Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

This is the culmination of the previous patches. It adds an api that can
input map data in a string format, but validating the numbers and
locations of data fields. The use case is for fuse file input/output. A
printf api may follow.

Take the table with key/leaf of:
  struct Key { int a; int b; };
  struct Leaf { int a; int b; int c; struct SubLeaf { int x; int y; } s; };

One would input to this table using:
  update_table(table_name, "{1 2}", "{1 2 -3 {9 0xa}}");

The implementation uses a JITed function for each unique type, that is
invoked to run sscanf on behalf of the caller. The input must have the
exact right number of arguments. Bit fields are supported, but the
caller must be aware of the collapse of those bitfields into an aligned
field, as well as endianness.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

It was bothering me that a whole bunch of accesses to the tables were
based on a string hash lookup, in addition to the vectors that were kept
to convert ids to names. Switch those around, as well as the api
internally.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

After the modules have been created, create a helper function for each
table leaf/key type.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

This whole project is about bpf, prefixing everything with the same
acronym is redundant.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add cmake checks for required test programs

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Set as warning, since the build will still work fine and be able to
create a binary package.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Move helper.h prototype for tail call into 4.2 section

With #115, bpf_tail_call was incorrectly disabled in 4.2 builds.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add INSTALL.md instructions for using Ubuntu binary build

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Flags for 4.3 were accidentally committed, revert

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

release IPDB in host ns early

We need it for setting vxlan flow based flags currently. Release
it once the interfaces are set up. This does not help Ctrl-C on
main.py though.
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>

Suggest Release and add X86 target in readme

The default CMAKE_BUILD_TYPE is Debug when cloning from git, suggest
Release instead.

Also, there are some worrisome warnings during cmake when X86 target is
omitted. Additionally, I may want X86 target support for a future
feature, so lets suggest it here.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

llvm 3.7+ deb is broken

https://llvm.org/bugs/show_bug.cgi?id=24154

Build from source until it's resolved. Another plan is to provide
binary package.
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>

better clean up of created namespace/interfaces if ctrl-c is pressed

fix tunnel_mesh.py

The IP assignment was wrong.
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>

  o There are still some cases when ctrl-c is pressed, the program does not exit
    gracefully, with a however lower probability. In my random manual experiments,
    one in ten cases it still hangs and needs further ctrl-z.
Signed-off-by: Yonghong Song <yhs@plumgrid.com>

Reorganize bpf_module into multiple frontend implementations

Add project logo and source files

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

The logo contains elements which are in public domain. The gear
has been modified from illustration submitted by 'hank0071' on
OpenClipart and the font used is Open Sans. There seems to be no
restriction on commercial use.
Signed-off-by: Suchakra Sharma <suchakrapani.sharma@polymtl.ca>

Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Other commits to follow with cleanup of the code itself.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Enable memory cleanup in Clang, otherwise 500KB lost per compile

Since it is meant for the command line, clang ships with no memory
cleanup. We intend to run as a long-lived process, so enable that
cleanup. Valgrind now reports only trivial (and non-increasing over
time) memory leaks.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add version check for functions only in >= 4.3 kernel

Add pkg-config support and include compat/linux* in packaging

Different kernel header versions has been a continuing source of pain.
Though I don't prefer this approach, it seems the most reliable way to
get a build (for the time being) is to bundle the linux/bpf*.h in a
compat directory in the target install location.

To get visibility into that compat directory from another library, one
will need to rely on pkg-config --cflags argument to pull in that compat
directory.

Future work will be to avoid bundling the compat directory if the
version of linux-libc-dev is high enough, or if the presence of the
result of 'make headers_install' from the running kernel can be
detected.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Addresses issue #100

Note to developers working off of net-next: you will need to locally
disable this patch to make use of the new features.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Assign ip address to br