On Fri, May 06, 2011 at 05:55:20PM +0200, Alan T DeKok wrote:
> Josip Rodin wrote:
> > % sudo strace freeradius -X
> > [...]
> > socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP) = 5
> > getsockname(5, {sa_family=AF_INET6, sin6_port=htons(0), inet_pton(AF_INET6,
> > "::", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, [28]) = 0
> > setsockopt(5, SOL_IPV6, IPV6_PKTINFO, [1], 4) = -1 EINVAL (Invalid argument)
>
> <sigh> Linux is irritating. The setsockopt() call apparently
> requires IPV6_RECVPKTINFO, instead of IPV6_PKTINFO.
>
> The #ifdef's at the top of src/lib/udpfromto.c *should* set that
> option correctly.
After a bit more digging, it seems you need a simple:
% diff -wu src/lib/udpfromto.c{~,}
--- src/lib/udpfromto.c~ 2010-09-28 13:03:56.000000000 +0200
+++ src/lib/udpfromto.c 2011-05-06 18:00:20.000000000 +0200
@@ -87,7 +87,7 @@
* This should actually be standard IPv6
*/
proto = IPPROTO_IPV6;
- flag = IPV6_PKTINFO;
+ flag = IPV6_RECVPKTINFO;
#endif
#endif
} else {
This seems to be so per RFC 3542 from 2003, which obsoletes RFC 2292
from 1998.
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