NPF_RULE_RETICMP
mi->mi_retfl |= NPF_RULE_RETICMP;
mi->mi_retfl &= !(NPF_RULE_RETICMP);
if (retfl & NPF_RULE_RETICMP)
if (attr & NPF_RULE_LAYER_2 && attr & (NPF_RULE_RETRST | NPF_RULE_RETICMP))
| RETURNICMP { $$ = NPF_RULE_RETICMP; }
| RETURN { $$ = NPF_RULE_RETRST | NPF_RULE_RETICMP; }