| Commit message (Collapse) | Author | Age | Files | Lines |
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When adding a new test, missing payload file causes nft-test.py to choke
due to accessing undeclared variables. Fix this by making sure relevant
variables are declared outside of try-catch blocks.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Otherwise this breaks tests/py/.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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So we compare input and output are the same.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Remove osf_init variable and call nfnl_osf_load_fingerprints() from
expr_evaluate_osf() instead of doing that from do_command_add() path.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add tests for listing ct timeout objects and input from file.
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add test for adding ct timeout objects and assigning it via rule.
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds support for adding, listing and deleting ct timeout
objects which can be assigned via rule to assign connection tracking
timeout policies via objref infrastructure.
% nft add table filter
% nft add chain filter output
% nft add ct timeout filter test-tcp { protocol tcp \; policy = { established: 132, close: 13, close_wait: 17 } \; }
% nft add rule filter output ct timeout set test-tcp
% nft list ruleset
table ip filter {
ct timeout test-tcp {
protocol tcp;
l3proto ip
policy = {established: 132, close_wait: 17, close: 13}
}
chain output {
ct timeout set "test-tcp"
}
}
% nft delete rule filter output handle <handle>
% nft delete ct timeout filter test-tcp
Note: Original patch has been rework to use fixed size array for
timeouts and to validate timeout policy from the evaluation phase, once
we have access to the layer 4 protocol number. --pablo
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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When trying to add a chain to a non-existing table, error reporting
tries to dereference indesc pointer of the table's location. Hence make
sure the latter is initialized correctly.
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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Right now this object merely contains the nftables version and release
name as well as a JSON schema version, but it could be extended
arbitrarily. In the future, this will also allow for non-compatible
schema changes should the need for this arise.
Adjust the parser to accept metainfo objects and make it verify
json_schema_version to be less than or equal to the one hard-coded in
the library.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This special operator is required for cases where missing operator does
not lead to same results as equal operator, i.e. with bitmasks on RHS.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Instead of the generic "left" and "right", use "key" and "value".
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Change the rather generic "left" and "right" into "key" and "data" as
suggested at NFWS.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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For raw payloads, property "name" is not needed, it's clearly identified
by base/offset/len properties.
In non-raw payload expressions, rename property "name" to "protocol" as
suggested during NFWS.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Change jump and goto verdicts to become extensible by dedicating an
object for the target parameter.
While being at it, drop break and queue verdict expressions since they
don't seem to exist, no idea where I got those from in the first place.
For queue, there is a dedicated expression at least.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Lessons learned from fwd statement: We must not assume a given
statement/expression may not receive further properties in the future.
Therefore make meta value an object with a property "key" instead of
just a string containing the key name.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Drop the bits for TABLE from synopsis section - adding the remaining
objects there as well is tedious and tends to become unreadable. Instead
assume that readers will find the objects' descriptions in their
sections.
Also fix JSON syntax in many objects: The properties are enclosed in an
object, of course.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The introductory example was a bit flawed in that the third command
('list ruleset') wouldn't yield expected results due to all three
commands ending in a single transaction and therefore the changes of the
first two commands were not committed yet at the time ruleset was
listed.
Instead demonstrate adding a chain and a rule to the new table.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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As suggested at NFWS, the implicit nfproto dependencies generated by
icmp/icmpv6 header field matches should be documented along with how to
achieve matching on unusual packets.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This was surprisingly hard to get right, but this should do the trick.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Not only ./configure, but make sure compilation does not break for each
option.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Just for sanity reasons.
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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evaluation step currently prohibits
tproxy ip to 1.2.3.4 in ip family, and
tproxy ip6 to dead::1 in ip6.
This seems an arbitrary limitation, just accept this.
The current restriction would make json output support harder than needed,
as the tproxy expression generated from json path would have to
special-case the table its currently in, rather than just using the
family attribute in the json output.
We obviously still reject the family in case it mismatches
the table family (e.g., can't use ip address in ip6 table).
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Florian Westphal <fw@strlen.de>
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Plain user is just fine.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Commit 9e45a28ca467f ("src: honor /etc/services") broke compiling with
JSON support enabled: inet_service_type_print() is not suited for
converting inet_service datatype into JSON at all.
In order to avoid having to replicate the port value resolving into
human-readable name in inet_service_type_json(), just return a numeric
value. At least for JSON output, this probably makes most sense either
way since the output is expected to be parsed by scripts which have an
easier time with numers than names anyway.
Fixes: 9e45a28ca467f ("src: honor /etc/services")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This partial patch reverts:
ccc5da470e76 ("datatype: Replace getnameinfo() by internal lookup table")
f0f99006d34b ("datatype: Replace getaddrinfo() by internal lookup table")
so /etc/services is used to interpret service names, eg.
# nft add rule x y tcp dport \"ssh\"
Then, listing looks like:
# nft list ruleset -l
table x {
chain y {
...
tcp dport "ssh"
}
}
Major changes with regards to the original approach are:
1) Services are displayed in text via `-l' option.
2) Services are user-defined, just like mappings in /etc/iproute2/*
files and connlabel.conf, so they are displayed enclosed in quotes.
