| Commit message (Collapse) | Author | Age | Files | Lines |
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This patch correlates the in-kernel extended netlink error offset and
the location information.
Assuming 'foo' table does not exist, then error reporting shows:
# nft delete table foo
Error: Could not process rule: No such file or directory
delete table foo
^^^
Similarly, if table uniquely identified by handle '1234' does not exist,
then error reporting shows:
# nft delete table handle 1234
Error: Could not process rule: No such file or directory
delete table handle 1234
^^^^
Assuming 'bar' chain does not exists in the kernel, while 'foo' does:
# nft delete chain foo bar
Error: Could not process rule: No such file or directory
delete chain foo bar
^^^
This also gives us a hint when adding rules:
# nft add rule ip foo bar counter
Error: Could not process rule: No such file or directory
add rule ip foo bar counter
^^^
This is based on ("src: basic support for extended netlink errors") from
Florian Westphal, posted in 2018, with no netlink offset correlation
support.
Signed-off-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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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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This will be needed once we add support for the 'typeof' keyword to
handle maps that could e.g. store 'ct helper' "type" values.
Instead of:
set foo {
type ipv4_addr . mark;
this would allow
set foo {
typeof(ip saddr) . typeof(ct mark);
(exact syntax TBD).
This would be needed to allow sets that store variable-sized data types
(string, integer and the like) that can't be used at at the moment.
Adding special data types for everything is problematic due to the
large amount of different types needed.
For anonymous sets, e.g. "string" can be used because the needed size can
be inferred from the statement, e.g. 'osf name { "Windows", "Linux }',
but in case of named sets that won't work because 'type string' lacks the
context needed to derive the size information.
With 'typeof(osf name)' the context is there, but at the moment it won't
help because the expression is discarded instantly and only the data
type is retained.
Signed-off-by: Florian Westphal <fw@strlen.de>
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If --echo is passed, then the cache already contains the commands that
have been sent to the kernel. However, anonymous sets are an exception
since the cache needs to be updated in this case.
Remove the old cache logic from the monitor code that has been replaced
by 01e5c6f0ed03 ("src: add cache level flags").
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Phil Sutter <phil@nwl.cc>
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These shouldn't happen in practice and printing to stderr is not the
right thing either, but fix this anyway.
Fixes: f9563c0feb24d ("src: add events reporting")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The evaluation step already updates the cache for each command in this
batch. There is no need to update the cache again from the echo path,
otherwise the cache is populated twice with the same object.
Fixes: b99c4d072d99 ("Implement --echo option")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Userdata attribute names have been added to libnftnl, use them instead
of the local copy.
While being at it, rename udata_get_comment() in netlink_delinearize.c
and the callback it uses since the function is specific to rules. Also
integrate the existence check for NFTNL_RULE_USERDATA into it along with
the call to nftnl_rule_get_data().
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Temporary kludge to remove all the expr->ops->type == ... patterns.
Followup patch will remove expr->ops, and make expr_ops() lookup
the correct expr_ops struct instead to reduce struct expr size.
Signed-off-by: Florian Westphal <fw@strlen.de>
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This patch adds NFT_CTX_OUTPUT_NUMERIC_SYMBOL, which replaces the last
client of the numeric level approach.
This patch updates `-n' option semantics to display all output
numerically.
Note that monitor code was still using the -n option to skip printing
the process name, this patch updates that path too to print it
inconditionally to simplify things.
Given the numeric levels have no more clients after this patch, remove
that code.
Update several tests/shell not to use -nn.
This patch adds NFT_CTX_OUTPUT_NUMERIC_ALL which enables all flags to
provide a fully numerical output.
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add NFT_CTX_OUTPUT_ECHO flag and echo the command that has been send to
the kernel.
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add NFT_CTX_OUTPUT_JSON flag and display output in json format.
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add NFT_CTX_OUTPUT_HANDLE flag and print handle that uniquely identify
objects from new output flags interface.
Acked-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The basic principle is to not return a JSON object freshly created from
netlink responses, but just update the existing user-provided one to
make sure callers get back exactly what they expect.
To achieve that, keep the parsed JSON object around in a global variable
('cur_root') and provide a custom callback to insert handles into it
from received netlink messages. The tricky bit here is updating rules
since unique identification is problematic. Therefore drop possibly
present handles from input and later assume updates are received in
order so the first rule not having a handle set is the right one.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This switches 'nft monitor' JSON output from using libnftnl's to
libnftables' implementation.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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There seems to be no situation where this comes to play. Also, since
there is no 'nft update table/chain' command, this is inconsistent with
input.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Since libnftnl doesn't support XML formatting, pretending to do so in
nft monitor is pointless.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Store location object in handle to improve error reporting.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Consolidate error reporting from do_command() call.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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netlink.c is rather large file, move the monitor code to its own file.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Phil Sutter <phil@nwl.cc>
Acked-by: Arturo Borrero Gonzalez <arturo@netfilter.org>
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