Subject: Re: kern/23221: setsockopt IP_ADD_MEMBERSHIP arguments not honored
To: None <>
From: Jun-ichiro itojun Hagino <>
List: tech-net
Date: 10/24/2003 14:02:00
> I'm posting here to try and drive some action to a PR I have filed 
> regarding the handling of IPv4 multicast traffic in BSD4.4-Lite based 
> operating systems.  
> There is an error in handling incoming packets in udp4_realinput() 
> (src/sys/netinet/udp_usrreq.c at line 582).  Inbound multicast packets 
> on any interface listening to a given multicast address are passed to 
> every socket listening to that address.  This behavior is inconsistent 
> with the documentation in ip(4)s manpage and with the description given 
> in UNP Vol. 1 (Stevens) at page 496.

	the current behavior is the same as traditional 4.4BSD behavior.