| Commit message (Collapse) | Author | Age | Files | Lines |
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The code which decomposes unclosed intervals doesn't check for prefixes. This
leads to incorrect output for sets which contain these. For example,
# nft -f - <<END
table ip t {
chain c {
ip saddr 192.0.0.0/2 drop
ip saddr 10.0.0.0/8 drop
ip saddr { 192.0.0.0/2, 10.0.0.0/8 } drop
}
}
table ip6 t {
chain c {
ip6 saddr ff00::/8 drop
ip6 saddr fe80::/10 drop
ip6 saddr { ff00::/8, fe80::/10 } drop
}
}
END
# nft list table ip6 t
table ip6 t {
chain c {
ip6 saddr ff00::/8 drop
ip6 saddr fe80::/10 drop
ip6 saddr { fe80::/10, ff00::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff } drop
}
}
# nft list table ip t
table ip t {
chain c {
ip saddr 192.0.0.0/2 drop
ip saddr 10.0.0.0/8 drop
ip saddr { 10.0.0.0/8, 192.0.0.0-255.255.255.255 } drop
}
}
Instead of treating the final unclosed interval as a special case, reuse the
code which correctly handles closed intervals.
Add a shell test-case.
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1018156
Fixes: 86b965bdab8d ("segtree: fix decomposition of unclosed intervals")
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
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'rule inet dscpclassify dscp_match meta l4proto { udp } th dport { 3478 } th sport { 3478-3497, 16384-16387 } goto ct_set_ef'
works with 'nft add', but not 'nft insert', the latter yields: "BUG: unhandled op 4".
Fixes: 81e36530fcac ("src: replace interval segment tree overlap and automerge")
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When listing a stateful object with JSON support, the comment was ignored.
Output example:
{
"counter": {
"family": "inet",
"name": "mycounter",
"table": "t",
"handle": 1,
"comment": "my comment in counter",
"packets": 0,
"bytes": 0
}
}
Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1611
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The secmark object reference requires a json parser function and it was
missing. In addition, extends the shell testcases.
Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1630
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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nft should ignore malformed or missing entries of `json_schema_version` but
check the value when it is integer.
Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1490
Fixes: 49e0f1dc6e52 ("JSON: Add metainfo object to all output")
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When listing a map with statements with JSON support, the statement list were
ignored.
Output example:
{
"map": {
"family": "ip",
"name": "m",
"table": "t",
"type": "ipv4_addr",
"handle": 1,
"map": "mark",
"stmt": [
{
"counter": {
"packets": 0,
"bytes": 0
}
}
]
}
}
Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1588
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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498a5f0c219d added collapsing of set operations in different commands.
However, the logic is currently too relaxed. It is valid to have a
table and set with identical names on different address families.
For example:
table ip a {
set x {
type inet_service;
}
}
table ip6 a {
set x {
type inet_service;
}
}
add element ip a x { 1 }
add element ip a x { 2 }
add element ip6 a x { 2 }
The above currently results in nothing being added to the ip6 family
table due to being collapsed into the ip table add. Prior to
498a5f0c219d the set add would work. The fix is simply to check the
family in addition to the table and set names before allowing a
collapse.
[ Add testcase to tests/shell --pablo ]
Fixes: 498a5f0c219d ("rule: collapse set element commands")
Signed-off-by: Derek Hageman <hageman@inthat.cloud>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When listing a set with statements with JSON support, the statements were
ignored.
Output example:
{
"set": {
"op": "add",
"elem": {
"payload": {
"protocol": "ip",
"field": "saddr"
}
},
"stmt": [
{
"limit": {
"rate": 10,
"burst": 5,
"per": "second"
}
},
{
"counter": {
"packets": 0,
"bytes": 0
}
}
],
"set": "@my_ssh_meter"
}
}
Link: https://bugzilla.netfilter.org/show_bug.cgi?id=1495
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Generalize the existing code to deal with implicit sets. When merging a
ruleset like the following:
udp dport 128 iifname "foo" #1
udp dport { 67, 123 } iifname "bar" #2
into a concatenation of statements, the following expansion need to
be done for rule #2:
67 . "bar"
123 . "bar"
The expansion logic consists of cloning the existing concatenation being
built and then append each element in the implicit set. A list of
ongoing concatenations being built is maintained, so further expansions
are also supported.
