| Commit message (Collapse) | Author | Age | Files | Lines |
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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So far it was only possible to match packet under a rate limit, this
patch allows you to explicitly indicate if you want to match packets
that goes over or until the rate limit, eg.
... limit rate over 3/second counter log prefix "OVERLIMIT: " drop
... limit rate over 3 mbytes/second counter log prefix "OVERLIMIT: " drop
... ct state invalid limit rate until 1/second counter log prefix "INVALID: "
When listing rate limit until, this shows:
... ct state invalid limit rate 1/second counter log prefix "INVALID: "
thus, the existing syntax is still valid (i.e. default to rate limit until).
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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packets and bytes need special treatment -- we want to be able to get
packet/byte counter in either direction, but also express
'fetch in *BOTH* directions', i.e.
ct packets original + ct packets reply > 1000
This either requires a '+' expression, a new 'both' direction, or
keys where direction is optional, i.e.
ct packets > 12345 ; original + reply
ct original packets > 12345 ; original
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add support for payload mangling using the payload statement. The syntax
is similar to the other data changing statements:
nft filter output tcp dport set 25
Signed-off-by: Patrick McHardy <kaber@trash.net>
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This allows you to clone packets to destination address, eg.
... dup to 172.20.0.2
... dup to 172.20.0.2 device eth1
... dup to ip saddr map { 192.168.0.2 : 172.20.0.2, ... } device eth1
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This example show how to accept packets below the ratelimit:
... limit rate 1024 mbytes/second counter accept
You need a Linux kernel >= 4.3-rc1.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds support for the new 'netdev' table. So far, this table allows
you to create filter chains from ingress.
The following example shows a very simple base configuration with one table that
contains a basechain that is attached to the 'eth0':
# nft list table netdev filter
table netdev filter {
chain eth0-ingress {
type filter hook ingress device eth0 priority 0; policy accept;
}
}
You can test that this works by adding a simple rule with counters:
# nft add rule netdev filter eth0-ingress counter
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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The set statement is used to dynamically add or update elements in a set.
Syntax:
# nft filter input set add tcp dport @myset
# nft filter input set add ip saddr timeout 10s @myset
# nft filter input set update ip saddr timeout 10s @myset
Signed-off-by: Patrick McHardy <kaber@trash.net>
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Syntax:
# nft add element filter test { 192.168.0.1 comment "some host" }
Signed-off-by: Patrick McHardy <kaber@trash.net>
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Support specifying per element timeout values and displaying the expiration
time.
If an element should not use the default timeout value of the set, an
element specific value can be specified as follows:
# nft add element filter test { 192.168.0.1, 192.168.0.2 timeout 10m}
For listing of elements that use the default timeout value, just the
expiration time is shown, otherwise the element specific timeout value
is also displayed:
set test {
type ipv4_addr
timeout 1h
elements = { 192.168.0.2 timeout 10m expires 9m59s, 192.168.0.1 expires 59m59s}
}
Signed-off-by: Patrick McHardy <kaber@trash.net>
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Timeout support can be enabled in one of two ways:
1. Using a default timeout value:
set test {
type ipv4_addr;
timeout 1h;
}
2. Using the timeout flag without a default:
set test {
type ipv4_addr;
flags timeout;
}
Optionally a garbage collection interval can be specified using
gc-interval <interval>;
Signed-off-by: Patrick McHardy <kaber@trash.net>
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1) This removes former Makefiles and install-sh (which is now
automagically imported via autoreconf).
Makefile.defs.in
Makefile.in
Makefile.rules.in
src/Makefile.in
install-sh (now automagically imported via autoreconf).
2) CFLAGS are left almost same, they are integrated into Make_global.am.
Use AM_CPPFLAGS to set the CFLAGS set by pkgconfig.
3) Add m4 directory to the tree which only contains the .gitignore
file. Update .gitignore file to skip autogenerated files.
4) include <config.h> whenever required.
5) Minor adjustments to scanner.l and parser_bison.y to compile cleanly
with autotools.
6) Add %option outfile=lex.yy.c to scanner.l, otherwise I hit this error
here:
gcc -DHAVE_CONFIG_H -I. -I.. -I../include -DDEFAULT_INCLUDE_PATH="\"/usr/etc\"" -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wdeclaration-after-statement -Wsign-compare -Winit-self -Wformat-nonliteral -Wformat-security -Wmissing-format-attribute -Wcast-align -Wundef -Wbad-function-cast -g -O2 -MT mnl.o -MD -MP -MF $depbase.Tpo -c -o mnl.o mnl.c &&\
mv -f $depbase.Tpo $depbase.Po
/bin/sh ../build-aux/ylwrap scanner.l lex.yy.c scanner.c -- flex
make[3]: *** [scanner.c] Error 1
make[3]: Leaving directory `/home/pablo/devel/scm/git-netfilter/nftables/src'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/pablo/devel/scm/git-netfilter/nftables/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/pablo/devel/scm/git-netfilter/nftables'
make: *** [all] Error 2
7) Add Makefile.am for include/ (contributed by Giorgio Dal Molin).
