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It provides malloc()/free(), which is so basic that we need it
everywhere. Include via <nft.h>.
The ultimate purpose is to define more things in <nft.h>. While it has
not corresponding C sources, <nft.h> can contain macros and static
inline functions, and is a good place for things that we shall have
everywhere. Since <stdlib.h> provides malloc()/free() and size_t, that
is a very basic dependency, that will be needed for that.
Signed-off-by: Thomas Haller <thaller@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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<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>
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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>
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If the link target length exceeds 'sizeof(tmp)' bytes, readlink() will
return 'sizeof(tmp)'. Using this value as index is illegal.
Original update from Phil, for the conntrack-tools tree, which also has
a copy of this function.
Fixes: 6d085b22a8b5 ("table: support for the table owner flag")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Add new flag to allow userspace process to own tables: Tables that have
an owner can only be updated/destroyed by the owner. The table is
destroyed either if the owner process calls nft_ctx_free() or owner
process is terminated (implicit table release).
The ruleset listing includes the program name that owns the table:
nft> list ruleset
table ip x { # progname nft
flags owner
chain y {
type filter hook input priority filter; policy accept;
counter packets 1 bytes 309
}
}
Original code to pretty print the netlink portID to program name has
been extracted from the conntrack userspace utility.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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