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Move those functions out so that they can be more easily maintained
in its separate file.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Lets migrate capturing to TPACKET_V3, since it will bring a better
performance due to fewer page cache misses caused by a higher density
of packets, since now they are contigous placed in the ring buffer.
It is said that TPACKET_V3 brings the following benefits:
*) ~15 - 20% reduction in CPU-usage
*) ~20% increase in packet capture rate
*) ~2x increase in packet density
*) Port aggregation analysis
*) Non static frame size to capture entire packet payload
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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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>
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We do not want to maintain duplicate code, so move this into a separate
file and name those *_generic() helpers.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Arg, this was a leftover when copying the other function. So fix it!
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Implement ring setup routines and structures for TPACKET_V3.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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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>
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Prepare and add some structures an helper functions for TPACKET_V3.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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It rather belongs to built_in.h, and not here.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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We only use it once and nowhere else, so just replace the correct
value right away.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Add set_sockopt_tpacket_v3() in preparation for TPACKET_V3.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Rename it to set_sockopt_tpacket_v2 so that we later on can also
add other versions and have it clearly stated which one we use.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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We currently do not support it, so do not keep it here.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Break out the timestamping part of the ring.h file, since it's not
directly related to the {t,r}x_ring. Also inlining doesn't make
sense here.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Set TX timestamping to HWTSTAMP_TX_OFF. We do not use it, therefore
do not waist time keeping track of it.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Hw timestaming is currently done, if we have the header file from
the kernel available. If it fails, we currently bail out, which is
bullshit. Just returning is enough, since some users might have the
header available, but not a NIC supporting hw timestaming.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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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>
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