Extend test to cover for this use-case.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1628
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In verdict map, string values are accidentally treated as verdicts.
For example:
table t {
map foo {
type ipv4_addr : verdict
elements = {
192.168.0.1 : bar
}
}
chain output {
type filter hook output priority mangle;
ip daddr vmap @foo
}
}
Though "bar" is not a valid verdict (should be "jump bar" or something),
the string is taken as the element value. Then NFTA_DATA_VALUE is sent
to the kernel instead of NFTA_DATA_VERDICT. This would be rejected by
recent kernels. On older ones (e.g. v5.4.x) that don't validate the
type, a warning can be seen when the rule is hit, because of the
corrupted verdict value:
[5120263.467627] WARNING: CPU: 12 PID: 303303 at net/netfilter/nf_tables_core.c:229 nft_do_chain+0x394/0x500 [nf_tables]
Indeed, we don't parse verdicts during evaluation, but only chain names,
which is of type string rather than verdict. For example, "jump $var" is
a verdict while "$var" is a string.
Fixes: c64457cff967 ("src: Allow goto and jump to a variable")
Signed-off-by: Xiao Liang <shaw.leon@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Rules that are equal need to have at least one mergeable statement.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Existing concatenation cannot be merge at this stage, skip them
otherwise this assertion is hit:
nft: optimize.c:434: rule_build_stmt_matrix_stmts: Assertion `k >= 0' failed
Extend existing test to cover this.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This enables commands like
nft set bridge t s4 '{typeof vlan id . ip daddr; elements = { 3567 .
1.2.3.4 }; }'
Which would previously fail with
Error: can not use variable sized data types (integer) in concat
expressions
Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Pablo reports:
add rule netdev nt y update @macset { vlan id timeout 5s }
listing still shows the raw expression:
update @macset { @ll,112,16 & 0xfff timeout 5s }
so also cover the 'set element' case.
Reported-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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before this patch series, test fails dump validation:
- update @macset { ether saddr . vlan id timeout 5s } counter packets 0 bytes 0
- ether saddr . vlan id @macset
+ update @macset { @ll,48,48 . @ll,112,16 & 0xfff timeout 5s } counter packets 0 bytes 0
+ @ll,48,48 . @ll,112,16 & 0xfff @macset
Signed-off-by: Florian Westphal <fw@strlen.de>
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json_unpack() function is not designed to take a pre-allocated buffer.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1612
Fixes: 3fdc7541fba0 ("src: add multidevice support for netdev chain")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If ruleset update refers to an unexisting table or set, then
cmd->elem.set is NULL.
Fixes: 498a5f0c219d ("rule: collapse set element commands")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If set declaration is missing the interval flag, and user specifies an
element with either prefix or range, then bail out.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1592
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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'ip6 prefix' is valid syntax, so make sure scanner recognizes it
also in ip6 context.
Also add test case.
Fixes: a67fce7ffe7e ("scanner: nat: Move to own scope")
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1619
Signed-off-by: Florian Westphal <fw@strlen.de>
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# nft -f - <<'EOF'
table inet filter {
chain INPUT {
iifname vmap {
"eth0" : jump input_lan,
"wg*" : jump input_vpn
}
}
chain input_lan {}
chain input_vpn {}
}
EOF
# nft list ruleset
nft: segtree.c:578: interval_map_decompose: Assertion `low->len / 8 > 0' failed.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1617
Fixes: 5e393ea1fc0a ("segtree: add string "range" reversal support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Adding elements to a set or map with an invalid definition causes nft to
segfault. The following nftables.conf triggers the crash:
flush ruleset
create table inet filter
set inet filter foo {}
add element inet filter foo { foobar }
Simply parsing and checking the config will trigger it:
$ nft -c -f nftables.conf.crash
Segmentation fault
The error in the set/map definition is correctly caught and queued, but
because the set is invalid and does not contain a key type, adding to it
causes a NULL pointer dereference of set->key within setelem_evaluate().
