| Commit message (Collapse) | Author | Age | Files | Lines |
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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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- data-types.txt: "user space" -> userspace to match usage in statements.txt &
data-types.txt
- nft.txt: "an user-defined" sounds odd to a native English speaker (trust me)
so change to "a user-defined"
These patches are applied on top of Máté's previous 2, but apply fine
without them (2 occurrences of "offset -5 lines").
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Commenting is really useful in complex rulesets, however it is not
documented that they can be added to any rule.
This patch adds commenting possibility to the man page.
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Acked-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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[] means optional but 'add' or 'insert' is not optional one of them is required
which is usually signed with {} braces.
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Acked-by: Duncan Roe <duncan_roe@optusnet.com.au>
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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So the following rule to set the conntrack mark based on the OS passive
recognition works:
# nft add rule x y ct mark set osf name map { "Windows" : 1, "MacOs" : 2 }
Fixes: 9f28b685b473 ("src: introduce passive OS fingerprint matching")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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As no "genre" in pf.os exceed 16 bytes of length, we reduce
NFT_OSF_MAXGENRELEN parameter to 16 bytes and use it instead of IFNAMSIZ.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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These were found by a combination of tkdiff and side-by-side man pages
Most changes preserve or (occasionally) fix highlighting, casing or plurality.
No major omissions were found.
- data-types.txt: (Nothing special)
- nft.txt:
-- changed "`nft' stands for Netfilter" back to "`nf' stands for Netfilter"
-- removed mysterious plus sign
- payload-expression.txt:
-- XML had MTU as 16-bit so changed back from 32. Is that correct?
- primary-expression.txt: (Nothing special)
- statements.txt: (Nothing special)
This patch does not address any of the following observations:
1. Title has changed from nft to NFT
2. There is no attempt at justification.
3. There is no attempt at hyphenation.
4. Long lines of code now wrap instead of indenting nicely.
See e.g. "tcp option" line under EXTENSION HEADER EXPRESSIONS
5. Tables have a lot of empty lines in them.
6. Occasionally there is severe wrapping,
e.g. under CHAINS see add/create/delete/&c. which wrap at about cc40.
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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These were found by ispell -p ./ispell_nft *.txt in nftables/doc.
- ispell.nft: Added some new words
- nft.txt: (nothing special)
- payload-expression.txt: lengthbits and offsetbits were run together
before the conversion to .txt, but the conversion lost the underlining
- primary-expression.txt: ispell suggested rtclassid instead of rtlclassid,
which agres with previous usage
- stateful-objects.txt: (nothing special)
- statements.txt: nonbase chains changed back to non-base chains as it used to
be
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Florian Westphal <fw@strlen.de>
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This run-together header has been there since before the conversion to .txt.
Also the comment starting "without []" wrapped around in an 80cc xterm,
so split into 2 comment lines and fixed grammar (extrs "the").
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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There were some forced hyphenations which only ever looked right in an
80-column terminal and now don't all look right even there e.g.
searched for included files. This op- tion may be specified
Also the URL on the last line
a"http://creativecommons.org/licenses/by-sa/4.0/a(C)
Tested using man in the C locale
Signed-off-by: Duncan Roe <duncan_roe@optusnet.com.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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And update Makefile.am accordingly.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add support for "osf" expression. Example:
table ip foo {
chain bar {
type filter hook input priority 0; policy accept;
osf name "Linux" counter packets 3 bytes 132
}
}
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Correct some typo mistakes done while converting man page source to
asciidoc.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This can be used like ct mark or meta mark except it cannot be set. doc
and tests are included.
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>
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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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This patch adds support for transparent proxy functionality which is
supported in ip, ip6 and inet tables.
The syntax is the following:
tproxy [{|ip|ip6}] to {<ip address>|:<port>|<ip address>:<port>}
It looks for a socket listening on the specified address or port and
assigns it to the matching packet.
In an inet table, a packet matches for both families until address is
specified.
Network protocol family has to be specified **only** in inet tables if
address is specified.
As transparent proxy support is implemented for sockets with layer 4
information, a transport protocol header criterion has to be set in the
same rule. eg. 'meta l4proto tcp' or 'udp dport 4444'
Example ruleset:
table ip x {
chain y {
type filter hook prerouting priority -150; policy accept;
tcp dport ntp tproxy to 1.1.1.1
udp dport ssh tproxy to :2222
}
}
table ip6 x {
chain y {
type filter hook prerouting priority -150; policy accept;
tcp dport ntp tproxy to [dead::beef]
udp dport ssh tproxy to :2222
}
}
table inet x {
chain y {
type filter hook prerouting priority -150; policy accept;
tcp dport 321 tproxy to :ssh
tcp dport 99 tproxy ip to 1.1.1.1:999
udp dport 155 tproxy ip6 to [dead::beef]:smux
}
}
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: Florian Westphal <fw@strlen.de>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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When I tried to send a patch that included man page update I got the
following error from git send-email:
fatal: patch.patch:287: patch contains a line longer than 998 characters
Line 287 was a non-modified line so it was there before my patch.
