An Unknown Protocol Identification Method for Industrial Internet

Algorithm 1

Eps neighborhood hit algorithm.

1 input: Known protocol feature set , input message feature set , neighborhood distance , minimum number of neighborhood points ;

2: Output: Known protocol classification dataset;

3: Ifthen

4: Check eps();

5: If the number of midpoints is greater than or equal to then

6:  Add point to the set of visited points ;

7:  Add point to known protocol classification dataset ;

8: Else

9:  The number of midpoints in is equal to 0;

10: End if

11: Else

12: Check eps()

13: If and the number of midpoints is greater than or equal to then

14:  Add point to the set of visited points ;

15:  Add point to known protocol classification dataset ;

16:  Break;

17: End if

18: End if