sys/netinet6/mld6.c

1903 	 * If we detect a state transition to or from MCAST_UNDEFINED
1910 		if (inm->in6m_st[0].iss_fmode == MCAST_UNDEFINED) {
1914 		} else if (inm->in6m_st[1].iss_fmode == MCAST_UNDEFINED) {
2243 		inm->in6m_st[1].iss_fmode = MCAST_UNDEFINED;
2244 		CTR3(KTR_MLD, "%s: T1 now MCAST_UNDEFINED for %p/%s",
2330 		 * If we are transitioning to MCAST_UNDEFINED, we need
2351 					 * MCAST_UNDEFINED and MCAST_INCLUDE.
2356 					if (mode == MCAST_UNDEFINED) {
2363 					if (mode == MCAST_UNDEFINED)
2480 	 * transitioning to MCAST_UNDEFINED state on the group, and
2506 			     (!use_block_allow && mode == MCAST_UNDEFINED))) {
2597 			     (!use_block_allow && mode == MCAST_UNDEFINED))) {
2635 	REC_NONE = 0x00,	/* MCAST_UNDEFINED */