| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
Allow to collect rx stats for multiple pcap mode, by storing
them in separated variables before switch to the next pcap file.
It allows to have the one approach when dump for single or multiple
pcap(s) mode.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
This work adds packet fanout support to netsniff-ng. Multiple netsniff-ng
instances can join the same fanout group with a particular id in order to
improve scaling.
Based on different fanout disciplines, e.g. distribute to fanout member
by packet hash, round-robin, by arrival cpu, by random, by socket rollover
(if one members socket queue is full, switch to next one, etc), by hardware
queue mapping, traffic can be distributed to one of the fanout members.
Moreover, we also allow the user to specify additional aux arguments, e.g.
whether to defrag incoming traffic for the fanout group or not, and whether
to roll over a socket in case other disciplines than socket rollover have
been used. All that is configurable via command line option.
Signed-off-by: Michał Purzyński <michalpurzynski1@gmail.com>
[ dbkm made some bigger changes to get this upstream ready ]
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
|
|
It's HAVE_TPACKET3, not HAVE_TPACKETV3.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
Some older systems (e.g. RHEL 6) don't have tpacket v3 available, but
only tpacket v2. However, since commit d8cdc6a ("ring: netsniff-ng:
migrate capture only to TPACKET_V3") we solely rely on tpacket v3 for
capturing packets.
This patch restores the possibility to capture using tpacket v2. For now
this is just a fallback if the configure script doesn't detect tpacket
v3 (and thus HAVE_TPACKET3 isn't set). Thus, on most modern systems this
shouldn't change anything and they will continue using tpacket v3.
For now this fix contains quite a bit of ugly #ifdefery which should be
cleaned up in the future.
Fixes #76
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
Instead of having to perform the individual steps to initialize a ring
and open coding them in multiple places, provide convenience functions
to do all at once. This has the nice side effect of allowing to make
most of these *_{rx,tx}_ring() functions static in their respective
module.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
Change type of verbose flag from int to bool.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
The mm_len member of struct ring is of type size_t, but in the code
paths leading to set it, unsigned int is used. In circumstances where
unsigned int is 32 bit and size_t is 64 bit, this could lead to an
integer overflow, which causes an improper ring size being mmap()'ed in
mmap_ring_generic().
In order to prevent this, consistently use size_t to store the ring
size, since this is also what mmap() takes as its `length' parameter.
This now allows to specify ring sizes larger than 4 GiB for both
netsniff-ng and trafgen (fixes #90).
Reported-by: Jon Schipp <jonschipp@gmail.com>
Reported-by: Michał Purzyński <michalpurzynski1@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
These are not needed in the headers themselves and are pulled in in the
.c file where necessary.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
|
In netsniff-ng, we use tpacketv3 for capturing-only mode. The issue
observed lately is that when using f.e. -n10 or capturing a pcap and
then quitting, the pcap or actually seen number of packets are less
than what the statistics tell us from getsockopt(2).
This is due to the fact that tpacketv3 divides its ring buffer into
blocks of frames. Meaning, while we are traversing block n, the kernel
already fills up block n+1 and following if new packets arrive. While
doing so, it increments packet counters. Thus, when we ^C, we haven't
seen those blocks, so the stats tell us mostly a slightly higher
result. Fix this by adjusting socket stats printing to this fact.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
Finally eliminate xutils.{c,h} and move the rest to epoll2.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
We need to carry frame_count through multiple calls of walk function
to account correctly for --num <pkts>. Also, move socket stats printing
into rx ring, since it belongs there.
Todo: the kernel socket seems to have a different count that what we
see. This needs to be fixed one way or the other. Not yet sure what's
causing this.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
Prepare TPACKET_V3 for allowing to transparently setting up the
frame structure such that we do not need to change much in the
netsniff-ng/trafgen code.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
Implement ring setup routines and structures for TPACKET_V3.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
There's no good reason why we currently waste an 'int' for
jumbo_support while this must better be done as 'bool'.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
Prepare setup_rx_ring_layout for both, v2 and v3. Also do some checks
during compile time if offsets stay the same as we operate on different
union mappings.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
Prepare and add some structures an helper functions for TPACKET_V3.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
|
|
We decided to get rid of the old Git history and start a new one for
several reasons:
*) Allow / enforce only high-quality commits (which was not the case
for many commits in the history), have a policy that is more close
to the one from the Linux kernel. With high quality commits, we
mean code that is logically split into commits and commit messages
that are signed-off and have a proper subject and message body.
We do not allow automatic Github merges anymore, since they are
total bullshit. However, we will either cherry-pick your patches
or pull them manually.
*) The old archive was about ~27MB for no particular good reason.
This basically derived from the bad decision that also some PDF
files where stored there. From this moment onwards, no binary
objects are allowed to be stored in this repository anymore.
The old archive is not wiped away from the Internet. You will still
be able to find it, e.g. on git.cryptoism.org etc.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
|
