[v2,00/15] add packet generator library and example app

  V2
  - Add UDP protocol support
  - Add VXLAN protocol support
  - Removed gen/packet telemetry function as it was unimplemented
  - Fixed IPv4 endianness issue

As I am coming to the end of my internship I will now longer be working on this
project. As discussed on the thread [1] this patchset will be marked
non-applicable on patchwork. We are posting the V2 here to make the rework
publicly available.
  - Ronan

[1] DPDK Mailing list discussion around Gen library upstreaming;
http://mails.dpdk.org/archives/dev/2022-January/232845.html


This patchset introduces a Gen library for DPDK. This library provides an easy
way to generate traffic in order to test software based network components.

This library enables the basic functionality required in the traffic generator.
This includes: raw data setting, packet Tx and Rx, creation and destruction of a
 Gen instance and various types of data parsing.
This functionality is implemented in "lib/gen/rte_gen.c". IPv4 parsing
functionality is also added in "lib/net/rte_ip.c", this is then used in the gen
library.

A sample app is included in "examples/generator" which shows the use of the gen
library in making a traffic generator. This can be used to generate traffic by
running the dpdk-generator generator executable. This sample app supports
runtime stats reporting (/gen/stats) and line rate limiting
(/gen/mpps,<target traffic rate in mpps>) through telemetry.py.

As more features are added to the gen library, the sample application will
become more powerful through the "/gen/packet" string parameter
(currently supports IP and Ether address setting). This will allow every
application to generate more complex traffic types in the future without
changing API.

Harry van Haaren (6):
  gen: add files for initial traffic generation library
  gen: add basic Rx and Tx routines and tests
  gen: add raw packet data API and tests
  gen: add parsing infrastructure and Ether protocol
  gen: add gen IP parsing
  examples/generator: import code from basicfwd.c

Ronan Randles (9):
  net: add string to IPv4 parse function
  net: add function to pretty print IPv4
  examples/generator: enable gen library for traffic gen
  examples/generator: telemetry support
  examples/generator: link status check added
  examples/generator: line rate limiting
  gen: add UDP support
  net/vxlan: instance flag endianness refactored
  gen: add VXLAN support

 app/test/meson.build           |   4 +
 app/test/test_gen.c            | 186 +++++++++
 app/test/test_net.c            |  87 +++++
 doc/api/doxy-api-index.md      |   3 +-
 doc/api/doxy-api.conf.in       |   1 +
 examples/generator/main.c      | 470 ++++++++++++++++++++++
 examples/generator/meson.build |  13 +
 examples/meson.build           |   1 +
 lib/gen/meson.build            |   6 +
 lib/gen/rte_gen.c              | 694 +++++++++++++++++++++++++++++++++
 lib/gen/rte_gen.h              | 114 ++++++
 lib/gen/version.map            |  10 +
 lib/meson.build                |   1 +
 lib/net/meson.build            |   1 +
 lib/net/rte_ip.c               |  58 +++
 lib/net/rte_ip.h               |  38 ++
 lib/net/rte_vxlan.h            |  10 +-
 lib/net/version.map            |   7 +
 18 files changed, 1702 insertions(+), 2 deletions(-)
 create mode 100644 app/test/test_gen.c
 create mode 100644 app/test/test_net.c
 create mode 100644 examples/generator/main.c
 create mode 100644 examples/generator/meson.build
 create mode 100644 lib/gen/meson.build
 create mode 100644 lib/gen/rte_gen.c
 create mode 100644 lib/gen/rte_gen.h
 create mode 100644 lib/gen/version.map
 create mode 100644 lib/net/rte_ip.c