore:
| nft add rule ip t c meta priority feed:babe
Since a direct call to run_cmd_from_buffer() via libnftables bypasses
the sanitizing done in main() entirely, it has to happen in libnftables
instead which means creating a newline-terminated duplicate of the input
buffer.
Note that main() created a buffer one byte longer than needed since it
accounts for whitespace at end of each argv but doesn't add it to the
buffer for the last one, so buffer length is reduced by two bytes
instead of just one although only one less character is printed into it.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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We can now call the helper again, with set->init as new RHS expression.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Needed by followup patch. EXPR_SET_REF handling is bonkers, it
"works" when using { key : value } because ->key and ->left are aliased
in struct expr to the same location.
Signed-off-by: Florian Westphal <fw@strlen.de>
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to reuse this in a followup patch.
Signed-off-by: Florian Westphal <fw@strlen.de>
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... to reuse this in a followup patch.
Signed-off-by: Florian Westphal <fw@strlen.de>
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If the length is less than 1 byte, this codepath hits a floating point
exception, use div_round_up() as everywhere else in the code.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The right shift transfer may be result in adjusting the set key size,
eg. ip6 dscp results in fetching 6 bits that are splitted between two
bytes, hence the set element ends up being 16 bytes long.
Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This is only required by sets, maps and meters, skip cache.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Instead of a snapshot from the gmp hg repository.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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ip protocol 6 redirect to :tcp dport map { 22 : 8000, 80 : 8080}
is printed as
redirect to :tcp dport map { 22 : 8000, 80 : 8080}
but that input yields:
Error: transport protocol mapping is only valid after transport protocol match
so kill dependencies beforehand so nft won't remove it.
Signed-off-by: Florian Westphal <fw@strlen.de>
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old:
add @set5{ ip6 saddr . ip6 daddr}
new:
add @set5 { ip6 saddr . ip6 daddr}
Signed-off-by: Florian Westphal <fw@strlen.de>
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updates from latest stable release of libgmp to get in sync with them
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This reverts commit 126706c23c0458b07d54550dc27561b30f8a43f2.
As its now ok to use icmp-in-ip6 family we can remove the dependency.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Jozsef points out that
meta l4proto icmp icmp type destination-unreachable
is hard to read. So, lets just add icmp/icmpv6 to
ip/ip6 protocol base so users can just go with
icmp type destination-unreachable
and let nft fill in needed dependency.
After this patch, the recent patch to not remove the
dependency can be reverted again.
Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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When using nftables to filter icmp-in-ipv6 or icmpv6-in-ipv4 we
erronously removed the dependency, i.e. "lis ruleset" shows
table ip6 filter { chain output {
type filter hook output priority 0; policy accept;
icmp type destination-unreachable
} }
but that won't restore because of ip vs ipv6 conflict.
After this patch, this lists as
meta l4proto icmp icmp type destination-unreachable
instead. We still remove the dependency in "ip" family.
Same applies to icmpv6-in-ip.
Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Phil reported following assert:
add rule ip6 f o mark set ip6 saddr . ip6 daddr . tcp dport \
map { dead::beef . f00::. 22 : 1 }
nft: netlink_linearize.c:655: netlink_gen_expr: Assertion `dreg < ctx->reg_low' failed.
This happens because "mark set" will allocate one register (the dreg),
but netlink_gen_concat_expr will populate a lot more register space if
the concat expression strings a lot of expressions together.
As the assert is useful pseudo-reserve the register space as per
concat->len and undo after generating the expressions.
Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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This reverts commits d572d59788143945c2a638f12a5227d9b21ce489 and
9f5e49e147219cd161de8cd80cadf8a444969ef0.
Current libnftables API should be stable enough to release it into the
public, and after 4aba100e593f ("rule: reset cache iff there is an
existing cache") we have a simple way to batch commands through this
API.
Suggested-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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It was surprisingly easy to crash nft with invalid syntax in 'add
flowtable' command. Catch at least three possible ways (illustrated in
provided test case) by making evaluation phase survive so that bison
gets a chance to complain.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In libnftables, detect if given filename is '-' and treat it as the
common way of requesting to read from stdin, then open /dev/stdin
instead. (Calling 'nft -f /dev/stdin' worked before as well, but this
makes it official.)
With this in place and bash's support for here strings, review all tests
in tests/shell for needless use of temp files. Note that two categories
of test cases were intentionally left unchanged:
- Tests creating potentially large rulesets to avoid running into shell
parameter length limits.
- Tests for 'include' directive for obvious reasons.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If genid is unset, then do not reset existing cache. In the kernel,
generation ID is assumed to be always != zero.
This patch fixes:
nft 'add table x; add chain x y;'
that allow us to send several commands in one single batch from the
command line.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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All these statements are very similar, handling them with the same code
is obvious. The only thing required here is a custom extension of enum
nft_nat_types which is used in nat_stmt to distinguish between snat and
dnat already. Though since enum nft_nat_types is part of kernel uAPI,
create a local extended version containing the additional fields.
Note that nat statement printing got a bit more complicated to get the
number of spaces right for every possible combination of attributes.
