ABSTRACT
This paper presents P4FPGA, a new tool for developing and
evaluating data plane applications. P4FPGA is an open-source
compiler and runtime. The compiler extends the P4.org reference
compiler with a custom backend that generates FPGA
code. P4FPGA supports different architecture configurations,
depending on the needs of the particular application.
We have benchmarked several representative P4 programs,
and our experiments show that code generated by P4FPGA
runs at line-rate at all packet sizes with latencies comparable
to commercial ASICs. By combining high-level programming
abstractions offered by P4 with a flexible and powerful hardware
target, P4FPGA allows developers to rapidly prototype
and deploy new data plane applications.

you have opinions on SDN, NFV, and whatever other acronyms telcos are using to describe a shell noscript these days
you have tried to design a continuous dynamical system for routing, and got it wrong at least twice

 The example noscript filter_hyperscan.lua demonstrates the basics of Hyperscan and our wrapper API. It receives packets from a port, filters them, and forwards them to a port dropping all packets that match filters given in a file. Moreover, it can generate test traffic by replaying a pcap file on a different port

 local pktLib = require "packet"
local ffi    = require "ffi"
local eth    = require "proto.ethernet"
local ip     = require "proto.ip4"

-- Checks if a UDP packet's payload begins with "EXAMPLE".
-- You can do arbitrary complex stuff here, e.g., attach a DPI library like nDPI.
return function(pkt)
  local udpPkt = pktLib.getUdp4Packet(pkt)
  if udpPkt.eth:getType() == eth.TYPE_IP
  and udpPkt.ip4:getProtocol() == ip.PROTO_UDP then
    local data = ffi.string(udpPkt.payload.uint8, #"EXAMPLE")
    return data == "EXAMPLE"
  end
  return false
end