NAME

       function::tcpmib_filter_key - Default filter function for tcpmib.* probes

SYNOPSIS

           tcpmib_filter_key:long(sk:long,op:long)

ARGUMENTS

       sk
           pointer to the struct sock being acted on

       op
           value to be counted if sk passes the filter

DESCRIPTION

       This function is a default filter function. The user can replace this function with their
       own. The user-supplied filter function returns an index key based on the values in sk. A
       return value of 0 means this particular sk should be not be counted.