Add a Learning VLAN program example

* Create a simulation of a physical network with multiple vlans, which
  can accept and distribute connections from multiple clients in
  overlapping subnets. The program will assign to a worker based on mac
  address.
* Remove a hardcoded SO_ATTACH_BPF literal, and fix one spacing
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

add another bridge-router-bridge test (test_brb2)

  o router is implemented as a namespace, similar to test_brb.
  o using linux bridge to provide bridge functionality.
    In test_brb, a simple bpf program implemented limited
    bridge functionality.
  o on my local box, test_brb performance is roughly 12% better
    than test_brb2.
Signed-off-by: Yonghong Song <yhs@plumgrid.com>

use 64bit ulonglong to represent mac address

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

use ethernet->src/dst to get mac address instead of primitive load_* …

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

Fix for >32B bpf_pkt_dext calls

add a bridge-router-bridge test with router implemented as a namespace

* Fix the shift which was 4 (bytes) instead of 32 (bits)
* Remove an incorrect ntoh
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Signed-off-by: Yonghong Song <yhs@plumgrid.com>

start building FAQ

Omit leading 'v' from python .tar.gz revision

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

build without have to install llvm/clang

just update PATH to include 'llvm-config' from your local
llvm build directory.
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>

Drop 'experimental' from README.md

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

Make installation prefixes more realistic

* Add/document cmake variables that control various installation path
  options. See README.md for examples.
* Updated README a bit
* Hide helpers.h from include requirements
* Install things to real paths in a proper way. Header files will go
  into <prefix>/share/bcc/include.
* Move the kickstart script readme to its own directory.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

fix build with gcc < 4.9

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>

Fix test_call1 for systems without default qdisc

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

Fix test_xlate1 when systems have no default tc

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

Remove BPF_LL_OFF usage

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

Add python packaging for the bpf library

* Add tagging/git support
* Reorganize bpf py lib to be more pythonic
* Add pip installable builders
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

Add simple single file example

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

Update license in source code to be Apache 2

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

Convert to using pyroute2 for tc

* Remove libbpf.c netlink
* Requires pyroute2 from source
 git clone https://github.com/svinota/pyroute2.git;
          cd pyroute2; sudo make install

Update: Remove references to mnl
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>