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* xtables-compat: check if nft ruleset is compatiblePablo M. Bermudo Garay2016-08-261-0/+5
| | | | | | | | | | | | | This patch adds a verification of the compatibility between the nft ruleset and iptables. Nft tables, chains and rules are checked to be compatible with iptables. If something is not compatible, the execution stops and an error message is displayed to the user. This checking is triggered by xtables-compat -L and xtables-compat-save commands. Signed-off-by: Pablo M. Bermudo Garay <pablombg@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* iptables-compat: use new symbols in libnftnlPablo Neira Ayuso2015-09-161-1/+1
| | | | | | | | | Adapt this code to use the new symbols in libnftnl. This patch contains quite some renaming to reserve the nft_ prefix for our high level library. Explicitly request libnftnl 1.0.5 at configure stage. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* consistently use <errno.h>Felix Janda2015-05-021-1/+1
| | | | | | | | | On glibc, <sys/errno.h> is a synomym for <errno.h>. <errno.h> is specified by POSIX, so use that. Fixes compilation error with musl libc Signed-off-by: Florian Westphal <fw@strlen.de>
* iptables-save: actually parse -M/--modprobe optionJiri Popelka2014-03-171-1/+1
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* iptables-{save,restore}: warn that -b/--binary isn't implementedJiri Popelka2014-03-171-0/+3
| | | | | | see also 296dca39be Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* nft-compat: fix wrong protocol context in initializationPablo Neira Ayuso2014-02-111-2/+1
| | | | | | | | | | | | This fixes matches/targets that are dependent on that IPv4/Ipv6 context, eg. # ip6tables-compat -I INPUT -j REJECT --reject-with icmp6-addr-unreachable # ip6tables-compat-save ... -A INPUT -j REJECT --reject-with icmp6-port-unreachable Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables: add xtables-compat-multi for the nftables compatibility layerPablo Neira Ayuso2014-02-041-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch should allow distributors to switch to the iptables over nftables compatibility layer in a transparent way by updating symbolic links from: lrwxrwxrwx 1 root root 13 feb 4 15:35 iptables -> xtables-multi to: lrwxrwxrwx 1 root root 13 feb 4 15:35 iptables -> xtables-compat-multi Same thing with iptables-save, iptables-restore, ip6tables, ip6tables-save, ip6tables-restore and arptables. Note that, after this patch, the following new symlinks are installed: * iptables-compat * iptables-compat-save * iptables-compat-restore * ip6tables-compat * ip6tables-compat-save * ip6tables-compat-restore * arptables-compat which point to the new binary xtables-compat-multi. The idea is to keep both native and compatibility tools installed in the system, which should also make it easier for testing purposes. The iptables over nftables compatibility layer is enabled by default and it requires the libmnl and libnftnl libraries. If you don't want to compile the compatibility layer, you can still disable it through --disable-nftables. This patch also includes changes to adapt the existing code to this approach. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* nft: Use new libnftnl library name against former libnftablesTomasz Bursztyka2014-01-201-1/+1
| | | | | | | Adapt the current code to use the new library name libnftnl. Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables: Do not dump before command parsing has been finishedTomasz Bursztyka2013-12-301-2/+8
| | | | | | | | On xtables-save.c, -d will not output right away but after the full command line hase been parsed. Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* nft: associate table configuration to handle via nft_initGiuseppe Longo2013-12-301-1/+1
| | | | | | | | | We need family dependent built-in table/chain configuration. This patch is a step forward making nft family independent in order to support arptables and ebtables compatibility layers. Signed-off-by: Giuseppe Longo <giuseppelng@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables: fix missing afinfo configurationPablo Neira Ayuso2013-12-301-0/+1
| | | | | | | I noticed that the iprange match in IPv6 was broken, fix it by overriding the default family (IPv4) if -6 is passed. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables: do not proceed if nft_init failsPablo Neira Ayuso2013-12-301-1/+7
| | | | | | | Fix a crash if nft_init fails, it happens if nfnetlink support is not available in your Linux kernel. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables-save: add -4 and -6 supportPablo Neira Ayuso2013-12-301-1/+9
| | | | | | | | | | Now you can specify: xtables-save -6 > my-ip6tables-ruleset to dump the IPv6 rule-set. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xtables: add IPv6 supportTomasz Bursztyka2013-12-301-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary of changes to add IPv6 support to the xtables utility: * modify all commands (add, delete, replace, check and listing) to support IPv6 addresses. And for the internal nft library: * add family to struct nft_handle and modify all caller to use this family instead of the hardcoded AF_INET. * move code that we can re-use for IPv4 and IPv6 into helper functions. * add IPv6 rule printing support. * add support to parse IPv6 address. Pablo added several improvements to this patch: * added basic xtables-save and xtables-restore support (so it defaults to IPv4) * fixed a couple of bugs found while testing * added reference when -f is used to point to -m frag (until we can make this consistent with IPv4). Note that we use one single xtables binary utility for IPv4 and IPv6. Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* use nf_tables and nf_tables compatibility interfacePablo Neira Ayuso2013-12-301-0/+122
This patch adds the following utilities: * xtables * xtables-restore * xtables-save * xtables-config They all use Patrick's nf_tables infrastructure plus my compatibility layer. xtables, xtables-restore and xtables-save are syntax compatible with ip[6]tables, ip[6]tables-restore and ip[6]tables-save. Semantics aims to be similar, still the main exception is that there is no commit operation. Thus, we incrementally add/delete rules without entire table locking. The following options are also not yet implemented: -Z (this requires adding expr->ops->reset(...) so nft_counters can reset internal state of expressions while dumping it) -R and -E (this requires adding this feature to nf_tables) -f (can be implemented with expressions: payload 6 (2-bytes) + bitwise a&b^!b + cmp neq 0) -IPv6 support. But those are a matter of time to get them done. A new utility, xtables-config, is available to register tables and chains. By default there is a configuration file that adds backward compatible tables and chains under iptables/etc/xtables.conf. You have to call this utility first to register tables and chains. However, it would be possible to automagically register tables and chains while using xtables and xtables-restore to get similar operation than with iptables. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>