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This patch adds the NetlinkEventsReliable clause, this is useful
to turn on reliable Netlink event delivery. This features
requires a Linux kernel >= 2.6.31.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With this patch, we reset the event iteration limit counter after
we have performed an event handling run. Thus, every run loop
always performs a maximum of EventIterationLimit event handling
instead of keeping the old credits for the next run loop.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With this patch, a) we set the file descriptors for the
synchronization channels as non-blocking, b) we perform more than
one recv() call per select() signal on the socket and c) we limit
the iteration to the value that EventIterationLimit has set.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch reworks the commit phase to avoid the forking. This is
particularly useful in active-active setups in which one node
has to commit the external cache while it is receiving new entries
to be added in the external cache. This results in really high
commit times due to the penalty of the copy-on-write that fork
performs.
The default number of steps in one run loop is limited to 64 by now.
No option to tune this parameter is still available via the
configuration file.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds cache_iterate_limit() and hashtable_iterate_limit()
that allows to limit the iteration to given a number of states.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the LOCAL_RET_* return values. The return value
LOCAL_RET_STOLEN which allows to leave a client socket open while
waiting for an operation to finish.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch updates the library version requirements.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch bumps conntrack-tools version to 0.9.13.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This is an update to commit 575fc906a302599cb9afeb136096dfd96bb57b17.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch fixes an incorrect use of nfct_get_attr_u32() instead of
nfct_get_attr_u8() to obtain the current TCP state. This patch also
sets the IP_CT_TCP_FLAG_CLOSE_INIT for states >= TIME_WAIT.
The function nl_update_conntrack() is currently unused so this fix
does not resolve any pending issue.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch fixes a memory leak in cache_update_force(). The problem
occurs if the object does not exists in the cache and we fail to
add it.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds a new statistic field to count the number of
enospc errors while adding new nodes to some queue.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the statistics for queue node objects.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch re-introduces `-s queue' but now it displays generic
queue statistics.
# conntrackd -s queue
active queue objects: 0
queue txqueue:
current elements: 0
maximum elements: 2147483647
not enough space errors: 0
queue rsqueue:
current elements: 72
maximum elements: 128
not enough space errors: 0
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the name field to identify the queue by means of
a string. This patch is used by the next one that introduces
per-queue statistics.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch renames the statistics option that displays the content
of the resend queue which is used by the ftfw mode.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In 400ae54438c4b85126f9fab0ae1dc067823b70f7, we added the SCTP
support by means of a structure that was encapsulated in an
TLV attribute. However, this structure didn't handle alignment
and endianess issues appropriately. Similar problem was
introduced in b808645ec71b7cc22cf5106b3d79625d07e6077c along
with the DCCP support.
This patch moves every field of this structure to independent
attributes. I decided not to use nesting to make building and
parsing more simple.
Using TLV is a good idea, specially for DCCP and SCTP that are
under development and that may include new fields and obsolete
them in the future.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds the ability to dump the list of existing child
processes. In general, it would be hard to display one since
child processes are generally forked for very specific tasks,
like commit and flush operations, and they have very limited
lifetime. However, this can be handy for debugging problems.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds a dedicated commit handler since there is a possible
race condition that can happen if the child process ends before we
have received all the event messages that the commit request has
triggered.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In 6f5666a29cb7cbff08ce926ee1edb84a311ff6ee, I moved the flush
operation into a child process and to use a disposable handler
to perform flush requests. This patch adds a dedicated flush
handler since there is a possible race condition that can
happen if the child process ends before we have received all
the event messages that the flush request has triggered.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch allows to limit the number of simultaneous child processes.
This is required by the next patch that replaces disposable handlers
to commit and flush with permanent handlers.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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A child process may finish while we are walking on the process list.
This fixes possible concurrency problems.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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In 0374398fd14bf587d80d9d31e361e266e69387c8, I introduced the process
infrastructure. However, that patch missed the PID initialization.
Without this patch, the process structures are never released.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch is a cleanup, it removes an unused nfct handler. This
removal is due to recent commits that has obsolete it.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Thomas Jarosch doesn't like having out-dated information in
the tree. Me neither. However, I didn't notice that this file
has been including in every release, it seems that the
autostuff magically includes if present.
Reported-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Otherwise autoreconf fails like this:
aclocal: couldn't open directory `m4': No such file or directory
autoreconf: aclocal failed with exit status: 1
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch removes a reminiscent of the lifetime cache feature.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch is a cleanup, it removes a redudant declaration in the
parser.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch removes the cache write-through clause. This feature
remained undocumented although some has found it looking at the
source code. This feature has remained in the tree for quite
some time although it has several limitations. Moreover, it
is specifically broken and dangerous for Linux kernels >= 2.6.29
since it generates loops in the synchronization.
We do this removal first to prepare the introduction of a feature
to bypass the external cache.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With this patch, the flush operation is performed by a child process.
Thus, the parent process digests destroy events that ctnetlink reports
back and, thanks to the origin infrastructure, we skip the messy
implicit synchronization that are triggered by such events.
This patch requires a Linux kernel >= 2.6.29 to benefit from this
change, otherwise it has no effect.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Since Linux kernel 2.6.29, ctnetlink reports the changes that have
been done using ctnetlink. With this patch, conntrackd can recognize
who is the origin of the event messages. For example, this is
interesting to avoid a messy implicit bulk send during the commit
of entries.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds a simple infrastructure that allows to account
the child processes that have been forked. This also includes
a callback handler that can be registered that is called once
the child process finishes.
We can extended this later to include an alarm to limit the
maximum lifetime of a forked child process. This is good to
ensure that child processes behave timely.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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Signed-off-by: Samuel Gauthier <samuel.gauthier@6wind.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds initial support for DCCP state replication.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds `--role' parameter for DCCP which is required to
create entries.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds initial support for SCTP state replication.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds GRE support for the command line tool conntrack.
With this patch, we support all protocols available in the kernel.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.
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This patch fixes an English typo in an output message.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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With this patch, you can change the scheduler policy and priority
for conntrackd. Using a RT scheduler policy reduces the chances to
hit ENOBUFS in Netlink.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds DCCP support for the command line tool conntrack.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds SCTP support to the command line tool conntrack.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch adds UDPlite support for the command line tool conntrack.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch extends the generic_opt_check() function to add
extra information on the possible option combinations. Under
some specific situations, like the creation and getting of
a conntrack, you may specify the original or the reply tuple
but at least one MUST be present. This handling has been
always tricky, it still remains but we're more user friendly
at least.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch saves one extra indent in the switch().
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch also removes a new line that is not required in the
error message.
# conntrack -L -p tcp --state CLOS
conntrack v0.9.12 (conntrack-tools): Unknown TCP state CLOS
> empty line <
Try `conntrack -h' or 'conntrack --help' for more information.
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This patch is a cleanup, it removes a hardcoded iteration in the
TCP support.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch removes a couple of constants that have no clients in
the conntrackd code.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch bumps conntrack-tools version to 0.9.12 to prepare the
release.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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This patch cleans up the error reporting.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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