RB_PROTOTYPE(pim_ifchannel_rb, pim_ifchannel, pim_ifp_rb,
pim_ifchannel_compare);
-void pim_ifchannel_free(struct pim_ifchannel *ch);
void pim_ifchannel_delete(struct pim_ifchannel *ch);
void pim_ifchannel_delete_all(struct interface *ifp);
void pim_ifchannel_membership_clear(struct interface *ifp);