[ovs-discuss] Best way to implement a partial wildcard match?

[YIMIN CHEN]

Hi,

I am looking at a way to perform a flow match based on src mac, but
only part of it, say the first 4 bytes of the mac address. Can I do
similar things like nw_src_mask/nw_dst_mask?

/* Information on wildcards for a flow, as a supplement to flow_t. */
struct flow_wildcards {
    uint32_t wildcards;         /* enum ofp_flow_wildcards (in host order). */
    uint32_t nw_src_mask;       /* 1-bit in each significant nw_src bit. */
    uint32_t nw_dst_mask;       /* 1-bit in each significant nw_dst bit. */
};

Can I add a new src mac mask to the flow_wildcards and change
corresponding lookup functions to handle it similar to IP mask?

Thanks!
Yimin