IPv6 multicast sendto() 'operation not supported'

[Donald McLachlan]

Hi,

Yes, the bind() succeeded, and in fact the receiver side was able to receive
packets.  Only sendto() failed.

Don


> From jinmei at isl.rdc.toshiba.co.jp Thu Feb 26 21:54:52 2004
> 
> >>>>> On Thu, 26 Feb 2004 11:27:31 -0500 (EST), 
> >>>>> Donald McLachlan <don at mainframe.dgrc.crc.ca> said:
> 
> > In preparation for writing an IPv6 multicast application I wrote a little
> > test program (shown below).  This program worked on linux (RedHat), but
> > when I try it on a FreeBSD box (5.0, running zebra router and pim6dd)
> > sendto() fails with "Operation not supported" ... ???
> 
> > To verify my app was OK, I installed a solaris box on the LAN beside the
> > linux box and the app compiled and worked fine.
> 
> > Thinking it might be a bug in 5.0 or an interaction with zebra/pim6dd I
> > installed a FreeBSD 5.2 box on the lan beside the other 2 app boxes and
> > I get the same error again.  Anyone know what is missing/wrong in my test app?
> 
> > [ I'm guessing FreeBSD wants some extra socket options set, but I don't know
> >   which ones. ]
> 
> Did your code really succeed the bind(2) call in the main function?
> 
> > 	bzero((char *)&sin, (int)sizeof(sin));		/* setup address info */
> > 	bcopy(the_addr, (char *)&sin.sin6_addr, sizeof(the_addr));
> > 	sin.sin6_family = AF_INET6;
> > 	sin.sin6_port = htons(3000);
> > 							/* bind addr to sock */
> > 	if(bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
> > 	{
> > 		perror("bind");
> > 		exit(errno);
> > 	}
> 
> FreeBSD should require a valid sin6_len (which should be
> sizeof(sockaddr_in6)), so the program should have stopped here.
> 
> 					JINMEI, Tatuya
> 					Communication Platform Lab.
> 					Corporate R&D Center, Toshiba Corp.
> 					jinmei at isl.rdc.toshiba.co.jp
>