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* src: add fib expressionFlorian Westphal2016-10-281-0/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds the 'fib' expression which can be used to obtain the output interface from the route table based on either source or destination address of a packet. This can be used to e.g. add reverse path filtering: # drop if not coming from the same interface packet # arrived on # nft add rule x prerouting fib saddr . iif oif eq 0 drop # accept only if from eth0 # nft add rule x prerouting fib saddr . iif oif eq "eth0" accept # accept if from any valid interface # nft add rule x prerouting fib saddr oif accept Querying of address type is also supported. This can be used to e.g. only accept packets to addresses configured in the same interface: # fib daddr . iif type local Its also possible to use mark and verdict map, e.g.: # nft add rule x prerouting meta mark set 0xdead fib daddr . mark type vmap { blackhole : drop, prohibit : drop, unicast : accept } Signed-off-by: Florian Westphal <fw@strlen.de>
* rt: introduce routing expressionAnders K. Pedersen2016-10-281-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce rt expression for routing related data with support for nexthop (i.e. the directly connected IP address that an outgoing packet is sent to), which can be used either for matching or accounting, eg. # nft add rule filter postrouting \ ip daddr 192.168.1.0/24 rt nexthop != 192.168.0.1 drop This will drop any traffic to 192.168.1.0/24 that is not routed via 192.168.0.1. # nft add rule filter postrouting \ flow table acct { rt nexthop timeout 600s counter } # nft add rule ip6 filter postrouting \ flow table acct { rt nexthop timeout 600s counter } These rules count outgoing traffic per nexthop. Note that the timeout releases an entry if no traffic is seen for this nexthop within 10 minutes. # nft add rule inet filter postrouting \ ether type ip \ flow table acct { rt nexthop timeout 600s counter } # nft add rule inet filter postrouting \ ether type ip6 \ flow table acct { rt nexthop timeout 600s counter } Same as above, but via the inet family, where the ether type must be specified explicitly. "rt classid" is also implemented identical to "meta rtclassid", since it is more logical to have this match in the routing expression going forward. Signed-off-by: Anders K. Pedersen <akp@cohaesio.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add offset attribute for numgen expressionLaura Garcia Liebana2016-10-271-0/+2
| | | | | | | | | | | | | Add support to add an offset to the numgen generated value. Example: ct mark set numgen inc mod 2 offset 100 This will generate marks with serie like 100, 101, 100, ... Signed-off-by: Laura Garcia Liebana <nevola@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: use new range expression for != [a,b] intervalsPablo Neira Ayuso2016-10-171-0/+29
| | | | | | | Use new range expression in the kernel to fix wrong bytecode generation. This patch also adjust tests so we don't hit problems there. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: fix compile error due to _UNTIL renamed to _MODULUS in libnftnlLiping Zhang2016-09-121-2/+2
| | | | | | | | | | | | | In the latest libnftnl, NFTNL_EXPR_NG_UNTIL was renamed to NFTNL_EXPR_NG_MODULUS, so compile error happened: netlink_linearize.c: In function ‘netlink_gen_numgen’: netlink_linearize.c:184:26: error: ‘NFTNL_EXPR_NG_UNTIL’ undeclared (first use in this function) Also update NFTA_NG_UNTIL to NFTA_NG_MODULUS. Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: refresh uapi/linux/netfilter/nf_tables.h copyPablo Neira Ayuso2016-08-261-1/+79
| | | | | | Fetch incremental incremental updates on this file. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add xt compat supportPablo Neira Ayuso2016-07-131-0/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At compilation time, you have to pass this option. # ./configure --with-xtables And libxtables needs to be installed in your system. This patch allows to list a ruleset containing xt extensions loaded through iptables-compat-restore tool. Example: $ iptables-save > ruleset $ cat ruleset *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -p tcp -m multiport --dports 80,81 -j REJECT COMMIT $ sudo iptables-compat-restore ruleset $ sudo nft list rulseset table ip filter { chain INPUT { type filter hook input priority 0; policy accept; ip protocol tcp tcp dport { 80,81} counter packets 0 bytes 0 reject } chain FORWARD { type filter hook forward priority 0; policy drop; } chain OUTPUT { type filter hook output priority 0; policy accept; } } A translation of the extension is shown if this is available. In other case, match or target definition is preceded by a hash. For example, classify target has not translation: $ sudo nft list chain mangle POSTROUTING table ip mangle { chain POSTROUTING { type filter hook postrouting priority -150; policy accept; ip protocol tcp tcp dport 80 counter packets 0 bytes 0 # CLASSIFY set 20:10 ^^^ } } If the whole ruleset is translatable, the users can (re)load it using "nft -f" and get nft native support for all their rules. This patch is joint work by the authors listed below. Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com> Signed-off-by: Pablo M. Bermudo Garay <pablombg@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* include: cache ip_tables.h, ip6_tables.h, arp_tables.h and ebtables.hPablo Neira Ayuso2016-07-139-1/+972
