examples: add a XDP firewall example using LPM trie #711
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Signed-off-by: lob <[email protected]>
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Thanks for writing up this example, however I think that its scope is too big for this repository. Adding the LPM map makes for a nice demo but it doesn't make XDP usage clearer than the existing example. What would be nice is to add a netlink fallback to the example from #706. |
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Signed-off-by: lob [email protected]
This PR adds another XDP example. This program is a XDP version of firewall.
It uses
BPF_MAP_TYPE_LPM_TRIEto match IP of incoming packets against the block CIDR. IPv4 packets with source address belonging to block CIDR will be dropped.Related issue: #645.