vFW: Adding Virtual Firewall VNF

JIRA: SAMPLEVNF-4

vFW supports following features:
 - Basic packet filtering (malformed packets, IP fragments)
 - Connection tracking for TCP and UDP
 - Access Control List for rule based policy enforcement
 - SYN-flood protection via Synproxy* for TCP
 - UDP, TCP and ICMP protocol pass-through
 - CLI based enable/disable connection tracking, synproxy,
   basic packet filtering
 - Hardware and Software Load Balancing
 - L2L3 stack support for ARP/ICMP handling
 - Multithread support
 - Multiple physical port support

Change-Id: I96d28858488ed8764370d161975bc1e0557c8b20
Signed-off-by: Anand B Jyoti <anand.b.jyoti@intel.com>
[Push patch to gerrit]
Signed-off-by: Deepak S <deepak.s@linux.intel.com>

1 files changed, 166 insertions, 0 deletions

diff --git a/docs/vFW/README.rst b/docs/vFW/README.rst
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+.. This work is licensed under a creative commons attribution 4.0 international
+.. license.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) opnfv, national center of scientific research "demokritos" and others.
+
+========================================================
+Virtual Firewall - vFW
+========================================================
+
+1. Introduction
+==============
+The virtual firewall (vFW) is an application implements Firewall. vFW is used
+as a barrier between secure internal and an un-secure external network. The
+firewall performs Dynamic Packet Filtering. This involves keeping track of the
+state of Layer 4 (Transport)traffic,by examining both incoming and outgoing
+packets over time. Packets which don't fall within expected parameters given
+the state of the connection are discarded. The Dynamic Packet Filtering will
+be performed by Connection Tracking component, similar to that supported in
+linux. The firewall also supports Access Controlled List(ACL) for rule based
+policy enforcement. Firewall is built on top of DPDK and uses the packet library.
+
+About DPDK
+----------
+The DPDK IP Pipeline Framework provides a set of libraries to build a pipeline
+application. In this document, vFW will be explained in detail with its own
+building blocks.
+
+This document assumes the reader possesses the knowledge of DPDK concepts and
+packet framework. For more details, read DPDK Getting Started Guide, DPDK
+Programmers Guide, DPDK Sample Applications Guide.
+
+2.  Scope
+==========
+This application provides a standalone DPDK based high performance vFW Virtual
+Network Function implementation.
+
+3. Features
+===========
+The vFW VNF currently supports the following functionality:
+  • Basic packet filtering (malformed packets, IP fragments)
+  • Connection tracking for TCP and UDP
+  • Access Control List for rule based policy enforcement
+  • SYN-flood protection via Synproxy* for TCP
+  • UDP, TCP and ICMP protocol pass-through
+  • CLI based enable/disable connection tracking, synproxy, basic packet
+    filtering
+  • Multithread support
+  • Multiple physical port support
+  • Hardware and Software Load Balancing
+  • L2L3 stack support for ARP/ICMP handling
+  • ARP (request, response, gratuitous)
+  • ICMP (terminal echo, echo response, passthrough)
+  • ICMPv6 and ND (Neighbor Discovery)
+
+4. High Level Design
+====================
+The Firewall performs basic filtering for malformed packets and dynamic packet
+filtering incoming packets using the connection tracker library.
+The connection data will be stored using a DPDK hash table. There will be one
+entry in the hash table for each connection. The hash key will be based on source
+address/port,destination address/port, and protocol of a packet. The hash key
+will be processed to allow a single entry to be used, regardless of which
+direction the packet is flowing (thus changing the source and destination).
+The ACL is implemented as libray stattically linked to vFW, which is used for
+used for rule based packet filtering.
+
+TCP connections and UDP pseudo connections will be tracked separately even if
+theaddresses and ports are identical. Including the protocol in the hash key
+will ensure this.
+
+The Input FIFO contains all the incoming packets for vFW filtering.  The vFW
+Filter has no dependency on which component has written to the Input FIFO.