Even this patch can only be sent with mutt but not with git send-email.
This patch tries to fix this issue by wrapping extra long lines to 80
characters wide.
Signed-off-by: Máté Eckl <ecklm94@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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This file doesn't exist.
Reported-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
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This patch converts nft.xml into asciidoc markup.
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Fix a typo in socket_template struct description.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
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got following bug report:
nft add ... ct mark set mark and 0x10
... always sets 0.
What reporter meant to write instead was 'ct mark', not 'mark'.
We can't just remove support for 'mark' and force
'meta mark', but we can start to discourage it by printing meta prefix too.
Later on, we could start to print deprecation warning if needed.
Followup patch can also change
"iifname" etc. to "meta iifname".
Signed-off-by: Florian Westphal <fw@strlen.de>
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kernel currently permits chains with same name when a transaction renames
2 chains to the same new name. Add a test case for this.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Original script from Taehee Yoo.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add tests for listing specific object for a given table name and all
objects of a table.
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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For e.g.
% nft list ct helper ip raw cthelp1
table ip filter {
}
table ip raw {
ct helper cthelp1 {
type "ftp" protocol tcp
l3proto ip
}
}
With this patch, print only table raw.
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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error was:
nft create set inet filter keepalived_ranges4 { type inet_service . ifname \; }
Error: Empty string is not allowed
This was fixed in
6b00b9537e181 ("evaluate: skip evaluation of datatype concatenations").
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Florian Westphal <fw@strlen.de>
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This fails:
nft add table ip filter
nft add chain ip filter input '{' type filter hook input priority 0 ';' '}'
nft add set ip filter protocols '{' type inet_proto ';' '}'
nft add rule ip filter input iifname lo set add ip protocol @protocols
^^^^^^^^^^^^^^^^^^^
...as wrong set type gets chosen.
Describe dynamic flag and that sets should have both timeout and
max size set.
Signed-off-by: Florian Westphal <fw@strlen.de>
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These are not really expressions, so there is not value in place. The
expr_evaluate_concat() is called from set_evaluate() to calculate the
total length of the tuple.
Closes: https://bugzilla.netfilter.org/show_bug.cgi?id=1265
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch describe the new --literal option.
Remove documentation on -N to prepare it for deprecation.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Default not to print the service name as we discussed during the NFWS.
# nft list ruleset
table ip x {
chain y {
tcp dport 22
ip saddr 1.1.1.1
}
}
# nft -l list ruleset
table ip x {
chain y {
tcp dport ssh
ip saddr 1.1.1.1
}
}
# nft -ll list ruleset
table ip x {
chain y {
tcp dport 22
ip saddr 1dot1dot1dot1.cloudflare-dns.com
}
}
Then, -ll displays FQDN. just like the (now deprecated) --ip2name (-N)
option.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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limit http-traffic { rate 1/second } gets printed as
limit http-traffic { rate 1/second burst 5 packets }
caused tests/shell/run-tests.sh tests/shell/testcases/sets/0026named_limit_0
to return 'DUMP FAIL'.
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Máté Eckl <ecklm94@gmail.com>
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Shell prompt ends with:
"%", indicates a C shell.
"$", indicates shell that's compatible with the Bash.
"#", indicates shell is running as the system's root.
So, "%" is replaced with "$" or "#".
Signed-off-by: Arushi Singhal <arushisinghal19971997@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
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The original intent was to fix a bug: The following rule in inet table:
| meta nfproto ipv4 icmpv6 type echo-reply
Was added correctly but when printing the meta match was falsely
removed. The fix is to deny dependency killing if RHS family of nfproto
match doesn't match RHS family of l4proto match. Adding this to the
already large conditional led to even more unreadable code, therefore
this patch tries to clean that up (and also removes the partial code
duplication.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
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policy type is erronously handled via verdict, this is wrong.
It is a different event type and needs to be handled as such.
before:
trace id 42b54e71 inet filter input packet: iif "lo" ip saddr 127.0.0.1 ..
trace id 42b54e71 inet filter input rule ip protocol icmp nftrace set 1 (verdict continue)
trace id 42b54e71 inet filter input verdict continue
trace id 42b54e71 inet filter input
after:
trace id 9f40c5c7 inet filter input packet: iif "lo" ip saddr 127.0.0.1 ..
trace id 9f40c5c7 inet filter input rule ip protocol icmp nftrace set 1 (verdict continue)
trace id 9f40c5c7 inet filter input verdict continue
trace id 9f40c5c7 inet filter input policy drop
Reported-by: vtol@gmx.net
Signed-off-by: Florian Westphal <fw@strlen.de>
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