On Thu, 16 Aug 2007 12:21:14 -0700 "Luis Carlos Cobo" <[EMAIL PROTECTED]> wrote:
> On 7/30/07, Stephen Hemminger <[EMAIL PROTECTED]> wrote: > > it would need an IP ttl to mesh mapping. The fundamental thing is to try > > and avoid topology specific options bleeding all the way up the socket > > layer, > > especially since the network layer is involved and may need to multipath. > > I think the cleanest way would be to add a ll_ttl (ll for link layer) > field to struct sock and a SO_LL_TTL socket option that sets both the > field and a flag in sk->flags. This way it is useful for any driver > that can do mesh or any other protocol that involves a ttl at link > layer (not that I'm aware of any). > > However I guess you are not supposed to add new socket options nor > modify struct socket too often so I'd appreciate feedback on whether > this would be considered a good approach. > > -- > Luis Carlos Cobo Rus GnuPG ID: 44019B60 > cozybit Inc. The problem with socket options is how does the application know the correct policy? Pushing configuration to application is just deferring the problem, not solving it. You want some policy to be done by the infrastructure; that means kernel, libraries, daemons, etc. Doing it in the application is often inflexible and unusable. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
