Building from source

1. Prepare kernel source code from source rpm.

$ rpm -i http://vault.centos.org/7.9.2009/updates/Source/SPackages/kernel-3.10.0-1160.95.1.el7.src.rpm
$ yum-builddep ~/rpmbuild/SPECS/kernel.spec
$ rpmbuild -bp ~/rpmbuild/SPECS/kernel.spec

2. Go to linux source directory and compile pktgen modules.

$ cd ~/rpmbuild/BUILD/kernel-3.10.0/linux-3.10.0-957.x86_64
$ make -C /lib/modules/$(uname -r)/build M=$(pwd)/net/core modules

3. Install pktgen modules.

$ insmod ./net/core/pktgen.ko
$ dmesg | grep pktgen
[83003.544038] pktgen: Packet Generator for packet performance testing. Version: 2.75

Helper include files

This directory contains two helper shell files, that can be "included" by shell source'ing. Namely "functions.sh" and "parameters.sh".

Common parameters

The parameters.sh file support easy and consistant parameter parsing across the sample scripts. Usage example is printed on errors::

 Usage: ./pktgen_sample01_simple.sh [-vx] -i ethX
  -i : ($DEV)       output interface/device (required)
  -s : ($PKT_SIZE)  packet size
  -d : ($DEST_IP)   destination IP
  -m : ($DST_MAC)   destination MAC-addr
  -t : ($THREADS)   threads to start
  -f : ($F_THREAD)  index of first thread (zero indexed CPU number)
  -c : ($SKB_CLONE) SKB clones send before alloc new SKB
  -n : ($COUNT)     num messages to send per thread, 0 means indefinitely
  -b : ($BURST)     HW level bursting of SKBs
  -v : ($VERBOSE)   verbose
  -x : ($DEBUG)     debug

The global variable being set is also listed. E.g.the required interface/device parameter "-i" sets variable $DEV.