+Packets will be dequeued from the FIFO in bulk for processing by the vFW.
+Packets will be enqueued to the output FIFO.
+The software or hardware loadbalancing can be used for traffic distribution
+across multiple worker threads. The hardware loadbalancing require ethernet
+flow director support from hardware (eg. Fortville x710 NIC card).
+The Input and Output FIFOs will be implemented using DPDK Ring Buffers.
+
+===================
+5. Components of vFW
+===================
+In vFW, each component is constructed using packet framework pipelines.
+It includes Rx and Tx Driver, Master pipeline, load balancer pipeline and
+vfw worker pipeline components. A Pipeline framework is a collection of input
+ports, table(s),output ports and actions (functions).
+
+Receive and Transmit Driver
+******************************
+Packets will be received in bulk and provided to LoadBalancer(LB) thread.
+Transimit takes packets from worker threads in a dedicated ring and sent to
+hardware queue.
+
+Master Pipeline
+******************************
+The Master component is part of all the IP Pipeline applications. This component
+does not process any packets and should configure with Core 0, to allow
+other cores for processing of the traffic. This component is responsible for
+ 1. Initializing each component of the Pipeline application in different threads
+ 2. Providing CLI shell for the user control/debug
+ 3. Propagating the commands from user to the corresponding components
+
+ARPICMP Pipeline
+******************************
+This pipeline processes the APRICMP packets.
+
+TXRX Pipelines
+******************************
+The TXTX and RXRX pipelines are pass through pipelines to forward both ingress
+and egress traffic to Loadbalancer. This is required when the Software
+Loadbalancer is used.
+
+Load Balancer Pipeline
+******************************
+The vFW support both hardware and software balancing for load balancing of
+traffic across multiple VNF threads. The Hardware load balancing require support
+from hardware like Flow Director for steering of packets to application through
+hardware queues.
+
+The Software Load balancer is also supported if hardware load balancing can't be
+used for any reason. The TXRX along with LOADB pipeline provides support for
+software load balancing by distributing the flows to Multiple vFW worker
+threads.
+Loadbalancer (HW or SW) distributes traffic based on the 5 tuple (src addr, src
+port, dest addr, dest port and protocol) applying an XOR logic distributing to
+active worker threads, thereby maintaining an affinity of flows to worker
+threads.
+
+vFW Pipeline
+******************************
+The vFW performs the basic packet filtering and will drop the invalid and
+malformed packets.The Dynamic packet filtering done using the connection tracker
+library. The packets are processed in bulk and Hash table is used to maintain
+the connection details.
+Every TCP/UDP packets are passed through connection tracker library for valid
+connection. The ACL library integrated to firewall provide rule based filtering.
+
+vFW Topology:
+------------------------
+::
+  IXIA(Port 0)-->(Port 0)VNF(Port 1)-->(Port 1) IXIA
+  operation:
+    Egress --> The packets sent out from ixia(port 0) will be Firewalled to ixia(port 1).
+    Igress --> The packets sent out from ixia(port 1) will be Firewalled to ixia(port 0).
+
+vFW Topology (L4REPLAY):
+------------------------------------
+::
+  IXIA(Port 0)-->(Port 0)VNF(Port 1)-->(Port 0)L4REPLAY
+  operation:
+    Egress --> The packets sent out from ixia will pass through vFW to L3FWD/L4REPLAY.
+    Ingress --> The L4REPLAY upon reception of packets (Private to Public Network),
+                will immediately replay back the traffic to IXIA interface. (Pub -->Priv).
+
+How to run L4Replay:
+--------------------
+::
+  1. After the installation of samplevnf:
+     go to <samplevnf/VNFs/L4Replay>
+  2. ./buid/L4replay -c  core_mask -n no_of_channels(let it be as 2) -- -p PORT_MASK --config="(port,queue,lcore)"
+     eg: ./L4replay -c 0xf -n 4 -- -p 0x3 --config="(0,0,1)"
+
+6. Installation, Compile and Execution
+-----------------------------------------------------------------
+Plase refer to <samplevnf>/docs/vFW/INSTALL.rst for installation, configuration,
+compilation and execution.