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Since Linux 3.14, the kernel supports a socket option PACKET_QDISC_BYPASS,
which trafgen enables by default. That allow us to bypass the kernels
normal qdisc (traffic control) layer.
An option -q, --qdisc-path is added to allow enabling the qdisc path
explicity, useful for testing purposes.
This will be avail in kernels >= 3.14 via
commit d346a3fae3 (packet: introduce PACKET_QDISC_BYPASS socket option).
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
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Also make these options available to trafgen.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Add ability to set IGP in time units in seconds, milliseconds,
microseconds, and nanoseconds by appending a postfix to --gap e.g. --gap
100ms. Also, update the man page and trafgen.zsh to reflect the
changes.
[Fix whitespaces, coding style and minor wording changes -- tklauser]
Signed-off-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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In all the tools' man pages the synopsis line is indented by one space
with respect to the text in the sections above and below. Remove the
space to have consistent alignment.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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For systems with >8 CPUs it might be i) annoying or ii) uninteresting
to print CPU time statistics. So introduce a switch that can skip this
at exit.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Add a colophon to the end of each man page.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Took quite a while to git bisect the cause for the wrong TCP checksum
in the -e example. It turned out that commit bf43e1993c7037 ("trafgen:
lexer: return original string if no shellcode") "broke" it, since
before that commit the TCP checksum from -e example was correct and
afterwards not anymore. Well, it didn't break it. What was happening
here is that with this fix above, the packet got 1 byte longer since
the first character of the example string is not omitted anymore,
therefore the checksum got wrong. Fix this by fixing the IP total
length of the packet in the -e and man page example. The UDP example
from the man page still works well if csumudp() is used, so not
affected of this.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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That's the last man page where `` occurs, so fix this up by making it
consistentlt '' as the rest of all man pages.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Some fixes all over, part 1.
Signed-off-by: Kartik Mistry <kartik@debian.org>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Minor change in BUGS section to bring it up to date.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Signed-off-by: Jon Schipp <jonschipp@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Replace "on default" by "by default", make it a bit more clear what the
seed in the -E/--seed option is for and mention exit after display of
information on --version and --help.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Add complete description of the commandline option -p/--cpp to the
manpage.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Also update examples for the man-page.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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Only have Makefile specific folders in the project root where the
binaries are stored, the rest should be part of the repository root.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
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