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ip6 route output() and ip_route_output_key() by drivers

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From: Parav Pandit
Subject: ip6 route output() and ip_route_output_key() by drivers
Date: Wednesday, June 30, 2010 - 12:24 am

Hi,

Our device driver uses ip6 route output() and typecast the return value of dst_entry to rt6_info (similar to (net/ip6/icmp.c)

Driver uses (a) rt6i_dst.addr, (b) rt6i_dst.plen and (c) rt6i_gateway to get the route entry (ip/mask, gw, netdev).

Can anyone please confirm that drivers and/or netfilter kernel modules are allowed to use them? netdev drivers like : cnic.c, cxgb3, nes are using the ipv4 API (but not IPv6 API).

Also ip_route_output_key() rtable and dst_entry doesn't seem to provide route entry's subnet mask/prefix value. how drivers/netfilter kernel module can get a ip/mask gateway value while given a destination IP address as input?

I really appreciate your inputs. I hope I am asking it on the relevant mailing list.

Regards,
Parav Pandit


      
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ip6 route output() and ip_route_output_key() by drivers, Parav Pandit, (Wed Jun 30, 12:24 am)