I don't think it's necessary to queue another error since the underlying
problem is correctly detected and reported when parsing the definition
of the set. Simply checking the validity of set->key before using it
seems to fix it, causing the error in the definition of the set to be
reported properly. The element type error isn't caught, but that seems
reasonable since the key type is invalid or unknown anyway:
$ ./nft -c -f ~/nftables.conf.crash
/home/pti/nftables.conf.crash:3:21-21: Error: set definition does not specify key
set inet filter foo {}
^
[ Add tests to cover this case --pablo ]
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1597
Signed-off-by: Peter Tirsek <peter@tirsek.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If auto-merge is disable and element to be deleted finds no exact
matching, then bail out.
Fixes: 3e8d934e4f72 ("intervals: support to partial deletion with automerge")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The set deletion routine expects an initialized set, otherwise it crashes.
Fixes: 3e8d934e4f72 ("intervals: support to partial deletion with automerge")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Otherwise bogus variable redefinition are reported via -o/--optimize:
redefinition.conf:5:8-21: Error: redefinition of symbol 'interface_inet'
define interface_inet = enp5s0
^^^^^^^^^^^^^^
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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Add test to cover this case.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Just run -o/--optimize on a ruleset.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Do not try to merge rules with unsupported statements. This patch adds a
dummy unsupported statement which is included in the statement
collection and the rule vs statement matrix.
When looking for possible rule mergers, rules using unsupported
statements are discarded, otherwise bogus rule mergers might occur.
Note that __stmt_type_eq() already returns false for unsupported
statements.
Add a test using meta mark statement, which is not yet supported.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add missing code to the statement collection routine. Compare reject
expressions when available. Add tests/shell.
Fixes: fb298877ece2 ("src: add ruleset optimization infrastructure")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Remove rule comment after merging rules, let the user decide if they want
to reintroduce the comment in the ruleset file.
Update optimizations/merge_stmt test.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Otherwise set reference ends up included in an anonymous set, as an
element, which is not supported.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Two new elements that represent an exact overlap should not trigger an error.
add table t
add set t s { type ipv4_addr; flags interval; }
add element t s { 1.0.1.0/24 }
...
add element t s { 1.0.1.0/24 }
result in a bogus error.
# nft -f set.nft
set.nft:1002:19-28: Error: conflicting intervals specified
add element t s { 1.0.1.0/24 }
^^^^^^^^^^
Fixes: 3da9643fb9ff ("intervals: add support to automerge with kernel elements")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add a test to cover runtime set element automerge.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Excess nesting of scanner scopes is very fragile and error prone:
rule `iif != lo ip daddr 127.0.0.1/8 counter limit rate 1/second log flags all prefix "nft_lo4 " drop`
fails with `Error: No symbol type information` hinting at `prefix`
Problem is that we nest via:
counter
limit
log
flags
By the time 'prefix' is scanned, state is still stuck in 'counter' due
to this nesting. Working around "prefix" isn't enough, any other
keyword, e.g. "level" in 'flags all level debug' will be parsed as 'string' too.
So, revert this.
Fixes: a16697097e2b ("scanner: flags: move to own scope")
Reported-by: Christian Göttsche <cgzones@googlemail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Otherwise bogus error reports on set datatype mismatch might occur, such as:
Error: datatype mismatch, expected Internet protocol, expression has type IPv4 address
meta l4proto { tcp, udp } th dport 443 dnat to 10.0.0.1
~~~~~~~~~~~~ ^^^^^^^^^^^^
with an unrelated set declaration.
table ip test {
set set_with_interval {
type ipv4_addr
flags interval
}
chain prerouting {
type nat hook prerouting priority dstnat; policy accept;
meta l4proto { tcp, udp } th dport 443 dnat to 10.0.0.1
}
}
This bug has been introduced in the evaluation step.
Reported-by: Roman Petrov <nwhisper@gmail.com>
Fixes: 81e36530fcac ("src: replace interval segment tree overlap and automerge)"
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Missing ip netns del call from cleanup()
Fixes: d6fdb0d8d482 ("sets_with_ifnames: add test case for concatenated range")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Call xfree() instead since stmt_alloc() does not initialize the
statement type fields.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1609
Fixes: ea1f1c9ff608 ("optimize: memleak in statement matrix")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Refactor existing test case for simple interace name ranges
(without concatenations) to also cover "addr . ifname".