Note that original service name code was broken since it parses both udp
and tcp service names but it only displays tcp services names as
literal. This is because NI_DGRAM is missing. This patch makes nft falls
back on udp services if no literal was found in the initial tcp service
name query. Proper way to handle would be to add infrastructure to store
protocol context information in struct output_ctx.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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So far if invalid priority name was specified the error message referred
to the whole chain/flowtable specification:
nft> add chain ip x h { type filter hook prerouting priority first; }
Error: 'first' is invalid priority in this context.
add chain ip x h { type filter hook prerouting priority first; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
With this patch this reference is made specific to the priority
specification:
nft> add chain ip x h { type filter hook prerouting priority first; }
Error: 'first' is invalid priority in this context.
add chain ip x h { type filter hook prerouting priority first; }
^^^^^^^^^^^^^^
`prio_spec` is also reused to keep naming intuitive. The parser section
formerly named `prio_spec` is renamed to `int_num` as it basically
provides the mathematical set of integer numbers.
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The following example shows how to populate a set from the packet path
using the destination IP address, for each entry there is a counter. The
entry expires after the 1 hour timeout if no packets matching this entry
are seen.
table ip x {
set xyz {
type ipv4_addr
size 65535
flags dynamic,timeout
timeout 1h
}
chain y {
type filter hook output priority filter; policy accept;
update @xyz { ip daddr counter } counter
}
}
Similar example, that creates a mapping better IP address and mark,
where the mark is assigned using an incremental sequence generator from
0 to 1 inclusive.
table ip x {
map xyz {
type ipv4_addr : mark
size 65535
flags dynamic,timeout
timeout 1h
}
chain y {
type filter hook input priority filter; policy accept;
update @xyz { ip saddr counter : numgen inc mod 2 }
}
}
Supported stateful statements are: limit, quota, counter and connlimit.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Instead of using the map expression, store dynamic key and data
separately since they need special handling than constant maps.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Ruleset listing with --stateless should not display the content of
sets that are dynamically populated from the packet path.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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chain y {
type filter hook output priority filter; policy accept;
update @xyz{ ip daddr }
^^
Missing space between set reference and the element statement. This does
not break restoring the ruleset but it is inconsistent to the viewer.
There is also an extra space after the element statement that is
enclosed in brackets.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Import iptables/utils/nfnl_osf.c into nftables tree with some changes in order
to load OS fingerprints automatically from pf.os file.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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As we are going to use the function nft_mnl_talk() from the incoming
nftnl_osf.c, we make it public.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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As we are going to need pf.os file to load OS fingerprints from the incoming
nfnl_osf.c, we copy it into the nftables tree directory "files/osf/".
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Commit c8a0e8c90 added #include <linux/netfilter_bridge.h> but that header needs
the definition of IFNAMSIZ from <net/if.h>
Sample build failure:
CC evaluate.lo
In file included from ../include/linux/netfilter_bridge.h:10:0,
from rule.c:32:
/usr/include/linux/if_pppox.h:42:20: error: 'IFNAMSIZ' undeclared here (not in a function)
char dev[IFNAMSIZ]; /* Local device to use */
^
Makefile:687: recipe for target 'rule.lo' failed
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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See comments at end of doc/build_pdfs.sh
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This adds unnecessary complexity to our build infrastructure. People can
just manually generate them in PDF in case they need too. So let's keep
it simple and remove this.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Update script with missing new kernel modules.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Double-spacing in .txt files has no effect on PDF or man page output and
can make it hard to locate phrases when editing, so remove them.
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Since 6dd848339444 ("src: meta: always prefix 'meta' for almost all
tokens"), the unqualified meta are discouraged. Adjust test not to fail.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Commit 3e6ab2b335142 added restraints on reject types for bridge and
inet families but aparently those were too strict: If a rule in e.g.
inet family contained a match which introduced a protocol dependency,
icmpx type rejects were disallowed for no obvious reason.
Allow icmpx type rejects in inet family regardless of protocol
dependency since we either have IPv4 or IPv6 traffic in there and for
both icmpx is fine.
Merge restraints in bridge family with those for TCP reset since it
already does what is needed, namely checking that ether proto is either
IPv4 or IPv6.
Fixes: 3e6ab2b335142 ("evaluate: reject: check in bridge and inet the network context in reject")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the possibility to use textual names to set the chain priority
to standard values so that numeric values do not need to be learnt any more for
basic usage.
Basic arithmetic can also be done with them to ease the addition of
relatively higher/lower priority chains.
Addition and substraction is possible.
Values are also printed with their friendly name within the range of
<basicprio> +- 10.
Also numeric printing is supported in case of -nnn option
(numeric == NFT_NUMERIC_ALL)
The supported name-value pairs and where they are valid is based on how
x_tables use these values when registering their base chains. (See
iptables/nft.c in the iptables repository).
