| Commit message (Collapse) | Author | Age | Files | Lines |
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Special meaning of asterisk in interface names wasn't described
anywhere.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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This unifies the redundant information in sets and maps sections and
also covers 'get' command.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add a couple of Python test-cases for setting the CT mark to a bitwise
expression derived from the packet mark and vice versa.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The JSON output was missing for some existing tests.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add a couple of shell test-cases for setting the CT mark to a bitwise
expression derived from the packet mark and vice versa.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The byte-order of the righthand operands of the right-shifts generated
for payload and exthdr expressions is big-endian. However, all right
operands should be host-endian. Since evaluation of the shift binop
will insert a byte-order conversion to enforce this, change the
endianness in order to avoid the extra operation.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Rename the `lshift` variable used to store an right-shift expression to
`rshift`.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Primary and primary RHS expressions support parenthesized basic and
basic RHS expressions. However, primary statement expressions do not
support parenthesized basic statement expressions. Add them.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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After exporting field lengths via NFTNL_SET_DESC_CONCAT attributes,
we now need to adjust parsing of user input and generation of
netlink key data to complete support for concatenation of set
ranges.
Instead of using separate elements for start and end of a range,
denoting the end element by the NFT_SET_ELEM_INTERVAL_END flag,
as it's currently done for ranges without concatenation, we'll use
the new attribute NFTNL_SET_ELEM_KEY_END as suggested by Pablo. It
behaves in the same way as NFTNL_SET_ELEM_KEY, but it indicates
that the included key represents the upper bound of a range.
For example, "packets with an IPv4 address between 192.0.2.0 and
192.0.2.42, with destination port between 22 and 25", needs to be
expressed as a single element with two keys:
NFTA_SET_ELEM_KEY: 192.0.2.0 . 22
NFTA_SET_ELEM_KEY_END: 192.0.2.42 . 25
To achieve this, we need to:
- adjust the lexer rules to allow multiton expressions as elements
of a concatenation. As wildcards are not allowed (semantics would
be ambiguous), exclude wildcards expressions from the set of
possible multiton expressions, and allow them directly where
needed. Concatenations now admit prefixes and ranges
- generate, for each element in a range concatenation, a second key
attribute, that includes the upper bound for the range
- also expand prefixes and non-ranged values in the concatenation
to ranges: given a set with interval and concatenation support,
the kernel has no way to tell which elements are ranged, so they
all need to be. For example, 192.0.2.0 . 192.0.2.9 : 1024 is
sent as:
NFTA_SET_ELEM_KEY: 192.0.2.0 . 1024
NFTA_SET_ELEM_KEY_END: 192.0.2.9 . 1024
- aggregate ranges when elements received by the kernel represent
concatenated ranges, see concat_range_aggregate()
- perform a few minor adjustments where interval expressions
are already handled: we have intervals in these sets, but
the set specification isn't just an interval, so we can't
just aggregate and deaggregate interval ranges linearly
v4: No changes
v3:
- rework to use a separate key for closing element of range instead of
a separate element with EXPR_F_INTERVAL_END set (Pablo Neira Ayuso)
v2:
- reworked netlink_gen_concat_data(), moved loop body to a new function,
netlink_gen_concat_data_expr() (Phil Sutter)
- dropped repeated pattern in bison file, replaced by a new helper,
compound_expr_alloc_or_add() (Phil Sutter)
- added set_is_nonconcat_range() helper (Phil Sutter)
- in expr_evaluate_set(), we need to set NFT_SET_SUBKEY also on empty
sets where the set in the context already has the flag
- dropped additional 'end' parameter from netlink_gen_data(),
temporarily set EXPR_F_INTERVAL_END on expressions and use that from
netlink_gen_concat_data() to figure out we need to add the 'end'
element (Phil Sutter)
- replace range_mask_len() by a simplified version, as we don't need
to actually store the composing masks of a range (Phil Sutter)
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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To support arbitrary range concatenations, the kernel needs to know
how long each field in the concatenation is. The new libnftnl
NFTNL_SET_DESC_CONCAT set attribute describes this as an array of
lengths, in bytes, of concatenated fields.
While evaluating concatenated expressions, export the datatype size
into the new field_len array, and hand the data over via libnftnl.
Similarly, when data is passed back from libnftnl, parse it into
the set description.
When set data is cloned, we now need to copy the additional fields
in set_clone(), too.
This change depends on the libnftnl patch with title:
set: Add support for NFTA_SET_DESC_CONCAT attributes
v4: No changes
v3: Rework to use set description data instead of a stand-alone
attribute
v2: No changes
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Get this header in sync with nf-next as of merge commit
b3a608222336 (5.6-rc1-ish).
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Support -H/--host option to use host's libnftables.so.1. Alternatively
users may specify a custom library path via -l/--library option.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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Add support for -H/--host flag to use 'nft' tool from $PATH instead of
the local one.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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Support -H/--host option to use host's libnftables.so.1. Alternatively
users may specify a custom library path via -l/--library option.
Signed-off-by: Phil Sutter <phil@nwl.cc>
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The keys() method returns an object which does not support indexing, so
convert it to a list prior to doing so.
Fixes: a35e3a0cdc63a ("tests: json_echo: convert to py3")
Signed-off-by: Phil Sutter <phil@nwl.cc>
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The kernel supports bitwise shift operations, so add support to the
netlink linearization and delinearization code. The number of bits (the
righthand operand) is expected to be a 32-bit value in host endianness.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The kernel UAPI header includes a couple of new bitwise netlink
attributes and an enum.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The statement doesn't compile, so remove it.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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s/Of/If/ in comment describing function.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Remove some trailing white-space and fix some indentation.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add ctags and etags tag files, and Emacs back-up files.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The comment documenting how bitwise expressions work includes a table
which summarizes the mask and xor arguments combined to express the
supported boolean operations. However, the row for OR:
mask xor
0 x
is incorrect.
dreg = (sreg & 0) ^ x
is not equivalent to:
dreg = sreg | x
What the code actually does is:
dreg = (sreg & ~x) ^ x
Update the documentation to match.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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* Missing nft_fib_inet.
