Microflow

The light-weighted, lightning fast OpenFlow SDN controller capable of multi-threads and clustering.

#Build & Run cd src

sudo make

sudo ./microflow

WebUI can be accessed at: localhost:8000

#Current status

###Architecture Design DONE
Async event drive
Multiple lock-free recv queues
One producer & Multiple workers
Shared memory(trying to make it lock-free) among workers

###Socket/epoll communication DONE
Enable non-blocking & Async socket interface
Handled by dedicated thread & CPU core

###Multi-thread implementation DONE Separated thread for socket\worker\timer\others
Allows full-utilization of CPU time when busy and zero CPU usage when free
Lock-Free msg recv queue implementation
CPU affinity allows to take the full advantage of multi-core CPUs

###Memory pool implementation DONE Memory pool for received msgs
Eliminate time-consumption malloc/free operations
Eliminate redundant memory copy actions in user space

###Timer & Logger implementation DONE Implement particular function in a cycled way
Time precision is 1 ms
Log particular msgs to log file with timestamp
Not for real-time application

###Device manager implementation Phase I&II DONE Maintain a hash-table for all the switches & hosts in the network
Pre-alloced memory cells, eliminate malloc/free

###OpenFlow msg handler implementation Phase I&II DONE
Hello & Echo & Feature_request handler
Packet out sender
Packet_in handler
Multipart reply msg handler
ARP msg handler
LLDP msg handler
Port statistic msg handler
Register/unregister customized handler according to different msg type

###Topology manager implementation Phase I DONE Maintain network links
Maintain switch links
Pre-alloced memory cells, eliminate malloc/free
Merge lock-free list

###Logo Design DONE :D Thanks to Miss Hong :p

###Http server/Web GUI DONE Http server
Web GUI based on bootstrap jQuery and D3.js

###Lock-free linked-list & hashtable Used for device manager and topo manager
Eliminate performance bottleneck in multi-thread environment

#TODO List

###OpenFlow msg handler implementation Phase II
Statistic msgs handler
Flow-mod msgs

###Topology manager implementation Phase II Path calculation

###Http server/Web GUI Phase II More WebUI features
Devices(switches + hosts) status
Topo status
Warning/error messages
Port/Link status

###Cluster A cluster service based on network games' mechanism

###Documents
An introduction doc & manual
Architecture design doc

#Contact & Bug Report Pan Zhang
dazhangpan@gmail.com