src: udp_flood fix result output

The TSC is clock-cycles not nanosec.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
src: udp_flood is more correct to use IPPROTO_IP

Its more correct to use IPPROTO_IP in socket() call eventhough
that IPPROTO_IP == 0.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
src: Makefile add cscope target

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
src: udp_flood add proper usage info on parameter issues

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
src: udp_flood implement sendmsg() sending

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>