ipsec: input: drop by default for non-matching pkts

As per IPSec RFC4301 [1], any non-matching packets should be dropped by
default. This is handled correctly in ipsec_output.c, however in
ipsec_input.c non-matching packets are allowed to pass as per a matched
BYPASS rule.

For full details, see:
https://lists.fd.io/g/vpp-dev/topic/ipsec_input_output_default/84943480

It appears the ipsec6_input_node only matches PROTECT policies. Until
this is extended to handle BYPASS + DISCARD, we may wish to not drop
by default here, since all IPv6 traffic not matching a PROTECT policy
will be dropped.

[1]: https://datatracker.ietf.org/doc/html/rfc4301

Type: fix
Signed-off-by: Zachary Leaf <zachary.leaf@arm.com>
Change-Id: Iddbfd008dbe082486d1928f6a10ffbd83d859a20
4 files changed
tree: d1ff50ea37c938f7caa4b88ca25885c13f83d4bb
  1. build/
  2. build-data/
  3. build-root/
  4. docs/
  5. extras/
  6. src/
  7. test/
  8. .clang-format
  9. .clang-tidy
  10. .git_commit_template.txt
  11. .gitignore
  12. .gitreview
  13. configure
  14. INFO.yaml
  15. LICENSE
  16. MAINTAINERS
  17. Makefile
  18. README.md
README.md

Vector Packet Processing

Introduction

The VPP platform is an extensible framework that provides out-of-the-box production quality switch/router functionality. It is the open source version of Cisco's Vector Packet Processing (VPP) technology: a high performance, packet-processing stack that can run on commodity CPUs.

The benefits of this implementation of VPP are its high performance, proven technology, its modularity and flexibility, and rich feature set.

For more information on VPP and its features please visit the FD.io website and What is VPP? pages.

Changes

Details of the changes leading up to this version of VPP can be found under doc/releasenotes.

Directory layout

Directory nameDescription
build-dataBuild metadata
build-rootBuild output directory
docsSphinx Documentation
dpdkDPDK patches and build infrastructure
extras/libmemifClient library for memif
src/examplesVPP example code
src/pluginsVPP bundled plugins directory
src/svmShared virtual memory allocation library
src/testsStandalone tests (not part of test harness)
src/vatVPP API test program
src/vlibVPP application library
src/vlibapiVPP API library
src/vlibmemoryVPP Memory management
src/vnetVPP networking
src/vppVPP application
src/vpp-apiVPP application API bindings
src/vppinfraVPP core library
src/vpp/apiNot-yet-relocated API bindings
testUnit tests and Python test harness

Getting started

In general anyone interested in building, developing or running VPP should consult the VPP wiki for more complete documentation.

In particular, readers are recommended to take a look at [Pulling, Building, Running, Hacking, Pushing](https://wiki.fd.io/view/VPP/Pulling,_Building,_Run ning,_Hacking_and_Pushing_VPP_Code) which provides extensive step-by-step coverage of the topic.

For the impatient, some salient information is distilled below.

Quick-start: On an existing Linux host

To install system dependencies, build VPP and then install it, simply run the build script. This should be performed a non-privileged user with sudo access from the project base directory:

./extras/vagrant/build.sh

If you want a more fine-grained approach because you intend to do some development work, the Makefile in the root directory of the source tree provides several convenience shortcuts as make targets that may be of interest. To see the available targets run:

make

Quick-start: Vagrant

The directory extras/vagrant contains a VagrantFile and supporting scripts to bootstrap a working VPP inside a Vagrant-managed Virtual Machine. This VM can then be used to test concepts with VPP or as a development platform to extend VPP. Some obvious caveats apply when using a VM for VPP since its performance will never match that of bare metal; if your work is timing or performance sensitive, consider using bare metal in addition or instead of the VM.

For this to work you will need a working installation of Vagrant. Instructions for this can be found [on the Setting up Vagrant wiki page] (https://wiki.fd.io/view/DEV/Setting_Up_Vagrant).

More information

Several modules provide documentation, see @subpage user_doc for more end-user-oriented information. Also see @subpage dev_doc for developer notes.

Visit the VPP wiki for details on more advanced building strategies and other development notes.