* nft_chain_nat_ipv4 and nft_chain_nat_ipv6 became nft_chain_nat.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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A simple test to cover set lookup and update in one rule.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With payload_needs_l4csum_update_pseudohdr() unconditionally
dereferencing passed 'desc' parameter and a previous check for it to be
non-NULL, make sure to call the function only if input is sane.
Fixes: 68de70f2b3fc6 ("netlink_linearize: fix IPv6 layer 4 checksum mangling")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This fixes several problems at once:
* Err path would leak expr 'right' in two places and 'left' in one.
* Concat case would leak 'right' by overwriting the pointer. Introduce a
temporary variable to hold the new pointer.
Fixes: 6377380bc265f ("netlink_delinearize: handle relational and lookup concat expressions")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Allocated 'mask' expression is not freed before returning to caller,
although it is used temporarily only.
Fixes: b851ba4731d9f ("src: add interface wildcard matching")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Users get confused with the existing error notice, let's try a different one:
# nft add element x y { 1.1.1.0/24 }
Error: You must add 'flags interval' to your set declaration if you want to add prefix elements
add element x y { 1.1.1.0/24 }
^^^^^^^^^^
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1380
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Phil Sutter <phil@nwl.cc>
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Reset command causes a dump of the objects to reset and adds those to
cache. Yet it ignored if the object in question was already there and up
to now CMD_RESET was flagged as NFT_CACHE_FULL.
Tackle this from two angles: First, reduce cache requirements of reset
command to the necessary bits which is table cache. This alone would
suffice if there wasn't interactive mode (and other libnftables users):
A cache containing the objects to reset might be in place already, so
add dumped objects to cache only if they don't exist already.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Instead of calling 'which diff' over and over again, just detect the
tool's presence in run-tests.sh and pass $DIFF to each testcase just
like with nft binary.
Fall back to using 'true' command to avoid the need for any conditional
calling in test cases.
While being at it, unify potential diff calls so that a string
comparison in shell happens irrespective of diff presence.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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the kernel stores spi in a __be32, so fix up the byteorder annotation.
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Previous fix for named interval sets was simply wrong: Instead of
limiting decomposing to anonymous interval sets, it effectively disabled
it entirely.
Since code needs to check for both interval and anonymous bits
separately, introduce set_is_interval() helper to keep the code
readable.
Also extend test case to assert ranges in anonymous sets are correctly
printed by echo or monitor modes. Without this fix, range boundaries are
printed as individual set elements.
Fixes: 5d57fa3e99bb9 ("monitor: Do not decompose non-anonymous sets")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Recognize testcase paths on command line and limit testing on those
only.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When populating the dummy set, 'data' field must be cloned just like
'key' field.
Fixes: 343a51702656a ("src: store expr, not dtype to track data in sets")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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They have been decomposed already, trying to do that again causes a
segfault. This is a similar fix as in commit 8ecb885589591 ("src:
restore --echo with anonymous sets").
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Broken since options are mandatory before commands.
Fixes: fb9cea50e8b3 ("main: enforce options before commands")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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expr_evaluate_binop calls expr_set_context for shift expressions to set
the context data-type to `integer`. This clobbers the byte-order of the
context, resulting in unexpected conversions to NBO. For example:
$ sudo nft flush ruleset
$ sudo nft add table t
$ sudo nft add chain t c '{ type filter hook output priority mangle; }'
$ sudo nft add rule t c oif lo tcp dport ssh ct mark set '0x10 | 0xe'
$ sudo nft add rule t c oif lo tcp dport ssh ct mark set '0xf << 1'
$ sudo nft list table t
table ip t {
chain c {
type filter hook output priority mangle; policy accept;
oif "lo" tcp dport 22 ct mark set 0x0000001e
oif "lo" tcp dport 22 ct mark set 0x1e000000
}
}
Replace it with a call to __expr_set_context and set the byteorder to
that of the left operand since this is the value being shifted.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds a test to cover delete flowtable after chain flush
including two rule references to the flowtable.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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scanner_pop_buffer() incorrectly sets the current input descriptor. The
state->indesc_idx field actually stores the number of input descriptors
in the stack, decrement it and then update the current input descriptor
accordingly.
Fixes: 60e917fa7cb5 ("src: dynamic input_descriptor allocation")
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1383
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Adds "meta sdif" and "meta sdifname".
Both only work in input/forward hook of ipv4/ipv6/inet family.
Cc: Martin Willi <martin@strongswan.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Benjamin Poirier <benjamin.poirier@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch turns on POSIXLY_CORRECT on the getopt parser to enforce
options before commands. Users get a hint in such a case:
# nft list ruleset -a
Error: syntax error, options must be specified before commands
nft list ruleset -a
^ ~~
This patch recovers 9fc71bc6b602 ("main: Fix for misleading error with
negative chain priority").
Tests have been updated.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Florian Westphal <fw@strlen.de>
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If user says
'type integer; ...' in a set definition, don't just throw an error --
provide a hint that the typeof keyword can be used to provide
the needed size information.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Add sets using unspecific string/integer types, one with
osf name, other with vlan id. Neither type can be used directly,
as they lack the type size information.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Same as key: if the size isn't divisible by BITS_PER_BYTE, we need to
round up, not down.
Without this, you can't store vlan ids in a map, as they are truncated
to 8 bit.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Add support for meta userdata area.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Add support for meta userdata area.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Add support for meta userdata area.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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