RECV_RULE_CTL_ENABLE
#define RULE_MATCH(ring) (RECV_RULE_CTL_ENABLE | RECV_RULE_CTL_OP_EQ | \
if ((rulep[i].control & RECV_RULE_CTL_ENABLE) == 0 &&
(rulep[i+1].control & RECV_RULE_CTL_ENABLE) == 0)