This module matches the 6 bit DSCP field within the TOS field in the IP header. DSCP has superseded TOS within the IETF.

--dscp value
    Match against a numeric (decimal or hex) value [0-32].

--dscp-class DiffServ Class
    Match the DiffServ class. This value may be any of the BE, EF, AFxx or CSx classes. It will then be converted into it's according numeric value.