Note also that there wasn't a case for STMT_MASQ in
rule_parse_postprocess(), which seems like a bug. Since STMT_MASQ became
just a variant of STMT_NAT, postprocessing will take place for it now
anyway.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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nftables doesn't support vmap with bit-sized headers, such as flow label or dscp:
nft add rule ip filter input ip dscp vmap \{ 4 : accept, 63 : continue \}
BUG: invalid binary operation 5
Unlike plain "ip dscp { 4, 63 }", we don't have a relational operation in
case of vmap. Binop fixups need to be done when evaluating map statements.
This patch is incomplete. 'ip dscp' works, but this won't:
nft add rule --debug=netlink ip6 test-ip6 input ip6 dscp vmap { 0x04 : accept, 0x3f : continue }
The generated expressions look sane, however there is disagreement on
the sets key size vs. the sizes of the individual elements in the set.
This is because ip6 dscp spans a byte boundary.
Key set size is still set to one byte (dscp type is 6bits).
However, binop expansion requirements result in 2 byte loads, i.e.
set members will be 2 bytes in size as well.
This can hopefully get addressed in an incremental patch.
Signed-off-by: Florian Westphal <fw@strlen.de>
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currently this is fine, but a followup commit will add
EXPR_SET_ELEM handling.
And unlike RANGE we cannot assume the key is a value.
Therefore make binop_can_transfer and binop_transfer_one handle
right hand recursively if needed. For RANGE, call it again with
from/to.
For future SET_ELEM, we can then just call the function recursively
again with right->key as new RHS.
Signed-off-by: Florian Westphal <fw@strlen.de>
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In case of EXPR_MAPPING, expr->len is 0, we need to use
the length of the key instead.
Without this we can get assertion failure later on:
nft: netlink_delinearize.c:1484: binop_adjust_one: Assertion `value->len >= binop->right->len' failed.
Signed-off-by: Florian Westphal <fw@strlen.de>
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We cannot assume i->key->key is EXPR_VALUE, we could look e.g. at a range,
which will trigger an assertion failure in binop_adjust_one().
We should call __binop_adjust recursively again in the EXPR_SET_ELEM case,
using key as new input.
Fixes: b8b8e7b6ae10 ("evaluate: transfer right shifts to set reference side")
Signed-off-by: Florian Westphal <fw@strlen.de>
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We can't use nft_exthdr_op to encode routing header, it breaks
ipv6 extension header support.
When encountering RT header, userspace did now set a new ipv6 exthdr mode,
but old kernel doesn't know about this, so this failed with -EOPNOTSUPP.
Revert that part and use NFT_EXTHDR_OP_IPV6.
When decoding a routing extension header, try the various route
types until we find a match.
Note this patch isn't complete:
'srh tag 127' creates following expressions:
[ exthdr load 2b @ 43 + 6 => reg 1 ]
[ cmp eq reg 1 0x00007f00 ]
It should instead insert a dependency test ("rt type 4"):
[ exthdr load 1b @ 43 + 2 => reg 1 ]
[ cmp eq reg 1 0x00000004 ]
[ exthdr load 2b @ 43 + 6 => reg 1 ]
[ cmp eq reg 1 0x00007e00 ]
nft should then use this to infer the routing header type.
While add it, document the srh option.
Fixes: 1400288f6d39d ("src: handle rt0 and rt2 properly")
Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Ahmed Abdelsalam <amsalam20@gmail.com>
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For sets, we allow this:
nft add rule x y ip protocol tcp update @y { ip saddr}
For maps:
table ip nftlb {
map persistencia {
type ipv4_addr : mark
timeout 1h
elements = { 192.168.1.132 expires 59m55s : 0x00000064,
192.168.56.101 expires 59m24s : 0x00000065 }
}
chain pre {
type nat hook prerouting priority 0; policy accept;
update @persistencia \
{ @nh,96,32 : numgen inc mod 2 offset 100 }
}
}
nft --debug=netlink add rule ip nftlb pre add @persistencia \
{ ip saddr : numgen inc mod 2 offset 100 }
More compact and it doesn't gets it confused with a simple map update
command (interesting that bison didn't spew any conflict error).
Former syntax for sets is preserved.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Since netlink_gen_relational() didn't do much anymore after meta OP
treating had been removed, it makes sense to merge it with the only
function it dispached to.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With a bit of code reorganization, relational meta OPs OP_RANGE,
OP_FLAGCMP and OP_LOOKUP become unused and can be removed. The only meta
OP left is OP_IMPLICIT which is usually treated as alias to OP_EQ.
Though it needs to stay in place for one reason: When matching against a
bitmask (e.g. TCP flags or conntrack states), it has a different
meaning:
| nft --debug=netlink add rule ip t c tcp flags syn
| ip t c
| [ meta load l4proto => reg 1 ]
| [ cmp eq reg 1 0x00000006 ]
| [ payload load 1b @ transport header + 13 => reg 1 ]
| [ bitwise reg 1 = (reg=1 & 0x00000002 ) ^ 0x00000000 ]
| [ cmp neq reg 1 0x00000000 ]
| nft --debug=netlink add rule ip t c tcp flags == syn
| ip t c
| [ meta load l4proto => reg 1 ]
| [ cmp eq reg 1 0x00000006 ]
| [ payload load 1b @ transport header + 13 => reg 1 ]
| [ cmp eq reg 1 0x00000002 ]
OP_IMPLICIT creates a match which just checks the given flag is present,
while OP_EQ creates a match which ensures the given flag and no other is
present.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This reverts commit 9047cc7ae746b1c9abd4e11ed476e37d8716d400, this is breaking
tests.
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