Also see the compatibility matrices extracted from the man page:
Standard priority names, family and hook compatibility matrix
┌─────────┬───────┬────────────────┬─────────────┐
│Name │ Value │ Families │ Hooks │
├─────────┼───────┼────────────────┼─────────────┤
│ │ │ │ │
│raw │ -300 │ ip, ip6, inet │ all │
├─────────┼───────┼────────────────┼─────────────┤
│ │ │ │ │
│mangle │ -150 │ ip, ip6, inet │ all │
├─────────┼───────┼────────────────┼─────────────┤
│ │ │ │ │
│dstnat │ -100 │ ip, ip6, inet │ prerouting │
├─────────┼───────┼────────────────┼─────────────┤
│ │ │ │ │
│filter │ 0 │ ip, ip6, inet, │ all │
│ │ │ arp, netdev │ │
├─────────┼───────┼────────────────┼─────────────┤
│ │ │ │ │
│security │ 50 │ ip, ip6, inet │ all │
├─────────┼───────┼────────────────┼─────────────┤
│ │ │ │ │
│srcnat │ 100 │ ip, ip6, inet │ postrouting │
└─────────┴───────┴────────────────┴─────────────┘
Standard priority names and hook compatibility for the bridge family
┌───────┬───────┬─────────────┐
│ │ │ │
│Name │ Value │ Hooks │
├───────┼───────┼─────────────┤
│ │ │ │
│dstnat │ -300 │ prerouting │
├───────┼───────┼─────────────┤
│ │ │ │
│filter │ -200 │ all │
├───────┼───────┼─────────────┤
│ │ │ │
│out │ 100 │ output │
├───────┼───────┼─────────────┤
│ │ │ │
│srcnat │ 300 │ postrouting │
└───────┴───────┴─────────────┘
This can be also applied for flowtables wher it works as a netdev family
chain.
Example:
nft> add table ip x
nft> add chain ip x y { type filter hook prerouting priority raw; }
nft> add chain ip x z { type filter hook prerouting priority mangle + 1; }
nft> add chain ip x w { type filter hook prerouting priority dstnat - 5; }
nft> add chain ip x r { type filter hook prerouting priority filter + 10; }
nft> add chain ip x t { type filter hook prerouting priority security; }
nft> add chain ip x q { type filter hook postrouting priority srcnat + 11; }
nft> add chain ip x h { type filter hook prerouting priority 15; }
nft>
nft> add flowtable ip x y { hook ingress priority filter + 5 ; devices = {enp0s31f6}; }
nft>
nft> add table arp x
nft> add chain arp x y { type filter hook input priority filter + 5; }
nft>
nft> add table bridge x
nft> add chain bridge x y { type filter hook input priority filter + 9; }
nft> add chain bridge x z { type filter hook prerouting priority dstnat; }
nft> add chain bridge x q { type filter hook postrouting priority srcnat; }
nft> add chain bridge x k { type filter hook output priority out; }
nft>
nft> list ruleset
table ip x {
flowtable y {
hook ingress priority filter + 5
devices = { enp0s31f6 }
}
chain y {
type filter hook prerouting priority raw; policy accept;
}
chain z {
type filter hook prerouting priority mangle + 1; policy accept;
}
chain w {
type filter hook prerouting priority dstnat - 5; policy accept;
}
chain r {
type filter hook prerouting priority filter + 10; policy accept;
}
chain t {
type filter hook prerouting priority security; policy accept;
}
chain q {
type filter hook postrouting priority 111; policy accept;
}
chain h {
type filter hook prerouting priority 15; policy accept;
}
}
table arp x {
chain y {
type filter hook input priority filter + 5; policy accept;
}
}
table bridge x {
chain y {
type filter hook input priority filter + 9; policy accept;
}
chain z {
type filter hook prerouting priority dstnat; policy accept;
}
chain q {
type filter hook postrouting priority srcnat; policy accept;
}
chain k {
type filter hook output priority out; policy accept;
}
}
nft> # Everything should fail after this
nft> add chain ip x h { type filter hook prerouting priority first; }
Error: 'first' is invalid priority in this context.
add chain ip x h { type filter hook prerouting priority first; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
nft> add chain ip x q { type filter hook prerouting priority srcnat + 11; }
Error: 'srcnat' is invalid priority in this context.
add chain ip x q { type filter hook prerouting priority srcnat + 11; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
nft> add chain arp x y { type filter hook input priority raw; }
Error: 'raw' is invalid priority in this context.
add chain arp x y { type filter hook input priority raw; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
nft> add flowtable ip x y { hook ingress priority magle; devices = {enp0s31f6}; }
Error: 'magle' is invalid priority.
add flowtable ip x y { hook ingress priority magle; devices = {enp0s31f6}; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
nft> add chain bridge x r { type filter hook postrouting priority dstnat; }
Error: 'dstnat' is invalid priority in this context.
add chain bridge x r { type filter hook postrouting priority dstnat; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
nft> add chain bridge x t { type filter hook prerouting priority srcnat; }
Error: 'srcnat' is invalid priority in this context.
add chain bridge x t { type filter hook prerouting priority srcnat; }
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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fix make distcheck for conversion to asciidoc.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Correct all the typos done while converting man page source to asciidoc.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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If there is no basechain, the validation is never exercised.
Too deep nested chains are fine as long as they are not connected to a
basechain.
Update test to add a basechain so we exercise validation.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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