| Commit message (Collapse) | Author | Age | Files | Lines |
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We currently use strncpy in a bunch of places which has this weird quirk
where it doesn't write a terminating null byte if the input string is >=
the max length. To mitigate this we write a null byte to the last character
manually.
While this works it is easy to forget. Instead we should just be using
snprintf which has more sensible behaviour as it always writes a null byte
even when truncating the string.
Signed-off-by: Daniel Gröber <dxld@darkboxed.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Changes in the netlink attribute layout is considered to be a kernel ABI
breakage, so report this immediately and stop execution, instead of lazy
error back to the client application, which cannot do anything with
this.
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 the front-end to the recent ctnetlink interface
changes that add the zone attribute into the tuple.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp>
Signed-off-by: Florian Westphal <fw@strlen.de>
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Signed-off-by: Felix Janda <felix.janda@posteo.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Substract the netlink + nfnetlink headers to pass the payload length
to nfct_payload_parse().
Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Can't be zero, it was already tested.
Signed-off-by: Florian Westphal <fw@strlen.de>
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allows to set/clear only a subset of the in-kernel label set, e.g.
"set bit 1 and do not change any others".
Signed-off-by: Florian Westphal <fw@strlen.de>
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adds new labelmap api to create a name <-> bit mapping
from a text file (default: /etc/xtables/connlabel.conf).
nfct_labelmap_new(filename) is used to create the map,
nfct_labelmap_destroy() releases the resources allocated for the map.
Two functions are added to make map lookups:
nfct_labelmap_get_name(map, bit) returns the name of a bit,
nfct_labelmap_get_bit returns the bit associated with a name.
The connlabel attribute is represented by a nfct_bitmask object, the
nfct_bitmask api can be used to test/set/get individual bits
("labels").
The exisiting nfct_attr_get/set interfaces can be used to read or
replace the existing labels associated with a conntrack with a new set.
Signed-off-by: Florian Westphal <fw@strlen.de>
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This adds the ATTR_HELPER_INFO that can be used to send binary data
that will be attached to the conntrack. This is useful for the
user-space connection tracking support.
This patch also adds a new interface:
nfct_set_attr_l(attr, type, value, length);
that is used to set the variable length helper information.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds support to build and to parse netlink messages
from/to one user-space nf_conntrack object. It uses libmnl, thus
libnetfilter_conntrack now depends on this library.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds support to build and to parse netlink messages
from/to one user-space nf_conntrack object. It uses libmnl, thus
libnetfilter_conntrack now depends on this library.
This is the first patch in the direction of removing the dependency
on the veteran libnfnetlink.
I have decided to update LIBVERSION in this patch. I know it's
recommended to do this before releasing the software. I prefer to
do this so snapshot packages get the correct LIBVERSION.
Signed-off-by: Pablo Neira Ayuso <pablo@gnumonks.org>
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