The doc/ and files/ conversion to automake will come in follow up
patches but 'make distcheck' already works.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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The new attribute of meta is "cgroup".
Example of use in nft:
# nft add rule ip test output meta cgroup != 0x100001 counter drop
Moreover, this adds tests to the meta.t test file.
The kernel support is addedin the commit:
ce67417 ("netfilter: nft_meta: add cgroup support")
The libnftnl support is add in the commit:
1d4a480 ("expr: meta: Add cgroup support")
More information about the steps to use cgroup:
https://www.kernel.org/doc/Documentation/cgroups/net_cls.txt
More info about cgroup in iptables:
http://git.kernel.org/cgit/linux/kernel/git/pablo/nftables.git/commit/net/netfilter/xt_cgroup.c?id=82a37132f300ea53bdcd812917af5a6329ec80c3
Signed-off-by: Ana Rey <anarey@gmail.com>
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 patch adds more configuration options to the nat expression.
The syntax is as follow:
% nft add rule nat postrouting <snat|dnat> <nat_arguments> [flags]
Flags are: random, persistent, random-fully.
Example:
% nft add rule nat postrouting dnat 1.1.1.1 random,persistent
A requirement is to cache some [recent] copies of kernel headers.
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch allows to use the reject action in rules. For example:
nft add rule filter input udp dport 22 reject
In this rule, we assume that the reason is network unreachable. Also
we can specify the reason with the option "with" and the reason. For example:
nft add rule filter input tcp dport 22 reject with icmp type host-unreachable
In the bridge tables and inet tables, we can use this action too. For example:
nft add rule inet filter input reject with icmp type host-unreachable
In this rule above, this generates a meta nfproto dependency to match
ipv4 traffic because we use a icmpv4 reason to reject.
If the reason is not specified, we infer it from the context.
Moreover, we have the new icmpx datatype. You can use this datatype for
the bridge and the inet tables to simplify your ruleset. For example:
nft add rule inet filter input reject with icmpx type host-unreachable
We have four icmpx reason and the mapping is:
ICMPX reason | ICMPv6 | ICMPv4
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admin-prohibited | admin-prohibited | admin-prohibited
port-unreachable | port-unreachable | port-unreachable
no-route | no-route | net-unreachable
host-unreachable | addr-unreachable | host-unreachable
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Obtain the generation ID before dumping the object lists. Then,
check for generation ID updates when dumping the several lists that
this needs. In case of interference, nft has to remove the stale
objects and retry from scratch.
This is complementary to the NLM_F_DUMP_INTR flag which is local
to one single netlink dump.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Keep in sync with nf_tables.h header file in net-next tree.
Rename NFT_CT_LABEL to NFT_CT_LABELS, this probably slipped through
when editing the header file by hand.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This adds device group support in meta expresion.
The new attributes of meta are "iffgroup" and "oifgroup"
- iffgroup: Match device group of incoming device.
- oifgroup: Match device group of outcoming device.
Example of use:
nft add rule ip test input meta iifgroup 2 counter
nft add rule ip test output meta oifgroup 2 counter
The kernel and libnftnl support were added in these commits:
netfilter: nf_tables: add devgroup support in meta expresion
src: meta: Add devgroup support to meta expresion
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This allows you to match cpu handling with a packet.
This is an example of the syntax for this new attribute:
nft add rule ip test input meta cpu 1 counter
nft add rule ip test input meta cpu 1-3 counter
nft add rule ip test input meta cpu { 1, 3} counter
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If you want to match the pkttype field of the skbuff, you have to
use the following syntax:
nft add rule ip filter input meta pkttype PACKET_TYPE
where PACKET_TYPE can be: unicast, broadcast and multicast.
Joint work with Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Alvaro Neira Ayuso <alvaroneay@gmail.com>
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add support to get an input or output bridge interface name through the
relevant meta keys.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Takes advantage of the fact that the current maximum label storage area
is 128 bits, i.e. the dynamically allocated extension area in the
kernel will always fit into a nft register.
Currently this re-uses rt_symbol_table_init() to read connlabel.conf.
This works since the format is pretty much the same.
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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This patch adds support for the queue target. It is now possible
to specify rule sending packet to a given queue and using load
balancing:
nft add rule filter output queue num 3 total 2 options fanout
Signed-off-by: Eric Leblond <eric@regit.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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If nft is compiled without nftables Linux kernel headers installed, we
hit a compilation error:
src/mnl.c: In function ‘mnl_batch_put’:
src/mnl.c:117:16: error: ‘NFNL_SUBSYS_NFTABLES’ undeclared (first use in
this function)
src/mnl.c:117:16: note: each undeclared identifier is reported only once
for each function it appears in
src/mnl.c: In function ‘mnl_batch_begin’:
src/mnl.c:125:16: error: ‘NFNL_MSG_BATCH_BEGIN’ undeclared (first use in
this function)
src/mnl.c: In function ‘mnl_batch_end’:
src/mnl.c:130:16: error: ‘NFNL_MSG_BATCH_END’ undeclared (first use in
this function)
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
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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Signed-off-by: Patrick McHardy <kaber@trash.net>
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Signed-off-by: Patrick McHardy <kaber@trash.net>
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