Signed-off-by: Florian Westphal <fw@strlen.de>
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Verdict and nat are mutually exclusive, no need to support for this
combination.
# cat ruleset.nft
table ip x {
chain y {
type nat hook postrouting priority srcnat; policy drop;
ip saddr 1.1.1.1 tcp dport 8000 snat to 4.4.4.4:80
ip saddr 2.2.2.2 tcp dport 8001 snat to 5.5.5.5:90
}
}
# nft -o -c -f ruleset.nft
Merging:
ruleset.nft:4:3-52: ip saddr 1.1.1.1 tcp dport 8000 snat to 4.4.4.4:80
ruleset.nft:5:3-52: ip saddr 2.2.2.2 tcp dport 8001 snat to 5.5.5.5:90
into:
snat to ip saddr . tcp dport map { 1.1.1.1 . 8000 : 4.4.4.4 . 80, 2.2.2.2 . 8001 : 5.5.5.5 . 90 }
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Keep inspecting rule verdicts before assuming they are equal. Update
existing test to catch this bug.
Fixes: 1542082e259b ("optimize: merge same selector with different verdict into verdict map")
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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Extend the interval codebase to support for merging elements in the
kernel with userspace element updates.
Add a list of elements to be purged to cmd and set objects. These
elements representing outdated intervals are deleted before adding the
updated ranges.
This routine splices the list of userspace and kernel elements, then it
mergesorts to identify overlapping and contiguous ranges. This splice
operation is undone so the set userspace cache remains consistent.
Incrementally update the elements in the cache, this allows to remove
dd44081d91ce ("segtree: Fix add and delete of element in same batch").
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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nft get element inet filter s { bla, prefixfoo }
table inet filter {
set s {
type ifname
flags interval
elements = { "prefixfoo*",
"bla" }
}
Also add test cases for this.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add initial test case, sets with names and interfaces,
anonymous and named ones.
Check match+no-match.
netns with ppp1 and ppq veth, send packets via both interfaces.
Rule counters should have incremented on the three rules.
(that match on set that have "abcdef1" or "abcdef*" strings in them).
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch reverts d0f14b5337e7 ("optimize: do not merge raw payload
expressions") after adding support for concatenation with variable
length TYPE_INTEGER.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Header fields such as udp length cannot be used in concatenations because
it is using the generic integer_type:
test.nft:3:10-19: Error: can not use variable sized data types (integer) in concat expressions
typeof udp length . @th,32,32
^^^^^^^^^^~~~~~~~~~~~~
This patch slightly extends ("src: allow to use typeof of raw expressions in
set declaration") to set on NFTNL_UDATA_SET_KEY_PAYLOAD_LEN in userdata if
TYPE_INTEGER is used.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Use the dynamic datatype to allocate an instance of TYPE_INTEGER and set
length and byteorder. Add missing information to the set userdata area
for raw payload expressions which allows to rebuild the set typeof from
the listing path.
A few examples:
- With anonymous sets:
nft add rule x y ip saddr . @ih,32,32 { 1.1.1.1 . 0x14, 2.2.2.2 . 0x1e }
- With named sets:
table x {
set y {
typeof ip saddr . @ih,32,32
elements = { 1.1.1.1 . 0x14 }
}
}
Incremental updates are also supported, eg.
nft add element x y { 3.3.3.3 . 0x28 }
expr_evaluate_concat() is used to evaluate both set key definitions
and set key values, using two different function might help to simplify
this code in the future.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Otherwise listing breaks showing [invalid type] notice.
# nft list ruleset
table inet x {
map y {
typeof ip saddr : verdict
elements = { 1.1.1.1 : 0x1010101 [invalid type] }
}
}
Update tests to cover this usecase.
Fixes: 4ab1e5e60779 ("src: allow use of 'verdict' in typeof definitions")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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without this test fails with:
W: [FAILED] tests/shell/testcases/maps/anon_objmap_concat: got 134
BUG: invalid range expression type concat
nft: expression.c:1452: range_expr_value_low: Assertion `0' failed.
Signed-off-by: Florian Westphal <fw@strlen.de>
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else, this will segfault when trying to print the
"table 'x' doesn't exist" error message.
Signed-off-by: Florian Westphal <fw@strlen.de>
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