[ovs-discuss] query related to GRE encapsulation

[Ben Pfaff]

On Tue, Feb 24, 2015 at 01:33:29PM +0000, Chetan Bali wrote:
> I am configuring gre-port in my ovs bridge, for establishing gre-tunnel between 2 machines. I am trying to parse the tunnelling key params sent by OVS while adding flow, when it sets action as OVS_ACTION_ATTR_SET. I am parsing the tun-key attributes in dpif-linux.c in exact manner as ovs does, i.e., nla_data(nla_data(action)) where action is in "nlattr"  type. Tun-key params that I am trying to fetch are as per struct "ovs_key_ipv4_tunnel" i.e.,
> struct ovs_key_ipv4_tunnel {
>     __be64 tun_id;
>     __be32 ipv4_src;
>     __be32 ipv4_dst;
>     __be16 tun_flags;
>     u8   ipv4_tos;
>     u8   ipv4_ttl;
> };
> The problem is that, while parsing I am getting incorrect tun-key params, whereas I can see by putting prints that openvswitchd.ko is getting correct tun-key params.

I guess you're doing something wrong.  Show us your code?