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* include: include <string.h> in <nft.h>Thomas Haller2023-09-281-1/+0
| | | | | | | | <string.h> provides strcmp(), as such it's very basic and used everywhere. Signed-off-by: Thomas Haller <thaller@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: add <nft.h> header and include it as firstThomas Haller2023-08-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | <config.h> is generated by the configure script. As it contains our feature detection, it want to use it everywhere. Likewise, in some of our sources, we define _GNU_SOURCE. This defines the C variant we want to use. Such a define need to come before anything else, and it would be confusing if different source files adhere to a different C variant. It would be good to use autoconf's AC_USE_SYSTEM_EXTENSIONS, in which case we would also need to ensure that <config.h> is always included as first. Instead of going through all source files and include <config.h> as first, add a new header "include/nft.h", which is supposed to be included in all our sources (and as first). This will also allow us later to prepare some common base, like include <stdbool.h> everywhere. We aim that headers are self-contained, so that they can be included in any order. Which, by the way, already didn't work because some headers define _GNU_SOURCE, which would only work if the header gets included as first. <nft.h> is however an exception to the rule: everything we compile shall rely on having <nft.h> header included as first. This applies to source files (which explicitly include <nft.h>) and to internal header files (which are only compiled indirectly, by being included from a source file). Note that <config.h> has no include guards, which is at least ugly to include multiple times. It doesn't cause problems in practice, because it only contains defines and the compiler doesn't warn about redefining a macro with the same value. Still, <nft.h> also ensures to include <config.h> exactly once. Signed-off-by: Thomas Haller <thaller@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: Add GPLv2+ header to .c files of recent creationPablo Neira Ayuso2023-01-021-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch comes after a proposal of mine at NFWS 2022 that resulted in agreement to license recent .c files under GPLv2+ by the attendees at this meeting: - Stefano Brivio - Fernando F. Mancera - Phil Sutter - Jozsef Kadlecsik - Florian Westphal - Laura Garcia - Arturo Borrero - Pablo Neira It has already happened that one of the external library dependencies was moved to GPLv3+ (libreadline), resulting in a change to libedit by default in b4dded0ca78d ("configure: default to libedit for cli"). I have added the GPLv2+ header to the following files: Authors ------- src/cmd.c Pablo src/fib.c Florian src/hash.c Pablo src/iface.c Pablo src/json.c Phil + fixes from occasional contributors src/libnftables.c Eric Leblond and Phil src/mergesort.c Elise Lenion src/misspell.c Pablo src/mnl.c Pablo + fixes from occasional contributors src/monitor.c Arturo src/numgen.c Pablo src/osf.c Fernando src/owner.c Pablo src/parser_json.c Phil + fixes from occasional contributors src/print.c Phil src/xfrm.c Florian src/xt.c Pablo Eric Leblond and Elise Lennion did not attend NFWS 2022, but they acknowledged this license update already in the past when I proposed this to them in private emails. Update COPYING file too to refer that we are now moving towards GPLv2 or any later. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xfrm: spi is big-endianFlorian Westphal2020-01-141-1/+1
| | | | | | | the kernel stores spi in a __be32, so fix up the byteorder annotation. Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
* xfrm: add parse and build userdata interfacePablo Neira Ayuso2019-12-171-0/+61
| | | | | | | Add support for meta userdata area. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Florian Westphal <fw@strlen.de>
* src: expr: remove expr_ops from struct exprFlorian Westphal2019-02-081-2/+2
| | | | | | | | size of struct expr changes from 144 to 128 bytes on x86_64. This doesn't look like much, but large rulesets can have tens of thousands of expressions (each set element is represented by an expression). Signed-off-by: Florian Westphal <fw@strlen.de>
* src: add ipsec (xfrm) expressionMáté Eckl2018-09-211-0/+120
This allows matching on ipsec tunnel/beet addresses in xfrm state associated with a packet, ipsec request id and the SPI. Examples: ipsec in ip saddr 192.168.1.0/24 ipsec out ip6 daddr @endpoints ipsec in spi 1-65536 Joint work with Florian Westphal. Cc: Máté Eckl <ecklm94@gmail.com> Signed-off-by: Florian Westphal <fw@strlen.de>