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branch: master

Fix strict masked ip matching.

Quick and dirty hack to stop different IP addresses, with equal masks,
to match.
The problem is caused because we work with IP addresses in the network
byte order format and the function strict_match32 performs matching
on values in the host byte order. Thus, in little endian machines,
the function will not work.
Problems like this show  that the match needs a
huge refactoring.
latest commit c31d2a1c84
@ederlf ederlf authored

README.md

OpenFlow 1.3 Software Switch

This is an OpenFlow 1.3 compatible user-space software switch implementation. The code is based on the Ericsson TrafficLab 1.1 softswitch implementation, with changes in the forwarding plane to support OpenFlow 1.3.

The following components are available in this package:

  • ofdatapath: the switch implementation
  • ofprotocol: secure channel for connecting the switch to the controller
  • oflib: a library for converting to/from 1.3 wire format
  • dpctl: a tool for configuring the switch from the console

Getting Started

These instructions have been tested on Ubuntu 12.04. Other distributions or versions may need different steps.

For Ubuntu 14.04, please check @castroflavio solution: How to compile on Ubuntu 14.04

Before building

The switch makes use of the NetBee library to parse packets, so we need to install it first.

  1. Install the following packages:

    $ sudo apt-get install cmake libpcap-dev libxerces-c2-dev libpcre3-dev flex bison pkg-config autoconf libtool libboost-dev
    
  2. Download the most recent Netbee version, and unpack the source code from:http://www.nbee.org/download/nbeesrc-jan-10-2013.php

  3. Create the build system

    $ cd nbeesrc/src
    $ cmake .
    
  4. Compile

    $ make
    
  5. Add the shared libraries built in /nbeesrc/bin/ to your /usr/local/lib directory

    $ sudo cp ../bin/libn*.so /usr/local/lib
    
  6. Run ldconfig

    $ sudo ldconfig
    
  7. Put the contens of folder nbeesrc/include in the /usr/include

    $ sudo cp -R ../include/* /usr/include/
    

Building

Run the following commands in the ofsoftswitch13 directory to build and install everything:

$ ./boot.sh
$ ./configure
$ make
$ sudo make install

Running

  1. Start the datapath:

    $ sudo udatapath/ofdatapath --datapath-id=<dpid> --interfaces=<if-list> ptcp:<port>
    

    This will start the datapath, with the given datapath ID, using the interaces listed. It will open a passive TCP connection on the given port. For a complete list of options, use the --help argument.

  2. Start the secure channel, which will connect the datapath to the controller:

    $ secchan/ofprotocol tcp:<switch-host>:<switch-port> tcp:<ctrl-host>:<ctrl-port>
    

    This will open TCP connections to both the switch and the controller, relaying OpenFlow protocol messages between them. For a complete list of options, use the --help argument.

Configuring

You can send requests to the switch using the dpctl utility.

  • Check the flow statistics for table 0.

    $ utilities/dpctl tcp:<switch-host>:<switch-port> stats-flow table=0
    
  • Install a flow to match IPv6 packets with extension headers hop by hop and destination and coming from port 1.

    $ utilities/dpctl tcp:<switch-host>:<switch-port> flow-mod table=0,cmd=add in_port=1,eth_type=0x86dd,ext_hdr=hop+dest apply:output=2
    
  • Add a meter:

    $ utilities/dpctl tcp:<switch-host>:<switch-port> meter-mod cmd=add,meter=1 drop:rate=50
    
  • Send flow to meter table

    $ utilities/dpctl tcp:<switch-host>:<switch-port> flow-mod table=0,cmd=add in_port=1 meter:1
    

For a complete list of commands and arguments, use the --help argument.

The dpctl utility has some limitations at the moment:

  • No support for OXM masks
  • No support for multipart messages
  • Some set_field action fields are not present

Contribute

Please submit your bug reports, fixes and suggestions as pull requests on GitHub, or by contacting us directly.

License

OpenFlow 1.3 Software Switch is released under the BSD license (BSD-like for code from the original Stanford switch).

Acknowledgments

This project is supported by Ericsson Innovation Center in Brazil. Maintained by CPqD in technical collaboration with Ericsson Research.

Contributions:

Zoltán Lajos Kis, ofsoftswitch 1.1 implementation and guidance for OpenFlow spec related subjects.

Jean Tourrilhes, lots of critical memory bug fixes on table features.

Khai Nguyen Dinh and Thanh Le Dinh, contributions on meter features.

Rich Lane, added the right compiler linker.

yu-iwata, fixed flow deletion without matchin out_port.

Yuval Adler, bug fixes related to matching on vlan and ethertype.

Hiroyasu OHYAMA, correct URL of NetBee Library.

...

"Your name here" -- please, let us know if we forgot to add your name to the list of contributors!

Contact

E-mail: Eder Leao Fernandes (ederleaofernandes at gmail . com)

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