Logarithm and expnential-function estimation in P4 language

Citation

@inproceedings{ding2019estimating,
  title={Estimating Logarithmic and Exponential Functions to Track Network Traffic Entropy in P4},
  author={Ding, Damu and Savi, Marco and Siracusa, Domenico},
  booktitle={IEEE/IFIP Network Operations and Management Symposium (NOMS)},
  year={2020}
}   

Installation

1. Install docker if you don't already have it.

2. Clone the repository to local

   git clone https://github.com/DINGDAMU/P4Log_and_P4Exp.git    
   

3.  cd P4Log_and_P4Exp
   

4. If you want, put the p4app script somewhere in your path. For example:

   cp p4app /usr/local/bin
   

   I have already modified the default docker image to dingdamu/p4app-ddos:nwhhd, so p4app script can be used directly.

P4Log algorithm

1. ./p4app run log.p4app 
   

   After this step you'll see the terminal of mininet
2. Forwarding some packets in mininet

    pingall
   

3. Enter log.p4app folder

    cd log.p4app 
   

4. Check the result by reading the register

    ./read_registers1.sh
   

5. Register[0] is the input value and Register[1] is the result of log2(Register[0]) amplified $2^{10}$ times

P4Exp algorithm

1. ./p4app run exp.p4app 
   

   After this step you'll see the terminal of mininet
2. Forwarding some packets in mininet

    pingall
   

3. Enter exp.p4app folder

    cd exp.p4app 
   

4. Check the result by reading the register

    ./read_registers1.sh
   

5. Register[0] is the base and Register[1] is the exponent, the exponential-function result is in Register[2]