| | | | | | | | | The xt over nft support that comes in follow up patches need this, and update the corresponding Makefile.am. Based on patch from Arturo Borrero Gonzalez. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* nft: resync kernel header filesPatrick McHardy2016-04-242-5/+90
| | | | Signed-off-by: Patrick McHardy <kaber@trash.net>
* src: support limit rate over valuePablo Neira Ayuso2016-01-141-0/+6
| | | | | | | | | | | | | | | | | | 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>
* ct: add packet/byte counter supportFlorian Westphal2015-12-121-0/+2
| | | | | | | | | | | | | | | | | 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>
* payload: add payload statementPatrick McHardy2015-11-251-0/+17
| | | | | | | | | 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>
* src: add dup statement supportPablo Neira Ayuso2015-09-301-0/+14
| | | | | | | | | | 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>
* src: add per-bytes limitPablo Neira Ayuso2015-09-231-0/+9
| | | | | | | | | | 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>
* src: add netdev family supportPablo Neira Ayuso2015-06-161-0/+8
| | | | | | | | | | | | | | | | | | | | | 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>
* headers: sync headers for new register valuesPatrick McHardy2015-06-021-1/+33
| | | | Signed-off-by: Patrick McHardy <kaber@trash.net>
* nftables: add set statemetPatrick McHardy2015-04-121-0/+27
| | | | | | | | | | | | 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>
* setelem: add support for attaching comments to set elementsPatrick McHardy2015-04-121-0/+2
| | | | | | | | Syntax: # nft add element filter test { 192.168.0.1 comment "some host" } Signed-off-by: Patrick McHardy <kaber@trash.net>
* setelem: add timeout support for set elementsPatrick McHardy2015-04-121-0/+4
| | | | | | | | | | | | | | | | | | | | | | 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>
* set: add timeout support for setsPatrick McHardy2015-04-121-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | 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>
* build: autotools conversionPablo Neira Ayuso2014-11-122-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* src: Add cgroup support in meta expresionAna Rey2014-11-101-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | 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>
* include: refresh cached copy of nf_tables.hPablo Neira Ayuso2014-11-101-4/+20
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add nat persistent and random optionsArturo Borrero2014-10-092-2/+72
| | | | | | | | | | | | | | | | | 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>
* nft: complete reject supportAlvaro Neira2014-10-091-0/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 | | 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>
* mnl: consistency checks across several netlink dumpsPablo Neira Ayuso2014-09-191-0/+16
| | | | | | | | | | | | 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>
* include: refresh include/linux/nf_tables.h cached copyPablo Neira Ayuso2014-09-111-3/+58
| | | | | | | | | 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>
* src: Add devgroup support in meta expresionAna Rey2014-09-031-0/+4
| | | | | | | | | | | | | | | | | | | 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>
* src: Add support for cpu in meta expresionAna Rey2014-08-241-0/+2
| | | | | | | | | | | | | 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>
* src: Add support for pkttype in meta expresionAna Rey2014-08-241-0/+2
| | | | | | | | | | | | | | | 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>
* meta: Add support for input and output bridge interface nameTomasz Bursztyka2014-04-241-0/+4
| | | | | | | | 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>
* ct: connlabel matching supportFlorian Westphal2014-02-181-0/+2
| | | | | | | | | | | 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>
* include: resync nftables.h with kernelPatrick McHardy2014-01-082-23/+115
| | | | Signed-off-by: Patrick McHardy <kaber@trash.net>
* src: add support for queueEric Leblond2014-01-041-0/+20
| | | | | | | | | | | 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>
* include: cache a copy of nfnetlink.hTomasz Bursztyka2013-09-301-0/+64
| | | | | | | | | | | | | | | | | | | | 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>
* src: get it sync with current include/linux/netfilter/nf_tables.hPablo Neira Ayuso2013-06-241-4/+44
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* add support for new set API and standalone setsPatrick McHardy2009-07-281-53/+321
| | | | Signed-off-by: Patrick McHardy <kaber@trash.net>
* ct: resync netlink header and properly add ct l3protocol supportPatrick McHardy2009-03-311-3/+4
| | | | Signed-off-by: Patrick McHardy <kaber@trash.net>
* Initial commitv0.01-alpha1Patrick McHardy2009-03-189-0/+826
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