Include logging.{h,c} from xdp-tools so utilities can use them for setting
libxdp and libbpf logging.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Use a JSON-writer library from iproute instead of complicated printf
statement. Also output timestamp, rtt and min_rtt as integers in
nanoseconds, rather than floats in seconds.
Signed-off-by: Simon Sundberg <simon.sundberg@kau.se>
Add the directory and Makefile rules to prepare for storing library
functions in lib/util like we do in xdp-tools. With this, library code can
be added by just dropping the .c and .h into lib/util and updating
lib/util/util.mk with the object name.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
