>>>Module Name:	src
>>>Committed By:	matt
>>>Date:		Sun Jun 15 02:49:35 UTC 2003
>>>
>>>Modified Files:
>>>	src/sys/netinet: igmp.c igmp_var.h in.c in_pcb.c in_pcb.h in_var.h
>>>	    ip_input.c ip_var.h tcp_input.c udp_usrreq.c
>>>
>>>Log Message:
>>>Change the way multicasts are kept.  They now use a hash table in the same
>>>manner as the ifaddr hash table.  By doing this, the mkludge code can go
>>>away.  At the same time, keep track of what pcbs are using what ifaddr and
>>>when an address is deleted from an interface, notify/abort all sockets
>>>that have that address as a source.  Switch IGMP and multicasts to use pools
>>>for allocation.  Fix a number of potential problems in the igmp code where
>>>allocation failures could cause a trap/panic.
>>	tnx for the change.  we still have issued with ip_mroute.c and
>>	if_detach(), which i don't have clear idea how to fix.
>>	(rte->ifp keeps pointer to ifp, and if ifp goes away... bomb)
>	also it seems to me that rti->ifp filled by rti_fill() would never
>	be freed on if_detach().

	it looks to me that IN_MULTI_HASH() is not updated when
	in_delmulti() is called.  also we should remove all in_multi
	on in_pcbpurgeif0().

itojun