openflow | Stanford OpenFlow 1.0 reference switch

by mininet C Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(5)Vulnerabilities Install Support

kandi X-RAY | openflow Summary

openflow is a C library. openflow has no bugs and it has low support. However openflow has 4 vulnerabilities and it has a Non-SPDX License. You can download it from GitHub.

OpenFlow is a flow-based switch specification designed to enable researchers to run experiments in live networks. OpenFlow is based on a simple Ethernet flow switch that exposes a standardized interface for adding and removing flow entries. An OpenFlow switch consists of three parts: (1) A "flow table" in which each flow entry is associated with an action telling the switch how to process the flow, (2) a "secure channel" connecting the switch to a remote process (a controller), allowing commands and packets to be sent between the controller and the switch, and (3) an OpenFlow protocol implementation, providing an open and standard way for a controller to talk to the switch.

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Quality

Security

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Support

openflow has a low active ecosystem.

It has 105 star(s) with 44 fork(s). There are 22 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of openflow is current.

Quality

openflow has 0 bugs and 0 code smells.

Security

openflow has 4 vulnerability issues reported (1 critical, 3 high, 0 medium, 0 low).

openflow code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

openflow has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

openflow releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

It has 160 lines of code, 0 functions and 1 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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openflow Key Features

No Key Features are available at this moment for openflow.

openflow Examples and Code Snippets

No Code Snippets are available at this moment for openflow.

Community Discussions

Trending Discussions on openflow

Updating neo4j relationship properties without duplicating the existing relationship

How to translate a list of items, into a list of dictionaries with the items as dictionary elements

Ryu/OpenFlow how to map in_port number to physical port

How does OpenDayLight discover the network?

Mininet topology is not completing the iperf command from the 2 hosts separated by 2 switches

QUESTION

Updating neo4j relationship properties without duplicating the existing relationship

Asked 2021-May-08 at 05:47

I have the following to first create relationship between nodes (the nodes already created in a previous step)

...

ANSWER

Answered 2021-May-07 at 16:23

If you want to find a :connect relationship between the nodes (you don't care what the properties are to match upon) and then update the properties, then only MERGE the relationship, do not include the properties in the pattern. Then use SET to set the properties to the new values:

Source https://stackoverflow.com/questions/67421392

QUESTION

How to translate a list of items, into a list of dictionaries with the items as dictionary elements

Asked 2021-Apr-27 at 19:29

I have the following list in python:

...

ANSWER

Answered 2021-Apr-27 at 19:29

out = {"data": [{"{#NAPP}": i.split(":")[-1]} for i in napps_list]}

from pprint import pprint    
pprint(out)

Source https://stackoverflow.com/questions/67289471

QUESTION

Ryu/OpenFlow how to map in_port number to physical port

Asked 2020-Apr-24 at 13:54

For the uninitiated - I am asking a Python/SDN question. It is a programming question.

There isn't much literature on this and I didn't see it in the specification. I have built a Ryu controller based on the documentation and have it all working, but I have a rather simple problem:

How do you map the in_port numbers to actual port numbers? In my case, it is saying I have an in_port of 5. However, it's actually coming in to physical port 1/1/2 on my Dell 4112F-ON. There doesn't seem to be any correlation between the two.

If I want to control traffic on a per port basis, how do I know from which physical port the traffic came?

Edit: I know how to convert to a MAC address, but I haven't figured out a clean way to programatically determine the port # from the MAC address.

...

ANSWER

Answered 2020-Apr-24 at 13:54

I discovered that in Ryu, the name of the physical port is inside the dpset data structure which is part of ryu.controller. In dpset there is an attribute called port_state which is a dictionary of type {: }. You can extract the data with the following code:

Source https://stackoverflow.com/questions/60939750

QUESTION

How does OpenDayLight discover the network?

Asked 2020-Apr-17 at 16:39

When I used the ONOS Controller, which uses the OpenFlow Discovery Protocol, each switch had send a PacketIN encapsulated LLDP message back to the controller. These PacketINs are answering the LLDP messages the controller has send to discover the network. This was checked using wireshark. I wanted to check if OpenDayLight had the same behaviour, but there were no PacketINs.

Thats why I wanted to know how ODL gets topology information without receiving any LLDP packages ?

...

ANSWER

Answered 2020-Apr-17 at 16:39

Try installing these three features:

Source https://stackoverflow.com/questions/61254990

QUESTION

Mininet topology is not completing the iperf command from the 2 hosts separated by 2 switches

Asked 2020-Mar-22 at 11:57

I'm trying to complete the mininet topology exercise from this website https://github.com/mininet/openflow-tutorial/wiki/Advanced-Topology. Basically I have to create a topology like this:

h1-----s1---s2----h3

(there is also another host attached to s1 called h2)

and program a POX controller to install flows to the switches so that the pingall and iperf commands work. Everything works fine except for the iperf command which fails when it runs from h1 to h3 or from h2 to h3.

This is the code I have, and I believe the problem has to do with communicating to the right switch what to do with packets of a type different than arp or icmp, but I've been stuck too long on this problem and have decided to ask for help here.

...

ANSWER

Answered 2020-Mar-22 at 11:57

EDIT:

I solved this by flooding IP_packets directed to h3, to all ports except the in_port

Source https://stackoverflow.com/questions/60744613

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install openflow

You can download it from GitHub.

Support

Other than the userspace switch implementation, the software in the OpenFlow distribution should compile under Unix-like environments such as Linux, FreeBSD, Mac OS X, and Solaris. Our primary test environment is Debian GNU/Linux. Please contact us with portability-related bug reports or patches. The userspace datapath implementation should be easy to port to Unix-like systems. The interface to network devices, in netdev.c, is the code most likely to need changes. So far, only Linux is supported. We welcome ports to other platforms. GCC is the expected compiler.

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