Simon Sundberg 93b6c0eafa pping: Major refactor and add -f and -c options ...

Merge the pping_kern_tc.c, pping_kern_xdp.c and pping_helpers.h into
the single file pping_kern.c. Do not change any of the BPF code,
except renaming the map ts_start to packet_ts.

To handle both BPF programs kept in single ELF-file, change loading
mechanism to extract and attach both tc and XDP programs from it. Also
refactor main-method into several smaller functions to reduce its
size.

Finally, added the --force (-f) and --cleanup-interval (-c) options to
the argument parsing, and improved the parsing of the
--rate-limit (-r) option.

NOTE: The verifier rejects program in it's current state as too
large (over 1 million instructions). Setting the TCP_MAX_OPTIONS in
pping_kern.c to 5 (or less) solves this. Unsure at the moment what
causes the verifier to think the program is so large, as the code in
pping_kern.c is identical to the one from the three files it was
merged from.

Signed-off-by: Simon Sundberg <simon.sundberg@kau.se>

2021-04-15 14:13:54 +02:00

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