ipv6: RTM_GETROUTE inconsistent interpretation of RTA_IIF
From: Shmulik Ladkani <hidden>
Date: 2012-04-01 06:18:17
(Bump) Any reason not to submit a patch that fixes the below issue? Regards, Shmulik On Thu, 29 Mar 2012 15:03:11 +0200 Shmulik Ladkani [off-list ref] wrote:
Hi, In IPv4, if the RTA_IIF attribute is specified in an RTM_GETROUTE message, then a route is searched as if a packet was received on the specified iif interface - i.e. 'inet_rtm_getroute()' calls 'ip_route_input()'. However in IPv6, RTA_IIF is not interpreted in the same way: 'inet6_rtm_getroute()' always calls 'ip6_route_output()', regardless the RTA_IIF attribute. As a result, in IPv6 there's no way to use RTM_GETROUTE in order to look for a route as if a packet was received on a specific interface. I'd like to modify 'inet6_rtm_getroute()' so that RTA_IIF is interpreted in the same way as in IPv4's 'inet_rtm_getroute()'. Before I come up with a patch, I'd like to know whether current interpretation of RTA_IIF in 'inet6_rtm_getroute()' is deliberate.